/* roulang page: index */
:root {
            --primary: #1a56db;
            --primary-dark: #0f3a8e;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --text-dark: #0f172a;
            --text-body: #334155;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --radius-sm: 0.375rem;
            --radius-md: 0.75rem;
            --radius-lg: 1.25rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --spacing-section: 5rem;
        }
        html { scroll-behavior: smooth; }
        body { font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; background: var(--bg-body); color: var(--text-body); line-height: 1.7; }
        *, *::before, *::after { box-sizing: border-box; }
        a { color: inherit; text-decoration: none; transition: color 0.2s; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
        .section-padding { padding: var(--spacing-section) 0; }
        .title-gradient { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .card { background: var(--bg-white); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); transition: transform 0.3s, box-shadow 0.3s; border: 1px solid var(--border-light); }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .btn-primary { display: inline-flex; align-items: center; gap: 0.5rem; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; padding: 0.75rem 2rem; border-radius: 9999px; font-weight: 600; font-size: 1rem; border: none; cursor: pointer; transition: transform 0.2s, box-shadow 0.2s; box-shadow: 0 4px 14px rgba(26,86,219,0.35); }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,86,219,0.45); }
        .btn-primary:active { transform: translateY(0); }
        .btn-primary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
        .btn-accent { display: inline-flex; align-items: center; gap: 0.5rem; background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; padding: 0.75rem 2rem; border-radius: 9999px; font-weight: 600; font-size: 1rem; border: none; cursor: pointer; transition: transform 0.2s, box-shadow 0.2s; box-shadow: 0 4px 14px rgba(245,158,11,0.35); }
        .btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245,158,11,0.45); }
        .btn-accent:active { transform: translateY(0); }
        .btn-accent:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
        .btn-outline { display: inline-flex; align-items: center; gap: 0.5rem; background: transparent; color: var(--primary); padding: 0.7rem 1.8rem; border-radius: 9999px; font-weight: 600; font-size: 1rem; border: 2px solid var(--primary); cursor: pointer; transition: background 0.2s, color 0.2s, transform 0.2s; }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .btn-outline:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
        .badge { display: inline-block; background: rgba(26,86,219,0.08); color: var(--primary); font-size: 0.75rem; font-weight: 600; padding: 0.25rem 0.85rem; border-radius: 9999px; letter-spacing: 0.02em; }
        .badge-accent { background: rgba(245,158,11,0.12); color: var(--accent-dark); }
        .tag { display: inline-block; background: var(--bg-body); color: var(--text-muted); font-size: 0.75rem; padding: 0.2rem 0.7rem; border-radius: var(--radius-sm); border: 1px solid var(--border-light); }
        .section-title { font-size: 2.25rem; font-weight: 800; color: var(--text-dark); line-height: 1.3; margin-bottom: 0.75rem; }
        .section-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 600px; margin: 0 auto 2.5rem auto; }
        .hero-overlay { position: relative; background: linear-gradient(135deg, rgba(15,23,42,0.82) 0%, rgba(26,86,219,0.70) 100%); }
        .hero-overlay::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; background-repeat: no-repeat; opacity: 0.55; mix-blend-mode: overlay; z-index: 0; }
        .hero-content { position: relative; z-index: 1; }
        .stat-number { font-size: 2.8rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-label { font-size: 0.95rem; color: var(--text-muted); margin-top: 0.25rem; }
        .faq-item { border-bottom: 1px solid var(--border-light); padding: 1.25rem 0; }
        .faq-question { font-weight: 700; color: var(--text-dark); cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-size: 1.05rem; }
        .faq-question i { color: var(--primary); transition: transform 0.3s; }
        .faq-answer { color: var(--text-body); margin-top: 0.75rem; line-height: 1.8; padding-right: 2rem; }
        .footer-link { color: rgba(255,255,255,0.7); transition: color 0.2s; }
        .footer-link:hover { color: #fff; }
