/* roulang page: index */
:root {
            --primary: #1B3D5C;
            --primary-dark: #142E45;
            --accent: #2EA87C;
            --accent-light: #E8F5F0;
            --bg-light: #EDF2F7;
            --bg-page: #F7FAFC;
            --text-main: #1A2733;
            --text-secondary: #52616F;
            --text-tertiary: #8A98A5;
            --border: #E2E9F0;
            --shadow-card: 0 4px 16px rgba(27, 61, 92, 0.06);
            --shadow-hover: 0 8px 28px rgba(27, 61, 92, 0.12);
            --radius-card: 10px;
            --radius-btn: 6px;
            --radius-tag: 4px;
            --font-cn: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: Inter, "SF Pro Display", "PingFang SC", sans-serif;
            --transition: all 0.25s ease;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-main);
            background: var(--bg-page);
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media screen and (min-width: 1440px) {
            .container {
                max-width: 1400px;
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
        }

        .section-pad {
            padding: 80px 0;
        }

        @media screen and (max-width: 768px) {
            .section-pad {
                padding: 48px 0;
            }
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-sub {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 40px;
        }

        @media screen and (max-width: 768px) {
            .section-title {
                font-size: 24px;
            }
            .section-sub {
                font-size: 14px;
                margin-bottom: 28px;
            }
        }

        .tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-tag);
            background: var(--accent-light);
            color: var(--accent);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .tag.primary-tag {
            background: var(--bg-light);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            font-family: var(--font-cn);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.5;
            text-align: center;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: #fff;
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }

        .btn-link {
            background: none;
            border: none;
            color: var(--primary);
            padding: 0;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-link:hover {
            color: var(--accent);
        }

        .card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .card-body {
            padding: 24px;
        }

        @media screen and (max-width: 520px) {
            .card-body {
                padding: 16px;
            }
        }

        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: transform 0.25s ease;
        }

        .card:hover .card-img {
            transform: scale(1.02);
        }

        .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-tertiary);
            flex-wrap: wrap;
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 8px rgba(27, 61, 92, 0.04);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 16px;
        }

        .brand-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-logo {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
            letter-spacing: -1px;
        }

        .brand-name {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        @media screen and (max-width: 520px) {
            .brand-name {
                font-size: 18px;
            }
            .brand-logo {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }
        }

        .brand-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-right .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-page);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 6px 14px;
            gap: 6px;
        }

        .brand-right .search-box input {
            border: none;
            background: transparent;
            font-size: 13px;
            color: var(--text-main);
            width: 120px;
            font-family: var(--font-cn);
            outline: none;
        }

        .brand-right .search-box i {
            color: var(--text-tertiary);
            font-size: 13px;
        }

        @media screen and (max-width: 640px) {
            .brand-right .search-box {
                display: none;
            }
        }

        .nav-icon-grid {
            display: flex;
            align-items: center;
            justify-content: flex-start;
            gap: 4px;
            padding: 10px 0;
            border-top: 1px solid var(--border);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .nav-icon-grid::-webkit-scrollbar {
            display: none;
        }

        .nav-icon-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
            min-width: 72px;
            cursor: pointer;
            border: none;
            background: none;
            font-family: var(--font-cn);
        }

        .nav-icon-item i {
            font-size: 20px;
            color: var(--text-tertiary);
            transition: var(--transition);
        }

        .nav-icon-item:hover {
            color: var(--primary);
            background: var(--bg-light);
        }

        .nav-icon-item:hover i {
            color: var(--primary);
        }

        .nav-icon-item.active {
            color: var(--primary);
            background: var(--bg-light);
        }

        .nav-icon-item.active i {
            color: var(--primary);
        }

        @media screen and (max-width: 768px) {
            .nav-icon-item {
                min-width: 64px;
                padding: 6px 10px;
                font-size: 11px;
            }
            .nav-icon-item i {
                font-size: 18px;
            }
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--primary);
            cursor: pointer;
            padding: 4px;
        }

        @media screen and (max-width: 640px) {
            .mobile-toggle {
                display: block;
            }
        }

        /* Hero Bento */
        .hero-section {
            padding: 60px 0 40px;
            background: #fff;
        }

        .hero-bento {
            display: grid;
            grid-template-columns: 2fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
        }

        .hero-main {
            grid-row: 1 / span 2;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            border-radius: var(--radius-card);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            box-shadow: var(--shadow-card);
        }

        .hero-main::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27, 61, 92, 0.88) 0%, rgba(27, 61, 92, 0.55) 60%, rgba(27, 61, 92, 0.3) 100%);
            border-radius: var(--radius-card);
        }

        .hero-main-content {
            position: relative;
            z-index: 2;
            color: #fff;
        }

        .hero-main .tag {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
            margin-bottom: 16px;
        }

        .hero-main h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .hero-main p {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.88);
            max-width: 520px;
            margin-bottom: 28px;
        }

        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero-cta-group .btn-primary {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }

        .hero-cta-group .btn-primary:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        .hero-cta-group .btn-secondary {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
        }

        .hero-cta-group .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border-color: #fff;
        }

        .hero-sub-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            justify-content: center;
            transition: var(--transition);
            cursor: default;
        }

        .hero-sub-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .hero-sub-card .icon-circle {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 18px;
            margin-bottom: 12px;
            flex-shrink: 0;
        }

        .hero-sub-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .hero-sub-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .hero-cta-strip {
            grid-column: 1 / -1;
            background: var(--primary);
            border-radius: var(--radius-card);
            padding: 16px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero-cta-strip span {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .hero-cta-strip .btn {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            padding: 8px 18px;
            font-size: 13px;
        }

        .hero-cta-strip .btn:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        @media screen and (max-width: 768px) {
            .hero-section {
                padding: 24px 0 32px;
            }
            .hero-bento {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .hero-main {
                grid-row: auto;
                min-height: 300px;
                padding: 28px 20px;
            }
            .hero-main h1 {
                font-size: 28px;
            }
            .hero-main p {
                font-size: 14px;
                margin-bottom: 20px;
            }
            .hero-cta-strip {
                grid-column: 1;
            }
        }

        /* Services */
        .services-section {
            background: var(--bg-page);
        }

        .services-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
            align-items: start;
        }

        .services-intro {
            position: sticky;
            top: 140px;
        }

        .services-intro .section-title {
            margin-bottom: 12px;
        }

        .services-intro .section-sub {
            margin-bottom: 24px;
        }

        .services-grid-2x2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .service-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: default;
        }

        .service-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .service-card .icon-box {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 16px;
            margin-bottom: 12px;
        }

        .service-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .service-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .service-card .btn-link {
            font-size: 13px;
        }

        @media screen and (max-width: 1024px) {
            .services-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .services-intro {
                position: static;
            }
        }

        @media screen and (max-width: 640px) {
            .services-grid-2x2 {
                grid-template-columns: 1fr;
            }
        }

        /* Data strip */
        .data-strip {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .data-strip-inner {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 0;
            padding: 32px 0;
        }

        .data-stat {
            text-align: center;
            padding: 12px 16px;
            border-right: 1px solid var(--border);
        }

        .data-stat:last-child {
            border-right: none;
        }

        .data-stat .stat-num {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-num);
            letter-spacing: -0.5px;
            margin-bottom: 4px;
        }

        .data-stat .stat-num .accent {
            color: var(--accent);
        }

        .data-stat .stat-label {
            font-size: 12px;
            color: var(--text-tertiary);
            line-height: 1.5;
        }

        @media screen and (max-width: 768px) {
            .data-strip-inner {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
                padding: 20px 0;
            }
            .data-stat {
                border-right: none;
                padding: 8px;
            }
            .data-stat .stat-num {
                font-size: 24px;
            }
        }

        @media screen and (max-width: 520px) {
            .data-strip-inner {
                grid-template-columns: 1fr;
                gap: 4px;
            }
        }

        /* Scene demo */
        .scene-section {
            background: var(--bg-page);
        }

        .scene-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 32px;
        }

        .scene-step {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .scene-step:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .scene-step .step-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 700;
            margin: 0 auto 12px;
            font-family: var(--font-num);
        }

        .scene-step h3 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .scene-step p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        @media screen and (max-width: 1024px) {
            .scene-steps {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media screen and (max-width: 520px) {
            .scene-steps {
                grid-template-columns: 1fr;
            }
        }

        /* Cases */
        .cases-section {
            background: #fff;
        }

        .cases-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 16px;
        }

        .case-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .case-card .case-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
        }

        .case-card .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.25s ease;
        }

        .case-card:hover .case-img-wrap img {
            transform: scale(1.03);
        }

        .case-card .case-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .case-card .case-body h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .case-card .case-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            flex: 1;
        }

        .case-card .case-body .card-meta {
            font-size: 12px;
        }

        @media screen and (max-width: 1024px) {
            .cases-grid {
                grid-template-columns: 1fr 1fr;
            }
            .case-card:first-child {
                grid-column: 1 / -1;
            }
        }

        @media screen and (max-width: 520px) {
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .case-card:first-child {
                grid-column: auto;
            }
        }

        /* Deep content section */
        .deep-section {
            background: var(--bg-page);
        }

        .deep-content {
            max-width: 880px;
            margin: 0 auto;
            background: #fff;
            border-radius: var(--radius-card);
            padding: 48px 56px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }

        .deep-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 20px;
            line-height: 1.4;
        }

        .deep-content h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin: 28px 0 12px;
            line-height: 1.4;
        }

        .deep-content h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin: 20px 0 8px;
        }

        .deep-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .deep-content .highlight-box {
            background: var(--bg-light);
            border-left: 3px solid var(--primary);
            padding: 20px 24px;
            border-radius: 0 8px 8px 0;
            margin: 24px 0;
            font-size: 14px;
            color: var(--text-main);
            line-height: 1.8;
        }

        .deep-content img {
            border-radius: 8px;
            margin: 20px 0;
        }

        @media screen and (max-width: 768px) {
            .deep-content {
                padding: 24px 20px;
            }
            .deep-content h2 {
                font-size: 22px;
            }
            .deep-content h3 {
                font-size: 16px;
            }
        }

        /* Brand intro */
        .brand-intro-section {
            background: #fff;
        }

        .brand-intro-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            padding: 48px 0;
        }

        .brand-intro-content .brand-mini-logo {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 700;
            margin: 0 auto 20px;
        }

        .brand-intro-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            max-width: 700px;
            margin: 0 auto 16px;
        }

        /* News */
        .news-section {
            background: var(--bg-page);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 32px;
        }

        .news-main-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 20px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .news-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .news-item.featured {
            display: grid;
            grid-template-columns: 240px 1fr;
            gap: 20px;
            align-items: center;
        }

        .news-item.featured .news-img {
            width: 100%;
            aspect-ratio: 16/10;
            border-radius: 8px;
            object-fit: cover;
        }

        .news-item .news-date {
            font-size: 12px;
            color: var(--text-tertiary);
            font-family: var(--font-num);
            margin-bottom: 6px;
        }

        .news-item h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .news-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .news-item .btn-link {
            font-size: 13px;
        }

        .news-sidebar {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            align-self: start;
        }

        .news-sidebar h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .news-sidebar .sidebar-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-secondary);
            transition: var(--transition);
            cursor: pointer;
        }

        .news-sidebar .sidebar-link:last-child {
            border-bottom: none;
        }

        .news-sidebar .sidebar-link:hover {
            color: var(--primary);
            padding-left: 6px;
        }

        @media screen and (max-width: 1024px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
        }

        @media screen and (max-width: 640px) {
            .news-item.featured {
                grid-template-columns: 1fr;
            }
            .news-item {
                padding: 16px;
            }
        }

        /* Changelog */
        .changelog-section {
            background: #fff;
        }

        .changelog-list {
            max-width: 700px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .changelog-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 16px 20px;
            border-radius: 8px;
            background: var(--bg-page);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .changelog-item:hover {
            border-color: var(--primary);
            background: #fff;
        }

        .changelog-item .version-badge {
            background: var(--primary);
            color: #fff;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            white-space: nowrap;
            font-family: var(--font-num);
        }

        .changelog-item .changelog-info h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .changelog-item .changelog-info p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        @media screen and (max-width: 520px) {
            .changelog-item {
                flex-direction: column;
                gap: 8px;
            }
        }

        /* Collection directory */
        .collection-section {
            background: var(--bg-page);
        }

        .collection-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .collection-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px 20px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            text-align: center;
            transition: var(--transition);
            cursor: pointer;
        }

        .collection-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .collection-card .collection-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--accent-light);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin: 0 auto 12px;
        }

        .collection-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .collection-card p {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
        }

        @media screen and (max-width: 1024px) {
            .collection-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media screen and (max-width: 520px) {
            .collection-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Category selection */
        .category-section {
            background: #fff;
        }

        .category-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .category-tag {
            padding: 10px 18px;
            border-radius: 20px;
            background: var(--bg-page);
            border: 1px solid var(--border);
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
            font-family: var(--font-cn);
        }

        .category-tag:hover {
            background: var(--accent-light);
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .category-tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* Platform assurance */
        .assurance-section {
            background: var(--bg-page);
        }

        .assurance-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .assurance-item {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .assurance-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .assurance-item i {
            font-size: 28px;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .assurance-item h3 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .assurance-item p {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        @media screen and (max-width: 1024px) {
            .assurance-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media screen and (max-width: 520px) {
            .assurance-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Testimonials */
        .testimonial-section {
            background: #fff;
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .testimonial-card {
            background: var(--bg-page);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .testimonial-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .testimonial-card .quote-mark {
            color: var(--accent);
            font-size: 32px;
            line-height: 1;
            margin-bottom: 12px;
            font-family: Georgia, serif;
        }

