:root {
      --primary: #7c3aed;
      --primary-hover: #6d28d9;
      --primary-dark: #4c1d95;
      --primary-light: #f5f3ff;
      --accent: #d946ef;
      --accent-glow: rgba(192, 38, 211, 0.15);
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(124, 58, 237, 0.06);
      --shadow-md: 0 8px 24px rgba(124, 58, 237, 0.1);
      --shadow-lg: 0 16px 32px rgba(124, 58, 237, 0.14);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --container-width: 1200px;
    }

    * {
      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-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.2s ease;
    }

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

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

    /* 顶部导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

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

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

    .logo-box img.ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* 严格按照要求设置为 0 */
      list-style: none;
    }

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      color: var(--text-main);
      font-weight: 500;
      font-size: 15px;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      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: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
    }

    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background: transparent;
    }

    .btn-outline:hover {
      background: var(--primary-light);
    }

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

    /* 首屏 Hero - 严禁包含图片 */
    .hero-section {
      position: relative;
      padding: 80px 0 60px;
      background: linear-gradient(180deg, #f3e8ff 0%, #f8fafc 100%);
      overflow: hidden;
      text-align: center;
    }

    .hero-section::before {
      content: '';
      position: absolute;
      top: -100px;
      left: 50%;
      transform: translateX(-50%);
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(168, 85, 247, 0.25) 0%, rgba(255,255,255,0) 70%);
      pointer-events: none;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #e9d5ff;
      border-radius: 30px;
      color: var(--primary);
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 42px;
      font-weight: 800;
      color: #1e1b4b;
      margin-bottom: 20px;
      line-height: 1.25;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 19px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.6;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 40px;
    }

    .hero-features {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 24px;
      padding-top: 20px;
      border-top: 1px solid rgba(124, 58, 237, 0.1);
    }

    .hero-feature-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    .hero-feature-item span {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--primary);
    }

    /* 指标卡片 */
    .stats-section {
      padding: 40px 0;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: var(--bg-card);
      padding: 30px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      border: 1px solid #f1f5f9;
    }

    .stat-card {
      text-align: center;
      padding: 10px;
    }

    .stat-number {
      font-size: 36px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 8px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用Section */
    .section {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 50px;
    }

    .section-tag {
      color: var(--primary);
      font-size: 14px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

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

    /* 关于我们 / 平台介绍 */
    .about-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 24px;
      color: #1e1b4b;
      margin-bottom: 16px;
    }

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

    .about-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

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

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

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #c084fc;
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .service-card h4 {
      font-size: 19px;
      margin-bottom: 10px;
      color: var(--text-main);
    }

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

    /* 模型矩阵 */
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .model-pill {
      background: #f1f5f9;
      color: #334155;
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      border: 1px solid #e2e8f0;
      transition: all 0.2s;
    }

    .model-pill:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

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

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

    .step-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      opacity: 0.3;
      margin-bottom: 12px;
    }

    .step-card h5 {
      font-size: 17px;
      margin-bottom: 8px;
    }

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

    /* 对比表格 */
    .comparison-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
    }

    .rating-banner {
      background: linear-gradient(135deg, #6d28d9 0%, #9333ea 100%);
      color: #ffffff;
      padding: 20px 30px;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
    }

    .rating-score {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .score-big {
      font-size: 40px;
      font-weight: 900;
      line-height: 1;
    }

    .score-stars {
      color: #facc15;
      font-size: 20px;
    }

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

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

    .comparison-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }

    .comparison-table tr:hover td {
      background: #fdf4ff;
    }

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

    /* 案例展示区 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 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);
    }

    .case-img-box {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #edf2f7;
    }

    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-content {
      padding: 20px;
    }

    .case-content h4 {
      font-size: 17px;
      margin-bottom: 8px;
    }

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

    /* FAQ折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 20px;
      color: var(--primary);
      transition: transform 0.2s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #fafafa;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

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

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #a855f7 0%, #6d28d9 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .user-info h5 {
      font-size: 15px;
      margin-bottom: 2px;
    }

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

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

    /* 联系我们与需求表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .contact-info h3 {
      font-size: 24px;
      margin-bottom: 16px;
    }

    .contact-info p {
      color: var(--text-muted);
      font-size: 14px;
      margin-bottom: 24px;
    }

    .info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .info-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
    }

    .qr-box {
      margin-top: 20px;
      display: flex;
      align-items: center;
      gap: 16px;
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-sm);
      width: fit-content;
    }

    .qr-box img {
      width: 100px;
      height: 100px;
      border-radius: 4px;
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
    }

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

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

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

    /* 行业资讯 / 最新文章 */
    .article-links-box {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

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

    .article-list li a {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 10px;
      border-radius: var(--radius-sm);
      color: var(--text-main);
      font-size: 15px;
    }

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

    /* 加盟代理 */
    .agency-banner {
      background: linear-gradient(135deg, #4c1d95 0%, #7c3aed 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 50px;
      text-align: center;
    }

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

    .agency-banner p {
      max-width: 700px;
      margin: 0 auto 30px;
      opacity: 0.9;
    }

    /* 页脚 */
    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      margin-top: 70px;
      font-size: 14px;
    }

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

    .footer-col h5 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: #94a3b8;
    }

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

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }

    .friend-links a {
      color: #94a3b8;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
    }

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

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 浮动客服 */
    .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: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      cursor: pointer;
      font-size: 18px;
      transition: transform 0.2s;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .services-grid,
      .case-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-box,
      .contact-wrapper,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 30px;
      }
      .hero-subtitle {
        font-size: 16px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
      .nav-links.show {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .services-grid,
      .case-grid,
      .reviews-grid,
      .process-steps,
      .stats-grid {
        grid-template-columns: 1fr;
      }
      .agency-banner {
        padding: 30px 20px;
      }
    }