/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1b3d;
            --primary-light: #1a2d6e;
            --primary-dark: #0a1230;
            --accent: #f0b830;
            --accent-light: #f5c84a;
            --accent-dark: #d4a020;
            --bg-body: #ffffff;
            --bg-alt: #f4f6fc;
            --bg-card: #ffffff;
            --bg-dark: #0f1b3d;
            --text-primary: #0f1b3d;
            --text-body: #2d3748;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f4f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 64px rgba(0,0,0,0.16);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --nav-height: 76px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: var(--bg-body);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-primary); font-weight: 700; line-height: 1.3; }
        h1 { font-size: clamp(2rem, 5vw, 3.6rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; }
        p:last-child { margin-bottom: 0; }
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark h2, .section-dark h3, .section-dark .text-muted { color: var(--text-white); }
        .text-center { text-align: center; }
        .text-muted { color: var(--text-muted); }
        .mb-12 { margin-bottom: 12px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-40 { margin-bottom: 40px; }
        .mb-60 { margin-bottom: 60px; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.02em;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 184, 48, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255,255,255,0.4);
        }
        .btn-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-outline-dark {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline-dark:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-lg { padding: 16px 40px; font-size: 1.1rem; border-radius: var(--radius-md); }
        .btn-sm { padding: 8px 20px; font-size: 0.9rem; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 50px;
            background: rgba(240, 184, 48, 0.15);
            color: var(--accent-dark);
        }
        .badge-primary { background: var(--accent); color: var(--primary); }
        .badge-light { background: rgba(255,255,255,0.15); color: var(--text-white); }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .card-body { padding: 20px 24px 24px; }
        .card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
        .card-text { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.82rem; color: var(--text-light); margin-top: 12px; }

        /* ===== Grid ===== */
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-between { display: flex; align-items: center; justify-content: space-between; }
        .gap-12 { gap: 12px; }
        .gap-24 { gap: 24px; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(15, 27, 61, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .site-logo i { color: var(--accent); font-size: 1.5rem; }
        .site-logo span { background: linear-gradient(135deg, #fff 60%, var(--accent-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list { display: flex; align-items: center; gap: 32px; }
        .nav-list a {
            color: rgba(255,255,255,0.7);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .nav-list a:hover { color: var(--text-white); }
        .nav-list a:hover::after { width: 100%; }
        .nav-list a.active { color: var(--text-white); }
        .nav-list a.active::after { width: 100%; }
        .nav-cta .btn { padding: 8px 22px; font-size: 0.9rem; }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
        .nav-toggle span { display: block; width: 26px; height: 2.5px; background: var(--text-white); border-radius: 3px; transition: all var(--transition); }
        .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            padding-top: var(--nav-height);
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,27,61,0.92) 0%, rgba(15,27,61,0.72) 50%, rgba(15,27,61,0.88) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            padding: 60px 0 80px;
        }
        .hero-tag { margin-bottom: 16px; }
        .hero h1 { color: var(--text-white); margin-bottom: 20px; font-weight: 800; }
        .hero h1 span { background: linear-gradient(135deg, var(--accent), #f7d44a); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p { font-size: 1.15rem; color: rgba(255,255,255,0.75); line-height: 1.7; margin-bottom: 36px; max-width: 580px; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
        .hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 36px; border-top: 1px solid rgba(255,255,255,0.1); }
        .hero-stat { text-align: center; }
        .hero-stat .num { font-size: 2rem; font-weight: 800; color: var(--accent); display: block; }
        .hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

        /* ===== Features / Intro ===== */
        .intro-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 20px; }
        .intro-card {
            background: var(--bg-card);
            padding: 36px 28px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .intro-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .intro-card .icon { width: 60px; height: 60px; border-radius: 16px; background: rgba(240,184,48,0.12); display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; font-size: 1.6rem; color: var(--accent-dark); }
        .intro-card h3 { margin-bottom: 10px; }
        .intro-card p { font-size: 0.92rem; color: var(--text-muted); }

        /* ===== Category Cards ===== */
        .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
            background: var(--primary);
            transition: all var(--transition);
        }
        .category-card:hover { transform: scale(1.02); box-shadow: var(--shadow-lg); }
        .category-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.35; transition: opacity var(--transition); }
        .category-card:hover img { opacity: 0.2; }
        .category-card .overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(15,27,61,0.9) 0%, rgba(15,27,61,0.2) 100%); }
        .category-card .content { position: relative; z-index: 2; padding: 32px 28px; width: 100%; }
        .category-card h3 { color: var(--text-white); font-size: 1.5rem; margin-bottom: 6px; }
        .category-card p { color: rgba(255,255,255,0.7); font-size: 0.9rem; margin-bottom: 16px; }
        .category-card .btn { background: var(--accent); color: var(--primary); border: none; }
        .category-card .btn:hover { background: var(--accent-light); }

        /* ===== Latest News / CMS List ===== */
        .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .news-card .card-body { padding: 18px 20px 20px; }
        .news-card .card-title { font-size: 1.05rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card .card-text { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card .card-meta { margin-top: 10px; }
        .news-card .badge { font-size: 0.7rem; padding: 2px 10px; }
        .empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); grid-column: 1 / -1; }
        .empty-state i { font-size: 3rem; margin-bottom: 16px; opacity: 0.3; }
        .empty-state p { font-size: 1.1rem; }

        /* ===== Timeline / Process ===== */
        .timeline { position: relative; padding: 20px 0; max-width: 800px; margin: 0 auto; }
        .timeline::before { content: ''; position: absolute; left: 24px; top: 0; bottom: 0; width: 3px; background: var(--border); border-radius: 3px; }
        .tl-item { display: flex; gap: 32px; margin-bottom: 40px; position: relative; }
        .tl-item:last-child { margin-bottom: 0; }
        .tl-icon { width: 50px; height: 50px; border-radius: 50%; background: var(--accent); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; position: relative; z-index: 2; box-shadow: 0 0 0 4px var(--bg-body); }
        .tl-content { padding-top: 6px; flex: 1; }
        .tl-content h4 { margin-bottom: 6px; }
        .tl-content p { color: var(--text-muted); font-size: 0.92rem; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item { border-bottom: 1px solid var(--border); padding: 0; }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            padding: 20px 0;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            background: none;
            border: none;
            transition: color var(--transition);
        }
        .faq-question:hover { color: var(--accent-dark); }
        .faq-question i { transition: transform var(--transition); font-size: 0.85rem; color: var(--text-light); }
        .faq-question.open i { transform: rotate(180deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 0; }
        .faq-answer.open { max-height: 300px; padding: 0 0 20px; }
        .faq-answer p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::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;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { color: var(--text-white); margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.7); font-size: 1.1rem; max-width: 560px; margin: 0 auto 36px; }
        .cta-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.06); }
        .footer-brand .site-logo { margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; max-width: 320px; line-height: 1.7; }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; margin-bottom: 20px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 0.9rem; color: rgba(255,255,255,0.55); transition: color var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom { padding: 24px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: rgba(255,255,255,0.35); }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--accent); }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a { width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.12); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); transition: all var(--transition); }
        .footer-social a:hover { border-color: var(--accent); color: var(--accent); background: rgba(240,184,48,0.1); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-list { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(15,27,61,0.98); flex-direction: column; padding: 24px 28px; gap: 16px; border-bottom: 1px solid rgba(255,255,255,0.06); }
            .nav-list.open { display: flex; }
            .nav-list a { font-size: 1.05rem; padding: 8px 0; }
            .nav-cta { display: none; }
            .nav-toggle { display: flex; }
            .hero { min-height: 80vh; }
            .hero-content { padding: 40px 0 60px; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat .num { font-size: 1.5rem; }
            .grid-2, .grid-3, .intro-grid, .news-grid { grid-template-columns: 1fr; }
            .category-grid { grid-template-columns: 1fr; }
            .category-card { min-height: 240px; }
            .section { padding: 56px 0; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .intro-card { padding: 28px 20px; }
            .tl-item { gap: 20px; }
            .tl-icon { width: 40px; height: 40px; font-size: 1rem; }
            .timeline::before { left: 19px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 1rem; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .btn-lg { padding: 14px 28px; }
            .grid-4 { grid-template-columns: 1fr; }
        }

        /* ===== Misc Utilities ===== */
        .section-title { margin-bottom: 12px; }
        .section-subtitle { color: var(--text-muted); font-size: 1.05rem; max-width: 600px; margin: 0 auto 40px; }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.6); }
        .divider { width: 48px; height: 3px; background: var(--accent); border-radius: 3px; margin: 0 auto 16px; }
        .gap-row { display: flex; flex-wrap: wrap; gap: 8px; }
        .mt-20 { margin-top: 20px; }
        .mt-40 { margin-top: 40px; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #fae1e3;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --accent-dark: #e76f51;
            --bg-body: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-section: #f1f3f5;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --text-white: #ffffff;
            --border-color: #e8e8f0;
            --border-light: #f0f0f5;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
            --shadow-md: 0 8px 30px rgba(26, 26, 46, 0.08);
            --shadow-lg: 0 20px 60px rgba(26, 26, 46, 0.12);
            --shadow-hover: 0 16px 48px rgba(230, 57, 70, 0.15);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Utility ===== */
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .text-center {
            text-align: center;
        }
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.8;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--primary);
            margin-bottom: 12px;
            background: var(--primary-light);
            padding: 4px 16px;
            border-radius: 100px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .site-logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover span {
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: 100px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-list a.active {
            color: var(--text-white);
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
        }
        .nav-list a.active:hover {
            background: var(--primary-dark);
            color: var(--text-white);
        }
        .nav-cta {
            margin-left: 12px;
        }
        .nav-cta .btn {
            padding: 8px 22px;
            font-size: 0.9rem;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle:hover span {
            background: var(--primary);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.3px;
            justify-content: center;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(230, 57, 70, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(230, 57, 70, 0.2);
        }
        .btn-light {
            background: var(--text-white);
            color: var(--primary);
            border-color: var(--text-white);
        }
        .btn-light:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(255, 255, 255, 0.3);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 18px 44px;
            font-size: 1.1rem;
        }
        .btn i {
            font-size: 0.9em;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, rgba(26, 26, 46, 0.92), rgba(26, 26, 46, 0.7)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            position: relative;
            overflow: hidden;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 3.2rem;
            font-weight: 900;
            color: var(--text-white);
            letter-spacing: -1px;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        .page-banner h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-banner p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .page-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .page-banner .banner-tags span {
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            border-radius: 100px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        /* ===== Category Tabs ===== */
        .category-tabs {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: var(--header-height);
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }
        .category-tabs .container {
            display: flex;
            gap: 4px;
            overflow-x: auto;
            padding: 12px 24px;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .category-tabs .container::-webkit-scrollbar {
            display: none;
        }
        .category-tabs .tab-item {
            flex-shrink: 0;
            padding: 8px 24px;
            border-radius: 100px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            cursor: pointer;
            white-space: nowrap;
        }
        .category-tabs .tab-item:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary-light);
        }
        .category-tabs .tab-item.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.25);
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/10;
            background: var(--bg-section);
        }
        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-image img {
            transform: scale(1.05);
        }
        .card-image .card-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 4px 14px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }
        .card-image .card-date {
            position: absolute;
            bottom: 16px;
            right: 16px;
            padding: 4px 12px;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(6px);
            color: var(--text-white);
            border-radius: 100px;
            font-size: 0.78rem;
        }
        .card-body {
            padding: 24px 26px 26px;
        }
        .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: var(--text-primary);
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .card-meta i {
            margin-right: 4px;
        }
        .card-meta span {
            display: flex;
            align-items: center;
        }
        .card-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ===== Grid Layouts ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== Event Features Section ===== */
        .event-features {
            background: var(--bg-white);
        }
        .feature-card {
            text-align: center;
            padding: 40px 28px;
            border-radius: var(--radius-md);
            background: var(--bg-body);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
            background: var(--bg-white);
        }
        .feature-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 20px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-card:hover .icon {
            background: var(--primary);
            color: var(--text-white);
            transform: scale(1.05) rotate(-4deg);
        }
        .feature-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== Event Flow / Timeline ===== */
        .event-flow {
            background: var(--bg-section);
        }
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: flow-step;
        }
        .flow-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .flow-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .flow-item::before {
            counter-increment: flow-step;
            content: counter(flow-step);
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.25);
        }
        .flow-item .icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin: 8px 0 16px;
        }
        .flow-item h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .flow-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-white);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text-primary);
            background: var(--bg-body);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--text-muted);
            font-size: 1.1rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 28px;
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            background: var(--bg-white);
        }
        .faq-item.active .faq-answer {
            padding: 20px 28px 24px;
            max-height: 400px;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: linear-gradient(135deg, rgba(26, 26, 46, 0.92), rgba(26, 26, 46, 0.7)), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            padding: 100px 0;
            text-align: center;
            position: relative;
        }
        .cta-section h2 {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer .site-logo {
            color: var(--text-white);
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .site-footer .site-logo span {
            background: linear-gradient(135deg, #f8a4a8, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-footer .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 12px;
        }
        .site-footer h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer ul li a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }
        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-3px);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-banner h1 {
                font-size: 2.6rem;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 32px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
                gap: 6px;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 20px;
                font-size: 1.05rem;
                border-radius: var(--radius-sm);
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }
            .page-banner {
                padding: 120px 0 60px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .section-padding {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .flow-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .category-tabs .container {
                padding: 10px 16px;
            }
            .category-tabs .tab-item {
                padding: 6px 16px;
                font-size: 0.82rem;
            }
            .card-body {
                padding: 18px 20px 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .page-banner .banner-tags span {
                font-size: 0.75rem;
                padding: 4px 12px;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
            .feature-card {
                padding: 28px 20px;
            }
            .flow-item {
                padding: 24px 16px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 14px 18px 18px;
            }
            .cta-section {
                padding: 60px 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .cta-section .btn-group .btn {
                width: 100%;
                max-width: 280px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

        /* ===== Section Divider ===== */
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0 auto 20px;
        }
        .section-divider.left {
            margin: 0 0 20px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1724;
            --primary-light: #1a2a3a;
            --primary-lighter: #243447;
            --secondary: #c9973b;
            --secondary-light: #e0b459;
            --secondary-dark: #a87a2a;
            --accent: #e4572e;
            --accent-light: #f07a4e;
            --bg: #f8f6f2;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f1724;
            --text: #1a1a2e;
            --text-light: #6b7280;
            --text-lighter: #9ca3af;
            --text-white: #f9fafb;
            --border: #e5e7eb;
            --border-light: #f0f0f0;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 12px 36px rgba(0, 0, 0, 0.12);
            --transition: 0.35s ease;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font);
            font-size: 1rem;
            outline: none;
            border: none;
            transition: var(--transition);
        }
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .site-logo i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .site-logo span {
            background: linear-gradient(135deg, var(--primary) 40%, var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover span {
            -webkit-text-fill-color: var(--secondary);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-list a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            position: relative;
            padding: 4px 0;
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-list a:hover {
            color: var(--primary);
        }
        .nav-list a:hover::after {
            width: 100%;
        }
        .nav-list a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-list a.active::after {
            width: 100%;
        }

        .nav-cta {
            margin-left: 8px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary);
            border-color: var(--secondary);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(201, 151, 59, 0.35);
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-white);
            border-color: var(--text-white);
        }
        .btn-secondary:hover {
            background: var(--text-white);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(228, 87, 46, 0.35);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 1.05rem;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--secondary);
            color: var(--secondary);
        }
        .btn-outline:hover {
            background: var(--secondary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            margin-top: var(--header-height);
            padding: 80px 0 60px;
            position: relative;
            background: var(--primary) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 36, 0.88) 0%, rgba(15, 23, 36, 0.60) 100%);
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            color: var(--text-white);
            width: 100%;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-lighter);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a {
            color: var(--text-lighter);
        }
        .article-hero .breadcrumb a:hover {
            color: var(--secondary);
        }
        .article-hero .breadcrumb .sep {
            color: var(--text-lighter);
        }
        .article-hero .breadcrumb .current {
            color: var(--secondary);
        }
        .article-hero .hero-category {
            display: inline-block;
            padding: 4px 16px;
            background: var(--secondary);
            color: var(--primary);
            font-size: 0.80rem;
            font-weight: 700;
            border-radius: 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: 2.6rem;
            color: var(--text-white);
            max-width: 860px;
            line-height: 1.25;
            margin-bottom: 16px;
            font-weight: 800;
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            gap: 24px;
            font-size: 0.90rem;
            color: var(--text-lighter);
            flex-wrap: wrap;
        }
        .article-hero .meta i {
            margin-right: 6px;
            color: var(--secondary);
        }
        .article-hero .meta span {
            display: inline-flex;
            align-items: center;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-main .container {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }

        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 48px 52px;
            box-shadow: var(--shadow);
        }
        .article-body .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body .article-content p {
            margin-bottom: 1.4em;
        }
        .article-body .article-content h2,
        .article-body .article-content h3 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            color: var(--primary);
        }
        .article-body .article-content h2 {
            font-size: 1.6rem;
        }
        .article-body .article-content h3 {
            font-size: 1.25rem;
        }
        .article-body .article-content ul,
        .article-body .article-content ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }
        .article-body .article-content ul li {
            list-style: disc;
            margin-bottom: 0.3em;
        }
        .article-body .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.3em;
        }
        .article-body .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.5em 0;
            box-shadow: var(--shadow);
        }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--secondary);
            padding: 12px 20px;
            margin: 1.5em 0;
            background: var(--bg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body .article-content a {
            color: var(--accent);
            border-bottom: 1px solid transparent;
        }
        .article-body .article-content a:hover {
            border-bottom-color: var(--accent);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
        }
        .article-tags .tag {
            display: inline-block;
            padding: 6px 18px;
            background: var(--bg);
            border-radius: 20px;
            font-size: 0.80rem;
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--secondary);
            color: var(--primary);
            border-color: var(--secondary);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 28px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }
        .article-share span {
            font-size: 0.90rem;
            color: var(--text-light);
            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);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: var(--transition);
            font-size: 1rem;
        }
        .article-share a:hover {
            background: var(--secondary);
            color: var(--primary);
            border-color: var(--secondary);
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(201, 151, 59, 0.25);
        }

