:root {
      --primary-red: #ff4757;
      --primary-orange: #ff7f50;
      --primary-yellow: #ffa502;
      --primary-green: #2ed573;
      --primary-cyan: #1e90ff;
      --primary-purple: #9b59b6;
      --text-dark: #2c3e50;
      --text-muted: #636e72;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.08);
      --shadow-hover: 0 14px 30px rgba(0, 0, 0, 0.12);
      --rainbow-gradient: linear-gradient(135deg, #ff4757 0%, #ff7f50 20%, #ffa502 40%, #2ed573 60%, #1e90ff 80%, #9b59b6 100%);
      --soft-rainbow-bg: linear-gradient(180deg, #fff5f5 0%, #fffbf0 25%, #f0fff4 50%, #f0f7ff 75%, #faf5ff 100%);
    }

    * {
      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 {
      background: var(--soft-rainbow-bg);
      background-attachment: fixed;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.3s ease;
    }

    /* 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 transparent;
      border-image: var(--rainbow-gradient) 1;
      box-shadow: var(--shadow-sm);
    }

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

    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      background: var(--rainbow-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
      padding: 8px 12px;
      border-radius: 6px;
    }

    .nav-links a:hover {
      color: var(--primary-cyan);
      background: rgba(30, 144, 255, 0.08);
    }

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

    .btn-rainbow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      background: var(--rainbow-gradient);
      color: #ffffff !important;
      font-weight: 700;
      border-radius: 30px;
      box-shadow: 0 4px 15px rgba(255, 71, 87, 0.3);
      border: none;
      cursor: pointer;
      font-size: 14px;
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .btn-rainbow:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(30, 144, 255, 0.4);
    }

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

    /* 模块通用样式 */
    section {
      padding: 70px 0;
      position: relative;
    }

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

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      border-radius: 20px;
      background: rgba(30, 144, 255, 0.1);
      color: var(--primary-cyan);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #1e272e;
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .card {
      background: var(--bg-white);
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      position: relative;
      overflow: hidden;
    }

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

    .card-rainbow-top::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--rainbow-gradient);
    }

    /* Hero 首屏 (无图设计) */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
    }

    .hero-badge-glow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: rgba(255, 255, 255, 0.9);
      border-radius: 50px;
      border: 1px solid rgba(255, 127, 80, 0.3);
      box-shadow: 0 4px 20px rgba(255, 127, 80, 0.15);
      margin-bottom: 24px;
      font-size: 14px;
      font-weight: 700;
      color: var(--primary-red);
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #1a202c;
      letter-spacing: -1px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: #4a5568;
      max-width: 860px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .btn-large {
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 800;
      border-radius: 40px;
    }

    .btn-outline-glow {
      background: #ffffff;
      color: var(--text-dark);
      border: 2px solid #e2e8f0;
      padding: 12px 30px;
      border-radius: 40px;
      font-weight: 700;
      font-size: 16px;
      box-shadow: var(--shadow-sm);
    }

    .btn-outline-glow:hover {
      border-color: var(--primary-purple);
      color: var(--primary-purple);
      transform: translateY(-2px);
    }

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

    .hero-stat-card {
      padding: 24px 16px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(255, 255, 255, 0.8);
      border-radius: 14px;
      box-shadow: var(--shadow-sm);
    }

    .hero-stat-num {
      font-size: 32px;
      font-weight: 900;
      background: var(--rainbow-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
    }

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

    /* 平台矩阵与模型支持 */
    .models-marquee-wrap {
      background: #ffffff;
      padding: 20px 0;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      box-shadow: inset 0 2px 8px rgba(0,0,0,0.02);
      margin-bottom: 20px;
    }

    .models-tags-flex {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-tag {
      background: #f1f5f9;
      color: #334155;
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid #e2e8f0;
      transition: all 0.2s;
    }

    .model-tag:hover {
      background: var(--rainbow-gradient);
      color: #ffffff;
      border-color: transparent;
      transform: scale(1.05);
    }

    /* 服务能力与场景矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 18px;
      color: #ffffff;
      margin-bottom: 16px;
    }

    .service-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #1e293b;
    }

    .service-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .service-tag {
      font-size: 11px;
      color: #64748b;
      background: #f8fafc;
      padding: 4px 8px;
      border-radius: 4px;
      display: inline-block;
      align-self: flex-start;
      border: 1px solid #e2e8f0;
    }

    /* 图文视觉区 */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
      margin-bottom: 40px;
    }

    .media-img-holder {
      border-radius: 16px;
      overflow: hidden;
      border: 2px solid #ffffff;
      box-shadow: var(--shadow-md);
    }

    .media-img-holder img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-img-holder:hover img {
      transform: scale(1.02);
    }

    /* 评测与对比表格 */
    .rating-banner {
      background: var(--bg-white);
      border-radius: 16px;
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 20px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .rating-item {
      text-align: center;
    }

    .rating-score {
      font-size: 44px;
      font-weight: 900;
      color: var(--primary-red);
      line-height: 1;
      margin-bottom: 6px;
    }

    .rating-stars {
      color: var(--primary-yellow);
      font-size: 20px;
      margin-bottom: 4px;
    }

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

    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .custom-table th {
      background: #f8fafc;
      font-weight: 700;
      color: #334155;
    }

    .custom-table tr:last-child td {
      border-bottom: none;
    }

    .highlight-col {
      background: rgba(46, 213, 115, 0.05);
      font-weight: 700;
      color: #10b981;
    }

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

    .step-card {
      padding: 24px;
      text-align: center;
      background: #ffffff;
      border-radius: 14px;
      border: 1px solid var(--border-color);
      position: relative;
    }

    .step-number {
      width: 36px;
      height: 36px;
      line-height: 36px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      color: #ffffff;
      font-weight: 800;
      margin: 0 auto 14px;
      font-size: 16px;
    }

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

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

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

    .review-card {
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: #475569;
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 700;
      font-size: 14px;
    }

    .author-info h4 {
      font-size: 14px;
      font-weight: 700;
      color: #1e293b;
    }

    .author-info p {
      font-size: 12px;
      color: #94a3b8;
    }

    /* FAQ 手风琴 */
    .faq-container {
      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: 12px;
      overflow: hidden;
      transition: all 0.3s;
    }

    .faq-question {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      font-size: 15px;
      cursor: pointer;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary-cyan);
    }

    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s;
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px 24px;
      max-height: 300px;
    }

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

    /* 需求匹配与联系表单 */
    .contact-form-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border-radius: 20px;
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .contact-info-side {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .qr-holder {
      text-align: center;
      background: #f8fafc;
      padding: 20px;
      border-radius: 12px;
      border: 1px solid #e2e8f0;
      max-width: 220px;
      margin-top: 20px;
    }

    .qr-holder img {
      width: 160px;
      height: 160px;
      display: block;
      margin: 0 auto 10px;
      border-radius: 8px;
    }

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

    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: #334155;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      color: var(--text-dark);
      background: #f8fafc;
      transition: border-color 0.2s, background 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-cyan);
      background: #ffffff;
    }

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

    /* 资讯中心与文章列表 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
    }

    .article-item {
      background: #ffffff;
      padding: 16px 20px;
      border-radius: 10px;
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      font-weight: 600;
    }

    .article-item:hover {
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
      transform: translateX(4px);
    }

    /* 友情链接 */
    .friendly-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      justify-content: center;
      padding: 24px;
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
    }

    .friendly-links a {
      font-size: 13px;
      color: #64748b;
      padding: 4px 10px;
      border-radius: 4px;
      background: #f1f5f9;
    }

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

    /* 页脚 */
    .site-footer {
      background: #1e293b;
      color: #cbd5e1;
      padding: 50px 0 24px;
      border-top: 4px solid;
      border-image: var(--rainbow-gradient) 1;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

    .footer-col ul li {
      margin-bottom: 8px;
      font-size: 13px;
    }

    .footer-col ul li a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #94a3b8;
    }

    /* 浮动客服 */
    .floating-contact {
      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: #ffffff;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      position: relative;
      border: 1px solid var(--border-color);
      transition: transform 0.2s;
    }

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

    .float-qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 10px;
      box-shadow: var(--shadow-md);
      display: none;
      width: 150px;
      text-align: center;
      border: 1px solid var(--border-color);
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 4px;
    }

    .float-btn:hover .float-qr-popup {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-stats-grid, .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .media-showcase-grid, .contact-form-layout {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 32px;
      }
    }

    @media (max-width: 640px) {
      .hero-stats-grid, .process-steps {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
      }
    }