        .testimonial-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .testimonial-card .author {
            font-size: 13px;
            font-weight: 700;
            color: var(--text-main);
        }

        .testimonial-card .role {
            font-size: 12px;
            color: var(--text-tertiary);
        }

        @media screen and (max-width: 1024px) {
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media screen and (max-width: 640px) {
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-page);
        }

        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .accordion {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .accordion-item {
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }

        .accordion-item:last-child {
            border-bottom: none;
        }

        .accordion-title {
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: var(--transition);
            background: #fff;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-cn);
        }

        .accordion-title:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        .accordion-title .accordion-arrow {
            color: var(--text-tertiary);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .accordion-item.is-active .accordion-title {
            color: var(--primary);
            background: var(--bg-light);
        }

        .accordion-item.is-active .accordion-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .accordion-content {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .accordion-item.is-active .accordion-content {
            padding: 0 24px 20px;
            max-height: 400px;
        }

        /* Contact / CTA */
        .contact-section {
            background: var(--bg-page);
            padding-bottom: 80px;
        }

        .contact-wrapper {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            display: grid;
            grid-template-columns: 3fr 2fr;
        }

        .contact-form-area {
            padding: 40px;
        }

        .contact-form-area h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .contact-form-area .form-sub {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .contact-form-area label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
            display: block;
        }

        .contact-form-area input,
        .contact-form-area select,
        .contact-form-area textarea {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-family: var(--font-cn);
            color: var(--text-main);
            background: #fff;
            transition: var(--transition);
            margin-bottom: 16px;
            outline: none;
        }

        .contact-form-area input:focus,
        .contact-form-area select:focus,
        .contact-form-area textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 61, 92, 0.1);
            outline: none;
        }

        .contact-form-area textarea {
            resize: vertical;
            min-height: 100px;
        }

        .contact-info-area {
            background: var(--primary);
            padding: 40px;
            color: #fff;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .contact-info-area h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .contact-info-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 16px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.6;
        }

        .contact-info-item i {
            color: var(--accent);
            font-size: 16px;
            margin-top: 2px;
            flex-shrink: 0;
        }

        @media screen and (max-width: 768px) {
            .contact-wrapper {
                grid-template-columns: 1fr;
            }
            .contact-form-area {
                padding: 24px 20px;
            }
            .contact-info-area {
                padding: 24px 20px;
            }
        }

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: var(--primary);
            padding: 12px 0;
            transform: translateY(100%);
            transition: transform 0.4s ease;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .floating-cta.visible {
            transform: translateY(0);
        }

        .floating-cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .floating-cta-inner span {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
        }

        .floating-cta-inner .btn {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            padding: 8px 18px;
            font-size: 13px;
        }

        .floating-cta-inner .btn:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        @media screen and (max-width: 640px) {
            .floating-cta-inner {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        /* Footer */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 3fr 2fr 2fr 3fr;
            gap: 32px;
            padding-bottom: 32px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
            font-size: 13px;
        }

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 13px;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-subscribe p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }

        .footer-subscribe .subscribe-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .footer-subscribe input {
            flex: 1;
            min-width: 160px;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 13px;
            font-family: var(--font-cn);
            outline: none;
            transition: var(--transition);
        }

        .footer-subscribe input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 61, 92, 0.1);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
            align-items: center;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-tertiary);
            margin: 0;
        }

        .footer-bottom .footer-links {
            display: flex;
            gap: 16px;
            font-size: 12px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .footer-bottom .footer-links a {
            color: var(--text-tertiary);
            font-size: 12px;
        }

        .footer-bottom .footer-links a:hover {
            color: var(--primary);
        }

        @media screen and (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media screen and (max-width: 640px) {
            .site-footer {
                padding: 32px 0 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                padding: 16px 0;
            }
        }

        /* Additional utility */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .d-flex {
            display: flex;
        }
        .align-center {
            align-items: center;
        }
        .justify-between {
            justify-content: space-between;
        }

/* roulang page: category3 */
:root {
            --primary: #1B3D5C;
            --primary-dark: #142E45;
            --accent: #2EA87C;
            --accent-light: #E8F5F0;
            --bg-light: #EDF2F7;
            --bg-page: #F7FAFC;
            --text-main: #1A2733;
            --text-secondary: #52616F;
            --text-tertiary: #8A98A5;
            --border: #E2E9F0;
            --shadow-card: 0 4px 16px rgba(27, 61, 92, 0.06);
            --shadow-hover: 0 8px 28px rgba(27, 61, 92, 0.12);
            --radius-card: 10px;
            --radius-btn: 6px;
            --radius-tag: 4px;
            --font-cn: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: Inter, "SF Pro Display", "PingFang SC", sans-serif;
            --transition: all 0.25s ease;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-main);
            background: var(--bg-page);
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1280px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        .section-pad {
            padding: 80px 0;
        }

        @media (max-width: 640px) {
            .section-pad {
                padding: 48px 0;
            }
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-sub {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 40px;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
            .section-sub {
                font-size: 14px;
                margin-bottom: 28px;
            }
        }

        .tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-tag);
            background: var(--accent-light);
            color: var(--accent);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .tag.primary-tag {
            background: var(--bg-light);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            font-family: var(--font-cn);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.5;
            text-align: center;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: #fff;
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }

        .btn-link {
            background: none;
            border: none;
            color: var(--primary);
            padding: 0;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-link:hover {
            color: var(--accent);
        }

        .card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .card-body {
            padding: 24px;
        }

        @media (max-width: 640px) {
            .card-body {
                padding: 16px;
            }
        }

        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: transform 0.25s ease;
        }

        .card:hover .card-img {
            transform: scale(1.02);
        }

        .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.97);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(27, 61, 92, 0.04);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            gap: 16px;
        }

        .brand-area {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .brand-logo {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .brand-name span {
            display: block;
            font-size: 12px;
            font-weight: 400;
            color: var(--text-tertiary);
        }

        .brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .header-date {
            font-size: 13px;
            color: var(--text-tertiary);
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }

        .hamburger-btn {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 8px 12px;
            font-size: 16px;
            color: var(--primary);
            cursor: pointer;
            transition: var(--transition);
        }

        .hamburger-btn:hover {
            background: var(--bg-light);
        }

        /* Icon Nav */
        .nav-icon-grid {
            display: flex;
            gap: 6px;
            padding: 8px 0 12px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-icon-grid::-webkit-scrollbar {
            display: none;
        }

        .nav-icon-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            padding: 8px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .nav-icon-item i {
            font-size: 20px;
            color: var(--text-tertiary);
            transition: var(--transition);
        }

        .nav-icon-item:hover {
            color: var(--primary);
            background: var(--bg-light);
        }

        .nav-icon-item:hover i {
            color: var(--accent);
        }

        .nav-icon-item.active {
            color: var(--primary);
            background: var(--accent-light);
            border-color: var(--border);
            font-weight: 700;
        }

        .nav-icon-item.active i {
            color: var(--primary);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-tertiary);
            padding: 16px 0;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        .breadcrumb .sep {
            color: var(--border);
        }

        /* Page Hero */
        .page-hero {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 40px 32px;
            margin-bottom: 32px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary);
        }

        .page-hero h1 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .page-hero .hero-sub {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 800px;
            margin-bottom: 0;
        }

        @media (max-width: 640px) {
            .page-hero {
                padding: 24px 20px 20px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .page-hero .hero-sub {
                font-size: 14px;
            }
        }

        /* Two Big Cards */
        .big-card-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 48px;
        }

        .big-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .big-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .big-card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
        }

        .big-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .big-card:hover .big-card-img-wrap img {
            transform: scale(1.04);
        }

        .big-card-body {
            padding: 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .big-card-body h2 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 10px;
        }

        .big-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
            flex: 1;
        }

        .big-card-stats {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            border-top: 1px solid var(--border);
            padding-top: 16px;
            margin-top: auto;
        }

        .big-card-stat {
            display: flex;
            flex-direction: column;
        }

        .big-card-stat .stat-num {
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }

        .big-card-stat .stat-label {
            font-size: 12px;
            color: var(--text-tertiary);
        }

        @media (max-width: 768px) {
            .big-card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .big-card-body {
                padding: 20px;
            }
        }

        /* Deep Content */
        .deep-content {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 48px;
            margin-bottom: 48px;
        }

        .deep-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.35;
            margin-bottom: 20px;
            letter-spacing: -0.3px;
        }

        .deep-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.5;
            margin: 28px 0 12px;
        }

        .deep-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .deep-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 8px 8px 0;
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.8;
        }

        .deep-content img {
            border-radius: 8px;
            margin: 24px 0;
            width: 100%;
            aspect-ratio: 16/8;
            object-fit: cover;
        }

        .deep-content .content-meta {
            display: flex;
            gap: 12px;
            align-items: center;
            font-size: 13px;
            color: var(--text-tertiary);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .deep-content .content-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        @media (max-width: 640px) {
            .deep-content {
                padding: 24px 20px;
            }
            .deep-content h2 {
                font-size: 20px;
            }
            .deep-content h3 {
                font-size: 16px;
            }
        }

        /* Related Items */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 48px;
        }

        .related-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .related-card-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }

        .related-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .related-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            flex: 1;
        }

        .related-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-tertiary);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }

        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* Data Strip */
        .data-strip {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px 40px;
            margin-bottom: 48px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            box-shadow: var(--shadow-card);
        }

        .data-item {
            text-align: center;
            padding: 8px 0;
        }

        .data-item + .data-item {
            border-left: 1px solid var(--border);
        }

        .data-item .data-num {
            font-family: var(--font-num);
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
        }

        .data-item .data-label {
            font-size: 13px;
            color: var(--text-tertiary);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .data-strip {
                grid-template-columns: 1fr 1fr;
                padding: 20px;
                gap: 16px;
            }
            .data-item + .data-item {
                border-left: none;
            }
            .data-item:nth-child(odd) {
                border-right: 1px solid var(--border);
            }
            .data-item:nth-child(n+3) {
                border-top: 1px solid var(--border);
                padding-top: 16px;
            }
        }

        @media (max-width: 640px) {
            .data-strip {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .data-item + .data-item {
                border-top: 1px solid var(--border);
                padding-top: 12px;
            }
            .data-item:nth-child(odd) {
                border-right: none;
            }
        }

        /* CTA Section */
        .cta-section {
            background: var(--primary);
            border-radius: var(--radius-card);
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            margin-bottom: 48px;
            flex-wrap: wrap;
        }

        .cta-section h2 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .cta-section p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 520px;
        }

        .cta-section .btn {
            flex-shrink: 0;
        }

        .cta-section .btn-primary {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }

        .cta-section .btn-primary:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .cta-section .btn-secondary {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
        }

        .cta-section .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-color: #fff;
        }

        @media (max-width: 640px) {
            .cta-section {
                padding: 28px 20px;
                flex-direction: column;
                text-align: center;
                gap: 20px;
            }
            .cta-section p {
                max-width: 100%;
            }
        }

        /* Footer */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 3fr 2fr 2fr 3fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-top: 8px;
        }

        .footer-col h4,
        .footer-subscribe h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 6px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
        }

        .footer-subscribe p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .subscribe-form {
            display: flex;
            gap: 8px;
        }

        .subscribe-form input {
            flex: 1;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 13px;
            font-family: var(--font-cn);
            transition: var(--transition);
            min-width: 0;
        }

        .subscribe-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 61, 92, 0.1);
            outline: none;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            font-size: 12px;
            color: var(--text-tertiary);
            text-align: center;
        }

        .footer-links {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            font-size: 13px;
        }

        .footer-links a {
            color: var(--text-tertiary);
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-links span {
            color: var(--border);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                text-align: center;
            }
            .footer-links {
                flex-wrap: wrap;
                justify-content: center;
            }
        }

        /* Mobile Nav */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: -320px;
            width: 320px;
            max-width: 85vw;
            height: 100vh;
            background: #fff;
            z-index: 200;
            box-shadow: -8px 0 32px rgba(27, 61, 92, 0.15);
            transition: right 0.3s ease;
            padding: 24px;
            overflow-y: auto;
        }

        .mobile-menu.open {
            right: 0;
        }

        .mobile-menu-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }

        .mobile-menu-header .brand-logo {
            width: 32px;
            height: 32px;
            font-size: 14px;
        }

        .mobile-menu-close {
            background: none;
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 6px 10px;
            font-size: 16px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
        }

        .mobile-menu-close:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        .mobile-menu .nav-icon-item {
            flex-direction: row;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            font-size: 15px;
            border-radius: 8px;
            width: 100%;
            justify-content: flex-start;
        }

        .mobile-menu .nav-icon-item i {
            font-size: 18px;
            width: 24px;
            text-align: center;
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(27, 61, 92, 0.4);
            z-index: 180;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .mobile-overlay.show {
            display: block;
            opacity: 1;
        }

        @media (max-width: 1024px) {
            .nav-icon-grid {
                gap: 2px;
            }
            .nav-icon-item {
                padding: 8px 10px;
                font-size: 12px;
            }
            .nav-icon-item i {
                font-size: 18px;
            }
        }

        @media (max-width: 768px) {
            .hamburger-btn {
                display: inline-flex;
                align-items: center;
                gap: 6px;
            }
            .nav-icon-grid.desktop-nav {
                display: none;
            }
            .mobile-menu {
                display: block;
            }
            .header-date {
                display: none;
            }
            .brand-name span {
                display: none;
            }
        }

        @media (min-width: 769px) {
            .mobile-menu,
            .mobile-overlay {
                display: none !important;
            }
        }

        /* Accessibility */
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category2 */
:root {
 --primary: #1B3D5C;
 --primary-dark: #142E45;
 --accent: #2EA87C;
 --accent-light: #E8F5F0;
 --bg-light: #EDF2F7;
 --bg-page: #F7FAFC;
 --text-main: #1A2733;
 --text-secondary: #52616F;
 --text-tertiary: #8A98A5;
 --border: #E2E9F0;
 --shadow-card: 0 4px 16px rgba(27, 61, 92, 0.06);
 --shadow-hover: 0 8px 28px rgba(27, 61, 92, 0.12);
 --radius-card: 10px;
 --radius-btn: 6px;
 --radius-tag: 4px;
 --font-cn: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
 --font-num: Inter, "SF Pro Display", "PingFang SC", sans-serif;
 --transition: all 0.25s ease;
}
html {
 scroll-behavior: smooth;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
}
body {
 font-family: var(--font-cn);
 font-size: 15px;
 line-height: 1.85;
 color: var(--text-main);
 background: var(--bg-page);
 overflow-x: hidden;
}
a {
 color: var(--primary);
 text-decoration: none;
 transition: var(--transition);
}
a:hover {
 color: var(--accent);
 text-decoration: none;
}
a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
 outline: 2px solid var(--primary);
 outline-offset: 2px;
}
img {
 max-width: 100%;
 height: auto;
 display: block;
}
.container {
 max-width: 1200px;
 margin: 0 auto;
 padding: 0 24px;
}
@media (min-width: 1400px) {
 .container {
  max-width: 1400px;
 }
}
@media (max-width: 639px) {
 .container {
  padding: 0 16px;
 }
}
.section-pad {
 padding: 80px 0;
}
@media (max-width: 639px) {
 .section-pad {
  padding: 48px 0;
 }
}
.section-title {
 font-size: 32px;
 font-weight: 700;
 color: var(--text-main);
 line-height: 1.3;
 margin-bottom: 16px;
 letter-spacing: -0.5px;
}
.section-sub {
 font-size: 15px;
 color: var(--text-secondary);
 line-height: 1.8;
 max-width: 720px;
 margin-bottom: 40px;
}
@media (max-width: 639px) {
 .section-title {
  font-size: 24px;
 }
 .section-sub {
  font-size: 14px;
  margin-bottom: 28px;
 }
}
.tag {
 display: inline-block;
 padding: 4px 10px;
 font-size: 12px;
 font-weight: 600;
 border-radius: var(--radius-tag);
 background: var(--accent-light);
 color: var(--accent);
 letter-spacing: 0.3px;
 white-space: nowrap;
}
.tag.primary-tag {
 background: var(--bg-light);
 color: var(--primary);
}
.btn {
 display: inline-flex;
 align-items: center;
 gap: 8px;
 padding: 12px 24px;
 border-radius: var(--radius-btn);
 font-size: 14px;
 font-weight: 600;
 font-family: var(--font-cn);
 cursor: pointer;
 transition: var(--transition);
 border: 2px solid transparent;
 line-height: 1.5;
 text-align: center;
 white-space: nowrap;
}
.btn-primary {
 background: var(--primary);
 color: #fff;
 border-color: var(--primary);
}
.btn-primary:hover {
 background: var(--primary-dark);
 border-color: var(--primary-dark);
 color: #fff;
 transform: translateY(-2px);
 box-shadow: var(--shadow-hover);
}
.btn-primary:active {
 transform: translateY(0);
 box-shadow: var(--shadow-card);
}
.btn-secondary {
 background: #fff;
 color: var(--primary);
 border-color: var(--primary);
}
.btn-secondary:hover {
 background: #fff;
 color: var(--accent);
 border-color: var(--accent);
 transform: translateY(-2px);
 box-shadow: var(--shadow-card);
}
.btn-secondary:active {
 transform: translateY(0);
 box-shadow: none;
}
.btn-sm {
 padding: 8px 16px;
 font-size: 13px;
}
.btn-link {
 background: none;
 border: none;
 color: var(--primary);
 padding: 0;
 font-size: 14px;
 font-weight: 600;
 cursor: pointer;
 display: inline-flex;
 align-items: center;
 gap: 6px;
}
.btn-link:hover {
 color: var(--accent);
}
.card {
 background: #fff;
 border-radius: var(--radius-card);
 box-shadow: var(--shadow-card);
 border: 1px solid var(--border);
 transition: var(--transition);
 overflow: hidden;
}
.card:hover {
 box-shadow: var(--shadow-hover);
 border-color: var(--primary);
 transform: translateY(-4px);
}
.card-body {
 padding: 24px;
}
@media (max-width: 639px) {
 .card-body {
  padding: 16px;
 }
}
.card-img {
 width: 100%;
 aspect-ratio: 16/9;
 object-fit: cover;
 transition: transform 0.25s ease;
}
.card:hover .card-img {
 transform: scale(1.02);
}
.card-title {
 font-size: 16px;
 font-weight: 600;
 color: var(--text-main);
 line-height: 1.4;
 margin-bottom: 8px;
}
.card-text {
 font-size: 14px;
 color: var(--text-secondary);
 line-height: 1.7;
 margin-bottom: 12px;
 display: -webkit-box;
 -webkit-line-clamp: 3;
 -webkit-box-orient: vertical;
 overflow: hidden;
}
/* Header / Nav */
.site-header {
 position: sticky;
 top: 0;
 z-index: 999;
 background: #fff;
 border-bottom: 1px solid var(--border);
 box-shadow: 0 2px 12px rgba(27, 61, 92, 0.04);
}
.brand-row {
 display: flex;
 align-items: center;
 justify-content: space-between;
 padding: 14px 0;
}
.brand-area {
 display: flex;
 align-items: center;
 gap: 12px;
}
.brand-logo {
 width: 40px;
 height: 40px;
 border-radius: 8px;
 background: var(--primary);
 color: #fff;
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 18px;
 font-weight: 700;
 flex-shrink: 0;
}
.brand-name {
 font-size: 18px;
 font-weight: 700;
 color: var(--text-main);
}
.brand-sub-name {
 font-size: 12px;
 color: var(--text-tertiary);
 display: block;
}
.brand-actions {
 display: flex;
 align-items: center;
 gap: 12px;
}
.brand-actions .search-btn {
 width: 36px;
 height: 36px;
 border-radius: 50%;
 border: 1px solid var(--border);
 background: #fff;
 color: var(--text-secondary);
 display: flex;
 align-items: center;
 justify-content: center;
 cursor: pointer;
 transition: var(--transition);
}
.brand-actions .search-btn:hover {
 border-color: var(--primary);
 color: var(--primary);
}
.nav-icon-grid {
 display: flex;
 align-items: center;
 gap: 4px;
 padding: 8px 0 12px;
 overflow-x: auto;
 -webkit-overflow-scrolling: touch;
 scrollbar-width: none;
}
.nav-icon-grid::-webkit-scrollbar {
 display: none;
}
.nav-icon-item {
 display: flex;
 flex-direction: column;
 align-items: center;
 gap: 6px;
 padding: 8px 14px;
 border-radius: 8px;
 font-size: 12px;
 color: var(--text-secondary);
 white-space: nowrap;
 transition: var(--transition);
 flex-shrink: 0;
}
.nav-icon-item i {
 font-size: 20px;
 transition: var(--transition);
}
.nav-icon-item:hover {
 color: var(--primary);
 background: var(--bg-light);
}
.nav-icon-item:hover i {
 color: var(--accent);
}
.nav-icon-item.active {
 color: var(--primary);
 background: var(--bg-light);
}
.nav-icon-item.active i {
 color: var(--primary);
}
.nav-icon-item.active span {
 font-weight: 700;
}
/* Breadcrumb */
.breadcrumb-area {
 background: #fff;
 border-bottom: 1px solid var(--border);
 padding: 16px 0;
}
.breadcrumb {
 display: flex;
 align-items: center;
 gap: 8px;
 font-size: 13px;
 color: var(--text-tertiary);
 flex-wrap: wrap;
}
.breadcrumb a {
 color: var(--text-secondary);
}
.breadcrumb a:hover {
 color: var(--primary);
}
.breadcrumb .separator {
 color: var(--border);
}
/* Deep Content */
.deep-content-section {
 background: #fff;
 border-bottom: 1px solid var(--border);
}
.deep-content-wrap {
 max-width: 860px;
 margin: 0 auto;
}
.deep-content-wrap h2 {
 font-size: 24px;
 font-weight: 700;
 color: var(--text-main);
 margin: 32px 0 16px;
 line-height: 1.4;
}
.deep-content-wrap h3 {
 font-size: 18px;
 font-weight: 600;
 color: var(--primary);
 margin: 24px 0 12px;
}
.deep-content-wrap p {
 font-size: 15px;
 color: var(--text-secondary);
 line-height: 1.9;
 margin-bottom: 16px;
}
.deep-content-wrap .highlight-box {
 background: var(--bg-light);
 border-left: 3px solid var(--primary);
 padding: 16px 20px;
 border-radius: 0 8px 8px 0;
 margin: 20px 0;
 font-size: 14px;
 color: var(--text-secondary);
}
.deep-content-wrap .highlight-box strong {
 color: var(--primary);
}
/* Data Metrics Strip */
.metrics-strip {
 background: var(--bg-page);
 border-bottom: 1px solid var(--border);
}
.metrics-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 24px;
}
@media (max-width: 768px) {
 .metrics-grid {
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
 }
}
@media (max-width: 520px) {
 .metrics-grid {
  grid-template-columns: 1fr;
 }
}
.metric-item {
 background: #fff;
 border-radius: var(--radius-card);
 padding: 24px;
 text-align: center;
 border: 1px solid var(--border);
 box-shadow: var(--shadow-card);
 transition: var(--transition);
}
.metric-item:hover {
 transform: translateY(-4px);
 box-shadow: var(--shadow-hover);
 border-color: var(--primary);
}
.metric-value {
 font-size: 32px;
 font-weight: 700;
 font-family: var(--font-num);
 color: var(--primary);
 line-height: 1.2;
 margin-bottom: 6px;
}
.metric-label {
 font-size: 13px;
 color: var(--text-tertiary);
}
/* Four Card List */
.four-card-section {
 background: #fff;
 border-bottom: 1px solid var(--border);
}
.four-card-grid {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 24px;
}
@media (max-width: 1024px) {
 .four-card-grid {
  grid-template-columns: repeat(2, 1fr);
 }
}
@media (max-width: 520px) {
 .four-card-grid {
  grid-template-columns: 1fr;
 }
}
/* Scenario Section */
.scenario-section {
 background: var(--bg-page);
 border-bottom: 1px solid var(--border);
}
.scenario-grid {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 24px;
}
@media (max-width: 768px) {
 .scenario-grid {
  grid-template-columns: 1fr;
 }
}
.scenario-card {
 background: #fff;
 border-radius: var(--radius-card);
 padding: 24px;
 border: 1px solid var(--border);
 box-shadow: var(--shadow-card);
 transition: var(--transition);
}
.scenario-card:hover {
 transform: translateY(-4px);
 box-shadow: var(--shadow-hover);
 border-color: var(--primary);
}
.scenario-card .icon-circle {
 width: 44px;
 height: 44px;
 border-radius: 50%;
 background: var(--accent-light);
 color: var(--accent);
 display: flex;
 align-items: center;
 justify-content: center;
 font-size: 18px;
 margin-bottom: 16px;
}
/* Process Section */
.process-section {
 background: #fff;
 border-bottom: 1px solid var(--border);
}
.process-steps {
 display: grid;
 grid-template-columns: repeat(4, 1fr);
 gap: 20px;
 position: relative;
}
@media (max-width: 768px) {
 .process-steps {
  grid-template-columns: repeat(2, 1fr);
 }
}
@media (max-width: 520px) {
 .process-steps {
  grid-template-columns: 1fr;
 }
}
.process-step {
 text-align: center;
 padding: 24px 16px;
 position: relative;
}
.process-step .step-number {
 width: 36px;
 height: 36px;
 border-radius: 50%;
 background: var(--primary);
 color: #fff;
 display: flex;
 align-items: center;
 justify-content: center;
 font-weight: 700;
 font-family: var(--font-num);
 margin: 0 auto 12px;
}
.process-step .step-title {
 font-size: 15px;
 font-weight: 600;
 color: var(--text-main);
 margin-bottom: 6px;
}
.process-step .step-desc {
 font-size: 13px;
 color: var(--text-tertiary);
 line-height: 1.6;
}
/* Feature Section */
.feature-section {
 background: var(--bg-page);
 border-bottom: 1px solid var(--border);
}
.feature-grid {
 display: grid;
 grid-template-columns: repeat(3, 1fr);
 gap: 24px;
}
@media (max-width: 768px) {
 .feature-grid {
  grid-template-columns: 1fr;
 }
}
.feature-card {
 background: #fff;
 border-radius: var(--radius-card);
 padding: 28px 24px;
 border: 1px solid var(--border);
 box-shadow: var(--shadow-card);
 transition: var(--transition);
}
.feature-card:hover {
 transform: translateY(-4px);
 box-shadow: var(--shadow-hover);
 border-color: var(--primary);
}
.feature-card .feature-icon {
 font-size: 28px;
 color: var(--accent);
 margin-bottom: 12px;
}
.feature-card h3 {
 font-size: 16px;
 font-weight: 600;
 color: var(--text-main);
 margin-bottom: 8px;
}
.feature-card p {
 font-size: 14px;
 color: var(--text-secondary);
 line-height: 1.7;
 margin: 0;
}
/* FAQ */
.faq-section {
 background: #fff;
 border-bottom: 1px solid var(--border);
}
.faq-section .accordion {
 max-width: 860px;
 margin: 0 auto;
}
.faq-section .accordion-item {
 border: 1px solid var(--border);
 border-radius: var(--radius-card);
 margin-bottom: 12px;
 overflow: hidden;
 background: #fff;
 box-shadow: var(--shadow-card);
}
.faq-section .accordion-item.is-active {
 border-color: var(--primary);
}
.faq-section .accordion-title {
 font-size: 16px;
 font-weight: 600;
 color: var(--text-main);
 padding: 16px 20px;
 display: flex;
 align-items: center;
 justify-content: space-between;
 background: #fff;
 border: none;
 cursor: pointer;
 transition: var(--transition);
}
.faq-section .accordion-title:hover {
 background: var(--bg-light);
}
.faq-section .accordion-title::after {
 content: '\f078';
 font-family: 'Font Awesome 6 Free';
 font-weight: 900;
 font-size: 14px;
 color: var(--text-tertiary);
 transition: transform 0.3s ease;
}
.faq-section .accordion-item.is-active .accordion-title::after {
 transform: rotate(180deg);
 color: var(--primary);
}
.faq-section .accordion-content {
 padding: 0 20px 16px;
 font-size: 14px;
 color: var(--text-secondary);
 line-height: 1.8;
 border: none;
}
/* CTA Section */
.cta-section {
 background: var(--primary);
 color: #fff;
 border-bottom: 1px solid rgba(255,255,255,0.05);
}
.cta-grid {
 display: grid;
 grid-template-columns: 3fr 2fr;
 gap: 40px;
 align-items: center;
}
@media (max-width: 768px) {
 .cta-grid {
  grid-template-columns: 1fr;
  gap: 24px;
 }
}
.cta-section h2 {
 color: #fff;
 font-size: 28px;
 font-weight: 700;
 margin-bottom: 12px;
}
.cta-section p {
 color: rgba(255,255,255,0.8);
 font-size: 14px;
 line-height: 1.8;
}
.cta-form {
 background: rgba(255,255,255,0.08);
 border-radius: var(--radius-card);
 padding: 24px;
 border: 1px solid rgba(255,255,255,0.12);
}
.cta-form input,
.cta-form select,
.cta-form textarea {
 width: 100%;
 padding: 12px;
 border: 1px solid rgba(255,255,255,0.2);
 border-radius: var(--radius-btn);
 background: rgba(255,255,255,0.06);
 color: #fff;
 font-family: var(--font-cn);
 font-size: 14px;
 transition: var(--transition);
 margin-bottom: 12px;
}
.cta-form input::placeholder,
.cta-form textarea::placeholder {
 color: rgba(255,255,255,0.5);
}
.cta-form input:focus,
.cta-form select:focus,
.cta-form textarea:focus {
 border-color: var(--accent);
 outline: 2px solid var(--accent);
 outline-offset: 2px;
 background: rgba(255,255,255,0.1);
}
.cta-form select option {
 color: var(--text-main);
 background: #fff;
}
.cta-form .btn-primary {
 background: #fff;
 color: var(--primary);
 border-color: #fff;
}
.cta-form .btn-primary:hover {
 background: var(--accent-light);
 color: var(--primary);
 border-color: var(--accent-light);
}
.cta-contact-list {
 list-style: none;
 margin: 0;
 padding: 0;
}
.cta-contact-list li {
 display: flex;
 align-items: center;
 gap: 10px;
 padding: 8px 0;
 font-size: 14px;
 color: rgba(255,255,255,0.8);
}
.cta-contact-list i {
 color: var(--accent);
 width: 18px;
}
/* Footer */
.site-footer {
 background: #142E45;
 color: rgba(255,255,255,0.7);
 padding: 48px 0 24px;
}
.footer-grid {
 display: grid;
 grid-template-columns: 3fr 2fr 2fr 3fr;
 gap: 32px;
 margin-bottom: 32px;
}
@media (max-width: 768px) {
 .footer-grid {
  grid-template-columns: 1fr;
  gap: 24px;
 }
}
.site-footer .brand-logo {
 background: rgba(255,255,255,0.1);
 color: var(--accent);
}
.site-footer h4 {
 color: #fff;
 font-size: 16px;
 font-weight: 600;
 margin-bottom: 12px;
}
.site-footer p {
 font-size: 13px;
 line-height: 1.7;
}
.footer-col ul {
 list-style: none;
 margin: 0;
 padding: 0;
}
.footer-col ul li {
 padding: 4px 0;
}
.footer-col ul li a {
 color: rgba(255,255,255,0.7);
 font-size: 13px;
}
.footer-col ul li a:hover {
 color: var(--accent);
}
.subscribe-form {
 display: flex;
 gap: 8px;
}
.subscribe-form input {
 flex: 1;
 padding: 10px 14px;
 border: 1px solid rgba(255,255,255,0.2);
 border-radius: var(--radius-btn);
 background: rgba(255,255,255,0.06);
 color: #fff;
 font-family: var(--font-cn);
 font-size: 13px;
}
.subscribe-form input::placeholder {
 color: rgba(255,255,255,0.4);
}
.subscribe-form input:focus {
 border-color: var(--accent);
 outline: none;
}
.subscribe-form .btn-primary {
 background: var(--accent);
 border-color: var(--accent);
}
.subscribe-form .btn-primary:hover {
 background: #1f8a63;
 border-color: #1f8a63;
}
.footer-bottom {
 border-top: 1px solid rgba(255,255,255,0.08);
 padding-top: 20px;
 display: flex;
 flex-direction: column;
 gap: 8px;
}
.footer-links {
 display: flex;
 align-items: center;
 gap: 12px;
 font-size: 13px;
}
.footer-links a {
 color: rgba(255,255,255,0.7);
}
.footer-links a:hover {
 color: var(--accent);
}
.footer-bottom p {
 font-size: 12px;
 color: rgba(255,255,255,0.5);
 margin: 0;
 line-height: 1.6;
}
/* Page-specific styles */
.page-banner {
 background: linear-gradient(135deg, #F7FAFC 0%, #EDF2F7 100%);
 border-bottom: 1px solid var(--border);
}
.page-banner h1 {
 font-size: 36px;
 font-weight: 700;
 color: var(--text-main);
 margin-bottom: 12px;
 line-height: 1.3;
}
.page-banner .banner-desc {
 font-size: 15px;
 color: var(--text-secondary);
 max-width: 780px;
 line-height: 1.8;
}
@media (max-width: 639px) {
 .page-banner h1 {
  font-size: 28px;
 }
 .page-banner .banner-desc {
  font-size: 14px;
 }
}
.card-meta {
 display: flex;
 align-items: center;
 gap: 12px;
 font-size: 12px;
 color: var(--text-tertiary);
 flex-wrap: wrap;
}
.card-meta span {
 display: inline-flex;
 align-items: center;
 gap: 4px;
}
.deep-content-wrap blockquote {
 background: var(--bg-light);
 border-left: 3px solid var(--accent);
 padding: 16px 20px;
 border-radius: 0 8px 8px 0;
 font-size: 14px;
 color: var(--text-secondary);
 margin: 20px 0;
 font-style: italic;
}
.deep-content-wrap blockquote strong {
 color: var(--primary);
 font-style: normal;
}

/* roulang page: category1 */
:root {
        --primary: #1B3D5C;
        --primary-dark: #142E45;
        --accent: #2EA87C;
        --accent-light: #E8F5F0;
        --bg-light: #EDF2F7;
        --bg-page: #F7FAFC;
        --text-main: #1A2733;
        --text-secondary: #52616F;
        --text-tertiary: #8A98A5;
        --border: #E2E9F0;
        --shadow-card: 0 4px 16px rgba(27, 61, 92, 0.06);
        --shadow-hover: 0 8px 28px rgba(27, 61, 92, 0.12);
        --radius-card: 10px;
        --radius-btn: 6px;
        --radius-tag: 4px;
        --font-cn: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        --font-num: Inter, "SF Pro Display", "PingFang SC", sans-serif;
        --transition: all 0.25s ease;
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    body {
        font-family: var(--font-cn);
        font-size: 15px;
        line-height: 1.85;
        color: var(--text-main);
        background: var(--bg-page);
        overflow-x: hidden;
        margin: 0;
        padding: 0;
    }

    a {
        color: var(--primary);
        text-decoration: none;
        transition: var(--transition);
    }

    a:hover {
        color: var(--accent);
        text-decoration: none;
    }

    a:focus,
    button:focus,
    input:focus,
    select:focus,
    textarea:focus {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
    }

    h1, h2, h3, h4, h5, h6 {
        color: var(--text-main);
        margin: 0 0 12px;
        line-height: 1.35;
    }

    h1 {
        font-size: 38px;
        font-weight: 700;
        letter-spacing: -0.5px;
    }

    h2 {
        font-size: 28px;
        font-weight: 700;
        letter-spacing: -0.3px;
    }

    h3 {
        font-size: 18px;
        font-weight: 600;
    }

    h4 {
        font-size: 16px;
        font-weight: 600;
    }

    p {
        margin: 0 0 16px;
    }

    ul {
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }

    .section-pad {
        padding: 80px 0;
    }

    .section-title {
        font-size: 32px;
        font-weight: 700;
        color: var(--text-main);
        line-height: 1.3;
        margin-bottom: 16px;
        letter-spacing: -0.5px;
    }

    .section-sub {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.8;
        max-width: 720px;
        margin-bottom: 40px;
    }

    .tag {
        display: inline-block;
        padding: 4px 10px;
        font-size: 12px;
        font-weight: 600;
        border-radius: var(--radius-tag);
        background: var(--accent-light);
        color: var(--accent);
        letter-spacing: 0.3px;
        white-space: nowrap;
    }

    .tag.primary-tag {
        background: var(--bg-light);
        color: var(--primary);
    }

    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 24px;
        border-radius: var(--radius-btn);
        font-size: 14px;
        font-weight: 600;
        font-family: var(--font-cn);
        cursor: pointer;
        transition: var(--transition);
        border: 2px solid transparent;
        line-height: 1.5;
        text-align: center;
        white-space: nowrap;
    }

    .btn-primary {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
    }

    .btn-primary:hover {
        background: var(--primary-dark);
        border-color: var(--primary-dark);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: var(--shadow-hover);
    }

    .btn-primary:active {
        transform: translateY(0);
        box-shadow: var(--shadow-card);
    }

    .btn-secondary {
        background: #fff;
        color: var(--primary);
        border-color: var(--primary);
    }

    .btn-secondary:hover {
        background: #fff;
        color: var(--accent);
        border-color: var(--accent);
        transform: translateY(-2px);
        box-shadow: var(--shadow-card);
    }

    .btn-secondary:active {
        transform: translateY(0);
        box-shadow: none;
    }

    .btn-sm {
        padding: 8px 16px;
        font-size: 13px;
    }

    .btn-link {
        background: none;
        border: none;
        color: var(--primary);
        padding: 0;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .btn-link:hover {
        color: var(--accent);
    }

    .card {
        background: #fff;
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border);
        transition: var(--transition);
        overflow: hidden;
    }

    .card:hover {
        box-shadow: var(--shadow-hover);
        border-color: var(--primary);
        transform: translateY(-4px);
    }

    .card-body {
        padding: 24px;
    }

    .card-img {
        width: 100%;
        aspect-ratio: 16/9;
        object-fit: cover;
        transition: transform 0.25s ease;
    }

    .card:hover .card-img {
        transform: scale(1.02);
    }

    .card-title {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-main);
        line-height: 1.4;
        margin-bottom: 8px;
    }

    .card-text {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 12px;
    }

    /* Header / Navigation */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(8px);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 2px 12px rgba(27, 61, 92, 0.06);
    }

    .brand-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 0;
        gap: 16px;
    }

    .brand-logo-area {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .brand-logo {
        width: 44px;
        height: 44px;
        border-radius: 10px;
        background: var(--primary);
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        font-weight: 700;
        flex-shrink: 0;
    }

    .brand-name {
        font-size: 20px;
        font-weight: 700;
        color: var(--primary);
        letter-spacing: -0.3px;
    }

    .brand-name small {
        display: block;
        font-size: 11px;
        font-weight: 400;
        color: var(--text-tertiary);
        letter-spacing: 0.5px;
    }

    .brand-actions {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .brand-date {
        font-size: 13px;
        color: var(--text-tertiary);
        font-family: var(--font-num);
    }

    .nav-icon-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 4px;
        padding: 10px 0 12px;
        border-top: 1px solid var(--border);
    }

    .nav-icon-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 6px;
        padding: 8px 14px;
        border-radius: 8px;
        font-size: 12px;
        font-weight: 500;
        color: var(--text-secondary);
        transition: var(--transition);
        min-width: 72px;
    }

    .nav-icon-item i {
        font-size: 22px;
        color: var(--text-tertiary);
        transition: var(--transition);
    }

    .nav-icon-item:hover {
        background: var(--bg-light);
        color: var(--primary);
    }

    .nav-icon-item:hover i {
        color: var(--accent);
    }

    .nav-icon-item.active {
        background: var(--accent-light);
        color: var(--primary);
        font-weight: 700;
    }

    .nav-icon-item.active i {
        color: var(--primary);
    }

    /* Breadcrumb */
    .breadcrumb-bar {
        background: #fff;
        border-bottom: 1px solid var(--border);
        padding: 14px 0;
    }

    .breadcrumb-list {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        flex-wrap: wrap;
    }

    .breadcrumb-list a {
        color: var(--text-tertiary);
    }

    .breadcrumb-list a:hover {
        color: var(--accent);
    }

    .breadcrumb-list .current {
        color: var(--primary);
        font-weight: 600;
    }