        .article-nav-links {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
        }
        .article-nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.90rem;
            color: var(--text-light);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-nav-links a:hover {
            color: var(--primary);
            background: var(--bg-white);
            border-color: var(--secondary);
            box-shadow: var(--shadow);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 36px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--secondary);
            display: inline-block;
            color: var(--primary);
        }
        .sidebar-card ul li {
            margin-bottom: 12px;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.90rem;
            color: var(--text-light);
            padding: 6px 0;
            transition: var(--transition);
        }
        .sidebar-card ul li a i {
            color: var(--secondary);
            font-size: 0.75rem;
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
            padding-left: 6px;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-lighter));
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            color: var(--text-white);
        }
        .sidebar-cta h4 {
            font-size: 1.2rem;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .sidebar-cta p {
            font-size: 0.90rem;
            color: var(--text-lighter);
            margin-bottom: 20px;
        }
        .sidebar-cta .btn {
            width: 100%;
        }

        /* ===== Related Articles ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg);
        }
        .related-section .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .related-section .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .related-section .section-header p {
            color: var(--text-light);
            font-size: 1rem;
            max-width: 520px;
            margin: 0 auto;
        }

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

        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body .card-cat {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .related-card .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.80rem;
            color: var(--text-lighter);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }
        .related-card .card-body .card-meta a {
            color: var(--secondary);
            font-weight: 600;
        }
        .related-card .card-body .card-meta a:hover {
            color: var(--accent);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--primary) url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 36, 0.88) 0%, rgba(15, 23, 36, 0.65) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
            color: var(--text-white);
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-lighter);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 70px 0 80px;
            background: var(--bg-white);
        }
        .faq-section .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .faq-section .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .faq-section .section-header p {
            color: var(--text-light);
            font-size: 1rem;
            max-width: 500px;
            margin: 0 auto;
        }

        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.80rem;
            color: var(--secondary);
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.93rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .faq-item:hover {
            border-color: var(--secondary);
            box-shadow: var(--shadow);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: var(--text-lighter);
            padding: 60px 0 30px;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer .footer-brand .site-logo {
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .site-logo span {
            -webkit-text-fill-color: var(--text-white);
        }
        .site-footer .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: var(--text-lighter);
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 10px;
        }
        .site-footer .footer-col ul li a {
            font-size: 0.88rem;
            color: var(--text-lighter);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .site-footer .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 16px;
        }
        .site-footer .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-lighter);
            font-size: 1rem;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary);
            border-color: var(--secondary);
            transform: translateY(-3px);
        }
        .site-footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            font-size: 0.82rem;
            color: var(--text-lighter);
            flex-wrap: wrap;
            gap: 12px;
        }
        .site-footer .footer-bottom a {
            color: var(--secondary);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--secondary-light);
        }

        .mt-20 {
            margin-top: 20px;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i {
            font-size: 3rem;
            color: var(--secondary);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 24px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-main .container {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 24px 32px 32px;
                gap: 18px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.10);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border);
                align-items: stretch;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list a {
                font-size: 1.05rem;
                padding: 10px 0;
            }
            .nav-list .nav-cta {
                margin-left: 0;
                margin-top: 8px;
            }
            .nav-list .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }

            .article-hero {
                padding: 60px 0 40px;
                min-height: 240px;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-hero .meta {
                gap: 14px;
                font-size: 0.82rem;
            }

            .article-body {
                padding: 28px 20px;
            }
            .article-body .article-content {
                font-size: 0.98rem;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .cta-section .btn-group .btn {
                width: 100%;
                max-width: 300px;
            }

            .faq-section .section-header h2 {
                font-size: 1.6rem;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .article-nav-links {
                flex-direction: column;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-hero .hero-category {
                font-size: 0.70rem;
            }
            .article-body {
                padding: 20px 14px;
            }
            .article-body .article-content {
                font-size: 0.92rem;
            }
            .related-card .card-img {
                height: 160px;
            }
            .sidebar-card {
                padding: 20px 16px;
            }
            .site-logo {
                font-size: 1.1rem;
            }
            .site-logo i {
                font-size: 1.3rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }