/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #ff4757;
            --primary-dark: #e2334a;
            --primary-light: #ff6b81;
            --secondary: #00d2ff;
            --accent: #ffa502;
            --dark: #0f0e17;
            --dark-2: #1a1930;
            --dark-3: #232145;
            --bg: #f6f7fb;
            --card: #ffffff;
            --text: #2d2d32;
            --text-light: #6b7280;
            --border: #e5e9f0;
            --radius: 18px;
            --radius-sm: 12px;
            --radius-lg: 24px;
            --shadow: 0 10px 30px rgba(15, 14, 23, 0.06);
            --shadow-lg: 0 20px 50px rgba(15, 14, 23, 0.12);
            --shadow-primary: 0 8px 24px rgba(255, 71, 87, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container: 1200px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            border: 2px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(255, 71, 87, 0.4);
            outline-offset: 2px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: var(--shadow-primary);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 32px rgba(255, 71, 87, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(255, 71, 87, 0.3);
        }

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

        .btn-outline:hover {
            background: rgba(255, 71, 87, 0.08);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 16px;
        }

        /* ===== 徽章/标签 ===== */
        .tag,
        .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .tag-primary {
            background: rgba(255, 71, 87, 0.12);
            color: var(--primary);
        }

        .tag-secondary {
            background: rgba(0, 210, 255, 0.12);
            color: #0098bf;
        }

        .tag-accent {
            background: rgba(255, 165, 2, 0.14);
            color: #b37400;
        }

        .tag-success {
            background: rgba(46, 213, 115, 0.14);
            color: #1fa855;
        }

        /* ===== 板块通用 ===== */
        .section-block {
            padding: 90px 0;
        }

        .section-block-alt {
            background: #fff;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 52px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 999px;
            background: rgba(255, 71, 87, 0.1);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

        .section-head h2 {
            font-size: clamp(28px, 4vw, 40px);
            line-height: 1.25;
            margin-bottom: 14px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== 头部导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(229, 233, 240, 0.7);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            box-shadow: var(--shadow);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: 0.01em;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 18px;
            font-weight: 900;
            box-shadow: var(--shadow-primary);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            padding: 9px 22px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            border: 1px solid transparent;
            transition: var(--transition);
        }

        .nav-link:hover {
            background: rgba(255, 71, 87, 0.08);
            color: var(--primary);
            border-color: rgba(255, 71, 87, 0.15);
        }

        .nav-link.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(255, 71, 87, 0.3);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
        }

        .header-cta .btn {
            padding: 9px 24px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 10px;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            border-radius: 2px;
            background: var(--dark);
            transition: var(--transition);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 190px 0 80px;
            background:
                linear-gradient(120deg, rgba(15, 14, 23, 0.94) 0%, rgba(30, 25, 48, 0.82) 48%, rgba(255, 71, 87, 0.28) 100%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -20%;
            width: 60%;
            height: 60px;
            background: radial-gradient(ellipse at center, rgba(255, 71, 87, 0.25), transparent 70%);
            pointer-events: none;
        }

        .hero-inner {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 7px 20px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.03em;
            margin-bottom: 24px;
        }

        .pulse-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #2ed573;
            position: relative;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(46, 213, 115, 0.6);
            }
            70% {
                box-shadow: 0 0 0 10px rgba(46, 213, 115, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(46, 213, 115, 0);
            }
        }

        .hero h1 {
            font-size: clamp(34px, 5vw, 56px);
            line-height: 1.15;
            color: #fff;
            margin-bottom: 20px;
            font-weight: 900;
            letter-spacing: 0.01em;
        }

        .hero h1 span {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            max-width: 500px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
        }

        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-meta span::before {
            content: '✓';
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: rgba(46, 213, 115, 0.25);
            color: #2ed573;
            font-size: 10px;
            font-weight: 700;
        }

        .hero-visual {
            position: relative;
        }

        .float-card {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(12px);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
        }

        .float-card-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.03em;
        }

        .float-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.08);
            margin-bottom: 10px;
            transition: var(--transition);
        }

        .float-item:hover {
            background: rgba(255, 255, 255, 0.15);
        }

        .float-item:last-child {
            margin-bottom: 0;
        }

        .float-avatar {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .float-item strong {
            display: block;
            font-size: 14px;
            color: #fff;
            font-weight: 600;
        }

        .float-item small {
            display: block;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 2px;
        }

        .hero-stats {
            grid-column: 1 / -1;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 40px;
            margin-top: 40px;
            padding: 24px 32px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            flex-wrap: wrap;
        }

        .stat-item {
            text-align: center;
        }

        .stat-item strong {
            display: block;
            font-size: 28px;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
        }

        .stat-item span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
            display: block;
        }

        .stat-divider {
            width: 1px;
            height: 38px;
            background: rgba(255, 255, 255, 0.2);
        }

        /* ===== 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--card);
            border-radius: var(--radius);
            padding: 32px 26px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            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(--secondary));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s ease;
        }

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

        .feature-card:hover::before {
            transform: scaleX(1);
        }

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 54px;
            height: 54px;
            border-radius: 16px;
            margin-bottom: 18px;
            font-size: 24px;
        }

        .feature-icon.ic-1 {
            background: rgba(255, 71, 87, 0.12);
            color: var(--primary);
        }

        .feature-icon.ic-2 {
            background: rgba(0, 210, 255, 0.12);
            color: #0098bf;
        }

        .feature-icon.ic-3 {
            background: rgba(46, 213, 115, 0.12);
            color: #1fa855;
        }

        .feature-icon.ic-4 {
            background: rgba(255, 165, 2, 0.14);
            color: #b37400;
        }

        .feature-card h3 {
            font-size: 17px;
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== 核心说明 ===== */
        .about-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

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

        .about-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 380px;
        }

        .about-media::after {
            content: '官方服务';
            position: absolute;
            bottom: 16px;
            left: 16px;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(15, 14, 23, 0.7);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.03em;
        }

        .about-content h2 {
            font-size: clamp(26px, 3vw, 36px);
            margin-bottom: 16px;
        }

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

        .check-list {
            margin-bottom: 28px;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 15px;
            color: var(--text);
        }

        .check-list li::before {
            content: '✓';
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: rgba(46, 213, 115, 0.15);
            color: #1fa855;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* ===== 分类入口大卡片 ===== */
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background:
                linear-gradient(110deg, rgba(15, 14, 23, 0.92), rgba(30, 25, 48, 0.72)),
                url('/assets/images/coverpic/cover-2.png') center/cover no-repeat;
            padding: 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }

        .category-card h3 {
            color: #fff;
            font-size: 28px;
            margin-bottom: 12px;
        }

        .category-card p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            line-height: 1.7;
            max-width: 520px;
        }

        .category-card .btn {
            flex-shrink: 0;
        }

        .category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 16px;
            border-radius: 999px;
            background: rgba(255, 71, 87, 0.25);
            border: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        /* ===== 资讯列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

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

        .news-media {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

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

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

        .news-media .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            backdrop-filter: blur(4px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

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

        .news-body h3 {
            font-size: 17px;
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .news-body h3 a:hover {
            color: var(--primary);
        }

        .news-body p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }

        .news-meta time {
            font-size: 12px;
            color: var(--text-light);
        }

        .read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
        }

        .read-more:hover {
            color: var(--primary-dark);
            letter-spacing: 0.02em;
        }

        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            border: 2px dashed var(--border);
            border-radius: var(--radius);
            color: var(--text-light);
            font-size: 15px;
            background: #fff;
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            position: relative;
            background: var(--card);
            border-radius: var(--radius);
            padding: 36px 26px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

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

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 18px;
            box-shadow: var(--shadow-primary);
        }

        .step-card h3 {
            font-size: 16px;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
        }

        .step-line {
            position: absolute;
            top: 60px;
            right: -24px;
            width: 24px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), transparent);
        }

        .step-card:last-child .step-line {
            display: none;
        }

        /* ===== 用户社区 ===== */
        .testimonials {
            background:
                linear-gradient(135deg, rgba(15, 14, 23, 0.96), rgba(30, 25, 48, 0.9)),
                url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            padding: 100px 0;
            color: #fff;
        }

        .testimonials .section-head h2 {
            color: #fff;
        }

        .testimonials .section-head p {
            color: rgba(255, 255, 255, 0.65);
        }

        .testimonials .section-tag {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }

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

        .testimonial-card {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            padding: 28px;
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .testimonial-card:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-4px);
        }

        .testimonial-stars {
            display: flex;
            gap: 2px;
            color: var(--accent);
            font-size: 14px;
            margin-bottom: 14px;
        }

        .testimonial-card p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 18px;
        }

        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-avatar {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
        }

        .testimonial-user strong {
            display: block;
            font-size: 14px;
            color: #fff;
        }

        .testimonial-user small {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        .testimonial-user small::before {
            content: '✓';
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: rgba(46, 213, 115, 0.3);
            color: #2ed573;
            font-size: 9px;
            font-weight: 700;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(255, 71, 87, 0.25);
        }

        .faq-item[open] {
            border-color: rgba(255, 71, 87, 0.3);
            box-shadow: var(--shadow-lg);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 22px 28px;
            cursor: pointer;
            list-style: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            transition: var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--primary);
        }

        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(255, 71, 87, 0.1);
            color: var(--primary);
            font-size: 18px;
            font-weight: 400;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            padding: 0 28px 24px;
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.8;
        }

        .faq-answer p {
            margin-bottom: 8px;
        }

        .faq-answer p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 30px 0 90px;
        }

        .cta-card {
            position: relative;
            border-radius: var(--radius-lg);
            background:
                linear-gradient(100deg, rgba(15, 14, 23, 0.95), rgba(255, 71, 87, 0.65)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 70px 60px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
            overflow: hidden;
        }

        .cta-card::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-card h2 {
            color: #fff;
            font-size: clamp(24px, 3.5vw, 36px);
            margin-bottom: 14px;
        }

        .cta-card p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

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

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 70px 0 0;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 60px;
            padding-bottom: 50px;
        }

        .footer-brand .brand {
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            max-width: 360px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-nav h4 {
            color: #fff;
            font-size: 15px;
            margin-bottom: 18px;
        }

        .footer-nav-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-nav-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-nav-links a:hover {
            color: var(--primary-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            text-align: center;
        }

        .footer-bottom .container {
            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 .tech {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.3);
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

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

            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero-visual {
                display: none;
            }

            .hero-stats {
                margin-top: 20px;
            }
        }

        @media (max-width: 768px) {
            .site-header .header-inner {
                height: 64px;
            }

            .main-nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.97);
                backdrop-filter: blur(16px);
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 32px;
                gap: 10px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
                transform: translateY(-120%);
                transition: transform 0.35s ease;
                pointer-events: none;
            }

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

            .nav-link {
                width: 100%;
                padding: 12px 20px;
            }

            .nav-toggle {
                display: flex;
            }

            .header-cta .btn {
                display: none;
            }

            .section-block {
                padding: 70px 0;
            }

            .container {
                padding: 0 20px;
            }

            .about-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .category-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 36px 28px;
            }

            .hero {
                padding: 150px 0 60px;
            }

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

            .hero-stats {
                gap: 20px;
                padding: 20px;
            }

            .stat-item strong {
                font-size: 22px;
            }

            .cta-card {
                padding: 50px 28px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }

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

            .step-line {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }

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

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

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

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

            .stat-divider {
                display: none;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                justify-content: center;
            }

            .hero-meta {
                flex-direction: column;
                gap: 8px;
            }

            .category-card {
                padding: 28px 20px;
            }

            .category-card h3 {
                font-size: 22px;
            }

            .cta-card .btn-group {
                flex-direction: column;
                width: 100%;
            }

            .cta-card .btn-group .btn {
                width: 100%;
                justify-content: center;
            }

            .faq-item summary {
                padding: 18px 20px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 20px 20px;
            }
        }

/* roulang page: article */
:root {
            --primary: #e8452c;
            --primary-dark: #c62e19;
            --primary-soft: #fff1ed;
            --accent: #ffb800;
            --accent-dark: #e69b00;
            --ink: #1f2430;
            --muted: #6b7280;
            --soft: #f0f2f5;
            --surface: #ffffff;
            --border: #e5e7eb;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.10);
            --container: 1200px;
            --space: 72px;
            --transition: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.75;
            color: var(--ink);
            background: var(--soft);
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
        }

        .container {
            width: min(100% - 40px, var(--container));
            margin-inline: auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 32px;
            height: 72px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.05rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            white-space: nowrap;
            color: var(--ink);
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(232, 69, 44, 0.3);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
            background: var(--soft);
            padding: 5px;
            border-radius: 14px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: 10px;
            color: var(--muted);
            transition: all var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(232, 69, 44, 0.06);
        }

        .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(232, 69, 44, 0.28);
        }

        .header-cta {
            margin-left: 4px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 0.92rem;
            padding: 10px 20px;
            transition: all var(--transition);
            border: 2px solid transparent;
            outline: none;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(232, 69, 44, 0.35);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(232, 69, 44, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(232, 69, 44, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-light {
            background: #fff;
            color: var(--ink);
            border-color: var(--border);
        }

        .btn-light:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: #1f2430;
            box-shadow: 0 4px 16px rgba(255, 184, 0, 0.3);
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: var(--soft);
        }

        .nav-toggle span {
            width: 20px;
            height: 2px;
            background: var(--ink);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 90px 0 72px;
            color: #fff;
            overflow: hidden;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(31, 36, 48, 0.86), rgba(232, 69, 44, 0.72));
            z-index: 1;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.82);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb i {
            font-size: 0.7rem;
        }

        .page-hero h1 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            line-height: 1.4;
            max-width: 800px;
            margin-bottom: 14px;
            text-shadow: 0 2px 14px rgba(0, 0, 0, 0.2);
        }

        .page-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.9);
        }

        .page-hero .hero-meta .badge {
            background: rgba(255, 255, 255, 0.16);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 4px 12px;
            border-radius: 8px;
            font-size: 0.82rem;
            color: #fff;
        }

        .page-hero .hero-meta i {
            margin-right: 5px;
            color: var(--accent);
        }

        /* Article Layout */
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 360px;
            gap: 40px;
            padding: 48px 0;
            align-items: start;
        }

        .card {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid rgba(0, 0, 0, 0.04);
            box-shadow: var(--shadow);
        }

        .article-main.card {
            padding: 44px;
        }

        .article-content {
            font-size: 1.02rem;
            color: #2d3542;
        }

        .article-content h2 {
            font-size: 1.5rem;
            margin-top: 36px;
            margin-bottom: 16px;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 1.2rem;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--ink);
        }

        .article-content p {
            margin-bottom: 18px;
            line-height: 1.95;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 20px;
            padding-left: 22px;
        }

        .article-content ul {
            list-style: disc;
        }

        .article-content ol {
            list-style: decimal;
        }

        .article-content li {
            margin-bottom: 8px;
            line-height: 1.85;
        }

        .article-content img {
            border-radius: var(--radius-sm);
            margin: 20px 0;
        }

        .article-content blockquote {
            background: var(--primary-soft);
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            border-radius: 8px;
            margin: 20px 0;
            color: #6b3a30;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--soft);
            color: var(--muted);
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition);
        }

        .tag:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 28px;
            color: var(--primary);
            font-weight: 600;
        }

        .back-link:hover {
            color: var(--primary-dark);
        }

        /* Sidebar */
        .article-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 96px;
        }

        .side-card {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid rgba(0, 0, 0, 0.04);
            box-shadow: var(--shadow);
            padding: 26px;
        }

        .side-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .side-card h3 i {
            color: var(--primary);
        }

        .side-info-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .side-info-item {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            font-size: 0.9rem;
            color: var(--muted);
            line-height: 1.6;
        }

        .side-info-item i {
            color: var(--primary);
            font-size: 1rem;
            margin-top: 4px;
        }

        .side-card .btn {
            width: 100%;
            margin-top: 16px;
        }

        .side-recommend-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .side-recommend-item {
            display: flex;
            gap: 14px;
            align-items: center;
            padding: 10px;
            border-radius: 12px;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .side-recommend-item:hover {
            background: var(--soft);
            border-color: var(--border);
            transform: translateX(4px);
        }

        .side-recommend-item img {
            width: 72px;
            height: 54px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }

        .side-recommend-item .text {
            font-size: 0.87rem;
            font-weight: 600;
            line-height: 1.5;
            color: var(--ink);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .side-recommend-item .text span {
            display: block;
            font-size: 0.78rem;
            font-weight: 400;
            color: var(--muted);
            margin-top: 4px;
        }

        .not-found-card {
            text-align: center;
            padding: 80px 40px;
        }

        .not-found-card i {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .not-found-card h2 {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }

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

        /* Related Section */
        .related-section {
            padding: 60px 0;
            background: #fff;
            border-top: 1px solid rgba(0, 0, 0, 0.05);
        }

        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 32px;
        }

        .section-head h2 {
            font-size: 1.6rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .section-head h2 i {
            color: var(--primary);
            font-size: 1.4rem;
        }

        .section-head p {
            color: var(--muted);
            font-size: 0.92rem;
        }

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

        .related-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid rgba(0, 0, 0, 0.04);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }

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

        .related-card .cover {
            position: relative;
            height: 170px;
            overflow: hidden;
        }

        .related-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .related-card .cover .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(31, 36, 48, 0.75);
            color: #fff;
            padding: 4px 12px;
            border-radius: 8px;
            font-size: 0.78rem;
            backdrop-filter: blur(4px);
        }

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

        .related-card .body h3 {
            font-size: 1rem;
            font-weight: 700;
            line-height: 1.55;
            margin-bottom: 8px;
        }

        .related-card .body p {
            font-size: 0.86rem;
            color: var(--muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--muted);
            margin-top: 12px;
        }

        /* CTA Section */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(31, 36, 48, 0.9), rgba(232, 69, 44, 0.8));
            z-index: 1;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }

        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.88);
            font-size: 1rem;
            margin-bottom: 28px;
        }

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

        /* Footer */
        .site-footer {
            background: #12141c;
            color: rgba(255, 255, 255, 0.75);
            padding-top: 52px;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 48px;
            padding-bottom: 32px;
        }

        .footer-brand .brand {
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            max-width: 380px;
        }

        .footer-nav h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .footer-nav-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-nav-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            transition: all var(--transition);
            padding: 2px 6px;
        }

        .footer-nav-links a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 18px 0;
        }

        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom .tech {
            color: rgba(255, 255, 255, 0.4);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .article-side {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .container {
                width: min(100% - 28px, var(--container));
            }

            .header-inner {
                height: 64px;
                gap: 12px;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--surface);
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 20px;
                border-radius: 0 0 16px 16px;
                box-shadow: var(--shadow);
                transform: translateY(-16px);
                opacity: 0;
                pointer-events: none;
                transition: all 0.3s ease;
            }

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

            .nav-link {
                padding: 12px 16px;
            }

            .header-cta {
                margin-left: auto;
            }

            .nav-toggle {
                display: flex;
            }

            .page-hero {
                padding: 60px 0 48px;
            }

            .article-main.card {
                padding: 28px 22px;
            }

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

            .related-card .cover {
                height: 200px;
            }

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

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

        @media (max-width: 520px) {
            .brand span:last-child {
                font-size: 0.9rem;
                letter-spacing: 0;
            }

            .header-cta .btn {
                padding: 8px 14px;
                font-size: 0.84rem;
            }

            .page-hero h1 {
                font-size: 1.3rem;
            }

            .hero-meta {
                gap: 10px;
            }

            .article-side {
                grid-template-columns: 1fr;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .footer-bottom .container {
                justify-content: center;
                text-align: center;
            }
        }

/* roulang page: category1 */
/* ========== Design Tokens ========== */
    :root {
        --primary: #4F46E5;
        --primary-dark: #4338CA;
        --primary-light: #EEF2FF;
        --accent: #06B6D4;
        --accent-dark: #0891B2;
        --accent-light: #ECFEFF;
        --warm: #F59E0B;
        --warm-dark: #D97706;
        --warm-light: #FFFBEB;
        --bg: #F8FAFC;
        --bg-deep: #0F172A;
        --bg-deep-2: #1E293B;
        --surface: #FFFFFF;
        --text: #1E293B;
        --text-soft: #64748B;
        --text-light: #94A3B8;
        --border: #E2E8F0;
        --success: #10B981;
        --danger: #EF4444;
        --radius: 16px;
        --radius-sm: 10px;
        --radius-lg: 24px;
        --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
        --shadow-lg: 0 8px 32px rgba(79, 70, 229, 0.15);
        --shadow-accent: 0 8px 24px rgba(6, 182, 212, 0.18);
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --container-w: 1200px;
    }

    /* ========== Reset & Base ========== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }
    body {
        font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }
    img {
        max-width: 100%;
        display: block;
        height: auto;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: var(--transition);
    }
    button {
        font-family: inherit;
        border: none;
        background: none;
        cursor: pointer;
    }
    input,
    select {
        font-family: inherit;
        font-size: 14px;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        padding: 10px 14px;
        outline: none;
        transition: var(--transition);
        background: var(--surface);
    }
    input:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
    }
    .container {
        max-width: var(--container-w);
        margin: 0 auto;
        padding: 0 24px;
    }
    section {
        padding: 88px 0;
    }
    .section-head {
        max-width: 720px;
        margin-bottom: 48px;
    }
    .section-head.center {
        margin-left: auto;
        margin-right: auto;
        text-align: center;
    }
    .section-head .eyebrow {
        display: inline-block;
        background: var(--primary-light);
        color: var(--primary);
        font-size: 13px;
        font-weight: 600;
        padding: 6px 16px;
        border-radius: 100px;
        margin-bottom: 14px;
        letter-spacing: 0.04em;
    }
    .section-head h2 {
        font-size: 32px;
        font-weight: 700;
        line-height: 1.3;
        color: var(--text);
        margin-bottom: 10px;
        letter-spacing: -0.02em;
    }
    .section-head p {
        color: var(--text-soft);
        font-size: 16px;
    }
    .section-head.center .eyebrow {
        background: var(--accent-light);
        color: var(--accent-dark);
    }
    @media (max-width: 768px) {
        section {
            padding: 56px 0;
        }
        .section-head h2 {
            font-size: 24px;
        }
    }

    /* ========== Buttons ========== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-size: 15px;
        font-weight: 600;
        padding: 12px 28px;
        border-radius: 100px;
        transition: var(--transition);
        border: 2px solid transparent;
        line-height: 1.4;
        white-space: nowrap;
    }
    .btn i {
        font-size: 14px;
        transition: transform 0.3s;
    }
    .btn-primary {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    }
    .btn-primary:hover {
        background: var(--primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
    }
    .btn-primary:hover i {
        transform: translateX(4px);
    }
    .btn-accent {
        background: var(--accent);
        color: #fff;
        box-shadow: 0 4px 14px rgba(6, 182, 212, 0.28);
    }
    .btn-accent:hover {
        background: var(--accent-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(6, 182, 212, 0.38);
    }
    .btn-white {
        background: #fff;
        color: var(--primary);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    }
    .btn-white:hover {
        background: var(--primary-light);
        transform: translateY(-2px);
    }
    .btn-outline {
        border-color: var(--border);
        color: var(--text-soft);
        background: transparent;
    }
    .btn-outline:hover {
        border-color: var(--primary);
        color: var(--primary);
        background: var(--primary-light);
    }
    .btn-lg {
        padding: 16px 40px;
        font-size: 17px;
    }

    /* ========== Header / Nav ========== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        transition: var(--transition);
    }
    .site-header.scrolled {
        box-shadow: 0 4px 24px rgba(15, 23, 42, 0.07);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 20px;
    }
    .brand {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 18px;
        font-weight: 700;
        color: var(--text);
        letter-spacing: -0.01em;
    }
    .brand-icon {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        font-weight: 800;
        flex-shrink: 0;
        box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav-link {
        font-size: 15px;
        font-weight: 500;
        color: var(--text-soft);
        padding: 8px 18px;
        border-radius: 100px;
        transition: var(--transition);
        position: relative;
    }
    .nav-link:hover {
        color: var(--primary);
        background: var(--primary-light);
    }
    .nav-link.active {
        color: var(--primary);
        background: var(--primary-light);
        font-weight: 600;
    }
    .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 3px;
        left: 50%;
        transform: translateX(-50%);
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background: var(--primary);
    }
    .header-cta {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .header-cta .btn {
        padding: 10px 22px;
        font-size: 14px;
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 10px;
        border-radius: 8px;
        z-index: 110;
    }
    .nav-toggle span {
        width: 22px;
        height: 2px;
        background: var(--text);
        border-radius: 2px;
        transition: var(--transition);
    }
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translateY(7px);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translateY(-7px);
    }
    @media (max-width: 768px) {
        .header-inner {
            height: 64px;
        }
        .brand {
            font-size: 15px;
        }
        .brand-icon {
            width: 34px;
            height: 34px;
            font-size: 16px;
        }
        .nav-toggle {
            display: flex;
        }
        .main-nav {
            position: fixed;
            top: 0;
            right: -280px;
            width: 260px;
            height: 100vh;
            background: var(--surface);
            flex-direction: column;
            align-items: flex-start;
            padding: 84px 24px 32px;
            gap: 4px;
            box-shadow: -8px 0 32px rgba(15, 23, 42, 0.12);
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 105;
        }
        .main-nav.open {
            right: 0;
        }
        .nav-link {
            width: 100%;
            padding: 14px 16px;
            font-size: 16px;
            border-radius: 12px;
        }
        .header-cta {
            margin-left: auto;
        }
        .header-cta .btn {
            padding: 8px 14px;
            font-size: 13px;
        }
    }
    @media (max-width: 520px) {
        .brand span:last-child {
            max-width: 140px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .header-cta .btn {
            padding: 8px 12px;
            font-size: 12px;
        }
    }

    /* ========== Page Banner ========== */
    .page-banner {
        position: relative;
        padding: 96px 0 84px;
        background: var(--bg-deep);
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        color: #fff;
        overflow: hidden;
    }
    .page-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(115deg, rgba(15, 23, 42, 0.92) 20%, rgba(79, 70, 229, 0.55) 70%, rgba(6, 182, 212, 0.3) 100%);
    }
    .page-banner .container {
        position: relative;
        z-index: 2;
    }
    .breadcrumb {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.7);
        margin-bottom: 20px;
        display: flex;
        gap: 8px;
        align-items: center;
        flex-wrap: wrap;
    }
    .breadcrumb a {
        color: rgba(255, 255, 255, 0.8);
    }
    .breadcrumb a:hover {
        color: #fff;
    }
    .page-banner h1 {
        font-size: 42px;
        font-weight: 800;
        line-height: 1.25;
        letter-spacing: -0.02em;
        margin-bottom: 16px;
        max-width: 720px;
    }
    .page-banner .banner-sub {
        font-size: 18px;
        color: rgba(255, 255, 255, 0.85);
        max-width: 640px;
        line-height: 1.7;
        margin-bottom: 28px;
    }
    .banner-status-row {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }
    .status-pill {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(255, 255, 255, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.2);
        backdrop-filter: blur(8px);
        padding: 6px 16px;
        border-radius: 100px;
        font-size: 13px;
        font-weight: 500;
    }
    .status-pill i {
        color: var(--accent);
        font-size: 12px;
    }
    .status-pill .live-dot {
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: #10B981;
        box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3);
        animation: pulse-dot 1.6s infinite;
    }
    @keyframes pulse-dot {
        0% {
            box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
        }
        70% {
            box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
        }
        100% {
            box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
        }
    }
    @media (max-width: 768px) {
        .page-banner {
            padding: 56px 0 48px;
        }
        .page-banner h1 {
            font-size: 28px;
        }
        .page-banner .banner-sub {
            font-size: 16px;
        }
        .status-pill {
            font-size: 12px;
            padding: 5px 12px;
        }
    }

    /* ========== Quick Category Chips ========== */
    .quick-chips {
        padding: 32px 0;
        margin-top: -20px;
        position: relative;
        z-index: 10;
    }
    .chips-wrap {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
        background: var(--surface);
        border-radius: var(--radius);
        padding: 16px 20px;
        box-shadow: var(--shadow);
        border: 1px solid var(--border);
        align-items: center;
    }
    .chips-label {
        font-size: 14px;
        font-weight: 600;
        color: var(--text-soft);
        margin-right: 4px;
    }
    .chip-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 14px;
        font-weight: 500;
        color: var(--text-soft);
        padding: 8px 18px;
        border-radius: 100px;
        background: var(--bg);
        border: 1px solid transparent;
        transition: var(--transition);
    }
    .chip-link:hover,
    .chip-link.active {
        background: var(--primary-light);
        color: var(--primary);
        border-color: rgba(79, 70, 229, 0.15);
    }
    .chip-link i {
        font-size: 12px;
    }

    /* ========== Login Methods ========== */
    .login-methods {
        background: var(--surface);
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }
    .login-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .login-card {
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 32px 28px;
        transition: var(--transition);
        position: relative;
        overflow: hidden;
    }
    .login-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);
    }
    .login-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(79, 70, 229, 0.2);
        background: var(--surface);
    }
    .login-card:hover::before {
        opacity: 1;
    }
    .login-card .card-cover {
        width: 64px;
        height: 64px;
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 26px;
        margin-bottom: 20px;
        color: #fff;
    }
    .login-card:nth-child(1) .card-cover {
        background: linear-gradient(135deg, #4F46E5, #7C3AED);
    }
    .login-card:nth-child(2) .card-cover {
        background: linear-gradient(135deg, #06B6D4, #0EA5E9);
    }
    .login-card:nth-child(3) .card-cover {
        background: linear-gradient(135deg, #F59E0B, #F97316);
    }
    .login-card h3 {
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .login-card p {
        color: var(--text-soft);
        font-size: 14px;
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .card-tags {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
        margin-top: 12px;
    }
    .tag {
        display: inline-block;
        font-size: 12px;
        font-weight: 500;
        padding: 4px 10px;
        border-radius: 100px;
        background: var(--surface);
        border: 1px solid var(--border);
        color: var(--text-soft);
    }
    .tag.tag-primary {
        background: var(--primary-light);
        color: var(--primary);
        border-color: transparent;
    }
    .tag.tag-accent {
        background: var(--accent-light);
        color: var(--accent-dark);
        border-color: transparent;
    }
    .tag.tag-warm {
        background: var(--warm-light);
        color: var(--warm-dark);
        border-color: transparent;
    }
    @media (max-width: 768px) {
        .login-grid {
            grid-template-columns: 1fr;
        }
    }

    /* ========== Download Guide ========== */
    .download-section {
        background: var(--bg);
    }
    .download-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }
    .download-card {
        background: var(--surface);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        overflow: hidden;
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }
    .download-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }
    .download-card .card-media {
        height: 140px;
        overflow: hidden;
        position: relative;
    }
    .download-card .card-media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .download-card:hover .card-media img {
        transform: scale(1.06);
    }
    .download-card .card-media::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(15, 23, 42, 0.5), transparent);
    }
    .download-card .media-badge {
        position: absolute;
        top: 12px;
        left: 12px;
        z-index: 2;
        background: rgba(255, 255, 255, 0.92);
        color: var(--text);
        font-size: 12px;
        font-weight: 700;
        padding: 5px 12px;
        border-radius: 100px;
        backdrop-filter: blur(4px);
    }
    .download-card .card-body {
        padding: 22px 20px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .download-card .icon-wrap {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        background: var(--primary-light);
        color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        margin-bottom: 14px;
    }
    .download-card:nth-child(2) .icon-wrap {
        background: var(--accent-light);
        color: var(--accent-dark);
    }
    .download-card:nth-child(3) .icon-wrap {
        background: var(--warm-light);
        color: var(--warm-dark);
    }
    .download-card:nth-child(4) .icon-wrap {
        background: #F0FDF4;
        color: var(--success);
    }
    .download-card h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 6px;
    }
    .download-card .ver-desc {
        font-size: 14px;
        color: var(--text-soft);
        margin-bottom: 14px;
        line-height: 1.6;
    }
    .download-card .dl-btn {
        margin-top: auto;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        padding: 10px 16px;
        border-radius: 100px;
        background: var(--bg);
        color: var(--text);
        font-size: 14px;
        font-weight: 600;
        border: 1px solid var(--border);
        transition: var(--transition);
    }
    .download-card .dl-btn:hover {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
    }
    @media (max-width: 1024px) {
        .download-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    @media (max-width: 520px) {
        .download-grid {
            grid-template-columns: 1fr;
        }
    }

    /* ========== Process Timeline ========== */
    .timeline-section {
        background: var(--bg-deep);
        color: #fff;
        position: relative;
        overflow: hidden;
    }
    .timeline-section::before {
        content: '';
        position: absolute;
        top: -50%;
        right: -20%;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(79, 70, 229, 0.25), transparent 60%);
        pointer-events: none;
    }
    .timeline-section .section-head h2 {
        color: #fff;
    }
    .timeline-section .section-head p {
        color: rgba(255, 255, 255, 0.7);
    }
    .timeline-section .section-head .eyebrow {
        background: rgba(255, 255, 255, 0.1);
        color: var(--accent);
    }
    .timeline {
        position: relative;
        max-width: 760px;
        margin: 0 auto;
        padding-left: 40px;
    }
    .timeline::before {
        content: '';
        position: absolute;
        left: 14px;
        top: 0;
        bottom: 0;
        width: 2px;
        background: linear-gradient(to bottom, var(--primary), var(--accent));
        opacity: 0.6;
    }
    .timeline-item {
        position: relative;
        padding: 0 0 36px 24px;
    }
    .timeline-item:last-child {
        padding-bottom: 0;
    }
    .timeline-item .dot {
        position: absolute;
        left: -40px;
        top: 4px;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: var(--bg-deep-2);
        border: 2px solid var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 2;
    }
    .timeline-item .dot i {
        font-size: 11px;
        color: var(--accent);
    }
    .timeline-item .step-label {
        font-size: 13px;
        font-weight: 600;
        color: var(--accent);
        margin-bottom: 4px;
        letter-spacing: 0.05em;
    }
    .timeline-item h3 {
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 6px;
        color: #fff;
    }
    .timeline-item p {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.75);
        line-height: 1.7;
    }
    @media (max-width: 768px) {
        .timeline {
            padding-left: 20px;
        }
        .timeline-item .dot {
            left: -20px;
            width: 22px;
            height: 22px;
        }
        .timeline-item {
            padding-left: 18px;
        }
        .timeline-item h3 {
            font-size: 17px;
        }
    }

    /* ========== Security Notes ========== */
    .security-section {
        background: var(--surface);
    }
    .security-layout {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
    }
    .security-media {
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-lg);
        position: relative;
    }
    .security-media img {
        width: 100%;
        height: 360px;
        object-fit: cover;
    }
    .security-media .media-overlay {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 24px;
        background: linear-gradient(transparent, rgba(15, 23, 42, 0.8));
        color: #fff;
    }
    .security-media .media-overlay h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 4px;
    }
    .security-media .media-overlay p {
        font-size: 14px;
        opacity: 0.85;
    }
    .security-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    .security-item {
        display: flex;
        gap: 16px;
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 20px 24px;
        transition: var(--transition);
    }
    .security-item:hover {
        border-color: rgba(79, 70, 229, 0.2);
        box-shadow: var(--shadow);
        transform: translateX(4px);
    }
    .security-item .sec-icon {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        background: var(--success);
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        flex-shrink: 0;
    }
    .security-item:nth-child(2) .sec-icon {
        background: var(--warm);
    }
    .security-item:nth-child(3) .sec-icon {
        background: var(--accent);
    }
    .security-item:nth-child(4) .sec-icon {
        background: var(--primary);
    }
    .security-item h4 {
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 4px;
    }
    .security-item p {
        font-size: 14px;
        color: var(--text-soft);
        line-height: 1.6;
    }
    @media (max-width: 768px) {
        .security-layout {
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .security-media img {
            height: 240px;
        }
    }

    /* ========== FAQ ========== */
    .faq-section {
        background: var(--bg);
    }
    .faq-layout {
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        gap: 48px;
        align-items: start;
    }
    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }
    .faq-item {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover {
        border-color: rgba(79, 70, 229, 0.2);
    }
    .faq-item details {
        padding: 0;
    }
    .faq-item summary {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        padding: 22px 24px;
        list-style: none;
        cursor: pointer;
        font-size: 16px;
        font-weight: 600;
        transition: var(--transition);
    }
    .faq-item summary::-webkit-details-marker {
        display: none;
    }
    .faq-item summary:hover {
        color: var(--primary);
    }
    .faq-item summary .faq-icon {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: var(--primary-light);
        color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 13px;
        flex-shrink: 0;
        transition: var(--transition);
    }
    .faq-item details[open] summary .faq-icon {
        transform: rotate(45deg);
        background: var(--primary);
        color: #fff;
    }
    .faq-item .faq-answer {
        padding: 0 24px 22px;
        font-size: 15px;
        color: var(--text-soft);
        line-height: 1.7;
    }
    .faq-side {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }
    .faq-support-card {
        background: var(--bg-deep);
        border-radius: var(--radius);
        padding: 32px 28px;
        color: #fff;
        position: relative;
        overflow: hidden;
    }
    .faq-support-card::before {
        content: '';
        position: absolute;
        top: -40px;
        right: -40px;
        width: 120px;
        height: 120px;
        background: rgba(6, 182, 212, 0.2);
        border-radius: 50%;
    }
    .faq-support-card h3 {
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 8px;
    }
    .faq-support-card p {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.75);
        margin-bottom: 20px;
    }
    @media (max-width: 768px) {
        .faq-layout {
            grid-template-columns: 1fr;
        }
        .faq-item summary {
            font-size: 15px;
            padding: 18px 18px;
        }
        .faq-item .faq-answer {
            padding: 0 18px 18px;
        }
    }

    /* ========== CTA ========== */
    .cta-section {
        padding: 0;
        background: var(--surface);
    }
    .cta-box {
        background: var(--bg-deep);
        background-image: url('/assets/images/backpic/back-3.png');
        background-size: cover;
        background-position: center;
        border-radius: 24px;
        padding: 64px 48px;
        position: relative;
        overflow: hidden;
        color: #fff;
        margin-bottom: 88px;
    }
    .cta-box::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(90deg, rgba(15, 23, 42, 0.92), rgba(79, 70, 229, 0.65), rgba(6, 182, 212, 0.35));
    }
    .cta-box .container {
        position: relative;
        z-index: 2;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        flex-wrap: wrap;
    }
    .cta-text h2 {
        font-size: 30px;
        font-weight: 800;
        margin-bottom: 8px;
        letter-spacing: -0.02em;
    }
    .cta-text p {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.85);
        max-width: 520px;
    }
    .cta-actions {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
    }
    @media (max-width: 768px) {
        .cta-box {
            padding: 40px 24px;
            margin-bottom: 56px;
            border-radius: var(--radius);
        }
        .cta-text h2 {
            font-size: 22px;
        }
        .cta-box .container {
            flex-direction: column;
            align-items: flex-start;
        }
    }

    /* ========== Footer ========== */
    .site-footer {
        background: var(--bg-deep);
        color: rgba(255, 255, 255, 0.7);
        padding-top: 64px;
    }
    .footer-inner {
        display: grid;
        grid-template-columns: 1.4fr 1fr;
        gap: 48px;
        padding-bottom: 48px;
    }
    .footer-brand .brand {
        color: #fff;
        margin-bottom: 16px;
        font-size: 20px;
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        max-width: 380px;
    }
    .footer-nav h4 {
        color: #fff;
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 16px;
    }
    .footer-nav-links {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .footer-nav-links a {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.65);
        transition: var(--transition);
    }
    .footer-nav-links a:hover {
        color: #fff;
        padding-left: 4px;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding: 20px 0;
    }
    .footer-bottom .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 12px;
        flex-wrap: wrap;
    }
    .footer-bottom p {
        font-size: 14px;
    }
    .footer-bottom .tech {
        font-size: 13px;
        color: rgba(255, 255, 255, 0.4);
    }
    @media (max-width: 768px) {
        .footer-inner {
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .footer-bottom .container {
            flex-direction: column;
            text-align: center;
        }
    }

    /* ========== Shared Utilities ========== */
    .divider {
        border: none;
        height: 1px;
        background: var(--border);
        margin: 0;
    }
    .highlight {
        color: var(--primary);
        font-weight: 700;
    }
    .text-accent {
        color: var(--accent);
    }
    .mb-1 {
        margin-bottom: 8px;
    }
    .mb-2 {
        margin-bottom: 16px;
    }
    .mb-3 {
        margin-bottom: 24px;
    }
    .mb-4 {
        margin-bottom: 32px;
    }
    .text-center {
        text-align: center;
    }
    @media (max-width: 520px) {
        .section-head h2 {
            font-size: 21px;
        }
        .section-head p {
            font-size: 14px;
        }
    }