/* roulang page: index */
:root {
            --primary: #1a3a6b;
            --primary-light: #2a5a9b;
            --primary-dark: #0f2440;
            --secondary: #f5a623;
            --secondary-hover: #d48f1a;
            --accent: #e8731a;
            --bg-light: #f8f9fa;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --border-color: #e8e8f0;
            --border-radius: 12px;
            --border-radius-sm: 8px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 58, 107, 0.08);
            --shadow-md: 0 6px 24px rgba(26, 58, 107, 0.12);
            --shadow-lg: 0 16px 48px rgba(26, 58, 107, 0.16);
            --shadow-xl: 0 24px 64px rgba(26, 58, 107, 0.20);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.7;
            font-size: 1rem;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
            text-decoration: none;
        }
        a:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1050;
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(255, 255, 255, 0.98);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }
        .nav-right {
            justify-content: flex-end;
        }

        .nav-link-custom {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--border-radius-sm);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-link-custom:hover {
            color: var(--primary);
            background: rgba(26, 58, 107, 0.06);
        }
        .nav-link-custom.active {
            color: var(--primary);
            background: rgba(26, 58, 107, 0.08);
            font-weight: 600;
        }
        .nav-link-custom.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .nav-link-custom i {
            font-size: 0.85rem;
            opacity: 0.7;
        }

        .logo-center {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin: 0 12px;
        }
        .logo-text {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--secondary);
            -webkit-text-fill-color: var(--secondary);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 8px;
            cursor: pointer;
            border-radius: var(--border-radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(26, 58, 107, 0.06);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            padding: calc(var(--nav-height) + 40px) 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
            animation: heroParallax 20s ease-in-out infinite alternate;
        }
        @keyframes heroParallax {
            0% {
                transform: scale(1) translate(0, 0);
            }
            100% {
                transform: scale(1.05) translate(-10px, -10px);
            }
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(245, 166, 35, 0.10) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(232, 115, 26, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 8px 20px;
            border-radius: 60px;
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 28px;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-badge i {
            color: var(--secondary);
            font-size: 0.75rem;
        }
        .hero-title {
            font-size: 3.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 20px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.20);
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-custom-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border: none;
            border-radius: 60px;
            box-shadow: 0 8px 32px rgba(245, 166, 35, 0.35);
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-custom-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(245, 166, 35, 0.45);
            color: #fff;
            background: linear-gradient(135deg, var(--secondary-hover), var(--accent));
        }
        .btn-custom-primary:active {
            transform: translateY(-1px);
        }
        .btn-custom-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.30);
            border-radius: 60px;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-custom-outline:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.50);
            color: #fff;
            transform: translateY(-3px);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 52px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat-number .num-suffix {
            font-size: 1.4rem;
            color: var(--secondary);
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.60);
            margin-top: 4px;
            letter-spacing: 0.5px;
        }

        /* ===== Section General ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-padding-sm {
            padding: 56px 0;
        }
        .section-title-wrap {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.80rem;
            font-weight: 600;
            color: var(--secondary);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            background: rgba(245, 166, 35, 0.10);
            padding: 4px 16px;
            border-radius: 60px;
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            margin-bottom: 14px;
            line-height: 1.25;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        .bg-white {
            background: #ffffff;
        }
        .bg-light-custom {
            background: var(--bg-light);
        }
        .bg-dark-custom {
            background: var(--bg-dark);
            color: #fff;
        }
        .bg-dark-custom .section-title {
            color: #fff;
        }
        .bg-dark-custom .section-subtitle {
            color: rgba(255, 255, 255, 0.70);
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 36px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, rgba(26, 58, 107, 0.06), rgba(245, 166, 35, 0.08));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            transform: scale(1.05);
        }
        .feature-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .feature-desc {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== Category Entry ===== */
        .category-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .category-visual {
            position: relative;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            min-height: 320px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .category-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.5;
            mix-blend-mode: overlay;
        }
        .category-visual-overlay {
            position: absolute;
            inset: 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 32px;
            text-align: center;
            color: #fff;
        }
        .category-visual-overlay h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-visual-overlay p {
            font-size: 0.95rem;
            opacity: 0.85;
            max-width: 320px;
        }
        .category-info {
            padding: 12px 0;
        }
        .category-info h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .category-info p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 24px;
        }
        .tag-item {
            display: inline-flex;
            padding: 6px 16px;
            background: rgba(26, 58, 107, 0.06);
            border-radius: 60px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .tag-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== CMS / News List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .news-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .news-card-body {
            padding: 24px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .news-card-meta .category-badge {
            display: inline-flex;
            padding: 2px 12px;
            background: rgba(245, 166, 35, 0.12);
            color: var(--secondary);
            border-radius: 60px;
            font-weight: 600;
            font-size: 0.72rem;
        }
        .news-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
            margin-bottom: 10px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-title a {
            color: inherit;
        }
        .news-card-title a:hover {
            color: var(--primary);
        }
        .news-card-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }
        .news-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-color);
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .news-card-footer a {
            color: var(--primary);
            font-weight: 500;
            font-size: 0.85rem;
        }
        .news-card-footer a:hover {
            color: var(--secondary);
        }

        .empty-news {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
            font-size: 1.05rem;
            background: var(--bg-card);
            border-radius: var(--border-radius);
            border: 1px dashed var(--border-color);
        }

        /* ===== Stats / Data ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 28px;
            text-align: center;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 36px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-number .stat-unit {
            font-size: 1.4rem;
            color: var(--secondary);
            font-weight: 600;
        }
        .stat-label {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-top: 6px;
            font-weight: 500;
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .process-step {
            text-align: center;
            position: relative;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .process-step::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.30);
        }
        .process-icon {
            font-size: 2rem;
            color: var(--primary);
            margin: 8px 0 16px;
        }
        .process-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .process-desc {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--border-radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(26, 58, 107, 0.15);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
            background: rgba(26, 58, 107, 0.02);
        }
        .faq-question .faq-toggle {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 20px;
        }
        .cta-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            background: #fff;
            border: none;
            border-radius: 60px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-cta-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.20);
            color: var(--primary);
            background: #fff;
        }
        .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.35);
            border-radius: 60px;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-cta-outline:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.60);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.70);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-text {
            font-size: 1.4rem;
            display: inline-block;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.90rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
            transform: translateX(4px);
        }
        .footer-bottom {
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.40);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.50);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== Mobile Overlay ===== */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.40);
            backdrop-filter: blur(4px);
            z-index: 1040;
        }
        .mobile-nav-overlay.show {
            display: block;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-showcase {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .category-visual {
                min-height: 240px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .logo-center {
                margin: 0;
            }
            .logo-text {
                font-size: 1.3rem;
            }

            .header-inner {
                padding: 0 16px;
            }

            .mobile-nav-open .nav-left,
            .mobile-nav-open .nav-right {
                display: flex;
                flex-direction: column;
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                padding: 16px 20px 24px;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border-color);
                z-index: 1050;
                gap: 4px;
            }
            .mobile-nav-open .nav-left {
                top: var(--nav-height);
            }
            .mobile-nav-open .nav-right {
                top: calc(var(--nav-height) + 160px);
            }
            .mobile-nav-open .nav-link-custom {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
                border-radius: var(--border-radius-sm);
            }
            .mobile-nav-open .nav-link-custom.active::after {
                display: none;
            }
            .mobile-nav-open .nav-link-custom.active {
                background: rgba(26, 58, 107, 0.08);
            }

            .hero-section {
                min-height: 70vh;
                padding-top: calc(var(--nav-height) + 32px);
                padding-bottom: 40px;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                padding-top: 28px;
                margin-top: 36px;
            }
            .hero-stat-number {
                font-size: 1.8rem;
            }

            .section-padding {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }

            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 18px;
            }

            .news-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .news-card-body {
                padding: 18px 16px;
            }
            .news-card-img {
                height: 150px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-number {
                font-size: 2rem;
            }

            .process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .cta-title {
                font-size: 1.6rem;
            }
            .cta-desc {
                font-size: 0.95rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-desc {
                font-size: 0.92rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-custom-primary,
            .btn-custom-outline {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
                font-size: 0.95rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 24px 12px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }

            .section-title {
                font-size: 1.5rem;
            }
            .section-padding {
                padding: 40px 0;
            }

            .category-visual-overlay h3 {
                font-size: 1.3rem;
            }

            .cta-title {
                font-size: 1.3rem;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-cta-primary,
            .btn-cta-outline {
                width: 100%;
                justify-content: center;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }

            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .container {
                padding: 0 14px;
            }
        }

        @media (max-width: 380px) {
            .logo-text {
                font-size: 1.1rem;
            }
            .hero-title {
                font-size: 1.4rem;
            }
            .stat-number {
                font-size: 1.6rem;
            }
        }

        /* ===== Utility ===== */
        .text-secondary-custom {
            color: var(--secondary) !important;
        }
        .text-primary-custom {
            color: var(--primary) !important;
        }
        .mb-0 {
            margin-bottom: 0 !important;
        }
        .mt-1 {
            margin-top: 8px !important;
        }
        .gap-1 {
            gap: 8px !important;
        }
        .gap-2 {
            gap: 16px !important;
        }

        .fade-in {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: category1 */
:root {
            --primary: #6C3FAA;
            --primary-dark: #522A8A;
            --primary-light: #8B5FCF;
            --primary-gradient: linear-gradient(135deg, #6C3FAA 0%, #9B6FE8 100%);
            --secondary: #F5A623;
            --secondary-dark: #D4891A;
            --accent: #FF6B6B;
            --bg-dark: #0F0A1E;
            --bg-card: #1A122F;
            --bg-body: #0D0820;
            --bg-section: #120B26;
            --text-light: #F0EAFF;
            --text-muted: #A89CC8;
            --text-body: #D8D0EC;
            --border-color: rgba(108, 63, 170, 0.25);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.40);
            --shadow-glow: 0 0 40px rgba(108, 63, 170, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
            padding: 0;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(15, 10, 30, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
            height: 72px;
        }
        .site-header.scrolled {
            background: rgba(15, 10, 30, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link-custom {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link-custom i {
            font-size: 0.85rem;
            opacity: 0.7;
        }
        .nav-link-custom:hover {
            color: var(--text-light);
            background: rgba(108, 63, 170, 0.15);
            border-color: rgba(108, 63, 170, 0.3);
            transform: translateY(-1px);
        }
        .nav-link-custom.active {
            color: #fff;
            background: var(--primary-gradient);
            border-color: transparent;
            box-shadow: 0 4px 20px rgba(108, 63, 170, 0.35);
        }
        .nav-link-custom.active:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 28px rgba(108, 63, 170, 0.45);
        }
        .logo-center {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }
        .logo-text {
            font-size: 1.55rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            transition: var(--transition);
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--secondary);
            -webkit-text-fill-color: var(--secondary);
        }
        .logo-text:hover {
            opacity: 0.85;
            transform: scale(1.02);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-light);
            font-size: 1.4rem;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            line-height: 1;
        }
        .nav-toggle:hover {
            background: rgba(108, 63, 170, 0.2);
            border-color: var(--primary-light);
        }

        /* Mobile nav panel */
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: rgba(15, 10, 30, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px 24px;
            z-index: 1049;
            flex-direction: column;
            gap: 10px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
            transform: translateY(-10px);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
        }
        .mobile-nav-panel.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav-panel .nav-link-custom {
            width: 100%;
            justify-content: center;
            padding: 12px 18px;
            font-size: 1rem;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center/cover no-repeat;
            opacity: 0.20;
            z-index: 0;
            filter: blur(2px) saturate(0.8);
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 10, 30, 0.90) 0%, rgba(15, 10, 30, 0.70) 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.2;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .page-banner h1 span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto 8px;
            line-height: 1.7;
        }
        .breadcrumb-custom {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 20px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .breadcrumb-custom a {
            color: var(--primary-light);
        }
        .breadcrumb-custom a:hover {
            color: var(--secondary);
        }
        .breadcrumb-custom span {
            color: var(--text-muted);
            opacity: 0.6;
        }
        .breadcrumb-custom .current {
            color: var(--secondary);
            font-weight: 500;
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: 80px 0;
            position: relative;
        }
        .section-block.bg-alt {
            background: var(--bg-section);
        }
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-title h2 i {
            color: var(--secondary);
            margin-right: 10px;
        }
        .section-title p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary-gradient);
            border-radius: 4px;
            margin: 14px auto 0;
        }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card-custom:hover {
            transform: translateY(-6px);
            border-color: rgba(108, 63, 170, 0.35);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), var(--shadow-glow);
        }
        .card-custom .card-icon {
            font-size: 2.4rem;
            color: var(--secondary);
            margin-bottom: 16px;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(245, 166, 35, 0.10);
            border-radius: var(--radius-sm);
        }
        .card-custom h4 {
            font-size: 1.2rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
        }
        .card-custom p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.65;
            flex: 1;
        }
        .card-custom .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(108, 63, 170, 0.20);
            color: var(--primary-light);
            margin-top: 14px;
            align-self: flex-start;
        }

        /* ===== Guide Steps ===== */
        .step-card {
            display: flex;
            gap: 24px;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: var(--transition);
            margin-bottom: 20px;
            align-items: flex-start;
        }
        .step-card:hover {
            border-color: rgba(108, 63, 170, 0.30);
            box-shadow: var(--shadow-glow);
            transform: translateX(6px);
        }
        .step-num {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            box-shadow: 0 4px 16px rgba(108, 63, 170, 0.30);
        }
        .step-content {
            flex: 1;
        }
        .step-content h4 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
        }
        .step-content p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 4px;
        }
        .step-content .step-tip {
            display: inline-block;
            font-size: 0.8rem;
            color: var(--secondary);
            background: rgba(245, 166, 35, 0.10);
            padding: 2px 12px;
            border-radius: 50px;
            margin-top: 6px;
        }

        /* ===== Feature Grid ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }
        .feature-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 24px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-4px);
            border-color: rgba(108, 63, 170, 0.30);
            box-shadow: var(--shadow-glow);
        }
        .feature-item i {
            font-size: 2.2rem;
            color: var(--secondary);
            margin-bottom: 14px;
            display: block;
        }
        .feature-item h5 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
        }
        .feature-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(108, 63, 170, 0.25);
        }
        .faq-question {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 500;
            color: #fff;
            font-size: 1.0rem;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question:hover {
            background: rgba(108, 63, 170, 0.08);
        }
        .faq-question i {
            color: var(--secondary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center/cover no-repeat;
            opacity: 0.10;
            z-index: 0;
            filter: blur(2px);
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 580px;
            margin: 0 auto 28px;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: 50px;
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            background: var(--primary-gradient);
            border: none;
            box-shadow: 0 8px 32px rgba(108, 63, 170, 0.35);
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 44px rgba(108, 63, 170, 0.50);
            color: #fff;
        }
        .btn-cta:active {
            transform: translateY(-1px);
        }
        .btn-cta i {
            font-size: 1.1rem;
        }
        .btn-outline-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1.0rem;
            font-weight: 500;
            color: var(--text-light);
            background: transparent;
            border: 2px solid rgba(108, 63, 170, 0.40);
            transition: var(--transition);
            cursor: pointer;
            margin-left: 12px;
        }
        .btn-outline-cta:hover {
            border-color: var(--primary-light);
            background: rgba(108, 63, 170, 0.10);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-light);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-text {
            font-size: 1.6rem;
            display: inline-block;
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 1.0rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .footer-col ul li a i {
            font-size: 0.7rem;
            color: var(--primary-light);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
        }
        .footer-col ul li a:hover i {
            color: var(--secondary);
            transform: translateX(4px);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 28px;
            border-top: 1px solid var(--border-light);
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }
        .footer-bottom span a {
            margin: 0 4px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-banner h1 {
                font-size: 2.3rem;
            }
            .section-title h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .logo-center {
                position: relative;
                left: auto;
                transform: none;
            }
            .header-inner {
                justify-content: space-between;
            }
            .mobile-nav-panel {
                display: flex;
            }
            .page-banner {
                padding: 120px 0 60px;
                min-height: 280px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
            .section-block {
                padding: 56px 0;
            }
            .section-title {
                margin-bottom: 36px;
            }
            .section-title h2 {
                font-size: 1.5rem;
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-card {
                flex-direction: column;
                gap: 14px;
                padding: 20px 18px;
            }
            .step-num {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .btn-outline-cta {
                margin-left: 0;
                margin-top: 12px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .card-custom {
                padding: 20px 16px;
            }
            .faq-question {
                font-size: 0.92rem;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }
            .btn-cta {
                padding: 14px 28px;
                font-size: 0.95rem;
                width: 100%;
                justify-content: center;
            }
            .btn-outline-cta {
                width: 100%;
                justify-content: center;
                margin-top: 10px;
                margin-left: 0;
            }
            .cta-section .btn-wrap {
                display: flex;
                flex-direction: column;
                align-items: center;
            }
            .logo-text {
                font-size: 1.25rem;
            }
        }

        /* ===== Utility ===== */
        .text-gradient {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }
        .gap-2 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-light);
        }

        /* Selection */
        ::selection {
            background: var(--primary);
            color: #fff;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e62e2e;
            --primary-dark: #c41e1e;
            --primary-light: #f04c4c;
            --secondary: #ff6b35;
            --accent: #f7c948;
            --bg-dark: #0f0f1a;
            --bg-darker: #0a0a14;
            --bg-card: #16162a;
            --bg-card-hover: #1e1e3a;
            --bg-body: #0d0d1a;
            --text-light: #ffffff;
            --text-muted: #b0b0c8;
            --text-dim: #7a7a9a;
            --border-color: #2a2a4a;
            --border-light: #3a3a5a;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 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-base);
            background: var(--bg-body);
            color: var(--text-light);
            line-height: 1.7;
            font-size: 16px;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
        }

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

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 10, 20, 0.96);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 68px;
            position: relative;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
        }
        .nav-right {
            justify-content: flex-end;
        }
        .nav-link-custom {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 40px;
            color: var(--text-muted);
            font-size: 0.92rem;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .nav-link-custom i {
            font-size: 0.85rem;
            opacity: 0.7;
        }
        .nav-link-custom:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-light);
            transform: translateY(-1px);
        }
        .nav-link-custom:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .nav-link-custom.active {
            color: var(--text-light);
            background: rgba(230, 46, 46, 0.15);
            border-color: rgba(230, 46, 46, 0.3);
        }
        .nav-link-custom.active i {
            color: var(--primary);
            opacity: 1;
        }
        .logo-center {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            padding: 0 20px;
        }
        .logo-text {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: -0.5px;
            transition: var(--transition);
            text-decoration: none;
        }
        .logo-text span {
            color: var(--primary);
        }
        .logo-text:hover {
            color: var(--primary-light);
            text-decoration: none;
        }
        .logo-text:hover span {
            color: var(--accent);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.4rem;
            padding: 8px 12px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== Mobile Menu ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            background: rgba(10, 10, 20, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px 24px;
            z-index: 999;
            flex-direction: column;
            gap: 8px;
            transform: translateY(-12px);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
        }
        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
            display: flex;
        }
        .mobile-menu .nav-link-custom {
            padding: 12px 16px;
            font-size: 1rem;
            border-radius: var(--radius-sm);
        }

        /* ===== Page Header ===== */
        .page-header {
            padding: 120px 0 48px;
            position: relative;
            background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-card) 100%);
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }
        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .page-header .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-dim);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .breadcrumb-nav a:hover {
            color: var(--primary-light);
        }
        .breadcrumb-nav span {
            color: var(--text-dim);
        }
        .breadcrumb-nav .separator {
            color: var(--border-light);
            font-size: 0.7rem;
        }
        .article-meta-header {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            margin-bottom: 16px;
        }
        .article-meta-header .badge-category {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 40px;
            background: rgba(230, 46, 46, 0.15);
            color: var(--primary-light);
            font-size: 0.8rem;
            font-weight: 600;
            border: 1px solid rgba(230, 46, 46, 0.25);
        }
        .article-meta-header .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--text-dim);
            font-size: 0.85rem;
        }
        .article-meta-header .meta-item i {
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .page-title {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-light);
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }
        .page-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.6;
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 56px 0;
        }
        .article-body {
            max-width: 860px;
            margin: 0 auto;
        }
        .article-cover {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 36px;
            box-shadow: var(--shadow-md);
            aspect-ratio: 16 / 9;
            background: var(--bg-card);
            position: relative;
        }
        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .article-cover:hover img {
            transform: scale(1.02);
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-light);
        }
        .article-content p {
            margin-bottom: 1.4em;
        }
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            font-weight: 700;
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            color: var(--text-light);
        }
        .article-content h2 {
            font-size: 1.6rem;
        }
        .article-content h3 {
            font-size: 1.3rem;
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.2em 0;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }
        .article-content li {
            margin-bottom: 0.4em;
        }
        .article-content ul li {
            list-style: disc;
        }
        .article-content ol li {
            list-style: decimal;
        }
        .article-content a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--accent);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 12px 20px;
            margin: 1.4em 0;
            background: rgba(230, 46, 46, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
        }
        .article-content code {
            background: rgba(255, 255, 255, 0.06);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--accent);
        }
        .article-content pre {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 20px;
            overflow-x: auto;
            margin: 1.2em 0;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-tags .tag-item {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-muted);
            font-size: 0.8rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-tags .tag-item:hover {
            background: rgba(230, 46, 46, 0.1);
            border-color: rgba(230, 46, 46, 0.3);
            color: var(--primary-light);
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }
        .not-found-box i {
            font-size: 3rem;
            color: var(--text-dim);
            margin-bottom: 16px;
        }
        .not-found-box h2 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 56px 0;
            background: var(--bg-darker);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-section .section-title i {
            color: var(--primary);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: var(--transition);
        }
        .related-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .related-card .card-category {
            font-size: 0.75rem;
            color: var(--primary-light);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .related-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .related-card h3 a {
            color: var(--text-light);
            transition: var(--transition);
        }
        .related-card h3 a:hover {
            color: var(--primary-light);
        }
        .related-card .card-excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            font-size: 0.78rem;
            color: var(--text-dim);
            margin-top: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-meta i {
            font-size: 0.7rem;
            margin-right: 4px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 64px 0;
            background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-dark) 100%);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-box {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-box p {
            color: var(--text-muted);
            font-size: 1.05rem;
            margin-bottom: 28px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }

        /* ===== Buttons ===== */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
            background: transparent;
            color: var(--text-light);
        }
        .btn-custom-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(230, 46, 46, 0.3);
        }
        .btn-custom-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 46, 46, 0.4);
        }
        .btn-custom-outline {
            border: 1px solid var(--border-light);
            color: var(--text-muted);
        }
        .btn-custom-outline:hover {
            border-color: var(--primary-light);
            color: var(--primary-light);
            background: rgba(230, 46, 46, 0.06);
            transform: translateY(-2px);
        }
        .btn-custom-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-custom:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 56px 0;
            background: var(--bg-body);
        }
        .faq-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 32px;
            text-align: center;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 0;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-light);
            transition: var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 12px;
        }
        .faq-question:hover {
            color: var(--primary-light);
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .faq-question .faq-toggle {
            font-size: 0.85rem;
            color: var(--text-dim);
            transition: var(--transition);
        }
        .faq-item.open .faq-toggle {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-color);
        }
        .footer-brand .logo-text {
            font-size: 1.5rem;
            display: inline-block;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 320px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a i {
            font-size: 0.65rem;
            color: var(--text-dim);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }
        .footer-col ul li a:hover i {
            color: var(--primary);
            transform: translateX(2px);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-dim);
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        .footer-bottom span a {
            margin: 0 4px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .page-title {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                padding: 0 16px;
                height: 60px;
            }
            .nav-left,
            .nav-right {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .logo-center {
                padding: 0 8px;
            }
            .logo-text {
                font-size: 1.3rem;
            }
            .page-header {
                padding: 100px 0 32px;
            }
            .page-title {
                font-size: 1.6rem;
            }
            .page-subtitle {
                font-size: 0.95rem;
            }
            .article-meta-header {
                gap: 10px 16px;
            }
            .article-content {
                font-size: 0.98rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-box h2 {
                font-size: 1.4rem;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 14px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-title {
                font-size: 1.3rem;
            }
            .article-meta-header .meta-item {
                font-size: 0.78rem;
            }
            .breadcrumb-nav {
                font-size: 0.78rem;
            }
            .btn-custom {
                padding: 10px 20px;
                font-size: 0.88rem;
            }
            .related-card {
                padding: 16px;
            }
            .faq-question {
                padding: 12px 14px;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 14px 12px;
                font-size: 0.88rem;
            }
            .related-section .section-title {
                font-size: 1.3rem;
            }
            .faq-section .section-title {
                font-size: 1.3rem;
            }
        }

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