/* roulang page: index */
:root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --secondary: #d4896a;
            --accent: #f0c8a0;
            --bg-warm: #f9f7f4;
            --text-dark: #2d2d2d;
            --text-muted: #6b7280;
            --border-light: #e5e0db;
            --radius: 12px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --transition: all 0.25s ease;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background: var(--bg-warm);
            color: var(--text-dark);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .wave-divider {
            position: relative;
            height: 60px;
            background: transparent;
            overflow: hidden;
        }
        .wave-divider svg {
            position: absolute;
            bottom: 0;
            width: 100%;
            height: 60px;
            fill: var(--bg-warm);
        }
        .card {
            background: #ffffff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 500;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(26,58,92,0.25);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            box-shadow: 0 4px 16px rgba(26,58,92,0.35);
            transform: translateY(-1px);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: transparent;
            color: var(--primary);
            border-radius: 50px;
            font-weight: 500;
            font-size: 1rem;
            border: 2px solid var(--primary);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--accent);
            color: var(--primary);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 20px 0;
        }
        .faq-question {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            color: var(--text-muted);
            margin-top: 10px;
            line-height: 1.8;
        }
        .footer-link {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-link:hover {
            color: var(--primary);
        }
        .nav-link {
            position: relative;
            padding: 6px 0;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .nav-link:hover { color: var(--primary); }
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .search-input {
            padding: 8px 16px 8px 40px;
            border-radius: 50px;
            border: 1px solid var(--border-light);
            background: #fff;
            font-size: 0.95rem;
            width: 200px;
            transition: var(--transition);
            outline: none;
        }
        .search-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26,58,92,0.10);
            width: 240px;
        }
        .search-wrapper { position: relative; }
        .search-wrapper i {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .hero-wave {
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 80px;
            fill: var(--bg-warm);
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            .section-title { font-size: 1.6rem; }
            .nav-desktop { display: none; }
            .mobile-menu-btn { display: block; }
            .search-input { width: 140px; }
            .search-input:focus { width: 160px; }
            .hero-title { font-size: 2rem; }
        }
        @media (min-width: 769px) {
            .mobile-menu-btn { display: none; }
            .mobile-nav { display: none !important; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 1.6rem; }
            .section-title { font-size: 1.3rem; }
            .btn-primary, .btn-secondary { padding: 10px 20px; font-size: 0.9rem; }
            .search-input { width: 110px; font-size: 0.85rem; }
            .search-input:focus { width: 130px; }
        }
        .stat-number { font-size: 2.5rem; font-weight: 700; color: var(--primary); line-height: 1.2; }
        .stat-label { font-size: 0.95rem; color: var(--text-muted); }
        .step-card { text-align: center; padding: 32px 20px; }
        .step-number {
            width: 48px; height: 48px; border-radius: 50%;
            background: var(--accent); color: var(--primary);
            font-weight: 700; font-size: 1.2rem;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 16px;
        }
        .news-card { padding: 24px; }
        .news-card .meta { font-size: 0.85rem; color: var(--text-muted); }
        .news-card .title { font-size: 1.1rem; font-weight: 600; margin: 8px 0; }
        .news-card .excerpt { color: var(--text-muted); font-size: 0.95rem; }
        .empty-state { padding: 40px 20px; text-align: center; color: var(--text-muted); }

/* roulang page: article */
:root {
            --primary: #1a56db;
            --primary-dark: #1e40af;
            --secondary: #f59e0b;
            --accent: #10b981;
            --darkbg: #0f172a;
            --cardbg: #ffffff;
            --softbg: #f8fafc;
            --border-light: #e2e8f0;
            --text-main: #1e293b;
            --text-soft: #64748b;
            --radius: 12px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            color: var(--text-main);
            background: var(--softbg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            transition: var(--transition);
        }

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

        .backdrop-blur-sm {
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
            padding: 6px 0;
            transition: var(--transition);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            width: 100%;
        }

