/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1729;
            --primary-light: #1a2744;
            --primary-dark: #080e1a;
            --accent: #d4a84b;
            --accent-light: #e8c06a;
            --accent-dark: #b8923a;
            --blue-accent: #2563eb;
            --blue-light: #3b82f6;
            --bg: #ffffff;
            --bg-alt: #f1f5f9;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-secondary: #475569;
            --text-weak: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(15, 23, 41, 0.08);
            --shadow-hover: 0 12px 40px rgba(15, 23, 41, 0.14);
            --shadow-card: 0 2px 12px rgba(15, 23, 41, 0.06);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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); font-size: 16px; line-height: 1.7; color: var(--text); background: var(--bg); }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--blue-accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--blue-light); }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-title { font-size: 2.2rem; text-align: center; margin-bottom: 12px; letter-spacing: -0.02em; }
        .section-sub { font-size: 1.1rem; color: var(--text-secondary); text-align: center; max-width: 680px; margin: 0 auto 48px; }
        .text-accent { color: var(--accent); }
        .text-center { text-align: center; }

        /* ===== Buttons ===== */
        .btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: var(--radius-sm); font-weight: 600; font-size: 1rem; border: none; cursor: pointer; transition: all var(--transition); text-decoration: none; }
        .btn-primary { background: var(--accent); color: var(--primary-dark); }
        .btn-primary:hover { background: var(--accent-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212, 168, 75, 0.35); }
        .btn-secondary { background: transparent; color: var(--bg); border: 2px solid rgba(255,255,255,0.3); }
        .btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); color: var(--bg); transform: translateY(-2px); }
        .btn-outline { background: transparent; color: var(--blue-accent); border: 2px solid var(--blue-accent); }
        .btn-outline:hover { background: var(--blue-accent); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25); }
        .btn-lg { padding: 18px 40px; font-size: 1.1rem; border-radius: var(--radius); }
        .btn-sm { padding: 8px 18px; font-size: 0.875rem; border-radius: 6px; }
        .btn i { font-size: 0.9em; }

        /* ===== Header & Nav ===== */
        .site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; height: var(--nav-height); background: rgba(15, 23, 41, 0.92); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); 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%; }
        .logo { font-size: 1.5rem; font-weight: 800; color: #fff; letter-spacing: -0.03em; display: flex; align-items: center; gap: 10px; text-decoration: none; }
        .logo i { color: var(--accent); font-size: 1.3em; }
        .logo:hover { color: var(--accent); }
        .nav-list { display: flex; align-items: center; gap: 4px; }
        .nav-list a { display: flex; align-items: center; gap: 6px; padding: 10px 20px; border-radius: var(--radius-sm); font-weight: 500; font-size: 0.95rem; color: rgba(255,255,255,0.75); text-decoration: none; transition: all var(--transition); }
        .nav-list a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav-list a.active { color: #fff; background: rgba(212, 168, 75, 0.18); }
        .nav-list a.active i { color: var(--accent); }
        .nav-cta { margin-left: 16px; }
        .nav-cta .btn { padding: 10px 24px; font-size: 0.9rem; }
        .nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; padding: 8px; }

        /* ===== Hero ===== */
        .hero { position: relative; min-height: 88vh; 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: 0.35; transform: scale(1.05); }
        .hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,23,41,0.88) 0%, rgba(15,23,41,0.70) 50%, rgba(15,23,41,0.88) 100%); }
        .hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; margin: 0 auto; padding: 60px 24px; }
        .hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(212,168,75,0.18); border: 1px solid rgba(212,168,75,0.25); color: var(--accent); padding: 6px 18px; border-radius: 100px; font-size: 0.85rem; font-weight: 600; margin-bottom: 24px; backdrop-filter: blur(8px); }
        .hero h1 { font-size: 3.6rem; font-weight: 800; color: #fff; letter-spacing: -0.03em; line-height: 1.15; margin-bottom: 20px; }
        .hero h1 span { color: var(--accent); }
        .hero p { font-size: 1.2rem; color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 36px; line-height: 1.7; }
        .hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .hero-search { max-width: 520px; margin: 32px auto 0; display: flex; gap: 0; border-radius: var(--radius); overflow: hidden; box-shadow: 0 8px 32px rgba(0,0,0,0.3); }
        .hero-search input { flex: 1; padding: 16px 20px; border: none; background: rgba(255,255,255,0.12); backdrop-filter: blur(12px); color: #fff; font-size: 1rem; outline: none; }
        .hero-search input::placeholder { color: rgba(255,255,255,0.45); }
        .hero-search button { padding: 16px 28px; background: var(--accent); color: var(--primary-dark); border: none; font-weight: 700; font-size: 1rem; cursor: pointer; transition: background var(--transition); }
        .hero-search button:hover { background: var(--accent-light); }

        /* ===== Stats Strip ===== */
        .stats-strip { background: var(--primary); border-bottom: 1px solid rgba(255,255,255,0.06); }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; padding: 32px 0; }
        .stat-item { text-align: center; border-right: 1px solid rgba(255,255,255,0.06); padding: 8px 16px; }
        .stat-item:last-child { border-right: none; }
        .stat-number { font-size: 2.2rem; font-weight: 800; color: #fff; letter-spacing: -0.02em; }
        .stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }
        .stat-number .accent { color: var(--accent); }

        /* ===== Intro / About ===== */
        .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .intro-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); position: relative; }
        .intro-image img { width: 100%; height: 400px; object-fit: cover; transition: transform 0.6s ease; }
        .intro-image:hover img { transform: scale(1.03); }
        .intro-text h2 { font-size: 2rem; margin-bottom: 16px; }
        .intro-text p { color: var(--text-secondary); margin-bottom: 16px; font-size: 1.05rem; }
        .intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }
        .intro-feat { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; color: var(--text); }
        .intro-feat i { color: var(--accent); font-size: 1.1rem; width: 24px; text-align: center; }

        /* ===== Category Cards ===== */
        .cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .cat-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; background: var(--bg-card); box-shadow: var(--shadow-card); transition: all var(--transition); border: 1px solid var(--border); }
        .cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .cat-card-image { height: 200px; overflow: hidden; position: relative; }
        .cat-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
        .cat-card:hover .cat-card-image img { transform: scale(1.05); }
        .cat-card-body { padding: 24px 28px 28px; }
        .cat-card-body h3 { font-size: 1.3rem; margin-bottom: 8px; }
        .cat-card-body p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 16px; }
        .cat-card-tag { display: inline-flex; align-items: center; gap: 4px; background: var(--bg-alt); padding: 4px 14px; border-radius: 100px; font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); }

        /* ===== News / CMS List ===== */
        .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .news-card { background: var(--bg-card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid var(--border); transition: all var(--transition); }
        .news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .news-card-img { height: 180px; overflow: hidden; position: relative; }
        .news-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .news-card:hover .news-card-img img { transform: scale(1.04); }
        .news-card-img .tag { position: absolute; top: 12px; left: 12px; background: var(--accent); color: var(--primary-dark); padding: 4px 14px; border-radius: 100px; font-size: 0.75rem; font-weight: 700; }
        .news-card-body { padding: 20px 24px 24px; }
        .news-card-body h3 { font-size: 1.1rem; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card-body h3 a { color: var(--primary); text-decoration: none; }
        .news-card-body h3 a:hover { color: var(--blue-accent); }
        .news-card-body p { color: var(--text-secondary); font-size: 0.9rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 14px; }
        .news-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: var(--text-weak); }
        .news-meta i { margin-right: 4px; }
        .empty-news { grid-column: 1 / -1; text-align: center; padding: 60px 24px; color: var(--text-weak); font-size: 1.05rem; background: var(--bg-alt); border-radius: var(--radius); }

        /* ===== Flow / Steps ===== */
        .flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: step; }
        .flow-step { text-align: center; padding: 36px 20px; background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); position: relative; transition: all var(--transition); }
        .flow-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .flow-step::before { counter-increment: step; content: "0" counter(step); position: absolute; top: 16px; right: 20px; font-size: 2.4rem; font-weight: 800; color: rgba(15,23,41,0.05); line-height: 1; }
        .flow-icon { width: 64px; height: 64px; margin: 0 auto 16px; background: var(--bg-alt); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; color: var(--accent); transition: all var(--transition); }
        .flow-step:hover .flow-icon { background: var(--accent); color: var(--primary-dark); }
        .flow-step h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .flow-step p { font-size: 0.9rem; color: var(--text-secondary); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: all var(--transition); }
        .faq-item:hover { border-color: var(--accent); }
        .faq-question { padding: 20px 28px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600; font-size: 1rem; color: var(--text); background: none; border: none; width: 100%; text-align: left; gap: 16px; }
        .faq-question i { color: var(--accent); transition: transform var(--transition); font-size: 0.9rem; flex-shrink: 0; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer { padding: 0 28px 20px; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7; display: none; }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-block { background: var(--primary); border-radius: var(--radius-lg); padding: 64px 48px; text-align: center; position: relative; overflow: hidden; }
        .cta-block::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.1; }
        .cta-block h2 { color: #fff; font-size: 2.2rem; margin-bottom: 12px; position: relative; }
        .cta-block p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 32px; font-size: 1.05rem; position: relative; }
        .cta-block .btn { position: relative; }

        /* ===== Footer ===== */
        .site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.6); padding: 48px 0 32px; border-top: 1px solid rgba(255,255,255,0.05); }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .logo { margin-bottom: 12px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col a { display: block; color: rgba(255,255,255,0.5); font-size: 0.9rem; padding: 4px 0; text-decoration: none; transition: color var(--transition); }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; 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(255,255,255,0.35); text-decoration: none; }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Back to Top ===== */
        .back-top { position: fixed; bottom: 32px; right: 32px; width: 48px; height: 48px; background: var(--accent); color: var(--primary-dark); border: none; border-radius: 50%; font-size: 1.2rem; cursor: pointer; box-shadow: 0 4px 16px rgba(212,168,75,0.3); transition: all var(--transition); opacity: 0; visibility: hidden; z-index: 999; }
        .back-top.show { opacity: 1; visibility: visible; }
        .back-top:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(212,168,75,0.4); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .intro-grid { gap: 40px; }
            .flow-grid { 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(15,23,41,0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 16px 24px 24px; border-bottom: 1px solid rgba(255,255,255,0.06); }
            .nav-list.open { display: flex; }
            .nav-list a { width: 100%; padding: 14px 20px; }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: block; }
            .hero h1 { font-size: 2.4rem; }
            .hero p { font-size: 1rem; }
            .section-title { font-size: 1.8rem; }
            .section-sub { font-size: 1rem; }
            .intro-grid { grid-template-columns: 1fr; gap: 32px; }
            .intro-image img { height: 280px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.06); padding: 12px; }
            .stat-item:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.06); }
            .cat-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .flow-grid { grid-template-columns: 1fr; }
            .cta-block { padding: 40px 24px; }
            .cta-block h2 { font-size: 1.6rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section { padding: 56px 0; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 1.8rem; }
            .hero-search { flex-direction: column; border-radius: var(--radius-sm); }
            .hero-search input { padding: 14px 16px; }
            .hero-search button { padding: 14px 16px; }
            .container { padding: 0 16px; }
            .intro-features { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .stat-number { font-size: 1.6rem; }
        }

        /* ===== Accessibility ===== */
        :focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2c5a8c;
            --primary-dark: #0f2440;
            --secondary: #e8a838;
            --secondary-light: #f0c060;
            --secondary-dark: #c88a20;
            --accent: #3b82f6;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2e;
            --bg-footer: #0b1424;
            --text-primary: #1a1a2e;
            --text-secondary: #4a5568;
            --text-muted: #8899aa;
            --text-light: #f0f4f8;
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --radius-sm: 8px;
            --radius-md: 14px;
            --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(0,0,0,0.10);
            --shadow-hover: 0 16px 48px rgba(0,0,0,0.14);
            --transition: 0.25s ease;
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== 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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            padding-top: var(--header-h);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: 2rem; }
        h2 { font-size: 1.65rem; }
        h3 { font-size: 1.3rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            h1 { font-size: 1.6rem; }
            h2 { font-size: 1.35rem; }
            h3 { font-size: 1.15rem; }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 600;
            line-height: 1.4;
            transition: var(--transition);
            border: 2px solid transparent;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--secondary);
            color: #1a1a2e;
            border-color: var(--secondary);
        }
        .btn-primary:hover { background: var(--secondary-light); border-color: var(--secondary-light); color: #1a1a2e; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,168,56,0.35); }
        .btn-outline {
            background: transparent;
            color: var(--text-light);
            border-color: rgba(255,255,255,0.4);
        }
        .btn-outline:hover { background: rgba(255,255,255,0.12); border-color: var(--text-light); color: var(--text-light); transform: translateY(-2px); }
        .btn-sm { padding: 6px 16px; font-size: 0.85rem; border-radius: 6px; }
        .btn-lg { padding: 14px 36px; font-size: 1.05rem; border-radius: var(--radius-md); }
        .btn:focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            background: rgba(15, 26, 46, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.20);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-light);
            text-decoration: none;
            letter-spacing: -0.3px;
        }
        .logo i { color: var(--secondary); font-size: 1.4rem; }
        .logo:hover { color: var(--secondary); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255,255,255,0.75);
            text-decoration: none;
            transition: var(--transition);
        }
        .nav-list a:hover { background: rgba(255,255,255,0.08); color: var(--text-light); }
        .nav-list a.active { background: rgba(232,168,56,0.15); color: var(--secondary); }
        .nav-cta { margin-left: 12px; }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-light);
            padding: 8px;
            border-radius: var(--radius-sm);
        }
        .nav-toggle:hover { background: rgba(255,255,255,0.08); }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(11, 20, 36, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 20px 24px;
                gap: 4px;
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 1px solid rgba(255,255,255,0.06);
                box-shadow: 0 20px 40px rgba(0,0,0,0.3);
            }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-list a { width: 100%; padding: 12px 16px; font-size: 1rem; }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
        }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 60px 0 50px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
            margin-bottom: 18px;
        }
        .article-banner .breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-banner .breadcrumb a:hover { color: var(--secondary); }
        .article-banner .breadcrumb i { font-size: 0.75rem; }
        .article-banner h1 {
            color: var(--text-light);
            font-size: 2.2rem;
            max-width: 800px;
            margin-bottom: 14px;
            letter-spacing: -0.4px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            align-items: center;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .article-meta .category-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: var(--secondary);
            color: #1a1a2e;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .article-meta i { margin-right: 5px; }
        @media (max-width: 768px) {
            .article-banner { padding: 40px 0 32px; }
            .article-banner h1 { font-size: 1.5rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 50px 0 60px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .article-main {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 40px 44px;
            border: 1px solid var(--border);
        }
        .article-main .content-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-main .content-body h2,
        .article-main .content-body h3 {
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            color: var(--text-primary);
        }
        .article-main .content-body p {
            margin-bottom: 1.2rem;
        }
        .article-main .content-body ul,
        .article-main .content-body ol {
            margin-bottom: 1.2rem;
            padding-left: 1.6rem;
        }
        .article-main .content-body li {
            margin-bottom: 0.5rem;
            list-style: disc;
        }
        .article-main .content-body a { color: var(--accent); text-decoration: underline; }
        .article-main .content-body a:hover { color: var(--secondary); }
        .article-main .content-body blockquote {
            border-left: 4px solid var(--secondary);
            padding: 12px 20px;
            margin: 1.5rem 0;
            background: rgba(232,168,56,0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-main .content-body img {
            border-radius: var(--radius-sm);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }
        .article-not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-not-found i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; }
        .article-not-found h2 { margin-bottom: 12px; }
        .article-not-found p { margin-bottom: 24px; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px 22px;
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 1.05rem;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--secondary); }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.92rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { color: var(--primary); padding-left: 4px; }
        .sidebar-list a i { color: var(--primary-light); font-size: 0.8rem; margin-top: 4px; }
        .sidebar-list .date { font-size: 0.78rem; color: var(--text-muted); display: block; margin-top: 2px; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: var(--text-light);
            border: none;
        }
        .sidebar-cta h3 { color: var(--text-light); border-bottom-color: var(--secondary); }
        .sidebar-cta h3 i { color: var(--secondary); }
        .sidebar-cta p { color: rgba(255,255,255,0.75); font-size: 0.9rem; margin-bottom: 18px; }
        .sidebar-cta .btn { width: 100%; justify-content: center; }
        @media (max-width: 992px) {
            .article-layout { grid-template-columns: 1fr; gap: 30px; }
            .article-main { padding: 28px 24px; }
        }
        @media (max-width: 768px) {
            .article-main { padding: 20px 16px; }
            .article-main .content-body { font-size: 0.98rem; }
            .sidebar-card { padding: 18px 16px; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 0;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo { font-size: 1.3rem; margin-bottom: 14px; display: inline-flex; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); max-width: 320px; line-height: 1.7; }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255,255,255,0.55);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 22px 0;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--secondary); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-brand { grid-column: 1 / -1; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 20px; }
        }

        /* ===== Utilities ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 12px; }

        /* ===== Article Navigation ===== */
        .article-nav {
            display: flex;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.92rem;
            color: var(--primary-light);
            font-weight: 500;
            max-width: 45%;
        }
        .article-nav a:hover { color: var(--secondary); }
        .article-nav .next { text-align: right; flex-direction: row-reverse; }
        @media (max-width: 520px) {
            .article-nav { flex-direction: column; gap: 16px; }
            .article-nav a { max-width: 100%; }
            .article-nav .next { text-align: left; flex-direction: row; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --secondary: #e8a838;
            --secondary-light: #f0c060;
            --secondary-dark: #c88a20;
            --accent: #3a8fb5;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-section-alt: #eef2f7;
            --bg-dark: #0f1a2e;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-muted: #7a8a9a;
            --text-light: #f0f4f8;
            --text-white: #ffffff;
            --border: #dce2ea;
            --border-light: #e8edf3;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 58, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 58, 0.08);
            --shadow-lg: 0 16px 48px rgba(26, 42, 58, 0.10);
            --shadow-hover: 0 12px 36px rgba(26, 42, 58, 0.14);
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 68px;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
        }

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

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

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

        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 2px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        button:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--secondary);
            font-size: 1.2em;
        }

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

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-list::-webkit-scrollbar {
            display: none;
        }

        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all var(--transition);
        }

        .nav-list a i {
            font-size: 0.85em;
            color: var(--text-muted);
            transition: color var(--transition);
        }

        .nav-list a:hover {
            background: var(--bg-section-alt);
            color: var(--primary);
        }

        .nav-list a:hover i {
            color: var(--primary-light);
        }

        .nav-list a.active {
            background: var(--primary);
            color: var(--text-white);
        }

        .nav-list a.active i {
            color: var(--secondary-light);
        }

        .nav-cta {
            margin-left: 8px;
            flex-shrink: 0;
        }

        .nav-cta .btn {
            padding: 8px 20px;
            font-size: 0.88rem;
        }

        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--primary);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--bg-section-alt);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }

            .nav-list {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                flex-direction: column;
                padding: 12px 16px 20px;
                gap: 4px;
                overflow-x: visible;
                z-index: 999;
            }

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

            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }

            .nav-cta {
                margin-left: 0;
                width: 100%;
                margin-top: 8px;
            }

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

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn:active {
            transform: translateY(0px);
            box-shadow: var(--shadow-sm);
        }

        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: var(--text-white);
        }

        .btn-secondary {
            background: var(--secondary);
            color: var(--text-primary);
            border-color: var(--secondary);
        }

        .btn-secondary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            color: var(--text-primary);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-white);
        }

        .btn-white {
            background: var(--bg-white);
            color: var(--primary);
            border-color: var(--bg-white);
        }

        .btn-white:hover {
            background: var(--bg-section-alt);
            border-color: var(--bg-section-alt);
            color: var(--primary-dark);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }

        /* ===== Section Shared ===== */
        section {
            padding: 80px 0;
        }

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

        .section-title h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .section-title p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
        }

        .section-title .badge {
            display: inline-block;
            background: var(--secondary);
            color: var(--text-primary);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

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

            .section-title {
                margin-bottom: 32px;
            }

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

            .section-title p {
                font-size: 0.95rem;
            }
        }

        /* ===== Banner / Hero ===== */
        .page-banner {
            position: relative;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
            padding: 100px 0 80px;
            text-align: center;
            color: var(--text-white);
            isolation: isolate;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 36, 64, 0.88) 0%, rgba(26, 58, 92, 0.76) 100%);
            z-index: 0;
        }

        .page-banner .container {
            position: relative;
            z-index: 1;
        }

        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }

        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }

        .page-banner .breadcrumb a:hover {
            color: var(--secondary-light);
        }

        .page-banner .breadcrumb span {
            color: var(--secondary-light);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 72px 0 56px;
            }

            .page-banner h1 {
                font-size: 1.9rem;
            }

            .page-banner p {
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.5rem;
            }

            .page-banner p {
                font-size: 0.92rem;
            }
        }

        /* ===== Intro / Overview ===== */
        .intro-section {
            background: var(--bg-white);
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .intro-content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .intro-content p {
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.8;
        }

        .intro-content ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .intro-content ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-secondary);
        }

        .intro-content ul li i {
            color: var(--secondary);
            font-size: 1rem;
            margin-top: 4px;
            flex-shrink: 0;
        }

        .intro-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 280px;
        }

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

            .intro-content h3 {
                font-size: 1.3rem;
            }
        }

        /* ===== Login Methods Cards ===== */
        .methods-section {
            background: var(--bg-section-alt);
        }

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

        .method-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            text-align: center;
            transition: all var(--transition);
        }

        .method-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border);
        }

        .method-card .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--bg-section-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.8rem;
            color: var(--primary);
            transition: all var(--transition);
        }

        .method-card:hover .icon-wrap {
            background: var(--primary);
            color: var(--text-white);
        }

        .method-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .method-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .method-card .tag {
            display: inline-block;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            font-size: 0.75rem;
            font-weight: 500;
            padding: 3px 12px;
            border-radius: 50px;
            transition: background var(--transition);
        }

        .method-card:hover .tag {
            background: var(--primary);
            color: var(--text-white);
        }

        @media (max-width: 1024px) {
            .methods-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

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

            .method-card {
                padding: 24px 18px;
            }
        }

        /* ===== Steps / Process ===== */
        .steps-section {
            background: var(--bg-white);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }

        .step-item {
            text-align: center;
            position: relative;
            padding: 0 12px;
        }

        .step-item::after {
            content: '';
            position: absolute;
            top: 32px;
            right: -16px;
            width: 32px;
            height: 2px;
            background: var(--border);
        }

        .step-item:last-child::after {
            display: none;
        }

        .step-number {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            font-size: 1.5rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 4px 16px rgba(26, 58, 92, 0.2);
            transition: all var(--transition);
        }

        .step-item:hover .step-number {
            background: var(--secondary);
            color: var(--text-primary);
            transform: scale(1.05);
        }

        .step-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .step-item::after {
                display: none;
            }
        }

        /* ===== Security Tips ===== */
        .security-section {
            background: var(--bg-section-alt);
        }

        .security-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .security-card {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .security-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }

        .security-card .icon-wrap {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(26, 58, 92, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
        }

        .security-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .security-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

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

            .security-card {
                padding: 20px 16px;
            }
        }

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

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-section-alt);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--border);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: rgba(26, 58, 92, 0.04);
        }

        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }

            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            isolation: isolate;
            padding: 80px 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 36, 64, 0.9) 0%, rgba(26, 58, 92, 0.82) 100%);
            z-index: 0;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 540px;
            margin: 0 auto 28px;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

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

            .cta-section h2 {
                font-size: 1.4rem;
            }

            .cta-section p {
                font-size: 0.95rem;
            }

            .cta-buttons .btn {
                width: 100%;
                max-width: 300px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 28px;
        }

        .footer-brand .logo {
            color: var(--text-white);
            font-size: 1.3rem;
            margin-bottom: 12px;
            display: inline-flex;
        }

        .footer-brand .logo i {
            color: var(--secondary);
        }

        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            padding: 4px 0;
            transition: all var(--transition);
        }

        .footer-col a:hover {
            color: var(--secondary-light);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }

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

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }

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

        .mt-24 {
            margin-top: 24px;
        }

        .mt-32 {
            margin-top: 32px;
        }

        .gap-8 {
            gap: 8px;
        }

        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Accessibility ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
            }
        }

        /* ===== Skip Link ===== */
        .skip-link {
            position: absolute;
            top: -100%;
            left: 16px;
            background: var(--primary);
            color: var(--text-white);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            z-index: 9999;
            font-weight: 600;
        }

        .skip-link:focus {
            top: 12px;
        }