/* roulang page: index */
:root {
            --primary: #1e3a5f;
            --primary-light: #2d5a87;
            --primary-dark: #132a45;
            --accent: #f97316;
            --accent-light: #fdba74;
            --accent-dark: #c2570c;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-body: #f8fafc;
            --border-color: #e2e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(30, 58, 95, 0.06);
            --shadow-md: 0 6px 24px rgba(30, 58, 95, 0.08);
            --shadow-lg: 0 16px 40px rgba(30, 58, 95, 0.14);
            --transition-base: all .3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

        button,
        input {
            font: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

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

        .site-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

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

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(30, 58, 95, 0.25);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--primary);
            white-space: nowrap;
        }

        .brand-text span {
            color: var(--accent);
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }

        .main-nav .nav-link {
            display: inline-block;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            border-radius: 999px;
            transition: var(--transition-base);
            position: relative;
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.06);
        }

        .main-nav .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(30, 58, 95, 0.2);
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            background: rgba(30, 58, 95, 0.06);
            transition: var(--transition-base);
        }

        .menu-toggle:hover {
            background: rgba(30, 58, 95, 0.1);
        }

        .hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(10, 25, 47, 0.85) 0%, rgba(10, 25, 47, 0.7) 50%, rgba(10, 25, 47, 0.35) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 24px;
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(249, 115, 22, 0.2);
            border: 1px solid rgba(249, 115, 22, 0.4);
            color: var(--accent-light);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .hero h1 {
            font-size: 2.75rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: 1px;
            margin-bottom: 18px;
        }

        .hero h1 span {
            color: var(--accent-light);
        }

        .hero-desc {
            font-size: 1.125rem;
            color: rgba(255, 255, 255, 0.9);
            max-width: 620px;
            margin-bottom: 36px;
            line-height: 1.75;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 30px;
            border-radius: 12px;
            transition: var(--transition-base);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(249, 115, 22, 0.4);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.1);
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            padding: 13px 28px;
            border-radius: 12px;
            transition: var(--transition-base);
            backdrop-filter: blur(4px);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .stats-bar {
            position: relative;
            z-index: 3;
            background: var(--primary);
            border-radius: 20px;
            margin: -48px auto 0;
            max-width: 1080px;
            box-shadow: 0 20px 50px rgba(19, 42, 69, 0.3);
            padding: 36px 40px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 10px;
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .stat-num i {
            color: var(--accent-light);
            font-size: 1.4rem;
            margin-right: 4px;
        }

        .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 6px;
            letter-spacing: 0.5px;
        }

        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(249, 115, 22, 0.1);
            padding: 6px 18px;
            border-radius: 999px;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .section-header h2 {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.7;
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .about-image {
            position: relative;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .about-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .about-image:hover img {
            transform: scale(1.03);
        }

        .about-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(19, 42, 69, 0.2), transparent);
        }

        .about-content h2 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 18px;
            line-height: 1.4;
        }

        .about-content p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .about-feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .about-feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-main);
        }

        .about-feature-list li i {
            color: var(--accent);
            margin-top: 4px;
            font-size: 16px;
        }

        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .category-card-cover {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .category-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .category-card:hover .category-card-cover img {
            transform: scale(1.05);
        }

        .category-card-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(19, 42, 69, 0.3), transparent);
        }

        .category-card-body {
            padding: 28px 28px 30px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .category-card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .category-card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex-grow: 1;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 20px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
        }

        .category-link i {
            transition: transform .3s ease;
        }

        .category-link:hover i {
            transform: translateX(4px);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--accent);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }

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

        .news-card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 14px;
        }

        .news-category {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(249, 115, 22, 0.1);
            padding: 4px 14px;
            border-radius: 999px;
        }

        .news-time {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .news-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card h3 a {
            color: inherit;
        }

        .news-card h3 a:hover {
            color: var(--accent);
        }

        .news-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .news-link {
            margin-top: auto;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-link i {
            transition: transform .3s ease;
        }

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

        .news-link:hover i {
            transform: translateX(4px);
        }

        .empty-tip {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 15px;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-base);
            text-align: center;
            border: 1px solid rgba(226, 232, 240, 0.6);
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
            background: rgba(30, 58, 95, 0.08);
            color: var(--primary);
        }

        .feature-card:nth-child(1) .feature-icon {
            background: rgba(249, 115, 22, 0.1);
            color: var(--accent);
        }

        .feature-card:nth-child(2) .feature-icon {
            background: rgba(45, 90, 135, 0.1);
            color: var(--primary-light);
        }

        .feature-card:nth-child(3) .feature-icon {
            background: rgba(16, 185, 129, 0.1);
            color: #10b981;
        }

        .feature-card:nth-child(4) .feature-icon {
            background: rgba(139, 92, 246, 0.1);
            color: #8b5cf6;
        }

        .feature-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .steps-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
        }

        .steps-section .section-tag {
            color: var(--accent-light);
            background: rgba(249, 115, 22, 0.15);
        }

        .steps-section .section-header h2 {
            color: #fff;
        }

        .steps-section .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }

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

        .step-item {
            text-align: center;
            position: relative;
            padding: 30px 16px;
        }

        .step-num {
            width: 56px;
            height: 56px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: rgba(249, 115, 22, 0.2);
            border: 2px solid var(--accent);
            color: var(--accent-light);
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .step-item h3 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-item p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
            line-height: 1.6;
        }

