:root {
            --primary: #6366f1;
            --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #ec4899 100%);
            --secondary-gradient: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 100%);
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --border-color: #e2e8f0;
            --accent-pink: #ec4899;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 10px 25px -5px rgba(99, 102, 241, 0.1), 0 8px 10px -6px rgba(99, 102, 241, 0.05);
            --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo-area {
            display: flex;
            align-items: center;
        }

        .logo-area img {
            height: 40px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            gap: 24px;
            list-style: none;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.2s;
        }

        .nav-menu a:hover {
            color: var(--primary);
        }

        .nav-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 18px;
            border-radius: 99px;
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
        }

        .nav-btn-primary {
            background: var(--primary-gradient);
            color: white !important;
            box-shadow: 0 4px 14px rgba(236, 72, 153, 0.3);
        }

        .nav-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(236, 72, 153, 0.4);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-main);
        }

        /* 潮流卡片与通用布局 */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px auto;
        }

        .section-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: #ffffff;
            background: var(--secondary-gradient);
            border-radius: 99px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
        }

        /* Hero 首屏 (无图片) */
        .hero-section {
            background: radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
                        #ffffff;
            padding: 100px 0 80px 0;
            text-align: center;
        }

        .hero-title {
            font-size: 48px;
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 24px;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
        }

        .hero-subtitle {
            font-size: 20px;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 36px auto;
            font-weight: 400;
        }

        .hero-cta {
            display: flex;
            gap: 16px;
            justify-content: center;
            align-items: center;
            margin-bottom: 60px;
            flex-wrap: wrap;
        }

        .btn-large {
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 700;
            border-radius: 8px;
            text-decoration: none;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-gradient {
            background: var(--primary-gradient);
            color: #ffffff;
            box-shadow: 0 4px 20px rgba(236, 72, 153, 0.25);
        }

        .btn-gradient:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(236, 72, 153, 0.35);
        }

        .btn-outline {
            background: #ffffff;
            color: var(--text-main);
            border: 2px solid var(--border-color);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(99, 102, 241, 0.02);
            transform: translateY(-2px);
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 12px;
            text-align: left;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary-gradient);
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .stat-num {
            font-size: 36px;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .stat-desc {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 平台介绍 */
        .platform-intro {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text-main);
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 16px;
            font-size: 15px;
            line-height: 1.7;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 24px;
        }

        .feature-mini {
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .feature-mini-icon {
            color: var(--accent-pink);
            font-weight: 900;
        }

        .feature-mini-text h4 {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .feature-mini-text p {
            font-size: 12px;
            margin: 0;
        }

        .about-badge-card {
            background: var(--bg-light);
            border: 2px dashed var(--primary);
            border-radius: 16px;
            padding: 30px;
            text-align: center;
        }

        .badge-title {
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .badge-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

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

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 32px;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(99, 102, 241, 0.3);
        }

        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--secondary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 20px;
            margin-bottom: 24px;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-grow: 1;
        }

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

        .service-tag-item {
            font-size: 11px;
            background: var(--bg-light);
            color: var(--primary);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 500;
        }

        /* 流程步骤 */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .flow-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            position: relative;
            transition: all 0.3s;
        }

        .flow-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
        }

        .flow-step {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 30px;
            height: 30px;
            background: var(--primary-gradient);
            border-radius: 50%;
            color: white;
            font-size: 14px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(236,72,153,0.3);
        }

        .flow-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-top: 10px;
            margin-bottom: 8px;
        }

        .flow-card p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .solution-item {
            background: var(--bg-card);
            border-radius: 12px;
            border: 1px solid var(--border-color);
            padding: 28px;
            transition: all 0.3s;
        }

        .solution-item:hover {
            border-color: var(--accent-pink);
            box-shadow: var(--shadow-md);
        }

        .solution-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .solution-item h3::before {
            content: "✓";
            color: var(--accent-pink);
            font-weight: bold;
        }

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

        /* 全国服务网络 + 技术标准 */
        .network-section {
            background: #ffffff;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .network-list {
            list-style: none;
        }

        .network-list li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 12px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .network-list li::before {
            content: "•";
            color: var(--primary);
            font-size: 24px;
            position: absolute;
            left: 6px;
            top: -4px;
        }

        .tech-standards-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .tech-standard-card {
            background: var(--bg-light);
            border-radius: 8px;
            padding: 16px;
            border: 1px solid var(--border-color);
        }

        .tech-standard-card h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .tech-standard-card p {
            font-size: 12px;
            color: var(--text-muted);
            margin: 0;
        }

        /* 案例展示 */
        .cases-grid {
            display: grid;
            grid-template-columns: 2fr 1.5fr;
            gap: 30px;
            align-items: stretch;
        }

        .case-left {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .case-main-img {
            background: var(--bg-card);
            border-radius: 16px;
            border: 1px solid var(--border-color);
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .case-main-img img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            object-fit: cover;
            margin-bottom: 16px;
        }

        .case-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .case-title {
            font-size: 18px;
            font-weight: 700;
        }

        .case-desc {
            font-size: 13px;
            color: var(--text-muted);
        }

        .case-sub-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .case-sub-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 16px;
            text-align: center;
        }

        .case-sub-item img {
            width: 100%;
            height: 120px;
            object-fit: cover;
            border-radius: 6px;
            margin-bottom: 10px;
        }

        .case-sub-item h4 {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .case-right-card {
            background: var(--primary-gradient);
            border-radius: 16px;
            padding: 40px 30px;
            color: white;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .case-right-card h3 {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .case-right-card p {
            font-size: 14px;
            opacity: 0.9;
            margin-bottom: 30px;
        }

        .case-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            border-top: 1px solid rgba(255,255,255,0.2);
            padding-top: 24px;
        }

        .case-stat-item h5 {
            font-size: 24px;
            font-weight: 800;
        }

        .case-stat-item p {
            font-size: 11px;
            opacity: 0.7;
            margin: 0;
        }

        /* 对比评测表格 */
        .evaluation-table-container {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            overflow-x: auto;
            margin-bottom: 40px;
            box-shadow: var(--shadow-sm);
        }

        .evaluation-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .evaluation-table th, .evaluation-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        .evaluation-table th {
            font-weight: 700;
            background: var(--bg-light);
            color: var(--text-main);
        }

        .evaluation-table td strong {
            color: var(--primary);
        }

        .badge-five-star {
            display: inline-flex;
            align-items: center;
            background: #fef3c7;
            color: #d97706;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 12px;
        }

        .badge-score {
            display: inline-flex;
            align-items: center;
            background: #ecfdf5;
            color: #059669;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 12px;
        }

        /* Token 比价 */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .token-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            transition: all 0.3s;
        }

        .token-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .token-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 12px;
            border-bottom: 1px dashed var(--border-color);
            padding-bottom: 10px;
        }

        .token-name {
            font-weight: 700;
            font-size: 15px;
        }

        .token-price {
            color: #10b981;
            font-weight: 800;
            font-size: 16px;
        }

        .token-detail {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            justify-content: space-between;
            margin-bottom: 4px;
        }

        /* 培训体系 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .training-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            transition: all 0.3s;
        }

        .training-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .training-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px auto;
            font-weight: 800;
        }

        .training-card h3 {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }

        .training-card p {
            font-size: 11px;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* 用户评论 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .comment-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            position: relative;
        }

        .comment-quote {
            color: var(--primary);
            font-size: 32px;
            line-height: 1;
            font-family: Georgia, serif;
            position: absolute;
            top: 10px;
            left: 15px;
            opacity: 0.2;
        }

        .comment-text {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 12px;
        }

        .comment-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: white;
            font-size: 14px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .comment-info h4 {
            font-size: 13px;
            font-weight: 700;
        }

        .comment-info p {
            font-size: 11px;
            color: var(--text-muted);
        }

        /* 帮助中心 & 自助排查 & 百科 */
        .help-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .accordion-item {
            border-bottom: 1px solid var(--border-color);
            padding: 16px 0;
        }

        .accordion-header {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 8px 0;
        }

        .accordion-header::after {
            content: "+";
            font-size: 20px;
            color: var(--primary);
            transition: transform 0.2s;
        }

        .accordion-item.active .accordion-header::after {
            content: "−";
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.2s ease-out;
            font-size: 14px;
            color: var(--text-muted);
            padding-top: 8px;
        }

        .accordion-item.active .accordion-content {
            max-height: 200px;
        }

        .help-sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .sidebar-box {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
        }

        .sidebar-box h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 8px;
            display: inline-block;
        }

        .trouble-list {
            list-style: none;
        }

        .trouble-list li {
            font-size: 13px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .trouble-list li span {
            color: var(--accent-pink);
            font-weight: bold;
        }

        .glossary-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
        }

        .glossary-item h4 {
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 2px;
        }

        .glossary-item p {
            font-size: 11px;
            color: var(--text-muted);
        }

        /* 行业资讯 / 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 16px;
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            height: 100%;
        }

        .news-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .news-card h3 {
            font-size: 13px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-date {
            font-size: 11px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .news-link {
            font-size: 12px;
            color: var(--primary);
            text-decoration: none;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .news-link:hover {
            color: var(--accent-pink);
        }

        /* 需求表单与联系我们 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
        }

        .form-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .submit-form {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .form-group-full {
            grid-column: span 2;
        }

        .form-label {
            display: block;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }

        .form-input {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s;
        }

        .form-input:focus {
            border-color: var(--primary);
        }

        .form-submit-btn {
            background: var(--primary-gradient);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s;
            grid-column: span 2;
            text-align: center;
        }

        .form-submit-btn:hover {
            opacity: 0.95;
            transform: translateY(-1px);
        }

        .contact-info-area {
            border-left: 1px solid var(--border-color);
            padding-left: 40px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .contact-info-item h4 {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .contact-info-item p {
            font-size: 13px;
            color: var(--text-muted);
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 10px;
        }

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

        .qr-item img {
            width: 100px;
            height: 100px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 4px;
            background: white;
        }

        .qr-item p {
            font-size: 11px;
            margin-top: 4px;
        }

        /* 页脚 */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 13px;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-about h3 {
            color: white;
            font-size: 16px;
            margin-bottom: 16px;
        }

        .footer-links h3 {
            color: white;
            font-size: 16px;
            margin-bottom: 16px;
        }

        .footer-links-list {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-links-list a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.2s;
        }

        .footer-links-list a:hover {
            color: white;
        }

        .footer-copyright {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .ai-page-home-link {
            color: #94a3b8;
            text-decoration: none;
        }

        .ai-page-home-link:hover {
            color: white;
        }

        /* 浮动工具栏 */
        .floating-toolbar {
            position: fixed;
            right: 20px;
            bottom: 40px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 999;
        }

        .toolbar-btn {
            width: 48px;
            height: 48px;
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s;
            position: relative;
        }

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

        .toolbar-btn svg {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }

        .qr-popup {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: white;
            border: 1px solid var(--border-color);
            padding: 12px;
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            display: none;
            text-align: center;
            width: 140px;
        }

        .qr-popup img {
            width: 110px;
            height: 110px;
        }

        .qr-popup p {
            font-size: 11px;
            color: var(--text-main);
            margin-top: 4px;
        }

        .toolbar-btn:hover .qr-popup {
            display: block;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .service-grid { grid-template-columns: repeat(2, 1fr); }
            .flow-grid { grid-template-columns: repeat(2, 1fr); }
            .solutions-grid { grid-template-columns: repeat(2, 1fr); }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
            .comments-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: repeat(3, 1fr); }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 16px;
                box-shadow: var(--shadow-md);
            }

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

            .menu-toggle {
                display: block;
            }

            .about-grid, .network-grid, .cases-grid, .help-grid, .contact-grid, .footer-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid, .service-grid, .flow-grid, .solutions-grid, .training-grid, .comments-grid, .news-grid {
                grid-template-columns: 1fr;
            }

            .contact-info-area {
                border-left: none;
                padding-left: 0;
                border-top: 1px solid var(--border-color);
                padding-top: 30px;
            }

            .submit-form {
                grid-template-columns: 1fr;
            }

            .form-group-full {
                grid-column: span 1;
            }

            .form-submit-btn {
                grid-column: span 1;
            }

            .hero-title {
                font-size: 32px;
            }

            .hero-subtitle {
                font-size: 16px;
            }
        }