/* roulang page: index */
:root {
            --bs-body-bg: #f2f5fb;
            --bs-body-color: #1d2733;
            --primary: #0f1f3f;
            --primary-light: #1a3a85;
            --accent: #00b8d9;
            --accent-2: #f7b731;
            --bs-primary: var(--primary);
            --bs-primary-rgb: 15, 31, 63;
            --bs-link-color-rgb: 0, 184, 217;
            --surface: #ffffff;
            --surface-2: #f8fafc;
            --text-muted: #64748b;
            --border-light: #e9eef3;
            --shadow-sm: 0 1px 2px rgba(15, 31, 63, 0.05), 0 4px 14px rgba(15, 31, 63, 0.04);
            --shadow-md: 0 2px 4px rgba(15, 31, 63, 0.05), 0 12px 28px rgba(15, 31, 63, 0.07);
            --shadow-lg: 0 8px 24px rgba(15, 31, 63, 0.1), 0 20px 40px rgba(15, 31, 63, 0.08);
            --radius: 18px;
            --radius-sm: 12px;
            --transition: 0.25s ease;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }
        *, *::before, *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-sans);
            background: var(--bs-body-bg);
            color: var(--bs-body-color);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        button, input, select, textarea {
            font-family: inherit;
        }
        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .container-sm {
            max-width: 960px;
        }
        /* ============ TOPBAR ============ */
        .topbar {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.88);
            font-size: 13px;
            padding: 9px 0;
        }
        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .topbar-info {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .topbar-info i {
            color: var(--accent-2);
        }
        .topbar-right a {
            color: rgba(255, 255, 255, 0.88);
            border: 1px solid rgba(255, 255, 255, 0.24);
            padding: 3px 14px;
            border-radius: 999px;
            transition: background var(--transition);
            font-weight: 500;
        }
        .topbar-right a:hover {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
        }
        /* ============ HEADER / NAV ============ */
        .site-header {
            background: var(--surface);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1030;
            box-shadow: 0 1px 8px rgba(20, 29, 58, 0.04);
        }
        .navbar-area {
            padding: 12px 0;
        }
        .navbar-area .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.3px;
        }
        .brand-logo .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--accent), var(--primary-light));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 6px 14px rgba(0, 184, 217, 0.3);
            flex-shrink: 0;
        }
        .brand-name {
            line-height: 1.2;
        }
        .brand-name small {
            display: block;
            font-size: 11px;
            font-weight: 500;
            letter-spacing: 1px;
            color: var(--text-muted);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .main-nav a {
            padding: 9px 18px;
            border-radius: 999px;
            font-weight: 600;
            color: var(--primary);
            font-size: 15px;
            transition: all var(--transition);
        }
        .main-nav a:hover {
            background: rgba(0, 184, 217, 0.1);
            color: var(--accent);
        }
        .main-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(15, 31, 63, 0.22);
        }
        .nav-cta {
            background: linear-gradient(135deg, var(--accent), #0288a6) !important;
            color: #fff !important;
            padding: 9px 22px !important;
            border-radius: 999px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(0, 184, 217, 0.35);
        }
        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(0, 184, 217, 0.4);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 26px;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
        }
        @media (max-width: 991px) {
            .nav-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--surface);
                flex-direction: column;
                padding: 16px 24px 24px;
                box-shadow: 0 20px 30px rgba(0, 0, 0, 0.13);
                border-top: 1px solid var(--border-light);
                gap: 4px;
                align-items: stretch;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .nav-cta {
                text-align: center;
            }
        }
        /* ============ HERO ============ */
        .hero {
            position: relative;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 90px 0 110px;
            overflow: hidden;
            isolation: isolate;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(105deg, rgba(15, 31, 63, 0.94) 0%, rgba(15, 31, 63, 0.75) 55%, rgba(0, 184, 217, 0.35) 100%);
            z-index: -1;
        }
        .hero-content {
            max-width: 680px;
            color: #fff;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.22);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 22px;
            backdrop-filter: blur(4px);
        }
        .hero-title {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-title span {
            color: var(--accent-2);
        }
        .hero-subtitle {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 34px;
            max-width: 560px;
        }
        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 40px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 14px 30px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            letter-spacing: 0.3px;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(0, 184, 217, 0.5);
            outline-offset: 2px;
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #008aa8);
            color: #fff;
            box-shadow: 0 8px 20px rgba(0, 184, 217, 0.35);
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 26px rgba(0, 184, 217, 0.42);
            color: #fff;
        }
        .btn-outline-light {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.35);
            backdrop-filter: blur(4px);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
        }
        .hero-meta i {
            color: var(--accent-2);
            margin-right: 6px;
        }
        .hero-stats {
            position: absolute;
            bottom: 0;
            right: 0;
            left: 0;
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(10px);
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 18px 0;
        }
        .hero-stats .container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .stat-item {
            text-align: center;
            color: #fff;
        }
        .stat-number {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 13px;
            opacity: 0.78;
        }
        @media (max-width: 767px) {
            .hero-title {
                font-size: 32px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero {
                padding: 60px 0 90px;
            }
            .hero-stats .container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        /* ============ SECTION BASE ============ */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 50px;
        }
        .section-header .eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            margin: 6px 0 14px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 17px;
            line-height: 1.7;
        }
        @media (max-width: 767px) {
            .section {
                padding: 50px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
        }
        /* ============ INTRO / CORE ============ */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .intro-media {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .intro-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 360px;
        }
        .intro-media-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(15, 31, 63, 0.75));
            padding: 30px 28px 22px;
            color: #fff;
        }
        .intro-media-overlay .badge-date {
            background: var(--accent-2);
            color: var(--primary);
            font-weight: 700;
            font-size: 13px;
            padding: 4px 14px;
            border-radius: 999px;
            display: inline-block;
            margin-bottom: 8px;
        }
        .intro-media-overlay h3 {
            font-size: 18px;
            margin: 0;
            font-weight: 700;
        }
        .intro-text .lead-text {
            font-size: 18px;
            line-height: 1.75;
            color: var(--primary);
            font-weight: 500;
            margin-bottom: 18px;
        }
        .intro-text p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 18px;
        }
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 24px 0 10px;
        }
        .feature-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .feature-list li:last-child {
            border-bottom: none;
        }
        .feature-list .icon {
