:root {
      --primary: #10b981;
      --primary-dark: #059669;
      --primary-light: #ecfdf5;
      --primary-mint: #a7f3d0;
      --accent-mint: #34d399;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(16, 185, 129, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(16, 185, 129, 0.12), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
      --radius: 12px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      background-image: radial-gradient(at 0% 0%, rgba(167, 243, 208, 0.35) 0px, transparent 50%),
                        radial-gradient(at 100% 100%, rgba(209, 250, 229, 0.4) 0px, transparent 50%);
      background-attachment: fixed;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(16, 185, 129, 0.15);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

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

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

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

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
      transition: var(--transition);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-dark);
      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: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #10b981 0%, #059669 100%);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #059669 0%, #047857 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      border-color: var(--primary);
      color: var(--primary-dark);
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    /* Section 通用规范 */
    .section-block {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 50px;
      margin-bottom: 12px;
      border: 1px solid var(--primary-mint);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Hero 首屏 - 纯 CSS 视觉 */
    .hero-section {
      padding: 90px 0 70px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid var(--primary-mint);
      padding: 6px 16px;
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary-dark);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .hero-title span {
      color: var(--primary);
      background: linear-gradient(135deg, #059669 0%, #10b981 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .stat-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius);
      border: 1px solid rgba(16, 185, 129, 0.15);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-mint);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* 平台介绍板块 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-card-box {
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .feature-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }

    .feature-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .feature-icon {
      width: 24px;
      height: 24px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.85rem;
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* 模型矩阵徽章云 */
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .model-chip {
      background: var(--primary-light);
      color: var(--primary-dark);
      border: 1px solid var(--primary-mint);
      padding: 6px 14px;
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      transition: var(--transition);
    }

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

    /* 服务与制作场景卡片 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .card-icon-title {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .card-tag {
      font-size: 0.75rem;
      background: #f1f5f9;
      color: var(--text-light);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .service-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .card-footer-info {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      gap: 6px;
    }

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

    .process-card {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-badge {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      color: #ffffff;
      font-weight: 800;
      font-size: 1.1rem;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
    }

    .process-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .process-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 案例中心图文展示 */
    .case-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }

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

    .case-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .case-item:hover .case-img-wrap img {
      transform: scale(1.03);
    }

    .case-content {
      padding: 20px;
    }

    .case-content h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .case-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 对比评测高分板块 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #ffffff 0%, #ecfdf5 100%);
      border: 2px solid var(--primary-mint);
      border-radius: var(--radius);
      padding: 36px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      box-shadow: var(--shadow-md);
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-big {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--primary-dark);
      line-height: 1;
    }

    .score-meta h4 {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.2rem;
      margin: 4px 0;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

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

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

    .compare-table .highlight-col {
      background: rgba(236, 253, 245, 0.6);
      font-weight: 700;
      color: var(--primary-dark);
    }

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

    .review-card {
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 16px;
    }

    .author-avatar-text {
      width: 42px;
      height: 42px;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
    }

    .author-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-info p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border-radius: 10px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--primary-mint);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-main);
      user-select: none;
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      color: var(--primary-dark);
      transition: transform 0.3s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fafbfc;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 0 22px 18px 22px;
      max-height: 200px;
    }

    /* 表单与需求匹配 */
    .form-container {
      background: #ffffff;
      padding: 40px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      max-width: 800px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group-full {
      grid-column: 1 / -1;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      background: #f8fafc;
      color: var(--text-main);
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* 文章列表 */
    .articles-box {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .article-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-link-item {
      display: inline-block;
      padding: 8px 16px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 6px;
      font-size: 0.9rem;
      font-weight: 500;
      border: 1px solid var(--primary-mint);
      transition: var(--transition);
    }

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

    /* 底部通用规范 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 24px;
      margin-top: 60px;
      border-top: 3px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-links h5 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

    .footer-nav a {
      color: #94a3b8;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .footer-nav a:hover {
      color: var(--primary-mint);
    }

    .qr-card {
      background: #1e293b;
      padding: 12px;
      border-radius: 8px;
      display: inline-block;
      text-align: center;
    }

    .qr-card img {
      width: 110px;
      height: 110px;
      border-radius: 4px;
      margin-bottom: 6px;
    }

    .qr-card span {
      font-size: 0.75rem;
      color: #cbd5e1;
    }

    .friendly-links {
      border-top: 1px solid #334155;
      padding: 20px 0;
      margin-top: 20px;
      font-size: 0.85rem;
      color: #64748b;
    }

    .friendly-links strong {
      color: #cbd5e1;
      margin-right: 8px;
    }

    .friendly-links a {
      color: #94a3b8;
      margin-right: 14px;
      display: inline-block;
      transition: var(--transition);
    }

    .friendly-links a:hover {
      color: var(--primary-mint);
    }

    .copyright-bar {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 浮动工具栏 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--primary-dark);
      border: 1px solid var(--primary-mint);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-size: 1.1rem;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .cards-grid-3,
      .reviews-grid,
      .case-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-grid,
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 10px 0;
      }
      .header-actions {
        display: none;
      }
      .hero-title {
        font-size: 2rem;
      }
      .about-grid,
      .cards-grid-3,
      .reviews-grid,
      .case-gallery-grid,
      .process-grid,
      .hero-stats-grid,
      .form-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }