:root {
      --primary-color: #ff5500;
      --primary-hover: #e64a19;
      --primary-light: #fff3ed;
      --text-dark: #1f2329;
      --text-muted: #64748b;
      --bg-light: #fafafa;
      --bg-white: #ffffff;
      --border-color: #ffe0d1;
      --shadow-sm: 0 2px 8px rgba(255, 85, 0, 0.06);
      --shadow-md: 0 8px 24px rgba(255, 85, 0, 0.1);
      --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.08);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: color 0.3s ease;
    }

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

    .ai-container {
      width: 100%;
      max-width: 1200px;
      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, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(255, 85, 0, 0.15);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

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

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

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

    .nav-links {
      gap: 0;
      display: flex;
      align-items: center;
      list-style: none;
    }

    .nav-links li a {
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-dark);
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
      white-space: nowrap;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.3s ease;
      border: 1px solid transparent;
      text-decoration: none;
    }

    .btn-primary {
      background: linear-gradient(135deg, #ff6b00 0%, #ff3d00 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(255, 85, 0, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 85, 0, 0.4);
    }

    .btn-outline {
      border-color: var(--primary-color);
      color: var(--primary-color) !important;
      background-color: #ffffff;
    }

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

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

    /* 首屏 Section - 纯文字与图形动效，无图片 */
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 20%, rgba(255, 235, 224, 0.8) 0%, rgba(250, 250, 250, 1) 70%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-color);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 38px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #111827;
      margin-bottom: 20px;
      line-height: 1.25;
    }

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

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

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .stat-item h3 {
      font-size: 32px;
      color: var(--primary-color);
      font-weight: 800;
    }

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

    /* 各板块通用 */
    .section-padding {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      color: var(--primary-color);
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 关于我们 / 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .intro-text-content h3 {
      font-size: 24px;
      margin-bottom: 16px;
      color: #111827;
    }

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

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

    .model-tag {
      background-color: var(--primary-light);
      color: var(--primary-color);
      font-size: 12px;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid rgba(255, 85, 0, 0.2);
    }

    .intro-media-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    /* 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid #f0f0f0;
      transition: all 0.3s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--border-color);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-color);
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 20px;
    }

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

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

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

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

    .solution-item h5 {
      font-size: 16px;
      color: var(--primary-color);
      margin-bottom: 8px;
    }

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

    /* 标准流程 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      text-align: center;
      border: 1px solid #f0f0f0;
      position: relative;
    }

    .step-num {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, #ff6b00 0%, #ff3d00 100%);
      color: #fff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    /* 案例中心 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .case-body {
      padding: 20px;
    }

    .case-body h4 {
      font-size: 18px;
      margin-bottom: 8px;
    }

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

    /* 对比评测 - 突出推荐五星与9.9分 */
    .rating-badge-container {
      background: linear-gradient(135deg, #fff7f2 0%, #ffffff 100%);
      border: 2px solid var(--primary-color);
      border-radius: var(--radius-md);
      padding: 30px;
      text-align: center;
      margin-bottom: 30px;
      box-shadow: var(--shadow-md);
    }

    .score-title {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 10px;
    }

    .score-main {
      font-size: 48px;
      font-weight: 900;
      color: var(--primary-color);
      line-height: 1;
      margin-bottom: 10px;
    }

    .stars-line {
      color: #ff9800;
      font-size: 24px;
      margin-bottom: 8px;
    }

    .comparison-table-wrapper {
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid #eee;
    }

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

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f0f0f0;
      font-size: 14px;
    }

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

    .comparison-table tr:hover {
      background-color: #fffaf7;
    }

    .highlight-cell {
      color: var(--primary-color);
      font-weight: 700;
    }

    /* Token 比价 */
    .pricing-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .price-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .price-card.featured {
      border: 2px solid var(--primary-color);
      box-shadow: var(--shadow-md);
      position: relative;
    }

    .price-card.featured::before {
      content: '最受欢迎';
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary-color);
      color: #ffffff;
      font-size: 12px;
      padding: 2px 12px;
      border-radius: 12px;
    }

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

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

    .review-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid #eee;
      box-shadow: var(--shadow-sm);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

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

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

    .review-text {
      font-size: 14px;
      color: #4b5563;
      line-height: 1.5;
    }

    /* FAQ */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      color: var(--text-dark);
    }

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

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

    .faq-answer {
      display: none;
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-muted);
      border-top: 1px solid #fff5f0;
      background: #fffcfb;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* 联系表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d1d5db;
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }

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

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

    /* 文章列表 & 友情链接 */
    .articles-box, .links-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid #eee;
      margin-top: 20px;
    }

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

    .article-link-item {
      display: inline-block;
      padding: 6px 14px;
      background: var(--bg-light);
      border-radius: 4px;
      font-size: 13px;
      color: var(--text-muted);
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 10px;
    }

    /* 底部结构 */
    .site-footer {
      background-color: #111827;
      color: #9ca3af;
      padding: 50px 0 30px;
      font-size: 14px;
      border-top: 3px solid var(--primary-color);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-info h4 {
      color: #ffffff;
      font-size: 18px;
      margin-bottom: 16px;
    }

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

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

    .footer-links li {
      margin-bottom: 8px;
    }

    .footer-links a {
      color: #9ca3af;
    }

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

    .footer-qr img {
      width: 110px;
      height: 110px;
      border-radius: 6px;
      margin-bottom: 8px;
    }

    .copyright-bar {
      border-top: 1px solid #1f2937;
      padding-top: 20px;
      text-align: center;
      font-size: 13px;
      color: #6b7280;
    }

    /* 侧边浮动 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-size: 12px;
      font-weight: bold;
      text-align: center;
      border: none;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .services-grid, .solutions-grid, .pricing-cards, .reviews-grid, .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .header-inner {
        position: relative;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid #eee;
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 26px;
      }
      .hero-stats, .intro-grid, .cases-grid, .contact-wrapper, .services-grid, .solutions-grid, .pricing-cards, .reviews-grid, .process-steps {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }