/* 变量定义与基础重置 */
        :root {
            --primary: #0f172a;      /* 深靛蓝，保证大面积背景稳定 */
            --accent-orange: #ff5a00;/* 艳丽撞色橙 */
            --accent-green: #10b981; /* 活力撞色绿 */
            --accent-purple: #8b5cf6;/* 科技撞色紫 */
            --bg-light: #f8fafc;     /* 全局浅灰背景 */
            --text-dark: #0f172a;    /* 深色正文 */
            --text-muted: #475569;   /* 次要正文 */
            --border-color: #e2e8f0;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
            --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 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-dark);
            background-color: var(--bg-light);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        /* 全局通用布局容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            padding: 80px 0;
            position: relative;
        }

        /* 撞色艳色风标题样式 */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header .tag {
            display: inline-block;
            padding: 6px 16px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            border-left: 4px solid var(--accent-orange);
            transform: skewX(-10deg);
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            margin-top: 10px;
        }

        .section-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 10px auto 0;
            font-size: 16px;
        }

        /* 渐入动画基础 */
        .fade-in-section {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }

        .fade-in-section.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* 按钮与链接通用样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 700;
            border-radius: 4px;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--accent-orange);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255, 90, 0, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 90, 0, 0.4);
            background: #e04f00;
        }

        .btn-secondary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(15, 23, 42, 0.2);
        }

        .btn-secondary:hover {
            transform: translateY(-2px);
            background: #1e293b;
            box-shadow: 0 6px 20px rgba(15, 23, 42, 0.3);
        }

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

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

        /* 1. 顶部导航 */
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 2px solid var(--primary);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: var(--transition);
        }

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-dark);
            font-size: 14px;
            font-weight: 600;
            padding: 8px 12px;
            transition: var(--transition);
            border-bottom: 2px solid transparent;
        }

        .nav-links a:hover {
            color: var(--accent-orange);
            border-bottom: 2px solid var(--accent-orange);
        }

        .nav-links .ai-page-home-link {
            font-weight: 800;
            color: var(--accent-purple);
        }

        .nav-right-btn {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        /* 2. Hero首屏 - 严禁出现任何图片，主打几何、极简和撞色 */
        .hero {
            background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
            color: #fff;
            padding: 120px 0 140px;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 300px;
            height: 300px;
            background: var(--accent-orange);
            filter: blur(150px);
            opacity: 0.15;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -50px;
            left: -50px;
            width: 350px;
            height: 350px;
            background: var(--accent-green);
            filter: blur(180px);
            opacity: 0.15;
            pointer-events: none;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            background: rgba(255, 90, 0, 0.1);
            border: 1px solid var(--accent-orange);
            color: var(--accent-orange);
            font-weight: 700;
            font-size: 14px;
            border-radius: 50px;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .hero h1 {
            font-size: 40px;
            line-height: 1.25;
            font-weight: 900;
            margin-bottom: 24px;
            letter-spacing: -1px;
            color: #ffffff;
        }

        .hero h1 span {
            color: var(--accent-orange);
            background: linear-gradient(90deg, var(--accent-orange), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 18px;
            color: #cbd5e1;
            margin-bottom: 40px;
            line-height: 1.8;
        }

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

        .hero-btn-group .btn {
            min-width: 160px;
        }

        /* 3. 数据指标卡片 */
        .data-stats {
            margin-top: -60px;
            position: relative;
            z-index: 10;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: #fff;
            border: 2px solid var(--primary);
            box-shadow: 6px 6px 0px var(--primary);
            padding: 30px 20px;
            text-align: center;
            border-radius: 4px;
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translate(-3px, -3px);
            box-shadow: 9px 9px 0px var(--accent-orange);
        }

        .stat-num {
            font-size: 36px;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .stat-num span {
            color: var(--accent-orange);
        }

        .stat-label {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-muted);
        }

        /* 4. 关于我们 & 平台介绍 */
        .about-section {
            background: #fff;
            border-bottom: 1px solid var(--border-color);
        }

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

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

        .about-content p {
            color: var(--text-muted);
            font-size: 16px;
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .features-bullet {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 30px;
        }

        .bullet-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            color: var(--primary);
        }

        .bullet-item svg {
            color: var(--accent-green);
            flex-shrink: 0;
        }

        .about-visual {
            background: var(--primary);
            color: #fff;
            padding: 40px;
            border-radius: 4px;
            border: 3px solid var(--primary);
            box-shadow: 8px 8px 0px var(--accent-orange);
        }

        .visual-title {
            font-size: 20px;
            font-weight: 800;
            color: var(--accent-orange);
            margin-bottom: 15px;
            border-bottom: 2px solid rgba(255,255,255,0.1);
            padding-bottom: 10px;
        }

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

        .visual-list li {
            padding: 8px 0;
            font-size: 14px;
            border-bottom: 1px dashed rgba(255,255,255,0.1);
            display: flex;
            justify-content: space-between;
        }

        .visual-list li span {
            color: var(--accent-green);
            font-weight: 700;
        }

        /* 5. 全平台AIGC服务 & 聚合模型列表 */
        .services-section {
            background: var(--bg-light);
        }

        .model-tags-container {
            margin-top: 30px;
            background: #fff;
            padding: 24px;
            border: 2px solid var(--primary);
            border-radius: 4px;
        }

        .model-tags-title {
            font-size: 16px;
            font-weight: 800;
            margin-bottom: 15px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .tags-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .model-tag {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            color: var(--text-dark);
            padding: 6px 14px;
            border-radius: 4px;
            font-size: 13px;
            font-weight: 600;
            transition: var(--transition);
        }

        .model-tag:hover {
            border-color: var(--accent-orange);
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* 6. 一站式AIGC制作 - 核心能力卡片 */
        .creation-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 20px;
        }

        .creation-card {
            background: #fff;
            border: 2px solid var(--primary);
            border-radius: 4px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
        }

        .creation-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--accent-purple);
            transition: var(--transition);
        }

        .creation-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .creation-card:hover::after {
            background: var(--accent-orange);
        }

        .card-icon {
            width: 48px;
            height: 48px;
            background: var(--bg-light);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 4px;
            margin-bottom: 20px;
            color: var(--accent-orange);
        }

        .creation-card h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 12px;
        }

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

        /* 7. 全行业解决方案 */
        .solutions-section {
            background: #fff;
        }

        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .solution-box {
            border: 2px solid var(--primary);
            border-radius: 4px;
            padding: 24px;
            background: #fff;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .solution-box:hover {
            background: var(--primary);
            color: #fff;
        }

        .solution-box:hover p {
            color: #cbd5e1;
        }

        .solution-box h4 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .solution-box p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 15px;
            flex-grow: 1;
        }

        .solution-link {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-orange);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* 8. 全行业服务网络 */
        .network-section {
            background: var(--bg-light);
        }

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

        .network-info h3 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .network-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .network-node {
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 12px 16px;
            border-radius: 4px;
            font-size: 14px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .network-node::before {
            content: '';
            display: block;
            width: 8px;
            height: 8px;
            background: var(--accent-green);
            border-radius: 50%;
        }

        .network-map-sim {
            background: var(--primary);
            height: 250px;
            border-radius: 4px;
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .network-map-sim::before {
            content: '';
            position: absolute;
            width: 80%;
            height: 80%;
            border: 1px dashed rgba(255,255,255,0.15);
            border-radius: 50%;
            animation: pulse-ring 4s infinite linear;
        }

        @keyframes pulse-ring {
            0% { transform: scale(0.8); opacity: 0.8; }
            100% { transform: scale(1.2); opacity: 0; }
        }

        .map-center {
            position: relative;
            z-index: 2;
            background: var(--accent-orange);
            color: #fff;
            padding: 8px 16px;
            font-size: 12px;
            font-weight: 800;
            border-radius: 50px;
            box-shadow: 0 0 20px var(--accent-orange);
        }

        /* 9. 标准化AIGC流程 */
        .process-section {
            background: #fff;
        }

        .process-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }

        .process-step {
            background: var(--bg-light);
            border: 2px solid var(--primary);
            border-radius: 4px;
            padding: 24px;
            position: relative;
        }

        .step-num {
            position: absolute;
            top: -15px;
            left: 20px;
            background: var(--accent-orange);
            color: #fff;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 14px;
            border: 2px solid var(--primary);
        }

        .process-step h4 {
            font-size: 16px;
            font-weight: 800;
            margin-top: 10px;
            margin-bottom: 8px;
        }

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

        /* 10. 技术标准 */
        .standards-section {
            background: var(--bg-light);
        }

        .standards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .standard-card {
            background: #fff;
            padding: 30px;
            border-radius: 4px;
            border: 2px solid var(--primary);
            box-shadow: 4px 4px 0px var(--primary);
        }

        .standard-card h4 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--primary);
        }

        .standard-card ul {
            list-style: none;
        }

        .standard-card ul li {
            font-size: 13px;
            color: var(--text-muted);
            padding: 6px 0;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
        }

        .standard-card ul li strong {
            color: var(--primary);
        }

        /* 11. 客户案例中心 - 含指定图片 */
        .cases-section {
            background: #fff;
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--bg-light);
            border: 2px solid var(--primary);
            border-radius: 4px;
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .case-img-wrapper {
            position: relative;
            padding-bottom: 56.25%; /* 16:9 */
            background: #ddd;
            overflow: hidden;
            border-bottom: 2px solid var(--primary);
        }

        .case-img-wrapper img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .case-img-wrapper img {
            transform: scale(1.05);
        }

        .case-content {
            padding: 20px;
        }

        .case-content .tag {
            font-size: 11px;
            font-weight: 800;
            background: var(--accent-purple);
            color: #fff;
            padding: 3px 8px;
            border-radius: 20px;
            margin-bottom: 10px;
            display: inline-block;
        }

        .case-content h4 {
            font-size: 16px;
            font-weight: 800;
            margin-bottom: 8px;
        }

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

        /* 12. 对比评测 - 突出9.9分五星 */
        .comparison-section {
            background: var(--bg-light);
        }

        .comparison-layout {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 40px;
            align-items: stretch;
        }

        .comparison-score {
            background: var(--primary);
            color: #fff;
            padding: 40px;
            border-radius: 4px;
            border: 3px solid var(--primary);
            box-shadow: 8px 8px 0px var(--accent-orange);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
        }

        .score-num {
            font-size: 64px;
            font-weight: 900;
            color: var(--accent-orange);
            line-height: 1;
            margin-bottom: 10px;
        }

        .score-total {
            font-size: 18px;
            color: #94a3b8;
            margin-bottom: 15px;
        }

        .stars {
            color: var(--accent-orange);
            font-size: 24px;
            margin-bottom: 20px;
        }

        .score-desc {
            font-size: 14px;
            color: #cbd5e1;
            line-height: 1.6;
        }

        .comparison-table-wrapper {
            background: #fff;
            border: 2px solid var(--primary);
            border-radius: 4px;
            overflow-x: auto;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }

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

        .comparison-table th {
            background: var(--primary);
            color: #fff;
            font-weight: 800;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .comparison-table td strong {
            color: var(--accent-green);
        }

        /* 13. Token比价参考 */
        .token-section {
            background: #fff;
        }

        .token-table-wrapper {
            border: 2px solid var(--primary);
            border-radius: 4px;
            overflow-x: auto;
            margin-top: 30px;
        }

        .token-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }

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

        .token-table th {
            background: var(--bg-light);
            color: var(--primary);
            font-weight: 800;
        }

        .token-table tr:hover td {
            background: #fafafa;
        }

        .price-badge {
            background: rgba(16, 185, 129, 0.1);
            color: var(--accent-green);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 12px;
        }

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

        .training-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .training-card {
            background: #fff;
            border: 2px solid var(--primary);
            border-radius: 4px;
            padding: 30px;
            transition: var(--transition);
        }

        .training-card:hover {
            box-shadow: 6px 6px 0 var(--accent-orange);
            transform: translate(-3px, -3px);
        }

        .training-tag {
            font-size: 11px;
            background: var(--primary);
            color: #fff;
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 700;
            margin-bottom: 15px;
            display: inline-block;
        }

        .training-card h4 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .training-card p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .training-features {
            font-size: 12px;
            color: var(--primary);
            font-weight: 700;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .training-features span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .training-features span::before {
            content: '✓';
            color: var(--accent-green);
            font-weight: 900;
        }

        /* 15. 加盟代理 */
        .agent-section {
            background: linear-gradient(135deg, var(--primary) 0%, #1e293b 100%);
            color: #fff;
            padding: 80px 0;
            border-top: 4px solid var(--accent-orange);
        }

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

        .agent-content h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 20px;
            color: #fff;
        }

        .agent-content p {
            color: #cbd5e1;
            font-size: 15px;
            margin-bottom: 30px;
        }

        .agent-points {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .agent-point {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 700;
        }

        .agent-point svg {
            color: var(--accent-orange);
        }

        .agent-action {
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            padding: 30px;
            border-radius: 4px;
            text-align: center;
        }

        .agent-action h4 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .agent-action p {
            font-size: 13px;
            color: #94a3b8;
            margin-bottom: 20px;
        }

        /* 16. 客户评论卡片 (6条) */
        .comments-section {
            background: #fff;
        }

        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .comment-card {
            background: var(--bg-light);
            border: 2px solid var(--primary);
            border-radius: 4px;
            padding: 30px;
            position: relative;
        }

        .quote-icon {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 48px;
            line-height: 1;
            color: var(--border-color);
            font-family: Georgia, serif;
            user-select: none;
        }

        .comment-text {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
            line-height: 1.6;
        }

        .commenter-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .commenter-meta h5 {
            font-size: 14px;
            font-weight: 800;
            color: var(--primary);
        }

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

        /* 17. 常见用户问题 FAQ */
        .faq-section {
            background: var(--bg-light);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .faq-item {
            background: #fff;
            border: 2px solid var(--primary);
            border-radius: 4px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 20px;
            font-size: 15px;
            font-weight: 800;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #fff;
            user-select: none;
        }

        .faq-question::after {
            content: '+';
            font-size: 20px;
            font-weight: 800;
            transition: transform 0.3s;
        }

        .faq-item.active .faq-question::after {
            content: '-';
        }

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

        .faq-answer-inner {
            padding: 20px;
            font-size: 14px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            line-height: 1.6;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
        }

        /* 18. AI术语百科 & 常见问题自助排查 */
        .kb-section {
            background: #fff;
        }

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

        .kb-column h3 {
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 20px;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 10px;
        }

        .kb-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .kb-item {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 16px;
        }

        .kb-item h4 {
            font-size: 15px;
            font-weight: 800;
            margin-bottom: 6px;
            color: var(--primary);
        }

        .kb-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 19. 行业资讯 / 知识库 (文章列表) */
        .news-section {
            background: var(--bg-light);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .news-card {
            background: #fff;
            border: 2px solid var(--primary);
            border-radius: 4px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-body {
            padding: 24px;
        }

        .news-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: block;
        }

        .news-body h4 {
            font-size: 16px;
            font-weight: 800;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .news-body h4 a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        .news-body h4 a:hover {
            color: var(--accent-orange);
        }

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

        .news-footer {
            padding: 16px 24px;
            border-top: 1px solid var(--border-color);
            background: #fafafa;
        }

        .news-link {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-purple);
            text-decoration: none;
        }

        /* 20. 智能需求匹配 (表单区) */
        .form-section {
            background: #fff;
        }

        .form-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .form-info h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .form-info p {
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .form-info-items {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-top: 30px;
        }

        .form-info-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            font-weight: 700;
        }

        .form-info-item svg {
            color: var(--accent-orange);
        }

        .form-wrapper {
            background: var(--bg-light);
            border: 2px solid var(--primary);
            padding: 30px;
            border-radius: 4px;
            box-shadow: 6px 6px 0px var(--primary);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--primary);
            border-radius: 4px;
            font-size: 14px;
            background: #fff;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--accent-orange);
            box-shadow: 0 0 0 3px rgba(255, 90, 0, 0.1);
        }

        textarea.form-control {
            height: 100px;
            resize: vertical;
        }

        /* 21. 联系我们 (信息汇总 & 二维码) */
        .contact-section {
            background: var(--bg-light);
            border-bottom: 2px solid var(--primary);
        }

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

        .contact-card {
            background: #fff;
            border: 2px solid var(--primary);
            border-radius: 4px;
            padding: 24px;
            text-align: center;
        }

        .contact-card .icon {
            width: 48px;
            height: 48px;
            background: var(--bg-light);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            margin: 0 auto 15px;
            color: var(--accent-orange);
        }

        .contact-card h4 {
            font-size: 16px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .contact-card p {
            font-size: 13px;
            color: var(--text-muted);
            word-break: break-all;
        }

        .qr-wrapper {
            margin-top: 15px;
        }

        .qr-wrapper img {
            width: 120px;
            height: 120px;
            border: 1px solid var(--border-color);
            padding: 5px;
            background: #fff;
        }

        /* 页脚 & 友情链接 */
        footer {
            background: var(--primary);
            color: #fff;
            padding: 60px 0 20px;
        }

        .footer-layout {
            display: grid;
            grid-template-columns: 1fr 1.5fr;
            gap: 50px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            padding-bottom: 40px;
            margin-bottom: 30px;
        }

        .footer-brand h4 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 15px;
            color: #fff;
        }

        .footer-brand p {
            font-size: 13px;
            color: #94a3b8;
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .footer-links-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .footer-link-group h5 {
            font-size: 14px;
            font-weight: 800;
            color: var(--accent-orange);
            margin-bottom: 15px;
            text-transform: uppercase;
        }

        .footer-link-group ul {
            list-style: none;
        }

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

        .footer-link-group ul li a {
            color: #cbd5e1;
            text-decoration: none;
            font-size: 13px;
            transition: var(--transition);
        }

        .footer-link-group ul li a:hover {
            color: #fff;
            padding-left: 5px;
        }

        /* 友情链接区 */
        .friend-links-area {
            background: rgba(0, 0, 0, 0.2);
            padding: 20px;
            border-radius: 4px;
            margin-bottom: 30px;
        }

        .friend-links-title {
            font-size: 13px;
            font-weight: 800;
            color: #94a3b8;
            margin-bottom: 10px;
        }

        .friend-links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
        }

        .friend-links-list a {
            color: #cbd5e1;
            text-decoration: none;
            font-size: 13px;
            transition: var(--transition);
        }

        .friend-links-list a:hover {
            color: var(--accent-green);
        }

        /* 版权与首页链接 */
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #94a3b8;
            flex-wrap: wrap;
            gap: 15px;
        }

        .footer-bottom-links {
            display: flex;
            gap: 15px;
        }

        .footer-bottom-links a {
            color: #94a3b8;
            text-decoration: none;
        }

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

        /* 浮动客服 */
        .float-contact {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 99;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid #fff;
            position: relative;
        }

        .float-btn:hover {
            background: var(--accent-orange);
            transform: translateY(-3px);
        }

        .float-btn-qr {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #fff;
            border: 2px solid var(--primary);
            padding: 10px;
            border-radius: 4px;
            box-shadow: var(--shadow-lg);
            display: none;
            width: 150px;
            text-align: center;
        }

        .float-btn-qr img {
            width: 100%;
            height: auto;
        }

        .float-btn-qr p {
            color: var(--primary);
            font-size: 11px;
            font-weight: 800;
            margin-top: 5px;
        }

        .float-btn:hover .float-btn-qr {
            display: block;
        }

        .back-to-top {
            opacity: 0;
            visibility: hidden;
        }

        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .stats-grid, .creation-cards, .solutions-grid, .news-grid, .comments-grid, .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-layout, .about-layout, .network-layout, .form-layout {
                grid-template-columns: 1fr;
            }
            .process-timeline {
                grid-template-columns: repeat(2, 1fr);
            }
            .contact-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 2px solid var(--primary);
                box-shadow: var(--shadow-md);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .hero h1 {
                font-size: 32px;
            }
            .stats-grid, .creation-cards, .solutions-grid, .news-grid, .comments-grid, .training-grid, .process-timeline, .contact-grid {
                grid-template-columns: 1fr;
            }
            .footer-layout {
                grid-template-columns: 1fr;
            }
            .footer-links-grid {
                grid-template-columns: 1fr;
            }
        }