/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0a1628;
            --primary-light: #132240;
            --primary-dark: #060e1a;
            --accent: #d4a843;
            --accent-light: #e8c86a;
            --accent-dark: #b8912e;
            --bg-white: #ffffff;
            --bg-light: #f6f8fb;
            --bg-dark: #0a1628;
            --text-dark: #1a1a2e;
            --text-body: #3d3d55;
            --text-light: #7a7a94;
            --text-white: #f0f0f5;
            --border: #e2e5ed;
            --border-light: #f0f2f7;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(10, 22, 40, 0.06);
            --shadow-md: 0 6px 24px rgba(10, 22, 40, 0.08);
            --shadow-lg: 0 16px 48px rgba(10, 22, 40, 0.12);
            --shadow-xl: 0 24px 64px rgba(10, 22, 40, 0.16);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-white);
        }

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

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

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

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            line-height: 1.3;
            font-weight: 700;
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

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

        /* ===== Utility ===== */
        .section-padding {
            padding: 100px 0;
        }

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

        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            color: var(--text-dark);
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            line-height: 1.7;
        }

        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section-header .section-subtitle {
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.75rem;
            }
            .section-subtitle {
                font-size: 1rem;
            }
            .section-header {
                margin-bottom: 40px;
            }
        }

        .text-accent {
            color: var(--accent);
        }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: rgba(212, 168, 67, 0.12);
            color: var(--accent-dark);
            border: 1px solid rgba(212, 168, 67, 0.2);
        }

        .badge-primary {
            background: rgba(10, 22, 40, 0.08);
            color: var(--primary);
            border-color: rgba(10, 22, 40, 0.12);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            cursor: pointer;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212, 168, 67, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(212, 168, 67, 0.2);
        }
        .btn-primary:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-outline:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.5);
            outline-offset: 2px;
        }

        .btn-dark {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-dark:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(10, 22, 40, 0.2);
        }
        .btn-dark:active {
            transform: translateY(0);
        }
        .btn-dark:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-dark);
            font-size: 1.1rem;
            font-weight: 900;
        }

        .logo span {
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-links a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-body);
            padding: 4px 0;
            position: relative;
            transition: color var(--transition);
        }

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

        .nav-links a:hover {
            color: var(--text-dark);
        }
        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            width: 100%;
            background: var(--accent);
        }

        .nav-cta {
            padding: 8px 20px !important;
            background: var(--accent) !important;
            color: var(--primary-dark) !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            border: none !important;
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-cta:hover {
            background: var(--accent-light) !important;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(212, 168, 67, 0.3);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 4px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 24px 32px;
                gap: 20px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: var(--shadow-lg);
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-links a {
                font-size: 1.05rem;
                padding: 8px 0;
            }

            .nav-cta {
                text-align: center;
                padding: 12px 20px !important;
                width: 100%;
            }
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--primary-dark);
            overflow: hidden;
            padding-top: var(--header-height);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
        }

        .hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.35;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(135deg,
                    rgba(10, 22, 40, 0.88) 0%,
                    rgba(10, 22, 40, 0.72) 50%,
                    rgba(10, 22, 40, 0.88) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 80px 0 100px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--accent);
            background: rgba(212, 168, 67, 0.12);
            border: 1px solid rgba(212, 168, 67, 0.2);
            margin-bottom: 28px;
            letter-spacing: 0.03em;
        }

        .hero-title {
            font-size: 4rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            color: var(--text-white);
            line-height: 1.1;
            margin-bottom: 24px;
            max-width: 800px;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 580px;
            line-height: 1.8;
            margin-bottom: 40px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: flex;
            gap: 48px;
            margin-top: 64px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .hero-stat-item h3 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
        }

        .hero-stat-item h3 span {
            color: var(--accent);
        }

        .hero-stat-item p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 4px;
        }

        @media (max-width: 1024px) {
            .hero-title {
                font-size: 3.2rem;
            }
        }

        @media (max-width: 768px) {
            .hero {
                min-height: auto;
            }
            .hero-content {
                padding: 60px 0 80px;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
                margin-top: 40px;
                padding-top: 28px;
            }
            .hero-stat-item h3 {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                justify-content: center;
            }
        }

        /* ===== About / Intro Section ===== */
        .intro-section {
            background: var(--bg-white);
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .intro-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .intro-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(212, 168, 67, 0.08), transparent 60%);
            pointer-events: none;
        }

        .intro-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(212, 168, 67, 0.1);
            border: 1px solid rgba(212, 168, 67, 0.15);
            margin-bottom: 20px;
        }

        .intro-text h2 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }

        .intro-text p {
            color: var(--text-light);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 28px;
        }

        .intro-feature-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            background: var(--bg-light);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-dark);
        }

        .intro-feature-item i {
            color: var(--accent);
            font-size: 1.1rem;
        }

        @media (max-width: 1024px) {
            .intro-grid {
                gap: 40px;
            }
            .intro-text h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-image img {
                height: 280px;
            }
            .intro-text h2 {
                font-size: 1.6rem;
            }
            .intro-features {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Categories / Services Section ===== */
        .categories-section {
            background: var(--bg-light);
        }

        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 36px 32px 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }

        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 168, 67, 0.2);
        }

        .category-icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: rgba(212, 168, 67, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--accent);
        }

        .category-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .category-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--accent-dark);
            font-size: 0.9rem;
            transition: gap var(--transition);
        }

        .category-card .card-link:hover {
            gap: 12px;
        }

        @media (max-width: 1024px) {
            .categories-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .category-card {
                padding: 28px 24px 32px;
            }
        }

        /* ===== News / Articles Section ===== */
        .news-section {
            background: var(--bg-white);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(212, 168, 67, 0.15);
        }

        .news-card-image {
            position: relative;
            height: 200px;
            overflow: hidden;
            background: var(--bg-light);
        }

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

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

        .news-card-category {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(10, 22, 40, 0.75);
            color: var(--text-white);
            backdrop-filter: blur(4px);
        }

        .news-card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }

        .news-card-meta i {
            margin-right: 4px;
        }

        .news-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-dark);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .news-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--accent-dark);
            transition: gap var(--transition);
            margin-top: auto;
        }

        .news-card-link:hover {
            gap: 12px;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            font-size: 1.05rem;
            background: var(--bg-light);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }

        .news-empty i {
            font-size: 2.4rem;
            color: var(--text-light);
            margin-bottom: 16px;
            opacity: 0.5;
        }

        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-card-image {
                height: 180px;
            }
        }

        /* ===== Stats Section ===== */
        .stats-section {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 1;
        }

        .stat-card {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(212, 168, 67, 0.2);
            transform: translateY(-4px);
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--text-white);
            letter-spacing: -0.03em;
            line-height: 1.2;
        }

        .stat-number span {
            color: var(--accent);
        }

        .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 8px;
            font-weight: 500;
        }

        .stat-icon {
            font-size: 1.6rem;
            color: var(--accent);
            margin-bottom: 16px;
            opacity: 0.7;
        }

        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stat-number {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-card {
                padding: 24px 12px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
        }

        /* ===== Process / Flow Section ===== */
        .process-section {
            background: var(--bg-white);
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(to right, var(--accent), var(--accent-light), var(--accent));
            opacity: 0.3;
            z-index: 0;
        }

        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 8px;
        }

        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            margin: 0 auto 20px;
            border: 3px solid var(--accent);
            box-shadow: 0 0 0 4px var(--bg-white), var(--shadow-md);
        }

        .process-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .process-steps::before {
                display: none;
            }
        }

        @media (max-width: 640px) {
            .process-steps {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: var(--bg-light);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(212, 168, 67, 0.2);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            gap: 16px;
            transition: color var(--transition);
        }

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

        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        @media (max-width: 640px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--text-white);
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }

        .cta-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 36px;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 640px) {
            .cta-content h2 {
                font-size: 1.8rem;
            }
            .cta-content p {
                font-size: 1rem;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .logo {
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .footer-brand .logo .logo-icon {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        .footer-social {
            display: flex;
            gap: 16px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.95rem;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Mobile menu overlay ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 998;
            background: rgba(0, 0, 0, 0.3);
            opacity: 0;
            transition: opacity var(--transition);
        }

        .nav-overlay.show {
            opacity: 1;
        }

        @media (max-width: 768px) {
            .nav-overlay.show {
                display: block;
            }
        }

        /* ===== Scroll to top ===== */
        .scroll-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 999;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            box-shadow: var(--shadow-md);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: all var(--transition);
            border: none;
        }

        .scroll-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        .scroll-top:hover {
            background: var(--accent-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        @media (max-width: 640px) {
            .scroll-top {
                bottom: 20px;
                right: 20px;
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #c62828;
            --primary-dark: #b71c1c;
            --primary-light: #ef5350;
            --secondary: #1565c0;
            --secondary-light: #42a5f5;
            --accent: #ff8f00;
            --bg-body: #fafafa;
            --bg-white: #ffffff;
            --bg-light: #f5f5f5;
            --bg-dark: #1a1a2e;
            --text-primary: #212121;
            --text-secondary: #616161;
            --text-light: #9e9e9e;
            --text-white: #ffffff;
            --border-color: #e0e0e0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --shadow-hover: 0 16px 48px rgba(198,40,40,0.15);
            --transition: 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;
            --container: 1200px;
            --header-h: 72px;
        }

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

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-h);
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: var(--header-h);
        }
        .logo {
            display: flex; align-items: center; gap: 8px;
            font-size: 1.4rem; font-weight: 800; color: var(--text-primary);
            letter-spacing: -0.5px;
            text-decoration: none !important;
        }
        .logo .logo-icon {
            display: inline-flex; align-items: center; justify-content: center;
            width: 36px; height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-size: 1.1rem; font-weight: 700;
        }
        .logo span:not(.logo-icon) { color: var(--primary); }
        .logo:hover { color: var(--text-primary); }

        .nav-links { display: flex; align-items: center; gap: 32px; }
        .nav-links a {
            font-size: 0.95rem; font-weight: 500; color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
            text-decoration: none !important;
        }
        .nav-links a::after {
            content: ''; position: absolute; bottom: 0; left: 0;
            width: 0; height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav-links a:hover { color: var(--primary); }
        .nav-links a:hover::after { width: 100%; }
        .nav-links a.active { color: var(--primary); font-weight: 600; }
        .nav-links a.active::after { width: 100%; }
        .nav-links a.nav-cta {
            padding: 8px 20px;
            background: var(--primary);
            color: var(--text-white) !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .nav-links a.nav-cta::after { display: none; }
        .nav-links a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(198,40,40,0.30);
        }
        .nav-links a.nav-cta i { margin-left: 6px; font-size: 0.8rem; }

        .nav-toggle {
            display: none; flex-direction: column; gap: 5px;
            width: 30px; height: 24px;
            background: none; border: none; cursor: pointer;
            padding: 2px 0;
        }
        .nav-toggle span {
            display: block; width: 100%; height: 2.5px;
            background: var(--text-primary);
            border-radius: 3px;
            transition: var(--transition);
            transform-origin: center;
        }
        .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .nav-links {
                position: fixed; top: var(--header-h); left: 0; right: 0;
                flex-direction: column; gap: 8px;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                padding: 24px 20px 32px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-110%);
                opacity: 0;
                transition: transform 0.4s ease, opacity 0.4s ease;
                box-shadow: var(--shadow-md);
                z-index: 999;
                pointer-events: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a { font-size: 1.1rem; padding: 12px 0; width: 100%; }
            .nav-links a.nav-cta { text-align: center; margin-top: 8px; }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            margin-top: var(--header-h);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            position: relative;
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-hero .container { position: relative; z-index: 2; }
        .page-hero h1 {
            font-size: 2.4rem; font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            line-height: 1.25;
            max-width: 800px;
        }
        .page-hero .meta-line {
            display: flex; flex-wrap: wrap; gap: 16px 28px;
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
            margin-top: 8px;
        }
        .page-hero .meta-line i { margin-right: 6px; }
        .page-hero .meta-line .category-badge {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .page-hero { padding: 60px 0 40px; min-height: 200px; }
            .page-hero h1 { font-size: 1.6rem; }
            .page-hero .meta-line { gap: 10px 18px; font-size: 0.8rem; }
        }
        @media (max-width: 520px) {
            .page-hero h1 { font-size: 1.3rem; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 16px 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
        }
        .breadcrumb .container {
            display: flex; align-items: center; gap: 8px;
            font-size: 0.85rem; color: var(--text-light);
        }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb .sep { color: var(--text-light); font-size: 0.7rem; }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
            background: var(--bg-body);
        }
        .article-wrapper {
            display: grid; grid-template-columns: 1fr 300px; gap: 48px;
            align-items: start;
        }
        .article-main {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 40px;
            overflow: hidden;
        }
        .article-content {
            font-size: 1.05rem; line-height: 1.9;
            color: var(--text-primary);
        }
        .article-content p { margin-bottom: 1.4em; }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 28px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content h2, .article-content h3 {
            margin-top: 1.8em; margin-bottom: 0.6em;
            font-weight: 700;
        }
        .article-content h2 { font-size: 1.6rem; }
        .article-content h3 { font-size: 1.25rem; }
        .article-content ul, .article-content ol {
            margin: 1.2em 0; padding-left: 24px;
        }
        .article-content li { margin-bottom: 0.5em; }
        .article-content ul li { list-style: disc; }
        .article-content ol li { list-style: decimal; }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-light);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content a { color: var(--secondary); text-decoration: underline; }
        .article-content a:hover { color: var(--primary); }

        /* Tags */
        .article-tags {
            display: flex; flex-wrap: wrap; gap: 10px;
            margin-top: 36px; padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-tags span {
            font-size: 0.8rem; color: var(--text-light);
            font-weight: 500; margin-right: 4px;
        }
        .article-tags a {
            display: inline-block;
            padding: 4px 16px;
            background: var(--bg-light);
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            transition: var(--transition);
            text-decoration: none !important;
        }
        .article-tags a:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Sidebar ===== */
        .article-sidebar { display: flex; flex-direction: column; gap: 32px; }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem; font-weight: 700;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary);
            display: flex; align-items: center; gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: block;
            font-size: 0.9rem; font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            text-decoration: none !important;
        }
        .sidebar-list a:hover { color: var(--primary); padding-left: 6px; }
        .sidebar-list .meta {
            display: block;
            font-size: 0.75rem; color: var(--text-light);
            margin-top: 4px;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            text-align: center;
            padding: 32px 24px;
        }
        .sidebar-cta h4 { color: #fff; font-size: 1.15rem; margin-bottom: 12px; }
        .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 20px; }
        .sidebar-cta .btn {
            display: inline-block;
            background: #fff; color: var(--primary);
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: var(--transition);
            text-decoration: none !important;
        }
        .sidebar-cta .btn:hover { background: var(--accent); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }

        @media (max-width: 1024px) {
            .article-wrapper { grid-template-columns: 1fr; gap: 32px; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        }
        @media (max-width: 640px) {
            .article-sidebar { grid-template-columns: 1fr; }
            .article-main { padding: 24px 20px; }
            .article-content { font-size: 1rem; }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-box .icon { font-size: 4rem; color: var(--text-light); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }
        .not-found-box .btn-back {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
            text-decoration: none !important;
        }
        .not-found-box .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.80);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo .logo-icon { background: var(--primary); }
        .footer-brand .logo span:not(.logo-icon) { color: var(--primary-light); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.60); max-width: 320px; }
        .footer-col h4 {
            font-size: 1rem; font-weight: 700; color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul a {
            font-size: 0.88rem; color: rgba(255,255,255,0.65);
            transition: var(--transition);
            text-decoration: none !important;
        }
        .footer-col ul a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-col ul a i { width: 20px; margin-right: 6px; color: var(--primary-light); }
        .footer-bottom {
            display: flex; justify-content: space-between; align-items: center;
            padding: 24px 0;
            font-size: 0.8rem; color: rgba(255,255,255,0.40);
            flex-wrap: wrap; gap: 12px;
        }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a {
            color: rgba(255,255,255,0.50);
            font-size: 1.15rem;
            transition: var(--transition);
        }
        .footer-social a:hover { color: var(--primary-light); transform: translateY(-2px); }

        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 640px) {
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }

        /* ===== JSON-LD inline ===== */

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0d1b2a;
            --primary-light: #1b2d45;
            --accent: #c9a84c;
            --accent-hover: #dbb95c;
            --accent-dark: #b8942e;
            --bg: #ffffff;
            --bg-light: #f8f7f4;
            --bg-dark: #0d1b2a;
            --text: #1a1a2e;
            --text-light: #5a5a6e;
            --text-white: #ffffff;
            --text-muted: #8a8a9e;
            --border: #e8e6e1;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            padding-top: var(--header-height);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 600;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.6rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.6rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 0.75rem;
            color: var(--text-light);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: var(--primary);
            border-radius: 8px;
            font-size: 1.2rem;
            font-weight: 800;
        }
        .logo span {
            color: var(--accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            position: relative;
            padding: 4px 0;
            letter-spacing: 0.2px;
            transition: var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            width: 100%;
            background: var(--accent);
        }
        .nav-links a.nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: var(--accent);
            color: var(--primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .nav-links a.nav-cta::after {
            display: none;
        }
        .nav-links a.nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(201, 168, 76, 0.35);
        }
        .nav-links a.nav-cta i {
            font-size: 0.8rem;
            transition: var(--transition);
        }
        .nav-links a.nav-cta:hover i {
            transform: translateX(3px);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 4px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            padding: 80px 0 72px;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center center;
            background-blend-mode: overlay;
            overflow: hidden;
            isolation: isolate;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 27, 42, 0.88) 30%, rgba(13, 27, 42, 0.55) 80%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(201, 168, 76, 0.2);
            border: 1px solid rgba(201, 168, 76, 0.3);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--accent);
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .category-hero h1 {
            color: var(--text-white);
            font-weight: 700;
            max-width: 720px;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .category-hero h1 span {
            color: var(--accent);
        }
        .category-hero p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(201, 168, 76, 0.3);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 72px 0;
        }
        .section-bg-light {
            background: var(--bg-light);
        }
        .section-bg-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            margin-bottom: 12px;
        }
        .section-title .subtitle {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title.light h2 {
            color: var(--text-white);
        }
        .section-title.light .subtitle {
            color: rgba(255, 255, 255, 0.65);
        }
        .section-title .label-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(201, 168, 76, 0.12);
            color: var(--accent-dark);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title.light .label-tag {
            background: rgba(201, 168, 76, 0.18);
            color: var(--accent);
        }

        /* ===== Overview / Intro ===== */
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .overview-content h2 {
            margin-bottom: 16px;
        }
        .overview-content p {
            margin-bottom: 16px;
            color: var(--text-light);
        }
        .overview-content .feature-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 20px;
        }
        .overview-content .feature-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
        }
        .overview-content .feature-list li i {
            color: var(--accent);
            font-size: 1rem;
            width: 20px;
            text-align: center;
        }
        .overview-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            aspect-ratio: 4/3;
            background: var(--bg-light);
        }
        .overview-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .overview-image:hover img {
            transform: scale(1.03);
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
            gap: 24px;
        }
        .card-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-item {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .card-item .card-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-light);
        }
        .card-item .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .card-item:hover .card-img img {
            transform: scale(1.06);
        }
        .card-item .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-item .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(201, 168, 76, 0.12);
            color: var(--accent-dark);
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .card-item h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--primary);
        }
        .card-item p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-bottom: 12px;
            flex: 1;
        }
        .card-item .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 14px;
            margin-top: auto;
        }
        .card-item .card-meta i {
            margin-right: 4px;
        }
        .card-item .card-link {
            color: var(--accent-dark);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
            margin-top: 8px;
        }
        .card-item .card-link:hover {
            gap: 12px;
            color: var(--accent);
        }

        /* ===== Stats / Data ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }
        .stat-item .stat-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
            opacity: 0.6;
        }

        /* ===== News List ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 18px 22px;
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .news-item:hover {
            transform: translateX(6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .news-item .news-date {
            flex-shrink: 0;
            width: 56px;
            text-align: center;
            font-weight: 700;
            color: var(--accent-dark);
            line-height: 1.2;
        }
        .news-item .news-date .day {
            font-size: 1.5rem;
            display: block;
        }
        .news-item .news-date .month {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: var(--text-muted);
        }
        .news-item .news-content {
            flex: 1;
        }
        .news-item .news-content h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
            color: var(--primary);
            transition: var(--transition);
        }
        .news-item:hover .news-content h4 {
            color: var(--accent-dark);
        }
        .news-item .news-content p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .news-item .news-tag {
            flex-shrink: 0;
            padding: 4px 14px;
            background: var(--bg-light);
            border-radius: 50px;
            font-size: 0.78rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(201, 168, 76, 0.2);
        }
        .faq-item .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary);
            transition: var(--transition);
            user-select: none;
        }
        .faq-item .faq-question i {
            color: var(--accent);
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            padding: 0 24px;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center;
            padding: 80px 0;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 27, 42, 0.85) 20%, rgba(13, 27, 42, 0.6) 80%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: var(--text-white);
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .footer-brand .logo .logo-icon {
            background: var(--accent);
            color: var(--primary);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 340px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-col ul li a i {
            width: 16px;
            font-size: 0.85rem;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-social {
            display: flex;
            gap: 16px;
        }
        .footer-social a {
            color: rgba(255, 255, 255, 0.4);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            color: var(--accent);
            transform: scale(1.15);
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 999;
            width: 48px;
            height: 48px;
            background: var(--accent);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(201, 168, 76, 0.3);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition);
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-hover);
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(201, 168, 76, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .overview-image {
                order: -1;
                aspect-ratio: 16/9;
            }
            .card-grid.cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                gap: 4px;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-110%);
                opacity: 0;
                transition: var(--transition);
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
                pointer-events: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                padding: 12px 0;
                font-size: 1rem;
                width: 100%;
                border-bottom: 1px solid var(--border);
            }
            .nav-links a:last-of-type {
                border-bottom: none;
            }
            .nav-links a.nav-cta {
                margin-top: 8px;
                justify-content: center;
                padding: 12px 20px;
                width: 100%;
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero {
                padding: 56px 0 48px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .section {
                padding: 48px 0;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid.cols-3 {
                grid-template-columns: 1fr;
            }
            .overview-content .feature-list {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 16px 18px;
            }
            .news-item .news-date {
                display: flex;
                gap: 6px;
                width: auto;
                align-items: baseline;
            }
            .news-item .news-date .day {
                font-size: 1.2rem;
                display: inline;
            }
            .news-item .news-date .month {
                font-size: 0.75rem;
            }
            .news-item .news-tag {
                align-self: flex-start;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item .stat-number {
                font-size: 1.6rem;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }