/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e2a4a;
            --primary-light: #2c3e6b;
            --primary-dark: #0f1829;
            --secondary: #c9a84c;
            --secondary-light: #e0c77a;
            --secondary-dark: #a8892e;
            --accent: #e8d5b7;
            --bg-cream: #f7f5f0;
            --bg-light: #ffffff;
            --bg-dark: #1a1a2e;
            --text-dark: #1a1a2e;
            --text-body: #2d2d44;
            --text-muted: #6b7280;
            --text-light: #f7f5f0;
            --border-light: #e5e0d8;
            --border-medium: #d0c8bc;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: var(--bg-cream);
            line-height: 1.7;
            font-size: 1rem;
        }

        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--secondary); }
        a:focus-visible { outline: 2px solid var(--secondary); outline-offset: 2px; border-radius: 2px; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--secondary); outline-offset: 2px; }

        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        @media (max-width: 768px) {
            .container-custom { padding: 0 var(--spacing-sm); }
        }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text-dark); }
        h1 { font-size: 3rem; letter-spacing: -0.02em; }
        h2 { font-size: 2.25rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 1rem; }
        .text-muted { color: var(--text-muted); }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--secondary);
            margin-bottom: var(--spacing-xs);
        }

        .section-title {
            margin-bottom: var(--spacing-sm);
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
        }

        /* ===== Button ===== */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.7rem 1.8rem;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-custom:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); text-decoration: none; }
        .btn-custom:active { transform: translateY(0); }

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

        .btn-secondary-custom {
            background: var(--secondary);
            color: #fff;
        }
        .btn-secondary-custom:hover { background: var(--secondary-light); color: #fff; }

        .btn-outline-custom {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline-custom:hover { background: var(--primary); color: #fff; }

        .btn-light-custom {
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(4px);
            color: #fff;
            border: 1px solid rgba(255,255,255,0.25);
        }
        .btn-light-custom:hover { background: rgba(255,255,255,0.28); color: #fff; }

        .btn-lg { padding: 1rem 2.5rem; font-size: 1.1rem; border-radius: var(--radius-md); }

        /* ===== Badge / Tag ===== */
        .badge-tag {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 100px;
            background: var(--accent);
            color: var(--primary-dark);
            letter-spacing: 0.02em;
        }
        .badge-tag.gold { background: var(--secondary); color: #fff; }
        .badge-tag.outline { background: transparent; border: 1px solid var(--border-medium); color: var(--text-muted); }

        /* ===== Card ===== */
        .card-custom {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            overflow: hidden;
            border: 1px solid var(--border-light);
        }
        .card-custom:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .card-custom .card-img-top { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
        .card-custom .card-body { padding: var(--spacing-sm); }
        .card-custom .card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.4rem; }
        .card-custom .card-text { font-size: 0.9rem; color: var(--text-muted); }
        .card-custom .card-footer { background: transparent; border-top: 1px solid var(--border-light); padding: var(--spacing-sm); }

        /* ===== Header / Nav ===== */
        .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 var(--border-light);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.6rem 0;
            gap: var(--spacing-sm);
        }

        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .navbar-brand:hover { color: var(--primary-light); }
        .navbar-brand .brand-icon { color: var(--secondary); font-size: 1.6rem; }

        .nav-tabs-custom {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
            background: var(--bg-cream);
            border-radius: var(--radius-xl);
            padding: 0.25rem;
        }
        .nav-tabs-custom .nav-item { margin: 0; }
        .nav-tabs-custom .nav-link {
            display: block;
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-muted);
            border-radius: 100px;
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-tabs-custom .nav-link:hover { color: var(--primary); background: rgba(30,42,74,0.05); }
        .nav-tabs-custom .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .nav-tabs-custom .nav-link.active:hover { color: #fff; }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }
        .nav-cta .btn-custom { padding: 0.5rem 1.2rem; font-size: 0.85rem; }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.25rem;
        }

        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-tabs-custom {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: var(--spacing-sm);
                right: var(--spacing-sm);
                background: var(--bg-light);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-lg);
                padding: 0.5rem;
                border: 1px solid var(--border-light);
                margin-top: 0.5rem;
            }
            .nav-tabs-custom.open { display: flex; }
            .nav-tabs-custom .nav-link { padding: 0.7rem 1.2rem; width: 100%; }
            .nav-cta { display: none; }
            .navbar-brand { font-size: 1.25rem; }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .nav-tabs-custom .nav-link { padding: 0.45rem 1rem; font-size: 0.8rem; }
            .navbar-brand { font-size: 1.3rem; }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,24,41,0.82) 0%, rgba(30,42,74,0.6) 50%, rgba(0,0,0,0.3) 100%);
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0; right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-cream) 0%, transparent 100%);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            width: 100%;
            padding: var(--spacing-xl) 0;
        }
        .hero-content .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.35rem 1rem;
            background: rgba(201,168,76,0.2);
            border: 1px solid rgba(201,168,76,0.3);
            border-radius: 100px;
            color: var(--secondary-light);
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: var(--spacing-sm);
            backdrop-filter: blur(4px);
        }
        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            line-height: 1.1;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .hero-content h1 .highlight { color: var(--secondary-light); }
        .hero-content .hero-desc {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.85);
            max-width: 580px;
            margin-bottom: var(--spacing-md);
            line-height: 1.6;
            text-shadow: 0 1px 8px rgba(0,0,0,0.2);
        }
        .hero-content .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            align-items: center;
        }
        .hero-content .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            margin-top: var(--spacing-md);
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .hero-content .hero-meta i { color: var(--secondary-light); margin-right: 0.3rem; }

        @media (max-width: 768px) {
            .hero-section { min-height: 70vh; }
            .hero-content h1 { font-size: 2rem; }
            .hero-content .hero-desc { font-size: 1rem; }
            .hero-content .hero-cta { flex-direction: column; align-items: stretch; }
            .hero-content .hero-meta { gap: var(--spacing-sm); flex-direction: column; }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .hero-content h1 { font-size: 2.8rem; }
        }

        /* ===== Section Spacing ===== */
        .section-block { padding: var(--spacing-xl) 0; }
        .section-block.alt-bg { background: var(--bg-light); }
        .section-block.dark-bg { background: var(--primary-dark); color: var(--text-light); }
        .section-block.dark-bg h2, .section-block.dark-bg h3 { color: #fff; }
        .section-block.dark-bg .text-muted { color: rgba(255,255,255,0.6); }

        @media (max-width: 768px) {
            .section-block { padding: var(--spacing-lg) 0; }
        }

        /* ===== Grid / Columns ===== */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-md); }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); }

        @media (max-width: 768px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
        }

        /* ===== Feature / Icon Cards ===== */
        .feature-card {
            text-align: center;
            padding: var(--spacing-md);
            background: var(--bg-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .feature-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .feature-card .icon-wrap {
            width: 60px;
            height: 60px;
            margin: 0 auto var(--spacing-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: var(--primary);
            font-size: 1.6rem;
            transition: all var(--transition);
        }
        .feature-card:hover .icon-wrap { background: var(--primary); color: #fff; }
        .feature-card h3 { font-size: 1.1rem; margin-bottom: 0.4rem; }
        .feature-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== Stat / Data Block ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }
        .stat-item { text-align: center; }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.1;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-sm); }
            .stat-item .stat-number { font-size: 2rem; }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
        }

        /* ===== Timeline / Process ===== */
        .timeline { position: relative; padding-left: 2rem; }
        .timeline::before {
            content: '';
            position: absolute;
            left: 7px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border-medium);
        }
        .timeline-item {
            position: relative;
            padding-bottom: var(--spacing-md);
        }
        .timeline-item:last-child { padding-bottom: 0; }
        .timeline-item .dot {
            position: absolute;
            left: -2rem;
            top: 0.25rem;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--secondary);
            border: 3px solid var(--bg-cream);
            box-shadow: 0 0 0 2px var(--secondary);
        }
        .timeline-item h4 { font-size: 1.05rem; margin-bottom: 0.2rem; }
        .timeline-item p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: var(--spacing-sm) 0;
        }
        .faq-item:first-child { padding-top: 0; }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 0.25rem 0;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: var(--spacing-sm);
        }
        .faq-question i { color: var(--secondary); transition: transform var(--transition); font-size: 1rem; }
        .faq-question.open i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            font-size: 0.95rem;
            color: var(--text-muted);
            padding: 0;
        }
        .faq-answer.open { max-height: 300px; padding: var(--spacing-xs) 0 0; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,42,74,0.88) 0%, rgba(15,24,41,0.78) 100%);
        }
        .cta-section .container-custom { position: relative; z-index: 2; }
        .cta-section h2 { color: #fff; }
        .cta-section p { color: rgba(255,255,255,0.8); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.7);
            padding: var(--spacing-lg) 0 var(--spacing-md);
        }
        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--spacing-xs);
        }
        .site-footer .footer-desc { font-size: 0.9rem; max-width: 360px; }
        .site-footer h5 { color: #fff; font-size: 0.95rem; margin-bottom: var(--spacing-sm); }
        .site-footer a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
        .site-footer a:hover { color: var(--secondary-light); }
        .site-footer .footer-links { list-style: none; padding: 0; margin: 0; }
        .site-footer .footer-links li { margin-bottom: 0.4rem; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: var(--spacing-sm);
            margin-top: var(--spacing-md);
            font-size: 0.85rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: var(--spacing-xs);
        }

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

        /* ===== News / Post List ===== */
        .post-item {
            display: flex;
            gap: var(--spacing-sm);
            padding: var(--spacing-sm) 0;
            border-bottom: 1px solid var(--border-light);
            align-items: flex-start;
        }
        .post-item:first-child { padding-top: 0; }
        .post-item:last-child { border-bottom: none; }
        .post-item .post-thumb {
            width: 120px;
            height: 80px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--border-light);
        }
        .post-item .post-info { flex: 1; min-width: 0; }
        .post-item .post-title {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-dark);
            margin-bottom: 0.2rem;
            display: block;
            text-decoration: none;
            transition: color var(--transition);
        }
        .post-item .post-title:hover { color: var(--secondary); }
        .post-item .post-excerpt {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.2rem;
        }
        .post-item .post-meta {
            font-size: 0.75rem;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            align-items: center;
        }
        .post-item .post-meta .badge-tag { font-size: 0.65rem; padding: 0.15rem 0.6rem; }

        @media (max-width: 520px) {
            .post-item { flex-direction: column; }
            .post-item .post-thumb { width: 100%; height: 140px; }
        }

        /* ===== Category Chip List ===== */
        .chip-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            justify-content: center;
        }
        .chip-item {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.6rem 1.4rem;
            border-radius: 100px;
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-body);
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .chip-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .chip-item i { color: var(--secondary); }
        .chip-item:hover i { color: #fff; }

        /* ===== Image Cover Wrapper ===== */
        .cover-wrap {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .cover-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .cover-wrap:hover img { transform: scale(1.04); }

        /* ===== Divider ===== */
        .divider-custom {
            width: 60px;
            height: 3px;
            background: var(--secondary);
            border-radius: 2px;
            margin: var(--spacing-sm) 0;
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .text-gold { color: var(--secondary); }
        .mb-0 { margin-bottom: 0; }
        .mb-sm { margin-bottom: var(--spacing-sm); }
        .mb-md { margin-bottom: var(--spacing-md); }
        .mb-lg { margin-bottom: var(--spacing-lg); }
        .mt-sm { margin-top: var(--spacing-sm); }
        .mt-md { margin-top: var(--spacing-md); }
        .mt-lg { margin-top: var(--spacing-lg); }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .gap-sm { gap: var(--spacing-sm); }
        .gap-md { gap: var(--spacing-md); }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 520px) {
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            .section-block { padding: var(--spacing-md) 0; }
            .hero-content h1 { font-size: 1.8rem; }
            .hero-content .hero-desc { font-size: 0.95rem; }
            .btn-lg { padding: 0.8rem 1.8rem; font-size: 1rem; }
        }

        @media (min-width: 521px) and (max-width: 768px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
        }

        /* ===== Smooth reveal animation ===== */
        .reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
        .reveal.visible { opacity: 1; transform: translateY(0); }

