:root {
            --primary: #2563eb;
            --primary-light: #eff6ff;
            --secondary: #8b5cf6;
            --accent: #06b6d4;
            --text-main: #1e293b;
            --text-dark: #0f172a;
            --text-muted: #64748b;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --success: #10b981;
            --glow: 0 0 20px rgba(37, 99, 235, 0.15);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 顶部导航 */
        header {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
        }

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-links {
            display: flex;
            gap: 15px;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-main);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s;
        }

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

        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            box-shadow: var(--glow);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: transparent;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background: var(--text-dark);
            border-radius: 3px;
            transition: 0.3s;
        }

        /* Hero 首屏 - 无图片，科技渐变几何风格 */
        .hero {
            padding: 160px 0 100px;
            background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.1), transparent),
                        radial-gradient(circle at 10% 80%, rgba(139, 92, 246, 0.1), transparent),
                        var(--bg-white);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
        }

        .hero-content {
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 10;
        }

        .badge-premium {
            display: inline-flex;
            align-items: center;
            background: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(37, 99, 235, 0.15);
        }

        h1.hero-title {
            font-size: 42px;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

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

        .hero-sub {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 35px;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        .btn-main {
            padding: 14px 30px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
        }

        .btn-main.primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
        }

        .btn-main.primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 25px rgba(37, 99, 235, 0.45);
        }

        .btn-main.secondary {
            background: var(--bg-light);
            color: var(--text-dark);
            border: 1px solid var(--border-color);
        }

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

        /* 数据指标卡片 */
        .stats-section {
            padding: 40px 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
        }

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

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

        .stat-card:hover {
            transform: translateY(-3px);
        }

        .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

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

        /* 通用区块样式 */
        .section-padding {
            padding: 80px 0;
        }

        .bg-light-section {
            background-color: var(--bg-light);
        }

        .bg-white-section {
            background-color: var(--bg-white);
        }

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

        .section-tag {
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 10px;
            display: inline-block;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 15px;
        }

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

        /* 关于我们与软件介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 24px;
            color: var(--text-dark);
            margin-bottom: 15px;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 15px;
        }

        .about-features {
            list-style: none;
        }

        .about-features li {
            position: relative;
            padding-left: 25px;
            margin-bottom: 12px;
            font-size: 15px;
            color: var(--text-dark);
            font-weight: 500;
        }

        .about-features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--success);
            font-weight: bold;
        }

        .about-visual {
            background: linear-gradient(135deg, var(--primary-light), rgba(139, 92, 246, 0.1));
            border-radius: 20px;
            padding: 40px;
            border: 1px dashed rgba(37, 99, 235, 0.3);
            text-align: center;
        }

        .platform-box {
            display: inline-block;
            background: #fff;
            padding: 15px 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            font-weight: bold;
            color: var(--primary);
        }

        /* AIGC 服务标签云与支持模型 */
        .platform-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .platform-tag {
            background: var(--bg-white);
            color: var(--text-dark);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            border: 1px solid var(--border-color);
            transition: all 0.2s;
            box-shadow: 0 2px 4px rgba(0,0,0,0.02);
        }

        .platform-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
        }

        /* 一站式AIGC制作与能力卡片 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: 16px;
            padding: 30px;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity 0.3s;
        }

        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

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

        .feature-icon {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .feature-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
        }

        .feature-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        .feature-tag {
            display: inline-block;
            font-size: 12px;
            background: #f1f5f9;
            padding: 3px 8px;
            border-radius: 4px;
            color: var(--text-muted);
            margin-right: 5px;
            margin-bottom: 5px;
        }

        /* 全行业解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

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

        .solution-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
        }

        .solution-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

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

        /* 全国服务网络 */
        .network-section {
            background: radial-gradient(circle at center, rgba(37,99,235,0.05), transparent), var(--bg-white);
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .network-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 15px;
        }

        .network-item {
            background: var(--bg-light);
            padding: 15px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .network-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent);
            box-shadow: 0 0 8px var(--accent);
        }

        /* 流程步骤 / 时间线 */
        .workflow-timeline {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .workflow-timeline::before {
            content: '';
            position: absolute;
            top: 35px;
            left: 50px;
            right: 50px;
            height: 2px;
            background: var(--border-color);
            z-index: 1;
        }

        .timeline-step {
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-number {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--bg-white);
            border: 3px solid var(--primary);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            margin: 0 auto 15px;
            box-shadow: 0 0 10px rgba(0,0,0,0.05);
        }

        .timeline-step:hover .step-number {
            background: var(--primary);
            color: #fff;
            transform: scale(1.1);
            transition: all 0.3s;
        }

        .step-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

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

        /* 技术标准 */
        .standards-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .standard-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
        }

        .standard-card h4 {
            font-size: 16px;
            color: var(--text-dark);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        /* 案例展示区 - 包含横版与方版素材 */
        .cases-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 25px;
        }

        .case-left {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

        .case-media-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .case-media-item {
            background: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            border: 1px solid var(--border-color);
        }

        .case-image-wrap {
            width: 100%;
            height: 180px;
            overflow: hidden;
            background: #eee;
        }

        .case-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .case-image-wrap:hover img {
            transform: scale(1.05);
        }

        .case-info {
            padding: 15px;
        }

        .case-tag {
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 5px;
            display: block;
        }

        .case-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 5px;
        }

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

        /* 对比评测 - 突出9.9分五星 */
        .comparison-wrapper {
            background: var(--bg-white);
            border-radius: 20px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }

        .rating-box {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: linear-gradient(135deg, var(--primary-light), rgba(6, 182, 212, 0.1));
            padding: 25px;
            border-radius: 12px;
            margin-bottom: 30px;
        }

        .rating-text h4 {
            font-size: 20px;
            color: var(--text-dark);
            margin-bottom: 5px;
        }

        .rating-score {
            display: flex;
            align-items: baseline;
            gap: 5px;
        }

        .score-num {
            font-size: 48px;
            font-weight: 800;
            color: var(--primary);
        }

        .score-max {
            font-size: 18px;
            color: var(--text-muted);
        }

        .stars-gold {
            color: #fbbf24;
            font-size: 24px;
            letter-spacing: 2px;
        }

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

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

        .comparison-table th, .comparison-table td {
            padding: 15px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

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

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

        /* Token 比价参考 */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .price-card {
            background: var(--bg-white);
            border-radius: 12px;
            padding: 25px;
            border: 1px solid var(--border-color);
            position: relative;
        }

        .price-card.hot {
            border-color: var(--primary);
            box-shadow: 0 8px 25px rgba(37,99,235,0.08);
        }

        .price-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--primary);
            color: #fff;
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 10px;
        }

        .price-model {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .price-tagline {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        .price-value {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 20px;
        }

        .price-value span {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: normal;
        }

        .price-features {
            list-style: none;
            font-size: 13px;
            color: var(--text-main);
            margin-bottom: 20px;
        }

        .price-features li {
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* 培训中心 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

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

        .training-card:hover {
            border-color: var(--secondary);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(139,92,246,0.05);
        }

        .training-icon {
            font-size: 28px;
            margin-bottom: 12px;
            display: block;
        }

        .training-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .training-tag {
            display: inline-block;
            font-size: 11px;
            color: var(--secondary);
            background: rgba(139,92,246,0.08);
            padding: 2px 8px;
            border-radius: 20px;
            font-weight: 600;
        }

        /* FAQ折叠面板 */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.3s;
        }

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

        .faq-question {
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-muted);
            border-top: 0 solid var(--border-color);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 15px 20px 20px;
            border-top-width: 1px;
        }

        .faq-icon::after {
            content: '+';
            font-size: 20px;
            font-weight: normal;
        }

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

        /* 常见问题自助排查与术语百科 */
        .troubleshoot-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .pane-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
        }

        .pane-card h4 {
            font-size: 18px;
            color: var(--text-dark);
            margin-bottom: 15px;
            border-left: 4px solid var(--accent);
            padding-left: 10px;
        }

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

        .pane-list li {
            padding: 10px 0;
            border-bottom: 1px solid #f1f5f9;
            font-size: 13px;
        }

        .pane-list li:last-child {
            border: none;
        }

        .pane-list strong {
            color: var(--text-dark);
            display: block;
            margin-bottom: 3px;
        }

        /* 用户评论 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .review-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
        }

        .review-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
        }

        .review-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }

        .review-user-info h5 {
            font-size: 14px;
            color: var(--text-dark);
            margin-bottom: 2px;
        }

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

        .review-content {
            font-size: 13px;
            color: var(--text-main);
            position: relative;
        }

        /* 行业资讯 / 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 30px;
        }

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

        .article-item {
            background: var(--bg-white);
            border-radius: 8px;
            border: 1px solid var(--border-color);
            padding: 18px;
            transition: border-color 0.3s;
        }

        .article-item:hover {
            border-color: var(--primary);
        }

        .article-title-link {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            text-decoration: none;
            display: block;
            margin-bottom: 8px;
        }

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

        .article-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            gap: 15px;
        }

        /* 智能需求匹配表单与联系我们 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
        }

        .contact-details {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-methods {
            list-style: none;
            margin-bottom: 30px;
        }

        .contact-methods li {
            font-size: 15px;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .qr-item {
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 10px;
            border-radius: 8px;
            text-align: center;
            width: 140px;
        }

        .qr-item img {
            width: 100%;
            height: auto;
            border-radius: 4px;
            margin-bottom: 5px;
        }

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

        .contact-form {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.02);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-bottom: 15px;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
        }

        .form-control {
            width: 100%;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 10px 14px;
            font-size: 14px;
            outline: none;
            transition: border-color 0.3s;
        }

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

        .btn-submit {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            border: none;
            width: 100%;
            padding: 12px;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: opacity 0.3s;
        }

        .btn-submit:hover {
            opacity: 0.9;
        }

        /* 友情链接 */
        .friend-links {
            padding: 20px 0;
            background: var(--bg-white);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }

        .friend-links-title {
            font-size: 13px;
            font-weight: 700;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .friend-links-container {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px 25px;
        }

        .friend-links-container a {
            font-size: 13px;
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.3s;
        }

        .friend-links-container a:hover {
            color: var(--primary);
        }

        /* 页脚 */
        footer {
            background: var(--text-dark);
            color: #cbd5e1;
            padding: 50px 0 20px;
            font-size: 13px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

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

        .footer-brand p {
            color: #94a3b8;
            margin-bottom: 15px;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 14px;
            margin-bottom: 15px;
        }

        .footer-links {
            list-style: none;
        }

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

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            text-align: center;
            color: #64748b;
        }

        /* 侧边浮动栏 */
        .float-panel {
            position: fixed;
            right: 20px;
            bottom: 40px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 999;
        }

        .float-btn {
            width: 48px;
            height: 48px;
            background: #fff;
            border-radius: 50%;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: transform 0.3s;
        }

        .float-btn:hover {
            transform: scale(1.05);
        }

        .float-btn svg {
            width: 20px;
            height: 20px;
            fill: var(--text-dark);
        }

        .float-qr {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #fff;
            padding: 10px;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            display: none;
            width: 140px;
            text-align: center;
        }

        .float-qr img {
            width: 100%;
            height: auto;
            border-radius: 4px;
            margin-bottom: 5px;
        }

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

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

        /* 移动端适配 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .solutions-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .workflow-timeline {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .workflow-timeline::before {
                display: none;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
                box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            }
            .nav-links.show {
                display: flex;
            }
            .about-grid, .network-grid, .troubleshoot-grid, .contact-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 25px;
            }
            .price-grid {
                grid-template-columns: 1fr;
            }
            .reviews-grid {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            h1.hero-title {
                font-size: 28px;
            }
        }