        .step-item:not(:last-child)::after {
            content: '\f054';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            top: 42px;
            right: -20px;
            color: rgba(255, 255, 255, 0.3);
            font-size: 14px;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid rgba(226, 232, 240, 0.6);
            transition: var(--transition-base);
        }

        .faq-item.active {
            box-shadow: var(--shadow-md);
            border-color: rgba(249, 115, 22, 0.3);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            transition: var(--transition-base);
        }

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

        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform .3s ease;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 22px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .cta-section {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 90px 0;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(19, 42, 69, 0.9), rgba(30, 58, 95, 0.85));
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            margin-bottom: 30px;
            line-height: 1.7;
        }

        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 3fr 2fr 2fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 22px;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-links ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-item:not(:last-child)::after {
                display: none;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: #fff;
                padding: 16px 24px 24px;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
                transform: translateY(-120%);
                transition: transform .35s ease;
                border-radius: 0 0 20px 20px;
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .main-nav ul {
                flex-direction: column;
                gap: 4px;
                align-items: stretch;
            }
            .main-nav .nav-link {
                display: block;
                padding: 12px 18px;
                border-radius: 12px;
                font-size: 15px;
            }
            .menu-toggle {
                display: inline-flex;
            }
            .header-inner {
                height: 68px;
            }
            .hero {
                min-height: 460px;
            }
            .hero-content {
                padding: 60px 24px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .stats-bar {
                margin-top: -30px;
                padding: 24px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .section {
                padding: 64px 0;
            }
            .about-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .about-image img {
                height: 260px;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .brand-text {
                font-size: 17px;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .feature-card {
                padding: 24px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .step-item {
                padding: 20px 10px;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #1d4ed8;
            --primary-dark: #1e3a8a;
            --primary-light: #3b82f6;
            --accent: #10b981;
            --accent-light: #34d399;
            --accent-dark: #059669;
            --dark: #0f172a;
            --dark-2: #1e293b;
            --bg: #f1f5f9;
            --bg-light: #ffffff;
            --text: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
        }
        img { max-width: 100%; display: block; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        button { border: none; background: none; cursor: pointer; font-family: inherit; }
        ul, ol { list-style: none; }
        input, textarea { font-family: inherit; }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow { max-width: 960px; }
        .section { padding: 80px 0; }
        .section-header { text-align: center; margin-bottom: 48px; }
        .section-title { font-size: 2rem; font-weight: 800; color: var(--text); line-height: 1.3; letter-spacing: -0.02em; }
        .section-title span { color: var(--primary); }
        .section-sub { margin-top: 12px; color: var(--text-muted); font-size: 1.0625rem; max-width: 640px; margin-left: auto; margin-right: auto; }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
            justify-content: center;
        }
        .btn i { font-size: 0.85rem; }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(29, 78, 216, 0.3); }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(29, 78, 216, 0.35); }
        .btn-outline { border-color: var(--primary); color: var(--primary); background: transparent; }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .btn-light { background: #fff; color: var(--primary-dark); }
        .btn-light:hover { background: var(--bg); transform: translateY(-2px); box-shadow: var(--shadow); }
        .btn:focus-visible { outline: 3px solid rgba(29, 78, 216, 0.4); outline-offset: 2px; }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(29, 78, 216, 0.08);
            color: var(--primary);
            border: 1px solid rgba(29, 78, 216, 0.15);
        }

        .tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: #f1f5f9;
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .tag:hover { background: rgba(29, 78, 216, 0.08); border-color: rgba(29, 78, 216, 0.2); color: var(--primary); }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 10px rgba(15, 23, 42, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(29, 78, 216, 0.3);
        }
        .brand-text {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
        }
        .brand-text span { color: var(--primary); }
        .main-nav ul { display: flex; align-items: center; gap: 6px; }
        .nav-link {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover { color: var(--primary); background: rgba(29, 78, 216, 0.06); }
        .nav-link.active { color: var(--primary); background: rgba(29, 78, 216, 0.1); font-weight: 600; }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--bg);
            color: var(--text);
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-toggle:hover { background: rgba(29, 78, 216, 0.08); color: var(--primary); }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 72px 0 64px;
            background-image: linear-gradient(135deg, rgba(2, 6, 23, 0.88) 0%, rgba(15, 23, 42, 0.78) 50%, rgba(29, 78, 216, 0.55) 100%),
                url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            color: #fff;
            overflow: hidden;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg), transparent);
        }
        .article-hero .container { position: relative; z-index: 2; }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }
        .breadcrumb a { color: rgba(255, 255, 255, 0.85); transition: var(--transition); }
        .breadcrumb a:hover { color: #fff; text-decoration: underline; }
        .breadcrumb i { font-size: 0.6rem; opacity: 0.6; }
        .breadcrumb span { color: var(--accent-light); font-weight: 500; }
        .hero-title {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 18px;
            max-width: 780px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.85);
        }
        .meta-item { display: inline-flex; align-items: center; gap: 6px; }
        .meta-item i { font-size: 0.8rem; opacity: 0.7; }
        .meta-badge {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 50px;
            background: rgba(16, 185, 129, 0.25);
            border: 1px solid rgba(16, 185, 129, 0.4);
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-light);
        }

        /* ===== Article Content ===== */
        .article-content-section {
            padding: 56px 0 72px;
            position: relative;
        }
        .article-card-wrapper {
            max-width: 920px;
            margin: -40px auto 0;
            position: relative;
            z-index: 3;
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            overflow: hidden;
        }
        .article-card-inner { padding: 48px 52px 40px; }

        .rich-content {
            font-size: 1.0625rem;
            line-height: 1.9;
            color: var(--text-body);
        }
        .rich-content h2, .rich-content h3, .rich-content h4 {
            color: var(--text);
            font-weight: 700;
            line-height: 1.4;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        .rich-content h2 { font-size: 1.55rem; padding-bottom: 0.6rem; border-bottom: 2px solid var(--border); }
        .rich-content h3 { font-size: 1.3rem; }
        .rich-content h4 { font-size: 1.1rem; }
        .rich-content p { margin-bottom: 1.25rem; }
        .rich-content ul, .rich-content ol { margin: 1rem 0 1.5rem; padding-left: 1.5rem; }
        .rich-content ul li { list-style: disc; margin-bottom: 0.5rem; }
        .rich-content ol li { list-style: decimal; margin-bottom: 0.5rem; }
        .rich-content img { border-radius: 12px; margin: 1.5rem 0; box-shadow: var(--shadow-sm); }
        .rich-content a { color: var(--primary); font-weight: 500; border-bottom: 1px solid rgba(29, 78, 216, 0.2); }
        .rich-content a:hover { border-bottom-color: var(--primary); }
        .rich-content blockquote {
            border-left: 4px solid var(--primary);
            background: #eff6ff;
            padding: 1.25rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin: 1.5rem 0;
            font-size: 1rem;
            color: var(--text-body);
        }
        .rich-content blockquote p { margin-bottom: 0; }
        .rich-content table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.95rem; }
        .rich-content table th { background: var(--primary); color: #fff; padding: 12px 16px; text-align: left; font-weight: 600; }
        .rich-content table td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
        .rich-content table tr:nth-child(even) { background: #f8fafc; }
        .rich-content code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 0.9rem;
            font-family: 'SFMono-Regular', Consolas, monospace;
            color: #be123c;
        }

        .not-found-box {
            text-align: center;
            padding: 60px 24px;
        }
        .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; }
        .not-found-box h2 { font-size: 1.8rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 24px; }

        .article-footer-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            margin-top: 32px;
            border-top: 1px solid var(--border);
        }
        .tag-list { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
        .tag-list .tag { font-size: 0.8rem; }
        .back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary);
            padding: 8px 18px;
            border-radius: 50px;
            background: rgba(29, 78, 216, 0.06);
            transition: var(--transition);
        }
        .back-home:hover { background: rgba(29, 78, 216, 0.14); transform: translateX(-2px); }

        /* ===== Related Section ===== */
        .related-section { padding: 72px 0 80px; background: var(--bg); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(29, 78, 216, 0.12); }
        .related-img { position: relative; overflow: hidden; height: 180px; }
        .related-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .related-card:hover .related-img img { transform: scale(1.06); }
        .related-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(2, 6, 23, 0.5), transparent 60%);
        }
        .related-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.95);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .related-body { padding: 20px 20px 24px; display: flex; flex-direction: column; flex: 1; }
        .related-body h3 { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 8px; line-height: 1.5; }
        .related-body p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.7; flex: 1; }
        .related-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            color: var(--primary);
            font-size: 0.875rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .related-link i { font-size: 0.75rem; transition: transform 0.3s ease; }
        .related-card:hover .related-link i { transform: translateX(4px); }
        .related-link:hover { color: var(--primary-dark); }

        /* ===== Key Info Section ===== */
        .info-section { padding: 72px 0; background: #fff; }
        .info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .info-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 32px 28px;
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .info-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); background: #fff; }
        .info-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(29, 78, 216, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin: 0 auto 16px;
            transition: var(--transition);
        }
        .info-card:hover .info-icon { background: var(--primary); color: #fff; }
        .info-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
        .info-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; }

        /* ===== FAQ Section ===== */
        .faq-section { padding: 72px 0 80px; background: var(--bg); }
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(29, 78, 216, 0.18); box-shadow: var(--shadow); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            background: transparent;
            text-align: left;
            width: 100%;
        }
        .faq-question i {
            font-size: 0.8rem;
            color: var(--primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.9375rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA Section ===== */
        .cta-section { padding: 0 0 80px; background: var(--bg); }
        .cta-inner {
            position: relative;
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            background-image: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #2563eb 100%);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: 0 20px 50px rgba(29, 78, 216, 0.25);
        }
        .cta-inner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }
        .cta-inner::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 30%;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
        }
        .cta-content { position: relative; z-index: 2; flex: 1; min-width: 260px; }
        .cta-content h2 { font-size: 1.8rem; font-weight: 800; color: #fff; margin-bottom: 10px; line-height: 1.3; }
        .cta-content p { color: rgba(255, 255, 255, 0.85); font-size: 1rem; max-width: 520px; }
        .cta-actions { position: relative; z-index: 2; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
        .cta-actions .btn-light { box-shadow: 0 8px 24px rgba(2, 6, 23, 0.15); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
            position: relative;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(to right, var(--primary), var(--accent), var(--primary));
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand p { font-size: 0.9rem; line-height: 1.8; opacity: 0.75; max-width: 320px; }
        .footer-links h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-links a:hover { color: var(--accent-light); padding-left: 4px; }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a { color: rgba(255, 255, 255, 0.6); transition: var(--transition); }
        .footer-bottom a:hover { color: var(--accent-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.1rem; }
            .section-title { font-size: 1.75rem; }
            .related-grid { gap: 18px; }
            .article-card-inner { padding: 40px 36px; }
            .cta-inner { padding: 48px 36px; }
        }
        @media (max-width: 768px) {
            .container { padding: 0 20px; }
            .section { padding: 56px 0; }
            .nav-toggle { display: flex; }
            .main-nav {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
                padding: 16px 20px;
            }
            .main-nav.open { display: block; }
            .main-nav ul { flex-direction: column; gap: 4px; align-items: stretch; }
            .nav-link { display: block; padding: 12px 16px; font-size: 1rem; border-radius: 12px; }
            .nav-link.active::after { display: none; }
            .article-hero { padding: 56px 0 48px; }
            .hero-title { font-size: 1.6rem; }
            .article-card-wrapper { margin-top: -24px; }
            .article-card-inner { padding: 28px 20px; }
            .related-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
            .info-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .cta-inner { padding: 40px 28px; flex-direction: column; text-align: center; }
            .cta-content p { margin: 0 auto; }
            .cta-actions { justify-content: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .header-inner { height: 64px; }
            .brand-text { font-size: 1.2rem; }
            .brand-icon { width: 36px; height: 36px; font-size: 1.1rem; }
            .section-title { font-size: 1.5rem; }
            .hero-title { font-size: 1.4rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
            .article-card-inner { padding: 24px 16px; }
            .rich-content { font-size: 1rem; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
            .breadcrumb { font-size: 0.8rem; }
            .cta-content h2 { font-size: 1.4rem; }
            .footer-bottom { justify-content: center; text-align: center; }
            .btn { padding: 10px 22px; font-size: 0.875rem; }
        }

/* roulang page: category1 */
:root {
            --brand: #0d2b45;
            --brand-light: #16406b;
            --brand-dark: #081e33;
            --brand-pale: #eef3f8;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --bg-soft: #f1f5f9;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow: 0 10px 30px rgba(13, 43, 69, 0.08);
            --shadow-lg: 0 20px 50px rgba(13, 43, 69, 0.14);
            --transition: all .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background: var(--bg-soft);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        body .container {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        .section {
            padding: 80px 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
        }

        /* ---------- header ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
        }

        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

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

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-light), var(--accent-dark));
            color: #fff;
            font-weight: 800;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--brand);
            letter-spacing: .5px;
        }

        .brand-text .brand-accent {
            color: var(--accent);
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }

        .main-nav .nav-link {
            display: block;
            padding: 10px 22px;
            border-radius: 100px;
            font-weight: 500;
            font-size: 15px;
            color: var(--text-main);
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .main-nav .nav-link:hover {
            background: var(--brand-pale);
            color: var(--brand);
            border-color: rgba(13, 43, 69, 0.08);
        }

        .main-nav .nav-link.active {
            background: var(--brand);
            color: #fff;
            box-shadow: 0 6px 18px rgba(13, 43, 69, 0.22);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 9px 10px;
            width: 42px;
            height: 42px;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        @media (max-width: 768px) {
            .site-header .header-inner {
                height: 64px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                padding: 16px 20px;
                display: none;
                border-radius: 0 0 16px 16px;
            }

            .main-nav.open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
            }

            .main-nav .nav-link {
                text-align: center;
                padding: 12px 16px;
                border-radius: 12px;
            }

            .main-nav .nav-link.active {
                background: var(--brand);
                color: #fff;
            }
        }

        /* ---------- hero ---------- */
        .hero {
            position: relative;
            background:
                linear-gradient(120deg, rgba(8, 30, 51, 0.94) 0%, rgba(13, 43, 69, 0.86) 48%, rgba(22, 64, 107, 0.72) 100%),
                url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            color: #fff;
            padding: 110px 0 100px;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            right: -120px;
            top: -120px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.25) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 100px;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--accent-light);
            margin-bottom: 24px;
            letter-spacing: .5px;
        }

        .hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 18px;
        }

        .hero h1 .highlight {
            color: var(--accent-light);
            position: relative;
        }

        .hero-desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin-bottom: 32px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            transition: var(--transition);
            border: 2px solid transparent;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.32);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(245, 158, 11, 0.4);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.55);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .hero-card {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 20px;
            padding: 24px;
            backdrop-filter: blur(8px);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
        }

        .hero-card img {
            border-radius: 14px;
            width: 100%;
            height: 180px;
            object-fit: cover;
            margin-bottom: 16px;
        }

        .hero-card .card-tag {
            display: inline-block;
            background: rgba(245, 158, 11, 0.18);
            color: var(--accent-light);
            padding: 5px 14px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .hero-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .hero-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 16px;
        }

        .hero-card .card-link {
            color: var(--accent-light);
            font-size: 14px;
            font-weight: 600;
        }

        .hero-card .card-link i {
            margin-left: 4px;
            transition: transform .2s;
        }

        .hero-card .card-link:hover i {
            transform: translateX(4px);
        }

        @media (max-width: 992px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero h1 {
                font-size: 36px;
            }
        }

        @media (max-width: 520px) {
            .hero {
                padding: 64px 0 60px;
            }

            .hero h1 {
                font-size: 30px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .btn {
                justify-content: center;
            }
        }

        /* ---------- section header ---------- */
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 50px;
        }

        .section-header .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-dark);
            font-weight: 600;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }

        .section-header .section-label::before,
        .section-header .section-label::after {
            content: '';
            width: 28px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--brand);
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
        }

        @media (max-width: 520px) {
            .section-header h2 {
                font-size: 26px;
            }
        }

        /* ---------- intro ---------- */
        .intro-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 36px 30px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            height: 100%;
        }

        .intro-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .intro-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            background: var(--brand-pale);
            color: var(--brand);
            margin-bottom: 18px;
        }

        .intro-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--brand);
            margin-bottom: 10px;
        }

        .intro-card p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
        }

        /* ---------- topic cards ---------- */
        .topic-section {
            background: #fff;
        }

        .topic-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .topic-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .topic-card .cover {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .topic-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .topic-card:hover .cover img {
            transform: scale(1.05);
        }

        .topic-card .cover .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(13, 43, 69, 0.88);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 100px;
            backdrop-filter: blur(4px);
        }

        .topic-card .card-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .topic-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--brand);
            margin-bottom: 8px;
        }

        .topic-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }

        .topic-card .btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand);
            transition: var(--transition);
        }

        .topic-card .btn-sm i {
            transition: transform .2s;
        }

        .topic-card .btn-sm:hover {
            color: var(--accent-dark);
        }

        .topic-card .btn-sm:hover i {
            transform: translateX(4px);
        }

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

        .news-layout {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 40px;
        }

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

        .news-item {
            display: flex;
            gap: 20px;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 20px 24px;
            transition: var(--transition);
            align-items: flex-start;
        }

        .news-item:hover {
            box-shadow: var(--shadow);
            transform: translateX(4px);
            border-color: rgba(245, 158, 11, 0.4);
        }

        .news-date {
            flex-shrink: 0;
            text-align: center;
            background: var(--brand-pale);
            border-radius: 12px;
            padding: 10px 14px;
            min-width: 62px;
        }

        .news-date .day {
            font-size: 24px;
            font-weight: 800;
            color: var(--brand);
            line-height: 1.2;
        }

        .news-date .month {
            font-size: 13px;
            color: var(--text-muted);
        }

        .news-content {
            flex: 1;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 6px;
            flex-wrap: wrap;
        }

        .news-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 100px;
        }

        .news-category {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .news-content h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
            line-height: 1.5;
            transition: color .2s;
        }

        .news-content h3 a:hover {
            color: var(--accent-dark);
        }

        .news-content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 10px;
        }

        .news-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .news-more i {
            transition: transform .2s;
        }

        .news-more:hover i {
            transform: translateX(4px);
        }

        /* sidebar */
        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 26px;
            box-shadow: var(--shadow);
        }

        .sidebar-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--brand);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--brand-pale);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h4 i {
            color: var(--accent);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-cloud .tag {
            display: inline-block;
            background: var(--bg-soft);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 6px 15px;
            font-size: 13px;
            color: var(--text-main);
            transition: var(--transition);
        }

        .tag-cloud .tag:hover {
            background: var(--brand);
            color: #fff;
            border-color: var(--brand);
        }

        .sidebar-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-list li a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            transition: color .2s;
            font-size: 14px;
            color: var(--text-main);
            line-height: 1.5;
        }

        .sidebar-list li a i {
            color: var(--accent);
            margin-top: 4px;
            font-size: 12px;
        }

        .sidebar-list li a:hover {
            color: var(--accent-dark);
        }

        @media (max-width: 992px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            .news-item {
                flex-direction: column;
                gap: 12px;
            }

            .news-date {
                display: flex;
                align-items: baseline;
                gap: 6px;
                padding: 8px 14px;
            }
        }

        /* ---------- stats ---------- */
        .stats-section {
            position: relative;
            background:
                linear-gradient(135deg, rgba(8, 30, 51, 0.92) 0%, rgba(13, 43, 69, 0.88) 100%),
                url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            padding: 80px 0;
            color: #fff;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }

        .stat-item {
            padding: 20px 10px;
        }

        .stat-item .num {
            font-size: 44px;
            font-weight: 800;
            color: var(--accent-light);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-item .label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.78);
            letter-spacing: .5px;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stat-item .num {
                font-size: 34px;
            }
        }

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

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            counter-reset: step;
        }

        .process-item {
            position: relative;
            background: var(--bg-soft);
            border-radius: var(--radius);
            padding: 32px 26px;
            text-align: center;
            transition: var(--transition);
            border: 1px solid transparent;
        }

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

        .process-step {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--brand);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 8px 20px rgba(13, 43, 69, 0.25);
        }

        .process-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--brand);
            margin-bottom: 8px;
        }

        .process-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        @media (max-width: 992px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

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

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(13, 43, 69, 0.2);
            box-shadow: var(--shadow);
        }

        .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-main);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-q .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--brand-pale);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--brand);
            transition: var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: #fff;
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-a-inner {
            padding: 0 24px 22px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.85;
            border-top: 1px dashed var(--border);
            padding-top: 14px;
            margin-top: 0;
        }

        /* ---------- CTA ---------- */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            left: -80px;
            bottom: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.12);
        }

        .cta-card {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-card h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .cta-card p {
            font-size: 16px;
            opacity: .9;
            margin-bottom: 28px;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-white {
            background: #fff;
            color: var(--accent-dark);
            border-color: #fff;
        }

        .btn-white:hover {
            background: var(--brand);
            color: #fff;
            border-color: var(--brand);
            transform: translateY(-2px);
        }

        .btn-line {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }

        .btn-line:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: #fff;
            transform: translateY(-2px);
        }

        @media (max-width: 520px) {
            .cta-card h2 {
                font-size: 25px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
        }

        /* ---------- footer ---------- */
        .site-footer {
            background: var(--brand-dark);
            color: rgba(255, 255, 255, 0.75);
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 50px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 6px;
            max-width: 400px;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-links h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .footer-links ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: var(--transition);
        }

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

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
        }

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

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ---------- scroll top ---------- */
        .scroll-top {
            position: fixed;
            right: 22px;
            bottom: 22px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--brand);
            color: #fff;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            box-shadow: var(--shadow-lg);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }

        .scroll-top.show {
            opacity: 1;
            visibility: visible;
        }

        .scroll-top:hover {
            background: var(--accent);
            transform: translateY(-4px);
        }

/* roulang page: category2 */
:root {
            --primary: #1e3a8a;
            --primary-dark: #172e66;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #f8fafc;
            --bg-soft: #eef2f7;
            --dark-bg: #0f172a;
            --text: #1e293b;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, .06);
            --shadow: 0 8px 30px rgba(0, 0, 0, .08);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, .12);
            --transition: all .3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, .7);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(15, 23, 42, .06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 16px;
        }

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

        .brand-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 12px;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(30, 58, 138, .3);
        }

        .brand-text {
            font-size: 21px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: .5px;
        }

        .brand-text span {
            color: var(--accent);
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav .nav-link {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }

        .main-nav .nav-link:hover {
            background: rgba(30, 58, 138, .06);
            color: var(--primary);
        }

        .main-nav .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(30, 58, 138, .25);
        }

        .main-nav .nav-link.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            cursor: pointer;
            background: rgba(30, 58, 138, .08);
            transition: var(--transition);
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Hero ===== */
        .hero-category {
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            padding: 120px 0 100px;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, .78), rgba(30, 58, 138, .62));
        }

        .hero-category .container {
            position: relative;
            z-index: 2;
        }

        .hero-content {
            max-width: 720px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            background: rgba(251, 191, 36, .15);
            border: 1px solid rgba(251, 191, 36, .4);
            color: #fbbf24;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }

        .hero-category h1 {
            font-size: 52px;
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .hero-category h1 span {
            color: var(--accent-light);
        }

        .hero-category .hero-desc {
            font-size: 18px;
            color: rgba(255, 255, 255, .85);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 620px;
        }

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

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 999px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--accent);
            color: #0f172a;
            box-shadow: 0 6px 20px rgba(245, 158, 11, .35);
        }

        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(245, 158, 11, .45);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .6);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline-dark {
            background: transparent;
            color: var(--primary);
            border-color: rgba(30, 58, 138, .3);
        }

        .btn-outline-dark:hover {
            background: rgba(30, 58, 138, .06);
            border-color: var(--primary);
        }

        .btn-dark {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(30, 58, 138, .3);
        }

        .btn-dark:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(30, 58, 138, .4);
        }

        /* ===== Section 通用 ===== */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: var(--bg-soft);
        }

        .section-white {
            background: #fff;
        }

        .section-head {
            max-width: 680px;
            margin-bottom: 50px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-kicker {
            display: inline-block;
            padding: 5px 14px;
            background: rgba(30, 58, 138, .08);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
            margin-bottom: 14px;
            letter-spacing: .5px;
        }

        .section-head h2 span {
            color: var(--primary);
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== 标签云 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .tag-item i {
            color: var(--primary);
        }

        .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(30, 58, 138, .03);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(30, 58, 138, .15);
        }

        .card-img {
            position: relative;
            height: 210px;
            overflow: hidden;
        }

        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .card-item:hover .card-img img {
            transform: scale(1.06);
        }

        .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, .25), transparent 60%);
        }

        .card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            padding: 5px 14px;
            background: rgba(255, 255, 255, .9);
            backdrop-filter: blur(6px);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(0, 0, 0, .12);
        }

        .card-body {
            padding: 26px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.35;
        }

        .card-body h3 a:hover {
            color: var(--primary);
        }

        .card-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 18px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 44px;
        }

        .stat-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 30px 24px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

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

        .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }

        .stat-number i {
            font-size: 28px;
            color: var(--accent);
            margin-right: 4px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-weak);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ===== 表格 ===== */
        .table-wrapper {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
        }

        .table-responsive {
            overflow-x: auto;
        }

        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 15px;
        }

        .data-table thead {
            background: var(--primary);
            color: #fff;
        }

        .data-table th {
            padding: 16px 20px;
            text-align: left;
            font-weight: 600;
            font-size: 14px;
            letter-spacing: .5px;
        }

        .data-table td {
            padding: 15px 20px;
            border-bottom: 1px solid var(--border);
            color: var(--text);
        }

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

        .data-table tbody tr:hover {
            background: rgba(30, 58, 138, .02);
        }

        .data-table .highlight {
            color: var(--primary);
            font-weight: 700;
        }

        /* ===== 图文混合区块 ===== */
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

        .knowledge-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .knowledge-img {
            height: 180px;
            overflow: hidden;
        }

        .knowledge-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .knowledge-body {
            padding: 26px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .knowledge-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .knowledge-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .knowledge-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .knowledge-link:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        /* ===== 时间线 ===== */
        .steps-wrapper {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            padding: 20px 0;
        }

        .steps-wrapper::before {
            content: '';
            position: absolute;
            left: 28px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary-light), var(--accent));
        }

        .step-item {
            position: relative;
            padding: 0 0 40px 80px;
        }

        .step-item:last-child {
            padding-bottom: 0;
        }

        .step-dot {
            position: absolute;
            left: 14px;
            top: 6px;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: #fff;
            border: 3px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 800;
            color: var(--primary);
            box-shadow: 0 0 0 4px rgba(30, 58, 138, .12);
            z-index: 2;
        }

        .step-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .step-card:hover {
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 16px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
        }

        .faq-item:hover {
            box-shadow: var(--shadow);
        }

        .faq-item summary {
            padding: 22px 28px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 14px;
            list-style: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::before {
            content: '\f059';
            font-family: 'Font Awesome 6 Free';
            font-weight: 400;
            color: var(--primary);
            font-size: 20px;
        }

        .faq-item[open] summary {
            border-bottom: 1px solid var(--border);
            background: rgba(30, 58, 138, .02);
        }

        .faq-item[open] summary::before {
            content: '\f059';
            color: var(--accent);
        }

        .faq-answer {
            padding: 20px 28px 24px;
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .section-cta {
            padding: 90px 0;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .section-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, .82), rgba(30, 58, 138, .7));
        }

        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .cta-content p {
            font-size: 17px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 30px;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, .8);
            padding: 70px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .65);
            max-width: 360px;
        }

        .footer-links h4 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-links h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 32px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .footer-links ul li {
            margin-bottom: 12px;
        }

        .footer-links ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, .65);
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .6);
        }

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

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            right: 30px;
            bottom: 30px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 6px 20px rgba(30, 58, 138, .35);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
        }

        .back-top.show {
            opacity: 1;
            visibility: visible;
        }

        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 26px rgba(30, 58, 138, .45);
        }

        /* ===== Focus 可访问性 ===== */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(245, 158, 11, .6);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 22px;
            }

            .knowledge-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 22px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .hero-category h1 {
                font-size: 44px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }

            .section-head h2 {
                font-size: 30px;
            }

            /* 移动端导航 */
            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 74px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                padding: 16px 24px 24px;
                box-shadow: 0 20px 40px rgba(15, 23, 42, .1);
                transform: translateY(-16px);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                border-radius: 0 0 20px 20px;
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }

            .main-nav .nav-link {
                display: block;
                padding: 12px 20px;
                border-radius: 12px;
                text-align: center;
                font-size: 16px;
            }

            .main-nav .nav-link.active {
                box-shadow: none;
            }

            .hero-category {
                padding: 90px 0 72px;
            }

            .hero-category h1 {
                font-size: 36px;
            }

            .hero-category .hero-desc {
                font-size: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .card-grid {
                grid-template-columns: 1fr;
            }

            .knowledge-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .stat-card {
                padding: 22px 16px;
            }

            .stat-number {
                font-size: 30px;
            }

            .hero-category h1 {
                font-size: 30px;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .btn {
                width: 100%;
            }

            .step-item {
                padding-left: 64px;
            }

            .steps-wrapper::before {
                left: 22px;
            }

            .step-dot {
                left: 10px;
                width: 26px;
                height: 26px;
                font-size: 11px;
            }

            .faq-item summary {
                font-size: 15px;
                padding: 18px 20px;
            }

            .faq-answer {
                padding: 16px 20px;
            }
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f766e;
            --primary-light: #14b8a6;
            --primary-dark: #115e59;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-body: #f7f9f8;
            --bg-section: #ffffff;
            --bg-dark: #0f2e2b;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-main: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 1px 4px rgba(0,0,0,0.04);
            --shadow-md: 0 6px 20px rgba(0,0,0,0.07);
            --shadow-lg: 0 16px 40px rgba(0,0,0,0.1);
            --transition: all .3s cubic-bezier(.4,0,.2,1);
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul, ol {
            list-style: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航 Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-main);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 20px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            font-weight: 700;
            box-shadow: 0 3px 10px rgba(15, 118, 110, 0.25);
        }
        .brand-text {
            font-size: 21px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.5px;
        }
        .brand-text span {
            color: var(--primary);
        }
        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
        }
        .nav-link {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            line-height: 1.5;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(15, 118, 110, 0.08);
        }
        .nav-link.active {
            color: #fff;
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 3px 12px rgba(15, 118, 110, 0.3);
        }
        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--border-main);
            background: #fff;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text-main);
            transition: var(--transition);
            margin-left: auto;
        }
        .menu-toggle:hover {
            background: #f0fdfa;
            border-color: var(--primary-light);
        }
        .menu-toggle i {
            pointer-events: none;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 86px 0 88px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 46, 43, 0.88) 0%, rgba(15, 118, 110, 0.72) 55%, rgba(20, 184, 166, 0.48) 100%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 18px;
        }
        .hero-breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }
        .hero-breadcrumb a:hover {
            color: var(--accent-light);
        }
        .hero-breadcrumb i {
            font-size: 12px;
            opacity: 0.6;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.16);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 5px 15px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 1px;
            margin-bottom: 18px;
            backdrop-filter: blur(6px);
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
        }
        .page-hero p {
            font-size: 17px;
            max-width: 620px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 30px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.5;
        }
        .btn-primary {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
            background: var(--accent-light);
            color: #1e293b;
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }

        /* ===== 通用 Section ===== */
        .section {
            padding: 72px 0;
        }
        .section.bg-white {
            background: #fff;
        }
        .section.bg-light {
            background: #f0f7f5;
        }
        .section-header {
            margin-bottom: 42px;
        }
        .section-header .section-subtitle {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--primary);
            background: rgba(15, 118, 110, 0.08);
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 10px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            color: var(--text-muted);
            max-width: 540px;
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== 简介数据 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
        }
        .intro-text h2 {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .intro-text h2 span {
            color: var(--primary);
        }
        .intro-text p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .intro-stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }
        .stat-card {
            background: #fff;
            border: 1px solid var(--border-main);
            border-radius: var(--radius-md);
            padding: 24px 18px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 118, 110, 0.3);
        }
        .stat-card .num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 4px;
        }
        .stat-card .label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== 内容卡片 ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .content-card {
            background: #fff;
            border: 1px solid var(--border-main);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 118, 110, 0.25);
        }
        .card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }
        .content-card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.08) 0%, rgba(0,0,0,0) 45%);
        }
        .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary-dark);
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(6px);
        }
        .card-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-body h3 {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-main);
            transition: var(--transition);
        }
        .content-card:hover .card-body h3 {
            color: var(--primary);
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 14px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid #f0f4f3;
            padding-top: 12px;
        }
        .card-meta a {
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
        }
        .card-meta a:hover {
            color: var(--primary-dark);
        }

        /* ===== 指南目录 ===== */
        .guide-layout {
            display: grid;
            grid-template-columns: 300px 1fr;
            gap: 32px;
            align-items: start;
        }
        .guide-sidebar {
            background: var(--bg-dark);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            color: #fff;
            position: sticky;
            top: 90px;
        }
        .guide-sidebar h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 18px;
            color: #fff;
        }
        .guide-sidebar ul li {
            margin-bottom: 4px;
        }
        .guide-sidebar ul li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 9px 14px;
            border-radius: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            transition: var(--transition);
        }
        .guide-sidebar ul li a:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            padding-left: 18px;
        }
        .guide-sidebar ul li a i {
            width: 18px;
            text-align: center;
            color: var(--accent-light);
            font-size: 13px;
        }
        .guide-content {
            background: #fff;
            border: 1px solid var(--border-main);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .guide-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
        }
        .guide-table th {
            background: #f0f7f5;
            color: var(--primary-dark);
            font-weight: 700;
            padding: 14px 18px;
            text-align: left;
            border-bottom: 2px solid #dce8e5;
        }
        .guide-table td {
            padding: 13px 18px;
            border-bottom: 1px solid #f1f5f4;
            color: var(--text-main);
        }
        .guide-table tr:last-child td {
            border-bottom: none;
        }
        .guide-table tr:hover td {
            background: #fafcfb;
        }
        .guide-table .status {
            display: inline-block;
            padding: 2px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
        }
        .status-ok {
            background: #d1fae5;
            color: #065f46;
        }
        .status-warn {
            background: #fef3c7;
            color: #92400e;
        }
        .status-info {
            background: #dbeafe;
            color: #1e40af;
        }

        /* ===== 标签云 ===== */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            border: 1px solid var(--border-main);
            background: #fff;
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }
        .tag-item i {
            font-size: 13px;
            color: var(--primary);
        }
        .tag-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(15, 118, 110, 0.25);
        }
        .tag-item:hover i {
            color: #fff;
        }

        /* ===== 内容列表 ===== */
        .article-list {
            max-width: 860px;
            margin: 0 auto;
            background: #fff;
            border: 1px solid var(--border-main);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }
        .article-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 20px 24px;
            border-bottom: 1px solid #f0f4f3;
            transition: var(--transition);
        }
        .article-item:last-child {
            border-bottom: none;
        }
        .article-item:hover {
            background: #f8fdfb;
        }
        .article-item .article-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(15, 118, 110, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 17px;
            flex-shrink: 0;
        }
        .article-item .article-info {
            flex: 1;
            min-width: 0;
        }
        .article-item .article-info h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: var(--transition);
        }
        .article-item:hover .article-info h3 {
            color: var(--primary);
        }
        .article-item .article-info p {
            font-size: 13px;
            color: var(--text-muted);
        }
        .article-item .article-date {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-main);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item.active {
            border-color: rgba(15, 118, 110, 0.3);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(15, 118, 110, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--primary);
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item.active .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }
        .faq-answer p {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-band {
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary-dark) 60%, var(--primary) 100%);
            border-radius: var(--radius-lg);
            padding: 52px 48px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .cta-band::before {
            content: "";
            position: absolute;
            top: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
        }
        .cta-band h2 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .cta-band p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 460px;
        }
        .cta-band .btn-primary {
            white-space: nowrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f2e2b;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 360px;
        }
        .footer-links h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-links ul li {
            margin-bottom: 9px;
        }
        .footer-links ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition);
        }
        .footer-links ul li a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 20px 0;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
            .header-inner {
                height: 60px;
            }
            .menu-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border-main);
                box-shadow: 0 8px 24px rgba(0,0,0,0.08);
                padding: 16px 20px;
                display: none;
                z-index: 99;
                max-height: calc(100vh - 60px);
                overflow-y: auto;
            }
            .main-nav.open {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 2px;
            }
            .nav-link {
                display: block;
                padding: 11px 16px;
                border-radius: 10px;
                width: 100%;
            }
            .nav-link.active {
                border-radius: 10px;
            }
            .page-hero {
                padding: 60px 0 64px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .section {
                padding: 52px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .guide-layout {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .guide-sidebar {
                position: static;
                top: auto;
            }
            .cta-band {
                flex-direction: column;
                padding: 36px 24px;
                text-align: center;
            }
            .cta-band p {
                max-width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero p {
                font-size: 14px;
            }
            .hero-actions .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .card-img {
                height: 180px;
            }
            .intro-stats {
                gap: 12px;
            }
            .stat-card .num {
                font-size: 28px;
            }
            .article-item {
                padding: 16px;
                gap: 12px;
            }
            .article-item .article-date {
                display: none;
            }
            .faq-question {
                padding: 16px;
                font-size: 15px;
            }
            .faq-answer p {
                padding: 0 16px 16px;
            }
            .guide-table {
                font-size: 13px;
            }
            .guide-table th,
            .guide-table td {
                padding: 10px 12px;
            }
            .brand-text {
                font-size: 18px;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
        }