            width: 38px;
            height: 38px;
            background: rgba(0, 184, 217, 0.12);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            flex-shrink: 0;
        }
        .feature-list .text h4 {
            margin: 0 0 3px;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
        }
        .feature-list .text p {
            margin: 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        @media (max-width: 991px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }
        /* ============ CATEGORY CARDS ============ */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            background: var(--surface);
            transition: transform var(--transition), box-shadow var(--transition);
            color: var(--primary);
            border: 1px solid var(--border-light);
            display: block;
        }
        .category-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            color: var(--primary);
        }
        .category-card .card-img {
            height: 210px;
            overflow: hidden;
            position: relative;
        }
        .category-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .category-card:hover .card-img img {
            transform: scale(1.05);
        }
        .category-card .card-img .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 999px;
            backdrop-filter: blur(4px);
        }
        .category-card .card-body {
            padding: 22px 22px 24px;
        }
        .category-card .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 700;
            font-size: 14px;
            color: var(--accent);
        }
        @media (max-width: 991px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 575px) {
            .category-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ============ CONTENT LIST ============ */
        .content-section {
            background: var(--surface);
            padding: 80px 0;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .content-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .content-item {
            background: var(--surface-2);
            border-radius: var(--radius-sm);
            padding: 24px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            gap: 18px;
        }
        .content-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .content-item .index {
            font-size: 30px;
            font-weight: 800;
            color: rgba(0, 184, 217, 0.2);
            line-height: 1;
            flex-shrink: 0;
        }
        .content-item .item-info {
            flex: 1;
        }
        .content-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .content-meta .badge-cat {
            background: rgba(0, 184, 217, 0.12);
            color: var(--accent);
            padding: 3px 12px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 12px;
        }
        .content-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .content-item h3 a {
            color: var(--primary);
        }
        .content-item h3 a:hover {
            color: var(--accent);
        }
        .content-item p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .content-item .read-more {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .empty-tip {
            text-align: center;
            padding: 40px;
            color: var(--text-muted);
            background: var(--surface-2);
            border-radius: var(--radius);
        }
        @media (max-width: 767px) {
            .content-list {
                grid-template-columns: 1fr;
            }
        }
        /* ============ HOW-TO / STEPS ============ */
        .steps-section {
            background: linear-gradient(180deg, #f8fafc 0%, #eef3fb 100%);
        }
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            margin-top: 20px;
        }
        .step-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 28px 22px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .step-num {
            width: 44px;
            height: 44px;
            margin: 0 auto 16px;
            background: var(--primary);
            color: #fff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
        }
        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        @media (max-width: 991px) {
            .steps-container {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 575px) {
            .steps-container {
                grid-template-columns: 1fr;
            }
        }
        /* ============ FEATURES / GAME INTRO ============ */
        .game-features {
            background: var(--primary);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .game-features::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
        }
        .game-features .section-header h2 {
            color: #fff;
        }
        .game-features .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }
        .game-features .section-header .eyebrow {
            color: var(--accent-2);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            padding: 28px 24px;
            backdrop-filter: blur(6px);
            transition: all var(--transition);
        }
        .feature-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(0, 184, 217, 0.4);
            transform: translateY(-3px);
        }
        .feature-card .icon {
            font-size: 30px;
            color: var(--accent-2);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.72);
            line-height: 1.75;
        }
        @media (max-width: 991px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 575px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ============ FAQ ============ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 184, 217, 0.3);
        }
        .faq-item summary {
            padding: 20px 24px;
            font-weight: 700;
            font-size: 16px;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--accent);
            transition: transform 0.3s;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
        }
        /* ============ CTA ============ */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            padding: 70px 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 220px;
            height: 220px;
            background: rgba(247, 183, 49, 0.1);
            border-radius: 50%;
        }
        .cta-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            z-index: 1;
        }
        .cta-text h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-text p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            margin: 0;
            max-width: 560px;
        }
        .cta-btn-group {
            display: flex;
            gap: 14px;
            flex-shrink: 0;
        }
        .btn-gold {
            background: linear-gradient(135deg, var(--accent-2), #e09400);
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(247, 183, 49, 0.35);
        }
        .btn-gold:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(247, 183, 49, 0.47);
            color: var(--primary);
        }
        .btn-ghost-light {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.25);
        }
        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, 0.24);
            color: #fff;
        }
        @media (max-width: 991px) {
            .cta-wrap {
                flex-direction: column;
                text-align: center;
            }
            .cta-btn-group {
                justify-content: center;
            }
        }
        @media (max-width: 575px) {
            .cta-btn-group {
                flex-direction: column;
                width: 100%;
            }
            .cta-btn-group .btn {
                justify-content: center;
            }
            .cta-text h2 {
                font-size: 26px;
            }
        }
        /* ============ FOOTER ============ */
        .site-footer {
            background: #0c1526;
            color: rgba(255, 255, 255, 0.6);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .brand-logo small {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            max-width: 340px;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
        }
        @media (max-width: 767px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        a:focus-visible {
            outline: 3px solid rgba(0, 184, 217, 0.5);
            outline-offset: 2px;
        }
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            box-shadow: var(--shadow-md);
            opacity: 0;
            visibility: hidden;
            transition: all var(--transition);
            border: none;
            z-index: 999;
        }
        .scroll-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .scroll-top:hover {
            background: var(--accent);
            transform: translateY(-3px);
        }
        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .brand-name {
                font-size: 18px;
            }
        }

/* roulang page: category1 */
:root{
  --c-primary:#0a5cff;
  --c-primary-deep:#0743b8;
  --c-ice:#00c6ff;
  --c-ice-soft:#e6f4ff;
  --c-dark:#0b1526;
  --c-dark-2:#101d35;
  --c-text:#1b2536;
  --c-text-soft:#5b6b82;
  --c-bg:#f4f8fe;
  --c-white:#ffffff;
  --c-border:#e2ebf6;
  --c-shadow:0 8px 28px rgba(9,62,150,.08);
  --c-shadow-lg:0 16px 44px rgba(9,62,150,.14);
  --radius:16px;
  --radius-sm:10px;
  --radius-pill:40px;
  --header-h:76px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--c-bg);
  color:var(--c-text);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit;transition:color .25s ease}
a:hover{text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select{font-family:inherit;font-size:inherit}
:focus-visible{outline:3px solid rgba(10,92,255,.4);outline-offset:2px;border-radius:4px}
.container{max-width:1200px}
/* ========== Header ========== */
.site-header{
  background:var(--c-dark);
  min-height:var(--header-h);
  display:flex;
  align-items:center;
  position:sticky;
  top:0;
  z-index:1050;
  border-bottom:1px solid rgba(255,255,255,.06);
  box-shadow:0 4px 20px rgba(0,0,0,.25);
}
.navbar-area{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:12px 24px;
  width:100%;
}
.brand-logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{
  width:42px;height:42px;border-radius:12px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-ice));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:20px;
  box-shadow:0 4px 14px rgba(10,92,255,.35);
}
.brand-name{
  color:#fff;font-size:20px;font-weight:800;letter-spacing:.6px;
  line-height:1.25;display:flex;flex-direction:column;
}
.brand-name small{font-size:12px;font-weight:400;color:rgba(255,255,255,.5);letter-spacing:1.6px}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{
  color:rgba(255,255,255,.72);
  font-size:15px;
  font-weight:500;
  padding:9px 18px;
  border-radius:var(--radius-pill);
  transition:all .25s ease;
  display:inline-flex;
  align-items:center;
  gap:7px;
}
.main-nav a i{font-size:14px;opacity:.8}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.08)}
.main-nav a.active{background:linear-gradient(135deg,var(--c-primary),var(--c-ice));color:#fff;box-shadow:0 4px 16px rgba(10,92,255,.35)}
.nav-cta{
  background:rgba(0,198,255,.14);
  border:1px solid rgba(0,198,255,.35);
  color:#7fdcff !important;
  margin-left:6px;
}
.nav-cta:hover{background:rgba(0,198,255,.26);color:#fff !important;border-color:rgba(0,198,255,.65)}
.nav-toggle{
  display:none;
  background:transparent;
  border:1px solid rgba(255,255,255,.15);
  border-radius:10px;
  color:#fff;
  width:44px;height:44px;
  font-size:20px;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition:all .25s ease;
}
.nav-toggle:hover{background:rgba(255,255,255,.1)}
/* ========== Category Banner ========== */
.cat-banner{
  position:relative;
  padding:110px 0 90px;
  background:linear-gradient(180deg,var(--c-dark) 0%,var(--c-dark-2) 100%);
  overflow:hidden;
  text-align:center;
  color:#fff;
}
.cat-banner::before{
  content:"";
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:.32;
}
.cat-banner::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(11,21,38,.55) 0%,rgba(11,21,38,.85) 100%);
}
.cat-banner .container{position:relative;z-index:2}
.cat-breadcrumb{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.16);
  backdrop-filter:blur(8px);
  border-radius:var(--radius-pill);
  padding:6px 18px;
  font-size:13px;
  color:rgba(255,255,255,.7);
  margin-bottom:22px;
}
.cat-breadcrumb a{color:rgba(255,255,255,.8)}
.cat-breadcrumb a:hover{color:var(--c-ice)}
.cat-banner h1{
  font-size:42px;
  font-weight:800;
  letter-spacing:1px;
  margin:0 0 16px;
  line-height:1.3;
}
.cat-banner .lead{
  font-size:17px;
  color:rgba(255,255,255,.75);
  max-width:720px;
  margin:0 auto 30px;
  line-height:1.8;
}
.cat-badge-row{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:12px;
  margin-top:20px;
}
.cat-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(0,198,255,.12);
  border:1px solid rgba(0,198,255,.35);
  color:#9de5ff;
  font-size:14px;
  font-weight:500;
  padding:8px 18px;
  border-radius:var(--radius-pill);
}
.cat-badge i{font-size:13px}
/* ========== Section Base ========== */
.section{padding:88px 0}
.section-alt{background:#fff}
.section-head{max-width:680px;margin:0 auto 48px;text-align:center}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--c-primary);
  font-size:13px;
  font-weight:700;
  letter-spacing:2px;
  text-transform:uppercase;
  margin-bottom:10px;
}
