/* roulang page: index */
:root {
            --primary: #2e5bff;
            --primary-dark: #1a3fd0;
            --primary-light: #e8eefc;
            --secondary: #00c8a0;
            --secondary-dark: #00a887;
            --accent: #ffb020;
            --dark: #0f172a;
            --bg-body: #f6f8fb;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-soft: #5b6b82;
            --text-light: #94a3b8;
            --border: #eaf0f5;
            --shadow: 0 6px 30px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.12);
            --radius: 18px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --radius-pill: 50px;
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font);
            background: var(--bg-body);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        /* 按钮 */
        .btn {
            font-weight: 600;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            transition: var(--transition);
            border: none;
        }

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

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 8px 24px rgba(46, 91, 255, 0.35);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, 0.7);
            color: #fff;
            background: transparent;
        }

        .btn-outline-light:hover,
        .btn-outline-light:focus {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
        }

        .btn-cta {
            background: var(--accent);
            color: var(--dark);
            padding: 14px 40px;
            font-size: 1.1rem;
            border-radius: var(--radius-pill);
            box-shadow: 0 8px 30px rgba(255, 176, 32, 0.35);
        }

        .btn-cta:hover,
        .btn-cta:focus {
            background: #ffa000;
            color: var(--dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(255, 176, 32, 0.5);
        }

        /* 头部导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(234, 240, 245, 0.9);
            box-shadow: 0 2px 20px rgba(15, 23, 42, 0.04);
            height: 76px;
        }

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

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: 0.5px;
        }

        .brand-logo .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 4px 16px rgba(46, 91, 255, 0.3);
        }

        .brand-logo:hover {
            color: var(--primary);
        }

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

        .main-nav .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text-soft);
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .main-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .mobile-toggle {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: var(--bg-card);
            color: var(--text);
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .mobile-toggle:hover,
        .mobile-toggle:focus {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
            outline: none;
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 640px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.72) 50%, rgba(15, 23, 42, 0.45) 100%);
        }

        .hero .hero-content {
            position: relative;
            z-index: 2;
            padding: 100px 0;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            border-radius: var(--radius-pill);
            padding: 6px 18px;
            font-size: 0.85rem;
            font-weight: 500;
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
        }

        .hero h1 {
            font-size: 3.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }

        .hero .hero-lead {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            max-width: 500px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .hero-trust {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.9rem;
        }

        .hero-trust span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .hero-trust i {
            color: var(--secondary);
        }

        /* 板块通用 */
        .section-padding {
            padding: 96px 0;
        }

        .section-bg {
            background: #fff;
        }

        .section-head {
            margin-bottom: 56px;
        }

        .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-pill);
            padding: 5px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 2.3rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .section-head p {
            color: var(--text-soft);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto;
        }

        /* 特点卡片 */
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            transition: var(--transition);
            height: 100%;
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .feature-card .icon-wrap {
            width: 70px;
            height: 70px;
            border-radius: 20px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 20px;
            transition: var(--transition);
        }

        .feature-card:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .feature-card p {
            color: var(--text-soft);
            font-size: 0.92rem;
            margin: 0;
        }

        /* 分类卡片 */
        .cat-card {
            display: block;
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--dark);
            color: #fff;
            text-decoration: none;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }

        .cat-card img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            transition: var(--transition);
            opacity: 0.7;
        }

        .cat-card:hover img {
            transform: scale(1.05);
            opacity: 0.5;
        }

        .cat-card-body {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 40px 32px 32px;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.92) 0%, transparent 100%);
        }

        .cat-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .cat-card p {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 16px;
            max-width: 90%;
        }

        .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
            font-weight: 600;
            font-size: 0.95rem;
        }

        .cat-link i {
            transition: var(--transition);
        }

        .cat-card:hover .cat-link i {
            transform: translateX(5px);
        }

        /* 文章卡片 */
        .post-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
        }

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

        .post-card-cover {
            position: relative;
            overflow: hidden;
            height: 200px;
        }

        .post-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .post-card-body {
            padding: 24px;
        }

        .post-card-cat {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-pill);
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .post-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .post-card-title a {
            color: var(--dark);
        }

        .post-card-title a:hover {
            color: var(--primary);
        }

        .post-card-desc {
            color: var(--text-soft);
            font-size: 0.9rem;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .post-card-time {
            color: var(--text-light);
            font-size: 0.82rem;
        }

        .post-card-link {
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
        }

        .post-card-link i {
            transition: var(--transition);
        }

        .post-card-link:hover i {
            transform: translateX(3px);
        }

        /* 数据统计 */
        .stats-section {
            background: var(--dark);
            position: relative;
            background-size: cover;
            background-position: center;
        }

        .stats-section .stats-overlay {
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.88);
        }

        .stats-section .container {
            position: relative;
            z-index: 2;
        }

        .stat-item {
            text-align: center;
            padding: 40px 20px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
            height: 100%;
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }

        .stat-item .number {
            display: block;
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-item .number small {
            font-size: 1.4rem;
            color: var(--secondary);
        }

        .stat-item .label {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
        }

        /* 流程 */
        .process-item {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: var(--transition);
            height: 100%;
            position: relative;
        }

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

        .step-num {
            display: inline-block;
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 48px;
            margin-bottom: 18px;
            box-shadow: 0 6px 20px rgba(46, 91, 255, 0.3);
        }

        .process-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .process-item p {
            color: var(--text-soft);
            font-size: 0.9rem;
            margin: 0;
        }

        /* FAQ */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: none;
            background: var(--bg-card);
        }

        .faq-accordion .accordion-button {
            padding: 20px 24px;
            font-weight: 600;
            color: var(--dark);
            background: var(--bg-card);
            font-size: 1rem;
            box-shadow: none;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary);
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(46, 91, 255, 0.15);
            border-radius: var(--radius-md);
        }

        .faq-accordion .accordion-button::after {
            background-size: 16px;
        }

        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-soft);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* CTA */
        .cta-section {
            position: relative;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .cta-section .cta-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(46, 91, 255, 0.92), rgba(0, 200, 160, 0.85));
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            color: #fff;
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.9);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 30px;
        }

        /* 页脚 */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
        }

        .site-footer .footer-brand .footer-logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            display: block;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand p {
            font-size: 0.92rem;
            max-width: 320px;
            line-height: 1.8;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 18px;
        }

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

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.92rem;
            transition: var(--transition);
        }

        .site-footer ul li a:hover {
            color: var(--secondary);
            padding-left: 5px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 48px;
            padding: 20px 0;
            text-align: center;
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.85rem;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* 移动端导航 */
        @media (max-width: 991.98px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 76px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 16px;
                gap: 4px;
                box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
                border-bottom: 1px solid var(--border);
            }

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

            .main-nav .nav-link {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                width: 100%;
            }

            .hero h1 {
                font-size: 2.4rem;
            }

            .hero .hero-lead {
                font-size: 1rem;
            }

            .section-padding {
                padding: 64px 0;
            }

            .section-head h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding: 0 16px;
            }

            .hero {
                min-height: 520px;
            }

            .hero .hero-content {
                padding: 60px 0;
            }

            .hero h1 {
                font-size: 1.9rem;
            }

            .hero .hero-lead {
                font-size: 0.95rem;
            }

            .hero-trust {
                gap: 14px;
                font-size: 0.82rem;
            }

            .section-padding {
                padding: 48px 0;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .section-head h2 {
                font-size: 1.5rem;
            }

            .cat-card img {
                height: 260px;
            }

            .post-card-cover {
                height: 180px;
            }

            .stat-item .number {
                font-size: 2rem;
            }

            .cta-section h2 {
                font-size: 1.7rem;
            }

            .site-footer {
                padding-top: 48px;
            }
        }

/* roulang page: article */
:root {
            --primary: #0d6efd;
            --primary-hover: #0b5ed7;
            --primary-light: #e7f1ff;
            --secondary: #6c757d;
            --accent: #ffc107;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --text-main: #212529;
            --text-muted: #6c757d;
            --border-color: #dee2e6;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 4px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
            --space-section: 5rem;
            --space-block: 3rem;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-white);
            -webkit-font-smoothing: antialiased;
        }
        
        a {
            text-decoration: none;
            color: var(--primary);
            transition: color 0.2s ease;
        }
        
        a:hover {
            color: var(--primary-hover);
        }
        
        img {
            max-width: 100%;
            height: auto;
        }
        
        .container {
            max-width: 1140px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* Header / Nav */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 0;
            flex-wrap: wrap;
        }
        
        .nav-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .nav-logo i {
            color: var(--primary);
        }
        
        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 0.25rem;
            margin: 0;
            padding: 0;
        }
        
        .nav-link {
            display: inline-block;
            padding: 0.5rem 1rem;
            font-weight: 500;
            color: var(--text-main);
            border-radius: 8px;
            transition: all 0.25s ease;
        }
        
        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        
        .nav-link.active {
            background: var(--primary);
            color: #fff;
        }
        
        /* Breadcrumb */
        .breadcrumb-wrap {
            background: linear-gradient(135deg, #f0f4ff 0%, var(--primary-light) 100%);
            padding: 2rem 0;
            margin-bottom: 0;
        }
        
        .breadcrumb {
            margin: 0;
            font-size: 0.95rem;
        }
        
        .breadcrumb-item a {
            color: var(--primary);
            font-weight: 500;
        }
        
        .breadcrumb-item.active {
            color: var(--secondary);
        }
        
        /* Article Hero */
        .article-hero {
            background: linear-gradient(135deg, #1a1f36 0%, #0d6efd 100%);
            padding: 4rem 0 3rem;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        
        .article-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
        }
        
        .article-hero .container {
            position: relative;
            z-index: 1;
        }
        
        .article-hero .badge {
            background: rgba(255, 255, 255, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-weight: 500;
            padding: 0.4rem 0.8rem;
            border-radius: 50px;
        }
        
        .article-hero h1 {
            font-size: 2rem;
            font-weight: 700;
            margin-top: 1rem;
            margin-bottom: 0.8rem;
            line-height: 1.4;
        }
        
        .article-hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.85);
        }
        
        /* Article Content */
        .article-main {
            padding: var(--space-section) 0;
        }
        
        .article-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            box-shadow: var(--shadow-sm);
        }
        
        .article-card .content {
            font-size: 1.02rem;
            line-height: 1.9;
        }
        
        .article-card .content p {
            margin-bottom: 1.5rem;
        }
        
        .article-card .content h2 {
            font-size: 1.5rem;
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--text-main);
            font-weight: 700;
        }
        
        .article-card .content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
        }
        
        /* Sidebar */
        .sidebar-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
            margin-bottom: 1.5rem;
        }
        
        .sidebar-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1rem;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid var(--primary);
            display: inline-block;
        }
        
        .sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .sidebar-list li {
            padding: 0.6rem 0;
            border-bottom: 1px dashed var(--border-color);
        }
        
        .sidebar-list li:last-child {
            border-bottom: none;
        }
        
        .sidebar-list a {
            color: var(--text-main);
            font-size: 0.95rem;
            transition: all 0.2s ease;
            display: block;
        }
        
        .sidebar-list a:hover {
            color: var(--primary);
            padding-left: 0.25rem;
        }
        
        /* Tags */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        
        .tag {
            display: inline-block;
            padding: 0.3rem 0.75rem;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: all 0.2s ease;
            border: 1px solid transparent;
        }
        
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        
        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #e7f1ff 0%, #f8f9fa 100%);
            padding: 3rem 0;
            border-radius: var(--radius-lg);
            margin-top: 2rem;
        }
        
        /* Footer */
        .site-footer {
            background: #1a1f36;
            color: #aab0c0;
            padding: 3rem 0 1.5rem;
            font-size: 0.95rem;
        }
        
        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 1rem;
            font-weight: 600;
        }
        
        .site-footer a {
            color: #aab0c0;
            transition: color 0.2s ease;
        }
        
        .site-footer a:hover {
            color: #fff;
            text-decoration: none;
        }
        
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .site-footer ul li {
            padding: 0.25rem 0;
        }
        
        .footer-brand {
            margin-bottom: 1rem;
        }
        
        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .footer-logo i {
            color: var(--primary);
        }
        
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1.5rem;
            margin-top: 2rem;
            text-align: center;
            font-size: 0.85rem;
        }
        
        .font-size-sm {
            font-size: 0.85rem;
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --space-section: 4rem;
            }
            
            .article-card {
                padding: 2rem;
            }
        }
        
        @media (max-width: 768px) {
            :root {
                --space-section: 3rem;
            }
            
            .main-nav {
                flex-direction: column;
                gap: 0.8rem;
            }
            
            .nav-links {
                width: 100%;
                justify-content: center;
                flex-wrap: wrap;
            }
            
            .article-hero h1 {
                font-size: 1.5rem;
            }
            
            .article-card {
                padding: 1.5rem;
            }
            
            .article-hero .meta {
                gap: 1rem;
                font-size: 0.85rem;
            }
        }
        
        @media (max-width: 520px) {
            .article-card {
                padding: 1rem;
            }
            
            .article-hero h1 {
                font-size: 1.3rem;
            }
            
            .article-hero {
                padding: 2.5rem 0 2rem;
            }
            
            .sidebar-card {
                padding: 1rem;
            }
            
            .breadcrumb-wrap {
                padding: 1.2rem 0;
            }
        }
        
        /* Focus states */
        a:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        
        .btn:focus-visible {
            box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.5);
        }
        
        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .fade-in-up {
            animation: fadeInUp 0.5s ease-out;
        }

/* roulang page: category1 */
:root {
            --primary: #0d9488;
            --primary-dark: #0f766e;
            --primary-light: #ccfbf1;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg-body: #f6f8fb;
            --bg-white: #ffffff;
            --bg-soft: #f0fdfa;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --radius-lg: 22px;
            --radius-md: 14px;
            --radius-sm: 9px;
            --shadow-sm: 0 2px 10px rgba(0, 0, 0, .05);
            --shadow-md: 0 10px 30px rgba(0, 0, 0, .08);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, .10);
            --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;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input {
            font-family: inherit;
        }

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

        .section {
            padding: 90px 0;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            letter-spacing: .5px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 12px rgba(0, 0, 0, .04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

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

        .brand-logo {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), #14b8a6);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 6px 16px rgba(13, 148, 136, .25);
        }

        .brand-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: .5px;
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 auto;
        }

        .nav-link {
            display: inline-block;
            padding: 10px 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: 50px;
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-link.active {
            color: var(--primary-dark);
            background: var(--primary-light);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 4px;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }

        .header-cta {
            padding: 10px 26px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            border: none;
            box-shadow: 0 6px 18px rgba(13, 148, 136, .25);
            transition: var(--transition);
            white-space: nowrap;
        }

        .header-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(13, 148, 136, .32);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            font-size: 24px;
            color: var(--text-main);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 110px 0 100px;
            background: linear-gradient(rgba(15, 23, 42, .55), rgba(15, 23, 42, .65)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 148, 136, .35) 0%, rgba(15, 23, 42, .5) 100%);
        }

        .banner-content {
            position: relative;
            z-index: 2;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, .15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, .25);
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 1px;
            margin-bottom: 22px;
        }

        .banner-badge i {
            color: var(--accent);
        }

        .page-banner h1 {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, .25);
        }

        .page-banner p {
            font-size: 17px;
            max-width: 640px;
            margin: 0 auto;
            opacity: .92;
            line-height: 1.9;
        }

        .breadcrumb-bar {
            margin-top: 28px;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            font-size: 14px;
        }

        .breadcrumb-bar a {
            color: rgba(255, 255, 255, .75);
        }

        .breadcrumb-bar a:hover {
            color: #fff;
        }

        .breadcrumb-bar .sep {
            opacity: .5;
        }

        .breadcrumb-bar .current {
            color: #fff;
            font-weight: 500;
        }

        /* ===== Overview Feature Block ===== */
        .feature-block {
            display: flex;
            align-items: center;
            gap: 60px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 56px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }

        .feature-media {
            flex: 1;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .feature-media img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .feature-media:hover img {
            transform: scale(1.03);
        }

        .feature-content {
            flex: 1;
        }

        .feature-content h3 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .feature-content p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 16px;
        }

        .feature-list {
            list-style: none;
            margin-top: 18px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 15px;
            color: var(--text-main);
            border-bottom: 1px dashed var(--border-color);
        }

        .feature-list li:last-child {
            border-bottom: none;
        }

        .feature-list li i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ===== Function Cards ===== */
        .function-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .function-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(13, 148, 136, .25);
        }

        .function-media {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .function-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, .25));
        }

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

        .function-card:hover .function-media img {
            transform: scale(1.05);
        }

        .function-body {
            padding: 28px 24px 30px;
        }

        .function-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 18px;
        }

        .function-body h4 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .function-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--bg-white);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

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

        .step-item {
            position: relative;
            background: var(--bg-soft);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid rgba(13, 148, 136, .15);
            transition: var(--transition);
        }

        .step-item:hover {
            background: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 6px 16px rgba(13, 148, 136, .28);
        }

        .step-item h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }

        .step-arrow {
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary-light);
            font-size: 20px;
            z-index: 2;
        }

        /* ===== Stats ===== */
        .stats-section {
            position: relative;
            background: linear-gradient(rgba(15, 23, 42, .78), rgba(15, 23, 42, .82)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            background-attachment: fixed;
            color: #fff;
            padding: 90px 0;
        }

        .stats-section .section-title {
            color: #fff;
        }

        .stats-section .section-desc {
            color: rgba(255, 255, 255, .8);
        }

        .stats-section .section-tag {
            background: rgba(255, 255, 255, .15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .2);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 44px;
        }

        .stat-item {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .15);
            border-radius: var(--radius-lg);
            padding: 34px 20px;
            text-align: center;
            backdrop-filter: blur(6px);
            transition: var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, .14);
            transform: translateY(-4px);
        }

        .stat-num {
            font-size: 38px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 4px;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
            letter-spacing: .5px;
        }

        /* ===== FAQ ===== */
        .faq-wrapper {
            max-width: 840px;
            margin: 0 auto;
        }

        .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 16px;
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

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

        .accordion-button {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            padding: 20px 24px;
            background: var(--bg-white);
            border: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(13, 148, 136, .15);
        }

        .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary-dark);
            box-shadow: none;
        }

        .accordion-body {
            padding: 20px 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.85;
            border-top: 1px solid var(--border-color);
            background: #fafdfd;
        }

        .accordion-button::after {
            background-size: 14px;
            opacity: .6;
        }

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

        .cta-box {
            background: linear-gradient(135deg, var(--primary) 0%, #14b8a6 60%, #2dd4bf 100%);
            border-radius: var(--radius-lg);
            padding: 70px 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(13, 148, 136, .3);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
            top: -80px;
            right: -60px;
        }

        .cta-box::after {
            content: '';
            position: absolute;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .05);
            bottom: -50px;
            left: -30px;
        }

        .cta-box h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            position: relative;
            z-index: 2;
        }

        .cta-box p {
            font-size: 16px;
            color: rgba(255, 255, 255, .92);
            margin-bottom: 30px;
            position: relative;
            z-index: 2;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-btn {
            display: inline-block;
            background: #fff;
            color: var(--primary-dark) !important;
            padding: 14px 40px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            box-shadow: 0 8px 24px rgba(0, 0, 0, .15);
            transition: var(--transition);
            position: relative;
            z-index: 2;
        }

        .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, .2);
            background: var(--accent-light);
        }

        .cta-btn i {
            margin-right: 8px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, .75);
            padding: 60px 0 0;
            margin-top: 0;
        }

        .site-footer .container {
            padding-bottom: 32px;
        }

        .footer-brand {
            margin-bottom: 20px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-logo i {
            color: #2dd4bf;
            font-size: 20px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .65);
            margin-bottom: 0;
        }

        .site-footer h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .site-footer h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }

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

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul li a {
            color: rgba(255, 255, 255, .7);
            font-size: 14px;
            transition: var(--transition);
        }

        .site-footer ul li a:hover {
            color: #fff;
            padding-left: 6px;
        }

        .font-size-sm {
            font-size: 13px;
            color: rgba(255, 255, 255, .55);
            line-height: 1.7;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 18px 0;
            text-align: center;
        }

        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 72px 0;
            }

            .feature-block {
                flex-direction: column;
                padding: 40px 32px;
                gap: 36px;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .step-arrow {
                display: none;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

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

            .nav-toggle {
                display: block;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                gap: 6px;
                box-shadow: 0 12px 28px rgba(0, 0, 0, .12);
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 999;
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .main-nav .nav-link {
                display: block;
                padding: 14px 20px;
                text-align: center;
                border-radius: 10px;
            }

            .header-cta {
                display: none;
            }

            .page-banner {
                padding: 80px 0;
            }

            .page-banner h1 {
                font-size: 32px;
            }

            .page-banner p {
                font-size: 15px;
            }

            .section-title {
                font-size: 28px;
            }

            .feature-block {
                padding: 24px 20px;
            }

            .feature-media img {
                height: 220px;
            }

            .function-media {
                height: 170px;
            }

            .cta-box {
                padding: 44px 28px;
                border-radius: var(--radius-md);
            }

            .cta-box h2 {
                font-size: 24px;
            }

            .stats-section {
                background-attachment: scroll;
                padding: 64px 0;
            }

            .site-footer {
                text-align: left;
            }
        }

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

            .section {
                padding: 56px 0;
            }

            .section-head {
                margin-bottom: 34px;
            }

            .section-title {
                font-size: 24px;
            }

            .brand-text {
                font-size: 18px;
            }

            .brand-logo {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }

            .page-banner h1 {
                font-size: 26px;
            }

            .page-banner p {
                font-size: 14px;
            }

            .steps-grid,
            .stats-grid {
                grid-template-columns: 1fr;
            }

            .feature-list li {
                font-size: 14px;
            }

            .cta-box p {
                font-size: 14px;
            }

            .cta-btn {
                padding: 12px 28px;
                font-size: 14px;
            }

            .footer-bottom p {
                font-size: 12px;
            }
        }

        /* ===== Utility ===== */
        .shadow-hover {
            transition: var(--transition);
        }

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

        .mt-3 {
            margin-top: 16px;
        }

        .mb-4 {
            margin-bottom: 24px;
        }

        .text-center {
            text-align: center;
        }

        .fa-fish {
            margin-right: 4px;
        }

/* roulang page: category2 */
:root {
            --primary: #0ea5e9;
            --primary-dark: #0284c7;
            --accent: #22d3ee;
            --dark-bg: #0b1428;
            --body-bg: #f4f7fb;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --card-bg: #ffffff;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
            --transition: all 0.25s ease;
            --section-space: 88px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--body-bg);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        button:focus,
        a:focus,
        input:focus,
        textarea:focus {
            outline: 3px solid rgba(14, 165, 233, 0.35);
            outline-offset: 2px;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .custom-navbar {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            padding: 12px 0;
            transition: var(--transition);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .custom-navbar.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
        }

        .navbar-brand.custom-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -0.5px;
            line-height: 1.2;
            padding: 0;
            margin: 0;
        }

        .navbar-brand.custom-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(14, 165, 233, 0.35);
            flex-shrink: 0;
        }

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

        .main-nav .nav-link {
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            border: 1px solid transparent;
            background: transparent;
            display: inline-flex;
            align-items: center;
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(14, 165, 233, 0.08);
            border-color: rgba(14, 165, 233, 0.18);
        }

        .main-nav .nav-link.active {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            border-color: transparent;
            box-shadow: 0 6px 16px rgba(34, 211, 238, 0.3);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            box-shadow: 0 6px 16px rgba(14, 165, 233, 0.3);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(14, 165, 233, 0.4);
            color: #fff;
        }

        .navbar-toggler {
            border: none;
            background: rgba(14, 165, 233, 0.1);
            width: 42px;
            height: 42px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.2rem;
            padding: 0;
            box-shadow: none;
        }

        .navbar-toggler:hover {
            background: rgba(14, 165, 233, 0.18);
        }

        .navbar-toggler:focus {
            box-shadow: none;
        }

        .category-hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(120deg, rgba(2, 12, 32, 0.92), rgba(14, 116, 144, 0.78)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -60%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.3), transparent 60%);
            pointer-events: none;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            backdrop-filter: blur(6px);
            margin-bottom: 22px;
        }

        .hero-badge i {
            color: var(--accent);
        }

        .category-hero h1 {
            font-size: clamp(2.2rem, 4vw, 3.4rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -1px;
            margin-bottom: 16px;
        }

        .category-hero .lead {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.82);
            max-width: 640px;
            margin-bottom: 32px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            font-size: 0.9rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: rgba(255, 255, 255, 0.9);
        }

        .hero-meta .meta-item i {
            color: var(--accent);
        }

        .section {
            padding: var(--section-space) 0;
        }

        .section-alt {
            background: #fff;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-head-center {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-title {
            font-size: clamp(1.6rem, 2.5vw, 2.2rem);
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 680px;
            margin: 0 auto;
        }

        .play-tabs-bar {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 46px;
        }

        .tab-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 999px;
            background: #fff;
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.92rem;
            font-weight: 600;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            cursor: default;
        }

        .tab-chip i {
            color: var(--primary);
        }

        .tab-chip:hover {
            border-color: rgba(14, 165, 233, 0.35);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            color: var(--text-main);
        }

        .play-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .play-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(14, 165, 233, 0.3);
        }

        .play-card .card-cover {
            height: 200px;
            overflow: hidden;
            position: relative;
            background: var(--dark-bg);
        }

        .play-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .play-card .card-cover .cover-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(2, 6, 23, 0.65);
            color: #fff;
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

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

        .play-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .play-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            flex: 1;
            margin-bottom: 16px;
        }

        .play-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            margin-top: auto;
        }

        .card-meta .meta-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .step-section {
            background: linear-gradient(120deg, #0b1428, #0c2d40);
            color: #fff;
        }

        .step-section .section-title {
            color: #fff;
        }

        .step-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .step-item {
            text-align: center;
            padding: 32px 20px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            height: 100%;
            transition: var(--transition);
            position: relative;
        }

        .step-item:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-4px);
        }

        .step-num {
            width: 56px;
            height: 56px;
            margin: 0 auto 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 8px 20px rgba(34, 211, 238, 0.35);
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 10px;
            color: #fff;
        }

        .step-item p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            margin: 0;
        }

        .stats-band {
            background: #fff;
            border-bottom: 1px solid var(--border-color);
            padding: 56px 0;
        }

        .stat-item {
            text-align: center;
            padding: 24px 16px;
        }

        .stat-item .stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.1;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-item .stat-label {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        .faq-section {
            background: var(--body-bg);
        }

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

        .accordion-item:hover {
            border-color: rgba(14, 165, 233, 0.35);
        }

        .accordion-button {
            background: #fff;
            color: var(--text-main);
            font-weight: 600;
            font-size: 1rem;
            padding: 20px 24px;
            box-shadow: none;
            border: none;
            transition: var(--transition);
        }

        .accordion-button:not(.collapsed) {
            background: rgba(14, 165, 233, 0.04);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            outline: 3px solid rgba(14, 165, 233, 0.25);
            outline-offset: -2px;
        }

        .accordion-button::after {
            background-image: none;
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            content: '\f107';
            color: var(--primary);
            transition: var(--transition);
            width: 20px;
            height: 20px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(-180deg);
        }

        .accordion-body {
            padding: 0 24px 22px;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 1px dashed var(--border-color);
            margin: 0 24px;
            padding-left: 0;
            padding-right: 0;
            line-height: 1.8;
        }

        .cta-banner {
            background: linear-gradient(120deg, #0b1428, #0e7490);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.25), transparent 60%);
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -60%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(14, 165, 233, 0.2), transparent 60%);
        }

        .cta-banner h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            color: rgba(255, 255, 255, 0.82);
            max-width: 620px;
            margin: 0 auto 30px;
            font-size: 1.05rem;
            position: relative;
            z-index: 1;
        }

        .btn-group-custom {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 8px 20px rgba(34, 211, 238, 0.35);
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-primary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(34, 211, 238, 0.45);
            color: #fff;
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
            background: transparent;
            transition: var(--transition);
            cursor: pointer;
        }

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

        .site-footer {
            background: #08101f;
            color: rgba(255, 255, 255, 0.75);
            padding: 70px 0 0;
            position: relative;
        }

        .site-footer .footer-brand .footer-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .site-footer .footer-logo i {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
        }

        .site-footer .footer-brand p {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.92rem;
            margin-top: 16px;
            max-width: 320px;
            line-height: 1.7;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 12px;
        }

        .site-footer h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

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

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.92rem;
            transition: var(--transition);
        }

        .site-footer ul a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .site-footer .font-size-sm {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            margin-top: 56px;
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom p {
            margin-bottom: 0;
        }

        @media (max-width: 991.98px) {
            .category-hero {
                padding: 90px 0 72px;
            }

            .navbar-collapse {
                padding: 16px 0 8px;
            }

            .main-nav {
                flex-direction: column;
                width: 100%;
                align-items: stretch;
                gap: 6px;
            }

            .main-nav .nav-link {
                width: 100%;
                text-align: center;
                padding: 12px 20px;
                border-radius: 12px;
                justify-content: center;
            }

            .nav-cta-wrap {
                width: 100%;
                margin-top: 14px;
            }

            .nav-cta {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --section-space: 60px;
            }

            .category-hero {
                padding: 70px 0 56px;
            }

            .category-hero h1 {
                font-size: 2rem;
            }

            .category-hero .lead {
                font-size: 1rem;
            }

            .stat-item .stat-num {
                font-size: 2rem;
            }

            .cta-banner {
                padding: 40px 28px;
            }

            .btn-primary-custom,
            .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding: 0 16px;
            }

            .hero-meta {
                flex-direction: column;
            }

            .hero-meta .meta-item {
                width: 100%;
            }

            .play-card .card-cover {
                height: 180px;
            }

            .play-tabs-bar {
                gap: 8px;
            }

            .tab-chip {
                padding: 8px 16px;
                font-size: 0.85rem;
            }

            .accordion-button {
                padding: 16px 18px;
                font-size: 0.95rem;
            }

            .accordion-body {
                margin: 0 18px;
            }
        }