        /* ===== Bootstrap overrides ===== */
        .btn { border-radius: var(--radius-sm); font-weight: 600; transition: all var(--transition); }
        .btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .card { border: 1px solid var(--border-light); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); transition: all var(--transition); }
        .card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
        .card .card-img-top { border-radius: var(--radius-md) var(--radius-md) 0 0; }
        .form-control { border-radius: var(--radius-sm); border: 1px solid var(--border-medium); padding: 0.6rem 1rem; }
        .form-control:focus { border-color: var(--secondary); box-shadow: 0 0 0 3px rgba(201,168,76,0.15); }

/* roulang page: category1 */
:root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --secondary: #e94560;
            --secondary-light: #ff6b6b;
            --accent: #0f3460;
            --bg-light: #f8f9fa;
            --bg-dark: #0f0f1a;
            --text-dark: #1a1a2e;
            --text-light: #f8f9fa;
            --text-muted: #6c757d;
            --border-color: #e9ecef;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            color: var(--text-dark);
            background: var(--bg-light);
            line-height: 1.7;
            padding-top: var(--header-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-light);
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }

        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 20px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            transition: var(--transition);
        }
        .navbar-brand:hover {
            color: var(--secondary);
            transform: scale(1.02);
        }
        .navbar-brand .brand-icon {
            font-size: 1.6rem;
            color: var(--secondary);
        }

        .nav-tabs-custom {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 4px;
            background: var(--bg-light);
            border-radius: 50px;
            border: 1px solid var(--border-color);
        }
        .nav-tabs-custom .nav-item {
            margin: 0;
        }
        .nav-tabs-custom .nav-link {
            display: block;
            padding: 8px 22px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-muted);
            border-radius: 50px;
            transition: var(--transition);
            white-space: nowrap;
            background: transparent;
            border: none;
        }
        .nav-tabs-custom .nav-link:hover {
            color: var(--primary);
            background: rgba(233, 69, 96, 0.08);
        }
        .nav-tabs-custom .nav-link.active {
            color: #fff;
            background: var(--secondary);
            box-shadow: 0 4px 15px rgba(233, 69, 96, 0.3);
        }
        .nav-tabs-custom .nav-link.active:hover {
            color: #fff;
            background: var(--secondary);
        }

        .nav-cta {
            flex-shrink: 0;
        }
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-secondary-custom {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 15px rgba(233, 69, 96, 0.3);
        }
        .btn-secondary-custom:hover {
            background: #d63850;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(233, 69, 96, 0.4);
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-light-custom {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.3);
        }
        .btn-light-custom:hover {
            background: rgba(255, 255, 255, 0.35);
            color: #fff;
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 8px 12px;
            border-radius: var(--border-radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-light);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .page-banner .breadcrumb {
            background: none;
            padding: 0;
            margin-bottom: 12px;
            font-size: 0.95rem;
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }
        .page-banner .breadcrumb a:hover {
            color: #fff;
        }
        .page-banner .breadcrumb .active {
            color: var(--secondary-light);
        }
        .page-banner .breadcrumb-item+.breadcrumb-item::before {
            color: rgba(255, 255, 255, 0.4);
        }
        .page-banner .banner-desc {
            font-size: 1.15rem;
            opacity: 0.9;
            max-width: 680px;
            line-height: 1.7;
        }
        .page-banner .banner-stats {
            display: flex;
            gap: 40px;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .page-banner .stat-item {
            display: flex;
            flex-direction: column;
        }
        .page-banner .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--secondary-light);
            line-height: 1.2;
        }
        .page-banner .stat-label {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        /* ===== Section通用 ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin-bottom: 20px;
        }

        /* ===== Guide Cards ===== */
        .guide-card {
            background: #fff;
            border-radius: var(--border-radius);
            padding: 32px 28px;
            height: 100%;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .guide-card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            margin-bottom: 20px;
            background: var(--secondary);
        }
        .guide-card .card-icon.icon-purple {
            background: #6c5ce7;
        }
        .guide-card .card-icon.icon-teal {
            background: #00b894;
        }
        .guide-card .card-icon.icon-orange {
            background: #fdcb6e;
            color: #2d3436;
        }
        .guide-card .card-icon.icon-blue {
            background: #0984e3;
        }
        .guide-card .card-icon.icon-pink {
            background: #fd79a8;
        }
        .guide-card .card-icon.icon-green {
            background: #00cec9;
        }
        .guide-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .guide-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .guide-card .card-tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--secondary);
            background: rgba(233, 69, 96, 0.08);
            border-radius: 50px;
            margin-top: auto;
        }
        .guide-card .card-step {
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 3rem;
            font-weight: 900;
            color: rgba(233, 69, 96, 0.06);
            line-height: 1;
            pointer-events: none;
        }

        /* ===== Step Timeline ===== */
        .timeline-section {
            background: var(--bg-light);
        }
        .step-timeline {
            position: relative;
            padding-left: 40px;
            list-style: none;
        }
        .step-timeline::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 8px;
            bottom: 8px;
            width: 3px;
            background: linear-gradient(to bottom, var(--secondary), var(--accent));
            border-radius: 4px;
        }
        .step-item {
            position: relative;
            margin-bottom: 40px;
            padding-left: 20px;
        }
        .step-item:last-child {
            margin-bottom: 0;
        }
        .step-item .step-marker {
            position: absolute;
            left: -40px;
            top: 4px;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--secondary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 800;
            box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.15);
            z-index: 2;
        }
        .step-item .step-content {
            background: #fff;
            border-radius: var(--border-radius);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .step-item .step-content:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .step-item .step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .step-item .step-content p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .step-item .step-content .step-tip {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            color: #fff;
            background: var(--accent);
            border-radius: 50px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: #fff;
        }
        .faq-accordion .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius-sm) !important;
            margin-bottom: 12px;
            background: var(--bg-light);
            overflow: hidden;
        }
        .faq-accordion .accordion-button {
            font-weight: 700;
            font-size: 1rem;
            color: var(--primary);
            background: var(--bg-light);
            padding: 18px 24px;
            box-shadow: none !important;
            border: none;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--secondary);
            background: #fff;
        }
        .faq-accordion .accordion-button::after {
            background-size: 1rem;
            transition: var(--transition);
        }
        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            background: #fff;
            border-top: 1px solid var(--border-color);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta {
            padding: 16px 48px;
            font-size: 1.1rem;
            font-weight: 700;
            border-radius: 50px;
            background: var(--secondary);
            color: #fff;
            border: none;
            box-shadow: 0 8px 30px rgba(233, 69, 96, 0.4);
            transition: var(--transition);
        }
        .cta-section .btn-cta:hover {
            background: #d63850;
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(233, 69, 96, 0.5);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
            font-size: 0.95rem;
        }
        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .site-footer .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            line-height: 1.7;
        }
        .site-footer h5 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: var(--secondary-light);
            padding-left: 4px;
        }
        .site-footer .d-flex a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.3rem;
            transition: var(--transition);
        }
        .site-footer .d-flex a:hover {
            color: var(--secondary-light);
            transform: scale(1.15);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            margin-top: 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .page-banner .banner-stats {
                gap: 24px;
            }
            .page-banner .stat-number {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 768px) {
            .nav-tabs-custom {
                display: none;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 16px;
                right: 16px;
                background: #fff;
                border-radius: var(--border-radius);
                box-shadow: var(--shadow-lg);
                padding: 12px;
                border: 1px solid var(--border-color);
                gap: 4px;
            }
            .nav-tabs-custom.show {
                display: flex;
            }
            .nav-tabs-custom .nav-link {
                padding: 12px 20px;
                border-radius: var(--border-radius-sm);
                width: 100%;
                text-align: left;
            }
            .nav-toggle {
                display: block;
            }
            .nav-cta .btn-custom {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
            .page-banner {
                padding: 60px 0 40px;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner .banner-desc {
                font-size: 1rem;
            }
            .page-banner .banner-stats {
                gap: 16px;
            }
            .page-banner .stat-number {
                font-size: 1.4rem;
            }
            .section-padding {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 28px;
            }
            .guide-card {
                padding: 24px 20px;
            }
            .guide-card .card-step {
                font-size: 2.2rem;
                top: 12px;
                right: 14px;
            }
            .step-timeline {
                padding-left: 32px;
            }
            .step-item .step-marker {
                left: -32px;
                width: 28px;
                height: 28px;
                font-size: 0.7rem;
            }
            .step-item .step-content {
                padding: 18px 20px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section .btn-cta {
                padding: 14px 32px;
                font-size: 1rem;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-desc {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner .banner-desc {
                font-size: 0.92rem;
            }
            .page-banner .banner-stats {
                flex-direction: column;
                gap: 12px;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .guide-card h3 {
                font-size: 1.05rem;
            }
            .guide-card p {
                font-size: 0.9rem;
            }
            .step-item .step-content h4 {
                font-size: 1rem;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .navbar-brand {
                font-size: 1.1rem;
            }
            .navbar-brand .brand-icon {
                font-size: 1.3rem;
            }
        }

        /* ===== 资源图片辅助 ===== */
        .img-cover-fit {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--border-radius-sm);
        }

        /* ===== 卡片额外 ===== */
        .resource-card {
            background: #fff;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .resource-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .resource-card .card-img-wrap {
            height: 200px;
            overflow: hidden;
            background: var(--bg-light);
        }
        .resource-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .resource-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .resource-card .card-body {
            padding: 20px 22px 24px;
        }
        .resource-card .card-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .resource-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .resource-card .card-body .card-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* ===== 特性网格 ===== */
        .feature-icon-box {
            text-align: center;
            padding: 32px 20px;
            background: #fff;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            height: 100%;
        }
        .feature-icon-box:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .feature-icon-box .f-icon {
            width: 64px;
            height: 64px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: #fff;
            margin: 0 auto 16px;
            background: var(--secondary);
        }
        .feature-icon-box .f-icon.f-purple {
            background: #6c5ce7;
        }
        .feature-icon-box .f-icon.f-teal {
            background: #00b894;
        }
        .feature-icon-box .f-icon.f-orange {
            background: #fdcb6e;
            color: #2d3436;
        }
        .feature-icon-box .f-icon.f-blue {
            background: #0984e3;
        }
        .feature-icon-box h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .feature-icon-box p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

/* roulang page: article */
:root {
            --primary: #1a2940;
            --primary-light: #2c3e50;
            --secondary: #d4a040;
            --secondary-light: #e8c56a;
            --secondary-dark: #b8892e;
            --accent: #e74c3c;
            --accent-light: #f1948a;
            --bg-light: #f8f7f4;
            --bg-white: #ffffff;
            --bg-dark: #0f1a2b;
            --text-dark: #1a1a2e;
            --text-body: #3d3d4a;
            --text-muted: #7a7a8a;
            --text-light: #f0ece4;
            --border-light: #e8e4de;
            --border-color: #d6d0c8;
            --shadow-sm: 0 2px 8px rgba(26, 41, 64, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 41, 64, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 41, 64, 0.14);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: all 0.3s ease;
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        a:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container-custom {
                padding: 0 16px;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding: 0 12px;
            }
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .navbar-custom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            gap: 16px;
            flex-wrap: nowrap;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .navbar-brand:hover {
            color: var(--primary);
        }
        .navbar-brand .brand-icon {
            color: var(--secondary);
            font-size: 1.5rem;
        }
        .nav-tabs-custom {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg-light);
            padding: 4px;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-light);
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-tabs-custom::-webkit-scrollbar {
            display: none;
        }
        .nav-tabs-custom .nav-item {
            margin: 0;
        }
        .nav-tabs-custom .nav-link {
            display: block;
            padding: 8px 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-xl);
            transition: var(--transition);
            white-space: nowrap;
            text-decoration: none;
            background: transparent;
            border: none;
        }
        .nav-tabs-custom .nav-link:hover {
            color: var(--primary);
            background: rgba(212, 160, 64, 0.10);
        }
        .nav-tabs-custom .nav-link.active {
            color: var(--primary);
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            font-weight: 600;
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .btn-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-xl);
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }
        .btn-custom:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            text-decoration: none;
        }
        .btn-custom:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary-custom {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            color: var(--bg-white);
        }
        .btn-secondary-custom:hover {
            background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
            color: var(--bg-white);
        }
        .btn-primary-custom {
            background: var(--primary);
            color: var(--bg-white);
        }
        .btn-primary-custom:hover {
            background: var(--primary-light);
            color: var(--bg-white);
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: var(--bg-white);
        }
        .btn-accent-custom {
            background: linear-gradient(135deg, var(--accent), #c0392b);
            color: var(--bg-white);
        }
        .btn-accent-custom:hover {
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            color: var(--bg-white);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: var(--bg-light);
        }
        @media (max-width: 820px) {
            .nav-tabs-custom {
                display: none;
                position: absolute;
                top: 100%;
                left: 12px;
                right: 12px;
                background: var(--bg-white);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow-lg);
                border: 1px solid var(--border-light);
                padding: 12px;
                flex-direction: column;
                gap: 4px;
                z-index: 1050;
                max-height: 60vh;
                overflow-y: auto;
            }
            .nav-tabs-custom.open {
                display: flex;
            }
            .nav-tabs-custom .nav-link {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                width: 100%;
                text-align: left;
            }
            .nav-tabs-custom .nav-link.active {
                background: var(--bg-light);
            }
            .nav-toggle {
                display: block;
            }
            .nav-cta .btn-custom {
                padding: 8px 18px;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 520px) {
            .navbar-brand {
                font-size: 1.1rem;
            }
            .navbar-brand .brand-icon {
                font-size: 1.2rem;
            }
            .nav-cta .btn-custom {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }

        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary) 0%, #0f1a2b 100%);
            min-height: 260px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-banner .container-custom {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .article-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
        }
        .article-breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }
        .article-breadcrumb a:hover {
            color: var(--secondary-light);
        }
        .article-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
        }
        .article-breadcrumb .current {
            color: var(--secondary-light);
            font-weight: 500;
        }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--bg-white);
            line-height: 1.25;
            letter-spacing: -0.5px;
            max-width: 900px;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.9rem;
            align-items: center;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .badge-category {
            display: inline-block;
            padding: 4px 16px;
            background: var(--secondary);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: var(--radius-xl);
            letter-spacing: 0.5px;
        }
        @media (max-width: 768px) {
            .article-banner {
                padding: 60px 0 40px;
                min-height: 200px;
            }
            .article-banner h1 {
                font-size: 1.8rem;
            }
            .article-meta {
                gap: 12px 20px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 520px) {
            .article-banner h1 {
                font-size: 1.5rem;
            }
            .article-banner {
                padding: 44px 0 32px;
            }
        }

        .article-main {
            padding: 48px 0 64px;
        }
        .article-content-wrapper {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 40px 48px;
            border: 1px solid var(--border-light);
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-body);
        }
        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-top: 36px;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: 28px;
            margin-bottom: 12px;
        }
        .article-content p {
            margin-bottom: 18px;
            color: var(--text-body);
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 6px;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 6px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--secondary);
            padding: 16px 24px;
            background: var(--bg-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--text-muted);
        }
        .article-content a {
            color: var(--secondary-dark);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--secondary);
        }
        .article-content .table-responsive {
            margin: 24px 0;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            display: inline-block;
            padding: 6px 18px;
            background: var(--bg-light);
            border-radius: var(--radius-xl);
            font-size: 0.8rem;
            color: var(--text-muted);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--secondary);
            color: var(--bg-white);
            border-color: var(--secondary);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
        }
        .article-share span {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-light);
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 1rem;
            text-decoration: none;
        }
        .article-share a:hover {
            background: var(--secondary);
            color: var(--bg-white);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .article-content-wrapper {
                padding: 24px 20px;
            }
            .article-content {
                font-size: 0.95rem;
            }
            .article-content h2 {
                font-size: 1.3rem;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
        }
        @media (max-width: 520px) {
            .article-content-wrapper {
                padding: 16px 12px;
            }
            .article-content {
                font-size: 0.9rem;
            }
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found .icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-bottom: 24px;
        }

        .article-nav {
            margin-top: 40px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: space-between;
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            color: var(--text-body);
            font-size: 0.9rem;
            font-weight: 500;
            max-width: 48%;
            text-decoration: none;
            flex: 1 1 auto;
        }
        .article-nav a:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            color: var(--primary);
            border-color: var(--secondary);
        }
        .article-nav a .nav-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            font-weight: 400;
            display: block;
        }
        .article-nav a .nav-title {
            display: block;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 200px;
        }
        .article-nav a.next {
            text-align: right;
            flex-direction: row-reverse;
        }
        @media (max-width: 640px) {
            .article-nav {
                flex-direction: column;
            }
            .article-nav a {
                max-width: 100%;
                flex: 1 1 100%;
            }
            .article-nav a .nav-title {
                max-width: 100%;
            }
        }

        .section-related {
            padding: 64px 0 48px;
            background: var(--bg-light);
        }
        .section-related .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 36px;
            letter-spacing: -0.3px;
            text-align: center;
        }
        .section-related .section-title span {
            color: var(--secondary);
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--secondary);
        }
        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card .card-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-title a {
            color: inherit;
            text-decoration: none;
        }
        .related-card .card-title a:hover {
            color: var(--secondary);
        }
        .related-card .card-text {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-date {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        @media (max-width: 768px) {
            .section-related .section-title {
                font-size: 1.4rem;
            }
            .related-card .card-img {
                height: 160px;
            }
        }
        @media (max-width: 520px) {
            .related-card .card-img {
                height: 140px;
            }
            .related-card .card-body {
                padding: 16px;
            }
        }

        .section-cta {
            padding: 72px 0;
            background: linear-gradient(135deg, var(--primary) 0%, #0f1a2b 100%);
            position: relative;
            overflow: hidden;
        }
        .section-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .section-cta .container-custom {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .section-cta h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--bg-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-cta p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .section-cta .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .section-cta .btn-custom {
            padding: 14px 40px;
            font-size: 1.05rem;
        }
        @media (max-width: 768px) {
            .section-cta {
                padding: 48px 0;
            }
            .section-cta h2 {
                font-size: 1.6rem;
            }
            .section-cta p {
                font-size: 0.95rem;
            }
            .section-cta .btn-custom {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        .section-faq {
            padding: 64px 0;
            background: var(--bg-white);
        }
        .section-faq .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 40px;
            text-align: center;
            letter-spacing: -0.3px;
        }
        .section-faq .section-title span {
            color: var(--secondary);
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 20px 0;
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-light);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            padding: 4px 0;
            transition: var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--secondary);
        }
        .faq-question .icon {
            flex-shrink: 0;
            font-size: 1.2rem;
            color: var(--secondary);
            transition: var(--transition);
        }
        .faq-question.open .icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 32px 0 0;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 400px;
            padding-top: 12px;
        }
        @media (max-width: 768px) {
            .section-faq .section-title {
                font-size: 1.4rem;
            }
            .faq-question {
                font-size: 0.95rem;
            }
            .faq-answer {
                font-size: 0.9rem;
            }
        }

        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }
        .site-footer h5 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--bg-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--bg-white);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-footer .footer-desc {
            font-size: 0.9rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }
        .site-footer .footer-links {
            padding: 0;
            margin: 0;
            list-style: none;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
            font-size: 0.9rem;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer .footer-links a:hover {
            color: var(--secondary-light);
            transform: translateX(4px);
        }
        .site-footer .footer-links i {
            width: 16px;
            color: var(--secondary);
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--secondary-light);
        }
        .site-footer .d-flex a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 1.2rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            text-decoration: none;
        }
        .site-footer .d-flex a:hover {
            color: var(--secondary);
            background: rgba(212, 160, 64, 0.15);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .site-footer {
                padding: 40px 0 0;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        .scroll-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--bg-white);
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            z-index: 1040;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .scroll-top:hover {
            background: var(--secondary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        @media (max-width: 520px) {
            .scroll-top {
                bottom: 20px;
                right: 20px;
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

        .text-secondary-custom {
            color: var(--secondary) !important;
        }
        .bg-secondary-custom {
            background-color: var(--secondary) !important;
        }
        .text-primary-custom {
            color: var(--primary) !important;
        }
        .bg-primary-custom {
            background-color: var(--primary) !important;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .gap-4 {
            gap: 24px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .mt-4 {
            margin-top: 24px;
        }
        .mb-3 {
            margin-bottom: 16px;
        }
        .mb-4 {
            margin-bottom: 24px;
        }
        @media (max-width: 576px) {
            .row-cols-2>* {
                flex: 0 0 50%;
                max-width: 50%;
            }
        }