:root {
      --primary: #4f46e5;
      --primary-accent: #ff3366;
      --secondary-accent: #00d2ff;
      --amber-accent: #ff9900;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
      --card-shadow-hover: 0 20px 30px -10px rgba(79, 70, 229, 0.15);
      --container-max: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .site-container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }
    
    /* 顶部导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--primary);
    }
    .brand-box .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: 6px;
      transition: all 0.2s ease;
      display: inline-block;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: #f1f5f9;
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      cursor: pointer;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: linear-gradient(135deg, #4f46e5 0%, #ff3366 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 51, 102, 0.4);
      color: #ffffff;
    }
    .btn-outline {
      border-color: var(--border-color);
      background: #ffffff;
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 50px;
      background: radial-gradient(circle at 10% 20%, rgba(255, 51, 102, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(0, 210, 255, 0.06) 0%, transparent 40%),
                  #ffffff;
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      border-radius: 9999px;
      background: #fdf2f8;
      border: 1px solid #fbcfe8;
      color: #db2777;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .hero-title {
      font-size: clamp(2rem, 4vw, 3rem);
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }
    .hero-title span {
      background: linear-gradient(135deg, #4f46e5, #ff3366);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }
    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: 12px;
      box-shadow: var(--card-shadow);
      text-align: left;
    }
    .metric-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-accent);
      line-height: 1.1;
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用版块 */
    .section-wrap {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-wrap:nth-child(even) {
      background-color: #ffffff;
    }
    .section-header {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 48px;
    }
    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 网格卡片 */
    .grid-cards {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }
    .card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: #c7d2fe;
    }
    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: #eef2ff;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 16px;
      font-size: 1.2rem;
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .card-desc {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 平台标签云 */
    .platform-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }
    .platform-pill {
      background: #f1f5f9;
      border: 1px solid #cbd5e1;
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      transition: background 0.2s;
    }
    .platform-pill:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    /* 流程步骤 */
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }
    .step-idx {
      font-size: 2rem;
      font-weight: 900;
      color: #e2e8f0;
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-card:hover .step-idx {
      color: var(--primary-accent);
    }

    /* 对比表格与评测 */
    .eval-highlight {
      background: linear-gradient(135deg, #4f46e5, #ff3366);
      border-radius: 16px;
      padding: 30px;
      color: #ffffff;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 30px;
    }
    .eval-score-box {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }
    .eval-score {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
    }
    .eval-max {
      font-size: 1.25rem;
      opacity: 0.9;
    }
    .eval-stars {
      color: #fbbf24;
      font-size: 1.5rem;
    }
    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      box-shadow: var(--card-shadow);
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }
    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .eval-table th {
      background-color: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }
    .eval-table td:first-child {
      font-weight: 600;
    }
    .highlight-col {
      background-color: #fdf2f8;
      font-weight: 700;
      color: #db2777;
    }

    /* 素材图片展示 */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
      margin-top: 30px;
    }
    .media-card {
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      background: #ffffff;
      box-shadow: var(--card-shadow);
    }
    .media-img-wrap {
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-img-wrap.square {
      aspect-ratio: 1 / 1;
    }
    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .media-info {
      padding: 18px;
    }

    /* 客户评论 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-content {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }
    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #e2e8f0;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .reviewer-name {
      font-weight: 700;
      font-size: 0.95rem;
    }
    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: 10px;
      background: #ffffff;
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }
    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
    }
    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      font-weight: 400;
      transition: transform 0.2s ease;
    }
    .faq-item.active .faq-question::after {
      content: "-";
    }
    .faq-answer {
      padding: 0 24px 18px;
      font-size: 0.95rem;
      color: var(--text-muted);
      display: none;
      line-height: 1.6;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 表单与需求匹配 */
    .form-wrap {
      max-width: 600px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 32px;
      box-shadow: var(--card-shadow);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      transition: border 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 文章列表 */
    .article-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      margin-top: 24px;
    }
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }
    .article-link-item {
      padding: 6px 14px;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.875rem;
      color: var(--primary);
      transition: all 0.2s;
    }
    .article-link-item:hover {
      background: #eef2ff;
      border-color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-col p {
      font-size: 0.9rem;
      margin-bottom: 8px;
      line-height: 1.5;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links a {
      color: #94a3b8;
      font-size: 0.9rem;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }
    .friend-links a {
      color: #cbd5e1;
      font-size: 0.85rem;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
      transition: all 0.2s;
    }
    .friend-links a:hover {
      background: var(--primary);
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 99;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 12px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.15);
      text-align: center;
      width: 130px;
    }
    .float-kefu img {
      width: 100px;
      height: 100px;
      object-fit: cover;
      margin-bottom: 6px;
      display: block;
      margin-left: auto;
      margin-right: auto;
    }
    .float-kefu span {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--text-main);
      display: block;
    }

    @media (max-width: 900px) {
      .header-inner {
        flex-direction: column;
        height: auto;
        padding: 14px 0;
        gap: 12px;
      }
      .nav-links {
        flex-wrap: wrap;
        justify-content: center;
      }
      .hero-section {
        padding: 40px 0;
      }
    }