/* roulang page: index */
:root {
            --primary: #1e3a5f;
            --primary-light: #3b82f6;
            --primary-dark: #0b1120;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-white: #ffffff;
            --bg-light: #f8fafc;
            --bg-dark: #0b1120;
            --text-dark: #0f172a;
            --text-muted: #64748b;
            --text-light: #f8fafc;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 8px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.10);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body { font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif; background: var(--bg-white); color: var(--text-dark); line-height: 1.7; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        input, button, textarea { font-family: inherit; outline: none; border: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        @media (max-width: 640px) { .container { padding: 0 16px; } }

        /* nav */
        .nav-wrap { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); }
        .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .nav-logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 700; color: var(--primary-dark); letter-spacing: -0.3px; }
        .nav-logo i { color: var(--primary-light); font-size: 1.6rem; }
        .nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
        .nav-links a { font-size: 0.95rem; font-weight: 500; color: var(--text-muted); padding: 6px 0; position: relative; }
        .nav-links a:hover, .nav-links a.active { color: var(--primary-dark); }
        .nav-links a.active::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 100%; height: 2px; background: var(--primary-light); border-radius: 2px; }
        .nav-actions { display: flex; align-items: center; gap: 16px; }
        .nav-search { display: flex; align-items: center; background: var(--bg-light); border-radius: 40px; padding: 0 16px; border: 1px solid var(--border); transition: var(--transition); }
        .nav-search:focus-within { border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(59,130,246,0.15); }
        .nav-search input { background: transparent; padding: 8px 8px; font-size: 0.9rem; width: 140px; color: var(--text-dark); }
        .nav-search input::placeholder { color: #94a3b8; }
        .nav-search i { color: #94a3b8; font-size: 0.9rem; }
        .nav-cta { background: linear-gradient(135deg, var(--primary-light), #2563eb); color: #fff; padding: 10px 28px; border-radius: 40px; font-weight: 600; font-size: 0.9rem; transition: var(--transition); box-shadow: 0 4px 14px rgba(59,130,246,0.3); }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(59,130,246,0.4); }
        .nav-toggle { display: none; background: none; font-size: 1.5rem; color: var(--text-dark); cursor: pointer; padding: 4px; }
        @media (max-width: 768px) {
            .nav-links { display: none; position: absolute; top: 72px; left: 0; width: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); flex-direction: column; gap: 0; padding: 16px 24px; border-bottom: 1px solid var(--border); }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 12px 0; width: 100%; border-bottom: 1px solid var(--border); }
            .nav-links a:last-child { border-bottom: none; }
            .nav-search input { width: 100px; }
            .nav-cta { padding: 8px 20px; font-size: 0.85rem; }
            .nav-toggle { display: block; }
            .nav-actions .nav-search { display: none; }
        }
        @media (max-width: 520px) {
            .nav-inner { height: 64px; }
            .nav-logo { font-size: 1.15rem; }
            .nav-cta { padding: 6px 16px; font-size: 0.8rem; }
        }

        /* hero */
        .hero { position: relative; min-height: 90vh; display: flex; align-items: center; justify-content: center; background: var(--bg-dark); overflow: hidden; }
        .hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; opacity: 0.45; }
        .hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(11,17,32,0.92) 0%, rgba(11,17,32,0.70) 100%); }
        .hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; padding: 40px 24px; }
        .hero-badge { display: inline-block; background: rgba(59,130,246,0.20); border: 1px solid rgba(59,130,246,0.30); color: #93c5fd; padding: 6px 20px; border-radius: 40px; font-size: 0.85rem; font-weight: 500; letter-spacing: 0.5px; margin-bottom: 24px; backdrop-filter: blur(4px); }
        .hero h1 { font-size: clamp(2.6rem, 6vw, 4.2rem); font-weight: 800; color: #fff; line-height: 1.15; letter-spacing: -1px; margin-bottom: 20px; }
        .hero h1 span { color: var(--accent); }
        .hero p { font-size: 1.15rem; color: rgba(255,255,255,0.70); max-width: 600px; margin: 0 auto 32px; line-height: 1.8; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
        .hero-btn-primary { background: linear-gradient(135deg, var(--accent), #d97706); color: #0b1120; padding: 16px 40px; border-radius: 48px; font-weight: 700; font-size: 1.05rem; transition: var(--transition); box-shadow: 0 8px 28px rgba(245,158,11,0.35); }
        .hero-btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 36px rgba(245,158,11,0.45); }
        .hero-btn-secondary { background: rgba(255,255,255,0.08); backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,0.15); color: #fff; padding: 16px 36px; border-radius: 48px; font-weight: 600; font-size: 1.05rem; transition: var(--transition); }
        .hero-btn-secondary:hover { background: rgba(255,255,255,0.15); transform: translateY(-3px); }
        .hero-stats { display: flex; flex-wrap: wrap; justify-content: center; gap: 40px; margin-top: 48px; padding-top: 40px; border-top: 1px solid rgba(255,255,255,0.08); }
        .hero-stat { text-align: center; }
        .hero-stat .num { font-size: 2rem; font-weight: 800; color: #fff; }
        .hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.50); margin-top: 4px; }
        @media (max-width: 640px) {
            .hero { min-height: 80vh; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-btn-primary, .hero-btn-secondary { padding: 14px 28px; font-size: 0.95rem; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 1.5rem; }
        }

        /* section */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-light); }
        .section-dark { background: var(--bg-dark); color: #fff; }
        .section-title { text-align: center; margin-bottom: 56px; }
        .section-title h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 700; letter-spacing: -0.5px; }
        .section-title p { color: var(--text-muted); max-width: 560px; margin: 12px auto 0; font-size: 1.05rem; }
        .section-dark .section-title p { color: rgba(255,255,255,0.55); }

        /* cards */
        .card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; }
        .card { background: #fff; border-radius: var(--radius); padding: 32px 28px; box-shadow: var(--shadow); border: 1px solid var(--border); transition: var(--transition); }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .card-icon { width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 1.6rem; margin-bottom: 18px; }
        .card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 10px; }
        .card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }
        .card-alt { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); backdrop-filter: blur(4px); }
        .card-alt h3 { color: #fff; }
        .card-alt p { color: rgba(255,255,255,0.60); }

        /* cover cards */
        .cover-card { border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow); border: 1px solid var(--border); transition: var(--transition); }
        .cover-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .cover-card img { width: 100%; height: 200px; object-fit: cover; }
        .cover-card-body { padding: 20px 24px 24px; }
        .cover-card-body h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
        .cover-card-body p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }
        .cover-card-body .tag { display: inline-block; background: var(--bg-light); color: var(--primary-light); font-size: 0.75rem; font-weight: 600; padding: 2px 12px; border-radius: 40px; margin-bottom: 10px; }

        /* badge */
        .badge { display: inline-block; padding: 4px 14px; border-radius: 40px; font-size: 0.78rem; font-weight: 600; }
        .badge-blue { background: rgba(59,130,246,0.12); color: var(--primary-light); }
        .badge-gold { background: rgba(245,158,11,0.15); color: var(--accent); }

        /* steps */
        .steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; counter-reset: step; }
        .step-item { text-align: center; padding: 32px 20px; position: relative; }
        .step-item::before { counter-increment: step; content: counter(step); position: absolute; top: -8px; left: 50%; transform: translateX(-50%); width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--primary-light), #2563eb); color: #fff; font-weight: 700; font-size: 1.1rem; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 14px rgba(59,130,246,0.3); }
        .step-item .step-icon { font-size: 2rem; color: var(--primary-light); margin-bottom: 12px; margin-top: 20px; }
        .step-item h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
        .step-item p { color: var(--text-muted); font-size: 0.9rem; }

        /* faq */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: #fff; border-radius: var(--radius-sm); border: 1px solid var(--border); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: #cbd5e1; }
        .faq-question { padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600; font-size: 0.98rem; background: none; width: 100%; text-align: left; color: var(--text-dark); }
        .faq-question i { transition: transform 0.3s; color: var(--text-muted); }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 24px; color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; }
        .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }

        /* cta */
        .cta-section { background: linear-gradient(135deg, var(--bg-dark) 0%, #162044 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: 0.10; }
        .cta-content { position: relative; z-index: 2; max-width: 640px; margin: 0 auto; padding: 0 24px; }
        .cta-content h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 700; color: #fff; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.65); font-size: 1.05rem; margin-bottom: 32px; }
        .cta-btn { background: linear-gradient(135deg, var(--accent), #d97706); color: #0b1120; padding: 16px 48px; border-radius: 48px; font-weight: 700; font-size: 1.05rem; transition: var(--transition); box-shadow: 0 8px 28px rgba(245,158,11,0.30); display: inline-block; }
        .cta-btn:hover { transform: translateY(-3px); box-shadow: 0 14px 40px rgba(245,158,11,0.40); }

