:root {
      --primary: #F59E0B;
      --primary-hover: #D97706;
      --primary-light: #FEF3C7;
      --primary-dark: #B45309;
      --accent-yellow: #FFD600;
      --dark-bg: #0F172A;
      --text-dark: #1E293B;
      --text-muted: #64748B;
      --bg-light: #FFFDF5;
      --bg-card: #FFFFFF;
      --border-color: #FDE68A;
      --shadow-sm: 0 2px 8px rgba(245, 158, 11, 0.08);
      --shadow-md: 0 8px 24px rgba(245, 158, 11, 0.12);
      --shadow-lg: 0 16px 32px rgba(15, 23, 42, 0.1);
      --radius: 12px;
      --container-width: 1200px;
    }

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

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

    body {
      overflow-x: hidden;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-zone {
      display: flex;
      align-items: center;
      gap: 16px;
    }

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

    .ai-page-home-link {
      font-weight: 700;
      color: var(--text-dark);
      text-decoration: none;
      font-size: 16px;
      padding: 6px 12px;
      background: var(--primary-light);
      border-radius: 6px;
      transition: all 0.3s ease;
    }

    .ai-page-home-link:hover {
      background: var(--primary);
      color: #fff;
    }

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

    .nav-links li a {
      color: var(--text-dark);
      text-decoration: none;
      font-size: 14px;
      font-weight: 600;
      padding: 8px 12px;
      border-radius: 6px;
      transition: all 0.2s ease;
      display: inline-block;
      white-space: nowrap;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 700;
      border-radius: 8px;
      text-decoration: none;
      cursor: pointer;
      border: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 4px 12px rgba(245, 158, 11, 0.2);
    }

    .btn-primary {
      background: linear-gradient(135deg, #FFD600 0%, #F59E0B 100%);
      color: #0F172A;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
      background: linear-gradient(135deg, #FFE033 0%, #D97706 100%);
    }

    .btn-dark {
      background: var(--dark-bg);
      color: #FFFFFF;
    }

    .btn-dark:hover {
      background: #1E293B;
      transform: translateY(-2px);
    }

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

    /* Hero 首屏 (严格禁图) */
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 20%, #FFFBEB 0%, #FFFDF5 60%, #FEF3C7 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 18px;
      background: #FEF3C7;
      border: 1px solid var(--primary);
      color: var(--primary-dark);
      border-radius: 50px;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 24px;
    }

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

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 840px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .stat-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* Section 通用 */
    .section {
      padding: 80px 0;
      border-bottom: 1px solid rgba(253, 230, 138, 0.4);
    }

    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* 网格与卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

    .card {
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }

    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
      border-color: var(--primary);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--primary-dark);
      margin-bottom: 20px;
      font-weight: bold;
    }

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

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

    /* 流程步骤 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius);
      text-align: center;
      position: relative;
    }

    .step-idx {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #0F172A;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      margin: 0 auto 16px;
    }

    /* 对比表格 */
    .comparison-wrapper {
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }

    .rating-banner {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      color: #FFFFFF;
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-score {
      font-size: 36px;
      font-weight: 900;
      color: var(--accent-yellow);
      display: flex;
      align-items: center;
      gap: 8px;
    }

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

    .comparison-table th, .comparison-table td {
      padding: 16px 24px;
      border-bottom: 1px solid #F1F5F9;
      font-size: 15px;
    }

    .comparison-table th {
      background: #FEF3C7;
      color: var(--text-dark);
      font-weight: 700;
    }

    .comparison-table tr:hover {
      background: #FFFDF5;
    }

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

    /* 图片与案例 */
    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-img-box {
      width: 100%;
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #F1F5F9;
    }

    .ai-page-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .media-card:hover .ai-page-image {
      transform: scale(1.05);
    }

    .media-info {
      padding: 20px;
    }

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

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 17px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #FFFFFF;
    }

    .faq-question:hover {
      background: #FFFDF5;
    }

    .faq-answer {
      padding: 0 24px 20px;
      font-size: 15px;
      color: var(--text-muted);
      display: none;
      line-height: 1.7;
    }

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

    .faq-toggle {
      font-size: 20px;
      font-weight: bold;
      color: var(--primary-dark);
      transition: transform 0.3s ease;
    }

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

    /* 评论卡片 */
    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #0F172A;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 18px;
    }

    /* 需求匹配与标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 16px;
    }

    .tag {
      background: var(--primary-light);
      color: var(--primary-dark);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
    }

    /* 表单 */
    .form-box {
      background: var(--bg-card);
      border: 2px solid var(--primary);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-lg);
    }

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-dark);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #CBD5E1;
      border-radius: 8px;
      font-size: 15px;
      outline: none;
      transition: border 0.3s ease;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
    }

    /* 页脚 */
    .site-footer {
      background: var(--dark-bg);
      color: #94A3B8;
      padding: 60px 0 30px;
      border-top: 4px solid var(--primary);
    }

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

    .footer-title {
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }

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

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

    .footer-links a {
      color: #94A3B8;
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

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

    .friend-links a {
      color: #CBD5E1;
      text-decoration: none;
      font-size: 13px;
      background: rgba(255,255,255,0.05);
      padding: 4px 10px;
      border-radius: 4px;
    }

    .friend-links a:hover {
      color: var(--primary);
      background: rgba(255,255,255,0.1);
    }

    .copyright {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid #1E293B;
      font-size: 14px;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--bg-card);
      border: 2px solid var(--primary);
      border-radius: 12px;
      padding: 12px;
      box-shadow: var(--shadow-lg);
      text-align: center;
      width: 140px;
    }

    .float-kefu img {
      width: 100%;
      border-radius: 6px;
      margin-bottom: 6px;
    }

    .float-kefu span {
      font-size: 12px;
      font-weight: 700;
      color: var(--text-dark);
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .process-steps { grid-template-columns: repeat(3, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero-stats { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        border-bottom: 2px solid var(--primary);
      }
      .nav-links.active { display: flex; }
      .mobile-menu-btn { display: block; }
      .hero-title { font-size: 28px; }
      .hero-subtitle { font-size: 15px; }
      .grid-3, .grid-2 { grid-template-columns: 1fr; }
      .process-steps { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .float-kefu { display: none; }
    }