/* -------------------------------------------------------------
       全站基础重置 & 色彩规范（多彩涂鸦风 - 活力且严谨）
       ------------------------------------------------------------- */
    :root {
      --primary: #ff4757;
      --primary-hover: #ff6b81;
      --secondary: #2ed573;
      --accent-yellow: #ffa502;
      --accent-blue: #1e90ff;
      --accent-purple: #70a1ff;
      --bg-main: #fcfbf7;
      --bg-card: #ffffff;
      --text-dark: #1e293b;
      --text-muted: #64748b;
      --border-doodle: #0f172a;
      --shadow-doodle: 4px 4px 0px #0f172a;
      --shadow-doodle-lg: 6px 6px 0px #0f172a;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

    * {
      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-dark);
      line-height: 1.6;
    }

    /* 统一中心容器 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 涂鸦风卡片与通用组件基类 */
    .doodle-card {
      background: var(--bg-card);
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-doodle);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      padding: 24px;
    }
    .doodle-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-doodle-lg);
    }

    .doodle-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      background-color: var(--primary);
      border: 2px solid var(--border-doodle);
      border-radius: 50px;
      box-shadow: var(--shadow-doodle);
      cursor: pointer;
      text-decoration: none;
      transition: all 0.2s ease;
    }
    .doodle-btn:hover {
      background-color: var(--primary-hover);
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0px var(--border-doodle);
    }
    .doodle-btn.btn-blue { background-color: var(--accent-blue); }
    .doodle-btn.btn-green { background-color: var(--secondary); color: #0f172a; }
    .doodle-btn.btn-yellow { background-color: var(--accent-yellow); color: #0f172a; }

    .badge-doodle {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 700;
      border: 2px solid var(--border-doodle);
      border-radius: 20px;
      background: var(--accent-yellow);
      color: #0f172a;
      box-shadow: 2px 2px 0px var(--border-doodle);
      margin-bottom: 12px;
    }

    .section-title {
      text-align: center;
      margin-bottom: 40px;
    }
    .section-title h2 {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 10px;
      display: inline-block;
      position: relative;
    }
    .section-title h2::after {
      content: '';
      display: block;
      height: 8px;
      background: var(--accent-yellow);
      border: 1px solid var(--border-doodle);
      border-radius: 4px;
      margin-top: 4px;
    }
    .section-title p {
      color: var(--text-muted);
      font-size: 1.05rem;
    }

    /* -------------------------------------------------------------
       1. 顶部导航 (Header & Navigation)
       ------------------------------------------------------------- */
    header.main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(252, 251, 247, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 2px solid var(--border-doodle);
      padding: 12px 0;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
    }
    .ai-page-logo {
      max-height: 44px;
      width: auto;
      object-fit: contain;
    }
    .brand-name {
      font-size: 1.3rem;
      font-weight: 900;
      color: var(--text-dark);
      letter-spacing: -0.5px;
    }

    /* CSS 要求: .nav-links 的 gap 属性设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li {
      margin: 0 4px;
    }
    .nav-links a, .ai-page-home-link {
      display: inline-block;
      padding: 6px 12px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-dark);
      text-decoration: none;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }
    .nav-links a:hover, .ai-page-home-link:hover {
      background: var(--accent-yellow);
      border: 1.5px solid var(--border-doodle);
      transform: rotate(-1deg);
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 2px solid var(--border-doodle);
      border-radius: 8px;
      padding: 6px 10px;
      font-weight: bold;
      cursor: pointer;
    }

    /* -------------------------------------------------------------
       2. Hero 首屏 (严格无图片)
       ------------------------------------------------------------- */
    .hero-section {
      padding: 70px 0 50px 0;
      background: linear-gradient(135deg, #fff9e6 0%, #edf2ff 100%);
      border-bottom: 2px solid var(--border-doodle);
      position: relative;
    }
    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 2.5rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 16px;
      color: var(--text-dark);
    }
    .hero-content h1 span {
      background: var(--accent-yellow);
      padding: 2px 10px;
      border: 2px solid var(--border-doodle);
      border-radius: 8px;
      box-shadow: 2px 2px 0px var(--border-doodle);
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      margin-bottom: 30px;
    }
    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .hero-tag-item {
      font-size: 0.82rem;
      font-weight: 700;
      background: #ffffff;
      border: 1.5px solid var(--border-doodle);
      padding: 4px 10px;
      border-radius: 20px;
      box-shadow: 2px 2px 0px rgba(0,0,0,0.1);
    }
    .hero-card-box {
      background: #ffffff;
      border: 3px solid var(--border-doodle);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 6px 6px 0px var(--border-doodle);
    }
    .hero-card-header {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .hero-stat-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .stat-item {
      background: #f8fafc;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      padding: 14px;
      text-align: center;
    }
    .stat-num {
      font-size: 1.6rem;
      font-weight: 900;
      color: var(--primary);
    }
    .stat-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* -------------------------------------------------------------
       通用 Section 布局样式
       ------------------------------------------------------------- */
    section.page-section {
      padding: 60px 0;
      border-bottom: 2px solid var(--border-doodle);
    }

    /* -------------------------------------------------------------
       3. 数据指标 (Data Stats)
       ------------------------------------------------------------- */
    .stats-bar-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }
    .stat-card-doodle {
      text-align: center;
      background: #ffffff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-doodle);
    }
    .stat-card-doodle .num {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--accent-blue);
    }

    /* -------------------------------------------------------------
       4. 关于我们 & 平台介绍 (About & Platform)
       ------------------------------------------------------------- */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }
    .feature-list-check {
      list-style: none;
      margin-top: 15px;
    }
    .feature-list-check li {
      margin-bottom: 10px;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .feature-list-check li::before {
      content: '✓';
      display: inline-block;
      width: 22px;
      height: 22px;
      background: var(--secondary);
      border: 1.5px solid var(--border-doodle);
      border-radius: 50%;
      text-align: center;
      line-height: 20px;
      font-size: 12px;
    }

    /* -------------------------------------------------------------
       5. AIGC服务 & 一站式制作 (Services Grid)
       ------------------------------------------------------------- */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
      gap: 24px;
    }
    .service-card {
      position: relative;
      background: #ffffff;
    }
    .service-icon-box {
      width: 48px;
      height: 48px;
      border: 2px solid var(--border-doodle);
      border-radius: 12px;
      background: var(--accent-yellow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 14px;
      box-shadow: 2px 2px 0px var(--border-doodle);
    }
    .service-card h3 {
      font-size: 1.2rem;
      margin-bottom: 8px;
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* -------------------------------------------------------------
       6. 支持的 AI 平台标签云 (Model Cloud)
       ------------------------------------------------------------- */
    .model-cloud-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      padding: 10px 0;
    }
    .model-chip {
      background: #ffffff;
      border: 2px solid var(--border-doodle);
      padding: 8px 16px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 0.9rem;
      box-shadow: 2px 2px 0px var(--border-doodle);
      transition: all 0.2s ease;
    }
    .model-chip:hover {
      background: var(--accent-purple);
      color: #ffffff;
      transform: scale(1.05);
    }

    /* -------------------------------------------------------------
       7. 行业方案 & 案例中心 (Cases Showcase with Images)
       ------------------------------------------------------------- */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .case-card {
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .case-img-container {
      width: 100%;
      border-bottom: 2px solid var(--border-doodle);
      background: #f1f5f9;
      overflow: hidden;
    }
    .ai-page-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
    }
    .case-info {
      padding: 16px;
      flex-grow: 1;
    }
    .case-info h4 {
      font-size: 1.1rem;
      margin-bottom: 6px;
    }

    /* -------------------------------------------------------------
       8. 对比评测 (Comparison Table & Ratings)
       ------------------------------------------------------------- */
    .rating-header-box {
      background: #fff9e6;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      margin-bottom: 30px;
      box-shadow: var(--shadow-doodle);
    }
    .stars-score {
      font-size: 2rem;
      color: var(--accent-yellow);
      font-weight: 900;
      text-shadow: 1px 1px 0px #0f172a;
    }
    .table-container {
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #ffffff;
    }
    .compare-table th, .compare-table td {
      padding: 14px 16px;
      text-align: center;
      border-bottom: 1.5px solid #e2e8f0;
      border-right: 1.5px solid #e2e8f0;
      font-size: 0.95rem;
    }
    .compare-table th {
      background: #f8fafc;
      font-weight: 800;
      border-bottom: 2px solid var(--border-doodle);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table td.highlight {
      background: #f0fdf4;
      font-weight: 700;
      color: #166534;
    }

    /* -------------------------------------------------------------
       9. Token 比价参考
       ------------------------------------------------------------- */
    .token-pricing-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }
    .token-card {
      background: #ffffff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-doodle);
    }
    .token-card .price {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--primary);
      margin: 10px 0;
    }

    /* -------------------------------------------------------------
       10. 客户评论卡片 (6 条真实评论)
       ------------------------------------------------------------- */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 15px;
    }
    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border: 2px solid var(--border-doodle);
      border-radius: 50%;
      background: var(--accent-purple);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #ffffff;
    }
    .reviewer-info h5 {
      font-size: 0.95rem;
      margin-bottom: 2px;
    }
    .reviewer-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* -------------------------------------------------------------
       11. 标准流程与服务网络
       ------------------------------------------------------------- */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 16px;
    }
    .step-box {
      background: #ffffff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      padding: 16px;
      box-shadow: var(--shadow-doodle);
      position: relative;
    }
    .step-num {
      position: absolute;
      top: -12px;
      right: 12px;
      background: var(--accent-yellow);
      border: 1.5px solid var(--border-doodle);
      border-radius: 12px;
      padding: 2px 8px;
      font-size: 0.75rem;
      font-weight: 900;
    }

    /* -------------------------------------------------------------
       12. FAQ 折叠面板
       ------------------------------------------------------------- */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      box-shadow: 3px 3px 0px var(--border-doodle);
      overflow: hidden;
    }
    .faq-question {
      padding: 16px 20px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
    }
    .faq-answer {
      display: none;
      padding: 0 20px 16px 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
      border-top: 1px dashed #e2e8f0;
      margin-top: 6px;
      padding-top: 12px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-toggle-icon {
      font-weight: bold;
      transition: transform 0.2s;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }

    /* -------------------------------------------------------------
       13. 需求匹配与联系表单 (Form Submission)
       ------------------------------------------------------------- */
    .form-grid-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-weight: 700;
      font-size: 0.9rem;
    }
    .form-control {
      padding: 12px 14px;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      background: #ffffff;
    }
    .form-control:focus {
      border-color: var(--accent-blue);
      box-shadow: 2px 2px 0px var(--accent-blue);
    }

    .qr-card-box {
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }
    .qr-card-box img {
      max-width: 180px;
      height: auto;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
    }

    /* -------------------------------------------------------------
       14. 最新文章与 AI 百科 (Industry Articles)
       ------------------------------------------------------------- */
    .articles-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 16px;
    }
    .article-item {
      background: #ffffff;
      border: 2px solid var(--border-doodle);
      border-radius: var(--radius-sm);
      padding: 16px;
      box-shadow: var(--shadow-doodle);
    }
    .article-item a {
      color: var(--text-dark);
      font-weight: 700;
      text-decoration: none;

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

    /* -------------------------------------------------------------
       15. 页脚与友情链接 (Footer)
       ------------------------------------------------------------- */
    footer.main-footer {
      background: #0f172a;
      color: #f8fafc;
      padding: 50px 0 20px 0;
      border-top: 3px solid var(--border-doodle);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 30px;
    }
    .footer-brand h4 {
      font-size: 1.4rem;
      margin-bottom: 10px;
      color: #ffffff;
    }
    .footer-brand p {
      font-size: 0.9rem;
      color: #94a3b8;
    }
    .footer-links h5, .friend-links-box h5 {
      font-size: 1.05rem;
      margin-bottom: 12px;
      color: var(--accent-yellow);
    }
    .footer-links ul {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a {
      color: #cbd5e1;
      text-decoration: none;
      font-size: 0.9rem;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .friend-links-box {
      border-top: 1px dashed #334155;
      padding-top: 20px;
      margin-bottom: 20px;
    }
    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .friend-links-list a {
      color: #94a3b8;
      font-size: 0.88rem;
      text-decoration: none;
    }
    .friend-links-list a:hover {
      color: var(--accent-yellow);
    }
    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      border-top: 1px solid #1e293b;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* -------------------------------------------------------------
       悬浮客服与返回顶部
       ------------------------------------------------------------- */
    .float-service-bar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-item {
      width: 48px;
      height: 48px;
      background: var(--accent-yellow);
      border: 2px solid var(--border-doodle);
      border-radius: 50%;
      box-shadow: 3px 3px 0px var(--border-doodle);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1rem;
      cursor: pointer;
      text-decoration: none;
      color: #0f172a;
    }
    .float-item:hover {
      transform: scale(1.1);
    }

    /* -------------------------------------------------------------
       响应式适配 (Responsive Styles)
       ------------------------------------------------------------- */
    @media (max-width: 900px) {
      .hero-wrapper, .about-grid, .form-grid-wrapper, .footer-grid {
        grid-template-columns: 1fr;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 2px solid var(--border-doodle);
        flex-direction: column;
        padding: 15px 0;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        margin: 6px 0;
      }
      .hero-content h1 {
        font-size: 1.8rem;
      }
    }