/* roulang page: index */
:root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a42;
            --accent: #e8b830;
            --accent-hover: #d4a520;
            --accent-light: #fdf3d5;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0d1117;
            --text-dark: #1a1a2e;
            --text-muted: #6c757d;
            --text-light: #f0f2f5;
            --border-light: #e9edf4;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.07);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.10);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-light); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 960px; }
        .section { padding: 80px 0; }
        .section-title { font-size: 2rem; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.01em; color: var(--text-dark); }
        .section-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 640px; margin: 0 auto 48px; line-height: 1.7; }
        .text-center { text-align: center; }

        /* Navigation — SaaS Command Bar style */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 4px rgba(0,0,0,0.02);
        }
        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            gap: 16px;
        }
        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-brand i { color: var(--accent); font-size: 1.4rem; }
        .navbar-brand:hover { color: var(--primary); }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }
        .navbar-nav .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus-visible {
            color: var(--primary);
            background: rgba(26,42,108,0.04);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: rgba(26,42,108,0.08);
            font-weight: 600;
        }
        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            position: relative;
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: 100px;
            padding: 0 16px;
            transition: all var(--transition);
            min-width: 180px;
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26,42,108,0.08);
            background: var(--bg-white);
        }
        .search-box i { color: var(--text-muted); font-size: 0.9rem; }
        .search-box input {
            border: none;
            background: transparent;
            padding: 8px 10px;
            font-size: 0.9rem;
            outline: none;
            width: 100%;
            color: var(--text-dark);
        }
        .search-box input::placeholder { color: var(--text-muted); }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            border: none;
            padding: 10px 28px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(26,42,108,0.20);
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26,42,108,0.30);
            color: #fff;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
        }
        .btn-cta:active { transform: translateY(0); }
        .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 10px 28px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
        }
        .btn-cta-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .navbar-toggler {
            display: none;
            background: none;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-size: 1.2rem;
            color: var(--text-dark);
            cursor: pointer;
            transition: all var(--transition);
        }
        .navbar-toggler:hover { background: var(--bg-light); }

        /* Hero */
        .hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 600px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(232,184,48,0.18);
            color: var(--accent);
            padding: 6px 18px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(232,184,48,0.15);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            max-width: 720px;
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.78);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 36px;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
        .hero .btn-cta {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            box-shadow: 0 4px 20px rgba(232,184,48,0.35);
            padding: 14px 36px;
            font-size: 1.05rem;
        }
        .hero .btn-cta:hover {
            background: var(--accent-hover);
            box-shadow: 0 8px 30px rgba(232,184,48,0.45);
            color: var(--primary-dark);
        }
        .hero .btn-cta-outline {
            border-color: rgba(255,255,255,0.5);
            color: #fff;
        }
        .hero .btn-cta-outline:hover {
            background: rgba(255,255,255,0.12);
            border-color: #fff;
            color: #fff;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 60px;
            flex-wrap: wrap;
        }
        .hero-stat { color: rgba(255,255,255,0.85); }
        .hero-stat .num { font-size: 1.8rem; font-weight: 700; color: #fff; display: block; line-height: 1.2; }
        .hero-stat .label { font-size: 0.9rem; opacity: 0.7; }

        /* Feature / Advantage cards */
        .feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 28px; }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(26,42,108,0.08);
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--accent-light);
            color: var(--accent-hover);
            font-size: 1.6rem;
            margin-bottom: 18px;
        }
        .feature-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; color: var(--text-dark); }
        .feature-card p { font-size: 0.95rem; color: var(--text-muted); line-height: 1.7; margin: 0; }

        /* Steps */
        .steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; counter-reset: step; }
        .step-item { text-align: center; counter-increment: step; }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.4rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 4px 16px rgba(26,42,108,0.15);
        }
        .step-item h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; }
        .step-item p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.6; margin: 0; }

        /* CMS / Content list */
        .content-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }
        .content-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .content-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .content-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--border-light);
        }
        .content-card .card-body { padding: 20px 24px; }
        .content-card .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: rgba(26,42,108,0.06);
            padding: 3px 12px;
            border-radius: 100px;
            margin-bottom: 10px;
        }
        .content-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
        .content-card h3 a { color: var(--text-dark); }
        .content-card h3 a:hover { color: var(--primary); }
        .content-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; }
        .content-card .meta { font-size: 0.82rem; color: var(--text-muted); display: flex; gap: 16px; }
        .content-card .meta i { margin-right: 4px; }
        .empty-list { text-align: center; padding: 60px 20px; color: var(--text-muted); font-size: 1.05rem; background: var(--bg-white); border-radius: var(--radius-md); border: 1px dashed var(--border-light); }

        /* Features / Highlights section */
        .highlight-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
        .highlight-image { border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-md); }
        .highlight-image img { width: 100%; height: 360px; object-fit: cover; }
        .highlight-text h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 16px; }
        .highlight-text ul { list-style: none; padding: 0; }
        .highlight-text ul li {
            padding: 10px 0;
            display: flex;
            gap: 12px;
            align-items: flex-start;
            font-size: 0.98rem;
            color: var(--text-dark);
            border-bottom: 1px solid var(--border-light);
        }
        .highlight-text ul li:last-child { border-bottom: none; }
        .highlight-text ul li i { color: var(--accent-hover); font-size: 1.1rem; margin-top: 2px; }

        /* FAQ */
        .faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: rgba(26,42,108,0.12); }
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(26,42,108,0.02); }
        .faq-question i { color: var(--text-muted); transition: transform var(--transition); font-size: 0.9rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 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-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { font-size: 2.2rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
        .cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 32px; }
        .cta-section .btn-cta {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 14px 40px;
            font-size: 1.05rem;
            box-shadow: 0 4px 24px rgba(232,184,48,0.30);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-hover);
            color: var(--primary-dark);
            box-shadow: 0 8px 32px rgba(232,184,48,0.40);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 48px 0 32px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .logo { font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 12px; display: block; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h5 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col ul { list-style: none; padding: 0; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: color var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            margin-top: 36px;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
        }
        .footer-bottom span { color: rgba(255,255,255,0.4); }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* Responsive */
        @media (max-width: 992px) {
            .navbar-nav { display: none; }
            .navbar-toggler { display: block; }
            .navbar-nav.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-white);
                padding: 16px 24px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                gap: 4px;
            }
            .search-box { min-width: 120px; }
            .hero h1 { font-size: 2.4rem; }
            .hero { padding: 80px 0 60px; min-height: auto; }
            .highlight-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero-stats { gap: 24px; }
        }
        @media (max-width: 768px) {
            .section { padding: 60px 0; }
            .section-title { font-size: 1.6rem; }
            .hero h1 { font-size: 1.9rem; }
            .hero p { font-size: 1rem; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero .btn-cta, .hero .btn-cta-outline { justify-content: center; }
            .feature-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; }
            .content-list { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.6rem; }
            .navbar-actions .search-box { display: none; }
            .hero-stats { flex-direction: column; gap: 16px; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.6rem; }
            .steps-grid { grid-template-columns: 1fr; }
            .navbar-brand { font-size: 1.1rem; }
            .btn-cta { padding: 8px 20px; font-size: 0.85rem; }
            .container { padding: 0 16px; }
            .section { padding: 44px 0; }
        }
        .navbar-nav.mobile-open .nav-link { padding: 12px 16px; width: 100%; }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

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

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

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

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 0;
            width: 100%;
        }

        .navbar-brand {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .navbar-brand i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .navbar-brand:hover {
            color: var(--primary);
        }

        .navbar-nav {
            display: flex;
            list-style: none;
            gap: 4px;
            margin: 0;
            padding: 0;
            flex: 1;
            justify-content: center;
        }

        .navbar-nav .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 0 16px;
            height: 40px;
            transition: var(--transition);
            min-width: 180px;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }
        .search-box i {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-right: 8px;
        }
        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            color: var(--text);
            width: 100%;
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-cta i {
            font-size: 0.85rem;
        }
        .btn-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-cta:active {
            transform: translateY(0);
        }

        .navbar-toggler {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-size: 1.2rem;
            color: var(--text);
            cursor: pointer;
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            background: var(--bg-alt);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }
        .article-hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }

        .article-breadcrumb {
            display: flex;
            gap: 8px;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }
        .article-breadcrumb a:hover {
            color: #fff;
        }
        .article-breadcrumb .sep {
            opacity: 0.5;
        }

        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            max-width: 850px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
        }
        .article-meta i {
            margin-right: 6px;
        }
        .article-meta .badge-cat {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 50px;
            font-size: 0.8rem;
            color: #fff;
            backdrop-filter: blur(4px);
        }

        /* ===== Article Content ===== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }

        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 44px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--text);
            letter-spacing: -0.3px;
        }
        .article-body h2:first-child {
            margin-top: 0;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--text);
        }
        .article-body p {
            margin-bottom: 18px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 18px 20px;
            color: var(--text-secondary);
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-md);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: var(--primary-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 20px 0;
        }
        .article-body code {
            font-family: 'JetBrains Mono', monospace;
            font-size: 0.9em;
            background: var(--bg-alt);
            padding: 2px 8px;
            border-radius: 4px;
            color: var(--primary);
        }
        .article-body pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .article-not-found i {
            font-size: 3rem;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .article-not-found h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .article-not-found .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .article-not-found .btn-back:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .sidebar-card h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h5 i {
            color: var(--primary);
        }

        .sidebar-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list li:last-child {
            border-bottom: none;
        }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.5;
            transition: var(--transition);
        }
        .sidebar-list a:hover {
            color: var(--primary);
        }
        .sidebar-list a i {
            color: var(--accent);
            font-size: 0.7rem;
            margin-top: 6px;
            flex-shrink: 0;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
            border-color: transparent;
            color: #fff;
            text-align: center;
        }
        .sidebar-cta h5 {
            color: #fff;
            justify-content: center;
        }
        .sidebar-cta p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .sidebar-cta .btn-light {
            background: #fff;
            color: var(--primary);
            border: none;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .sidebar-cta .btn-light:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-alt);
        }
        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .related-section .section-sub {
            color: var(--text-secondary);
            margin-bottom: 36px;
            font-size: 1.05rem;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            height: 180px;
            background: var(--bg-alt);
            overflow: hidden;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px 24px 24px;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card .card-body h4 a {
            color: var(--text);
        }
        .related-card .card-body h4 a:hover {
            color: var(--primary);
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .related-card .card-meta {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            gap: 16px;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .faq-section .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
            text-align: center;
        }
        .faq-section .section-sub {
            color: var(--text-secondary);
            margin-bottom: 40px;
            text-align: center;
            font-size: 1.05rem;
        }

        .faq-grid {
            max-width: 800px;
            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-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }

        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.8rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: var(--accent);
            color: #0f172a;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .cta-section .btn-cta-large:hover {
            background: #fff;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(245, 158, 11, 0.3);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: #fff;
        }
        .footer-col ul a i {
            width: 20px;
            margin-right: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .article-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }
            .container {
                padding: 0 16px;
            }

            .navbar-nav {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                z-index: 1040;
            }
            .navbar-nav.open {
                display: flex;
            }
            .navbar-nav .nav-link {
                padding: 12px 16px;
                font-size: 1rem;
            }

            .search-box {
                min-width: 120px;
                height: 36px;
            }
            .search-box input {
                width: 80px;
            }

            .navbar-toggler {
                display: block;
            }
            .navbar-actions .btn-cta span {
                display: none;
            }

            .article-hero {
                padding: 60px 0 40px;
                min-height: 240px;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-meta {
                gap: 12px;
                font-size: 0.8rem;
            }

            .article-body {
                padding: 24px 20px;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }

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

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

            .faq-question {
                padding: 14px 18px;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 18px 14px;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section .btn-cta-large {
                padding: 14px 28px;
                font-size: 1rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-body {
                padding: 18px 14px;
            }
            .navbar-brand {
                font-size: 1.1rem;
            }
            .search-box {
                min-width: 80px;
            }
            .search-box input {
                width: 60px;
            }
            .btn-cta {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a9e;
            --primary-dark: #0f1a42;
            --accent: #f5a623;
            --accent-light: #f7c35a;
            --accent-dark: #d48e1a;
            --bg-white: #ffffff;
            --bg-light: #f8f9fc;
            --bg-dark: #0f1a42;
            --bg-gradient: linear-gradient(135deg, #1a2a6c 0%, #2d4a9e 50%, #1a2a6c 100%);
            --text-dark: #1a1a2e;
            --text-body: #3d3d5c;
            --text-muted: #7a7a9a;
            --text-light: #f0f0f5;
            --border-light: #e8e8f0;
            --border-medium: #d0d0e0;
            --shadow-sm: 0 2px 8px rgba(26, 42, 108, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 108, 0.10);
            --shadow-lg: 0 16px 48px rgba(26, 42, 108, 0.14);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            outline: none;
            border: none;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        /* ===== Bootstrap Overrides ===== */
        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }
        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            padding: 10px 28px;
            transition: var(--transition);
            border: 2px solid transparent;
            font-size: 0.95rem;
        }
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: #fff;
        }
        .btn-accent {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
        }
        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            background: transparent;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
        }
        .btn-lg {
            padding: 14px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }
        .badge {
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            letter-spacing: 0.3px;
        }
        .badge-accent {
            background: var(--accent);
            color: #fff;
        }
        .badge-primary {
            background: var(--primary);
            color: #fff;
        }
        .card {
            border: none;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
            background: var(--bg-white);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .card-body {
            padding: 28px 24px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.75rem;
            letter-spacing: -0.3px;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto 2rem;
        }
        .text-accent {
            color: var(--accent) !important;
        }
        .bg-soft-primary {
            background: var(--bg-light);
        }
        .bg-dark-theme {
            background: var(--bg-gradient);
            color: var(--text-light);
        }

        /* ===== Header / Nav (SaaS Command Bar Style) ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px) saturate(1.4);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 12px rgba(26, 42, 108, 0.04);
            height: 70px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar {
            display: flex;
            align-items: center;
            width: 100%;
            gap: 32px;
            padding: 0;
        }
        .navbar-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: -0.2px;
        }
        .navbar-brand i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .navbar-brand:hover {
            color: var(--primary);
        }
        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .navbar-nav .nav-link {
            padding: 8px 16px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            font-size: 0.92rem;
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.04);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.08);
            font-weight: 600;
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .navbar-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-left: auto;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 50px;
            padding: 6px 18px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            min-width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(45, 74, 158, 0.12);
        }
        .search-box i {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-right: 8px;
        }
        .search-box input {
            background: transparent;
            border: none;
            padding: 6px 0;
            font-size: 0.9rem;
            color: var(--text-dark);
            width: 100%;
            outline: none;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            border: none;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-cta i {
            font-size: 1rem;
        }
        .btn-cta:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .navbar-toggler {
            display: none;
            background: transparent;
            border: 1px solid var(--border-medium);
            border-radius: var(--radius-sm);
            padding: 8px 14px;
            font-size: 1.2rem;
            color: var(--text-dark);
            cursor: pointer;
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            background: var(--bg-light);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 80px 0 100px;
            background: var(--bg-gradient);
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 8px 20px;
            border-radius: 50px;
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-badge i {
            color: var(--accent);
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            max-width: 800px;
        }
        .hero-title span {
            color: var(--accent);
        }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 50px;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            color: rgba(255, 255, 255, 0.9);
        }
        .hero-stat-item .num {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            display: block;
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            opacity: 0.75;
        }

        /* ===== Guide Methods Section ===== */
        .guide-methods {
            padding: 80px 0;
        }
        .method-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border-light);
            text-align: center;
        }
        .method-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .method-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .method-card:hover .method-icon {
            background: var(--primary);
            color: #fff;
        }
        .method-card h5 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .method-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== Steps Section ===== */
        .steps-section {
            padding: 80px 0;
            background: var(--bg-light);
        }
        .step-item {
            display: flex;
            gap: 24px;
            padding: 28px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            margin-bottom: 20px;
            transition: var(--transition);
            border-left: 4px solid var(--accent);
            align-items: flex-start;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .step-content h5 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
        }
        .step-content p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 80px 0;
        }
        .accordion-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .accordion-button {
            font-weight: 600;
            color: var(--text-dark);
            padding: 18px 24px;
            font-size: 1rem;
            background: var(--bg-white);
            border: none;
            box-shadow: none;
        }
        .accordion-button:not(.collapsed) {
            background: var(--bg-light);
            color: var(--primary);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary-light);
        }
        .accordion-button::after {
            background-size: 1rem;
            transition: var(--transition);
        }
        .accordion-body {
            padding: 8px 24px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-gradient);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-box {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
        }
        .cta-box .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            padding: 16px 40px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .cta-box .btn-cta-large:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(245, 166, 35, 0.35);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 30px;
        }
        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .search-box {
                min-width: 140px;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                height: 62px;
            }
            .navbar-nav {
                display: none;
                position: absolute;
                top: 62px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 16px 20px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                z-index: 1040;
            }
            .navbar-nav.open {
                display: flex;
            }
            .navbar-nav .nav-link {
                padding: 12px 16px;
                width: 100%;
                font-size: 1rem;
            }
            .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-toggler {
                display: block;
            }
            .navbar-actions .search-box {
                display: none;
            }
            .navbar-actions .btn-cta {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
            .navbar-actions .btn-cta span {
                display: none;
            }
            .hero-section {
                padding: 60px 0 70px;
                min-height: auto;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-item .num {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .guide-methods,
            .steps-section,
            .faq-section,
            .cta-section {
                padding: 50px 0;
            }
            .method-card {
                padding: 24px 20px;
            }
            .step-item {
                flex-direction: column;
                gap: 12px;
                padding: 20px 18px;
            }
            .step-num {
                width: 36px;
                height: 36px;
                font-size: 0.95rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .cta-box h2 {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                text-align: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .navbar-brand {
                font-size: 1.05rem;
            }
            .navbar-brand i {
                font-size: 1.1rem;
            }
            .btn-cta {
                padding: 6px 14px;
                font-size: 0.75rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
            .cta-box .btn-cta-large {
                padding: 14px 28px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible,
        .nav-link:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Cover Image in Steps ===== */
        .step-cover {
            margin-top: 12px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            max-width: 480px;
            box-shadow: var(--shadow-sm);
        }
        .step-cover img {
            width: 100%;
            display: block;
        }

        /* ===== Extra spacing utilities ===== */
        .mt-1\.5 {
            margin-top: 0.5rem;
        }
        .gap-3 {
            gap: 1rem;
        }