        /* footer */
        .footer { background: var(--bg-dark); color: rgba(255,255,255,0.70); padding: 60px 0 30px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .logo { font-size: 1.3rem; font-weight: 700; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
        .footer-brand .logo i { color: var(--primary-light); }
        .footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 300px; }
        .footer h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
        .footer ul a { font-size: 0.88rem; color: rgba(255,255,255,0.55); transition: var(--transition); }
        .footer ul a:hover { color: var(--accent); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); margin-top: 40px; padding-top: 24px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; font-size: 0.82rem; color: rgba(255,255,255,0.40); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
            .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .section { padding: 56px 0; }
        }

        /* post list */
        .post-list { display: grid; grid-template-columns: 1fr; gap: 16px; }
        .post-item { display: flex; align-items: flex-start; gap: 16px; padding: 16px 20px; background: #fff; border-radius: var(--radius-sm); border: 1px solid var(--border); transition: var(--transition); }
        .post-item:hover { border-color: var(--primary-light); box-shadow: 0 2px 12px rgba(59,130,246,0.08); }
        .post-item .date { font-size: 0.78rem; color: var(--text-muted); white-space: nowrap; min-width: 70px; padding-top: 2px; }
        .post-item .info { flex: 1; }
        .post-item .info h4 { font-size: 0.98rem; font-weight: 600; margin-bottom: 4px; }
        .post-item .info h4 a:hover { color: var(--primary-light); }
        .post-item .info .meta { font-size: 0.82rem; color: var(--text-muted); display: flex; gap: 12px; flex-wrap: wrap; }
        .post-item .info .meta .cat { color: var(--primary-light); font-weight: 500; }
        .post-empty { text-align: center; padding: 40px 20px; color: var(--text-muted); font-size: 0.95rem; background: var(--bg-light); border-radius: var(--radius-sm); }

        /* misc */
        .text-accent { color: var(--accent); }
        .text-primary-light { color: var(--primary-light); }
        .bg-accent { background: var(--accent); }
        .gap-2 { gap: 8px; }
        .gap-4 { gap: 16px; }
        .mt-2 { margin-top: 8px; }
        .mt-4 { margin-top: 16px; }
        .mb-4 { margin-bottom: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* img grid */
        .img-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
        .img-grid figure { border-radius: var(--radius-sm); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); }
        .img-grid figure:hover { transform: scale(1.02); box-shadow: var(--shadow-hover); }
        .img-grid img { width: 100%; height: 160px; object-fit: cover; }
        .img-grid figcaption { padding: 12px 16px; font-size: 0.9rem; font-weight: 500; background: #fff; }

        /* responsive extras */
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.7rem; }
            .card { padding: 24px 20px; }
            .cover-card-body { padding: 16px 18px 20px; }
            .post-item { flex-direction: column; gap: 6px; }
            .post-item .date { min-width: auto; }
        }

/* roulang page: category1 */
:root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --primary-light: #818CF8;
            --secondary: #F59E0B;
            --secondary-hover: #D97706;
            --accent: #06B6D4;
            --bg-dark: #0F172A;
            --bg-card: #1E293B;
            --text-white: #F8FAFC;
            --text-muted: #94A3B8;
            --border-dark: #334155;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.3);
            --shadow-hover: 0 16px 48px rgba(79,70,229,0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            line-height: 1.6;
            background: #F1F5F9;
            color: #1E293B;
            -webkit-font-smoothing: antialiased;
        }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; font-family: inherit; }
        input { font-family: inherit; }

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

        .nav-wrap {
            background: #FFFFFF;
            border-bottom: 1px solid #E2E8F0;
            box-shadow: 0 2px 16px rgba(0,0,0,0.04);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(12px);
            background: rgba(255,255,255,0.96);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .nav-logo i { font-size: 1.5rem; color: var(--secondary); }
        .nav-logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-links { display: flex; list-style: none; gap: 8px; }
        .nav-links li a {
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.95rem;
            font-weight: 500;
            color: #475569;
            transition: var(--transition);
            position: relative;
        }
        .nav-links li a:hover { color: var(--primary); background: #EEF2FF; }
        .nav-links li a.active {
            color: #FFFFFF;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(79,70,229,0.35);
        }
        .nav-links li a.active:hover { background: var(--primary-dark); }
        .nav-actions { display: flex; align-items: center; gap: 16px; }
        .nav-search {
            display: flex;
            align-items: center;
            background: #F1F5F9;
            border-radius: 10px;
            padding: 0 14px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); background: #FFFFFF; box-shadow: 0 0 0 4px rgba(79,70,229,0.1); }
        .nav-search i { color: #94A3B8; font-size: 0.9rem; }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 8px 10px;
            font-size: 0.9rem;
            color: #1E293B;
            width: 180px;
            outline: none;
        }
        .nav-search input::placeholder { color: #94A3B8; }
        .nav-cta {
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--secondary), #F97316);
            color: #FFFFFF;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(245,158,11,0.35);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(245,158,11,0.45); }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: #475569; padding: 4px 8px; border-radius: 8px; }
        .nav-toggle:hover { background: #F1F5F9; }

        .hero-banner {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            isolation: isolate;
        }
        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,27,75,0.78) 100%);
            z-index: 1;
        }
        .hero-banner > * { position: relative; z-index: 2; }
        .hero-banner h1 {
            font-size: clamp(2.2rem, 6vw, 3.8rem);
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: -0.02em;
            line-height: 1.2;
            text-shadow: 0 4px 30px rgba(0,0,0,0.3);
        }
        .hero-banner h1 i { color: var(--secondary); margin-right: 8px; }
        .hero-banner p {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: #CBD5E1;
            max-width: 640px;
            margin: 16px auto 0;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px);
            padding: 8px 20px;
            border-radius: 40px;
            color: #F8FAFC;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.15);
        }
        .hero-badge i { color: var(--secondary); }

        .section { padding: 80px 0; }
        .section-title {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            font-weight: 700;
            color: #0F172A;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .section-sub {
            text-align: center;
            color: #64748B;
            max-width: 600px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
        }
        .section-title i { color: var(--primary); margin-right: 8px; }

        .step-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 28px;
        }
        .step-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
            border: 1px solid #E2E8F0;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--primary-light); }
        .step-card .step-num {
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 3.2rem;
            font-weight: 800;
            color: rgba(79,70,229,0.08);
            line-height: 1;
        }
        .step-card .step-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: #FFFFFF;
            margin-bottom: 18px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .step-card h3 { font-size: 1.2rem; font-weight: 600; color: #0F172A; margin-bottom: 10px; }
        .step-card p { color: #64748B; font-size: 0.95rem; line-height: 1.7; }
        .step-card .step-img {
            margin-top: 18px;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid #E2E8F0;
        }
        .step-card .step-img img { width: 100%; height: 180px; object-fit: cover; transition: var(--transition); }
        .step-card:hover .step-img img { transform: scale(1.03); }

        .resource-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .resource-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
            border: 1px solid #E2E8F0;
            transition: var(--transition);
        }
        .resource-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .resource-card img { width: 100%; height: 180px; object-fit: cover; }
        .resource-card .res-body { padding: 20px 22px 24px; }
        .resource-card .res-body h4 { font-size: 1.05rem; font-weight: 600; color: #0F172A; margin-bottom: 6px; }
        .resource-card .res-body p { color: #64748B; font-size: 0.9rem; line-height: 1.6; margin-bottom: 14px; }
        .resource-card .res-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 500;
            background: #EEF2FF;
            color: var(--primary);
        }