    .breadcrumb-list .sep {
        color: var(--text-tertiary);
        font-size: 11px;
    }

    /* Category Hero */
    .category-hero {
        background: var(--bg-light);
        padding: 56px 0 48px;
        position: relative;
        overflow: hidden;
    }

    .category-hero::before {
        content: '';
        position: absolute;
        top: 0;
        right: -120px;
        width: 420px;
        height: 420px;
        border-radius: 50%;
        background: rgba(27, 61, 92, 0.04);
        pointer-events: none;
    }

    .category-hero .container {
        position: relative;
        z-index: 1;
    }

    .category-hero h1 {
        font-size: 36px;
        font-weight: 700;
        margin-bottom: 12px;
    }

    .category-hero .hero-sub {
        font-size: 15px;
        color: var(--text-secondary);
        max-width: 680px;
        line-height: 1.8;
    }

    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 14px;
        background: var(--primary);
        color: #fff;
        border-radius: 20px;
        font-size: 12px;
        font-weight: 600;
        margin-bottom: 16px;
    }

    /* Alternating list */
    .alt-list-section {
        background: #fff;
    }

    .alt-list-grid {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 32px;
    }

    .alt-list-main {
        display: flex;
        flex-direction: column;
        gap: 28px;
    }

    .alt-item {
        display: grid;
        grid-template-columns: 260px 1fr;
        gap: 24px;
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-card);
        overflow: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow-card);
    }

    .alt-item:hover {
        box-shadow: var(--shadow-hover);
        border-color: var(--primary);
    }

    .alt-item.reverse {
        grid-template-columns: 1fr 260px;
    }

    .alt-item-img {
        aspect-ratio: 4/3;
        object-fit: cover;
        width: 100%;
        height: 100%;
        min-height: 180px;
    }

    .alt-item-body {
        padding: 24px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .alt-item-tag {
        margin-bottom: 8px;
    }

    .alt-item-title {
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 10px;
        color: var(--text-main);
    }

    .alt-item-text {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.75;
        margin-bottom: 14px;
    }

    .alt-item-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 12px;
        color: var(--text-tertiary);
    }

    /* Sidebar data cards */
    .sidebar-data {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .data-card {
        background: var(--bg-light);
        border-radius: var(--radius-card);
        padding: 24px;
        border-left: 3px solid var(--primary);
    }

    .data-card h3 {
        font-size: 15px;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 12px;
    }

    .data-card-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 10px 0;
        border-bottom: 1px solid var(--border);
    }

    .data-card-item:last-child {
        border-bottom: none;
    }

    .data-card-item .label {
        font-size: 13px;
        color: var(--text-secondary);
    }

    .data-card-item .value {
        font-size: 15px;
        font-weight: 700;
        color: var(--primary);
        font-family: var(--font-num);
    }

    .data-card-item .value.accent {
        color: var(--accent);
    }

    /* Info strip */
    .info-strip {
        background: var(--primary);
        padding: 32px 0;
        border-radius: var(--radius-card);
        margin-top: 28px;
    }

    .info-strip-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    .info-strip-item {
        text-align: center;
        padding: 12px;
    }

    .info-strip-item .num {
        font-size: 30px;
        font-weight: 700;
        color: #fff;
        font-family: var(--font-num);
        line-height: 1.2;
    }

    .info-strip-item .label {
        font-size: 13px;
        color: rgba(255, 255, 255, 0.75);
        margin-top: 4px;
    }

    /* Section with light bg */
    .section-bg-light {
        background: var(--bg-light);
    }

    /* Use cases */
    .use-case-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
        margin-top: 32px;
    }

    .use-case-card {
        background: #fff;
        border-radius: var(--radius-card);
        padding: 28px;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-card);
        transition: var(--transition);
    }

    .use-case-card:hover {
        box-shadow: var(--shadow-hover);
        border-color: var(--primary);
        transform: translateY(-4px);
    }

    .use-case-icon {
        width: 48px;
        height: 48px;
        border-radius: 10px;
        background: var(--accent-light);
        color: var(--accent);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        margin-bottom: 16px;
    }

    .use-case-card h3 {
        font-size: 16px;
        margin-bottom: 8px;
    }

    .use-case-card p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 0;
    }

    /* Process */
    .process-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        margin-top: 32px;
        counter-reset: step;
    }

    .process-step {
        background: #fff;
        border-radius: var(--radius-card);
        padding: 28px 20px;
        text-align: center;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-card);
        position: relative;
        transition: var(--transition);
    }

    .process-step:hover {
        box-shadow: var(--shadow-hover);
        border-color: var(--accent);
    }

    .process-step::before {
        content: counter(step);
        counter-increment: step;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--primary);
        color: #fff;
        font-size: 16px;
        font-weight: 700;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 14px;
        font-family: var(--font-num);
    }

    .process-step h3 {
        font-size: 15px;
        margin-bottom: 8px;
    }

    .process-step p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.65;
        margin-bottom: 0;
    }

    /* Deep content */
    .deep-content {
        background: #fff;
    }

    .deep-content-inner {
        max-width: 820px;
        margin: 0 auto;
    }

    .deep-content h4 {
        font-size: 18px;
        font-weight: 700;
        color: var(--primary);
        margin: 28px 0 12px;
    }

    .deep-content p {
        font-size: 15px;
        color: var(--text-main);
        line-height: 1.9;
        margin-bottom: 18px;
    }

    .deep-content blockquote {
        background: var(--bg-light);
        border-left: 4px solid var(--accent);
        padding: 20px 24px;
        border-radius: 0 var(--radius-card) var(--radius-card) 0;
        margin: 24px 0;
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.8;
    }

    /* FAQ */
    .faq-section {
        background: var(--bg-light);
    }

    .faq-list {
        max-width: 780px;
        margin: 0 auto;
    }

    .faq-item {
        background: #fff;
        border-radius: var(--radius-card);
        margin-bottom: 12px;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        transition: var(--transition);
    }

    .faq-item:hover {
        border-color: var(--primary);
    }

    .faq-question {
        padding: 18px 24px;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-main);
        transition: var(--transition);
        background: none;
        border: none;
        width: 100%;
        text-align: left;
        font-family: var(--font-cn);
    }

    .faq-question:hover {
        color: var(--primary);
    }

    .faq-question .faq-icon {
        font-size: 14px;
        color: var(--text-tertiary);
        transition: var(--transition);
        flex-shrink: 0;
    }

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        padding: 0 24px;
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.8;
    }

    .faq-item.open .faq-answer {
        max-height: 200px;
        padding: 0 24px 20px;
    }

    .faq-item.open .faq-question .faq-icon {
        transform: rotate(180deg);
        color: var(--accent);
    }

    /* CTA / Contact */
    .cta-section {
        background: #fff;
    }

    .cta-grid {
        display: grid;
        grid-template-columns: 3fr 2fr;
        gap: 40px;
        align-items: start;
    }

    .cta-form {
        background: #fff;
        border-radius: var(--radius-card);
        padding: 32px;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-card);
    }

    .cta-form h3 {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .form-group {
        margin-bottom: 16px;
    }

    .form-group label {
        display: block;
        font-size: 13px;
        font-weight: 600;
        color: var(--text-main);
        margin-bottom: 6px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        width: 100%;
        padding: 12px 14px;
        border: 1px solid var(--border);
        border-radius: var(--radius-btn);
        font-size: 14px;
        font-family: var(--font-cn);
        background: #fff;
        color: var(--text-main);
        transition: var(--transition);
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
        outline: 2px solid var(--primary);
        outline-offset: 0;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(27, 61, 92, 0.1);
    }

    .cta-info {
        background: var(--bg-light);
        border-radius: var(--radius-card);
        padding: 32px;
    }

    .cta-info h3 {
        font-size: 18px;
        margin-bottom: 16px;
    }

    .cta-info ul li {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: var(--text-secondary);
        padding: 10px 0;
        border-bottom: 1px solid var(--border);
    }

    .cta-info ul li:last-child {
        border-bottom: none;
    }

    .cta-info ul li i {
        color: var(--accent);
        font-size: 16px;
        width: 20px;
        text-align: center;
    }

    /* Footer */
    .site-footer {
        background: var(--primary);
        color: rgba(255, 255, 255, 0.75);
        padding: 56px 0 24px;
        margin-top: 0;
    }

    .site-footer h4 {
        color: #fff;
        font-size: 15px;
        font-weight: 700;
        margin-bottom: 16px;
    }

    .site-footer a {
        color: rgba(255, 255, 255, 0.7);
        font-size: 13px;
        transition: var(--transition);
    }

    .site-footer a:hover {
        color: #fff;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 3fr 2fr 2fr 3fr;
        gap: 32px;
    }

    .footer-brand p {
        font-size: 13px;
        line-height: 1.7;
        margin-top: 8px;
    }

    .footer-brand .brand-logo {
        background: rgba(255, 255, 255, 0.15);
        color: #fff;
    }

    .footer-brand h4 {
        color: #fff;
    }

    .footer-col ul li {
        margin-bottom: 8px;
    }

    .footer-subscribe p {
        font-size: 13px;
        line-height: 1.7;
    }

    .subscribe-form {
        display: flex;
        gap: 8px;
        margin-top: 16px;
    }

    .subscribe-form input {
        flex: 1;
        padding: 10px 14px;
        border: 1px solid rgba(255, 255, 255, 0.25);
        border-radius: var(--radius-btn);
        font-size: 13px;
        font-family: var(--font-cn);
        background: rgba(255, 255, 255, 0.1);
        color: #fff;
    }

    .subscribe-form input::placeholder {
        color: rgba(255, 255, 255, 0.5);
    }

    .subscribe-form input:focus {
        outline: 2px solid #fff;
        outline-offset: 0;
    }

    .subscribe-form .btn-primary {
        background: #fff;
        color: var(--primary);
        border-color: #fff;
    }

    .subscribe-form .btn-primary:hover {
        background: var(--accent);
        color: #fff;
        border-color: var(--accent);
    }

    .footer-bottom {
        margin-top: 40px;
        padding-top: 20px;
        border-top: 1px solid rgba(255, 255, 255, 0.15);
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        justify-content: space-between;
        align-items: center;
        font-size: 12px;
        color: rgba(255, 255, 255, 0.55);
    }

    .footer-bottom p {
        margin: 0;
    }

    .footer-links {
        display: flex;
        gap: 8px;
        align-items: center;
    }

    .footer-links span {
        color: rgba(255, 255, 255, 0.4);
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .alt-list-grid {
            grid-template-columns: 1fr;
        }
        .sidebar-data {
            flex-direction: row;
            flex-wrap: wrap;
        }
        .data-card {
            flex: 1;
            min-width: 240px;
        }
        .use-case-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .process-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .cta-grid {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 768px) {
        .section-pad {
            padding: 48px 0;
        }
        .section-title {
            font-size: 24px;
        }
        h1 {
            font-size: 28px;
        }
        .category-hero h1 {
            font-size: 26px;
        }
        .alt-item,
        .alt-item.reverse {
            grid-template-columns: 1fr;
        }
        .alt-item-img {
            min-height: 200px;
        }
        .info-strip-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }
        .use-case-grid {
            grid-template-columns: 1fr;
        }
        .process-grid {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .brand-date {
            display: none;
        }
        .nav-icon-grid {
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            gap: 2px;
        }
        .nav-icon-grid::-webkit-scrollbar {
            display: none;
        }
        .nav-icon-item {
            min-width: 60px;
            padding: 8px 10px;
            flex-shrink: 0;
        }
        .container {
            padding: 0 16px;
        }
        .alt-item-body {
            padding: 20px;
        }
        .cta-form,
        .cta-info {
            padding: 24px;
        }
    }

    @media (max-width: 520px) {
        .brand-actions .btn {
            padding: 8px 12px;
            font-size: 12px;
        }
        .brand-logo {
            width: 36px;
            height: 36px;
            font-size: 18px;
        }
        .brand-name {
            font-size: 17px;
        }
        .info-strip-item .num {
            font-size: 24px;
        }
        .info-strip-item .label {
            font-size: 11px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
            gap: 8px;
        }
    }

/* roulang page: category5 */
:root {
            --primary: #1B3D5C;
            --primary-dark: #142E45;
            --accent: #2EA87C;
            --accent-light: #E8F5F0;
            --bg-light: #EDF2F7;
            --bg-page: #F7FAFC;
            --text-main: #1A2733;
            --text-secondary: #52616F;
            --text-tertiary: #8A98A5;
            --border: #E2E9F0;
            --shadow-card: 0 4px 16px rgba(27, 61, 92, 0.06);
            --shadow-hover: 0 8px 28px rgba(27, 61, 92, 0.12);
            --radius-card: 10px;
            --radius-btn: 6px;
            --radius-tag: 4px;
            --font-cn: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: Inter, "SF Pro Display", "PingFang SC", sans-serif;
            --transition: all 0.25s ease;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-main);
            background: var(--bg-page);
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (min-width: 75em) {
            .container {
                max-width: 1400px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        .section-pad {
            padding: 80px 0;
        }

        @media (max-width: 640px) {
            .section-pad {
                padding: 48px 0;
            }
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-sub {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 40px;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
            .section-sub {
                font-size: 14px;
                margin-bottom: 28px;
            }
        }

        .tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-tag);
            background: var(--accent-light);
            color: var(--accent);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .tag.primary-tag {
            background: var(--bg-light);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            font-family: var(--font-cn);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.5;
            text-align: center;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: #fff;
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }

        .btn-link {
            background: none;
            border: none;
            color: var(--primary);
            padding: 0;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-link:hover {
            color: var(--accent);
        }

        .card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .card-body {
            padding: 24px;
        }

        @media (max-width: 640px) {
            .card-body {
                padding: 16px;
            }
        }

        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: transform 0.25s ease;
        }

        .card:hover .card-img {
            transform: scale(1.02);
        }

        .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* 导航样式 */
        .site-header {
            background: #fff;
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(27, 61, 92, 0.04);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            gap: 16px;
        }

        .brand-logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            min-width: 0;
        }

        .brand-logo {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-date {
            font-size: 13px;
            color: var(--text-tertiary);
            white-space: nowrap;
        }

        .nav-icon-grid {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 8px 0;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
        }

        .nav-icon-grid::-webkit-scrollbar {
            height: 4px;
        }

        .nav-icon-grid::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 2px;
        }

        .nav-icon-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: var(--transition);
            white-space: nowrap;
            flex-shrink: 0;
            border: 1px solid transparent;
            min-width: 72px;
            text-align: center;
        }

        .nav-icon-item i {
            font-size: 22px;
            color: var(--text-tertiary);
            transition: var(--transition);
        }

        .nav-icon-item span {
            font-size: 12px;
            letter-spacing: 0.3px;
        }

        .nav-icon-item:hover {
            color: var(--primary);
            background: var(--bg-light);
            border-color: var(--border);
        }

        .nav-icon-item:hover i {
            color: var(--accent);
        }

        .nav-icon-item.active {
            color: var(--primary);
            background: var(--accent-light);
            border-color: var(--accent);
            font-weight: 700;
        }

        .nav-icon-item.active i {
            color: var(--accent);
        }

        @media (max-width: 640px) {
            .brand-row {
                flex-wrap: wrap;
            }
            .brand-actions {
                gap: 6px;
            }
            .brand-date {
                display: none;
            }
            .nav-icon-item {
                padding: 6px 10px;
                min-width: 60px;
            }
            .nav-icon-item i {
                font-size: 18px;
            }
            .nav-icon-item span {
                font-size: 11px;
            }
        }

        /* 面包屑 */
        .breadcrumb-nav {
            padding: 16px 0;
            font-size: 13px;
            color: var(--text-tertiary);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
        }

        .breadcrumb-nav a:hover {
            color: var(--accent);
        }

        .breadcrumb-nav .separator {
            color: var(--border);
        }

        .breadcrumb-nav .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* 分类页头 */
        .category-hero {
            padding: 40px 0 32px;
            border-bottom: 1px solid var(--border);
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .category-hero .category-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.85;
        }

        @media (max-width: 640px) {
            .category-hero {
                padding: 24px 0 20px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero .category-desc {
                font-size: 14px;
            }
        }

        /* 精选头图 */
        .featured-image-section {
            padding: 32px 0 48px;
        }

        .featured-image-wrap {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .featured-image-wrap img {
            width: 100%;
            aspect-ratio: 21/9;
            object-fit: cover;
        }

        .featured-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 32px 28px 24px;
            background: linear-gradient(to top, rgba(20, 46, 69, 0.85) 0%, rgba(20, 46, 69, 0.45) 55%, transparent 100%);
            color: #fff;
        }

        .featured-overlay h2 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .featured-overlay p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
            margin: 0;
            max-width: 600px;
            line-height: 1.7;
        }

        @media (max-width: 640px) {
            .featured-image-wrap img {
                aspect-ratio: 16/9;
            }
            .featured-overlay {
                padding: 16px;
            }
            .featured-overlay h2 {
                font-size: 17px;
            }
            .featured-overlay p {
                font-size: 12px;
                line-height: 1.5;
            }
        }

        /* 正文区 */
        .article-body {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 40px;
            margin-bottom: 48px;
        }

        .article-body h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            margin-top: 32px;
            line-height: 1.45;
        }

        .article-body h2:first-child {
            margin-top: 0;
        }

        .article-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
            margin-top: 24px;
        }

        .article-body p {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-light);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 8px 8px 0;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .article-body blockquote strong {
            color: var(--primary);
        }

        @media (max-width: 640px) {
            .article-body {
                padding: 20px 16px;
                margin-bottom: 28px;
            }
            .article-body h2 {
                font-size: 19px;
            }
            .article-body h3 {
                font-size: 16px;
            }
            .article-body p {
                font-size: 14px;
                line-height: 1.8;
            }
            .article-body blockquote {
                padding: 12px 16px;
                font-size: 13px;
            }
        }

        /* 数据表格 */
        .data-table-section {
            padding: 48px 0;
        }

        .data-table-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 28px;
            overflow-x: auto;
        }

        .data-table-card table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            min-width: 640px;
        }

        .data-table-card th {
            background: var(--bg-light);
            color: var(--primary);
            font-weight: 700;
            font-size: 13px;
            text-align: left;
            padding: 12px 14px;
            border-bottom: 2px solid var(--border);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .data-table-card td {
            padding: 12px 14px;
            border-bottom: 1px solid var(--border);
            color: var(--text-main);
            vertical-align: middle;
        }

        .data-table-card tr:last-child td {
            border-bottom: none;
        }

        .data-table-card tr:hover td {
            background: var(--bg-page);
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
        }

        .status-badge.hot {
            background: #FEF3E2;
            color: #E8883C;
        }

        .status-badge.progress {
            background: var(--accent-light);
            color: var(--accent);
        }

        .status-badge.done {
            background: var(--bg-light);
            color: var(--primary);
        }

        @media (max-width: 640px) {
            .data-table-card {
                padding: 16px;
            }
            .data-table-card table {
                min-width: 560px;
                font-size: 12px;
            }
            .data-table-card th,
            .data-table-card td {
                padding: 8px 10px;
            }
        }

        /* 相关阅读 */
        .related-reads {
            padding: 48px 0 56px;
        }

        .related-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }

        .related-item:last-child {
            border-bottom: none;
        }

        .related-item:hover {
            padding-left: 8px;
        }

        .related-num {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: var(--border);
            min-width: 42px;
            text-align: center;
            line-height: 1;
        }

        .related-content h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 4px;
        }

        .related-content p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0 0 4px;
        }

        .related-meta {
            font-size: 12px;
            color: var(--text-tertiary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .related-meta .tag {
            font-size: 11px;
            padding: 2px 8px;
        }

        /* 服务提示条 */
        .service-strip {
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-card);
            padding: 28px 32px;
            margin: 32px 0 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .service-strip h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .service-strip p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            margin: 0;
            line-height: 1.7;
            max-width: 600px;
        }

        .service-strip .btn {
            flex-shrink: 0;
        }

        @media (max-width: 640px) {
            .service-strip {
                padding: 20px;
                flex-direction: column;
                align-items: flex-start;
            }
            .service-strip .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-light);
            padding: 56px 0;
        }

        .accordion {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .accordion-item {
            border-bottom: 1px solid var(--border);
        }

        .accordion-item:last-child {
            border-bottom: none;
        }

        .accordion-title {
            background: #fff;
            color: var(--text-main);
            cursor: pointer;
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            width: 100%;
            text-align: left;
            border: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: var(--transition);
            font-family: var(--font-cn);
        }

        .accordion-title:hover {
            background: var(--bg-page);
            color: var(--primary);
        }

        .accordion-title i {
            font-size: 16px;
            color: var(--text-tertiary);
            transition: var(--transition);
        }

        .accordion-title.active i {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .accordion-title.active {
            color: var(--primary);
            font-weight: 700;
        }

        .accordion-content {
            display: none;
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .accordion-content.show {
            display: block;
        }

        @media (max-width: 640px) {
            .accordion-title {
                padding: 14px 16px;
                font-size: 14px;
            }
            .accordion-content {
                padding: 0 16px 16px;
                font-size: 13px;
            }
        }

        /* CTA/联系 */
        .cta-section {
            padding: 64px 0 80px;
        }

        .cta-wrapper {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 40px;
            display: grid;
            grid-template-columns: 3fr 2fr;
            gap: 40px;
        }

        .cta-form .form-group {
            margin-bottom: 16px;
        }

        .cta-form label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
            display: block;
        }

        .cta-form input,
        .cta-form select,
        .cta-form textarea {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: 6px;
            font-size: 14px;
            font-family: var(--font-cn);
            color: var(--text-main);
            background: #fff;
            transition: var(--transition);
        }

        .cta-form input:focus,
        .cta-form select:focus,
        .cta-form textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 61, 92, 0.1);
            outline: none;
        }

        .cta-form textarea {
            min-height: 100px;
            resize: vertical;
        }

        .cta-info h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .cta-info p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .cta-info .contact-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 8px 0;
        }

        .cta-info .contact-item i {
            color: var(--accent);
            width: 20px;
            text-align: center;
        }

        @media (max-width: 1024px) {
            .cta-wrapper {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 640px) {
            .cta-wrapper {
                padding: 24px 16px;
            }
        }

        /* 页脚 */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 3fr 2fr 2fr 3fr;
            gap: 32px;
            padding-bottom: 40px;
        }

        .footer-brand h4,
        .footer-col h4,
        .footer-subscribe h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-subscribe p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .subscribe-form {
            display: flex;
            gap: 8px;
        }

        .subscribe-form input {
            flex: 1;
            padding: 10px 12px;
            border: 1px solid var(--border);
            border-radius: 6px;
            font-size: 13px;
            font-family: var(--font-cn);
            min-width: 0;
        }

        .subscribe-form input:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(27, 61, 92, 0.1);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer-links {
            font-size: 13px;
            color: var(--text-tertiary);
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--text-tertiary);
            font-size: 13px;
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-tertiary);
            margin: 0;
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form .btn {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #1B3D5C;
            --primary-dark: #142E45;
            --accent: #2EA87C;
            --accent-light: #E8F5F0;
            --bg-light: #EDF2F7;
            --bg-page: #F7FAFC;
            --text-main: #1A2733;
            --text-secondary: #52616F;
            --text-tertiary: #8A98A5;
            --border: #E2E9F0;
            --shadow-card: 0 4px 16px rgba(27, 61, 92, 0.06);
            --shadow-hover: 0 8px 28px rgba(27, 61, 92, 0.12);
            --radius-card: 10px;
            --radius-btn: 6px;
            --radius-tag: 4px;
            --font-cn: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: Inter, "SF Pro Display", "PingFang SC", sans-serif;
            --transition: all 0.25s ease;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-main);
            background: var(--bg-page);
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent);
            text-decoration: none;
        }

        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (min-width: 1400px) {
            .container {
                max-width: 1400px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        .section-pad {
            padding: 80px 0;
        }

        @media (max-width: 640px) {
            .section-pad {
                padding: 48px 0;
            }
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-sub {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 40px;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
            .section-sub {
                font-size: 14px;
                margin-bottom: 28px;
            }
        }

        .tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-tag);
            background: var(--accent-light);
            color: var(--accent);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .tag.primary-tag {
            background: var(--bg-light);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            font-family: var(--font-cn);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.5;
            text-align: center;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: #fff;
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }

        .card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .card-body {
            padding: 24px;
        }

        @media (max-width: 640px) {
            .card-body {
                padding: 16px;
            }
        }

        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: transform 0.25s ease;
        }

        .card:hover .card-img {
            transform: scale(1.02);
        }

        .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(27, 61, 92, 0.04);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 16px;
        }

        .brand-logo {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            background: var(--primary);
            color: #fff;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: -1px;
        }

        .brand-name {
            font-size: 21px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            line-height: 1.2;
        }

        .brand-tagline {
            font-size: 12px;
            color: var(--text-tertiary);
            line-height: 1.3;
        }

        .brand-info {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-action-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            padding: 8px 14px;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }

        .brand-action-btn:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: #fff;
        }

        .nav-icon-grid {
            display: flex;
            align-items: center;
            gap: 2px;
            padding: 6px 0 12px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--border) transparent;
        }

        .nav-icon-grid::-webkit-scrollbar {
            height: 4px;
        }

        .nav-icon-grid::-webkit-scrollbar-track {
            background: transparent;
        }

        .nav-icon-grid::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 2px;
        }

        .nav-icon-item {
            flex-shrink: 0;
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            padding: 8px 14px;
            border-radius: 8px;
            border: 1px solid transparent;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            min-width: 70px;
            text-align: center;
        }

        .nav-icon-item i {
            font-size: 20px;
            color: var(--text-tertiary);
            transition: var(--transition);
        }

        .nav-icon-item:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        .nav-icon-item:hover i {
            color: var(--accent);
        }

        .nav-icon-item.active {
            background: var(--bg-light);
            color: var(--primary);
            border-color: var(--border);
            font-weight: 700;
        }

        .nav-icon-item.active i {
            color: var(--primary);
        }

        @media (max-width: 640px) {
            .brand-actions .brand-action-btn span {
                display: none;
            }
            .brand-name {
                font-size: 17px;
            }
            .brand-tagline {
                display: none;
            }
            .nav-icon-item {
                min-width: 58px;
                padding: 6px 10px;
                font-size: 11px;
            }
            .nav-icon-item i {
                font-size: 17px;
            }
        }

        /* Breadcrumb */
        .breadcrumb-nav {
            padding: 16px 0 0;
            font-size: 13px;
            color: var(--text-tertiary);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
        }

        .breadcrumb-nav a:hover {
            color: var(--accent);
        }

        .breadcrumb-sep {
            color: var(--text-tertiary);
        }

        .breadcrumb-current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Page Hero */
        .page-hero {
            padding: 40px 0 24px;
        }

        .page-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .page-hero .hero-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 800px;
        }

