:root {
      --primary: #059669;
      --primary-bright: #10b981;
      --primary-light: #ecfdf5;
      --primary-dark: #047857;
      --accent: #00d084;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #f0fdf4;
      --border-color: #d1fae5;
      --border-light: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(5, 150, 105, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(5, 150, 105, 0.12), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --max-width: 1200px;
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    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;
      transition: var(--transition);
    }

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

    /* 顶部导航栏 */
    .site-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: 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;
    }

    .brand-logo-wrap {
      max-height: 42px;
      display: flex;
      align-items: center;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-text {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

    .main-nav {
      display: flex;
      align-items: center;
    }

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

    .nav-links a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.938rem;
      color: var(--text-main);
      font-weight: 500;
      border-radius: var(--radius-sm);
    }

    .nav-links a:hover {
      color: var(--primary);
      background-color: var(--primary-light);
    }

    .nav-cta-group {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-md);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-bright) 0%, var(--primary) 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.28);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #059669 0%, #047857 100%);
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(16, 185, 129, 0.38);
    }

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

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

    .mobile-menu-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 32px;
      height: 32px;
      background: transparent;
      border: none;
      cursor: pointer;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 100%;
      height: 2px;
      background-color: var(--text-main);
      transition: var(--transition);
    }

    /* 首屏 Hero 区域（严禁任何图片） */
    .hero-section {
      background: linear-gradient(180deg, #ecfdf5 0%, #f8fafc 100%);
      padding: 64px 0 54px;
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 9999px;
      color: var(--primary-dark);
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 20px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary-bright);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary-bright);
    }

    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 18px;
    }

    .hero-title span {
      color: var(--primary);
      position: relative;
    }

    .hero-desc {
      font-size: 1.125rem;
      color: var(--text-muted);
      margin-bottom: 30px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-bottom: 42px;
      flex-wrap: wrap;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .metric-card {
      background: #ffffff;
      padding: 18px 14px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .metric-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-bright);
    }

    .metric-num {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary);
      display: block;
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 模块通用样式 */
    .section {
      padding: 68px 0;
      border-bottom: 1px solid var(--border-light);
    }

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

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 44px;
    }

    .section-subtitle {
      display: inline-block;
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 1.875rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-lead {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
      align-items: center;
    }

    .card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 24px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .card:hover {
      border-color: var(--primary-bright);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .card-icon-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: var(--radius-md);
      font-weight: 700;
      font-size: 1.125rem;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 1.18rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型矩阵标签云 */
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-size: 0.875rem;
      font-weight: 600;
      border-radius: 9999px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .model-tag:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 流程步骤 */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 800;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 10px;
      border-radius: 9999px;
      margin-bottom: 12px;
    }

    /* 评测与对比表格 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #ecfdf5 0%, #ffffff 100%);
      border: 2px solid var(--primary-bright);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
    }

    .eval-score-area {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .score-circle {
      width: 88px;
      height: 88px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      box-shadow: 0 4px 14px rgba(5, 150, 105, 0.35);
    }

    .score-num {
      font-size: 1.75rem;
      line-height: 1;
    }

    .score-max {
      font-size: 0.75rem;
      opacity: 0.9;
    }

    .eval-text h3 {
      font-size: 1.35rem;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 1.15rem;
      margin-bottom: 6px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

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

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

    .custom-table tr:hover td {
      background-color: #f0fdf4;
    }

    .tag-badge {
      display: inline-block;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 600;
    }

    .tag-success {
      background: var(--primary-light);
      color: var(--primary-dark);
    }

    .tag-muted {
      background: #f1f5f9;
      color: #64748b;
    }

    /* 素材图片展示区 */
    .media-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

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

    .media-img-wrap {
      width: 100%;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-card .ai-page-image, 
    .media-card img {
      width: 100%;
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .media-info {
      padding: 16px;
    }

    .media-info h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .media-info p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 折叠面板 FAQ */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: var(--primary);
    }

    .faq-question {
      padding: 18px 24px;
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: transparent;
      border: none;
      cursor: pointer;
      text-align: left;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .faq-toggle-icon {
      font-size: 1.25rem;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background-color: #fcfdfd;
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      border-top-color: var(--border-light);
    }

    .faq-answer-inner {
      padding: 16px 24px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.7;
    }

    /* 客户评价网格 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      padding: 22px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.05rem;
    }

    .review-user-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .review-user-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .review-content {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 表单与需求匹配 */
    .form-wrapper-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: var(--shadow-md);
      max-width: 820px;
      margin: 0 auto;
    }

    .custom-form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }

    .form-col-full {
      grid-column: span 2;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-label {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid #cbd5e1;
      font-size: 0.92rem;
      font-family: inherit;
      color: var(--text-main);
      background: #ffffff;
      transition: var(--transition);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--primary-bright);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

    /* 文章外链与列表 */
    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 18px;
    }

    .article-link-item {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      color: var(--primary-dark);
      font-weight: 500;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .article-link-item:hover {
      background: var(--primary-light);
      border-color: var(--primary);
    }

    /* 浮动客服入口 */
    .floating-contact-box {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.35);
      cursor: pointer;
      font-size: 0.85rem;
      font-weight: 700;
      border: none;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary-dark);
      transform: scale(1.05);
    }

    .float-qr-popup {
      display: none;
      position: absolute;
      bottom: 60px;
      right: 0;
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 180px;
      text-align: center;
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-sm);
    }

    .float-qr-popup span {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-top: 6px;
      display: block;
    }

    .floating-contact-box:hover .float-qr-popup {
      display: block;
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 24px;
      color: var(--text-main);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

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

    .footer-links-list a {
      color: var(--text-muted);
      font-size: 0.88rem;
    }

    .footer-links-list a:hover {
      color: var(--primary);
    }

    .footer-qr-col {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }

    .footer-qr-img-box {
      width: 110px;
      height: 110px;
      border: 1px solid var(--border-color);
      padding: 6px;
      background: #ffffff;
      border-radius: var(--radius-sm);
    }

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

    .friendship-links-area {
      padding-top: 24px;
      margin-top: 24px;
      border-top: 1px solid var(--border-light);
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      font-size: 0.86rem;
      color: var(--text-muted);
    }

    .friendship-links-area a {
      color: var(--primary-dark);
      font-weight: 500;
    }

    .footer-bottom-bar {
      padding-top: 20px;
      margin-top: 20px;
      border-top: 1px solid var(--border-light);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.84rem;
      color: var(--text-light);
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 响应式样式适配 */
    @media (max-width: 992px) {
      .grid-4, .steps-wrapper {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .reviews-grid, .media-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-2, .grid-3, .grid-4, .reviews-grid, .steps-wrapper, .media-gallery-grid {
        grid-template-columns: 1fr;
      }
      .custom-form-grid {
        grid-template-columns: 1fr;
      }
      .form-col-full {
        grid-column: span 1;
      }
      .mobile-menu-toggle {
        display: flex;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 12px 16px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom-bar {
        flex-direction: column;
        text-align: center;
      }
    }