        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius);
            border: 1px solid #E2E8F0;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); box-shadow: 0 2px 12px rgba(79,70,229,0.08); }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            color: #0F172A;
            cursor: pointer;
            font-size: 1rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 12px;
        }
        .faq-question i { color: var(--primary); font-size: 1.1rem; transition: var(--transition); }
        .faq-question .fa-chevron-down { margin-left: auto; color: #94A3B8; transition: var(--transition); }
        .faq-item.open .faq-question .fa-chevron-down { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px;
            color: #475569;
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        .cta-section {
            background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 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: 0.1;
            z-index: 0;
        }
        .cta-section > * { position: relative; z-index: 1; }
        .cta-section h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; color: #FFFFFF; margin-bottom: 12px; }
        .cta-section p { color: #94A3B8; font-size: 1.05rem; max-width: 520px; margin: 0 auto 28px; }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            background: linear-gradient(135deg, var(--secondary), #F97316);
            color: #FFFFFF;
            border-radius: 12px;
            font-weight: 600;
            font-size: 1.05rem;
            box-shadow: 0 8px 32px rgba(245,158,11,0.4);
            transition: var(--transition);
            border: none;
        }
        .cta-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(245,158,11,0.55); }

        .footer {
            background: #0F172A;
            color: #CBD5E1;
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { font-size: 1.3rem; font-weight: 700; color: #FFFFFF; display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
        .footer-brand .logo i { color: var(--secondary); }
        .footer-brand p { font-size: 0.92rem; line-height: 1.7; color: #94A3B8; }
        .footer h4 { color: #F1F5F9; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
        .footer ul li a { color: #94A3B8; font-size: 0.9rem; transition: var(--transition); display: flex; align-items: center; gap: 6px; }
        .footer ul li a:hover { color: #FFFFFF; }
        .footer-bottom {
            border-top: 1px solid #1E293B;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: #64748B;
        }

        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: #FFFFFF; border-bottom: 1px solid #E2E8F0; padding: 16px 20px; gap: 4px; box-shadow: 0 20px 40px rgba(0,0,0,0.08); }
            .nav-search { display: none; }
            .nav-search.open { display: flex; width: 100%; margin-top: 8px; }
            .nav-cta { padding: 8px 16px; font-size: 0.82rem; }
            .nav-cta span { display: none; }
            .nav-toggle { display: block; }
            .step-grid { grid-template-columns: 1fr; }
            .resource-grid { grid-template-columns: 1fr; }
            .hero-banner { min-height: 320px; padding: 40px 0; }
            .section { padding: 48px 0; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .nav-inner { height: 60px; }
            .nav-links.open { top: 60px; }
            .nav-logo { font-size: 1.1rem; }
            .nav-logo i { font-size: 1.2rem; }
            .hero-banner h1 { font-size: 1.8rem; }
            .step-card { padding: 24px 20px; }
            .step-card .step-num { font-size: 2.4rem; }
            .cta-btn { padding: 14px 28px; font-size: 0.95rem; width: 100%; justify-content: center; }
        }

/* roulang page: article */
:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --accent: #06b6d4;
            --neon: #10b981;
            --deep: #0f172a;
            --bg-light: #f8fafc;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --border-light: #e2e8f0;
            --radius-card: 1rem;
            --radius-btn: 0.75rem;
            --shadow-card: 0 4px 24px rgba(99, 102, 241, 0.08);
            --shadow-hover: 0 12px 40px rgba(99, 102, 241, 0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, sans-serif;
            background: #ffffff;
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        button,
        input {
            font-family: inherit;
            outline: none;
            border: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* Navigation */
        .nav-wrap {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 12px rgba(0, 0, 0, 0.04);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 1rem;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--deep);
            flex-shrink: 0;
        }
        .nav-logo i {
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .nav-logo:hover i {
            transform: rotate(-8deg) scale(1.1);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li a {
            display: block;
            padding: 0.5rem 1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-btn);
            transition: var(--transition);
            position: relative;
        }
        .nav-links li a:hover {
            color: var(--primary);
            background: rgba(99, 102, 241, 0.06);
        }
        .nav-links li a.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(99, 102, 241, 0.1);
        }
        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: 2rem;
            padding: 0.35rem 0.35rem 0.35rem 1rem;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-right: 0.4rem;
        }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 0.4rem 0.6rem;
            font-size: 0.9rem;
            width: 140px;
            color: var(--text-dark);
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search input:focus {
            outline: none;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 0.5rem 1.2rem;
            border-radius: 2rem;
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
            white-space: nowrap;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            padding: 0.4rem 0.6rem;
            font-size: 1.4rem;
            color: var(--text-dark);
            cursor: pointer;
            border-radius: 0.5rem;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-light);
        }
        @media (max-width: 1024px) {
            .nav-search input {
                width: 100px;
            }
        }
        @media (max-width: 820px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 1rem 0;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
                gap: 0;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links li a {
                padding: 0.75rem 1.5rem;
                border-radius: 0;
                font-size: 1rem;
            }
            .nav-links li a.active::after {
                display: none;
            }
            .nav-links li a.active {
                background: rgba(99, 102, 241, 0.08);
            }
            .nav-toggle {
                display: block;
            }
            .nav-search input {
                width: 120px;
            }
        }
        @media (max-width: 520px) {
            .nav-inner {
                height: 64px;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .nav-logo i {
                font-size: 1.3rem;
            }
            .nav-search {
                display: none;
            }
            .nav-cta {
                padding: 0.4rem 0.9rem;
                font-size: 0.8rem;
            }
        }