        @media (max-width: 640px) {
            .page-hero {
                padding: 28px 0 16px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero .hero-desc {
                font-size: 14px;
            }
        }

        /* Timeline */
        .timeline-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .timeline-wrap {
            display: flex;
            align-items: stretch;
            gap: 0;
            position: relative;
            padding: 12px 0;
        }

        .timeline-line {
            position: absolute;
            top: 38px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--border);
            z-index: 0;
            display: none;
        }

        .timeline-step {
            flex: 1;
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0 8px;
            min-width: 100px;
        }

        .timeline-dot {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #fff;
            border: 2px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-tertiary);
            margin: 0 auto 10px;
            transition: var(--transition);
            position: relative;
            z-index: 1;
        }

        .timeline-step.active .timeline-dot {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .timeline-step.completed .timeline-dot {
            background: var(--accent-light);
            border-color: var(--accent);
            color: var(--accent);
        }

        .timeline-step h3 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .timeline-step p {
            font-size: 12px;
            color: var(--text-tertiary);
            line-height: 1.5;
            margin: 0;
        }

        @media (min-width: 769px) {
            .timeline-line {
                display: block;
            }
        }

        @media (max-width: 768px) {
            .timeline-wrap {
                flex-direction: column;
                gap: 20px;
                padding: 8px 0;
            }
            .timeline-step {
                display: flex;
                align-items: center;
                text-align: left;
                gap: 14px;
                min-width: 0;
                padding: 0;
            }
            .timeline-dot {
                flex-shrink: 0;
                margin: 0;
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
            .timeline-line {
                display: none;
            }
        }

        /* Report Cards */
        .report-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        @media (max-width: 1024px) and (min-width: 641px) {
            .report-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .report-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        .report-card .card-img-wrap {
            position: relative;
            overflow: hidden;
        }

        .report-card .card-img-wrap .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            background: rgba(27, 61, 92, 0.88);
            color: #fff;
            backdrop-filter: blur(4px);
        }

        .report-card .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }

        .report-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-tertiary);
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .report-meta i {
            font-size: 12px;
            color: var(--text-tertiary);
            margin-right: 4px;
        }

        .report-card .card-body {
            padding: 20px;
        }

        .report-card .card-title {
            font-size: 17px;
        }

        .report-card .card-text {
            font-size: 13px;
            -webkit-line-clamp: 2;
        }

        /* Quote Block */
        .quote-section {
            background: var(--primary);
            padding: 64px 0;
        }

        .quote-block {
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
            color: #fff;
        }

        .quote-icon {
            font-size: 40px;
            color: var(--accent);
            margin-bottom: 16px;
            display: block;
        }

        .quote-text {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.7;
            letter-spacing: 0.3px;
            margin-bottom: 20px;
        }

        .quote-author {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
        }

        .quote-author span {
            color: var(--accent);
            font-weight: 600;
        }

        @media (max-width: 640px) {
            .quote-section {
                padding: 40px 0;
            }
            .quote-text {
                font-size: 16px;
            }
        }

        /* Deep Content */
        .deep-content {
            font-size: 15px;
            line-height: 1.9;
            color: var(--text-main);
        }

        .deep-content h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin: 28px 0 12px;
            line-height: 1.4;
        }

        .deep-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin: 22px 0 10px;
            line-height: 1.4;
        }

        .deep-content p {
            margin-bottom: 14px;
        }

        .deep-content ul,
        .deep-content ol {
            margin: 12px 0 16px;
            padding-left: 24px;
        }

        .deep-content li {
            margin-bottom: 8px;
        }

        .deep-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-light);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
            color: var(--text-secondary);
        }

        .deep-content blockquote p {
            margin: 0;
        }

        /* Stats Bar */
        .stats-bar-section {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 24px;
        }

        .stats-bar-grid {
            display: flex;
            align-items: stretch;
            gap: 0;
        }

        .stats-bar-item {
            flex: 1;
            text-align: center;
            padding: 8px 12px;
            border-right: 1px solid var(--border);
        }

        .stats-bar-item:last-child {
            border-right: none;
        }

        .stats-bar-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-num);
            line-height: 1.3;
        }

        .stats-bar-label {
            font-size: 13px;
            color: var(--text-tertiary);
            line-height: 1.5;
        }

        @media (max-width: 768px) {
            .stats-bar-grid {
                flex-wrap: wrap;
            }
            .stats-bar-item {
                flex: 1 0 50%;
                border-right: none;
                border-bottom: 1px solid var(--border);
                padding: 16px 8px;
            }
            .stats-bar-item:nth-child(even) {
                border-left: 1px solid var(--border);
            }
            .stats-bar-item:nth-last-child(-n+2) {
                border-bottom: none;
            }
            .stats-bar-value {
                font-size: 24px;
            }
        }

        @media (max-width: 640px) {
            .stats-bar-item {
                flex: 1 0 100%;
                border-left: none !important;
                border-bottom: 1px solid var(--border);
            }
            .stats-bar-item:last-child {
                border-bottom: none;
            }
        }

        /* Feature Highlights */
        .feature-highlight-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .feature-highlight-item {
            text-align: center;
            padding: 20px 14px;
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .feature-highlight-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .feature-highlight-item i {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 10px;
            display: block;
        }

        .feature-highlight-item h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .feature-highlight-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        @media (max-width: 1024px) and (min-width: 641px) {
            .feature-highlight-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .feature-highlight-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-light);
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border-radius: 8px;
            border: 1px solid var(--border);
            margin-bottom: 10px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            gap: 12px;
            user-select: none;
            background: #fff;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-cn);
        }

        .faq-question i {
            font-size: 14px;
            color: var(--text-tertiary);
            transition: transform 0.25s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 16px;
        }

        .faq-item.open {
            border-color: var(--primary);
        }

        /* CTA Section */
        .cta-section {
            background: #fff;
            border-top: 1px solid var(--border);
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 3fr 2fr;
            gap: 40px;
            align-items: start;
        }

        .cta-form .form-group {
            margin-bottom: 16px;
        }

        .cta-form label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .cta-form input,
        .cta-form select,
        .cta-form textarea {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-family: var(--font-cn);
            background: #fff;
            color: var(--text-main);
            transition: var(--transition);
        }

        .cta-form input:focus,
        .cta-form select:focus,
        .cta-form textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 61, 92, 0.08);
            outline: none;
        }

        .cta-form textarea {
            min-height: 100px;
            resize: vertical;
        }

        .cta-info {
            background: var(--bg-light);
            border-radius: var(--radius-card);
            padding: 24px;
        }

        .cta-info h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .cta-info-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .cta-info-item i {
            color: var(--accent);
            font-size: 16px;
            flex-shrink: 0;
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* Footer */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 3fr 2fr 2fr 3fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .brand-logo {
            width: 38px;
            height: 38px;
            font-size: 18px;
            background: var(--primary);
            color: #fff;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .footer-brand h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin: 8px 0 4px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
        }

        .footer-subscribe h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .footer-subscribe p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .subscribe-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .subscribe-form input {
            flex: 1;
            min-width: 160px;
            padding: 8px 12px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 13px;
            font-family: var(--font-cn);
            transition: var(--transition);
        }

        .subscribe-form input:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(27, 61, 92, 0.06);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
        }

        .footer-links {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 8px;
            font-size: 13px;
        }

        .footer-links a {
            color: var(--text-tertiary);
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-links span {
            color: var(--text-tertiary);
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-tertiary);
            margin-bottom: 4px;
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer {
                padding: 32px 0 16px;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #1B3D5C;
            --primary-dark: #142E45;
            --accent: #2EA87C;
            --accent-light: #E8F5F0;
            --bg-light: #EDF2F7;
            --bg-page: #F7FAFC;
            --text-main: #1A2733;
            --text-secondary: #52616F;
            --text-tertiary: #8A98A5;
            --border: #E2E9F0;
            --shadow-card: 0 4px 16px rgba(27, 61, 92, 0.06);
            --shadow-hover: 0 8px 28px rgba(27, 61, 92, 0.12);
            --radius-card: 10px;
            --radius-btn: 6px;
            --radius-tag: 4px;
            --font-cn: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: Inter, "SF Pro Display", "PingFang SC", sans-serif;
            --transition: all 0.25s ease;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-main);
            background: var(--bg-page);
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-pad {
            padding: 72px 0;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .section-sub {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 36px;
        }

        .tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-tag);
            background: var(--accent-light);
            color: var(--accent);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .tag.primary-tag {
            background: var(--bg-light);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            font-family: var(--font-cn);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.5;
            text-align: center;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: #fff;
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }
        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }

        .card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .card-body {
            padding: 24px;
        }
        .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: transform 0.25s ease;
        }
        .card:hover .card-img {
            transform: scale(1.02);
        }

        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 8px rgba(27, 61, 92, 0.04);
        }
        .brand-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            flex-wrap: wrap;
            gap: 12px;
        }
        .brand-logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .brand-logo {
            width: 42px;
            height: 42px;
            border-radius: 8px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 20px;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 1px;
        }
        .brand-tools {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .brand-tools .today-date {
            font-size: 13px;
            color: var(--text-tertiary);
            white-space: nowrap;
        }
        .nav-icon-grid {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 8px 0 12px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-icon-grid::-webkit-scrollbar {
            display: none;
        }
        .nav-icon-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .nav-icon-item i {
            font-size: 20px;
            color: var(--text-tertiary);
            transition: var(--transition);
        }
        .nav-icon-item:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .nav-icon-item:hover i {
            color: var(--accent);
        }
        .nav-icon-item.active {
            background: var(--accent-light);
            color: var(--primary);
            border-color: var(--border);
        }
        .nav-icon-item.active i {
            color: var(--primary);
        }

        /* Breadcrumb Banner */
        .page-banner {
            background: linear-gradient(135deg, #F0F5FA 0%, #E8EFF6 100%);
            border-bottom: 1px solid var(--border);
            padding: 40px 0 48px;
            position: relative;
            overflow: hidden;
        }
        .page-banner::after {
            content: "";
            position: absolute;
            right: -60px;
            top: -60px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(46, 168, 124, 0.08);
            pointer-events: none;
        }
        .breadcrumb-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-tertiary);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .breadcrumb-row a {
            color: var(--primary);
        }
        .breadcrumb-row .sep {
            color: var(--text-tertiary);
        }
        .page-banner h1 {
            font-size: 38px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.25;
        }
        .page-banner .banner-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.85;
            margin-bottom: 20px;
        }
        .banner-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-tertiary);
            flex-wrap: wrap;
        }
        .banner-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .banner-meta i {
            color: var(--accent);
        }

        /* Filter Bar */
        .filter-section {
            padding: 20px 0 8px;
        }
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
        }
        .filter-btn {
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--bg-light);
        }
        .filter-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* Content List + Sidebar */
        .content-list-section {
            padding: 16px 0 56px;
        }
        .tactic-list-item {
            display: flex;
            gap: 20px;
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 18px;
            margin-bottom: 16px;
            transition: var(--transition);
            flex-direction: column;
        }
        .tactic-list-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .tactic-list-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .tactic-list-content {
            flex: 1;
            min-width: 0;
        }
        .tactic-list-content .item-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-tertiary);
            margin-bottom: 8px;
            flex-wrap: wrap;
        }
        .tactic-list-content .item-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .tactic-list-content .item-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .item-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            flex-wrap: wrap;
        }
        .item-footer .tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        /* Sidebar */
        .sidebar-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            margin-bottom: 20px;
        }
        .sidebar-card-header {
            padding: 16px 20px;
            background: var(--bg-light);
            border-bottom: 1px solid var(--border);
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card-body {
            padding: 16px 20px;
        }
        .hot-rank-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .hot-rank-item:last-child {
            border-bottom: none;
        }
        .hot-rank-item:hover {
            padding-left: 6px;
        }
        .rank-num {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--bg-light);
            color: var(--primary);
            font-weight: 700;
            font-size: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-family: var(--font-num);
        }
        .rank-num.top1 {
            background: var(--accent);
            color: #fff;
        }
        .rank-num.top2 {
            background: #E8883C;
            color: #fff;
        }
        .rank-num.top3 {
            background: var(--primary);
            color: #fff;
        }
        .hot-rank-info {
            flex: 1;
            min-width: 0;
        }
        .hot-rank-info .hot-title {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            line-height: 1.4;
        }
        .hot-rank-info .hot-value {
            font-size: 12px;
            color: var(--text-tertiary);
            font-family: var(--font-num);
        }

        /* Deep Content */
        .deep-content-section {
            padding: 40px 0 56px;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .deep-article {
            max-width: 800px;
            margin: 0 auto;
        }
        .deep-article h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin: 28px 0 12px;
            line-height: 1.4;
        }
        .deep-article h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin: 20px 0 10px;
        }
        .deep-article p {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .deep-article img {
            border-radius: var(--radius-card);
            margin: 20px 0;
            box-shadow: var(--shadow-card);
            width: 100%;
        }
        .deep-article blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light);
            padding: 16px 20px;
            border-radius: 0 8px 8px 0;
            margin: 20px 0;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* Data Strip */
        .data-strip-section {
            padding: 40px 0;
            background: var(--bg-light);
        }
        .data-strip-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .data-strip-item {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 20px;
            text-align: center;
            border-left: 3px solid var(--primary);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .data-strip-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .data-strip-item .data-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-num);
            margin-bottom: 6px;
        }
        .data-strip-item .data-label {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Process Section */
        .process-section {
            padding: 56px 0;
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: process-step;
        }
        .process-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            padding: 24px 20px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            position: relative;
        }
        .process-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .process-card .step-num {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 12px;
            font-family: var(--font-num);
        }
        .process-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .process-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* FAQ */
        .faq-section {
            padding: 56px 0;
            background: var(--bg-light);
        }
        .accordion {
            background: transparent;
        }
        .accordion-item {
            background: #fff;
            border-radius: 8px;
            margin-bottom: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .accordion-item:hover {
            border-color: var(--primary);
        }
        .accordion-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            padding: 16px 20px;
            background: #fff;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .accordion-title:hover {
            color: var(--primary);
        }
        .accordion-title::after {
            content: "\f107";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--text-tertiary);
            transition: var(--transition);
        }
        .is-active .accordion-title::after {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .accordion-content {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 14px;
            display: none;
        }
        .is-active .accordion-content {
            display: block;
        }

        /* CTA Section */
        .cta-section {
            padding: 56px 0 72px;
        }
        .cta-box {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 32px;
        }
        .cta-left h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .cta-left p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
            display: block;
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 10px 14px;
            border-radius: 6px;
            border: 1px solid var(--border);
            font-size: 14px;
            font-family: var(--font-cn);
            color: var(--text-main);
            background: #fff;
            transition: var(--transition);
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(27, 61, 92, 0.08);
            outline: none;
        }
        .cta-right {
            padding-left: 20px;
        }
        .cta-right h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .contact-info-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .contact-info-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .contact-info-list i {
            color: var(--accent);
            margin-top: 4px;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: #B8C7D5;
            padding: 48px 0 24px;
            font-size: 13px;
            line-height: 1.6;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 3fr 2fr 2fr 3fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .brand-logo {
            width: 38px;
            height: 38px;
            border-radius: 8px;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            margin-bottom: 10px;
        }
        .footer-brand h4 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin: 6px 0 6px;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.7;
            color: #B8C7D5;
        }
        .footer-col h4,
        .footer-subscribe h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul a {
            color: #B8C7D5;
            font-size: 13px;
        }
        .footer-col ul a:hover {
            color: var(--accent);
        }
        .footer-subscribe p {
            font-size: 13px;
            color: #B8C7D5;
            margin-bottom: 12px;
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 160px;
            padding: 10px 14px;
            border-radius: 6px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 13px;
            font-family: var(--font-cn);
        }
        .subscribe-form input::placeholder {
            color: #8A98A5;
        }
        .subscribe-form input:focus {
            border-color: var(--accent);
            outline: none;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
        }
        .footer-bottom .footer-links {
            margin-bottom: 10px;
            font-size: 13px;
        }
        .footer-bottom .footer-links a {
            color: #B8C7D5;
            margin: 0 4px;
        }
        .footer-bottom .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom p {
            margin: 4px 0;
            font-size: 12px;
            color: #8A98A5;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .data-strip-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            .page-banner h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .section-pad {
                padding: 48px 0;
            }
            .tactic-list-item {
                flex-direction: column;
            }
            .tactic-list-img {
                aspect-ratio: 16/9;
            }
            .cta-right {
                padding-left: 0;
                margin-top: 24px;
            }
            .cta-box {
                padding: 20px;
            }
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
            .brand-name {
                font-size: 17px;
            }
            .brand-tools .today-date {
                display: none;
            }
            .nav-icon-item {
                padding: 6px 10px;
                font-size: 11px;
            }
            .nav-icon-item i {
                font-size: 17px;
            }
            .page-banner {
                padding: 28px 0 32px;
            }
            .page-banner h1 {
                font-size: 24px;
            }
            .data-strip-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .filter-btn {
                padding: 6px 14px;
                font-size: 12px;
            }
            .section-title {
                font-size: 22px;
            }
            .deep-article h2 {
                font-size: 20px;
            }
            .hot-rank-item:hover {
                padding-left: 0;
            }
        }

/* roulang page: category7 */
:root {
            --primary: #1B3D5C;
            --primary-dark: #142E45;
            --accent: #2EA87C;
            --accent-light: #E8F5F0;
            --bg-light: #EDF2F7;
            --bg-page: #F7FAFC;
            --text-main: #1A2733;
            --text-secondary: #52616F;
            --text-tertiary: #8A98A5;
            --border: #E2E9F0;
            --shadow-card: 0 4px 16px rgba(27, 61, 92, 0.06);
            --shadow-hover: 0 8px 28px rgba(27, 61, 92, 0.12);
            --radius-card: 10px;
            --radius-btn: 6px;
            --radius-tag: 4px;
            --font-cn: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: Inter, "SF Pro Display", "PingFang SC", sans-serif;
            --transition: all 0.25s ease;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-cn);
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-main);
            background: var(--bg-page);
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
            text-decoration: none;
        }
        a:focus,
        button:focus,
        input:focus,
        select:focus,
        textarea:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (min-width: 1440px) {
            .container {
                max-width: 1400px;
            }
        }

        .section-pad {
            padding: 80px 0;
        }
        @media (max-width: 640px) {
            .section-pad {
                padding: 48px 16px;
            }
            .container {
                padding: 0 16px;
            }
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-sub {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 40px;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
            .section-sub {
                font-size: 14px;
                margin-bottom: 28px;
            }
        }

        .tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-tag);
            background: var(--accent-light);
            color: var(--accent);
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .tag.primary-tag {
            background: var(--bg-light);
            color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            font-family: var(--font-cn);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.5;
            text-align: center;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-card);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: #fff;
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }
        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }
        .btn-link {
            background: none;
            border: none;
            color: var(--primary);
            padding: 0;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-link:hover {
            color: var(--accent);
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(27, 61, 92, 0.04);
        }
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            gap: 16px;
        }
        .brand-logo {
            width: 42px;
            height: 42px;
            border-radius: 8px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-search {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-light);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 6px 12px;
            font-size: 13px;
            color: var(--text-tertiary);
            cursor: pointer;
            transition: var(--transition);
        }
        .header-search:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .header-search i {
            font-size: 14px;
        }
        @media (max-width: 640px) {
            .header-search span {
                display: none;
            }
            .header-search {
                padding: 6px 10px;
            }
            .brand-name {
                font-size: 16px;
            }
            .brand-logo {
                width: 34px;
                height: 34px;
                font-size: 16px;
                border-radius: 6px;
            }
            .brand-row {
                padding: 8px 0;
            }
        }

        .nav-icon-grid {
            display: flex;
            align-items: center;
            gap: 8px;
            overflow-x: auto;
            padding: 8px 0 12px;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--border) transparent;
        }
        .nav-icon-grid::-webkit-scrollbar {
            height: 4px;
        }
        .nav-icon-grid::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        .nav-icon-item {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .nav-icon-item i {
            font-size: 16px;
            color: var(--text-tertiary);
            transition: var(--transition);
        }
        .nav-icon-item:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .nav-icon-item:hover i {
            color: var(--accent);
        }
        .nav-icon-item.active {
            background: var(--primary);
            color: #fff;
        }
        .nav-icon-item.active i {
            color: #fff;
        }
        .nav-icon-item:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            padding: 16px 0 8px;
            font-size: 13px;
            color: var(--text-tertiary);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: var(--text-tertiary);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Category Hero */
        .cat-hero {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 36px;
            align-items: center;
            margin-bottom: 48px;
        }
        .cat-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cat-hero .cat-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 20px;
        }
        .cat-hero .cat-img-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .cat-hero .cat-img-wrap img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            transition: transform 0.3s ease;
        }
        .cat-hero .cat-img-wrap:hover img {
            transform: scale(1.03);
        }
        @media (max-width: 768px) {
            .cat-hero {
                grid-template-columns: 1fr;
                padding: 28px 20px;
                gap: 24px;
            }
            .cat-hero h1 {
                font-size: 26px;
            }
            .cat-hero .cat-img-wrap img {
                height: 200px;
            }
        }

        /* Ranking Featured Cards - unique layout */
        .ranking-feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-bottom: 48px;
        }
        .ranking-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            position: relative;
            transition: var(--transition);
            overflow: hidden;
        }
        .ranking-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            opacity: 0;
            transition: var(--transition);
        }
        .ranking-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .ranking-card:hover::before {
            opacity: 1;
        }
        .rank-number {
            font-family: var(--font-num);
            font-size: 56px;
            font-weight: 700;
            color: rgba(27, 61, 92, 0.08);
            line-height: 1;
            position: absolute;
            top: 20px;
            right: 24px;
            pointer-events: none;
        }
        .rank-card-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--accent-light);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }
        .rank-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .rank-card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
        }
        .rank-score-bar {
            background: var(--bg-light);
            border-radius: 100px;
            height: 6px;
            overflow: hidden;
            margin-bottom: 8px;
        }
        .rank-score-fill {
            height: 100%;
            border-radius: 100px;
            background: var(--primary);
            transition: width 0.6s ease;
        }
        .rank-score-label {
            font-size: 12px;
            color: var(--text-tertiary);
            display: flex;
            justify-content: space-between;
            font-family: var(--font-num);
        }
        .rank-score-label span:last-child {
            color: var(--primary);
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .ranking-feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .rank-number {
                font-size: 40px;
                top: 16px;
                right: 18px;
            }
            .ranking-card {
                padding: 22px 18px;
            }
        }

        /* Content prose */
        .prose-section {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            box-shadow: var(--shadow-card);
            margin-bottom: 48px;
        }
        .prose-section h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 18px;
            line-height: 1.4;
        }
        .prose-section h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-top: 28px;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .prose-section h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-top: 20px;
            margin-bottom: 8px;
        }
        .prose-section p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .prose-section .prose-img {
            border-radius: var(--radius-card);
            overflow: hidden;
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }
        .prose-section .prose-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
            max-height: 420px;
        }
        @media (max-width: 640px) {
            .prose-section {
                padding: 24px 16px;
            }
            .prose-section h2 {
                font-size: 20px;
            }
        }

        /* Metric Strip */
        .metric-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-bottom: 48px;
        }
        .metric-block {
            background: #fff;
            border: 1px solid var(--border);
            border-left: 3px solid var(--primary);
            border-radius: 8px;
            padding: 20px 18px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .metric-block:hover {
            box-shadow: var(--shadow-hover);
            border-left-color: var(--accent);
        }
        .metric-value {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .metric-value .accent {
            color: var(--accent);
        }
        .metric-label {
            font-size: 13px;
            color: var(--text-tertiary);
            line-height: 1.5;
        }
        @media (max-width: 768px) {
            .metric-strip {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            .metric-strip {
                grid-template-columns: 1fr;
            }
        }

        /* Ranking methodology list */
        .method-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 48px;
        }
        .method-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 20px 22px;
            display: flex;
            gap: 14px;
            align-items: flex-start;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .method-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }
        .method-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--bg-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            flex-shrink: 0;
        }
        .method-content h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .method-content p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        @media (max-width: 768px) {
            .method-list {
                grid-template-columns: 1fr;
            }
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-light);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            margin-bottom: 48px;
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .accordion {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 8px;
            margin-bottom: 10px;
            overflow: hidden;
            transition: var(--transition);
        }
        .accordion:hover {
            border-color: var(--primary);
        }
        .accordion-title {
            background: #fff;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-cn);
            transition: var(--transition);
        }
        .accordion-title i {
            color: var(--text-tertiary);
            transition: transform 0.25s ease;
            flex-shrink: 0;
        }
        .accordion-title[aria-expanded="true"] {
            color: var(--primary);
        }
        .accordion-title[aria-expanded="true"] i {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .accordion-title:focus {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .accordion-content {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .accordion-content.is-active {
            display: block;
        }
        @media (max-width: 640px) {
            .faq-section {
                padding: 28px 16px;
            }
            .accordion-title {
                padding: 14px 16px;
                font-size: 14px;
            }
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #fff 0%, #f0f5f9 100%);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            box-shadow: var(--shadow-card);
        }
        .cta-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 36px;
            align-items: start;
        }
        .cta-form .form-group {
            margin-bottom: 16px;
        }
        .cta-form label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .cta-form input,
        .cta-form textarea,
        .cta-form select {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: 6px;
            font-size: 14px;
            font-family: var(--font-cn);
            color: var(--text-main);
            background: #fff;
            transition: var(--transition);
        }
        .cta-form input:focus,
        .cta-form textarea:focus,
        .cta-form select:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 2px rgba(27, 61, 92, 0.12);
        }
        .cta-form textarea {
            resize: vertical;
            min-height: 100px;
        }
        .cta-info {
            background: #fff;
            border-radius: 8px;
            padding: 24px;
            border: 1px solid var(--border);
        }
        .cta-info h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .cta-info-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 10px;
        }
        .cta-info-item i {
            width: 20px;
            color: var(--accent);
            text-align: center;
        }
        @media (max-width: 768px) {
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-section {
                padding: 28px 18px;
            }
        }

        /* Footer */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
            margin-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        .footer-brand p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-top: 8px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-subscribe h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .footer-subscribe p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .subscribe-form {
            display: flex;
            gap: 8px;
        }
        .subscribe-form input {
            flex: 1;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: 6px;
            font-size: 13px;
            font-family: var(--font-cn);
        }
        .subscribe-form input:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 2px rgba(27, 61, 92, 0.12);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            text-align: center;
        }
        .footer-links {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-bottom: 10px;
            font-size: 13px;
        }
        .footer-links a {
            color: var(--text-tertiary);
            font-size: 13px;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-links span {
            color: var(--text-tertiary);
        }
        .footer-bottom p {
            font-size: 12px;
            color: var(--text-tertiary);
            margin-bottom: 4px;
            line-height: 1.5;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer {
                padding: 32px 16px 20px;
            }
            .subscribe-form {
                flex-direction: column;
            }
        }

        /* Utility */
        .text-center {
            text-align: center;
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-16 {
            gap: 16px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }