/* roulang page: index */
:root {
            --primary: #1a3a6b;
            --primary-light: #2a5a9f;
            --primary-dark: #0f2444;
            --accent: #e8a838;
            --accent-light: #f0c06a;
            --accent-dark: #c88a1e;
            --bg-light: #f8f9fc;
            --bg-dark: #0f1a2e;
            --text-dark: #1a2332;
            --text-muted: #6b7a8f;
            --text-light: #eef2f7;
            --border: #e0e5eb;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.15);
            --transition: all 0.3s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --spacing-section: 5rem;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-sans);
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul { list-style: none; }

        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 12px rgba(0,0,0,0.04);
        }

        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            flex-wrap: wrap;
        }

        .logo-brand {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo-brand i { color: var(--accent); font-size: 1.4rem; }
        .logo-brand:hover { color: var(--primary-dark); }

        .nav-cards {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .nav-card-item {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1.1rem;
            border-radius: 50px;
            background: transparent;
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.9rem;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .nav-card-item i { font-size: 0.85rem; color: var(--accent); }
        .nav-card-item:hover {
            background: var(--bg-light);
            border-color: var(--border);
            color: var(--primary);
        }
        .nav-card-item.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(26,58,107,0.25);
        }
        .nav-card-item.active i { color: var(--accent-light); }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1.5rem;
            border-radius: 50px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.9rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .nav-cta:hover { background: var(--accent-light); color: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(232,168,56,0.35); }

        /* Mobile toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.25rem;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 6rem 0 5rem;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a44 60%, #2a3f5e 100%);
            overflow: hidden;
            min-height: 75vh;
            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: 0.18;
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0; right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-light), transparent);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 800px;
        }
        .hero-badge {
            display: inline-block;
            padding: 0.35rem 1.2rem;
            border-radius: 50px;
            background: rgba(232,168,56,0.18);
            color: var(--accent-light);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 1.2rem;
            border: 1px solid rgba(232,168,56,0.25);
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 1.2rem;
            letter-spacing: -0.5px;
        }
        .hero-title span { color: var(--accent); }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.78);
            line-height: 1.8;
            margin-bottom: 2rem;
            max-width: 640px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.85rem 2rem;
            border-radius: 50px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(232,168,56,0.35);
        }
        .btn-primary:hover { background: var(--accent-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(232,168,56,0.45); }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.85rem 2rem;
            border-radius: 50px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: 1.5px solid rgba(255,255,255,0.3);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline-light:hover { background: rgba(255,255,255,0.08); border-color: var(--accent); color: var(--accent); }

        .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stat-item { text-align: center; }
        .hero-stat-num { font-size: 2rem; font-weight: 800; color: #fff; line-height: 1.2; }
        .hero-stat-num span { color: var(--accent); }
        .hero-stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.6); margin-top: 0.2rem; }

        /* ===== Section Common ===== */
        .section-padding { padding: var(--spacing-section) 0; }
        .section-title-wrap { text-align: center; margin-bottom: 3rem; }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 0.8rem;
            letter-spacing: -0.3px;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 620px;
            margin: 0 auto;
        }
        .section-label {
            display: inline-block;
            padding: 0.25rem 1rem;
            border-radius: 50px;
            background: rgba(26,58,107,0.08);
            color: var(--primary-light);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 0.8rem;
            text-transform: uppercase;
        }

        /* ===== Features / Cards ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.8rem;
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent); }
        .feature-icon {
            width: 60px; height: 60px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 1.2rem;
            font-size: 1.6rem;
            color: #fff;
        }
        .feature-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--primary); margin-bottom: 0.6rem; }
        .feature-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.7; }

        /* ===== Info Cards / CMS List ===== */
        .info-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.8rem;
        }
        .info-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .info-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .info-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .info-card-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .info-card-tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            background: rgba(26,58,107,0.08);
            color: var(--primary-light);
            font-size: 0.7rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
            align-self: flex-start;
        }
        .info-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--text-dark); margin-bottom: 0.5rem; line-height: 1.4; }
        .info-card p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; flex: 1; }
        .info-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 1rem;
            padding-top: 0.8rem;
            border-top: 1px solid var(--border);
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .info-card-meta .date i { margin-right: 0.3rem; }
        .info-card-meta .read-more { color: var(--primary-light); font-weight: 600; }
        .info-card-meta .read-more:hover { color: var(--primary); }

        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 3rem 1rem;
            color: var(--text-muted);
            font-size: 1rem;
            background: #fff;
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            counter-reset: step;
        }
        .process-step {
            text-align: center;
            position: relative;
            counter-increment: step;
        }
        .process-step::before {
            content: counter(step);
            width: 48px; height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 1.2rem;
            box-shadow: 0 4px 16px rgba(26,58,107,0.2);
        }
        .process-step h4 { font-size: 1.05rem; font-weight: 700; color: var(--primary); margin-bottom: 0.4rem; }
        .process-step p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }

        /* ===== Testimonial / Social Proof ===== */
        .testimonial-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 2rem 1.8rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .testimonial-card:hover { box-shadow: var(--shadow-md); }
        .testimonial-stars { color: var(--accent); font-size: 0.9rem; margin-bottom: 0.8rem; letter-spacing: 2px; }
        .testimonial-text { font-size: 0.95rem; color: var(--text-muted); line-height: 1.8; font-style: italic; margin-bottom: 1.2rem; }
        .testimonial-author { display: flex; align-items: center; gap: 0.8rem; }
        .testimonial-avatar {
            width: 44px; height: 44px;
            border-radius: 50%;
            background: var(--primary);
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-weight: 700; font-size: 1rem;
        }
        .testimonial-name { font-weight: 700; color: var(--text-dark); font-size: 0.9rem; }
        .testimonial-role { font-size: 0.78rem; color: var(--text-muted); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            margin-bottom: 0.8rem;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); box-shadow: var(--shadow-sm); }
        .faq-question {
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.98rem;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question i { color: var(--primary-light); transition: var(--transition); font-size: 0.85rem; }
        .faq-question[aria-expanded="true"] i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.8;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 4.5rem 0;
            text-align: center;
            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;
            z-index: 1;
        }
        .cta-content { position: relative; z-index: 2; }
        .cta-title { font-size: 2.2rem; font-weight: 800; color: #fff; margin-bottom: 1rem; }
        .cta-desc { font-size: 1.05rem; color: rgba(255,255,255,0.8); max-width: 580px; margin: 0 auto 2rem; }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.9rem 2.5rem;
            border-radius: 50px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 24px rgba(232,168,56,0.4);
        }
        .cta-btn:hover { background: var(--accent-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 36px rgba(232,168,56,0.5); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand .logo-brand { color: #fff; margin-bottom: 1rem; }
        .footer-brand p { font-size: 0.88rem; line-height: 1.8; max-width: 320px; }
        .footer-col h5 { color: #fff; font-size: 0.95rem; font-weight: 700; margin-bottom: 1rem; }
        .footer-col ul li { margin-bottom: 0.5rem; }
        .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.85rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }
        .footer-social { display: flex; gap: 0.8rem; }
        .footer-social a {
            width: 36px; height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex; align-items: center; justify-content: center;
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: var(--primary-dark); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.6rem; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-cards {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 1rem 0;
                gap: 0.3rem;
            }
            .nav-cards.open { display: flex; }
            .nav-card-item { border-radius: var(--radius-sm); padding: 0.7rem 1rem; justify-content: center; }
            .nav-cta { justify-content: center; margin-top: 0.5rem; }

            .hero-section { padding: 4rem 0 3rem; min-height: auto; }
            .hero-title { font-size: 2rem; }
            .hero-desc { font-size: 1rem; }
            .hero-stats { gap: 1.2rem; flex-wrap: wrap; }
            .hero-stat-num { font-size: 1.5rem; }

            .section-title { font-size: 1.7rem; }
            .section-padding { padding: 3rem 0; }
            .features-grid { grid-template-columns: 1fr; }
            .info-grid { grid-template-columns: 1fr; }
            .process-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }

            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-brand p { max-width: 100%; }
            .footer-bottom { flex-direction: column; text-align: center; }

            .cta-title { font-size: 1.6rem; }
            .testimonial-card { padding: 1.5rem; }
        }