        /* Hero Banner */
        .article-hero {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #0f172a 100%);
            overflow: hidden;
            isolation: isolate;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(6, 182, 212, 0.1) 100%);
            z-index: 1;
        }
        .article-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            padding: 3rem 1.5rem;
        }
        .article-hero .hero-category {
            display: inline-block;
            background: rgba(99, 102, 241, 0.2);
            backdrop-filter: blur(4px);
            color: #a5b4fc;
            padding: 0.3rem 1.2rem;
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.3px;
            margin-bottom: 1.2rem;
            border: 1px solid rgba(99, 102, 241, 0.25);
        }
        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.25;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
            margin-bottom: 1.2rem;
        }
        .article-hero .hero-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        .article-hero .hero-meta i {
            margin-right: 0.35rem;
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .article-hero {
                min-height: 260px;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-hero .hero-meta {
                gap: 0.8rem;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.35rem;
            }
            .article-hero .hero-content {
                padding: 2rem 1rem;
            }
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-light);
            padding: 0.7rem 0;
        }
        .breadcrumb-wrap .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb-wrap .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .breadcrumb-wrap .breadcrumb li+li::before {
            content: '/';
            color: #cbd5e1;
            font-size: 0.8rem;
        }
        .breadcrumb-wrap .breadcrumb a {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .breadcrumb-wrap .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb-wrap .breadcrumb .current {
            color: var(--text-dark);
            font-weight: 500;
        }

        /* Article Main */
        .article-main {
            padding: 3rem 0 4rem;
            background: #ffffff;
        }
        .article-content-wrap {
            max-width: 820px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: var(--radius-card);
            padding: 2.5rem 3rem;
            box-shadow: 0 1px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid var(--border-light);
        }
        .article-content-wrap .article-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--deep);
            line-height: 1.3;
            margin-bottom: 1rem;
        }
        .article-content-wrap .article-meta {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            padding-bottom: 1.2rem;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 2rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-content-wrap .article-meta span {
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }
        .article-content-wrap .article-meta i {
            color: var(--primary);
        }
        .article-content-wrap .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-dark);
        }
        .article-content-wrap .article-body p {
            margin-bottom: 1.4rem;
        }
        .article-content-wrap .article-body h2,
        .article-content-wrap .article-body h3 {
            font-weight: 700;
            color: var(--deep);
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        .article-content-wrap .article-body h2 {
            font-size: 1.5rem;
        }
        .article-content-wrap .article-body h3 {
            font-size: 1.2rem;
        }
        .article-content-wrap .article-body ul,
        .article-content-wrap .article-body ol {
            margin-bottom: 1.4rem;
            padding-left: 1.5rem;
        }
        .article-content-wrap .article-body li {
            margin-bottom: 0.4rem;
        }
        .article-content-wrap .article-body img {
            border-radius: 0.75rem;
            margin: 1.5rem auto;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
        }
        .article-content-wrap .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content-wrap .article-body a:hover {
            color: var(--primary-dark);
        }
        .article-content-wrap .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-light);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 0.5rem 0.5rem 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-content-wrap .article-body code {
            background: #f1f5f9;
            padding: 0.2rem 0.5rem;
            border-radius: 0.3rem;
            font-size: 0.9em;
            color: var(--primary-dark);
        }
        .article-content-wrap .article-body pre {
            background: #0f172a;
            color: #e2e8f0;
            padding: 1.2rem 1.5rem;
            border-radius: 0.75rem;
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 0.9rem;
        }
        .article-content-wrap .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-light);
        }
        .article-content-wrap .article-tags .tag {
            display: inline-block;
            background: var(--bg-light);
            color: var(--text-muted);
            padding: 0.3rem 1rem;
            border-radius: 2rem;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .article-content-wrap .article-tags .tag:hover {
            background: rgba(99, 102, 241, 0.08);
            color: var(--primary);
            border-color: var(--primary);
        }
        @media (max-width: 768px) {
            .article-content-wrap {
                padding: 1.5rem 1.2rem;
            }
            .article-content-wrap .article-title {
                font-size: 1.4rem;
            }
            .article-content-wrap .article-body {
                font-size: 0.98rem;
                line-height: 1.8;
            }
        }
        @media (max-width: 520px) {
            .article-content-wrap {
                padding: 1.2rem 0.8rem;
                border: none;
                box-shadow: none;
                background: transparent;
            }
            .article-content-wrap .article-title {
                font-size: 1.2rem;
            }
            .article-content-wrap .article-meta {
                gap: 0.8rem;
                font-size: 0.8rem;
            }
        }

        /* Article Nav (prev/next) */
        .article-nav-wrap {
            max-width: 820px;
            margin: 1.5rem auto 0;
            display: flex;
            justify-content: space-between;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .article-nav-wrap a {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            padding: 0.6rem 1.4rem;
            border-radius: var(--radius-btn);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .article-nav-wrap a:hover {
            background: rgba(99, 102, 241, 0.06);
            color: var(--primary);
            border-color: var(--primary);
            transform: translateY(-1px);
        }

        /* Not Found */
        .not-found-box {
            text-align: center;
            padding: 4rem 2rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--primary);
            opacity: 0.3;
            margin-bottom: 1rem;
        }
        .not-found-box h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 0.8rem;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--primary);
            color: #fff;
            padding: 0.7rem 2rem;
            border-radius: 2rem;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-home:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(99, 102, 241, 0.3);
        }

        /* Related Posts */
        .related-section {
            background: var(--bg-light);
            padding: 3.5rem 0;
            border-top: 1px solid var(--border-light);
        }
        .related-section .section-title {
            text-align: center;
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 2rem;
        }
        .related-section .section-title i {
            color: var(--primary);
            margin-right: 0.5rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .related-card {
            background: #ffffff;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(99, 102, 241, 0.15);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: #e2e8f0;
        }
        .related-card .card-body {
            padding: 1rem 1.2rem 1.2rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body .card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 0.3rem;
        }
        .related-card .card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--deep);
            line-height: 1.4;
            margin-bottom: 0.5rem;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.6rem;
        }
        .related-card .card-body .card-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .related-card .card-body .card-meta i {
            color: var(--accent);
            margin-right: 0.2rem;
        }
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-card .card-img {
                height: 200px;
            }
        }

        /* CTA */
        .article-cta {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            padding: 3rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }
        .article-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .article-cta .cta-content {
            position: relative;
            z-index: 1;
        }
        .article-cta h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.8rem;
        }
        .article-cta p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 500px;
            margin: 0 auto 1.5rem;
            font-size: 1rem;
        }
        .article-cta .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 0.8rem 2.2rem;
            border-radius: 2rem;
            font-size: 1rem;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
        }
        .article-cta .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(99, 102, 241, 0.55);
        }
        @media (max-width: 768px) {
            .article-cta h2 {
                font-size: 1.4rem;
            }
            .article-cta p {
                font-size: 0.9rem;
            }
        }

        /* Footer */
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.8);
            padding: 3.5rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.8rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .footer-brand .logo i {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 1rem;
        }
        .footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer ul li {
            margin-bottom: 0.5rem;
        }
        .footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .footer ul li a:hover {
            color: var(--primary);
            transform: translateX(3px);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .footer-brand {
                grid-column: span 2;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-brand {
                grid-column: span 1;
            }
        }

        /* Utility */
        .ml-1 {
            margin-left: 0.25rem;
        }
        .ml-2 {
            margin-left: 0.5rem;
        }
        .mr-2 {
            margin-right: 0.5rem;
        }
        .mb-1 {
            margin-bottom: 0.25rem;
        }

        /* Scroll to top */
        .scroll-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 50;
            cursor: pointer;
        }
        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .scroll-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(99, 102, 241, 0.5);
        }