        .nav-cta-btn { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; padding: 0.5rem 1.5rem; border-radius: 9999px; font-weight: 600; font-size: 0.9rem; transition: transform 0.2s, box-shadow 0.2s; box-shadow: 0 2px 10px rgba(245,158,11,0.3); }
        .nav-cta-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(245,158,11,0.4); }
        .mobile-menu { display: none; }
        .mobile-menu.open { display: block; }
        .cover-img { width: 100%; height: 200px; object-fit: cover; border-radius: var(--radius-md) var(--radius-md) 0 0; }
        .cover-img-sm { width: 100%; height: 160px; object-fit: cover; border-radius: var(--radius-md) var(--radius-md) 0 0; }
        .flow-step { text-align: center; padding: 1.5rem; }
        .flow-step .step-number { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; font-weight: 800; font-size: 1.2rem; margin-bottom: 1rem; }
        .flow-line { position: relative; }
        .flow-line::after { content: ''; position: absolute; top: 24px; left: calc(50% + 40px); width: calc(100% - 80px); height: 2px; background: var(--border-light); display: none; }
        @media (min-width: 768px) { .flow-line::after { display: block; } }
        .flow-line:last-child::after { display: none; }
        .cta-section { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); position: relative; overflow: hidden; }
        .cta-section::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.10; mix-blend-mode: overlay; }
        .cta-content { position: relative; z-index: 1; }
        @media (max-width: 640px) {
            .section-title { font-size: 1.75rem; }
            .stat-number { font-size: 2rem; }
            .container { padding: 0 1rem; }
            .section-padding { padding: 3rem 0; }
            .hero-content h1 { font-size: 2rem !important; }
            .hero-content p { font-size: 1rem !important; }
        }
        @media (min-width: 641px) and (max-width: 1024px) {
            .section-title { font-size: 2rem; }
            .container { padding: 0 1.25rem; }
        }
        .nav-link { position: relative; font-weight: 500; padding: 0.25rem 0; color: var(--text-body); transition: color 0.2s; }
        .nav-link::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--primary); transition: width 0.3s; border-radius: 2px; }
        .nav-link:hover { color: var(--primary); }
        .nav-link:hover::after { width: 100%; }
        .nav-link.active { color: var(--primary); font-weight: 600; }
        .nav-link.active::after { width: 100%; }
        .grid-card { display: grid; gap: 1.5rem; }
        @media (min-width: 768px) { .grid-card { grid-template-columns: repeat(2, 1fr); } }
        @media (min-width: 1024px) { .grid-card.grid-3 { grid-template-columns: repeat(3, 1fr); } }
        @media (min-width: 1024px) { .grid-card.grid-4 { grid-template-columns: repeat(4, 1fr); } }
        .category-card { transition: transform 0.3s, box-shadow 0.3s; }
        .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .category-card .icon-wrap { width: 56px; height: 56px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; color: #fff; }
        .list-item { display: flex; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--border-light); }
        .list-item:last-child { border-bottom: none; }
        .list-item .item-thumb { width: 80px; height: 60px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
        .list-item .item-title { font-weight: 600; color: var(--text-dark); transition: color 0.2s; }
        .list-item .item-title:hover { color: var(--primary); }
        .list-item .item-meta { font-size: 0.8rem; color: var(--text-muted); }
        .pagination { display: flex; gap: 0.5rem; justify-content: center; margin-top: 2rem; }
        .pagination a, .pagination span { display: inline-flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; border-radius: var(--radius-sm); border: 1px solid var(--border-light); background: var(--bg-white); color: var(--text-body); font-size: 0.9rem; transition: background 0.2s, color 0.2s; }
        .pagination a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
        .pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); font-weight: 600; }
        .section-divider { width: 60px; height: 4px; background: linear-gradient(90deg, var(--primary), var(--primary-light)); border-radius: 4px; margin: 0.5rem 0 1.5rem 0; }
        .section-divider.center { margin-left: auto; margin-right: auto; }
        .bg-soft-primary { background: rgba(26,86,219,0.04); }
        .text-primary { color: var(--primary); }
        .text-accent { color: var(--accent); }
        .border-primary { border-color: var(--primary); }
        .focus-ring:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
        .empty-state { text-align: center; padding: 2rem; color: var(--text-muted); }
        .empty-state i { font-size: 2.5rem; margin-bottom: 0.75rem; opacity: 0.4; }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --gray-50: #f9fafb;
            --gray-100: #f3f4f6;
            --gray-200: #e5e7eb;
            --gray-300: #d1d5db;
            --gray-400: #9ca3af;
            --gray-500: #6b7280;
            --gray-600: #4b5563;
            --gray-700: #374151;
            --gray-800: #1f2937;
            --gray-900: #111827;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.1);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; background: var(--gray-50); color: var(--gray-900); line-height: 1.6; }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding-left: 1rem; padding-right: 1rem; }
        @media (min-width: 640px) { .container { padding-left: 1.5rem; padding-right: 1.5rem; } }
        @media (min-width: 1024px) { .container { padding-left: 2rem; padding-right: 2rem; } }
        .nav-link { position: relative; font-size: 0.95rem; font-weight: 500; color: var(--gray-600); padding: 0.5rem 0; transition: color var(--transition); }
        .nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--primary); border-radius: 1px; transition: width var(--transition); }
        .nav-link:hover { color: var(--primary); }
        .nav-link:hover::after { width: 100%; }
        .nav-link.active { color: var(--primary); }
        .nav-link.active::after { width: 100%; }
        .nav-cta-btn { display: inline-flex; align-items: center; padding: 0.6rem 1.6rem; border-radius: 999px; background: linear-gradient(135deg, #f59e0b, #d97706); color: #fff; font-weight: 600; font-size: 0.9rem; transition: all var(--transition); box-shadow: 0 4px 14px rgba(245,158,11,0.35); }
        .nav-cta-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(245,158,11,0.45); }
        .mobile-menu { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
        .mobile-menu.open { max-height: 600px; }
        .footer-link { color: var(--gray-400); transition: color var(--transition); }
        .footer-link:hover { color: #fff; }
        .article-content h2 { font-size: 1.5rem; font-weight: 700; margin-top: 2rem; margin-bottom: 1rem; color: var(--gray-900); line-height: 1.3; }
        .article-content h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: 0.75rem; color: var(--gray-800); }
        .article-content p { margin-bottom: 1.25rem; color: var(--gray-600); line-height: 1.8; font-size: 1rem; }
        .article-content ul, .article-content ol { margin-bottom: 1.25rem; padding-left: 1.5rem; color: var(--gray-600); }
        .article-content li { margin-bottom: 0.5rem; line-height: 1.7; }
        .article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-content a:hover { color: var(--primary-dark); }
        .article-content blockquote { border-left: 4px solid var(--primary); padding: 1rem 1.5rem; margin: 1.5rem 0; background: var(--gray-100); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--gray-700); font-style: italic; }
        .article-content img { border-radius: var(--radius-sm); margin: 1.5rem 0; box-shadow: var(--shadow); }
        .article-content .highlight-box { background: linear-gradient(135deg, #eff6ff, #dbeafe); border-radius: var(--radius); padding: 1.5rem; margin: 1.5rem 0; border-left: 4px solid var(--primary); }
        .article-content .highlight-box p { margin-bottom: 0; color: var(--gray-700); }
        .tag-badge { display: inline-block; padding: 0.25rem 0.8rem; border-radius: 999px; font-size: 0.8rem; font-weight: 500; background: var(--gray-100); color: var(--gray-600); transition: all var(--transition); }
        .tag-badge:hover { background: var(--primary); color: #fff; transform: translateY(-1px); }
        .tag-badge.active { background: var(--primary); color: #fff; }
        .card-hover { transition: all var(--transition); }
        .card-hover:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .cta-gradient { background: linear-gradient(135deg, #1e3a5f 0%, #1a365d 40%, #0f1f3a 100%); }
        .breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; font-size: 0.9rem; color: var(--gray-500); }
        .breadcrumb a { color: var(--gray-500); transition: color var(--transition); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .sep { color: var(--gray-300); }
        .breadcrumb .current { color: var(--gray-800); font-weight: 500; }
        @media (max-width: 767px) {
