/* 艳色潮流风：亮色底、高对比度、潮流色点缀（高饱和度粉蓝紫渐变） */
        :root {
            --primary: #ff007f; /* 潮流洋红 */
            --secondary: #00f0ff; /* 霓虹天蓝 */
            --accent: #7000ff; /* 潮流极光紫 */
            --dark: #0f172a; /* 深灰黑 */
            --light-bg: #f8fafc; /* 米灰白 */
            --card-bg: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
        }

        * {
            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;
            background-color: var(--light-bg);
            color: var(--text-main);
        }

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

        /* 全局通用布局容器 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            padding: 96px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-header .tag {
            display: inline-block;
            padding: 6px 16px;
            background: linear-gradient(135deg, rgba(255,0,127,0.1), rgba(0,240,255,0.1));
            color: var(--primary);
            border-radius: 30px;
            font-size: 14px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 16px;
            border: 1px solid rgba(255,0,127,0.2);
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

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

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            font-size: 16px;
            font-weight: 700;
            border-radius: 12px;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            outline: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            box-shadow: 0 8px 24px rgba(255, 0, 127, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(255, 0, 127, 0.45);
        }

        .btn-secondary {
            background: #ffffff;
            color: var(--dark);
            border: 2px solid var(--dark);
        }

        .btn-secondary:hover {
            background: var(--dark);
            color: #ffffff;
            transform: translateY(-3px);
        }

        /* 导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 80px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.06);
            display: flex;
            align-items: center;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }

        .brand .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .brand span {
            font-size: 20px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
        }

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

        .nav-menu a {
            text-decoration: none;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
        }

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

        .nav-btn {
            background: var(--dark);
            color: #ffffff;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 700;
            text-decoration: none;
            transition: var(--transition);
        }

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

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* 1. Hero 首屏 - 纯色/渐变/几何块/无图片 */
        .hero {
            padding-top: 160px;
            padding-bottom: 120px;
            background: radial-gradient(circle at 80% 20%, rgba(0, 240, 255, 0.15), transparent 45%),
                        radial-gradient(circle at 10% 80%, rgba(255, 0, 127, 0.12), transparent 40%),
                        #ffffff;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: linear-gradient(rgba(0, 0, 0, 0.03) 1px, transparent 1px),
                              linear-gradient(90deg, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 48px;
            line-height: 1.2;
            font-weight: 900;
            color: var(--dark);
            margin-bottom: 24px;
        }

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

        .hero-content p {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.8;
            max-width: 600px;
        }

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

        /* 首屏右侧：拟态AIGC看板 */
        .hero-visual {
            background: linear-gradient(135deg, #1e1b4b, #0f172a);
            border-radius: 24px;
            padding: 32px;
            box-shadow: 0 20px 40px rgba(15, 23, 42, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: #ffffff;
            position: relative;
        }

        .dashboard-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 16px;
            margin-bottom: 20px;
        }

        .dot-group {
            display: flex;
            gap: 6px;
        }

        .dot-group span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #ef4444;
        }

        .dot-group span:nth-child(2) { background: #eab308; }
        .dot-group span:nth-child(3) { background: #22c55e; }

        .dashboard-tag {
            font-size: 12px;
            background: rgba(0, 240, 255, 0.2);
            color: var(--secondary);
            padding: 4px 8px;
            border-radius: 4px;
            font-weight: 700;
        }

        .dashboard-content {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .chat-bubble {
            background: rgba(255, 255, 255, 0.05);
            padding: 14px;
            border-radius: 12px;
            border-left: 4px solid var(--primary);
            font-size: 13px;
        }

        .chat-bubble.right {
            border-left: none;
            border-right: 4px solid var(--secondary);
            background: rgba(0, 240, 255, 0.05);
            align-self: flex-end;
            width: 90%;
        }

        .stat-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 8px;
        }

        .stat-item {
            background: rgba(255,255,255,0.03);
            border: 1px solid rgba(255,255,255,0.05);
            padding: 12px;
            border-radius: 8px;
            text-align: center;
        }

        .stat-item .num {
            font-size: 20px;
            font-weight: 800;
            color: var(--secondary);
        }

        .stat-item .label {
            font-size: 11px;
            color: rgba(255,255,255,0.6);
        }

        /* 2. 关于我们 */
        .about {
            background-color: #ffffff;
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 60px;
            align-items: center;
        }

        .about-info h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .about-info p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 16px;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .about-card {
            padding: 24px;
            border-radius: 16px;
            background: var(--light-bg);
            border: 1px solid rgba(0,0,0,0.04);
            transition: var(--transition);
        }

        .about-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 24px rgba(0,0,0,0.05);
        }

        .about-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .about-card p {
            font-size: 14px;
            margin-bottom: 0;
        }

        /* 3. 全平台AIGC服务体系 & 18. 术语百科 (模型标签云) */
        .services {
            background-color: var(--light-bg);
        }

        .platform-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 900px;
            margin: 40px auto 0 auto;
        }

        .platform-tag {
            padding: 10px 20px;
            border-radius: 30px;
            background: #ffffff;
            border: 1px solid rgba(0,0,0,0.06);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .platform-tag:hover {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            transform: scale(1.05);
            box-shadow: 0 6px 15px rgba(255, 0, 127, 0.2);
        }

        /* 4. 全自动AIGC制作流程 & 7. 标准化服务全流程 (时间轴) */
        .workflow {
            background-color: #ffffff;
        }

        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary), var(--secondary));
            transform: translateX(-50%);
            border-radius: 2px;
        }

        .timeline-item {
            padding: 30px;
            position: relative;
            width: 50%;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
            padding-right: 50px;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            padding-left: 50px;
        }

        .timeline-dot {
            position: absolute;
            top: 38px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #ffffff;
            border: 4px solid var(--primary);
            z-index: 10;
        }

        .timeline-item:nth-child(odd) .timeline-dot {
            right: -10px;
        }

        .timeline-item:nth-child(even) .timeline-dot {
            left: -10px;
            border-color: var(--secondary);
        }

        .timeline-content {
            background: var(--light-bg);
            padding: 24px;
            border-radius: 16px;
            border: 1px solid rgba(0,0,0,0.05);
            display: inline-block;
            text-align: left;
            transition: var(--transition);
        }

        .timeline-content:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }

        .timeline-content h3 {
            font-size: 18px;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .timeline-content p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 5. 全行业解决方案 */
        .solutions {
            background-color: var(--light-bg);
        }

        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .solution-card {
            background: #ffffff;
            padding: 32px;
            border-radius: 20px;
            border: 1px solid rgba(0,0,0,0.04);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .solution-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.06);
            border-color: rgba(255, 0, 127, 0.2);
        }

        .solution-card .icon-box {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(255,0,127,0.1), rgba(0,240,255,0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 24px;
        }

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

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

        /* 6. 全国服务网络 */
        .network {
            background-color: #ffffff;
        }

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .network-map-css {
            position: relative;
            height: 350px;
            background: radial-gradient(circle, rgba(0,240,255,0.05) 0%, transparent 70%);
            border-radius: 24px;
            border: 1px dashed rgba(0,0,0,0.1);
        }

        .map-node {
            position: absolute;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .map-node .ping {
            width: 12px;
            height: 12px;
            background-color: var(--primary);
            border-radius: 50%;
            position: relative;
        }

        .map-node .ping::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 100%;
            background-color: var(--primary);
            border-radius: 50%;
            animation: pulse 1.8s infinite ease-in-out;
        }

        .map-node span {
            margin-top: 6px;
            font-size: 12px;
            font-weight: 700;
            color: var(--dark);
            background: #ffffff;
            padding: 2px 6px;
            border-radius: 4px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }

        #node-xa { top: 40%; left: 45%; } /* 西安总部 */
        #node-bj { top: 25%; left: 60%; } /* 北京 */
        #node-sh { top: 50%; left: 75%; } /* 上海 */
        #node-sz { top: 75%; left: 65%; } /* 深圳 */

        @keyframes pulse {
            0% { transform: scale(1); opacity: 1; }
            100% { transform: scale(3); opacity: 0; }
        }

        .network-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .network-item {
            background: var(--light-bg);
            padding: 20px;
            border-radius: 12px;
            border-left: 4px solid var(--secondary);
        }

        /* 8. 技术标准 */
        .standards {
            background-color: var(--light-bg);
        }

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

        .standard-card {
            background: #ffffff;
            padding: 30px;
            border-radius: 16px;
            text-align: center;
            border: 1px solid rgba(0,0,0,0.04);
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
        }

        .standard-card .value {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .standard-card .label {
            font-size: 15px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 6px;
        }

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

        /* 9. 客户案例中心 (包含宣传图，左右分布) */
        .cases {
            background-color: #ffffff;
        }

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

        .case-card {
            background: var(--light-bg);
            border-radius: 24px;
            overflow: hidden;
            border: 1px solid rgba(0,0,0,0.04);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 36px rgba(0,0,0,0.06);
        }

        .case-img-wrapper {
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #eaeaea;
        }

        .case-img-wrapper img {
            width: 100%;
            height: auto;
            object-fit: cover;
            display: block;
        }

        .case-info {
            padding: 24px;
        }

        .case-info h3 {
            font-size: 20px;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .case-info p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 10. 对比评测 */
        .evaluations {
            background-color: var(--light-bg);
        }

        .rating-box {
            background: #ffffff;
            border-radius: 24px;
            padding: 32px;
            margin-bottom: 40px;
            text-align: center;
            border: 1px solid rgba(0,0,0,0.05);
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            display: flex;
            justify-content: space-around;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .rating-item h3 {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .rating-item .score-large {
            font-size: 48px;
            font-weight: 900;
            color: var(--primary);
        }

        .rating-item .stars {
            color: #f59e0b;
            font-size: 32px;
        }

        .rating-table-wrapper {
            overflow-x: auto;
        }

        .rating-table {
            width: 100%;
            border-collapse: collapse;
            background: #ffffff;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
        }

        .rating-table th, .rating-table td {
            padding: 18px 24px;
            text-align: left;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .rating-table th {
            background-color: var(--dark);
            color: #ffffff;
            font-weight: 700;
        }

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

        /* 12. Token比价参考 */
        .token-pricing {
            background-color: #ffffff;
        }

        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .pricing-card {
            background: var(--light-bg);
            border-radius: 16px;
            padding: 24px;
            border: 1px solid rgba(0,0,0,0.04);
            text-align: center;
            transition: var(--transition);
        }

        .pricing-card:hover {
            transform: translateY(-5px);
            border-color: var(--secondary);
            box-shadow: 0 10px 20px rgba(0,0,0,0.04);
        }

        .pricing-card h3 {
            font-size: 18px;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .pricing-card .price {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .pricing-card .unit {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .pricing-card .save-tag {
            display: inline-block;
            background: rgba(0,240,255,0.1);
            color: #008fa0;
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 700;
        }

        /* 13 & 14. 职业技术与人工智能培训 */
        .training {
            background-color: var(--light-bg);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .training-card {
            background: #ffffff;
            border-radius: 20px;
            padding: 30px;
            border: 1px solid rgba(0,0,0,0.04);
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.05);
        }

        .training-card h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .training-card .meta {
            font-size: 12px;
            background: #f1f5f9;
            color: var(--text-muted);
            padding: 4px 8px;
            border-radius: 4px;
            display: inline-block;
            margin-bottom: 16px;
        }

        .training-card ul {
            list-style: none;
            padding-left: 0;
            margin-bottom: 20px;
        }

        .training-card ul li {
            font-size: 14px;
            margin-bottom: 8px;
            position: relative;
            padding-left: 20px;
            color: var(--text-main);
        }

        .training-card ul li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 700;
        }

        /* 15 & 17. 帮助中心与自助排查 */
        .help-center {
            background-color: #ffffff;
        }

        .help-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .help-step-box {
            background: var(--light-bg);
            border-radius: 20px;
            padding: 30px;
        }

        .step-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .step-item {
            display: flex;
            gap: 16px;
            background: #ffffff;
            padding: 20px;
            border-radius: 12px;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .step-num {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--dark);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            flex-shrink: 0;
        }

        .step-info h4 {
            font-size: 16px;
            margin-bottom: 6px;
            color: var(--dark);
        }

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

        /* 16. FAQ 折叠面板 (手风琴) */
        .faq {
            background-color: var(--light-bg);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #ffffff;
            border-radius: 12px;
            border: 1px solid rgba(0,0,0,0.04);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            background: none;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            outline: none;
        }

        .faq-question::after {
            content: "+";
            font-size: 20px;
            font-weight: 400;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: #fafafa;
        }

        .faq-answer-content {
            padding: 20px 24px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid #f1f5f9;
        }

        /* 6条用户评论 */
        .testimonials {
            background-color: #ffffff;
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .testimonial-card {
            background: var(--light-bg);
            border-radius: 20px;
            padding: 28px;
            border: 1px solid rgba(0,0,0,0.03);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .testimonial-text {
            font-size: 14px;
            color: var(--text-main);
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--dark);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 14px;
        }

        .testimonial-info h4 {
            font-size: 14px;
            color: var(--dark);
            font-weight: 700;
        }

        .testimonial-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 19. 行业资讯 / 知识库 (最新文章) */
        .news {
            background-color: var(--light-bg);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .news-card {
            background: #ffffff;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid rgba(0,0,0,0.04);
            display: flex;
            flex-direction: column;
        }

        .news-card .info {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .news-card .date {
            font-size: 12px;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 8px;
        }

        .news-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .news-card h3 a {
            color: var(--dark);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .news-card p {
            font-size: 13px;
            color: var(--text-muted);
            flex-grow: 1;
            margin-bottom: 16px;
        }

        /* 11 & 20. 智能需求匹配与联系我们 */
        .contact {
            background-color: #ffffff;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 48px;
        }

        .contact-info-panel {
            background: var(--light-bg);
            border-radius: 24px;
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-details {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .detail-item {
            display: flex;
            gap: 16px;
            align-items: center;
        }

        .detail-item .icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
            font-weight: 800;
        }

        .detail-text h4 {
            font-size: 13px;
            color: var(--text-muted);
        }

        .detail-text p {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
        }

        .qr-codes {
            display: flex;
            gap: 24px;
            margin-top: 30px;
            background: #ffffff;
            padding: 20px;
            border-radius: 16px;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .qr-item {
            text-align: center;
            width: 100px;
        }

        .qr-item img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin-bottom: 6px;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .qr-item span {
            font-size: 11px;
            color: var(--text-muted);
            display: block;
        }

        .contact-form-panel {
            background: #ffffff;
            border-radius: 24px;
            padding: 40px;
            border: 1px solid rgba(0,0,0,0.04);
            box-shadow: 0 15px 40px rgba(0,0,0,0.04);
        }

        .form-group-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 16px;
        }

        .form-group {
            margin-bottom: 16px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group label {
            font-size: 14px;
            font-weight: 700;
            color: var(--dark);
        }

        .form-group input, .form-group select, .form-group textarea {
            padding: 12px 16px;
            border-radius: 8px;
            border: 1px solid rgba(0,0,0,0.15);
            font-size: 14px;
            color: var(--text-main);
            outline: none;
            transition: var(--transition);
        }

        .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255,0,127,0.1);
        }

        /* 友情链接与页脚 */
        footer {
            background-color: var(--dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.5fr;
            gap: 48px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 40px;
            margin-bottom: 30px;
        }

        .footer-brand .footer-logo-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .footer-brand .ai-page-logo {
            height: 36px;
        }

        .footer-brand span {
            color: #ffffff;
            font-size: 18px;
            font-weight: 800;
        }

        .footer-links h3 {
            color: #ffffff;
            font-size: 16px;
            margin-bottom: 16px;
            font-weight: 700;
        }

        .footer-links ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .footer-links.friendship-links {
            display: flex;
            flex-direction: column;
        }

        .friendship-links-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 16px;
        }

        .friendship-links-container a {
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            font-size: 13px;
        }

        .friendship-links-container a:hover {
            color: var(--secondary);
        }

        .copyright-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 12px;
        }

        .copyright-bar a {
            color: rgba(255,255,255,0.5);
            text-decoration: none;
        }

        /* 浮动工具栏 */
        .float-toolbar {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-item {
            width: 48px;
            height: 48px;
            background: #ffffff;
            border-radius: 50%;
            box-shadow: 0 8px 24px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            color: var(--dark);
            border: 1px solid rgba(0,0,0,0.05);
            position: relative;
        }

        .float-item:hover {
            background: var(--primary);
            color: #ffffff;
            transform: translateY(-3px);
        }

        .float-item .popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #ffffff;
            padding: 16px;
            border-radius: 12px;
            box-shadow: 0 8px 24px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 140px;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .float-item .popover img {
            width: 100px;
            height: 100px;
            margin-bottom: 8px;
        }

        .float-item .popover span {
            font-size: 12px;
            color: var(--dark);
            font-weight: 700;
        }

        .float-item:hover .popover {
            display: block;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .about-grid, .network-grid, .help-grid, .contact-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .standards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            header {
                height: 70px;
            }
            .nav-menu {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 24px;
                gap: 16px;
                border-bottom: 1px solid rgba(0,0,0,0.06);
                transform: translateY(-150%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
            }
            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .menu-toggle {
                display: flex;
            }
            .hero-content h1 {
                font-size: 32px;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                text-align: left !important;
                padding-left: 50px !important;
                padding-right: 0 !important;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .timeline-dot {
                left: 10px !important;
                right: auto !important;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .form-group-row {
                grid-template-columns: 1fr;
            }
        }