/* 全局 CSS 变量（斑斓彩调风：清爽浅色背景 + 高饱和渐变调性 + 深色易读文字） */
    :root {
      --primary: #6366f1;
      --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
      --accent-rainbow: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899, #f59e0b, #10b981);
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-card-alt: #f1f5f9;
      --text-dark: #0f172a;
      --text-medium: #334155;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --border-focus: #8b5cf6;
      --shadow-sm: 0 2px 8px rgba(99, 102, 241, 0.06);
      --shadow-md: 0 8px 24px rgba(99, 102, 241, 0.1);
      --shadow-lg: 0 16px 32px rgba(168, 85, 247, 0.15);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
    }

    * {
      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;
    }

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

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

    a:hover {
      opacity: 0.85;
    }

    /* 外层主容器规范 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

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

    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

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

    .nav-links li a {
      padding: 10px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-medium);
      display: inline-block;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(99, 102, 241, 0.08);
    }

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

    .btn-rainbow {
      background: var(--primary-gradient);
      color: #ffffff !important;
      padding: 10px 22px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 14px;
      box-shadow: var(--shadow-sm);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-rainbow:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }

    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 8px 18px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

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

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

    /* 模块通用样式 */
    .section-block {
      padding: 80px 0;
      position: relative;
    }

    .section-block.alt-bg {
      background-color: var(--bg-card-alt);
    }

    .section-title-box {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: linear-gradient(90deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
      color: var(--primary);
      border-radius: 20px;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 12px;
      border: 1px solid rgba(99, 102, 241, 0.2);
    }

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

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

    /* 首屏 HERO 区域 - 严格禁用任何图片 */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.08) 0%, rgba(236, 72, 153, 0.05) 50%, rgba(248, 250, 252, 1) 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 18px;
      border-radius: 30px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(99, 102, 241, 0.2);
      font-size: 14px;
      color: var(--text-medium);
      margin-bottom: 24px;
    }

    .hero-badge span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      font-weight: 700;
    }

    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      color: var(--text-dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px auto;
    }

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

    .btn-hero-primary {
      padding: 14px 36px;
      font-size: 16px;
      font-weight: 700;
      border-radius: 50px;
      background: var(--primary-gradient);
      color: #ffffff !important;
      box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
    }

    .btn-hero-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(99, 102, 241, 0.4);
    }

    .btn-hero-secondary {
      padding: 14px 32px;
      font-size: 16px;
      font-weight: 600;
      border-radius: 50px;
      background: #ffffff;
      color: var(--text-dark);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .btn-hero-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 首屏数据指标卡片 */
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

    .metric-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      border-top: 4px solid var(--primary);
    }

    .metric-card:nth-child(2) { border-top-color: #ec4899; }
    .metric-card:nth-child(3) { border-top-color: #f59e0b; }
    .metric-card:nth-child(4) { border-top-color: #10b981; }

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

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

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

    .about-content {
      font-size: 16px;
      color: var(--text-medium);
    }

    .about-content p {
      margin-bottom: 16px;
    }

    .model-chips-box {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .chip-group-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 14px;
    }

    .chips-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .model-chip {
      background: var(--bg-card-alt);
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-medium);
      border: 1px solid var(--border-color);
    }

    .model-chip.highlight {
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
      color: var(--primary);
      border-color: rgba(99, 102, 241, 0.3);
    }

    /* 服务能力与场景矩阵网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--primary-gradient);
      opacity: 0;
      transition: opacity 0.3s ease;
    }

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

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

    .service-icon-text {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

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

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

    /* 一站式制作步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
    }

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

    .step-number {
      width: 36px;
      height: 36px;
      background: var(--primary-gradient);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin: 0 auto 12px auto;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* 行业方案 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .solution-item {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1fr solid var(--border-color);
      box-shadow: var(--shadow-sm);
      border-left: 4px solid var(--primary);
    }

    .solution-item:nth-child(2) { border-left-color: #ec4899; }
    .solution-item:nth-child(3) { border-left-color: #10b981; }
    .solution-item:nth-child(4) { border-left-color: #f59e0b; }
    .solution-item:nth-child(5) { border-left-color: #8b5cf6; }
    .solution-item:nth-child(6) { border-left-color: #06b6d4; }

    /* Token 比价表格 */
    .token-table-wrapper {
      background: #ffffff;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      overflow-x: auto;
      border: 1px solid var(--border-color);
    }

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

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

    .token-table th {
      background: var(--bg-card-alt);
      font-weight: 700;
      color: var(--text-dark);
    }

    .price-tag {
      color: #10b981;
      font-weight: 700;
    }

    /* 对比评测板块 */
    .compare-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(236, 72, 153, 0.08));
      padding: 24px 32px;
      border-radius: var(--radius-md);
      margin-bottom: 30px;
      border: 1px solid rgba(99, 102, 241, 0.2);
    }

    .score-left h3 {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-dark);
    }

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

    .score-num {
      font-size: 36px;
      font-weight: 900;
      color: var(--primary);
    }

    .star-rating {
      color: #f59e0b;
      font-size: 20px;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
    }

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

    .compare-table th {
      text-align: left;
      font-size: 15px;
      font-weight: 700;
      background: var(--bg-card-alt);
    }

    .check-yes {
      color: #10b981;
      font-weight: 700;
    }

    .check-no {
      color: var(--text-muted);
    }

    /* 案例中心 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .case-img-holder {
      width: 100%;
      overflow: hidden;
    }

    .ai-page-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .case-card:hover .ai-page-image {
      transform: scale(1.03);
    }

    .case-info {
      padding: 20px;
    }

    .case-info h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* 评论板块 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

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

    .user-meta h5 {
      font-size: 15px;
      font-weight: 700;
    }

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

    .review-text {
      font-size: 14px;
      color: var(--text-medium);
      line-height: 1.6;
    }

    /* FAQ 手风琴 */
    .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: 700;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
    }

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

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

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

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

    /* 文章列表 & 友情链接 */
    .news-wrapper {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .news-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .news-list li a {
      display: flex;
      justify-content: space-between;
      font-size: 15px;
      color: var(--text-medium);
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    .news-list li a:hover {
      color: var(--primary);
    }

    /* 表单与联系区 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-info-card {
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .contact-item {
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .contact-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
    }

    .contact-val {
      font-size: 16px;
      color: var(--text-dark);
      font-weight: 700;
    }

    .qr-box {
      margin-top: 20px;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-box img {
      width: 120px;
      height: 120px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .form-card {
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .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;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: border-color 0.2s ease;
    }

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

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

    /* 加盟代理板块 */
    .agency-box {
      background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
      color: #ffffff;
      padding: 50px;
      border-radius: var(--radius-lg);
      text-align: center;
    }

    .agency-box h3 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .agency-box p {
      font-size: 16px;
      color: #c7d2fe;
      max-width: 700px;
      margin: 0 auto 30px auto;
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 1px solid #1e293b;
    }

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

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

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a {
      color: #94a3b8;
      font-size: 14px;
    }

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

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

    .friend-links-box a {
      color: #94a3b8;
      font-size: 13px;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
    }

    .friend-links-box a:hover {
      color: #ffffff;
      background: var(--primary);
    }

    .footer-bottom {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid #1e293b;
      font-size: 13px;
      color: #64748b;
    }

    /* 悬浮客服 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .floating-kefu img {
      width: 100px;
      height: 100px;
      display: block;
      margin-bottom: 6px;
    }

    .floating-kefu p {
      font-size: 12px;
      font-weight: 700;
      color: var(--text-dark);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-metrics, .services-grid, .solutions-grid, .cases-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(3, 1fr);
      }
      .about-grid, .contact-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
    }

    @media (max-width: 600px) {
      .hero-metrics, .services-grid, .solutions-grid, .cases-grid, .reviews-grid, .process-timeline {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 26px;
      }
      .floating-kefu {
        display: none; /* 移动端隐藏浮动以保体验 */
      }
    }