/* 全局变量与浅色霓虹科技基调 */
    :root {
      --bg-main: #f8fafc;
      --bg-surface: #ffffff;
      --bg-alt: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --accent-cyan: #06b6d4;
      --accent-purple: #8b5cf6;
      --neon-glow: rgba(37, 99, 235, 0.15);
      --border-color: #e2e8f0;
      --border-hover: #cbd5e1;
      --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --card-shadow-hover: 0 12px 30px -4px rgba(37, 99, 235, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-width: 1200px;
      --transition-normal: all 0.3s ease;
    }

    * {
      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(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background-color: var(--bg-main);
    }

    /* 容器控制 */
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* 严格符合规范 requirement */
      list-style: none;
    }

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      text-decoration: none;
      transition: var(--transition-normal);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: rgba(37, 99, 235, 0.06);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

    /* 通用按钮 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-md);
      text-decoration: none;
      transition: var(--transition-normal);
      cursor: pointer;
      border: 1px solid transparent;
      gap: 8px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #3b82f6);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
    }

    .btn-neon {
      background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(6, 182, 212, 0.35);
    }

    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(6, 182, 212, 0.5);
    }

    .btn-outline {
      background: var(--bg-surface);
      color: var(--text-main);
      border-color: var(--border-color);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: rgba(37, 99, 235, 0.04);
    }

    /* 区域标题通用样式 */
    .section-padding {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(37, 99, 235, 0.08);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      border-radius: 50px;
      margin-bottom: 12px;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }

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

    /* 1. HERO 首屏 (无图片规则) */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 50% 20%, rgba(6, 182, 212, 0.08) 0%, rgba(139, 92, 246, 0.05) 40%, rgba(248, 250, 252, 0) 70%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid rgba(37, 99, 235, 0.2);
      border-radius: 50px;
      font-size: 14px;
      color: var(--primary);
      font-weight: 600;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
      margin-bottom: 24px;
    }

    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      background-color: var(--accent-cyan);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-cyan);
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

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

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px auto;
      line-height: 1.6;
    }

    .hero-ctas {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      margin-top: 40px;
    }

    .metric-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      box-shadow: var(--card-shadow);
      transition: var(--transition-normal);
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: rgba(37, 99, 235, 0.3);
    }

    .metric-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

    /* 2. 关于我们 */
    .about-card {
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-info h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

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

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .model-tag {
      padding: 6px 12px;
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 13px;
      color: var(--text-main);
      font-weight: 500;
    }

    /* 3. AIGC服务 / 功能卡片阵列 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--card-shadow);
      transition: var(--transition-normal);
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: rgba(6, 182, 212, 0.4);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(6, 182, 212, 0.15));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
      color: var(--primary);
    }

    .service-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 4. 一站式制作 */
    .onestop-box {
      background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
    }

    .onestop-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 24px;
      margin-top: 30px;
    }

    .onestop-item {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .onestop-item h4 {
      font-size: 18px;
      color: var(--primary);
      margin-bottom: 8px;
    }

    /* 5. 行业方案 */
    .solution-tabs {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .solution-card {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      transition: var(--transition-normal);
    }

    .solution-card:hover {
      border-color: var(--accent-purple);
      box-shadow: var(--card-shadow-hover);
    }

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

    /* 6. 服务网络 */
    .network-container {
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .network-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .network-item {
      padding: 20px;
      background: var(--bg-alt);
      border-radius: var(--radius-sm);
    }

    /* 7. 标准流程 */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--card-shadow);
    }

    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
      color: #fff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px auto;
    }

    /* 8. 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .case-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background-color: #e2e8f0;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition-normal);
    }

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

    .case-content {
      padding: 20px;
    }

    .case-content h3 {
      font-size: 17px;
      margin-bottom: 8px;
    }

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

    /* 9. 对比评测 (五星 9.9分) */
    .rating-banner {
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(139, 92, 246, 0.08));
      border: 1px solid rgba(37, 99, 235, 0.2);
      border-radius: var(--radius-lg);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
    }

    .rating-score {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-val {
      font-size: 48px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .stars {
      color: #f59e0b;
      font-size: 20px;
      letter-spacing: 2px;
    }

    .compare-table-wrap {
      overflow-x: auto;
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }

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

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

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

    .highlight-col {
      background: rgba(37, 99, 235, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* 10. 需求匹配 */
    .matching-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--card-shadow);
    }

    /* 11. Token比价 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
    }

    .price-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      text-align: center;
      box-shadow: var(--card-shadow);
      transition: var(--transition-normal);
    }

    .price-card.popular {
      border-color: var(--primary);
      box-shadow: 0 8px 25px rgba(37, 99, 235, 0.15);
      position: relative;
    }

    .popular-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #fff;
      font-size: 12px;
      padding: 2px 12px;
      border-radius: 20px;
      font-weight: 600;
    }

    .price-val {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin: 16px 0;
    }

    .price-val span {
      font-size: 14px;
      color: var(--text-light);
      font-weight: 400;
    }

    /* 12 & 14. 帮助中心与AI百科 */
    .wiki-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .wiki-item {
      background: var(--bg-surface);
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

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

    /* 13. FAQ 折叠面板 (>=10条) */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition-normal);
    }

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

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 20px;
      color: var(--text-light);
      transition: var(--transition-normal);
    }

    .faq-item.active .faq-question::after {
      content: '−';
      color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background-color: var(--bg-main);
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 24px 20px 24px;
    }

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

    /* 15. 行业资讯与短代码 */
    .articles-container {
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid var(--border-color);
    }

    .article-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-link-item {
      display: inline-block;
      padding: 8px 16px;
      background: var(--bg-alt);
      border-radius: var(--radius-sm);
      color: var(--primary);
      text-decoration: none;
      font-size: 14px;
      transition: var(--transition-normal);
    }

    .article-link-item:hover {
      background: rgba(37, 99, 235, 0.1);
    }

    /* 16. 6条用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .author-info h5 {
      font-size: 15px;
      color: var(--text-main);
    }

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

    /* 17. 加盟代理 */
    .agent-banner {
      background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 30px;
      align-items: center;
    }

    .agent-banner h3 {
      font-size: 28px;
      margin-bottom: 12px;
    }

    .agent-banner p {
      color: #94a3b8;
      font-size: 16px;
    }

    /* 18. 联系我们与表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .form-group label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: var(--bg-main);
      color: var(--text-main);
      outline: none;
      transition: var(--transition-normal);
    }

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

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      gap: 20px;
      justify-content: center;
    }

    .qr-box {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: var(--bg-alt);
      border-radius: var(--radius-md);
    }

    .qr-box img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      object-fit: cover;
    }

    /* 页脚对齐规范 */
    .site-footer {
      background-color: #0f172a;
      color: #cbd5e1;
      padding: 60px 0 30px 0;
      margin-top: 60px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
    }

    .footer-col p, .footer-col li a {
      color: #94a3b8;
      font-size: 14px;
      text-decoration: none;
      line-height: 2;
    }

    .footer-col li a:hover {
      color: #ffffff;
    }

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

    .friend-links a {
      color: #94a3b8;
      font-size: 13px;
      text-decoration: none;
    }

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

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    .ai-page-home-link {
      color: var(--accent-cyan);
      text-decoration: none;
      font-weight: 600;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--primary);
      color: #fff;
      padding: 12px 18px;
      border-radius: 50px;
      box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      font-size: 14px;
      font-weight: 600;
      transition: var(--transition-normal);
    }

    .float-kefu:hover {
      transform: translateY(-4px);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .about-card, .contact-wrapper, .agent-banner {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title {
        font-size: 26px;
      }
      .section-title {
        font-size: 24px;
      }
    }