            .article-content h2 { font-size: 1.3rem; }
            .article-content p { font-size: 0.95rem; }
            .nav-cta-btn { padding: 0.5rem 1.2rem; font-size: 0.85rem; }
        }
        @media (max-width: 520px) {
            .container { padding-left: 0.75rem; padding-right: 0.75rem; }
            .article-content h2 { font-size: 1.15rem; }
        }

/* roulang page: category1 */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --bg-warm: #f8fafc;
            --text-dark: #0f172a;
            --text-muted: #64748b;
            --border-light: #e2e8f0;
            --radius: 0.75rem;
            --shadow-card: 0 2px 12px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
            --shadow-hover: 0 8px 30px rgba(0,0,0,0.10), 0 2px 8px rgba(0,0,0,0.06);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: #0f172a;
            background: #ffffff;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: #334155;
            padding: 0.5rem 0;
            transition: color 0.2s;
        }
        .nav-link:hover {
            color: #1e40af;
        }
        .nav-link.active {
            color: #1e40af;
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2.5px;
            background: #1e40af;
            border-radius: 2px;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            padding: 0.6rem 1.6rem;
            border-radius: 9999px;
            background: linear-gradient(135deg, #f59e0b, #d97706);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            transition: transform 0.2s, box-shadow 0.2s;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.45);
            color: #fff;
        }
        .mobile-menu {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .mobile-menu.open {
            max-height: 500px;
        }
        .footer-link {
            color: #94a3b8;
            transition: color 0.2s;
        }
        .footer-link:hover {
            color: #ffffff;
        }
        .card-shadow {
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.3s, transform 0.3s;
        }
        .card-shadow:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .badge {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: #0f172a;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: #64748b;
            max-width: 640px;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
            .section-subtitle {
                font-size: 1.1rem;
            }
        }
        .step-line {
            position: relative;
        }
        .step-line::before {
            content: '';
            position: absolute;
            top: 2.5rem;
            left: 1.5rem;
            bottom: 2.5rem;
            width: 2px;
            background: #e2e8f0;
        }
        .step-item:last-child .step-line::before {
            display: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary {
            list-style: none;
            cursor: pointer;
        }
        .faq-item[open] summary .fa-chevron-down {
            transform: rotate(180deg);
        }
        .banner-bg {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #1e40af 100%);
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .hover-lift {
            transition: transform 0.25s, box-shadow 0.25s;
        }
        .hover-lift:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
        }
        .gradient-gold {
            background: linear-gradient(135deg, #f59e0b, #d97706);
        }
        .gradient-blue {
            background: linear-gradient(135deg, #1e40af, #2563eb);
        }
        @media (max-width: 639px) {
            .section-title {
                font-size: 1.5rem;
            }
            .nav-cta-btn {
                padding: 0.5rem 1.2rem;
                font-size: 0.85rem;
            }
        }
        @media (min-width: 768px) and (max-width: 1023px) {
            .grid-tablet-2 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        .focus-ring:focus-visible {
            outline: 2px solid #3b82f6;
            outline-offset: 2px;
            border-radius: 4px;
        }
        .scrollbar-thin::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        .scrollbar-thin::-webkit-scrollbar-track {
            background: #f1f5f9;
            border-radius: 3px;
        }
        .scrollbar-thin::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 3px;
        }
        .scrollbar-thin::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 64, 175, 0.7) 100%);
        }
        .img-cover {
            object-fit: cover;
            width: 100%;
            height: 100%;
        }