/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b1f33;
            --primary-deep: #071423;
            --primary-light: #132d4a;
            --accent: #00c9a7;
            --accent-dark: #00a98c;
            --accent-glow: rgba(0, 201, 167, 0.35);
            --secondary: #ff7a45;
            --secondary-dark: #e8612e;
            --bg-body: #f2f5fa;
            --bg-deep: #0a1727;
            --bg-card: #ffffff;
            --text-main: #17233a;
            --text-sub: #52657a;
            --text-weak: #8a99ab;
            --border-light: #e4eaf2;
            --border-dark: #1d3a57;
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 28px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 12px rgba(8, 20, 40, 0.06);
            --shadow-md: 0 10px 32px rgba(8, 20, 40, 0.1);
            --shadow-lg: 0 20px 60px rgba(8, 20, 40, 0.18);
            --shadow-accent: 0 8px 30px rgba(0, 201, 167, 0.28);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        }

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

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

        body {
            font-family: var(--font-main);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        select,
        textarea {
            font: inherit;
            color: inherit;
            border: 0;
            background: none;
            outline: none;
        }

        button {
            cursor: pointer;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 顶部信息条 ===== */
        .topbar {
            background: var(--primary-deep);
            color: rgba(255, 255, 255, 0.72);
            font-size: 13px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 0;
            min-height: 36px;
        }

        .topbar-links {
            display: flex;
            align-items: center;
            gap: 18px;
        }

        .topbar-links a {
            color: rgba(255, 255, 255, 0.72);
            transition: var(--transition);
        }

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

        .topbar-info {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .topbar-info i {
            color: var(--accent);
            margin-right: 4px;
        }

        /* ===== 主导航 ===== */
        .navbar {
            background: #ffffff;
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 4px 24px rgba(8, 20, 40, 0.05);
        }

        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            gap: 24px;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent) 0%, #66e3d0 60%, var(--primary) 130%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 4px 16px rgba(0, 201, 167, 0.3);
        }

        .nav-logo-text {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--primary);
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            display: inline-block;
            padding: 10px 18px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
            position: relative;
        }

        .nav-link:hover {
            color: var(--accent);
            background: rgba(0, 201, 167, 0.08);
        }

        .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(11, 31, 51, 0.25);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-left: auto;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-pill);
            padding: 0 8px 0 16px;
            height: 40px;
            transition: var(--transition);
        }

        .nav-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.15);
            background: #fff;
        }

        .nav-search input {
            min-width: 140px;
            font-size: 14px;
            background: transparent;
            color: var(--text-main);
        }

        .nav-search input::placeholder {
            color: var(--text-weak);
        }

        .nav-search button {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-sub);
            transition: var(--transition);
            font-size: 14px;
        }

        .nav-search button:hover {
            color: var(--accent);
            background: rgba(0, 201, 167, 0.1);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: var(--primary-deep);
            font-weight: 700;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(0, 201, 167, 0.3);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 201, 167, 0.4);
        }

        .nav-toggle {
            display: none;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            background: var(--bg-deep);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            padding: 100px 0 110px;
            color: #fff;
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(115deg, rgba(7, 20, 35, 0.95) 25%, rgba(7, 20, 35, 0.72) 58%, rgba(7, 20, 35, 0.45) 100%);
            z-index: 1;
        }

        .hero::after {
            content: "";
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(0deg, var(--bg-body) 0%, transparent 100%);
            z-index: 2;
        }

        .hero-inner {
            position: relative;
            z-index: 3;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 201, 167, 0.13);
            border: 1px solid rgba(0, 201, 167, 0.4);
            color: var(--accent);
            font-size: 14px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            margin-bottom: 28px;
            backdrop-filter: blur(8px);
        }

        .hero-badge i {
            font-size: 12px;
        }

        .hero h1 {
            font-size: clamp(38px, 5vw, 58px);
            line-height: 1.18;
            font-weight: 800;
            letter-spacing: 1px;
            margin-bottom: 22px;
        }

        .hero h1 .accent-text {
            color: var(--accent);
            position: relative;
        }

        .hero p {
            font-size: 17px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 38px;
            max-width: 600px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 700;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-deep);
            box-shadow: 0 8px 28px rgba(0, 201, 167, 0.32);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(0, 201, 167, 0.45);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.35);
            backdrop-filter: blur(6px);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 201, 167, 0.08);
            transform: translateY(-3px);
        }

        .hero-stats {
            display: flex;
            gap: 48px;
            margin-top: 64px;
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .hero-stat-icon {
            width: 46px;
            height: 46px;
            border-radius: 14px;
            background: rgba(0, 201, 167, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            color: var(--accent);
            border: 1px solid rgba(0, 201, 167, 0.25);
        }

        .hero-stat strong {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            display: block;
            line-height: 1.2;
        }

        .hero-stat span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== 通用区块 ===== */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-header {
            margin-bottom: 52px;
            max-width: 680px;
        }

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

        .section-tag {
            display: inline-block;
            background: rgba(0, 201, 167, 0.1);
            color: #00a98c;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 14px;
            border: 1px solid rgba(0, 201, 167, 0.2);
        }

        .section-header h2 {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.75;
        }

        /* ===== 核心能力卡片 ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 38px 32px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), transparent);
            opacity: 0;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(0, 201, 167, 0.12) 0%, rgba(0, 201, 167, 0.04) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--accent);
            margin-bottom: 24px;
            border: 1px solid rgba(0, 201, 167, 0.2);
        }

        .service-card h3 {
            font-size: 20px;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .service-card p {
            font-size: 14.5px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .service-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .service-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-sub);
        }

        .service-list li i {
            color: var(--accent);
            font-size: 12px;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: block;
            height: 380px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .category-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }

        .category-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        .category-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(7, 20, 35, 0.25) 0%, rgba(7, 20, 35, 0.85) 90%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 30px;
            transition: var(--transition);
        }

        .category-card:hover .category-overlay {
            background: linear-gradient(180deg, rgba(7, 20, 35, 0.15) 0%, rgba(7, 20, 35, 0.9) 85%);
        }

        .category-overlay .cat-tag {
            display: inline-block;
            background: rgba(0, 201, 167, 0.85);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 14px;
            align-self: flex-start;
        }

        .category-overlay h3 {
            font-size: 24px;
            color: #fff;
            font-weight: 800;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }

        .category-overlay p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
        }

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

        /* ===== 数据指标区 ===== */
        .stats-section {
            background: var(--bg-deep);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 100px 0;
        }

        .stats-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(7, 20, 35, 0.9);
        }

        .stats-wrapper {
            position: relative;
            z-index: 2;
        }

        .stats-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .stats-header h2 {
            font-size: clamp(26px, 3vw, 38px);
            color: #fff;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .stats-header p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 16px;
        }

        .stats-header .section-tag {
            background: rgba(0, 201, 167, 0.15);
            border-color: rgba(0, 201, 167, 0.3);
            color: var(--accent);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }

        .stat-item {
            text-align: center;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 40px 20px;
            transition: var(--transition);
            backdrop-filter: blur(4px);
        }

        .stat-item:hover {
            border-color: rgba(0, 201, 167, 0.4);
            background: rgba(0, 201, 167, 0.06);
            transform: translateY(-6px);
        }

        .stat-number {
            font-size: clamp(36px, 4vw, 52px);
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .stat-number sup {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            margin-left: 2px;
        }

        .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== 解决方案展示 ===== */
        .solution-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            padding: 50px 0;
        }

        .solution-block + .solution-block {
            margin-top: 30px;
            border-top: 1px solid var(--border-light);
            padding-top: 80px;
        }

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

        .solution-media img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }

        .solution-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(45deg, rgba(0, 201, 167, 0.12), transparent 50%);
            pointer-events: none;
        }

        .solution-content .sc-tag {
            display: inline-block;
            background: rgba(255, 122, 69, 0.1);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
            border: 1px solid rgba(255, 122, 69, 0.2);
        }

        .solution-content h3 {
            font-size: 24px;
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.4;
        }

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

        .solution-points {
            display: grid;
            gap: 12px;
            margin-bottom: 28px;
        }

        .solution-points li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            color: var(--text-main);
        }