        .search-wrapper {
            display: flex;
            align-items: center;
            background: var(--softbg);
            border: 1px solid var(--border-light);
            border-radius: 9999px;
            padding: 6px 16px;
            transition: var(--transition);
        }
        .search-wrapper:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.15);
        }
        .search-wrapper i {
            color: var(--text-soft);
            font-size: 0.9rem;
            margin-right: 8px;
        }
        .search-input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            color: var(--text-main);
            min-width: 160px;
        }
        .search-input::placeholder {
            color: var(--text-soft);
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 9999px;
            padding: 10px 24px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(26, 86, 219, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--border-light);
            border-radius: 9999px;
            padding: 10px 24px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(26, 86, 219, 0.05);
            transform: translateY(-2px);
        }

        .article-card {
            background: var(--cardbg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .article-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .tag-badge {
            display: inline-block;
            background: rgba(26, 86, 219, 0.08);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 9999px;
            transition: var(--transition);
        }
        .tag-badge:hover {
            background: var(--primary);
            color: #fff;
        }

        .category-tag {
            display: inline-block;
            background: rgba(245, 158, 11, 0.12);
            color: #b45309;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 9999px;
        }

        .footer-link {
            transition: var(--transition);
        }
        .footer-link:hover {
            color: #fff !important;
            padding-left: 4px;
        }

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--text-main);
            line-height: 1.3;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 1.6rem;
            margin-bottom: 0.75rem;
            color: var(--text-main);
        }
        .article-body p {
            margin-bottom: 1.2rem;
            color: #334155;
            font-size: 1.05rem;
            line-height: 1.8;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.2rem;
            padding-left: 1.8rem;
            color: #334155;
        }
        .article-body li {
            margin-bottom: 0.5rem;
            font-size: 1.05rem;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: rgba(26, 86, 219, 0.04);
            border-radius: 0 var(--radius) var(--radius) 0;
            color: #334155;
            font-style: italic;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--primary-dark);
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: 1.2rem 1.5rem;
            border-radius: var(--radius);
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 1.5rem 0;
        }
        .article-body code {
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            background: rgba(0,0,0,0.05);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
        }
        .article-body pre code {
            background: transparent;
            padding: 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-soft);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-soft);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #94a3b8;
        }

        .mobile-nav a {
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            padding-left: 8px;
            color: var(--primary);
        }

        .related-card {
            background: var(--cardbg);
            border-radius: var(--radius);
            padding: 1.2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        @media (max-width: 1024px) {
            .nav-desktop {
                display: none;
            }
            .mobile-menu-btn {
                display: block !important;
            }
        }

        @media (min-width: 1025px) {
            .mobile-menu-btn {
                display: none !important;
            }
            .mobile-nav {
                display: none !important;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .article-body h2 {
                font-size: 1.35rem;
            }
            .article-body p {
                font-size: 1rem;
            }
            .search-wrapper.hidden {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .article-body h2 {
                font-size: 1.2rem;
            }
            .article-body p {
                font-size: 0.95rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f3b5e;
            --primary-light: #1a5276;
            --secondary: #f39c12;
            --secondary-light: #f1c40f;
            --accent: #e67e22;
            --bg-light: #f8fafc;
            --bg-dark: #0b1a2a;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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;
            -moz-osx-font-smoothing: grayscale;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .nav-link {
            position: relative;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-dark);
            padding: 0.25rem 0;
            transition: color var(--transition);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
            transition: width var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link.active::after {
            width: 100%;
            background: var(--secondary);
        }

        .search-wrapper {
            display: flex;
            align-items: center;
            gap: 8px;
            background: #f1f5f9;
            border-radius: 50px;
            padding: 6px 16px;
            border: 1px solid transparent;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .search-wrapper:focus-within {
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.15);
        }

        .search-wrapper i {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .search-input {
            background: transparent;
            border: none;
            padding: 4px 0;
            font-size: 0.9rem;
            color: var(--text-dark);
            min-width: 140px;
        }

        .search-input::placeholder {
            color: var(--text-light);
        }

        .search-input:focus {
            outline: none;
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 50px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(15, 59, 94, 0.25);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-primary:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 50px;
            border: 2px solid var(--primary);
            transition: background var(--transition), color var(--transition), transform var(--transition);
            cursor: pointer;
        }

        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-secondary:active {
            transform: translateY(0);
        }

        .btn-secondary:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: transparent;
            color: var(--primary);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 50px;
            transition: background var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn-ghost:hover {
            background: rgba(15, 59, 94, 0.08);
        }

        /* ===== Cards ===== */
        .card {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            padding: 24px;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .card-lg {
            padding: 32px;
        }

        .card-sm {
            padding: 16px;
        }

        .card-image {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 16px;
        }

        .card-image img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .card:hover .card-image img {
            transform: scale(1.05);
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(15, 59, 94, 0.08);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            letter-spacing: 0.3px;
        }

        .badge-secondary {
            background: rgba(243, 156, 18, 0.15);
            color: #b7950b;
        }

        .badge-success {
            background: rgba(16, 185, 129, 0.12);
            color: #047857;
        }

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

        .section-sm {
            padding: 48px 0;
        }

        .section-lg {
            padding: 120px 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-lg {
                padding: 64px 0;
            }
        }

        /* ===== Divider ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 12px 0 20px 0;
        }

        .divider-center {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Step / Timeline ===== */
        .step-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            position: relative;
        }

        .step-item:not(:last-child)::before {
            content: '';
            position: absolute;
            left: 20px;
            top: 60px;
            bottom: 0;
            width: 2px;
            background: var(--border-light);
        }

        .step-number {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            z-index: 1;
        }

        .step-content {
            flex: 1;
            padding-top: 4px;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 18px 0;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 4px 0;
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 1.1rem;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .faq-answer.open {
            max-height: 300px;
            padding-top: 12px;
        }

        /* ===== Stats ===== */
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        @media (max-width: 640px) {
            .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== Hero for category ===== */
        .hero-category {
            background: linear-gradient(135deg, #0b1a2a 0%, #1a3a5a 60%, #0f3b5e 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(243, 156, 18, 0.06);
            pointer-events: none;
        }

        .hero-category::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(243, 156, 18, 0.04);
            pointer-events: none;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
        }

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

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }

        /* ===== Footer link ===== */
        .footer-link {
            transition: color var(--transition);
        }

        .footer-link:hover {
            color: #fff !important;
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none;
        }

        .mobile-nav.open {
            display: block;
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none !important;
            }
            .search-wrapper.hidden-sm {
                display: none !important;
            }
            .mobile-menu-btn {
                display: block !important;
            }
        }

        @media (min-width: 769px) {
            .mobile-menu-btn {
                display: none !important;
            }
            .mobile-nav {
                display: none !important;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-medium);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* ===== Utility ===== */
        .text-balance {
            text-wrap: balance;
        }

        .shadow-card {
            box-shadow: var(--shadow-sm);
        }
        .shadow-card:hover {
            box-shadow: var(--shadow-md);
        }

        .transition-base {
            transition: var(--transition);
        }

        /* ===== CTA Section ===== */
        .cta-gradient {
            background: linear-gradient(135deg, var(--primary) 0%, #1a5276 100%);
        }

        /* ===== Responsive Grid helpers ===== */
        .grid-auto {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        @media (max-width: 640px) {
            .grid-auto {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Content list ===== */
        .content-list-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition);
        }

        .content-list-item:last-child {
            border-bottom: none;
        }

        .content-list-item:hover {
            background: rgba(15, 59, 94, 0.02);
        }

        .content-list-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(15, 59, 94, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1rem;
        }

        /* ===== Table of contents ===== */
        .toc-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        .toc-item:hover {
            background: rgba(15, 59, 94, 0.05);
            color: var(--primary);
        }

        .toc-item.active {
            background: rgba(15, 59, 94, 0.08);
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Tip box ===== */
        .tip-box {
            background: rgba(243, 156, 18, 0.06);
            border-left: 4px solid var(--secondary);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
        }

        .tip-box.warning {
            background: rgba(231, 76, 60, 0.06);
            border-left-color: #e74c3c;
        }

        .tip-box.success {
            background: rgba(16, 185, 129, 0.06);
            border-left-color: #10b981;
        }