        @media (max-width: 520px) {
            .hero-title { font-size: 1.6rem; }
            .hero-actions { flex-direction: column; width: 100%; }
            .btn-primary, .btn-outline-light { width: 100%; justify-content: center; }
            .hero-stats { flex-direction: column; gap: 1rem; }
            .process-grid { grid-template-columns: 1fr; }
            .section-title { font-size: 1.4rem; }
            .container { padding: 0 1rem; }
            .info-card-body { padding: 1.2rem; }
            .faq-question { padding: 1rem 1.2rem; font-size: 0.9rem; }
            .faq-answer { padding: 0 1.2rem 1rem; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 2rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f6cbf;
            --primary-dark: #0a4f8a;
            --primary-light: #e8f0fe;
            --secondary: #f5a623;
            --secondary-light: #fef3e0;
            --accent: #2ec4b6;
            --bg-body: #f7f9fc;
            --bg-card: #ffffff;
            --bg-dark: #1a2a3a;
            --bg-soft: #eef2f7;
            --text-dark: #1a2a3a;
            --text-body: #3d4f5f;
            --text-light: #7a8a9a;
            --text-white: #ffffff;
            --border-light: #e2e8f0;
            --border-card: #e8edf2;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(15, 108, 191, 0.06);
            --shadow-md: 0 6px 24px rgba(15, 108, 191, 0.10);
            --shadow-lg: 0 14px 44px rgba(15, 108, 191, 0.14);
            --shadow-hover: 0 18px 48px rgba(15, 108, 191, 0.18);
            --transition: all 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --content-width: 820px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            overflow-x: hidden;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover, a:focus { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); color: var(--text-dark); line-height: 1.3; font-weight: 700; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Header / Navigation ===== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
        }
        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 12px 0;
            flex-wrap: wrap;
        }
        .logo-brand {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            font-family: var(--font-heading);
        }
        .logo-brand i { color: var(--primary); font-size: 1.5rem; }
        .logo-brand:hover { color: var(--primary); }
        .nav-toggle {
            display: none;
            background: none;
            border: 2px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 8px 14px;
            font-size: 1.4rem;
            color: var(--text-dark);
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-toggle:hover { background: var(--bg-soft); border-color: var(--primary); color: var(--primary); }
        .nav-cards {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-card-item {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-md);
            background: transparent;
            color: var(--text-body);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .nav-card-item i { font-size: 1rem; color: var(--text-light); transition: var(--transition); }
        .nav-card-item:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
            transform: translateY(-1px);
        }
        .nav-card-item:hover i { color: var(--primary); }
        .nav-card-item.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(15, 108, 191, 0.25);
        }
        .nav-card-item.active i { color: var(--text-white); }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 26px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--secondary), #e8961e);
            color: #1a2a3a;
            font-weight: 700;
            font-size: 0.95rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.35);
        }
        .nav-cta i { color: #1a2a3a; font-size: 0.9rem; transition: var(--transition); }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 166, 35, 0.45);
            color: #1a2a3a;
            background: linear-gradient(135deg, #fbb03b, #e8961e);
        }
        @media (max-width: 868px) {
            .nav-toggle { display: block; }
            .nav-cards {
                display: none;
                width: 100%;
                flex-direction: column;
                background: var(--bg-card);
                border-radius: var(--radius-md);
                padding: 16px;
                border: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                margin-top: 8px;
            }
            .nav-cards.open { display: flex; }
            .nav-card-item, .nav-cta { width: 100%; justify-content: center; padding: 12px 18px; }
            .nav-cta { margin-top: 6px; }
        }
        @media (max-width: 480px) {
            .logo-brand { font-size: 1.2rem; }
            .nav-card-item { font-size: 0.9rem; padding: 10px 14px; }
        }

        /* ===== Hero / Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 108, 191, 0.75) 0%, rgba(26, 42, 58, 0.88) 100%);
            z-index: 1;
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 18px;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.85); }
        .article-breadcrumb a:hover { color: #fff; }
        .article-breadcrumb .sep { color: rgba(255,255,255,0.4); margin: 0 4px; }
        .article-banner h1 {
            font-size: 2.6rem;
            color: var(--text-white);
            max-width: 850px;
            line-height: 1.25;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            color: rgba(255,255,255,0.85);
            font-size: 0.95rem;
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .meta-item i { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
        .article-meta .cat-badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 30px;
            background: var(--secondary);
            color: #1a2a3a;
            font-weight: 600;
            font-size: 0.85rem;
        }
        @media (max-width: 768px) {
            .article-banner { padding: 50px 0 40px; }
            .article-banner h1 { font-size: 1.8rem; }
            .article-meta { gap: 10px 16px; font-size: 0.85rem; }
        }
        @media (max-width: 480px) {
            .article-banner h1 { font-size: 1.5rem; }
            .article-banner { padding: 40px 0 30px; }
        }

        /* ===== Article Content ===== */
        .article-section { padding: 50px 0 60px; }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 52px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            max-width: var(--content-width);
            margin: 0 auto;
            width: 100%;
        }
        .article-body .content-not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-body .content-not-found i {
            font-size: 3.5rem;
            color: var(--text-light);
            margin-bottom: 18px;
            display: block;
        }
        .article-body .content-not-found h3 {
            font-size: 1.6rem;
            margin-bottom: 12px;
        }
        .article-body .content-not-found p {
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .article-body .content-not-found .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-md);
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .article-body .content-not-found .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* Article content typography */
        .article-body .cms-content h2 { font-size: 1.7rem; margin: 36px 0 16px; padding-bottom: 8px; border-bottom: 2px solid var(--primary-light); }
        .article-body .cms-content h3 { font-size: 1.35rem; margin: 28px 0 12px; }
        .article-body .cms-content h4 { font-size: 1.15rem; margin: 22px 0 10px; font-weight: 600; }
        .article-body .cms-content p { margin-bottom: 18px; line-height: 1.85; color: var(--text-body); }
        .article-body .cms-content ul, .article-body .cms-content ol { margin: 0 0 18px 24px; list-style: disc; }
        .article-body .cms-content ol { list-style: decimal; }
        .article-body .cms-content li { margin-bottom: 6px; line-height: 1.75; }
        .article-body .cms-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-dark);
            font-style: normal;
        }
        .article-body .cms-content blockquote p:last-child { margin-bottom: 0; }
        .article-body .cms-content img { margin: 24px auto; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
        .article-body .cms-content a { color: var(--primary); font-weight: 500; border-bottom: 1px solid transparent; }
        .article-body .cms-content a:hover { border-bottom-color: var(--primary); }
        .article-body .cms-content code {
            background: var(--bg-soft);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }
        .article-body .cms-content pre {
            background: var(--bg-dark);
            color: #e8edf2;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-body .cms-content pre code { background: transparent; color: inherit; padding: 0; }
        .article-body .cms-content table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 0.95rem; }
        .article-body .cms-content table th, .article-body .cms-content table td { border: 1px solid var(--border-light); padding: 12px 16px; text-align: left; }
        .article-body .cms-content table th { background: var(--bg-soft); font-weight: 600; color: var(--text-dark); }
        @media (max-width: 768px) {
            .article-body { padding: 28px 20px; }
            .article-body .cms-content h2 { font-size: 1.4rem; }
            .article-body .cms-content h3 { font-size: 1.2rem; }
            .article-body .cms-content pre { padding: 14px 16px; font-size: 0.82rem; }
        }

        /* ===== Article Footer (tags, share) ===== */
        .article-footer-bar {
            max-width: var(--content-width);
            margin: 30px auto 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
        }
        .article-tags .tag-label { font-size: 0.9rem; color: var(--text-light); font-weight: 500; }
        .article-tags .tag-item {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 30px;
            background: var(--bg-soft);
            color: var(--text-body);
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .article-tags .tag-item:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .article-share span { font-size: 0.9rem; color: var(--text-light); font-weight: 500; }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-soft);
            color: var(--text-body);
            font-size: 1rem;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .article-share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
        @media (max-width: 600px) {
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
        }