        .solution-points li i {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(0, 201, 167, 0.12);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-pill);
            border: 1.5px solid var(--accent);
            color: var(--accent);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            background: transparent;
        }

        .btn-ghost:hover {
            background: var(--accent);
            color: var(--primary-deep);
            box-shadow: var(--shadow-accent);
            transform: translateY(-2px);
        }

        /* ===== 资讯列表 ===== */
        .news-section {
            background: var(--bg-body);
        }

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

        .news-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

        .news-thumb {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

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

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

        .news-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(7, 20, 35, 0.75);
            color: #fff;
            font-size: 12px;
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .news-body {
            padding: 24px;
        }

        .news-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: var(--transition);
        }

        .news-card:hover .news-body h3 {
            color: var(--accent);
        }

        .news-body p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: 4px;
        }

        .news-meta time {
            font-size: 13px;
            color: var(--text-weak);
        }

        .read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition);
        }

        .news-card:hover .read-more {
            gap: 8px;
        }

        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-light);
            color: var(--text-weak);
            font-size: 15px;
        }

        .news-more {
            text-align: center;
            margin-top: 48px;
        }

        /* ===== 流程 ===== */
        .process-section {
            background: #fff;
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-item {
            text-align: center;
            padding: 36px 18px;
            background: var(--bg-body);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }

        .process-item:hover {
            border-color: var(--accent);
            background: rgba(0, 201, 167, 0.04);
            transform: translateY(-4px);
        }

        .process-step {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            position: relative;
            z-index: 2;
            box-shadow: 0 8px 24px rgba(11, 31, 51, 0.25);
        }

        .process-item:nth-child(2) .process-step {
            background: var(--accent);
            color: var(--primary-deep);
            box-shadow: 0 8px 24px rgba(0, 201, 167, 0.4);
        }

        .process-item:nth-child(4) .process-step {
            background: var(--secondary);
            box-shadow: 0 8px 24px rgba(255, 122, 69, 0.35);
        }

        .process-item h4 {
            font-size: 16px;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 8px;
        }

        .process-item p {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.6;
        }

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

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

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item.active {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            text-align: left;
            transition: var(--transition);
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 201, 167, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-icon {
            background: var(--accent);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 28px 24px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
            border-top: 1px solid var(--border-light);
            padding-top: 18px;
            margin: 0 0 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-deep);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 100px 0;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(7, 20, 35, 0.95) 30%, rgba(7, 20, 35, 0.75));
        }

        .cta-wrap {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }

        .cta-content h2 {
            font-size: clamp(26px, 3.5vw, 38px);
            color: #fff;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.35;
        }

        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.75;
            max-width: 480px;
        }

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

        .cta-phone {
            display: inline-block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            margin-top: 12px;
            width: 100%;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-deep);
            color: rgba(255, 255, 255, 0.55);
            padding-top: 80px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 56px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
        }

        .footer-brand .footer-logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), #66e3d0);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-deep);
            font-size: 18px;
        }

        .footer-brand h4 {
            font-size: 20px;
            color: #fff;
            font-weight: 800;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 280px;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 22px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            margin-bottom: 14px;
        }

        .footer-contact li i {
            color: var(--accent);
            margin-top: 4px;
            width: 16px;
        }

        .footer-bottom {
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ===== 动效 ===== */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal.in-view {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }

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

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

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

            .process-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }

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

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

            .nav-search input {
                min-width: 100px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
                width: 42px;
                height: 42px;
                border-radius: 12px;
                background: var(--bg-body);
                border: 1px solid var(--border-light);
                align-items: center;
                justify-content: center;
                font-size: 18px;
                color: var(--primary);
                transition: var(--transition);
            }

            .nav-toggle.active {
                background: var(--primary);
                color: #fff;
                border-color: var(--primary);
            }

            .nav-toggle i.fa-times {
                display: none;
            }

            .nav-toggle.active i.fa-bars {
                display: none;
            }

            .nav-toggle.active i.fa-times {
                display: block;
            }

            .nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: #fff;
                flex-direction: column;
                padding: 90px 24px 30px;
                transition: right 0.4s ease;
                box-shadow: -10px 0 40px rgba(7, 20, 35, 0.12);
                z-index: 1000;
                justify-content: flex-start;
                gap: 6px;
                overflow-y: auto;
            }

            .nav-menu.active {
                right: 0;
            }

            .nav-menu .nav-link {
                width: 100%;
                padding: 14px 20px;
                text-align: left;
                font-size: 16px;
            }

            .nav-actions {
                margin-left: auto;
            }

            .nav-search {
                display: none;
            }

            .navbar-inner {
                padding: 12px 0;
            }

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

            .hero-stats {
                gap: 28px;
                margin-top: 44px;
            }

            .section {
                padding: 60px 0;
            }

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

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

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

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .topbar-inner {
                flex-wrap: wrap;
                gap: 6px;
            }

            .topbar-links {
                gap: 10px;
            }

            .hero h1 {
                font-size: 30px;
            }

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

            .hero-btns .btn {
                padding: 12px 22px;
                font-size: 14px;
            }

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

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

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

            .cta-wrap {
                flex-direction: column;
                text-align: center;
            }

            .cta-content h2 {
                font-size: 24px;
            }

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

        /* 焦点可访问 */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(0, 201, 167, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }

        input:focus-visible {
            outline: 2px solid rgba(0, 201, 167, 0.4);
            outline-offset: 0;
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root {
  --primary: #0b1b2b;
  --primary-dark: #071220;
  --primary-light: #132a3d;
  --accent: #22d3ee;
  --accent-strong: #0ea5b7;
  --accent-soft: rgba(34, 211, 238, 0.12);
  --gold: #f5b50a;
  --bg: #f4f7fa;
  --bg-white: #ffffff;
  --text: #0f172a;
  --text-light: #5b6b7c;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 10px rgba(11, 27, 43, 0.06);
  --shadow-md: 0 8px 30px rgba(11, 27, 43, 0.09);
  --shadow-lg: 0 18px 50px rgba(11, 27, 43, 0.14);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

ul,
ol {
  list-style: none;
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 30px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  justify-content: center;
  white-space: nowrap;
}

.btn i {
  font-size: 14px;
}

.btn-primary {
  background: var(--accent);
  color: var(--primary-dark);
  box-shadow: 0 8px 24px rgba(34, 211, 238, 0.25);
}

.btn-primary:hover {
  background: #67e8f9;
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(34, 211, 238, 0.35);
}

.btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(6px);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(34, 211, 238, 0.08);
  transform: translateY(-3px);
}

.btn-dark {
  background: var(--primary);
  color: #fff;
}

.btn-dark:hover {
  background: var(--primary-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn:focus-visible {
  outline: 3px solid rgba(34, 211, 238, 0.5);
  outline-offset: 2px;
}

/* ========== 导航 ========== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(11, 27, 43, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.18);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 20px;
  box-shadow: 0 6px 18px rgba(34, 211, 238, 0.35);
}

.nav-logo-text {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
}

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

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

.nav-link {
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  transition: all var(--transition);
  position: relative;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.nav-link.active {
  color: var(--primary-dark);
  background: var(--accent);
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(34, 211, 238, 0.3);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.nav-search {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  padding: 5px 8px 5px 16px;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: border-color var(--transition);
}

.nav-search input {
  color: #fff;
  font-size: 14px;
  width: 130px;
  background: transparent;
}

.nav-search input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

.nav-search input:focus-visible {
  outline: none;
}

.nav-search button {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.nav-search button:hover {
  background: var(--accent);
  color: var(--primary-dark);
}

.nav-cta {
  padding: 9px 20px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition);
  box-shadow: 0 4px 14px rgba(34, 211, 238, 0.25);
}

.nav-cta:hover {
  background: #67e8f9;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(34, 211, 238, 0.35);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
}

.nav-toggle .fa-times {
  display: none;
}

.nav-toggle.open .fa-bars {
  display: none;
}

.nav-toggle.open .fa-times {
  display: block;
}

/* ========== 页面 Hero ========== */
.page-hero {
  position: relative;
  padding: 110px 0 90px;
  background: linear-gradient(135deg, rgba(7, 18, 32, 0.96), rgba(11, 27, 43, 0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 3px solid rgba(34, 211, 238, 0.3);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.2), transparent 70%);
  pointer-events: none;
}

.page-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: linear-gradient(to top, var(--bg), transparent);
  pointer-events: none;
}

.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.page-hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 14px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.page-hero-breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition);
}

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

.page-hero-breadcrumb .sep {
  color: rgba(255, 255, 255, 0.35);
}

.page-hero-breadcrumb .current {
  color: var(--accent);
  font-weight: 600;
}

.page-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid rgba(34, 211, 238, 0.3);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: 1px;
}

.page-hero-title {
  font-size: clamp(36px, 5vw, 54px);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 20px;
}

.page-hero-title span {
  background: linear-gradient(90deg, var(--accent), #67e8f9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-hero-subtitle {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.8;
  margin-bottom: 34px;
  max-width: 620px;
}

.page-hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ========== 通用 Section ========== */
.section {
  padding: 90px 0;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-tag::before {
  content: '';
  width: 28px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(28px, 3.5vw, 38px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.8;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

.section-header .section-title {
  margin-bottom: 6px;
}

.section-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-strong);
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
}

.section-more:hover {
  color: var(--primary);
}

.section-more i {
  transition: transform var(--transition);
}

.section-more:hover i {
  transform: translateX(5px);
}

/* ========== 核心方向卡片 ========== */
.core-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.core-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 34px 26px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.core-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.core-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(34, 211, 238, 0.4);
}

.core-card:hover::after {
  opacity: 1;
}

.core-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: all var(--transition);
}

.core-card:hover .core-icon {
  background: var(--accent);
  color: var(--primary-dark);
  transform: rotate(-6deg) scale(1.05);
}

.core-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.core-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
}

/* ========== 产品矩阵 ========== */
.product-section {
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

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

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(34, 211, 238, 0.35);
}

.product-cover {
  position: relative;
  height: 220px;
  overflow: hidden;
  background: var(--primary);
}

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

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

.product-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 27, 43, 0.35), transparent 40%);
}

.product-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(11, 27, 43, 0.75);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(34, 211, 238, 0.25);
}

.product-info {
  padding: 28px;
}

.product-info h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.product-info p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.75;
  margin-bottom: 18px;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-strong);
}

.product-link i {
  transition: transform var(--transition);
}

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

.product-link:hover i {
  transform: translateX(4px);
}

/* ========== 数据指标（深色HUD） ========== */
.stats-band {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.stats-band::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(34, 211, 238, 0.16), transparent 70%);
  pointer-events: none;
}

.stats-band::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  opacity: 0.08;
  mix-blend-mode: screen;
  pointer-events: none;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  position: relative;
  z-index: 2;
}

.stat-item {
  text-align: center;
  padding: 20px 16px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(34, 211, 238, 0.3);
  transform: translateY(-4px);
}

.stat-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  font-family: "Segoe UI", Roboto, sans-serif;
  letter-spacing: 1px;
}

.stat-num sup {
  font-size: 22px;
  font-weight: 700;
  color: var(--gold);
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 8px;
  letter-spacing: 1px;
}

.stat-divider {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ========== 应用场景 ========== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.scenario-card {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  height: 320px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

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

.scenario-card:hover img {
  transform: scale(1.07);
}

.scenario-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 27, 43, 0.92), rgba(11, 27, 43, 0.25) 60%, rgba(11, 27, 43, 0.1));
  display: flex;
  align-items: flex-end;
  padding: 26px 24px;
  transition: background var(--transition);
}

.scenario-card:hover .scenario-overlay {
  background: linear-gradient(to top, rgba(11, 27, 43, 0.97), rgba(11, 27, 43, 0.35) 60%, rgba(11, 27, 43, 0.15));
}

.scenario-text h3 {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.scenario-text p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
  opacity: 0;
  max-height: 0;
  transition: all 0.45s ease;
}

.scenario-card:hover .scenario-text p {
  opacity: 1;
  max-height: 200px;
}

.scenario-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 14px;
  box-shadow: 0 4px 14px rgba(34, 211, 238, 0.3);
}

/* ========== 技术路径 ========== */
.flow-section {
  background: var(--bg-white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  position: relative;
}

.flow-steps::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong), var(--accent));
  opacity: 0.25;
}

.flow-step {
  text-align: center;
  position: relative;
  z-index: 1;
  padding: 20px 14px;
  transition: all var(--transition);
}

.flow-num {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--accent);
  font-size: 15px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  border: 3px solid rgba(34, 211, 238, 0.3);
  box-shadow: 0 8px 24px rgba(11, 27, 43, 0.15);
  transition: all var(--transition);
}

.flow-step:hover .flow-num {
  background: var(--accent);
  color: var(--primary-dark);
  transform: scale(1.08);
  border-color: var(--accent);
}

.flow-icon {
  font-size: 22px;
  color: var(--accent-strong);
  margin-bottom: 10px;
}

.flow-step h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.flow-step p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.7;
}

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

.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item:hover {
  border-color: rgba(34, 211, 238, 0.35);
  box-shadow: var(--shadow-sm);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: color var(--transition);
}

.faq-q:hover {
  color: var(--accent-strong);
}

.faq-q i {
  color: var(--accent-strong);
  transition: transform var(--transition);
  font-size: 14px;
  flex-shrink: 0;
}

.faq-item.active .faq-q i {
  transform: rotate(180deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease;
  color: var(--text-light);
  font-size: 15px;
  line-height: 1.8;
}

.faq-item.active .faq-a {
  max-height: 400px;
}

.faq-a-inner {
  padding: 0 24px 22px;
  border-top: 1px solid var(--border);
  margin-top: 4px;
  padding-top: 16px;
}

/* ========== CTA ========== */
.cta-band {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(7, 18, 32, 0.97), rgba(11, 27, 43, 0.92)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  bottom: -50%;
  left: 0;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.12), transparent 70%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-title {
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

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

.cta-desc {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  margin-bottom: 34px;
}

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

.cta-note {
  margin-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 50px;
  padding-bottom: 46px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.footer-logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-dark);
  font-size: 17px;
}

.footer-logo h4 {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.85;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 22px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h5::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

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

.footer-col ul li a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition);
}

.footer-col ul li a i {
  font-size: 11px;
  color: var(--accent);
  transition: transform var(--transition);
}

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

.footer-col ul li a:hover i {
  transform: translateX(3px);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.7;
}

.footer-contact li i {
  color: var(--accent);
  margin-top: 4px;
}

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

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

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

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

  .flow-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 30px 16px;
  }

  .flow-steps::before {
    display: none;
  }

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

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

  .nav-search {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    background: var(--primary-dark);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px;
    gap: 8px;
    border-bottom: 2px solid rgba(34, 211, 238, 0.25);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3);
    transform: translateY(-120%);
    transition: transform 0.35s ease;
    z-index: 999;
  }

  .nav-menu.open {
    transform: translateY(0);
  }

  .nav-link {
    display: block;
    padding: 14px 20px;
    border-radius: 12px;
    font-size: 16px;
  }

  .nav-link:hover {
    background: rgba(255, 255, 255, 0.06);
  }

  .nav-link.active {
    background: var(--accent);
    color: var(--primary-dark);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  .page-hero {
    padding: 70px 0 60px;
  }

  .section {
    padding: 60px 0;
  }

  .product-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

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

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .stat-num {
    font-size: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

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

@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }

  .navbar-inner {
    gap: 12px;
  }

  .nav-logo-text {
    font-size: 18px;
  }

  .nav-logo-icon {
    width: 36px;
    height: 36px;
  }

  .page-hero-title {
    font-size: 30px;
  }

  .page-hero-subtitle {
    font-size: 15px;
  }

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

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

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 16px;
  }

  .stats-band {
    padding: 50px 0;
  }

  .stat-num {
    font-size: 28px;
  }

  .stat-label {
    font-size: 12px;
  }

  .section-title {
    font-size: 26px;
  }

  .section-desc {
    font-size: 15px;
  }

  .product-card .product-cover {
    height: 180px;
  }

  .btn {
    width: 100%;
  }

  .page-hero-actions {
    flex-direction: column;
  }

  .cta-actions {
    flex-direction: column;
  }

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

/* roulang page: article */
:root {
            --primary: #0ea5e9;
            --primary-dark: #0369a1;
            --primary-soft: #e0f2fe;
            --accent: #f59e0b;
            --ink: #0b1220;
            --body: #334155;
            --muted: #64748b;
            --border: #e2e8f0;
            --bg-page: #f4f7fb;
            --bg-deep: #0b1220;
            --bg-card: #ffffff;
            --radius-sm: 10px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 4px 16px rgba(15, 23, 42, .06);
            --shadow-lg: 0 18px 50px rgba(15, 23, 42, .12);
            --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.75;
            color: var(--body);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            background: none;
            outline: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: min(1200px, 92%);
            margin-left: auto;
            margin-right: auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: .8rem 1.5rem;
            border-radius: 999px;
            font-weight: 600;
            transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
            border: 1px solid transparent;
            line-height: 1.2;
        }

        .btn:hover {
            transform: translateY(-2px);
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        .footer a:focus-visible,
        .faq-item summary:focus-visible {
            outline: 3px solid rgba(14, 165, 233, .4);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 10px 24px rgba(14, 165, 233, .3);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
        }

        .btn-ghost {
            background: transparent;
            border-color: var(--border);
            color: var(--body);
        }

        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

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

        .btn-outline:hover {
            background: var(--primary-soft);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, .7);
            color: #fff;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .1);
            border-color: #fff;
        }

        .btn-light {
            background: #fff;
            color: var(--ink);
            box-shadow: 0 10px 24px rgba(0, 0, 0, .15);
        }

        .btn-light:hover {
            background: var(--primary-soft);
            color: var(--primary-dark);
        }

        .btn-block {
            width: 100%;
        }

        /* Header */
        .navbar {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 18, 32, .95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 76px;
            gap: 20px;
        }

        .nav-brand {
            display: inline-flex;
            align-items: center;
            gap: .65rem;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #0ea5e9, #38bdf8);
            border-radius: 12px;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 10px 22px rgba(14, 165, 233, .35);
        }

        .nav-logo-text {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: .02em;
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .nav-link {
            position: relative;
            color: rgba(255, 255, 255, .78);
            font-weight: 500;
            padding: .45rem .1rem;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: width .25s ease;
        }

        .nav-link:hover,
        .nav-link.active {
            color: #fff;
        }

        .nav-link.active::after,
        .nav-link:hover::after {
            width: 100%;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: .9rem;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 999px;
            padding-left: .9rem;
            transition: border .25s ease, background .25s ease;
        }

        .nav-search:focus-within {
            border-color: rgba(14, 165, 233, .5);
            background: rgba(255, 255, 255, .14);
        }

        .nav-search input {
            width: 150px;
            padding: .55rem 0;
            color: #fff;
            background: transparent;
        }

        .nav-search input::placeholder {
            color: rgba(255, 255, 255, .5);
        }

        .nav-search button {
            color: rgba(255, 255, 255, .7);
            padding: .55rem 1rem;
            transition: color .25s ease;
        }

        .nav-search button:hover {
            color: var(--accent);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: .6rem 1.15rem;
            border-radius: 999px;
            transition: background .25s ease, transform .25s ease;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            color: #fff;
            font-size: 1.3rem;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
        }

        .nav-toggle .fa-times {
            display: none;
        }

        .nav-toggle.active .fa-times {
            display: block;
        }

        .nav-toggle.active .fa-bars {
            display: none;
        }

        /* Hero */
        .page-hero {
            background: linear-gradient(135deg, rgba(2, 6, 23, .9), rgba(11, 18, 32, .72)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            padding: 88px 0 70px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: .6rem;
            font-size: .88rem;
            color: rgba(255, 255, 255, .62);
            margin-bottom: 1.4rem;
            flex-wrap: wrap;
        }

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

        .breadcrumb i {
            font-size: .7rem;
            color: rgba(255, 255, 255, .4);
        }

        .breadcrumb .current {
            color: #fff;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: .45rem;
            background: rgba(14, 165, 233, .18);
            border: 1px solid rgba(14, 165, 233, .45);
            color: #7dd3fc;
            padding: .4rem 1rem;
            border-radius: 999px;
            font-size: .83rem;
            font-weight: 600;
            margin-bottom: 1.1rem;
        }

        .page-hero h1 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            line-height: 1.25;
            font-weight: 800;
            max-width: 920px;
            letter-spacing: .01em;
        }

        .hero-desc {
            margin-top: 1rem;
            max-width: 820px;
            color: rgba(255, 255, 255, .78);
            font-size: 1.05rem;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: .8rem;
            margin-top: 1.5rem;
        }

        .meta-chip {
            display: inline-flex;
            align-items: center;
            gap: .45rem;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .1);
            padding: .4rem .9rem;
            border-radius: 999px;
            font-size: .85rem;
            color: rgba(255, 255, 255, .85);
        }

        .meta-chip i {
            color: var(--accent);
        }

        /* Article layout */
        .article-section {
            padding: 70px 0;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 330px;
            gap: 32px;
            align-items: start;
        }

        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: clamp(24px, 3vw, 42px);
        }

        .article-content {
            color: #1f2937;
            font-size: 1.02rem;
            line-height: 1.9;
        }

        .article-content h1,
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: var(--ink);
            margin: 1.8em 0 .6em;
            line-height: 1.4;
        }

        .article-content h2 {
            font-size: 1.55rem;
            padding-left: .8rem;
            border-left: 4px solid var(--primary);
            border-radius: 2px;
        }

        .article-content h3 {
            font-size: 1.2rem;
        }

        .article-content p {
            margin-bottom: 1.15em;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.2em 1.3em;
        }

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

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

        .article-content li {
            margin-bottom: .4em;
        }

        .article-content blockquote {
            margin: 1.5rem 0;
            padding: 1rem 1.4rem;
            border-left: 4px solid var(--accent);
            background: #fefce8;
            border-radius: 0 12px 12px 0;
            color: #4b5563;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            overflow: hidden;
            border-radius: var(--radius-md);
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: .75rem 1rem;
            text-align: left;
        }

        .article-content th {
            background: #f8fafc;
            font-weight: 700;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: .6rem;
            margin-top: 2rem;
            padding-top: 1.4rem;
            border-top: 1px solid var(--border);
            color: var(--muted);
            font-size: .9rem;
        }

        .article-tags i {
            color: var(--primary);
        }

        .tag {
            background: #f1f5f9;
            color: var(--body);
            padding: .3rem .8rem;
            border-radius: 999px;
            font-size: .85rem;
            border: 1px solid var(--border);
        }

        .tag:hover {
            background: var(--primary-soft);
            color: var(--primary-dark);
            border-color: rgba(14, 165, 233, .3);
        }

        .article-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: .8rem;
            margin-top: 2rem;
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 22px;
        }

        .side-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 24px;
        }

        .side-card-head {
            display: flex;
            align-items: center;
            gap: .6rem;
            margin-bottom: 1rem;
        }

        .side-card-head i {
            color: var(--primary);
            font-size: 1.1rem;
        }

        .side-card-head h3 {
            color: var(--ink);
            font-size: 1.1rem;
        }

        .side-nav {
            display: flex;
            flex-direction: column;
        }

        .side-nav a {
            padding: .65rem .3rem;
            border-bottom: 1px solid var(--border);
            color: var(--body);
            display: flex;
            align-items: center;
            gap: .6rem;
            font-size: .93rem;
        }

        .side-nav a:last-child {
            border-bottom: none;
        }

        .side-nav a i {
            color: var(--primary);
            width: 20px;
        }

        .side-nav a:hover {
            color: var(--primary);
            padding-left: .6rem;
        }

        .side-figure {
            margin: 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .side-figure img {
            width: 100%;
            height: 190px;
            object-fit: cover;
        }

        .side-figure figcaption {
            padding: .8rem 1rem;
            font-size: .85rem;
            color: var(--muted);
            background: #f8fafc;
        }

        .side-contact p {
            font-size: .92rem;
            margin-bottom: 1rem;
        }

        .side-contact .btn {
            margin-bottom: .6rem;
        }

        /* Capability section */
        .capability-section {
            padding: 80px 0;
            background: var(--bg-deep);
            color: rgba(255, 255, 255, .85);
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 2.8rem;
        }

        .section-eyebrow {
            display: inline-block;
            color: var(--accent);
            font-weight: 700;
            letter-spacing: .08em;
            font-size: .82rem;
            margin-bottom: .6rem;
        }

        .capability-section .section-head h2,
        .faq-section .section-head h2 {
            color: #fff;
        }

        .section-head p {
            margin-top: .8rem;
            font-size: 1rem;
        }

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

        .feature-card {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-lg);
            padding: 30px 26px;
            transition: transform .3s ease, border-color .3s ease, background .3s ease;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(14, 165, 233, .55);
            background: rgba(255, 255, 255, .1);
        }

        .feature-icon {
            width: 54px;
            height: 54px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), #38bdf8);
            border-radius: 14px;
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 1.2rem;
            box-shadow: 0 12px 26px rgba(14, 165, 233, .35);
        }

        .feature-card h3 {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: .8rem;
        }

        .feature-card p {
            color: rgba(255, 255, 255, .68);
            font-size: .94rem;
            margin-bottom: 1.3rem;
        }

        .feature-card a {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            color: var(--accent);
            font-weight: 600;
        }

        .feature-card a i {
            transition: transform .3s ease;
        }

        .feature-card a:hover i {
            transform: translateX(6px);
        }

        /* Stats */
        .stats-band {
            background: linear-gradient(rgba(11, 18, 32, .88), rgba(11, 18, 32, .88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 70px 0;
            border-top: 1px solid rgba(255, 255, 255, .06);
            border-bottom: 1px solid rgba(255, 255, 255, .06);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-lg);
            padding: 30px 20px;
        }

        .stat-item strong {
            display: block;
            font-size: 2.4rem;
            color: #fff;
            line-height: 1.2;
            font-weight: 800;
        }

        .stat-item span {
            display: block;
            margin-top: .4rem;
            color: rgba(255, 255, 255, .65);
            font-size: .95rem;
        }

        /* FAQ */
        .faq-section {
            padding: 80px 0;
            background: var(--bg-page);
        }

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

        .faq-section .section-head h2 {
            color: var(--ink);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: border-color .25s ease, box-shadow .25s ease;
        }

        .faq-item:hover {
            border-color: rgba(14, 165, 233, .4);
            box-shadow: var(--shadow-lg);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.15rem 1.4rem;
            font-weight: 600;
            color: var(--ink);
            cursor: pointer;
            list-style: none;
            user-select: none;
        }

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

        .faq-item summary i {
            color: var(--primary);
            transition: transform .3s ease;
        }

        .faq-item[open] summary i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 1.4rem 1.2rem;
            color: var(--body);
            font-size: .96rem;
            border-top: 1px dashed var(--border);
            margin-top: .2rem;
            padding-top: .8rem;
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(11, 18, 32, .95), rgba(15, 23, 42, .85)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
        }

        .cta-panel {
            display: grid;
            grid-template-columns: 1fr auto;
            align-items: center;
            gap: 30px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .12);
            border-radius: var(--radius-lg);
            padding: clamp(30px, 5vw, 54px);
        }

        .cta-content h2 {
            color: #fff;
            font-size: clamp(1.5rem, 3vw, 2rem);
            margin-bottom: .8rem;
            line-height: 1.3;
        }

        .cta-content p {
            color: rgba(255, 255, 255, .7);
            max-width: 620px;
        }

        .cta-actions {
            display: flex;
            flex-direction: column;
            gap: .9rem;
        }

        /* Not found */
        .notfound-main {
            min-height: 62vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 90px 0;
        }

        .notfound-card {
            text-align: center;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 52px 40px;
            max-width: 580px;
            width: 100%;
        }

        .notfound-card > i {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }

        .notfound-card h1 {
            color: var(--ink);
            margin-bottom: .6rem;
        }

        .notfound-card p {
            color: var(--muted);
            margin-bottom: 1.6rem;
        }

        /* Footer */
        .footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, .72);
            padding: 70px 0 0;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 40px;
            padding-bottom: 50px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: .7rem;
            margin-bottom: 1rem;
        }

        .footer-logo-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), #38bdf8);
            border-radius: 12px;
            color: #fff;
        }

        .footer-logo h4 {
            color: #fff;
            font-size: 1.25rem;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, .6);
            font-size: .95rem;
            max-width: 360px;
        }

        .footer-col h5 {
            color: #fff;
            margin-bottom: 1rem;
            font-size: 1rem;
        }

        .footer-col ul li {
            margin-bottom: .55rem;
        }

        .footer-col ul a {
            color: rgba(255, 255, 255, .65);
            display: inline-flex;
            align-items: center;
            gap: .45rem;
        }

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

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: .6rem;
            color: rgba(255, 255, 255, .65);
        }

        .footer-contact li i {
            color: var(--primary);
            margin-top: .25rem;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            padding: 1.4rem 0;
            color: rgba(255, 255, 255, .48);
            font-size: .86rem;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .article-sidebar {
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

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

        @media (max-width: 768px) {
            .navbar-inner {
                flex-wrap: wrap;
                padding: .8rem 0;
            }

            .nav-menu {
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: .4rem;
                width: 100%;
                padding: .8rem 0;
            }

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

            .nav-link {
                padding: .7rem .3rem;
                border-bottom: 1px solid rgba(255, 255, 255, .06);
            }

            .nav-actions {
                margin-left: auto;
            }

            .nav-search {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
            }

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

            .cta-panel {
                grid-template-columns: 1fr;
            }

            .cta-actions {
                flex-direction: row;
                flex-wrap: wrap;
            }

            .article-sidebar {
                display: flex;
            }
        }

        @media (max-width: 520px) {
            .grid-3 {
                grid-template-columns: 1fr;
            }

            .page-hero {
                padding: 62px 0 48px;
            }

            .hero-meta {
                gap: .5rem;
            }

            .article-card {
                padding: 22px;
            }

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

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

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

            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
            }
        }

/* roulang page: category2 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #60a5fa;
            --accent: #06b6d4;
            --accent-dark: #0891b2;
            --ink: #0f172a;
            --dark: #0b1220;
            --dark-card: #101a30;
            --dark-border: #1e2a44;
            --body-bg: #f6f8fc;
            --card-bg: #ffffff;
            --text: #1e293b;
            --muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 10px 30px rgba(15, 23, 42, .08);
            --shadow-lg: 0 24px 50px rgba(15, 23, 42, .14);
            --transition: all .3s ease;
            --container-w: 1200px;
            --font-scale: 1;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== 导航 ========== */
        .navbar {
            background: rgba(11, 18, 32, .95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
            box-shadow: 0 4px 24px rgba(0, 0, 0, .3);
        }

        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 14px rgba(37, 99, 235, .45);
        }

        .nav-logo-text {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 auto;
        }

        .nav-link {
            position: relative;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, .75);
            border-radius: 8px;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, .06);
        }

        .nav-link.active {
            color: #fff;
            background: rgba(37, 99, 235, .2);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 24px;
            padding: 4px 6px 4px 16px;
            transition: var(--transition);
        }

        .nav-search:focus-within {
            border-color: var(--primary-light);
            background: rgba(255, 255, 255, .12);
        }

        .nav-search input {
            width: 128px;
            background: transparent;
            color: #fff;
            font-size: 14px;
        }

        .nav-search input::placeholder {
            color: rgba(255, 255, 255, .5);
        }

        .nav-search button {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 14px;
            transition: var(--transition);
        }

        .nav-search button:hover {
            transform: scale(1.06);
            box-shadow: 0 0 12px rgba(37, 99, 235, .5);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 9px 18px;
            border-radius: 24px;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(37, 99, 235, .35);
            transition: var(--transition);
        }

        .nav-cta:hover {
            box-shadow: 0 6px 22px rgba(37, 99, 235, .5);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(255, 255, 255, .08);
            color: #fff;
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .nav-toggle .fa-times {
            display: none;
        }

        .nav-toggle.open .fa-bars {
            display: none;
        }

        .nav-toggle.open .fa-times {
            display: inline;
        }

        /* ========== 页面 Banner ========== */
        .page-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 110px 0 100px;
            overflow: hidden;
            display: flex;
            align-items: center;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(11, 18, 32, .92) 0%, rgba(11, 18, 32, .75) 45%, rgba(37, 99, 235, .45) 100%);
        }

        .page-hero::after {
            content: "";
            position: absolute;
            width: 480px;
            height: 480px;
            right: -120px;
            top: -120px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(6, 182, 212, .25), transparent 70%);
            pointer-events: none;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(6, 182, 212, .15);
            border: 1px solid rgba(6, 182, 212, .35);
            color: #5eead4;
            padding: 7px 16px;
            border-radius: 24px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: .5px;
        }

        .page-hero h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            max-width: 720px;
            margin-bottom: 18px;
            letter-spacing: 2px;
        }

        .page-hero h1 .highlight {
            color: var(--accent);
        }

        .page-hero .hero-desc {
            font-size: 18px;
            color: rgba(255, 255, 255, .85);
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 34px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 28px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: 1px solid transparent;
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 6px 20px rgba(37, 99, 235, .4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(37, 99, 235, .5);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .4);
        }

        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, .1);
            transform: translateY(-2px);
        }

        /* ========== 通用板块 ========== */
        .section {
            padding: 90px 0;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            background: rgba(37, 99, 235, .08);
            border: 1px solid rgba(37, 99, 235, .15);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 38px;
            font-weight: 800;
            color: var(--ink);
            line-height: 1.25;
            margin-bottom: 14px;
        }

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

        /* ========== 核心服务卡片 ========== */
        .services-section {
            background: var(--body-bg);
        }

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

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 34px 28px;
            position: relative;
            overflow: hidden;
            transition: var(--transition);
        }

        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .5s ease;
        }

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

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

        .service-icon {
            width: 58px;
            height: 58px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(37, 99, 235, .1), rgba(6, 182, 212, .1));
            border: 1px solid rgba(37, 99, 235, .15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .service-card:hover .service-icon {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 8px 20px rgba(37, 99, 235, .35);
            transform: scale(1.05) rotate(-3deg);
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 18px;
        }

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

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 16px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(37, 99, 235, .06);
            color: var(--primary);
            border: 1px solid rgba(37, 99, 235, .12);
        }

        .tag.accent {
            background: rgba(6, 182, 212, .06);
            color: var(--accent-dark);
            border-color: rgba(6, 182, 212, .14);
        }

        /* ========== 对比面板 / HUD ========== */
        .compare-section {
            background: var(--dark);
            position: relative;
            overflow: hidden;
        }

        .compare-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: .1;
        }

        .compare-section .section-head h2,
        .compare-section .section-head p {
            color: #fff;
        }

        .compare-section .section-head p {
            color: rgba(255, 255, 255, .65);
        }

        .section-tag.light {
            background: rgba(6, 182, 212, .12);
            border-color: rgba(6, 182, 212, .3);
            color: #5eead4;
        }

        .compare-panel {
            position: relative;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-top: 20px;
        }

        .compare-box {
            border-radius: var(--radius-lg);
            padding: 40px 34px;
            border: 1px solid var(--dark-border);
            background: rgba(16, 26, 48, .8);
            backdrop-filter: blur(10px);
            transition: var(--transition);
        }

        .compare-box:hover {
            border-color: rgba(6, 182, 212, .3);
            transform: translateY(-4px);
        }

        .compare-box.traditional {
            border-color: rgba(255, 255, 255, .08);
        }

        .compare-box.recommend {
            border-color: rgba(6, 182, 212, .25);
            background: linear-gradient(145deg, rgba(16, 26, 48, .9), rgba(37, 99, 235, .12));
            box-shadow: 0 0 40px rgba(6, 182, 212, .08);
        }

        .compare-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 18px;
        }

        .compare-box.traditional .compare-label {
            background: rgba(255, 255, 255, .06);
            color: rgba(255, 255, 255, .7);
        }

        .compare-box.recommend .compare-label {
            background: rgba(6, 182, 212, .15);
            color: #5eead4;
            border: 1px solid rgba(6, 182, 212, .3);
        }

        .compare-box h3 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }

        .compare-box.recommend h3 {
            background: linear-gradient(135deg, #fff, #5eead4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .compare-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-bottom: 26px;
        }

        .compare-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: rgba(255, 255, 255, .75);
        }

        .compare-item i {
            flex-shrink: 0;
            margin-top: 3px;
        }

        .compare-item .fa-check {
            color: #34d399;
        }

        .compare-item .fa-xmark {
            color: #f87171;
        }

        .compare-note {
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
            padding-top: 16px;
            border-top: 1px solid var(--dark-border);
        }

        /* ========== 路径图 ========== */
        .roadmap-section {
            background: #fff;
        }

        .roadmap-wrap {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 24px;
            position: relative;
            padding: 10px 0;
        }

        .roadmap-wrap::before {
            content: "";
            position: absolute;
            top: 45px;
            left: 60px;
            right: 60px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            border-radius: 2px;
            opacity: .3;
        }

        .roadmap-step {
            position: relative;
            text-align: center;
            flex: 1;
            padding: 0 8px;
        }

        .step-icon {
            width: 90px;
            height: 90px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(37, 99, 235, .1), rgba(6, 182, 212, .1));
            border: 2px solid rgba(37, 99, 235, .2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            position: relative;
            transition: var(--transition);
        }

        .roadmap-step:hover .step-icon {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            border-color: transparent;
            box-shadow: 0 10px 30px rgba(37, 99, 235, .35);
            transform: scale(1.06);
        }

        .step-num {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--ink);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid #fff;
        }

        .roadmap-step h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .roadmap-step p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
        }

        /* ========== 数据指标 ========== */
        .metrics-section {
            background: var(--dark);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }

        .metrics-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: .08;
        }

        .metrics-section::after {
            content: "";
            position: absolute;
            width: 400px;
            height: 400px;
            left: -120px;
            bottom: -160px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(37, 99, 235, .2), transparent 70%);
            pointer-events: none;
        }

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

        .metric-item {
            text-align: center;
            padding: 36px 20px;
            border-radius: var(--radius);
            background: rgba(16, 26, 48, .7);
            border: 1px solid var(--dark-border);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .metric-item:hover {
            border-color: rgba(6, 182, 212, .3);
            transform: translateY(-4px);
        }

        .metric-num {
            font-size: 44px;
            font-weight: 800;
            background: linear-gradient(135deg, #fff, #5eead4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 10px;
            font-family: "DIN Alternate", "Bahnschrift", "Segoe UI", sans-serif;
            letter-spacing: 1px;
        }

        .metric-item p {
            font-size: 15px;
            color: rgba(255, 255, 255, .7);
        }

        .metric-item i {
            font-size: 20px;
            color: var(--accent);
            margin-bottom: 16px;
            display: block;
        }

        /* ========== 案例 ========== */
        .cases-section {
            background: var(--body-bg);
        }

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

        .case-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .case-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-8px);
        }

        .case-cover {
            height: 200px;
            position: relative;
            overflow: hidden;
        }

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

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

        .case-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 18, 32, .35), transparent 60%);
        }

        .case-industry {
            position: absolute;
            left: 16px;
            bottom: 14px;
            z-index: 2;
            background: rgba(6, 182, 212, .9);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 16px;
        }

        .case-body {
            padding: 26px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .case-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .case-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 18px;
            flex: 1;
        }

        .case-result {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .case-result i {
            transition: transform .3s ease;
        }

        .case-card:hover .case-result i {
            transform: translateX(4px);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: #fff;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(37, 99, 235, .25);
            box-shadow: var(--shadow);
        }

        .faq-item.open {
            border-color: rgba(37, 99, 235, .3);
            box-shadow: var(--shadow);
        }

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

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

        .faq-icon {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: rgba(37, 99, 235, .08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--primary);
            flex-shrink: 0;
            margin-left: 16px;
            transition: var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 22px;
            font-size: 15px;
            color: var(--muted);
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 90px 0;
            background: linear-gradient(135deg, #0b1220, #101a30, #16254d);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -80px;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(6, 182, 212, .2), transparent 70%);
        }

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

        .cta-inner h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, .7);
            margin-bottom: 34px;
            line-height: 1.7;
        }

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

        #contact {
            scroll-margin-top: 100px;
        }

        /* ========== 页脚 ========== */
        .footer {
            background: #060b14;
            color: rgba(255, 255, 255, .7);
            padding: 70px 0 0;
            position: relative;
        }

        .footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(6, 182, 212, .4), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 18px;
        }

        .footer-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }

        .footer-logo h4 {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 340px;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-col ul li a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, .6);
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-col ul li a i {
            font-size: 12px;
            color: rgba(255, 255, 255, .35);
            transition: var(--transition);
        }

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

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
        }

        .footer-contact li i {
            color: var(--accent);
            font-size: 15px;
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .06);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        /* ========== 移动端导航 ========== */
        @media (max-width: 1024px) {
            .nav-search {
                display: none;
            }
        }

        @media (max-width: 900px) {
            .navbar-inner {
                height: 64px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-menu {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(11, 18, 32, .98);
                flex-direction: column;
                padding: 24px;
                gap: 8px;
                border-bottom: 1px solid rgba(255, 255, 255, .06);
                transform: translateY(-120%);
                transition: transform .4s ease;
                z-index: 999;
                align-items: stretch;
                backdrop-filter: blur(20px);
            }

            .nav-menu.open {
                transform: translateY(0);
            }

            .nav-link {
                padding: 14px 16px;
                font-size: 16px;
                color: rgba(255, 255, 255, .8);
            }

            .nav-link.active {
                background: rgba(37, 99, 235, .2);
            }

            .nav-cta {
                display: none;
            }

            .page-hero h1 {
                font-size: 38px;
            }

            .page-hero {
                padding: 90px 0 80px;
            }

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

            .compare-panel {
                grid-template-columns: 1fr;
            }

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

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

            .roadmap-wrap {
                flex-direction: column;
                gap: 36px;
            }

            .roadmap-wrap::before {
                display: none;
            }

            .roadmap-step {
                display: flex;
                align-items: center;
                text-align: left;
                gap: 20px;
            }

            .step-icon {
                margin: 0;
                flex-shrink: 0;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .page-hero {
                padding: 70px 0 60px;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .page-hero .hero-desc {
                font-size: 15px;
            }

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

            .btn {
                justify-content: center;
            }

            .section {
                padding: 60px 0;
            }

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

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

            .compare-box {
                padding: 30px 22px;
            }

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

            .metric-num {
                font-size: 32px;
            }

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

            .roadmap-step {
                flex-direction: column;
                text-align: center;
                gap: 14px;
            }

            .step-icon {
                margin: 0 auto;
            }

            .faq-question {
                font-size: 15px;
                padding: 18px 18px;
            }

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

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }

            .cta-inner h2 {
                font-size: 28px;
            }

            .cta-actions {
                flex-direction: column;
            }

            .nav-logo-text {
                font-size: 20px;
            }
        }

        @media (max-width: 360px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #0ea5e9;
            --primary-dark: #0369a1;
            --accent: #22d3ee;
            --accent-glow: rgba(34, 211, 238, 0.35);
            --bg: #0b1120;
            --bg-deep: #070d19;
            --bg-card: #111c30;
            --bg-card-hover: #16233d;
            --text: #e2e8f0;
            --text-weak: #94a3b8;
            --border: rgba(148, 163, 184, 0.14);
            --border-light: rgba(148, 163, 184, 0.25);
            --radius: 16px;
            --radius-lg: 24px;
            --shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 28px 64px rgba(0, 0, 0, 0.45);
            --space-section: 110px;
            --max-w: 1280px;
            --transition: 0.3s cubic-bezier(0.22, 1, 0.36, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Noto Sans SC', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        button,
        input {
            font: inherit;
            border: none;
            outline: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 32px;
        }

        .section {
            padding: var(--space-section) 0;
            position: relative;
        }

        /* 导航 */
        .navbar {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(7, 13, 25, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
        }

        .navbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 78px;
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 12px;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
        }

        .nav-logo-text {
            font-size: 22px;
            font-weight: 900;
            letter-spacing: 1px;
            color: var(--text);
            white-space: nowrap;
        }

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

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
        }

        .nav-link {
            position: relative;
            padding: 8px 20px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 20px;
            right: 20px;
            bottom: 3px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }

        .nav-link:hover {
            color: var(--text);
            background: rgba(14, 165, 233, 0.08);
        }

        .nav-link:hover::after {
            transform: scaleX(1);
        }

        .nav-link.active {
            color: var(--accent);
            background: rgba(14, 165, 233, 0.1);
            font-weight: 600;
        }

        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
            margin-left: 12px;
        }

        .nav-search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search input {
            width: 0;
            padding: 0;
            border: 1px solid transparent;
            background: transparent;
            color: var(--text);
            font-size: 14px;
            border-radius: 8px;
            transition: all var(--transition);
        }

        .nav-search input::placeholder {
            color: var(--text-weak);
        }

        .nav-search button {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-weak);
            border-radius: 8px;
            cursor: pointer;
            transition: all var(--transition);
        }

        .nav-search:hover input,
        .nav-search input:focus {
            width: 180px;
            padding: 8px 14px;
            border-color: var(--border-light);
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-search:hover button,
        .nav-search input:focus+button {
            color: var(--accent);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            border-radius: 12px;
            transition: all var(--transition);
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(14, 165, 233, 0.3);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(34, 211, 238, 0.4);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: var(--text);
            background: rgba(255, 255, 255, 0.04);
            cursor: pointer;
            transition: all var(--transition);
        }

        .nav-toggle i.fa-times {
            display: none;
        }

        .nav-toggle.active i.fa-bars {
            display: none;
        }

        .nav-toggle.active i.fa-times {
            display: block;
        }

        /* 页面 Hero */
        .page-hero {
            position: relative;
            padding: 150px 0 120px;
            overflow: hidden;
            background-size: cover;
            background-position: center;
            background-color: var(--bg-deep);
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 13, 25, 0.85) 0%, rgba(7, 13, 25, 0.75) 50%, var(--bg) 100%);
            z-index: 1;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, var(--accent-glow), transparent 70%);
            z-index: 0;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border: 1px solid var(--border-light);
            border-radius: 100px;
            font-size: 13px;
            font-weight: 500;
            color: var(--accent);
            background: rgba(34, 211, 238, 0.08);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 28px;
        }

        .hero-badge i {
            font-size: 12px;
        }

        .page-hero h1 {
            font-size: 60px;
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 20px;
            letter-spacing: -2px;
        }

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

        .page-hero p {
            font-size: 18px;
            color: var(--text-weak);
            max-width: 640px;
            margin-bottom: 40px;
            line-height: 1.8;
        }

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

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            box-shadow: 0 8px 28px rgba(14, 165, 233, 0.35);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 40px rgba(34, 211, 238, 0.45);
        }

        .btn-primary:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 12px;
            border: 1px solid var(--border-light);
            color: var(--text);
            font-weight: 500;
            font-size: 15px;
            background: rgba(255, 255, 255, 0.02);
            transition: all var(--transition);
            cursor: pointer;
        }

        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-3px);
            background: rgba(34, 211, 238, 0.05);
        }

        /* 板块标题 */
        .section-head {
            text-align: center;
            margin-bottom: 64px;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 100px;
            background: rgba(14, 165, 233, 0.12);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-weak);
            max-width: 600px;
            margin: 0 auto;
        }

        /* 趋势方向卡片 */
        .trends {
            background: var(--bg);
        }

        .trend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .trend-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            position: relative;
            overflow: hidden;
            transition: all var(--transition);
        }

        .trend-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }

        .trend-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-light);
        }

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

        .trend-icon {
            width: 64px;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(34, 211, 238, 0.1));
            border: 1px solid rgba(34, 211, 238, 0.3);
            font-size: 26px;
            color: var(--accent);
            margin-bottom: 24px;
        }

        .trend-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 14px;
        }

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

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

        .trend-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-weak);
            transition: all var(--transition);
        }

        .trend-links a i {
            font-size: 12px;
            color: var(--accent);
        }

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

        /* 深度解读 */
        .deep {
            background: var(--bg-deep);
            position: relative;
        }

        .deep::before {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 300px;
            background: linear-gradient(180deg, transparent, rgba(14, 165, 233, 0.04));
            pointer-events: none;
        }

        .deep-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            margin-bottom: 80px;
        }

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

        .deep-media img {
            width: 100%;
            height: 460px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .deep-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(7, 13, 25, 0.9) 100%);
        }

        .deep-media-caption {
            position: absolute;
            left: 32px;
            bottom: 28px;
            right: 32px;
            z-index: 2;
        }

        .deep-media-caption h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .deep-media-caption p {
            font-size: 14px;
            color: var(--text-weak);
        }

        .deep-content h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 20px;
        }

        .deep-content p {
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.9;
            margin-bottom: 28px;
        }

        .deep-features {
            display: flex;
            flex-direction: column;
            gap: 18px;
            margin-top: 8px;
        }

        .deep-feature {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 24px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border);
            border-radius: 14px;
            transition: all var(--transition);
        }

        .deep-feature:hover {
            border-color: var(--border-light);
            background: rgba(255, 255, 255, 0.04);
            transform: translateX(6px);
        }

        .deep-feature i {
            font-size: 18px;
            color: var(--accent);
            margin-top: 4px;
            flex-shrink: 0;
        }

        .deep-feature h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }

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

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

        .tech-item {
            text-align: center;
            padding: 32px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: all var(--transition);
        }

        .tech-item:hover {
            transform: translateY(-6px);
            border-color: var(--border-light);
            box-shadow: var(--shadow);
        }

        .tech-item i {
            font-size: 32px;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .tech-item h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .tech-item p {
            font-size: 13px;
            color: var(--text-weak);
            line-height: 1.6;
        }

        /* 数据指标 */
        .metrics {
            background: var(--bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .metric-item {
            text-align: center;
            padding: 40px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            position: relative;
            overflow: hidden;
            transition: all var(--transition);
        }

        .metric-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 0 0 4px 4px;
        }

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

        .metric-num {
            display: block;
            font-size: 48px;
            font-weight: 900;
            letter-spacing: -1px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 15px;
            color: var(--text-weak);
            font-weight: 500;
        }

        /* 技术路线 */
        .roadmap {
            background: var(--bg-deep);
        }

        .roadmap-list {
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            padding-left: 32px;
        }

        .roadmap-list::before {
            content: "";
            position: absolute;
            left: 10px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--primary), var(--accent), transparent);
        }

        .roadmap-item {
            position: relative;
            padding: 0 0 48px 40px;
        }

        .roadmap-dot {
            position: absolute;
            left: -31px;
            top: 8px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--bg-deep);
            border: 3px solid var(--primary);
            box-shadow: 0 0 0 5px rgba(14, 165, 233, 0.15);
        }

        .roadmap-item.active .roadmap-dot {
            border-color: var(--accent);
            box-shadow: 0 0 0 5px rgba(34, 211, 238, 0.25), 0 0 20px var(--accent-glow);
        }

        .roadmap-content {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 32px;
            transition: all var(--transition);
        }

        .roadmap-content:hover {
            border-color: var(--border-light);
            transform: translateX(4px);
        }

        .roadmap-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(14, 165, 233, 0.15);
            color: var(--accent);
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .roadmap-content h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }

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

        /* 资讯列表 */
        .news {
            background: var(--bg);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
        }

        .news-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-light);
        }

        .news-media {
            position: relative;
            height: 220px;
            overflow: hidden;
        }

        .news-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .news-card:hover .news-media img {
            transform: scale(1.08);
        }

        .news-category {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 5px 14px;
            border-radius: 100px;
            background: rgba(7, 13, 25, 0.75);
            backdrop-filter: blur(8px);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            border: 1px solid var(--border-light);
        }

        .news-body {
            padding: 28px;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 14px;
            font-size: 13px;
            color: var(--text-weak);
        }

        .news-meta i {
            margin-right: 4px;
            font-size: 12px;
        }

        .news-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 12px;
            transition: color var(--transition);
        }

        .news-card:hover .news-body h3 {
            color: var(--accent);
        }

        .news-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .news-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            transition: all var(--transition);
        }

        .news-link:hover {
            gap: 14px;
        }

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

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        details.faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }

        details.faq-item:hover {
            border-color: var(--border-light);
        }

        details.faq-item[open] {
            border-color: rgba(34, 211, 238, 0.3);
            box-shadow: var(--shadow);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 28px;
            font-size: 17px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            user-select: none;
            transition: all var(--transition);
        }

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

        .faq-item summary i {
            flex-shrink: 0;
            color: var(--accent);
            transition: transform var(--transition);
        }

        details.faq-item[open] summary i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 28px 24px;
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 20px;
        }

        /* CTA */
        .cta {
            background: var(--bg);
            border-top: 1px solid var(--border);
        }

        .cta-box {
            position: relative;
            text-align: center;
            padding: 80px 60px;
            background: linear-gradient(135deg, rgba(14, 165, 233, 0.12), rgba(34, 211, 238, 0.06));
            border: 1px solid var(--border-light);
            border-radius: calc(var(--radius-lg) * 1.5);
            overflow: hidden;
        }

        .cta-box::before {
            content: "";
            position: absolute;
            top: -100px;
            left: -100px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, var(--accent-glow), transparent 70%);
            pointer-events: none;
        }

        .cta-box h2 {
            font-size: 38px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-box p {
            font-size: 16px;
            color: var(--text-weak);
            max-width: 540px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

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

        /* 页脚 */
        .footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            padding: 72px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 56px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 18px;
        }

        .footer-logo-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            font-size: 17px;
            color: #fff;
        }

        .footer-logo h4 {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.9;
            max-width: 320px;
        }

        .footer-col h5 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 12px;
        }

        .footer-col h5::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 32px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-weak);
            transition: all var(--transition);
        }

        .footer-col a i {
            font-size: 11px;
            color: var(--accent);
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 6px;
        }

        .footer-contact i {
            width: 20px;
            color: var(--accent);
            text-align: center;
            font-size: 14px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-weak);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .container {
                padding: 0 24px;
            }

            .section {
                --space-section: 80px;
            }

            .nav-menu {
                position: fixed;
                top: 78px;
                right: -100%;
                width: 320px;
                height: calc(100vh - 78px);
                flex-direction: column;
                align-items: flex-start;
                background: var(--bg-deep);
                border-left: 1px solid var(--border);
                padding: 32px 28px;
                gap: 12px;
                transition: right 0.4s cubic-bezier(0.22, 1, 0.36, 1);
                overflow-y: auto;
            }

            .nav-menu.active {
                right: 0;
            }

            .nav-link {
                width: 100%;
                font-size: 16px;
                padding: 14px;
            }

            .nav-link::after {
                display: none;
            }

            .nav-link.active {
                background: rgba(14, 165, 233, 0.1);
            }

            .nav-actions {
                margin-left: auto;
            }

            .nav-search {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .trend-grid {
                grid-template-columns: 1fr;
                max-width: 560px;
                margin: 0 auto;
            }

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

            .deep-media img {
                height: 380px;
            }

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

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

            .news-grid {
                grid-template-columns: 1fr;
                max-width: 560px;
                margin: 0 auto;
            }

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

            .page-hero h1 {
                font-size: 44px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }

            .section {
                --space-section: 64px;
            }

            .nav-cta {
                font-size: 0;
                padding: 12px;
            }

            .nav-cta i {
                font-size: 16px;
            }

            .page-hero {
                padding: 110px 0 80px;
            }

            .page-hero h1 {
                font-size: 36px;
            }

            .page-hero p {
                font-size: 16px;
            }

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

            .deep-content h2 {
                font-size: 26px;
            }

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

            .metric-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
                margin: 0 auto;
            }

            .roadmap-list {
                padding-left: 20px;
            }

            .roadmap-item {
                padding-left: 24px;
            }

            .roadmap-dot {
                left: -25px;
                width: 16px;
                height: 16px;
            }

            .cta-box {
                padding: 48px 24px;
            }

            .cta-box h2 {
                font-size: 28px;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .nav-logo-text {
                font-size: 18px;
            }

            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .hero-actions {
                flex-direction: column;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-ghost {
                justify-content: center;
                width: 100%;
            }

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

            .section-head p {
                font-size: 14px;
            }

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

            .footer-brand p {
                max-width: 100%;
            }

            .cta-box {
                padding: 40px 20px;
            }

            .cta-actions {
                flex-direction: column;
            }

            .cta-actions .btn-primary,
            .cta-actions .btn-ghost {
                width: 100%;
                justify-content: center;
            }

            .metric-num {
                font-size: 40px;
            }
        }