.section-head .eyebrow i{font-size:14px}
.section-head h2{font-size:32px;font-weight:800;color:var(--c-dark);margin:0 0 12px;line-height:1.35}
.section-head p{font-size:16px;color:var(--c-text-soft);margin:0;line-height:1.8}
/* ========== Intro / Key Points ========== */
.key-card{
  background:var(--c-white);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:32px 28px;
  height:100%;
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
  position:relative;
  overflow:hidden;
}
.key-card::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:4px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-ice));
  opacity:0;
  transition:opacity .3s ease;
}
.key-card:hover{transform:translateY(-6px);box-shadow:var(--c-shadow-lg);border-color:#cfddff}
.key-card:hover::before{opacity:1}
.key-card .key-icon{
  width:58px;height:58px;
  border-radius:14px;
  background:var(--c-ice-soft);
  color:var(--c-primary);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:24px;
  margin-bottom:18px;
}
.key-card h3{font-size:19px;font-weight:700;margin:0 0 10px;color:var(--c-dark)}
.key-card p{font-size:14.5px;color:var(--c-text-soft);margin:0;line-height:1.75}
/* ========== Steps ========== */
.steps-wrap{position:relative}
.steps-wrap::before{
  content:"";
  position:absolute;
  top:34px;left:0;right:0;
  height:2px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-ice));
  opacity:.2;
}
.step-card{
  text-align:center;
  padding:0 16px;
  position:relative;
  z-index:2;
}
.step-num{
  width:68px;height:68px;
  margin:0 auto 18px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--c-primary),var(--c-ice));
  color:#fff;
  font-size:24px;
  font-weight:800;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 8px 24px rgba(10,92,255,.3);
}
.step-card h3{font-size:18px;font-weight:700;margin:0 0 10px;color:var(--c-dark)}
.step-card p{font-size:14px;color:var(--c-text-soft);margin:0 auto;max-width:240px;line-height:1.7}
/* ========== Entry Cards ========== */
.entry-card{
  background:var(--c-white);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  overflow:hidden;
  height:100%;
  display:flex;
  flex-direction:column;
  transition:transform .3s ease,box-shadow .3s ease;
}
.entry-card:hover{transform:translateY(-6px);box-shadow:var(--c-shadow-lg)}
.entry-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--c-dark)}
.entry-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.entry-card:hover .entry-cover img{transform:scale(1.05)}
.entry-cover::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 45%,rgba(11,21,38,.6));
}
.entry-tag{
  position:absolute;
  top:14px;left:14px;
  z-index:2;
  background:rgba(255,255,255,.16);
  backdrop-filter:blur(6px);
  border:1px solid rgba(255,255,255,.25);
  color:#fff;
  font-size:12px;
  font-weight:600;
  padding:4px 12px;
  border-radius:var(--radius-pill);
}
.entry-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.entry-body h3{font-size:18px;font-weight:700;color:var(--c-dark);margin:0 0 10px;line-height:1.5}
.entry-body p{font-size:14px;color:var(--c-text-soft);margin:0 0 16px;line-height:1.75;flex:1}
.entry-meta{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding-top:14px;
  border-top:1px solid var(--c-border);
  font-size:13px;
  color:var(--c-text-soft);
}
.entry-meta .btn{
  background:linear-gradient(135deg,var(--c-primary),var(--c-ice));
  color:#fff;
  border:none;
  border-radius:var(--radius-pill);
  font-size:13px;
  font-weight:600;
  padding:6px 16px;
  transition:all .25s ease;
}
.entry-meta .btn:hover{box-shadow:0 4px 14px rgba(10,92,255,.4);transform:translateY(-1px)}
/* ========== List Card ========== */
.list-card{
  display:flex;
  align-items:center;
  gap:20px;
  background:var(--c-white);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  padding:20px 24px;
  margin-bottom:16px;
  transition:all .28s ease;
}
.list-card:hover{border-color:#c9dcff;box-shadow:var(--c-shadow);transform:translateX(4px)}
.list-num{
  font-size:22px;
  font-weight:800;
  color:var(--c-ice);
  background:var(--c-ice-soft);
  min-width:48px;height:48px;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.list-card h3{font-size:17px;font-weight:700;margin:0 0 4px;color:var(--c-dark)}
.list-card p{font-size:14px;color:var(--c-text-soft);margin:0;line-height:1.6}
.list-arrow{margin-left:auto;color:#b6c6da;font-size:16px;flex-shrink:0}
.list-card:hover .list-arrow{color:var(--c-primary)}
/* ========== FAQ ========== */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:var(--c-white);
  border:1px solid var(--c-border);
  border-radius:var(--radius);
  margin-bottom:14px;
  overflow:hidden;
  transition:box-shadow .3s ease,border-color .3s ease;
}
.faq-item:hover{border-color:#c9dcff;box-shadow:var(--c-shadow)}
.faq-q{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  padding:20px 26px;
  cursor:pointer;
  font-size:16px;
  font-weight:600;
  color:var(--c-dark);
}
.faq-q i{
  color:var(--c-primary);
  font-size:15px;
  transition:transform .3s ease;
  flex-shrink:0;
}
.faq-item.open .faq-q i{transform:rotate(180deg)}
.faq-a{
  padding:0 26px;
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease,padding .35s ease;
  font-size:14.5px;
  color:var(--c-text-soft);
  line-height:1.8;
  border-top:0 solid var(--c-border);
}
.faq-item.open .faq-a{
  max-height:280px;
  padding:0 26px 22px;
  border-top-width:1px;
}
/* ========== CTA ========== */
.cta-band{
  background:linear-gradient(135deg,var(--c-dark) 0%,var(--c-dark-2) 60%,#0d2f66 100%);
  padding:70px 0;
  position:relative;
  overflow:hidden;
  color:#fff;
  text-align:center;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity:.18;
}
.cta-band .container{position:relative;z-index:2}
.cta-band h2{font-size:30px;font-weight:800;margin:0 0 14px}
.cta-band p{font-size:16px;color:rgba(255,255,255,.7);max-width:600px;margin:0 auto 28px}
.btn-cta{
  display:inline-flex;
  align-items:center;
  gap:10px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-ice));
  color:#fff;
  border:none;
  border-radius:var(--radius-pill);
  font-size:16px;
  font-weight:700;
  padding:14px 36px;
  box-shadow:0 8px 24px rgba(10,92,255,.4);
  transition:all .3s ease;
}
.btn-cta:hover{color:#fff;transform:translateY(-3px);box-shadow:0 14px 32px rgba(10,92,255,.5)}
.btn-outline-light-mg{
  display:inline-flex;
  align-items:center;
  gap:10px;
  background:transparent;
  border:1px solid rgba(255,255,255,.35);
  color:rgba(255,255,255,.85);
  border-radius:var(--radius-pill);
  font-size:15px;
  font-weight:600;
  padding:13px 30px;
  margin-left:12px;
  transition:all .3s ease;
}
.btn-outline-light-mg:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff}
/* ========== Footer ========== */
.site-footer{background:var(--c-dark);color:rgba(255,255,255,.65);padding:64px 0 28px;border-top:1px solid rgba(255,255,255,.06)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:44px;margin-bottom:44px}
.footer-brand .brand-logo{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.55);margin:14px 0 0;max-width:340px}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.5px;position:relative;padding-bottom:10px}
.footer-title::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:linear-gradient(90deg,var(--c-primary),var(--c-ice));border-radius:2px}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.6);display:inline-flex;align-items:center;gap:6px;transition:all .25s ease}
.footer-links a i{font-size:12px;color:var(--c-ice);opacity:.7}
.footer-links a:hover{color:#fff;transform:translateX(4px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding-top:24px;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  font-size:13px;
  color:rgba(255,255,255,.38);
}
/* ========== Responsive ========== */
@media (max-width:992px){
  .cat-banner h1{font-size:34px}
  .section{padding:64px 0}
  .steps-wrap::before{display:none}
  .step-card{margin-bottom:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:768px){
  .navbar-area{flex-wrap:wrap;padding:12px 16px}
  .nav-toggle{display:flex}
  .main-nav{
    display:none;
    width:100%;
    flex-direction:column;
    align-items:stretch;
    gap:8px;
    padding:16px 0 8px;
    border-top:1px solid rgba(255,255,255,.1);
    margin-top:8px;
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 18px;font-size:15px}
  .nav-cta{margin-left:0;text-align:center}
  .cat-banner{padding:76px 0 60px}
  .cat-banner h1{font-size:28px}
  .section-head h2{font-size:26px}
  .cat-badge-row{gap:8px}
  .cat-badge{padding:6px 14px;font-size:13px}
  .entry-card{margin-bottom:20px}
  .cta-band{padding:52px 0}
  .cta-band h2{font-size:24px}
  .btn-cta,.btn-outline-light-mg{margin:6px;padding:13px 26px;font-size:15px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
}
@media (max-width:520px){
  .cat-banner h1{font-size:23px}
  .cat-banner .lead{font-size:15px}
  .section-head h2{font-size:22px}
  .key-card{padding:24px 20px}
  .list-card{flex-wrap:wrap;gap:12px;padding:16px}
  .list-arrow{display:none}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a{padding:0 18px}
  .faq-item.open .faq-a{padding:0 18px 18px}
}

/* roulang page: article */
:root {
            --primary: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --accent: #06b6d4;
            --bg: #f4f7fc;
            --bg-white: #ffffff;
            --text-main: #0f172a;
            --text-muted: #5b6b8c;
            --border: #e2e8f0;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 12px 32px rgba(29, 78, 216, 0.08);
            --shadow-hover: 0 20px 44px rgba(29, 78, 216, 0.14);
            --header-h: 76px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s, background .25s, box-shadow .25s, transform .25s;
        }

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

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        .btn {
            border-radius: 999px;
            padding: 10px 26px;
            font-size: 15px;
            font-weight: 600;
            transition: all .25s ease;
            border: 2px solid transparent;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            line-height: 1.6;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 6px 18px rgba(29, 78, 216, .22);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 10px 24px rgba(29, 78, 216, .3);
        }

        .btn-outline {
            background: transparent;
            border-color: var(--border);
            color: var(--text-main);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(29, 78, 216, .04);
            transform: translateY(-2px);
        }

        .site-header {
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 4px 18px rgba(15, 23, 42, .04);
        }

        .navbar-area {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            gap: 20px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            color: var(--text-main);
            font-size: 22px;
            line-height: 1.15;
        }

        .brand-logo:hover {
            color: var(--primary);
        }

        .logo-icon {
            width: 44px;
            height: 44px;
            border-radius: 13px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 8px 18px rgba(29, 78, 216, .25);
        }

        .brand-name {
            font-size: 22px;
            letter-spacing: -.02em;
        }

        .brand-name small {
            display: block;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-muted);
            letter-spacing: .06em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .main-nav a {
            padding: 8px 16px;
            border-radius: 999px;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 7px;
            transition: all .25s;
            white-space: nowrap;
        }

        .main-nav a i {
            font-size: 14px;
            opacity: .82;
        }

        .main-nav a:hover {
            color: var(--primary);
            background: rgba(29, 78, 216, .06);
        }

        .main-nav a.active {
            color: var(--primary);
            background: rgba(29, 78, 216, .1);
        }

        .main-nav a.nav-cta {
            background: linear-gradient(135deg, var(--primary), #2563eb);
            color: #fff;
            border: none;
            box-shadow: 0 6px 18px rgba(29, 78, 216, .3);
            padding: 8px 20px;
        }

        .main-nav a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 22px rgba(29, 78, 216, .4);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-main);
            cursor: pointer;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            transition: background .25s;
        }

        .nav-toggle:hover {
            background: rgba(29, 78, 216, .06);
        }

        .article-hero {
            position: relative;
            padding: 84px 0 72px;
            background-size: cover;
            background-position: center;
            color: #fff;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(15, 23, 42, .82) 0%, rgba(15, 23, 42, .55) 55%, rgba(29, 78, 216, .45) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 880px;
        }

        .breadcrumb-nav {
            font-size: 14px;
            margin-bottom: 18px;
            color: rgba(255, 255, 255, .72);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: rgba(255, 255, 255, .78);
            border-bottom: 1px solid transparent;
        }

        .breadcrumb-nav a:hover {
            color: #fff;
            border-bottom-color: #fff;
        }

        .breadcrumb-nav .sep {
            opacity: .5;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .16);
            border: 1px solid rgba(255, 255, 255, .25);
            backdrop-filter: blur(10px);
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: .02em;
            margin-bottom: 18px;
        }

        .hero-title {
            font-size: clamp(1.75rem, 4vw, 2.8rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -.02em;
            text-shadow: 0 2px 16px rgba(0, 0, 0, .18);
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
        }

        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .hero-meta i {
            opacity: .8;
        }

        .article-section {
            padding: 56px 0 64px;
            background: var(--bg);
            position: relative;
        }

        .article-shell {
            max-width: 880px;
            margin: 0 auto;
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 44px 52px 50px;
            margin-top: -58px;
            position: relative;
            z-index: 3;
            border: 1px solid rgba(226, 232, 240, .6);
        }

        .article-meta-top {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            margin-bottom: 28px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
        }

        .badge-cat {
            background: rgba(29, 78, 216, .1);
            color: var(--primary);
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .meta-item {
            color: var(--text-muted);
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-body {
            font-size: 1.06rem;
            line-height: 1.95;
            color: #1f2a44;
        }

        .article-body p {
            margin-bottom: 1.5rem;
        }

        .article-body h2 {
            font-size: 1.55rem;
            font-weight: 800;
            color: var(--text-main);
            margin: 2.4rem 0 1rem;
            letter-spacing: -.01em;
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin: 2rem 0 .8rem;
            color: var(--text-main);
        }

        .article-body img {
            border-radius: 16px;
            margin: 1.6rem 0;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: #f0f4ff;
            padding: 14px 22px;
            border-radius: 0 14px 14px 0;
            margin: 1.8rem 0;
            color: var(--text-muted);
        }

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

        .article-body li {
            margin-bottom: .65rem;
        }

        .article-body a {
            color: var(--primary);
            border-bottom: 1px solid rgba(29, 78, 216, .3);
        }

        .article-body a:hover {
            color: var(--primary-dark);
            border-bottom-color: var(--primary-dark);
        }

        .article-body img+em {
            font-size: 13px;
            color: var(--text-muted);
            display: block;
            text-align: center;
            margin-top: -1rem;
            margin-bottom: 1.5rem;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 22px;
            border-top: 1px solid var(--border);
        }

        .badge-tag {
            background: var(--bg);
            color: var(--text-muted);
            border: 1px solid var(--border);
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            transition: all .25s;
            cursor: default;
        }

        .badge-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(29, 78, 216, .04);
        }

        .article-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 30px;
        }

        .not-found {
            text-align: center;
            padding: 58px 20px 64px;
        }

        .not-found-icon {
            width: 76px;
            height: 76px;
            border-radius: 50%;
            background: rgba(29, 78, 216, .08);
            color: var(--primary);
            font-size: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
        }

        .not-found h2 {
            font-size: 1.7rem;
            font-weight: 800;
            margin-bottom: 10px;
        }

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

        .related-section {
            padding: 36px 0 64px;
            background: var(--bg);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
        }

        .section-head .section-title {
            font-size: 1.7rem;
            font-weight: 800;
            letter-spacing: -.02em;
            position: relative;
            padding-left: 20px;
        }

        .section-head .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 8px;
            bottom: 8px;
            width: 5px;
            border-radius: 6px;
            background: linear-gradient(180deg, var(--primary), var(--accent));
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .card-item {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all .35s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .card-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

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

        .card-item:hover .card-cover img {
            transform: scale(1.06);
        }

        .card-cover .cover-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 23, 42, .72);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 5px 13px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, .18);
        }

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

        .card-body h3 {
            font-size: 1.12rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.5;
            color: var(--text-main);
        }

        .card-body p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.75;
            flex: 1;
        }

        .card-meta {
            margin-top: 18px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        .card-meta a {
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .card-meta a:hover {
            gap: 9px;
        }

        .stats-section {
            padding: 60px 0;
            background: linear-gradient(135deg, #0b1220 0%, #16213e 50%, #0e2a5a 100%);
            color: #fff;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius);
            backdrop-filter: blur(10px);
            transition: all .35s;
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, .1);
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, .2);
        }

        .stat-icon {
            font-size: 30px;
            margin-bottom: 14px;
            color: #60a5fa;
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.2;
        }

        .stat-label {
            color: rgba(255, 255, 255, .68);
            font-size: 13px;
            margin-top: 6px;
        }

        .faq-section {
            padding: 64px 0;
            background: var(--bg-white);
        }

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 22px 28px;
            margin-bottom: 16px;
            transition: all .3s ease;
        }

        .faq-item:hover {
            border-color: rgba(29, 78, 216, .35);
            box-shadow: var(--shadow);
            background: #fff;
        }

        .faq-q {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
        }

        .faq-q i {
            color: var(--primary);
            font-size: 18px;
        }

        .faq-a {
            margin-top: 14px;
            padding-left: 30px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.85;
            border-left: 3px solid rgba(29, 78, 216, .2);
        }

        .cta-section {
            padding: 64px 0;
            background: var(--bg);
        }

        .cta-box {
            position: relative;
            border-radius: 24px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 68px 48px;
            text-align: center;
            color: #fff;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, .86), rgba(29, 78, 216, .7));
        }

        .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-title {
            font-size: 1.9rem;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-text {
            max-width: 560px;
            margin: 0 auto 30px;
            color: rgba(255, 255, 255, .82);
            font-size: 16px;
        }

        .cta-box .btn {
            margin: 0 6px;
        }

        .cta-box .btn-light {
            background: #fff;
            color: var(--text-main);
            border-color: #fff;
        }

        .cta-box .btn-light:hover {
            background: #f0f4ff;
            transform: translateY(-2px);
        }

        .site-footer {
            background: #0b1220;
            color: rgba(255, 255, 255, .7);
            padding: 58px 0 0;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 42px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-brand p {
            margin-top: 16px;
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 320px;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

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

        .footer-links li {
            margin-bottom: 11px;
        }

        .footer-links a {
            color: rgba(255, 255, 255, .68);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 7px;
            transition: all .25s;
        }

        .footer-links a i {
            font-size: 11px;
            color: rgba(255, 255, 255, .35);
            transition: transform .25s;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-links a:hover i {
            transform: translateX(4px);
            color: var(--accent);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            padding: 24px 0 30px;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .navbar-area {
                flex-wrap: wrap;
                height: auto;
                padding: 14px 0;
            }

            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 5px;
                padding-top: 12px;
                padding-bottom: 6px;
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav a,
            .main-nav a.nav-cta {
                width: 100%;
                justify-content: center;
                padding: 12px 16px;
            }

            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .article-hero {
                padding: 56px 0 64px;
            }

            .article-shell {
                margin-top: -40px;
                padding: 30px 24px 36px;
                margin-left: 14px;
                margin-right: 14px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .cta-box {
                padding: 44px 24px;
            }

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

            .faq-item {
                padding: 18px 18px;
            }

            .faq-a {
                padding-left: 18px;
            }
        }

        @media (max-width: 520px) {
            .brand-logo .brand-name {
                font-size: 19px;
            }

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

            .hero-meta {
                gap: 10px;
                font-size: 13px;
            }

            .article-shell {
                padding: 24px 18px 30px;
            }

            .article-body {
                font-size: 1rem;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

            .stat-card {
                padding: 22px 12px;
            }

            .stat-num {
                font-size: 1.5rem;
            }

            .section-head .section-title {
                font-size: 1.35rem;
            }

            .cta-title {
                font-size: 1.4rem;
            }

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

        @media (prefers-reduced-motion: reduce) {
            * {
                transition: none !important;
                animation: none !important;
            }
        }