        /* ===== Related Posts ===== */
        .related-section { background: var(--bg-soft); padding: 50px 0; }
        .related-section .section-title { text-align: center; margin-bottom: 36px; }
        .related-section .section-title h2 { font-size: 2rem; font-weight: 700; }
        .related-section .section-title p { color: var(--text-light); font-size: 1rem; margin-top: 8px; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-card .card-img {
            width: 100%;
            height: 190px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body { padding: 20px 22px 24px; }
        .related-card .card-body .card-cat {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 30px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .related-card .card-body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
        .related-card .card-body h3 a { color: var(--text-dark); }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; margin-bottom: 0; }
        @media (max-width: 900px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 560px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-card .card-img { height: 160px; }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            padding: 70px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 108, 191, 0.82) 0%, rgba(26, 42, 58, 0.92) 100%);
        }
        .cta-section .container { position: relative; z-index: 2; text-align: center; }
        .cta-section h2 { font-size: 2.2rem; color: var(--text-white); font-weight: 800; margin-bottom: 14px; }
        .cta-section p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 640px; margin: 0 auto 28px; line-height: 1.7; }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 44px;
            border-radius: var(--radius-md);
            background: var(--secondary);
            color: #1a2a3a;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            transition: var(--transition);
            box-shadow: 0 6px 24px rgba(245, 166, 35, 0.4);
        }
        .cta-section .btn-cta i { font-size: 1rem; }
        .cta-section .btn-cta:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 10px 36px rgba(245, 166, 35, 0.5); color: #1a2a3a; }
        .cta-section .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: var(--radius-md);
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.5);
            margin-left: 14px;
            transition: var(--transition);
        }
        .cta-section .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); color: #fff; transform: translateY(-2px); }
        .cta-btns { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; }
        @media (max-width: 640px) {
            .cta-section h2 { font-size: 1.6rem; }
            .cta-section p { font-size: 0.95rem; }
            .cta-section .btn-cta, .cta-section .btn-outline { width: 100%; justify-content: center; margin-left: 0; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.75);
            padding: 50px 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; margin-top: 12px; color: rgba(255,255,255,0.6); max-width: 340px; }
        .footer-col h5 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 16px; letter-spacing: 0.3px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.65); font-size: 0.9rem; transition: var(--transition); display: inline-flex; align-items: center; gap: 6px; }
        .footer-col ul li a:hover { color: var(--secondary); transform: translateX(3px); }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-social { display: flex; gap: 10px; }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.6);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--secondary); color: #1a2a3a; transform: translateY(-2px); }
        @media (max-width: 868px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
        }

        /* ===== Misc Utilities ===== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Responsive Article ===== */
        @media (max-width: 768px) {
            .article-section { padding: 30px 0 40px; }
            .article-layout { gap: 24px; }
            .related-section { padding: 36px 0; }
            .related-section .section-title h2 { font-size: 1.6rem; }
        }

        /* Extra small */
        @media (max-width: 400px) {
            .article-banner h1 { font-size: 1.3rem; }
            .article-body { padding: 20px 14px; }
            .article-body .cms-content h2 { font-size: 1.25rem; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2c5a8c;
            --primary-dark: #0e1f32;
            --accent: #4a9eff;
            --accent-hover: #2d7edb;
            --accent-light: #e8f2ff;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-light: #f0f3f8;
            --bg-dark: #0e1f32;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a5e;
            --text-muted: #7a7a8e;
            --text-white: #f0f4fa;
            --border: #e2e7ee;
            --border-light: #eef1f6;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --transition: all 0.25s ease;
            --font-base: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --header-height: 76px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 600;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 12px;
        }
        .logo-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            transition: var(--transition);
        }
        .logo-brand i {
            font-size: 1.5rem;
            color: var(--accent);
        }
        .logo-brand:hover {
            color: var(--primary-light);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-light);
        }
        .nav-cards {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }
        .nav-card-item {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-md);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-card-item i {
            font-size: 0.95rem;
        }
        .nav-card-item:hover {
            background: var(--accent-light);
            color: var(--accent);
            border-color: var(--accent);
        }
        .nav-card-item.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .nav-card-item.active:hover {
            background: var(--primary-light);
            color: #fff;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 26px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 0.92rem;
            border: none;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .nav-cta i {
            font-size: 0.85rem;
        }
        @media (max-width: 900px) {
            .nav-cards {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px 20px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                gap: 8px;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                z-index: 999;
            }
            .nav-cards.open {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .nav-card-item {
                width: 100%;
                justify-content: center;
                padding: 12px;
            }
            .nav-cta {
                width: 100%;
                justify-content: center;
                margin-top: 6px;
            }
        }
        @media (min-width: 901px) {
            .nav-toggle {
                display: none !important;
            }
            .nav-cards {
                display: flex !important;
                flex-direction: row;
                position: static;
                box-shadow: none;
                padding: 0;
                background: transparent;
                border: none;
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-blend-mode: overlay;
            padding: 80px 0 70px;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 31, 50, 0.82) 0%, rgba(26, 58, 92, 0.65) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            padding: 0 20px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 30px;
            background: rgba(74, 158, 255, 0.2);
            color: #a3d0ff;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 1px;
            border: 1px solid rgba(74, 158, 255, 0.25);
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: 3rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 18px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }
        .hero-title span {
            color: var(--accent);
        }
        .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(74, 158, 255, 0.35);
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-md);
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.5);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: 420px;
                padding: 60px 0 50px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 12px 26px;
                font-size: 0.92rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.65rem;
            }
            .hero-sub {
                font-size: 0.92rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 54px;
        }
        .section-header h2 {
            font-size: 2.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 14px auto 20px;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-header p {
                font-size: 0.95rem;
            }
        }

        /* ===== Overview ===== */
        .overview-grid {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        .overview-image {
            flex: 0 0 44%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .overview-image img {
            width: 100%;
            display: block;
            transition: var(--transition);
        }
        .overview-image img:hover {
            transform: scale(1.02);
        }
        .overview-text {
            flex: 1;
        }
        .overview-text h3 {
            font-size: 1.6rem;
            margin-bottom: 16px;
            color: var(--primary);
        }
        .overview-text p {
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .overview-stats {
            display: flex;
            gap: 30px;
            margin-top: 24px;
        }
        .stat-item {
            text-align: center;
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        @media (max-width: 860px) {
            .overview-grid {
                flex-direction: column;
                gap: 30px;
            }
            .overview-image {
                flex: none;
                width: 100%;
                max-width: 540px;
            }
            .overview-text h3 {
                font-size: 1.3rem;
            }
            .overview-stats {
                flex-wrap: wrap;
                gap: 20px;
            }
        }

        /* ===== Features / Cards Grid ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 26px 30px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: var(--accent-light);
            color: var(--accent);
            font-size: 1.6rem;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--accent);
            color: #fff;
        }
        .feature-card h4 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 600px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 24px 18px;
            }
        }

        /* ===== Steps / Process ===== */
        .steps-wrapper {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: var(--border);
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .step-number {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 1.3rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 3px solid var(--accent);
            transition: var(--transition);
        }
        .step-item:hover .step-number {
            background: var(--accent);
            color: #fff;
        }
        .step-item h5 {
            font-size: 1rem;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        @media (max-width: 860px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .steps-grid::before {
                display: none;
            }
            .steps-wrapper {
                padding: 30px 20px;
            }
        }
        @media (max-width: 480px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Scenarios ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 28px 20px 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .scenario-card i {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 14px;
            display: block;
        }
        .scenario-card h5 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .scenario-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        @media (max-width: 860px) {
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-primary);
            cursor: pointer;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--bg-light);
        }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }
        @media (max-width: 600px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(14, 31, 50, 0.78);
            z-index: 1;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .cta-content h2 {
            font-size: 2.2rem;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 30px;
            line-height: 1.7;
        }
        .cta-content .btn-primary {
            font-size: 1.05rem;
            padding: 16px 40px;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
            .cta-content p {
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-top: 12px;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-col h5 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            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, 0.45);
        }
        .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-social a {
            color: rgba(255, 255, 255, 0.45);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            color: var(--accent);
        }
        @media (max-width: 860px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Foundation Overrides ===== */
        .grid-container {
            max-width: var(--container-max);
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Back to Top ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            font-size: 1.2rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            z-index: 900;
            display: none;
            align-items: center;
            justify-content: center;
        }
        .back-to-top.visible {
            display: flex;
        }
        .back-to-top:hover {
            background: var(--accent);
            transform: translateY(-3px);
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 12px;
        }
        .mt-2 {
            margin-top: 24px;
        }
        .mb-1 {
            margin-bottom: 12px;
        }
        .mb-2 {
            margin-bottom: 24px;
        }
        .bg-light {
            background: var(--bg-light);
        }
        .bg-white {
            background: var(--bg-white);
        }
        .rounded-lg {
            border-radius: var(--radius-lg);
        }
        .shadow-sm {
            box-shadow: var(--shadow-sm);
        }