/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1d2f;
            --primary-light: #1a3050;
            --primary-dark: #080f1a;
            --accent: #f5b342;
            --accent-dark: #d4942e;
            --accent-light: #fad488;
            --accent-secondary: #ff6b35;
            --bg: #f7f8fc;
            --bg-light: #ffffff;
            --bg-dark: #0a1422;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aa0;
            --text-light: #f0f2f6;
            --border: #e8e8f0;
            --border-light: #f0f2f8;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(15, 29, 47, 0.04);
            --shadow-md: 0 4px 20px rgba(15, 29, 47, 0.07);
            --shadow-lg: 0 12px 40px rgba(15, 29, 47, 0.10);
            --shadow-xl: 0 20px 60px rgba(15, 29, 47, 0.14);
            --transition: 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
            --spacing-section: 100px;
            --spacing-section-mobile: 60px;
        }

        /* ===== 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);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        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;
            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: 700;
            color: var(--text-primary);
        }
        h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.15rem, 2vw, 1.4rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 0.5rem;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-padding {
            padding: var(--spacing-section) 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: var(--spacing-section-mobile) 0;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(15, 29, 47, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid rgba(245, 179, 66, 0.10);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(15, 29, 47, 0.98);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.30);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.3px;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
            color: var(--primary);
            flex-shrink: 0;
        }
        .logo span {
            background: linear-gradient(to right, #fff, #e0e4ec);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.70);
            transition: var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-list a.active {
            color: var(--accent);
            background: rgba(245, 179, 66, 0.10);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px !important;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark)) !important;
            color: var(--primary) !important;
            font-weight: 700 !important;
            border-radius: var(--radius-sm) !important;
            box-shadow: 0 4px 14px rgba(245, 179, 66, 0.30);
            transition: var(--transition) !important;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 179, 66, 0.40);
            color: var(--primary) !important;
            background: linear-gradient(135deg, #fbc85a, var(--accent-dark)) !important;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-sm);
            cursor: pointer;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: #fff;
            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);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(15, 29, 47, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 1px solid rgba(245, 179, 66, 0.10);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.30);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
                justify-content: center;
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-cta {
                margin-top: 8px;
                justify-content: center;
            }
        }

        /* ===== Hero Section ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            padding-top: var(--nav-height);
            background: var(--bg-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1.0);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 29, 47, 0.92) 0%, rgba(15, 29, 47, 0.70) 50%, rgba(15, 29, 47, 0.88) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            padding: 40px 0 80px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 179, 66, 0.15);
            border: 1px solid rgba(245, 179, 66, 0.25);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 28px;
            letter-spacing: 0.3px;
        }
        .hero-badge i {
            font-size: 0.7rem;
        }
        .hero h1 {
            color: #fff;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
        }
        .hero h1 .highlight {
            background: linear-gradient(to right, var(--accent), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.70);
            max-width: 600px;
            line-height: 1.8;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 36px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
            box-shadow: 0 6px 24px rgba(245, 179, 66, 0.35);
            transition: var(--transition);
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(245, 179, 66, 0.45);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 32px;
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.12);
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.20);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 52px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-stat {
            text-align: left;
        }
        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.50);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 80vh;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
        }

        /* ===== Section Titles ===== */
        .section-heading {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-heading h2 {
            margin-bottom: 12px;
        }
        .section-heading p {
            max-width: 580px;
            margin: 0 auto;
            color: var(--text-muted);
            font-size: 1.05rem;
        }
        .section-heading .subtitle {
            display: inline-block;
            font-size: 0.80rem;
            font-weight: 600;
            color: var(--accent-dark);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            background: rgba(245, 179, 66, 0.10);
            padding: 4px 16px;
            border-radius: 50px;
        }
        .section-heading.left {
            text-align: left;
        }
        .section-heading.left p {
            margin: 0;
        }

        /* ===== Intro / About ===== */
        .intro-section {
            background: var(--bg-light);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .intro-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .intro-image:hover img {
            transform: scale(1.03);
        }
        .intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 29, 47, 0.20), transparent);
        }
        .intro-text h2 {
            margin-bottom: 20px;
        }
        .intro-text p {
            margin-bottom: 16px;
            font-size: 1.02rem;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 28px;
        }
        .intro-feature {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
        }
        .intro-feature i {
            color: var(--accent-dark);
            font-size: 1.1rem;
            width: 20px;
            text-align: center;
        }
        .intro-feature span {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-primary);
        }
        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .intro-image img {
                height: 260px;
            }
            .intro-features {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Categories / Services ===== */
        .categories-section {
            background: var(--bg);
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            background: var(--bg-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(245, 179, 66, 0.20);
        }
        .category-card-image {
            position: relative;
            overflow: hidden;
            height: 200px;
        }
        .category-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .category-card:hover .category-card-image img {
            transform: scale(1.06);
        }
        .category-card-image .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.72rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .category-card-body {
            padding: 24px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card-body h3 {
            margin-bottom: 10px;
            font-size: 1.15rem;
        }
        .category-card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            flex: 1;
            margin-bottom: 18px;
        }
        .category-card-body .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.90rem;
            color: var(--accent-dark);
            transition: var(--transition);
        }
        .category-card-body .btn-text i {
            transition: var(--transition);
            font-size: 0.8rem;
        }
        .category-card-body .btn-text:hover {
            gap: 12px;
            color: var(--primary);
        }
        @media (max-width: 1024px) {
            .categories-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 620px) {
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .category-card-image {
                height: 180px;
            }
        }

        /* ===== Advantages / Stats ===== */
        .advantages-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .advantages-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
        }
        .advantages-section .section-heading h2 {
            color: #fff;
        }
        .advantages-section .section-heading p {
            color: rgba(255, 255, 255, 0.55);
        }
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            z-index: 1;
        }
        .advantage-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
        }
        .advantage-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(245, 179, 66, 0.15);
            transform: translateY(-4px);
        }
        .advantage-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 20px;
            background: rgba(245, 179, 66, 0.10);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent);
            transition: var(--transition);
        }
        .advantage-card:hover .advantage-icon {
            background: rgba(245, 179, 66, 0.18);
            transform: scale(1.06);
        }
        .advantage-card h4 {
            color: #fff;
            margin-bottom: 10px;
            font-size: 1.05rem;
        }
        .advantage-card p {
            color: rgba(255, 255, 255, 0.50);
            font-size: 0.88rem;
            margin-bottom: 0;
        }
        @media (max-width: 1024px) {
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .advantages-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== News / CMS List ===== */
        .news-section {
            background: var(--bg-light);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            padding: 24px 26px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .news-card:hover {
            border-color: rgba(245, 179, 66, 0.20);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .news-card .news-category {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(245, 179, 66, 0.10);
            padding: 2px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
            text-transform: uppercase;
            letter-spacing: 0.3px;
        }
        .news-card h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .news-card h3 a {
            color: var(--text-primary);
        }
        .news-card h3 a:hover {
            color: var(--accent-dark);
        }
        .news-card p {
            font-size: 0.90rem;
            color: var(--text-muted);
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.80rem;
            color: var(--text-muted);
        }
        .news-card .news-meta i {
            margin-right: 4px;
        }
        .no-data {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 1rem;
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .news-more {
            text-align: center;
            margin-top: 36px;
        }
        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Steps / Process ===== */
        .steps-section {
            background: var(--bg);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: calc(12.5% + 16px);
            right: calc(12.5% + 16px);
            height: 2px;
            background: linear-gradient(to right, var(--accent), var(--accent-light), var(--accent));
            opacity: 0.30;
        }
        .step-card {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .step-number {
            width: 56px;
            height: 56px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(245, 179, 66, 0.25);
        }
        .step-card h4 {
            margin-bottom: 10px;
            font-size: 1.05rem;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }
            .steps-grid::before {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-light);
        }
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(245, 179, 66, 0.15);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.0rem;
            color: var(--text-primary);
            cursor: pointer;
            gap: 16px;
            transition: var(--transition);
        }
        .faq-question i {
            color: var(--accent-dark);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.40s ease, padding 0.30s ease;
            padding: 0 24px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 0.92rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-content h2 {
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.60);
            font-size: 1.08rem;
            margin-bottom: 36px;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .cta-actions .btn-primary {
            font-size: 1.1rem;
            padding: 18px 44px;
        }
        .cta-actions .btn-secondary {
            padding: 18px 36px;
            font-size: 1.0rem;
        }
        .cta-trust {
            display: flex;
            justify-content: center;
            gap: 32px;
            margin-top: 40px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .cta-trust i {
            margin-right: 6px;
            color: var(--accent);
        }
        @media (max-width: 520px) {
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn-primary,
            .cta-actions .btn-secondary {
                text-align: center;
                justify-content: center;
            }
            .cta-trust {
                flex-direction: column;
                gap: 12px;
                align-items: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.60);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 1.2rem;
        }
        .footer-brand p {
            font-size: 0.90rem;
            color: rgba(255, 255, 255, 0.40);
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h5 {
            font-size: 0.90rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.50);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.30);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.30);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== Scroll to top ===== */
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 900;
            width: 46px;
            height: 46px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            box-shadow: 0 4px 16px rgba(245, 179, 66, 0.25);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: var(--transition);
        }
        .scroll-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .scroll-top:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(245, 179, 66, 0.35);
        }
        @media (max-width: 520px) {
            .scroll-top {
                bottom: 20px;
                right: 20px;
                width: 40px;
                height: 40px;
                font-size: 0.95rem;
            }
        }

        /* ===== Responsive Utilities ===== */
        @media (max-width: 1024px) {
            :root {
                --spacing-section: 80px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
            }
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #10b981;
            --accent-dark: #059669;
            --dark: #0f172a;
            --dark-2: #1e293b;
            --dark-3: #334155;
            --text: #1e293b;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --header-h: 72px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            color: var(--dark);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 800;
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            font-weight: 700;
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
            font-weight: 600;
        }
        h4 {
            font-size: 1.15rem;
            font-weight: 600;
        }
        p {
            color: var(--text-light);
            margin-bottom: 1rem;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 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;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover,
        .btn-primary:focus-visible {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
        }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-secondary:hover,
        .btn-secondary:focus-visible {
            background: var(--secondary-dark);
            border-color: var(--secondary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover,
        .btn-outline:focus-visible {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            border: 1px solid rgba(37, 99, 235, 0.15);
        }
        .badge-hot {
            background: #fef2f2;
            color: #dc2626;
            border-color: rgba(220, 38, 38, 0.15);
        }
        .badge-new {
            background: #ecfdf5;
            color: #059669;
            border-color: rgba(5, 150, 105, 0.15);
        }
        .badge-gold {
            background: #fffbeb;
            color: #d97706;
            border-color: rgba(217, 119, 6, 0.15);
        }

        /* ===== Section ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--dark);
            color: #fff;
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: #fff;
        }
        .section-dark p {
            color: var(--text-lighter);
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto var(--spacing-block);
        }
        .section-header p {
            font-size: 1.1rem;
            margin-top: 12px;
        }
        .section-subtitle {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: all var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--dark);
            text-decoration: none;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            font-weight: 700;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text);
            font-size: 0.92rem;
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav-list a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-list a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
        }
        .nav-list a.nav-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--dark);
            border-radius: 4px;
            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);
        }

        /* ===== Banner ===== */
        .page-banner {
            padding: calc(var(--header-h) + 60px) 0 60px;
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-banner h1 {
            color: #fff;
            margin-bottom: 16px;
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.15rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-bottom: 20px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .page-banner .breadcrumb a:hover {
            color: #fff;
        }
        .page-banner .breadcrumb span {
            color: var(--secondary);
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px;
        }
        .card-body .badge {
            margin-bottom: 10px;
        }
        .card-body h3,
        .card-body h4 {
            margin-bottom: 8px;
        }
        .card-body p {
            font-size: 0.92rem;
            margin-bottom: 16px;
        }
        .card-footer {
            padding: 16px 24px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-lighter);
        }
        .card-footer a {
            font-weight: 600;
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }

        /* ===== Feature / Icon Blocks ===== */
        .feature-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius);
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 1.6rem;
        }
        .feature-card h4 {
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* ===== Stats ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }

        /* ===== Timeline / Process ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .process-step {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            position: relative;
            transition: all var(--transition);
        }
        .process-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .process-step::before {
            counter-increment: step;
            content: counter(step);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .process-step h4 {
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.88rem;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            color: var(--dark);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: all var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 0.85rem;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .faq-item.active .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            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 {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 64px 0;
            text-align: center;
            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;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }
        .cta-section .btn:hover {
            background: transparent;
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .logo:hover {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --spacing-section: 48px;
                --spacing-block: 32px;
            }
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.nav-cta {
                text-align: center;
                margin-top: 8px;
            }
            .nav-toggle {
                display: flex;
            }
            .grid-2,
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .page-banner {
                padding: calc(var(--header-h) + 40px) 0 40px;
                min-height: 200px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .section-header p {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
            .container {
                padding: 0 16px;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
            .card-body {
                padding: 18px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== Extra Utilities ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 12px;
        }
        .mt-2 {
            margin-top: 24px;
        }
        .mt-3 {
            margin-top: 40px;
        }
        .gap-1 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            background: var(--bg-alt);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary-bg);
            color: var(--primary);
            border-color: var(--primary-light);
        }

        /* category page specific */
        .cat-header {
            margin-bottom: 32px;
        }
        .cat-header .tag-group {
            margin-top: 12px;
        }
        .cat-grid .card .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
        }
        .cat-grid .card {
            position: relative;
        }
        .cat-grid .card-img-wrap {
            position: relative;
            overflow: hidden;
        }
        .cat-grid .card-img-wrap .card-img {
            transition: transform 0.5s ease;
        }
        .cat-grid .card:hover .card-img-wrap .card-img {
            transform: scale(1.05);
        }
        .cat-sidebar .card {
            margin-bottom: 20px;
        }
        .cat-sidebar .card-body {
            padding: 18px;
        }
        .cat-sidebar .card-body h4 {
            font-size: 1rem;
        }
        .cat-sidebar .card-body p {
            font-size: 0.85rem;
        }

        /* live indicator */
        .live-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #dc2626;
            animation: pulse-dot 1.5s ease-in-out infinite;
            margin-right: 6px;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(0.8);
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #0b1d3a;
  --primary-light: #1a3a6a;
  --primary-dark: #070f1e;
  --accent: #d4a843;
  --accent-light: #f0c860;
  --accent-dark: #b8922e;
  --bg-body: #f4f6f9;
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --bg-dark: #0b1d3a;
  --bg-footer: #070f1e;
  --text-primary: #1a1a2e;
  --text-secondary: #5a6a7e;
  --text-light: #8a9aae;
  --text-white: #ffffff;
  --text-accent: #d4a843;
  --border-color: #e8ecf1;
  --border-light: #f0f2f5;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --container-max: 1200px;
  --header-height: 72px;
}

/* ===== 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-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }

/* ===== Container ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ===== Header / Navigation ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 29, 58, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(212, 168, 67, 0.15);
  height: var(--header-height);
  transition: var(--transition);
}
.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-white);
  letter-spacing: -0.3px;
  transition: var(--transition);
}
.logo:hover { color: var(--accent); opacity: 0.92; }
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: var(--radius-sm);
  color: var(--primary-dark);
  font-weight: 900;
  font-size: 1.3rem;
  line-height: 1;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-list a {
  position: relative;
  padding: 8px 18px;
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255,255,255,0.78);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-list a:hover {
  color: var(--text-white);
  background: rgba(212, 168, 67, 0.12);
}
.nav-list a.active {
  color: var(--text-white);
  background: rgba(212, 168, 67, 0.18);
}
.nav-list a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.nav-list a.nav-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--primary-dark);
  font-weight: 700;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 14px rgba(212, 168, 67, 0.3);
  transition: var(--transition);
}
.nav-list a.nav-cta:hover {
  box-shadow: 0 6px 24px rgba(212, 168, 67, 0.45);
  transform: translateY(-1px);
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  color: var(--primary-dark);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--text-white);
  border-radius: 4px;
  transition: var(--transition);
}
.nav-toggle:hover { background: rgba(255,255,255,0.15); }
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-list {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(11, 29, 58, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 20px 24px 28px;
    gap: 6px;
    border-bottom: 1px solid rgba(212, 168, 67, 0.12);
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
  }
  .nav-list.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-list a { width: 100%; text-align: center; padding: 12px 18px; font-size: 1.05rem; }
  .nav-list a.nav-cta { margin-top: 8px; }
}

/* ===== Article Hero ===== */
.article-hero {
  margin-top: var(--header-height);
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  background: var(--primary-dark);
  overflow: hidden;
}
.article-hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.30;
  mix-blend-mode: overlay;
}
.article-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,29,58,0.92) 0%, rgba(11,29,58,0.70) 100%);
}
.article-hero .container {
  position: relative;
  z-index: 2;
  padding-top: 48px;
  padding-bottom: 48px;
  text-align: center;
}
.article-breadcrumb {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
}
.article-breadcrumb a { color: rgba(255,255,255,0.7); }
.article-breadcrumb a:hover { color: var(--accent); }
.article-breadcrumb .sep { color: rgba(255,255,255,0.35); }
.article-category-badge {
  display: inline-block;
  background: rgba(212,168,67,0.18);
  color: var(--accent-light);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}
.article-hero h1 {
  color: var(--text-white);
  max-width: 860px;
  margin: 0 auto 16px;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}
.article-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
}
.article-meta i { margin-right: 6px; color: var(--accent-light); opacity: 0.7; }
@media (max-width: 768px) {
  .article-hero { min-height: 240px; }
  .article-hero .container { padding-top: 32px; padding-bottom: 32px; }
  .article-meta { gap: 12px; font-size: 0.82rem; }
}

/* ===== Article Body ===== */
.article-section {
  padding: 56px 0;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
}
.article-main {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 40px;
  overflow: hidden;
}
.article-featured-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
}
.article-featured-image img {
  width: 100%;
  height: auto;
  display: block;
}
.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-primary);
}
.article-content p {
  margin-bottom: 1.2em;
}
.article-content h2, .article-content h3 {
  margin-top: 1.6em;
  margin-bottom: 0.6em;
}
.article-content ul, .article-content ol {
  margin-bottom: 1.2em;
  padding-left: 1.6em;
}
.article-content li {
  margin-bottom: 0.4em;
  list-style: disc;
}
.article-content a {
  color: var(--accent-dark);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.article-content a:hover { color: var(--primary); }
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: rgba(212,168,67,0.06);
  padding: 16px 24px;
  margin: 1.2em 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-content img {
  border-radius: var(--radius-md);
  margin: 1.2em 0;
  box-shadow: var(--shadow-sm);
}
.article-footer-meta {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  display: inline-block;
  background: var(--bg-body);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.tag:hover {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
}
.article-share {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.article-share a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-body);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.article-share a:hover {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* ===== 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-md);
  padding: 28px 24px;
}
.sidebar-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}
.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.sidebar-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  line-height: 1.5;
}
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a {
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 500;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.sidebar-list a:hover { color: var(--accent-dark); }
.sidebar-list .sidebar-date {
  font-size: 0.78rem;
  color: var(--text-light);
  font-weight: 400;
  white-space: nowrap;
}
.sidebar-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--text-white);
  text-align: center;
  padding: 32px 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}
.sidebar-cta h4 { color: var(--text-white); border-bottom-color: var(--accent); }
.sidebar-cta p { color: rgba(255,255,255,0.75); font-size: 0.9rem; margin: 12px 0 20px; }
.sidebar-cta .btn-accent {
  display: inline-block;
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 700;
  padding: 12px 32px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(212,168,67,0.35);
  transition: var(--transition);
}
.sidebar-cta .btn-accent:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(212,168,67,0.45);
  color: var(--primary-dark);
}

/* ===== Related Posts ===== */
.related-section {
  padding: 60px 0;
  background: var(--bg-white);
}
.related-header {
  text-align: center;
  margin-bottom: 40px;
}
.related-header h2 {
  position: relative;
  display: inline-block;
}
.related-header h2::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  margin: 12px auto 0;
  border-radius: 4px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--bg-body);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-light);
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}
.related-card-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}
.related-card-body {
  padding: 18px 20px 22px;
}
.related-card-body h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}
.related-card-body h4 a { color: var(--text-primary); }
.related-card-body h4 a:hover { color: var(--accent-dark); }
.related-card-body .meta {
  font-size: 0.8rem;
  color: var(--text-light);
  display: flex;
  gap: 12px;
}
.related-card-body .meta i { margin-right: 4px; }

/* ===== CTA Section ===== */
.cta-section {
  padding: 72px 0;
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  opacity: 0.08;
}
.cta-section .container {
  position: relative;
  z-index: 2;
  text-align: center;
}
.cta-section h2 {
  color: var(--text-white);
  margin-bottom: 16px;
}
.cta-section p {
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 1.05rem;
  padding: 16px 40px;
  border-radius: var(--radius-md);
  box-shadow: 0 6px 24px rgba(212,168,67,0.35);
  transition: var(--transition);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  transform: translateY(-2px);
  box-shadow: 0 10px 36px rgba(212,168,67,0.45);
  color: var(--primary-dark);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--text-white);
  font-weight: 600;
  font-size: 1.05rem;
  padding: 16px 40px;
  border-radius: var(--radius-md);
  border: 2px solid rgba(212,168,67,0.4);
  transition: var(--transition);
}
.btn-outline:hover {
  border-color: var(--accent);
  background: rgba(212,168,67,0.08);
  color: var(--accent-light);
}

/* ===== Not Found ===== */
.not-found-box {
  text-align: center;
  padding: 80px 24px;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.not-found-box h2 {
  font-size: 2.2rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.not-found-box p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 24px;
}
.not-found-box .btn-primary { display: inline-flex; }

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-footer);
  color: rgba(255,255,255,0.7);
  padding: 56px 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-brand .logo { font-size: 1.2rem; margin-bottom: 16px; display: inline-flex; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; margin-top: 12px; }
.footer-col h5 {
  color: var(--text-white);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
  padding: 6px 0;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 0;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ===== Responsive: Article Layout ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 768px) {
  .article-main { padding: 24px; }
  .related-grid { grid-template-columns: 1fr 1fr; }
  .article-sidebar { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .article-main { padding: 16px; border-radius: var(--radius-md); }
  .related-grid { grid-template-columns: 1fr; }
  .article-footer-meta { flex-direction: column; align-items: flex-start; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
}