:root {
      --primary: #10b981;
      --primary-dark: #059669;
      --primary-light: #ecfdf5;
      --accent: #14b8a6;
      --text-dark: #0f172a;
      --text-muted: #475569;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 8px rgba(16, 185, 129, 0.06);
      --shadow-md: 0 8px 24px rgba(16, 185, 129, 0.1);
      --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.08);
      --radius: 12px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-dark);
      background-color: var(--bg-page);
    }

    body {
      line-height: 1.6;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    a:hover {
      color: var(--primary);
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .brand-logo img {
      height: 40px;
      width: auto;
      display: block;
    }

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

    .nav-links li a {
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
      transition: all 0.2s ease;
      display: inline-block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, #10b981 0%, #059669 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
    }

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

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

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-dark);
      padding: 4px;
    }

    /* 主题首屏 (Hero - 纯色/几何/代码动效，无图片) */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, #d1fae5 0%, #f0fdf4 40%, #ffffff 80%);
      padding: 70px 0 50px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-content {
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
    }

    .badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: #ecfdf5;
      border: 1px solid #a7f3d0;
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 38px;
      font-weight: 800;
      color: #064e3b;
      line-height: 1.25;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 30px;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .hero-btn-main {
      padding: 14px 34px;
      font-size: 17px;
    }

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

    .stat-card {
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid #d1fae5;
      padding: 20px 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }

    .stat-num {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary-dark);
      display: block;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用Section */
    .section-py {
      padding: 64px 0;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 44px auto;
    }

    .section-eyebrow {
      color: var(--primary-dark);
      font-size: 14px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: #064e3b;
      margin-bottom: 12px;
    }

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

    /* 网格与卡片 */
    .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: 24px;
    }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #a7f3d0;
    }

    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: #064e3b;
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 模型支持标签云 */
    .model-tags-wrap {
      background: #ffffff;
      border: 1px solid #d1fae5;
      padding: 30px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }

    .tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 15px;
    }

    .tag-item {
      padding: 6px 14px;
      background: #f0fdf4;
      border: 1px solid #bbf7d0;
      color: #166534;
      font-size: 13px;
      font-weight: 600;
      border-radius: 6px;
      transition: all 0.2s ease;
    }

    .tag-item:hover {
      background: #10b981;
      color: #ffffff;
      border-color: #10b981;
    }

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

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

    .step-badge {
      display: inline-block;
      width: 32px;
      height: 32px;
      line-height: 32px;
      text-align: center;
      background: #10b981;
      color: #ffffff;
      font-weight: 700;
      border-radius: 50%;
      margin-bottom: 14px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      color: #064e3b;
      margin-bottom: 8px;
    }

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

    /* 对比表格 */
    .table-container {
      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;
      font-size: 14px;
    }

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

    .compare-table th {
      background: #f0fdf4;
      color: #064e3b;
      font-weight: 700;
    }

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

    .highlight-col {
      background: #f0fdf4;
      font-weight: 600;
      color: #047857;
    }

    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      background: #fef3c7;
      color: #92400e;
      padding: 4px 10px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 13px;
    }

    /* 素材展示区 (正文图片) */
    .media-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
      align-items: stretch;
    }

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

    .media-item img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .media-info {
      padding: 16px;
    }

    .media-info h4 {
      font-size: 16px;
      color: #064e3b;
      margin-bottom: 4px;
    }

    .media-info p {
      font-size: 13px;
      color: var(--text-muted);
    }

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

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.6;
      margin-bottom: 16px;
      position: relative;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 10px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .review-avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: #10b981;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .review-meta h5 {
      font-size: 14px;
      color: var(--text-dark);
    }

    .review-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 文章与百科列表 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: all 0.2s ease;
    }

    .article-item:hover {
      border-color: #10b981;
      transform: translateX(4px);
    }

    .article-item a {
      font-size: 15px;
      font-weight: 600;
      color: #1e293b;
    }

    .article-item span {
      font-size: 13px;
      color: #10b981;
      font-weight: 500;
    }

    /* FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-question {
      padding: 16px 20px;
      font-size: 16px;
      font-weight: 600;
      color: #064e3b;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #ffffff;
      transition: background 0.2s ease;
    }

    .faq-question:hover {
      background: #f0fdf4;
    }

    .faq-toggle {
      font-size: 18px;
      color: #10b981;
      transition: transform 0.25s ease;
    }

    .faq-answer {
      padding: 0 20px 16px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      display: none;
      border-top: 1px dashed #e2e8f0;
      margin-top: 8px;
      padding-top: 12px;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

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

    /* 表单与联系区 */
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      outline: none;
      transition: border-color 0.2s ease;
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

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

    .contact-info-card {
      background: linear-gradient(135deg, #064e3b 0%, #022c22 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 36px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-info-list {
      list-style: none;
      margin: 20px 0;
    }

    .contact-info-list li {
      margin-bottom: 14px;
      font-size: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .qr-container {
      background: #ffffff;
      padding: 12px;
      border-radius: 8px;
      width: fit-content;
      margin-top: 10px;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .qr-container img {
      width: 90px;
      height: 90px;
      display: block;
    }

    .qr-container p {
      color: #0f172a;
      font-size: 12px;
      font-weight: 600;
      line-height: 1.4;
    }

    /* 友情链接与页脚 */
    .links-section {
      background: #ffffff;
      padding: 30px 0;
      border-top: 1px solid var(--border-color);
    }

    .links-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .links-container {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .links-container a {
      font-size: 13px;
      color: var(--text-muted);
      padding: 4px 10px;
      background: #f1f5f9;
      border-radius: 4px;
      transition: all 0.2s ease;
    }

    .links-container a:hover {
      background: #e2e8f0;
      color: var(--primary-dark);
    }

    footer.site-footer {
      background: #064e3b;
      color: #ecfdf5;
      padding: 36px 0;
      border-top: 1px solid #047857;
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }

    .footer-links {
      display: flex;
      gap: 18px;
    }

    .footer-links a {
      color: #a7f3d0;
    }

    .footer-links a:hover {
      color: #ffffff;
    }

    /* 悬浮客服 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      background: #10b981;
      color: #ffffff;
      padding: 12px 18px;
      border-radius: 30px;
      box-shadow: 0 8px 24px rgba(16, 185, 129, 0.4);
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      font-weight: 600;
      font-size: 14px;
      transition: all 0.25s ease;
    }

    .floating-contact:hover {
      transform: translateY(-3px);
      background: #059669;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .grid-3, .step-list, .hero-grid-stats, .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-2, .media-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 12px;
      }
      .hero-title {
        font-size: 28px;
      }
      .grid-3, .grid-4, .hero-grid-stats, .step-list, .article-list, .review-grid {
        grid-template-columns: 1fr;
      }
      .footer-inner {
        flex-direction: column;
        text-align: center;
      }
    }