/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1e5eff;
            --primary-dark: #0f3bb3;
            --primary-light: #4d82ff;
            --accent: #ff6b35;
            --accent-light: #ff8f66;
            --dark: #0b1220;
            --dark-2: #111b2e;
            --dark-3: #16233b;
            --bg: #f5f7fb;
            --bg-white: #ffffff;
            --text: #1a2333;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.10);
            --shadow-primary: 0 8px 24px rgba(30, 94, 255, 0.2);
            --transition: all 0.3s ease;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        /* ===== Base Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        input,
        textarea {
            font-family: inherit;
            outline: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
        }
        p {
            margin: 0;
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 90px 0;
        }
        .section-sm {
            padding: 60px 0;
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .section-head {
            margin-bottom: 48px;
            text-align: center;
        }
        .section-tag {
            display: inline-block;
            background: rgba(30, 94, 255, 0.1);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 32px;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 18, 32, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(11, 18, 32, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            position: relative;
        }
        .header-nav-left,
        .header-nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .header-nav-left {
            flex: 1;
            justify-content: flex-start;
            padding-left: 0;
        }
        .header-nav-right {
            flex: 1;
            justify-content: flex-end;
        }
        .header-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0 24px;
            flex-shrink: 0;
        }
        .header-logo i {
            color: var(--accent);
            font-size: 24px;
        }
        .header-logo:hover {
            color: #fff;
        }
        .nav-item {
            color: rgba(255, 255, 255, 0.78);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 4px;
            position: relative;
            white-space: nowrap;
        }
        .nav-item::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-item:hover {
            color: #fff;
        }
        .nav-item:hover::after,
        .nav-item.active::after {
            width: 100%;
        }
        .nav-item.active {
            color: #fff;
            font-weight: 600;
        }
        .btn-header {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 9px 22px;
            border-radius: 24px;
            transition: var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
        }
        .btn-header:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(30, 94, 255, 0.35);
        }
        .btn-header:focus {
            outline: 2px solid rgba(255, 255, 255, 0.6);
            outline-offset: 2px;
        }
        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            color: #fff;
            font-size: 20px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        .mobile-toggle:focus {
            outline: 2px solid rgba(255, 255, 255, 0.5);
        }
        .mobile-nav {
            display: none;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            background: var(--dark-2);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 12px 24px;
            flex-direction: column;
            gap: 4px;
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-link {
            display: block;
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            font-weight: 500;
            padding: 12px 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .mobile-link:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .mobile-link.active {
            color: var(--accent);
            background: rgba(255, 107, 53, 0.12);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 140px 0 100px;
            background: linear-gradient(135deg, rgba(11, 18, 32, 0.92) 0%, rgba(15, 35, 70, 0.82) 50%, rgba(11, 18, 32, 0.92) 100%), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(30, 94, 255, 0.25);
            filter: blur(80px);
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 107, 53, 0.15);
            filter: blur(60px);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: rgba(255, 255, 255, 0.9);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 18px;
            border-radius: 32px;
            margin-bottom: 24px;
            backdrop-filter: blur(8px);
        }
        .hero-badge i {
            color: var(--accent);
        }
        .hero-title {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }
        .hero-title span {
            background: linear-gradient(135deg, var(--accent) 0%, #ffb347 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-subtitle {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 36px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-hero-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 32px;
            border: 2px solid transparent;
            transition: var(--transition);
        }
        .btn-hero-primary:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(30, 94, 255, 0.4);
        }
        .btn-hero-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            padding: 14px 32px;
            border-radius: 32px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }
        .btn-hero-secondary:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            transform: translateY(-2px);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-hero-primary:focus,
        .btn-hero-secondary:focus {
            outline: 2px solid rgba(255, 255, 255, 0.5);
            outline-offset: 2px;
        }
        .hero-scroll {
            position: absolute;
            bottom: 32px;
            left: 50%;
            transform: translateX(-50%);
            color: rgba(255, 255, 255, 0.5);
            font-size: 20px;
            animation: bounce 2s infinite;
            z-index: 2;
        }
        @keyframes bounce {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

        /* ===== Stats ===== */
        .stats-section {
            position: relative;
            background: var(--dark);
            padding: 64px 0;
            z-index: 3;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .stat-item {
            text-align: center;
            padding: 24px 16px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.16);
        }
        .stat-icon {
            font-size: 28px;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 6px;
        }

        /* ===== Features ===== */
        .features-section {
            background: var(--bg);
            padding: 100px 0;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 36px 28px;
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: rgba(30, 94, 255, 0.2);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            background: rgba(30, 94, 255, 0.1);
            color: var(--primary);
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.06);
        }
        .feature-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== Platform Advantages ===== */
        .advantages-section {
            background: var(--bg-white);
            padding: 100px 0;
        }
        .advantage-row {
            display: flex;
            align-items: center;
            gap: 60px;
            margin-bottom: 80px;
        }
        .advantage-row:last-child {
            margin-bottom: 0;
        }
        .advantage-row.reverse {
            flex-direction: row-reverse;
        }
        .advantage-image {
            flex: 1;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .advantage-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .advantage-image:hover img {
            transform: scale(1.04);
        }
        .advantage-content {
            flex: 1;
        }
        .advantage-tag {
            display: inline-block;
            background: rgba(255, 107, 53, 0.1);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 24px;
            margin-bottom: 16px;
        }
        .advantage-title {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.35;
        }
        .advantage-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .advantage-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .advantage-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text);
        }
        .advantage-list li i {
            color: var(--primary);
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ===== News Section ===== */
        .news-section {
            background: var(--bg);
            padding: 100px 0;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 32px;
            border: 1px solid var(--border);
            border-left: 4px solid var(--primary);
            transition: var(--transition);
            display: block;
        }
        .news-card:hover {
            box-shadow: var(--shadow-lg);
            border-left-color: var(--accent);
            transform: translateY(-3px);
            border-top-color: transparent;
            border-right-color: var(--border);
            border-bottom-color: var(--border);
        }
        .news-tag-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 12px;
        }
        .news-tag {
            display: inline-block;
            background: rgba(30, 94, 255, 0.1);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 16px;
        }
        .news-date {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .news-title {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
        }
        .news-title a {
            color: var(--text);
        }
        .news-title a:hover {
            color: var(--primary);
        }
        .news-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 60px 32px;
            text-align: center;
            color: var(--text-muted);
            border: 1px dashed var(--border);
            grid-column: 1 / -1;
        }
        .news-empty i {
            font-size: 40px;
            color: var(--border);
            display: block;
            margin-bottom: 16px;
        }

        /* ===== Categories ===== */
        .categories-section {
            background: var(--bg-white);
            padding: 100px 0;
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            min-height: 280px;
            display: flex;
            align-items: flex-end;
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .category-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 18, 32, 0) 30%, rgba(11, 18, 32, 0.85) 100%);
            transition: var(--transition);
        }
        .category-card:hover img {
            transform: scale(1.06);
        }
        .category-card:hover::after {
            background: linear-gradient(180deg, rgba(11, 18, 32, 0.05) 30%, rgba(11, 18, 32, 0.92) 100%);
        }
        .category-content {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            width: 100%;
        }
        .category-name {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .category-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 12px;
            line-height: 1.5;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.15);
            padding: 7px 18px;
            border-radius: 24px;
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }
        .category-link:hover {
            background: var(--primary);
            color: #fff;
            gap: 12px;
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--dark);
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }
        .steps-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
        }
        .steps-section .section-title {
            color: #fff;
        }
        .steps-section .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }
        .steps-section .section-tag {
            background: rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.85);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 24px;
        }
        .step-item {
            text-align: center;
            padding: 36px 20px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-4px);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            box-shadow: 0 4px 16px rgba(30, 94, 255, 0.4);
        }
        .step-title {
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 8px;
        }
        .step-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.5;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
            padding: 100px 0;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(30, 94, 255, 0.25);
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 16px;
            color: var(--primary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 28px 22px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 100px 0;
            background: linear-gradient(135deg, rgba(11, 18, 32, 0.9) 0%, rgba(15, 35, 70, 0.85) 100%), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            color: #fff;
            text-align: center;
        }
        .cta-title {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.6;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            padding: 15px 40px;
            border-radius: 36px;
            border: 2px solid transparent;
            transition: var(--transition);
        }
        .cta-btn:hover {
            background: #ff8147;
            color: #fff;
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 10px 32px rgba(255, 107, 53, 0.4);
        }
        .cta-btn:focus {
            outline: 2px solid rgba(255, 255, 255, 0.5);
            outline-offset: 3px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            padding: 70px 0 30px;
            color: rgba(255, 255, 255, 0.6);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-row {
            display: flex;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }
        .footer-brand {
            flex: 1;
            min-width: 260px;
        }
        .footer-brand .header-logo {
            font-size: 20px;
            padding: 0;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.6;
            max-width: 320px;
        }
        .footer-col {
            min-width: 140px;
        }
        .footer-col-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li {
            font-size: 14px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
            font-size: 13px;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Buttons (general) ===== */
        .btn {
            border-radius: 24px;
            font-weight: 600;
            padding: 11px 28px;
            font-size: 15px;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
        }
        .btn-outline-primary {
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline-primary:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn:focus {
            outline: 3px solid rgba(30, 94, 255, 0.3);
            box-shadow: none;
        }

        /* ===== Focus accessibility ===== */
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 76px 0;
            }
            .hero {
                padding: 130px 0 90px;
            }
            .hero-title {
                font-size: 42px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .header-nav-left,
            .header-nav-right {
                gap: 16px;
            }
            .header-logo {
                font-size: 18px;
                padding: 0 12px;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 36px;
            }
            .header-nav-left,
            .header-nav-right {
                display: none;
            }
            .mobile-toggle {
                display: inline-flex;
            }
            .header-logo {
                font-size: 18px;
                padding: 0;
            }
            .header-row {
                height: 64px;
            }
            .mobile-nav {
                top: 64px;
            }
            .hero {
                padding: 120px 0 80px;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn-hero-primary,
            .btn-hero-secondary {
                width: 100%;
                justify-content: center;
                max-width: 280px;
            }
            .stats-section {
                padding: 48px 0;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .stat-number {
                font-size: 30px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .advantage-row {
                flex-direction: column;
                gap: 32px;
                margin-bottom: 56px;
            }
            .advantage-row.reverse {
                flex-direction: column;
            }
            .advantage-image img {
                height: 260px;
            }
            .advantage-title {
                font-size: 24px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .categories-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-card {
                min-height: 220px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .faq-question {
                font-size: 15px;
                padding: 18px 20px;
            }
            .faq-answer {
                padding: 0 20px 18px;
                font-size: 14px;
            }
            .cta-section {
                padding: 72px 0;
            }
            .cta-title {
                font-size: 28px;
            }
            .cta-desc {
                font-size: 15px;
            }
            .footer-row {
                flex-direction: column;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 48px 0;
            }
            .hero {
                padding: 104px 0 64px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-badge {
                font-size: 12px;
                padding: 5px 14px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-number {
                font-size: 26px;
            }
            .stat-label {
                font-size: 13px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .news-card {
                padding: 22px 20px;
            }
            .category-content {
                padding: 24px 20px;
            }
            .step-item {
                padding: 28px 16px;
            }
            .cta-btn {
                font-size: 15px;
                padding: 13px 28px;
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }
            .footer-bottom {
                font-size: 12px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0d6efd;
            --primary-rgb: 13, 110, 253;
            --secondary: #00b79a;
            --secondary-rgb: 0, 183, 154;
            --bg: #f4f7fc;
            --surface: #ffffff;
            --text: #1b2a4a;
            --muted: #64748b;
            --border: #e6edf7;
            --radius: 20px;
            --radius-sm: 12px;
            --shadow: 0 14px 36px rgba(13, 110, 253, .08);
            --shadow-lg: 0 24px 60px rgba(13, 110, 253, .14);
            --transition: all .3s ease;
            --header-height: 76px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        .container {
            max-width: 1240px;
        }
        ::selection {
            background: rgba(var(--primary-rgb), .15);
            color: var(--primary);
        }
        .site-header {
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1050;
            height: var(--header-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            position: relative;
        }
        .header-logo {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: .2px;
            display: flex;
            align-items: center;
            gap: .5rem;
            color: var(--text);
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            white-space: nowrap;
        }
        .header-logo i {
            color: var(--primary);
            font-size: 1.7rem;
            background: rgba(var(--primary-rgb), .1);
            border-radius: 10px;
            padding: .3rem;
            width: 2.2rem;
            height: 2.2rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .header-logo:hover {
            color: var(--primary);
        }
        .header-nav-left,
        .header-nav-right {
            display: flex;
            align-items: center;
            gap: .15rem;
        }
        .nav-item {
            padding: .5rem 1rem;
            border-radius: 999px;
            color: var(--muted);
            font-weight: 600;
            font-size: .9rem;
            transition: var(--transition);
        }
        .nav-item:hover {
            color: var(--primary);
            background: rgba(var(--primary-rgb), .08);
        }
        .nav-item:focus-visible {
            outline: 3px solid rgba(var(--primary-rgb), .35);
            outline-offset: 2px;
        }
        .nav-item.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 6px 20px rgba(var(--primary-rgb), .35);
        }
        .mobile-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border);
            background: var(--surface);
            border-radius: 12px;
            color: var(--text);
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .mobile-toggle:focus-visible {
            outline: 3px solid rgba(var(--primary-rgb), .35);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, .98);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            padding: 1rem 1.2rem 1.4rem;
            z-index: 1040;
            flex-direction: column;
            gap: .4rem;
            box-shadow: 0 20px 40px rgba(0, 0, 0, .06);
        }
        .mobile-menu.show {
            display: flex;
        }
        .mobile-menu a {
            padding: .7rem 1rem;
            border-radius: 14px;
            color: var(--text);
            font-weight: 600;
            font-size: 1rem;
        }
        .mobile-menu a:hover {
            background: rgba(var(--primary-rgb), .06);
            color: var(--primary);
        }
        .mobile-menu a.active {
            background: var(--primary);
            color: #fff;
        }
        .category-hero {
            position: relative;
            padding: 130px 0 100px;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 68, 160, .92) 0%, rgba(13, 110, 253, .82) 50%, rgba(0, 183, 154, .72) 100%);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            color: #fff;
        }
        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: .6rem;
            font-size: .88rem;
            margin-bottom: 1.6rem;
            color: rgba(255, 255, 255, .85);
        }
        .hero-breadcrumb a:hover {
            color: #fff;
        }
        .hero-breadcrumb i {
            font-size: .72rem;
            opacity: .7;
        }
        .category-hero h1 {
            font-size: clamp(2.2rem, 4.5vw, 3.6rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        .category-hero p.lead {
            font-size: clamp(1rem, 1.6vw, 1.2rem);
            max-width: 640px;
            opacity: .95;
            margin-bottom: 1.8rem;
        }
        .hero-badge-group {
            display: flex;
            gap: .8rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }
        .hero-badge {
            background: rgba(255, 255, 255, .16);
            border: 1px solid rgba(255, 255, 255, .24);
            backdrop-filter: blur(6px);
            padding: .4rem .9rem;
            border-radius: 999px;
            font-size: .82rem;
            font-weight: 500;
        }
        .hero-actions {
            display: flex;
            gap: .8rem;
            flex-wrap: wrap;
        }
        .btn-soft {
            display: inline-flex;
            align-items: center;
            gap: .45rem;
            padding: .7rem 1.5rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: .92rem;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .btn-soft-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 30px rgba(255, 255, 255, .2);
        }
        .btn-soft-light:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(var(--primary-rgb), .35);
        }
        .btn-soft-ghost {
            background: rgba(255, 255, 255, .14);
            color: #fff;
            border-color: rgba(255, 255, 255, .35);
        }
        .btn-soft-ghost:hover {
            background: rgba(255, 255, 255, .28);
            color: #fff;
            transform: translateY(-2px);
        }
        .section-padding {
            padding: 100px 0;
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 3.2rem;
        }
        .section-header .eyebrow {
            display: inline-block;
            background: rgba(var(--primary-rgb), .08);
            color: var(--primary);
            font-size: .82rem;
            font-weight: 700;
            letter-spacing: .04em;
            padding: .35rem 1rem;
            border-radius: 999px;
            margin-bottom: .9rem;
        }
        .section-header h2 {
            font-size: clamp(1.7rem, 2.8vw, 2.4rem);
            font-weight: 800;
            margin-bottom: .7rem;
        }
        .section-header p {
            color: var(--muted);
            font-size: 1rem;
        }
        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2rem 1.6rem;
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::after {
            content: "";
            position: absolute;
            top: -40px;
            right: -40px;
            width: 90px;
            height: 90px;
            background: rgba(var(--primary-rgb), .04);
            border-radius: 50%;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(var(--primary-rgb), .25);
        }
        .feature-card:hover::after {
            transform: scale(1.8);
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            font-size: 1.3rem;
            background: rgba(var(--primary-rgb), .1);
            color: var(--primary);
            margin-bottom: 1.2rem;
            position: relative;
            z-index: 1;
        }
        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: .5rem;
            position: relative;
            z-index: 1;
        }
        .feature-card p {
            color: var(--muted);
            font-size: .9rem;
            margin-bottom: 0;
            position: relative;
            z-index: 1;
        }
        .news-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }
        .news-card .card-img-wrap {
            position: relative;
            overflow: hidden;
        }
        .news-card .card-img-wrap img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .news-card:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .news-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(var(--primary-rgb), .9);
            color: #fff;
            padding: .25rem .7rem;
            font-size: .74rem;
            font-weight: 600;
            border-radius: 999px;
            backdrop-filter: blur(4px);
        }
        .news-card .card-body {
            padding: 1.4rem 1.4rem 1.6rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-meta {
            font-size: .78rem;
            color: var(--muted);
            display: flex;
            gap: .8rem;
            margin-bottom: .6rem;
        }
        .news-meta i {
            font-size: .65rem;
        }
        .news-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: .6rem;
        }
        .news-card p {
            color: var(--muted);
            font-size: .88rem;
            margin-bottom: 1rem;
            flex: 1;
        }
        .card-link {
            color: var(--primary);
            font-weight: 600;
            font-size: .85rem;
            display: inline-flex;
            align-items: center;
            gap: .35rem;
        }
        .card-link i {
            transition: transform .3s;
        }
        .card-link:hover i {
            transform: translateX(4px);
        }
        .news-list-section {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .news-list-item {
            display: flex;
            align-items: center;
            gap: 1.4rem;
            padding: 1rem 0;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .news-list-item:last-child {
            border-bottom: none;
        }
        .news-list-item:hover {
            padding-left: .6rem;
        }
        .news-list-item img {
            width: 180px;
            height: 112px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .news-list-content h4 {
            font-size: 1.02rem;
            font-weight: 700;
            margin-bottom: .35rem;
            line-height: 1.4;
        }
        .news-list-content p {
            color: var(--muted);
            font-size: .85rem;
            margin-bottom: .4rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-list-content .list-meta {
            font-size: .78rem;
            color: var(--muted);
            display: flex;
            gap: .8rem;
        }
        .sidebar-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.6rem;
            margin-bottom: 1.4rem;
        }
        .sidebar-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 1.1rem;
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: .5rem;
        }
        .tag-item {
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--muted);
            padding: .3rem .85rem;
            font-size: .8rem;
            border-radius: 999px;
            font-weight: 500;
            transition: var(--transition);
        }
        .tag-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .recommend-item {
            display: flex;
            gap: .8rem;
            padding: .6rem 0;
            align-items: center;
            border-bottom: 1px dashed var(--border);
        }
        .recommend-item:last-child {
            border-bottom: none;
        }
        .recommend-item img {
            width: 64px;
            height: 64px;
            object-fit: cover;
            border-radius: 10px;
            flex-shrink: 0;
        }
        .recommend-item span {
            font-size: .85rem;
            font-weight: 600;
            line-height: 1.4;
        }
        .recommend-item:hover span {
            color: var(--primary);
        }
        .stats-section {
            background: linear-gradient(135deg, #0f1c3d 0%, #1a2c56 100%);
            position: relative;
            overflow: hidden;
            padding: 90px 0;
        }
        .stats-section::before {
            content: "";
            position: absolute;
            right: -100px;
            top: -100px;
            width: 300px;
            height: 300px;
            background: rgba(var(--primary-rgb), .15);
            border-radius: 50%;
        }
        .stats-section::after {
            content: "";
            position: absolute;
            left: -80px;
            bottom: -80px;
            width: 220px;
            height: 220px;
            background: rgba(var(--secondary-rgb), .12);
            border-radius: 50%;
        }
        .stats-section .container {
            position: relative;
            z-index: 2;
        }
        .stats-section .section-header h2 {
            color: #fff;
        }
        .stats-section .section-header .eyebrow {
            background: rgba(255, 255, 255, .12);
            color: #fff;
        }
        .stat-box {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius);
            padding: 2rem 1.4rem;
            text-align: center;
            backdrop-filter: blur(6px);
            transition: var(--transition);
        }
        .stat-box:hover {
            background: rgba(255, 255, 255, .12);
            transform: translateY(-4px);
        }
        .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1;
            margin-bottom: .5rem;
            font-variant-numeric: tabular-nums;
        }
        .stat-label {
            color: rgba(255, 255, 255, .75);
            font-size: .88rem;
        }
        .timeline-wrap {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }
        .timeline-item {
            display: flex;
            gap: 1.4rem;
            margin-bottom: 2rem;
            position: relative;
        }
        .timeline-item::before {
            content: "";
            position: absolute;
            left: 20px;
            top: 48px;
            bottom: -20px;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary), transparent);
        }
        .timeline-item:last-child::before {
            display: none;
        }
        .timeline-dot {
            width: 42px;
            height: 42px;
            background: var(--surface);
            border: 2px solid var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
            z-index: 1;
            font-size: .9rem;
        }
        .timeline-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.3rem 1.6rem;
            flex: 1;
            box-shadow: 0 6px 20px rgba(0, 0, 0, .03);
        }
        .timeline-card .time {
            font-size: .78rem;
            color: var(--secondary);
            font-weight: 700;
        }
        .timeline-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin: .2rem 0 .3rem;
        }
        .timeline-card p {
            font-size: .85rem;
            color: var(--muted);
            margin: 0;
        }
        .faq-section {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .accordion-item {
            background: var(--bg);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius) !important;
            margin-bottom: 1rem;
            overflow: hidden;
        }
        .accordion-button {
            background: var(--bg);
            color: var(--text);
            font-weight: 600;
            font-size: .95rem;
            padding: 1.2rem 1.3rem;
            box-shadow: none !important;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(var(--primary-rgb), .05);
            color: var(--primary);
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(var(--primary-rgb), .3);
        }
        .accordion-body {
            padding: 1rem 1.3rem 1.3rem;
            color: var(--muted);
            font-size: .92rem;
        }
        .cta-section {
            position: relative;
            padding: 100px 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(13, 110, 253, .9), rgba(0, 183, 154, .85));
        }
        .cta-inner {
            position: relative;
            color: #fff;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .cta-inner p {
            font-size: 1rem;
            opacity: .95;
            margin-bottom: 2rem;
        }
        .btn-cta {
            background: #fff;
            color: var(--primary);
            padding: .85rem 2.2rem;
            border-radius: 999px;
            font-weight: 700;
            font-size: .95rem;
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            box-shadow: 0 12px 30px rgba(0, 0, 0, .12);
            transition: var(--transition);
            border: none;
        }
        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 18px 40px rgba(0, 0, 0, .18);
            color: var(--secondary);
        }
        .site-footer {
            background: #0e1a30;
            color: rgba(255, 255, 255, .8);
            padding: 70px 0 0;
            border-top: 3px solid var(--primary);
        }
        .site-footer .header-logo {
            position: static;
            transform: none;
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 1rem;
        }
        .site-footer .header-logo i {
            background: rgba(var(--primary-rgb), .2);
            color: #fff;
        }
        .footer-row {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 3rem;
            padding-bottom: 3rem;
        }
        .footer-brand p {
            font-size: .88rem;
            opacity: .75;
            max-width: 340px;
        }
        .footer-col-title {
            color: #fff;
            font-size: .95rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: .5rem;
        }
        .footer-col a {
            color: rgba(255, 255, 255, .7);
            font-size: .86rem;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 1.4rem 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: .5rem;
            font-size: .8rem;
            opacity: .6;
        }
        .footer-bottom p {
            margin: 0;
        }
        @media (max-width: 991.98px) {
            .header-nav-left,
            .header-nav-right {
                display: none;
            }
            .header-logo {
                position: static;
                transform: none;
                margin: 0 auto;
                font-size: 1.2rem;
            }
            .mobile-toggle {
                display: inline-flex;
                flex-shrink: 0;
            }
            .section-padding {
                padding: 70px 0;
            }
            .news-list-item img {
                width: 130px;
                height: 90px;
            }
            .footer-row {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 767.98px) {
            .category-hero {
                padding: 100px 0 70px;
            }
            .news-list-item {
                flex-direction: column;
                align-items: flex-start;
                gap: .8rem;
                padding: 1.2rem 0;
            }
            .news-list-item img {
                width: 100%;
                height: 180px;
            }
            .footer-row {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .hero-actions,
            .hero-badge-group {
                flex-direction: column;
                align-items: flex-start;
            }
            .btn-soft {
                width: 100%;
                justify-content: center;
            }
            .stats-section {
                padding: 70px 0;
            }
            .stat-box {
                margin-bottom: 1rem;
            }
        }
        @media (max-width: 520px) {
            .header-logo {
                font-size: 1rem;
            }
            .header-logo i {
                width: 1.8rem;
                height: 1.8rem;
                font-size: 1.2rem;
            }
            .mobile-toggle {
                width: 40px;
                height: 40px;
            }
            .section-header h2 {
                font-size: 1.55rem;
            }
            .timeline-item {
                gap: 1rem;
            }
            .timeline-dot {
                width: 34px;
                height: 34px;
                font-size: .75rem;
            }
            .timeline-item::before {
                left: 16px;
            }
            .news-card h3 {
                font-size: 1rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #e63946;
            --primary-dark: #c62230;
            --primary-light: #ff6b6b;
            --dark: #111827;
            --dark-2: #1e293b;
            --bg: #f4f5fa;
            --card-bg: #ffffff;
            --text: #1f2a37;
            --text-2: #6b7280;
            --border: #e8eaf0;
            --gold: #f59e0b;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(17, 24, 39, 0.07);
            --shadow-lg: 0 12px 40px rgba(17, 24, 39, 0.12);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
        }

        .btn {
            --bs-btn-border-radius: 10px;
            font-weight: 600;
        }

        .btn-primary {
            --bs-btn-bg: var(--primary);
            --bs-btn-border-color: var(--primary);
            --bs-btn-hover-bg: var(--primary-dark);
            --bs-btn-hover-border-color: var(--primary-dark);
            --bs-btn-active-bg: var(--primary-dark);
            --bs-btn-active-border-color: var(--primary-dark);
            --bs-btn-focus-shadow-rgb: 230, 57, 70;
        }

        /* ===================== Header ===================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(17, 24, 39, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.15);
            height: 72px;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            position: relative;
            padding: 0 24px;
            max-width: 1320px;
            margin: 0 auto;
        }

        .header-nav-left,
        .header-nav-right {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
        }

        .header-nav-right {
            justify-content: flex-end;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: #ffffff;
            text-decoration: none;
            flex-shrink: 0;
            padding: 8px 20px;
            letter-spacing: 0.5px;
            transition: var(--transition);
        }

        .header-logo:hover {
            color: #fff;
            opacity: 0.9;
        }

        .header-logo i {
            color: var(--primary);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 10px rgba(230, 57, 70, 0.5));
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 18px;
            border-radius: 30px;
            text-decoration: none;
            border: 1px solid transparent;
            transition: var(--transition);
            line-height: 1.4;
        }

        .nav-item:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-1px);
        }

        .nav-item.active {
            color: #ffffff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.4);
        }

        .nav-item.active:hover {
            background: var(--primary-dark);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.35rem;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: background 0.3s;
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1001;
        }

        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            background: rgba(17, 24, 39, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 16px 24px 24px;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
            border-radius: 0 0 20px 20px;
        }

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

        .mobile-menu-link {
            display: block;
            padding: 13px 10px;
            color: rgba(255, 255, 255, 0.85);
            text-decoration: none;
            font-weight: 500;
            font-size: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: color 0.3s, background 0.3s;
            border-radius: 8px;
        }

        .mobile-menu-link:last-child {
            border-bottom: none;
        }

        .mobile-menu-link:hover,
        .mobile-menu-link.active {
            color: #fff;
            background: rgba(230, 57, 70, 0.2);
        }

        /* ===================== Page Banner ===================== */
        .page-banner {
            position: relative;
            padding: 150px 0 64px;
            background:
                linear-gradient(135deg, rgba(17, 24, 39, 0.95) 0%, rgba(17, 24, 39, 0.88) 55%, rgba(230, 57, 70, 0.4) 130%),
                url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            color: #fff;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .breadcrumb-nav {
            margin-bottom: 28px;
        }

        .breadcrumb-nav .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
        }

        .breadcrumb-nav .breadcrumb-item {
            font-size: 0.88rem;
        }

        .breadcrumb-nav .breadcrumb-item a {
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            transition: color 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .breadcrumb-nav .breadcrumb-item a:hover {
            color: #ffffff;
        }

        .breadcrumb-nav .breadcrumb-item.active {
            color: rgba(255, 255, 255, 0.45);
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .breadcrumb-nav .breadcrumb-item + .breadcrumb-item::before {
            color: rgba(255, 255, 255, 0.35);
            content: "›";
            padding: 0 6px;
            font-size: 1.2rem;
            line-height: 1;
        }

        .banner-content {
            max-width: 900px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 18px;
        }

        .badge-cat {
            display: inline-flex;
            align-items: center;
            background: var(--primary);
            color: #fff;
            font-size: 0.78rem;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: 20px;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.35);
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
        }

        .meta-item i {
            font-size: 0.9rem;
        }

        .banner-title {
            font-size: clamp(1.8rem, 3.6vw, 2.9rem);
            font-weight: 800;
            line-height: 1.28;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 24px rgba(0, 0, 0, 0.3);
        }

        .banner-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.72);
            max-width: 760px;
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ===================== Article Section ===================== */
        .article-section {
            padding: 56px 0;
            background: var(--bg);
        }

        .article-card {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 44px 48px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: box-shadow 0.3s;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: #334155;
        }

        .article-content > *:first-child {
            margin-top: 0;
        }

        .article-content p {
            margin-bottom: 1.4rem;
        }

        .article-content h2 {
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--dark);
            margin-top: 2.2rem;
            margin-bottom: 1rem;
            position: relative;
            padding-bottom: 0.5rem;
        }

        .article-content h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
            margin-top: 10px;
        }

        .article-content h3 {
            font-size: 1.28rem;
            font-weight: 600;
            color: var(--dark);
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }

        .article-content h4 {
            font-size: 1.12rem;
            font-weight: 600;
            color: var(--dark);
            margin-top: 1.5rem;
            margin-bottom: 0.6rem;
        }

        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 14px;
            margin: 1.5rem 0;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.4rem;
            padding-left: 1.5rem;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.5rem;
        }

        .article-content ul li::marker {
            color: var(--primary);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: #fff5f5;
            padding: 1.2rem 1.5rem;
            border-radius: 0 14px 14px 0;
            margin: 1.8rem 0;
            font-style: italic;
            color: #4b5563;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--primary-dark);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 10px 14px;
        }

        .article-content table th {
            background: #f0f1f5;
            font-weight: 600;
        }

        .article-tags {
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .article-tag {
            display: inline-block;
            background: #f3f4f8;
            color: var(--text-2);
            font-size: 0.85rem;
            padding: 5px 16px;
            border-radius: 20px;
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .article-tag:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }

        .article-footer {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .share-buttons {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .share-label {
            font-size: 0.9rem;
            color: var(--text-2);
            margin-right: 4px;
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: #f3f4f8;
            color: var(--text-2);
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }

        .share-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
        }

        .share-wechat:hover {
            background: #07c160;
            color: #fff;
        }

        .share-weibo:hover {
            background: #e6162d;
            color: #fff;
        }

        .share-qq:hover {
            background: #12b7f5;
            color: #fff;
        }

        .not-found {
            text-align: center;
            padding: 60px 20px;
        }

        .not-found-icon {
            font-size: 3.6rem;
            color: var(--primary);
            margin-bottom: 18px;
        }

        .not-found h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .not-found p {
            color: var(--text-2);
            margin-bottom: 24px;
        }

        /* ===================== Sidebar ===================== */
        .sidebar-sticky {
            position: sticky;
            top: 96px;
        }

        .sidebar-widget {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 24px;
            border: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(17, 24, 39, 0.05);
            margin-bottom: 24px;
            transition: box-shadow 0.3s;
        }

        .sidebar-widget:hover {
            box-shadow: 0 4px 20px rgba(17, 24, 39, 0.08);
        }

        .sidebar-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dark);
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
            margin-bottom: 18px;
            position: relative;
        }

        .sidebar-title::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 36px;
            height: 2px;
            background: var(--primary);
        }

        .sidebar-search {
            display: flex;
            gap: 10px;
        }

        .sidebar-search .form-control {
            border-radius: 10px;
            border: 1px solid var(--border);
            padding: 10px 16px;
            font-size: 0.9rem;
            background: #f8f9fc;
            transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
        }

        .sidebar-search .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.12);
            background: #fff;
        }

        .sidebar-search .btn-search {
            width: 46px;
            height: 46px;
            border: none;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            font-size: 0.95rem;
        }

        .sidebar-search .btn-search:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.35);
        }

        .sidebar-cat-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-cat-list li {
            margin-bottom: 6px;
        }

        .sidebar-cat-list li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: 12px;
            color: var(--text);
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid transparent;
            font-size: 0.95rem;
        }

        .sidebar-cat-list li a:hover {
            background: #f8f9fd;
            border-color: var(--border);
            transform: translateX(4px);
        }

        .sidebar-cat-list li a i:first-child {
            color: var(--primary);
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
        }

        .cat-arrow {
            margin-left: auto;
            font-size: 0.75rem;
            color: #c0c5d0;
        }

        .sidebar-post-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-post-list li {
            padding: 12px 0;
            border-bottom: 1px solid #f0f1f4;
        }

        .sidebar-post-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-post-list li a {
            display: flex;
            gap: 12px;
            text-decoration: none;
            color: inherit;
        }

        .post-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            margin-top: 9px;
            flex-shrink: 0;
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.15);
        }

        .post-info {
            display: flex;
            flex-direction: column;
            gap: 4px;
            min-width: 0;
        }

        .post-title {
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text);
            line-height: 1.45;
            transition: color 0.3s;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar-post-list li a:hover .post-title {
            color: var(--primary);
        }

        .post-cat {
            font-size: 0.75rem;
            color: var(--text-2);
        }

        .sidebar-cta-card {
            background: linear-gradient(135deg, #111827 0%, #1e293b 90%);
            border-color: transparent;
            color: #fff;
            text-align: center;
            padding: 32px 24px;
            position: relative;
            overflow: hidden;
        }

        .sidebar-cta-card::before {
            content: '';
            position: absolute;
            top: -60%;
            left: -40%;
            width: 140%;
            height: 140%;
            background: radial-gradient(circle at 30% 20%, rgba(230, 57, 70, 0.25) 0%, transparent 60%);
            pointer-events: none;
        }

        .sidebar-cta-card .cta-icon {
            font-size: 2.2rem;
            color: var(--primary-light);
            margin-bottom: 14px;
            position: relative;
        }

        .sidebar-cta-card h3 {
            color: #fff;
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 8px;
            position: relative;
        }

        .sidebar-cta-card p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            margin-bottom: 20px;
            position: relative;
        }

        .sidebar-cta-card .btn {
            position: relative;
        }

        /* ===================== Related Section ===================== */
        .related-section {
            padding: 64px 0;
            background: #ffffff;
        }

        .section-head {
            text-align: center;
            margin-bottom: 44px;
        }

        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 8px;
            position: relative;
            display: inline-block;
        }

        .section-head h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
            margin: 12px auto 0;
        }

        .section-head p {
            color: var(--text-2);
            font-size: 1rem;
        }

        .related-card {
            display: block;
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border);
            overflow: hidden;
            text-decoration: none;
            transition: var(--transition);
            height: 100%;
            box-shadow: 0 2px 8px rgba(17, 24, 39, 0.04);
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(230, 57, 70, 0.2);
        }

        .related-card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: #e2e5ee;
        }

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

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

        .related-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(230, 57, 70, 0.92);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        .related-card-body {
            padding: 20px 20px 24px;
        }

        .related-card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark);
            line-height: 1.4;
            margin-bottom: 8px;
            transition: color 0.3s;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card:hover .related-card-body h3 {
            color: var(--primary);
        }

        .related-card-body p {
            font-size: 0.87rem;
            color: var(--text-2);
            line-height: 1.6;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===================== FAQ Section ===================== */
        .faq-section {
            padding: 64px 0;
            background: var(--bg);
        }

        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: 14px !important;
            overflow: hidden;
            margin-bottom: 14px;
            box-shadow: 0 2px 8px rgba(17, 24, 39, 0.04);
            background: #fff;
        }

        .faq-accordion .accordion-button {
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--dark);
            padding: 18px 24px;
            background: #fff;
            border: none;
            box-shadow: none;
            transition: var(--transition);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: #fff;
            color: var(--primary);
            box-shadow: none;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.12);
            border-color: transparent;
        }

        .faq-accordion .accordion-button::after {
            background-size: 1.2rem;
            transition: transform 0.3s;
        }

        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-2);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* ===================== CTA Section ===================== */
        .cta-banner-section {
            padding: 56px 0;
            background: #ffffff;
        }

        .cta-banner {
            background:
                linear-gradient(120deg, rgba(17, 24, 39, 0.97) 0%, rgba(17, 24, 39, 0.9) 60%, rgba(230, 57, 70, 0.35) 140%),
                url('/assets/images/backpic/back-3.png') center / cover no-repeat;
            border-radius: 24px;
            padding: 60px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(17, 24, 39, 0.25);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(230, 57, 70, 0.25) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
        }

        .cta-content h2 {
            font-size: 2.1rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-btn {
            padding: 14px 38px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
            background: #fff;
            color: var(--dark);
        }

        .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(0, 0, 0, 0.25);
            background: #f3f4f8;
            color: var(--primary);
        }

        /* ===================== Footer ===================== */
        .site-footer {
            background: #0e1322;
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .site-footer .footer-row {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-footer .footer-brand .header-logo {
            color: #ffffff;
            margin-bottom: 14px;
            padding: 0;
        }

        .site-footer .footer-brand p {
            max-width: 380px;
            line-height: 1.7;
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 0;
        }

        .footer-col-title {
            color: #ffffff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 18px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: #ffffff;
            padding-left: 5px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===================== Responsive ===================== */
        @media (max-width: 991.98px) {
            .header-nav-left,
            .header-nav-right {
                display: none;
            }

            .header-inner {
                justify-content: center;
            }

            .header-logo {
                margin: 0;
            }

            .mobile-menu-toggle {
                display: block;
            }

            .sidebar-sticky {
                position: static;
                top: auto;
            }

            .site-footer .footer-row {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 767px) {
            .page-banner {
                padding-top: 112px;
                padding-bottom: 42px;
            }

            .article-section {
                padding: 32px 0;
            }

            .article-card {
                padding: 24px 16px;
                border-radius: 14px;
            }

            .related-section,
            .faq-section,
            .cta-banner-section {
                padding: 40px 0;
            }

            .cta-banner {
                padding: 40px 20px;
                border-radius: 18px;
            }

            .cta-content h2 {
                font-size: 1.6rem;
            }

            .section-head {
                margin-bottom: 28px;
            }

            .section-head h2 {
                font-size: 1.55rem;
            }

            .site-footer {
                padding-top: 40px;
            }

            .site-footer .footer-row {
                grid-template-columns: 1fr;
                gap: 24px;
                padding-bottom: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 575.98px) {
            .page-banner {
                padding-top: 100px;
            }

            .banner-title {
                font-size: 1.55rem;
            }

            .banner-desc {
                font-size: 0.95rem;
            }

            .article-meta {
                gap: 8px;
            }

            .meta-item {
                font-size: 0.78rem;
            }

            .badge-cat {
                font-size: 0.7rem;
                padding: 4px 12px;
            }

            .article-content {
                font-size: 0.98rem;
                line-height: 1.85;
            }

            .article-tags {
                gap: 8px;
            }

            .article-tag {
                font-size: 0.78rem;
                padding: 4px 12px;
            }

            .sidebar-widget {
                padding: 20px 16px;
            }

            .related-card-body {
                padding: 16px;
            }

            .related-card-body h3 {
                font-size: 0.98rem;
            }

            .header-logo {
                font-size: 1.1rem;
                padding: 6px 12px;
            }

            .header-logo i {
                font-size: 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0e2a47;
            --primary-dark: #091c30;
            --primary-light: #1e4a76;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fff4e6;
            --bg: #f0f4f8;
            --card-bg: #ffffff;
            --text: #1e293b;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius: 18px;
            --radius-sm: 12px;
            --shadow: 0 6px 24px rgba(14, 42, 71, .06);
            --shadow-lg: 0 16px 48px rgba(14, 42, 71, .12);
            --spacing: 88px;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .25s;
        }

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

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1220px;
        }

        /* ===== Header ===== */
        .site-header {
            background: var(--primary);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(9, 28, 48, .35);
            border-bottom: 1px solid rgba(255, 255, 255, .06);
        }

        .header-container {
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
            height: 76px;
        }

        .header-nav-left {
            justify-self: start;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .header-nav-right {
            justify-self: end;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .header-logo {
            justify-self: center;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: .5px;
            white-space: nowrap;
            padding: 0 12px;
        }

        .header-logo i {
            color: var(--accent);
            font-size: 22px;
        }

        .header-logo:hover {
            color: #fff;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, .72);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 50rem;
            transition: all .25s;
        }

        .nav-item:hover {
            color: #fff;
            background: rgba(255, 255, 255, .08);
        }

        .nav-item.active {
            color: #fff;
            background: rgba(245, 158, 11, .18);
        }

        .header-toggler {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, .25);
            color: #fff;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            cursor: pointer;
            transition: all .25s;
        }

        .header-toggler:hover {
            background: rgba(255, 255, 255, .1);
            border-color: rgba(255, 255, 255, .4);
        }

        .mobile-menu {
            display: none;
            background: var(--primary);
            padding: 10px 20px 20px;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }

        .mobile-menu.show {
            display: block;
        }

        .mobile-nav-item {
            display: block;
            color: rgba(255, 255, 255, .75);
            font-size: 15px;
            font-weight: 500;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            transition: all .2s;
        }

        .mobile-nav-item:hover,
        .mobile-nav-item.active {
            color: #fff;
            background: rgba(255, 255, 255, .08);
        }

        /* ===== Hero ===== */
        .guide-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(14, 42, 71, .94), rgba(14, 42, 71, .72)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            color: #fff;
            padding: 120px 0 110px;
            text-align: center;
            overflow: hidden;
        }

        .guide-hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 900px;
            height: 180px;
            background: radial-gradient(ellipse at center, rgba(245, 158, 11, .25), transparent 70%);
            pointer-events: none;
        }

        .guide-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 158, 11, .15);
            border: 1px solid rgba(245, 158, 11, .3);
            color: #fbbf24;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50rem;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .guide-hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: 1px;
        }

        .guide-hero p {
            font-size: 17px;
            color: rgba(255, 255, 255, .85);
            max-width: 720px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

        .hero-btns {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-main {
            background: var(--accent);
            border: 2px solid var(--accent);
            color: #fff;
            border-radius: 50rem;
            padding: 12px 30px;
            font-weight: 600;
            font-size: 15px;
            transition: all .3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-main:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(245, 158, 11, .4);
        }

        .btn-outline-light-custom {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, .7);
            color: #fff;
            border-radius: 50rem;
            padding: 12px 30px;
            font-weight: 600;
            font-size: 15px;
            transition: all .3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline-light-custom:hover {
            background: #fff;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(255, 255, 255, .2);
        }

        /* ===== Section base ===== */
        .section {
            padding: var(--spacing) 0;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 54px;
        }

        .section-head .section-tag {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: 50rem;
            letter-spacing: 2px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-head p {
            color: var(--text-weak);
            font-size: 16px;
            line-height: 1.8;
        }

        /* ===== Steps ===== */
        .steps-section {
            background: #fff;
        }

        .step-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 22px;
            height: 100%;
            position: relative;
            transition: all .35s;
        }

        .step-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }

        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 20px;
            transition: all .3s;
        }

        .step-card:hover .step-num {
            background: var(--accent);
            transform: scale(1.1);
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            margin: 0;
        }

        .step-arrow {
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--accent);
            font-size: 14px;
            z-index: 2;
            opacity: .7;
        }

        /* ===== Features ===== */
        .features-section {
            background: var(--bg);
        }

        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            height: 100%;
            transition: all .35s;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-8px);
            border-color: rgba(245, 158, 11, .3);
        }

        .feature-card .feature-img {
            height: 190px;
            overflow: hidden;
            position: relative;
        }

        .feature-card .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s;
        }

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

        .feature-card .feature-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(14, 42, 71, .25));
        }

        .feature-body {
            padding: 24px 24px 26px;
        }

        .feature-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .feature-body p {
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 14px;
            line-height: 1.7;
        }

        .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .badge-custom {
            background: var(--accent-light);
            color: var(--accent-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 50rem;
        }

        /* ===== Tips ===== */
        .tips-section {
            background: #fff;
        }

        .tips-wrap {
            border-radius: 24px;
            background: linear-gradient(135deg, rgba(14, 42, 71, .03), rgba(245, 158, 11, .05));
            border: 1px solid var(--border);
            overflow: hidden;
            display: flex;
            align-items: center;
        }

        .tips-content {
            padding: 48px 48px;
            flex: 1;
        }

        .tips-content .section-tag {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: 50rem;
            letter-spacing: 2px;
            margin-bottom: 16px;
        }

        .tips-content h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .tips-content p {
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .tips-list {
            list-style: none;
            padding: 0;
            margin: 0 0 28px;
        }

        .tips-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--text);
        }

        .tips-list li i {
            color: var(--accent);
            margin-top: 4px;
            font-size: 15px;
            flex-shrink: 0;
        }

        .tips-media {
            flex: 1;
            min-height: 300px;
            position: relative;
        }

        .tips-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 300px;
        }

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

        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .accordion-custom {
            border: none;
            background: transparent;
        }

        .accordion-custom .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .accordion-custom .accordion-button {
            background: var(--card-bg);
            color: var(--text);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 24px;
            box-shadow: none;
            border: none;
            transition: color .2s;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--primary);
            color: #fff;
            box-shadow: none;
        }

        .accordion-custom .accordion-button:not(.collapsed)::after {
            filter: brightness(0) invert(1);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(245, 158, 11, .2);
            border-color: transparent;
        }

        .accordion-custom .accordion-body {
            padding: 4px 24px 22px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.8;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, var(--primary-light) 100%);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(245, 158, 11, .1);
            top: -180px;
            right: -120px;
        }

        .cta-inner {
            text-align: center;
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, .75);
            font-size: 16px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .cta-btns {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-light-custom {
            background: #fff;
            border: 2px solid #fff;
            color: var(--primary);
            border-radius: 50rem;
            padding: 12px 30px;
            font-weight: 700;
            font-size: 15px;
            transition: all .3s;
        }

        .btn-light-custom:hover {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(245, 158, 11, .35);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, .7);
            padding: 64px 0 0;
        }

        .footer-row {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-brand .header-logo {
            justify-self: start;
            color: #fff;
            font-size: 20px;
            margin-bottom: 14px;
            padding: 0;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 320px;
            margin: 0;
        }

        .footer-col-title {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 1px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            transition: all .2s;
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .header-container {
                display: flex;
                justify-content: space-between;
                height: 64px;
            }

            .header-logo {
                font-size: 17px;
                padding: 0;
            }

            .header-logo i {
                font-size: 18px;
            }

            .guide-hero {
                padding: 80px 0 70px;
            }

            .guide-hero h1 {
                font-size: 34px;
            }

            .guide-hero p {
                font-size: 15px;
            }

            .section {
                padding: 60px 0;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .tips-wrap {
                flex-direction: column-reverse;
            }

            .tips-content {
                padding: 32px 24px;
            }

            .tips-media,
            .tips-media img {
                width: 100%;
                min-height: 220px;
            }

            .footer-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 767.98px) {
            .guide-hero h1 {
                font-size: 28px;
            }

            .guide-hero p {
                font-size: 14px;
            }

            .step-arrow {
                display: none;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .feature-card .feature-img {
                height: 160px;
            }

            .cta-section {
                padding: 60px 0;
            }

            .cta-inner h2 {
                font-size: 26px;
            }
        }

        @media (max-width: 575.98px) {
            .hero-btns .btn-main,
            .hero-btns .btn-outline-light-custom {
                width: 100%;
                justify-content: center;
            }

            .guide-hero {
                padding: 60px 0 50px;
            }

            .header-logo {
                font-size: 15px;
            }

            .footer-col ul li a {
                font-size: 13px;
            }
        }