:root {
      --primary: #581c87;
      --primary-accent: #7c3aed;
      --vibrant-pink: #ec4899;
      --vibrant-amber: #f59e0b;
      --vibrant-cyan: #06b6d4;
      --bg-light: #faf5ff;
      --surface-white: #ffffff;
      --text-main: #1e1b4b;
      --text-muted: #4b5563;
      --border-color: #f3e8ff;
      --shadow-sm: 0 4px 6px -1px rgba(124, 58, 237, 0.08);
      --shadow-md: 0 12px 24px -4px rgba(124, 58, 237, 0.12);
      --shadow-lg: 0 20px 32px -6px rgba(124, 58, 237, 0.18);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-light);
      background-image: 
        radial-gradient(at 0% 0%, rgba(236, 72, 153, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(124, 58, 237, 0.08) 0px, transparent 50%);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-container {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      padding: 8px 14px;
      text-decoration: none;
      color: var(--text-main);
      font-weight: 600;
      font-size: 14px;
      transition: all 0.2s ease;
      display: inline-block;
    }
    .nav-links li a:hover {
      color: var(--vibrant-pink);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 999px;
      font-weight: 600;
      text-decoration: none;
      transition: all 0.25s ease;
      font-size: 14px;
      border: 1px solid transparent;
      cursor: pointer;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--vibrant-pink), var(--primary-accent));
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(236, 72, 153, 0.35);
    }
    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(236, 72, 153, 0.45);
    }
    .btn-secondary {
      background: #ffffff;
      color: var(--primary);
      border-color: var(--border-color);
    }
    .btn-secondary:hover {
      background: #fdf2f8;
      border-color: var(--vibrant-pink);
    }
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }
    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: linear-gradient(135deg, rgba(236, 72, 153, 0.12), rgba(124, 58, 237, 0.12));
      border: 1px solid rgba(236, 72, 153, 0.3);
      border-radius: 999px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(135deg, var(--vibrant-pink), var(--primary-accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }
    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .metric-card {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--vibrant-pink);
    }
    .metric-number {
      font-size: 32px;
      font-weight: 800;
      color: var(--vibrant-pink);
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 600;
    }
    /* 公共区域 */
    section.section-block {
      padding: 64px 0;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }
    .section-eyebrow {
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--vibrant-pink);
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 15px;
      color: var(--text-muted);
    }
    /* 平台介绍 & 服务能力 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-accent);
    }
    .service-badge {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 700;
      background: #fdf2f8;
      color: var(--vibrant-pink);
      margin-bottom: 16px;
      width: fit-content;
    }
    .service-card h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .service-points {
      list-style: none;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .service-points li::before {
      content: "✓";
      color: var(--vibrant-pink);
      font-weight: 800;
      margin-right: 6px;
    }
    /* 聚合模型网格 */
    .models-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 32px;
    }
    .model-chip {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      padding: 8px 18px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }
    .model-chip:hover {
      border-color: var(--vibrant-pink);
      background: #fdf2f8;
      color: var(--vibrant-pink);
      transform: scale(1.05);
    }
    /* 案例中心 & 宣传图片展示 */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      align-items: center;
    }
    .image-card {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .image-card img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .image-card:hover img {
      transform: scale(1.03);
    }
    .image-info {
      padding: 20px;
    }
    .image-info h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .image-info p {
      font-size: 13px;
      color: var(--text-muted);
    }
    /* 对比评测表格 */
    .compare-container {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
      overflow-x: auto;
    }
    .review-score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #fdf2f8, #f5f3ff);
      padding: 20px 28px;
      border-radius: var(--radius-md);
      margin-bottom: 28px;
      border: 1px solid rgba(236, 72, 153, 0.2);
    }
    .score-badge {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .score-number {
      font-size: 38px;
      font-weight: 900;
      color: var(--vibrant-pink);
    }
    .score-stars {
      color: var(--vibrant-amber);
      font-size: 20px;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 18px;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background: #faf5ff;
      color: var(--text-main);
      font-weight: 700;
    }
    .highlight-col {
      background: rgba(236, 72, 153, 0.04);
      color: var(--primary-accent);
      font-weight: 700;
    }
    /* 流程步骤 */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-badge {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--vibrant-pink), var(--primary-accent));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 16px;
      font-size: 15px;
    }
    .step-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
    }
    /* 客户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .review-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 14px;
    }
    .review-user {
      font-weight: 700;
      font-size: 15px;
    }
    .review-role {
      font-size: 12px;
      color: var(--vibrant-pink);
      background: #fdf2f8;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .review-content {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.65;
    }
    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-question span.icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--primary-accent);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-question span.icon {
      transform: rotate(45deg);
    }
    /* 表单与需求匹配 */
    .form-box {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      max-width: 760px;
      margin: 0 auto;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #faf5ff;
      outline: none;
      transition: border 0.2s ease;
    }
    .form-control:focus {
      border-color: var(--vibrant-pink);
      background: #fff;
    }
    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }
    /* 文章与友情链接区 */
    .articles-links-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin-top: 32px;
    }
    .box-widget {
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }
    .box-widget h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--primary);
    }
    .link-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .link-list a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 13px;
      background: #faf5ff;
      padding: 6px 12px;
      border-radius: 6px;
      border: 1px solid var(--border-color);
      transition: all 0.2s ease;
    }
    .link-list a:hover {
      color: var(--vibrant-pink);
      border-color: var(--vibrant-pink);
    }
    /* 页脚 */
    footer.site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 56px 0 28px;
      color: var(--text-muted);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-col h5 {
      color: var(--text-main);
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul li a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s ease;
    }
    .footer-col ul li a:hover {
      color: var(--vibrant-pink);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }
    /* 浮动客服入口 */
    .float-dock {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--surface-white);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      position: relative;
    }
    .float-qr {
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #fff;
      padding: 12px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      display: none;
      width: 150px;
      text-align: center;
    }
    .float-qr img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }
    .float-qr span {
      font-size: 11px;
      color: var(--text-muted);
    }
    .float-btn:hover .float-qr {
      display: block;
    }
    /* 响应式适配 */
    @media (max-width: 992px) {
      .services-grid, .reviews-grid, .steps-wrapper {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 16px 24px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .services-grid, .reviews-grid, .steps-wrapper, .showcase-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 28px;
      }
      .footer-grid, .articles-links-container {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }