/* 基础复位与主题配色：春绿薄荷清新风 */
    :root {
      --primary-color: #059669;
      --primary-light: #e6f4ea;
      --primary-hover: #047857;
      --accent-color: #10b981;
      --accent-light: #d1fae5;
      --bg-color: #f4fbf7;
      --card-bg: #ffffff;
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --border-color: #a7f3d0;
      --border-light: #e5e7eb;
      --shadow-sm: 0 2px 8px rgba(5, 150, 105, 0.06);
      --shadow-md: 0 4px 20px rgba(5, 150, 105, 0.1);
      --shadow-lg: 0 10px 30px rgba(5, 150, 105, 0.15);
      --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-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-color);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background-color: var(--bg-color);
      color: var(--text-main);
      overflow-x: hidden;
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: var(--transition);
    }

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

    /* 居中主容器统一规范 */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* 全局头部与导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

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

    .brand-logo img.ai-page-logo {
      height: 40px;
      width: auto;
      max-width: 100%;
    }

    /* 明确要求：.nav-links 的 gap 属性设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

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

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

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

    .btn-nav-primary {
      background-color: var(--primary-color);
      color: #ffffff !important;
      padding: 9px 20px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 2px 6px rgba(5, 150, 105, 0.3);
    }

    .btn-nav-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }

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

    /* 首屏 Hero 区：严禁出现任何图片 */
    .hero-section {
      padding: 80px 0 60px;
      background: linear-gradient(135deg, #e6f4ea 0%, #f4fbf7 60%, #d1fae5 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--primary-color);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: #064e3b;
      margin-bottom: 20px;
      line-height: 1.3;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .btn-hero-main {
      background-color: var(--primary-color);
      color: #ffffff !important;
      font-size: 1.1rem;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: 10px;
      box-shadow: 0 4px 14px rgba(5, 150, 105, 0.4);
    }

    .btn-hero-main:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
    }

    .btn-hero-secondary {
      background-color: #ffffff;
      color: var(--primary-color) !important;
      border: 2px solid var(--primary-color);
      font-size: 1.1rem;
      font-weight: 700;
      padding: 12px 32px;
      border-radius: 10px;
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

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

    .stat-number {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-color);
    }

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

    /* 通用 Block 样式 */
    .section-block {
      padding: 70px 0;
      border-bottom: 1px solid rgba(167, 243, 208, 0.3);
    }

    .section-header {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-tag {
      color: var(--primary-color);
      font-weight: 700;
      font-size: 0.9rem;
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 8px;
      display: block;
    }

    .section-header h2 {
      font-size: 1.8rem;
      color: #064e3b;
      margin-bottom: 12px;
      font-weight: 700;
    }

    .section-header p {
      color: var(--text-muted);
      font-size: 1rem;
      max-width: 700px;
      margin: 0 auto;
    }

    /* 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: 30px;
    }

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

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

    .card-icon {
      width: 48px;
      height: 48px;
      background-color: var(--primary-light);
      color: var(--primary-color);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 16px;
    }

    .card h3 {
      font-size: 1.15rem;
      color: #064e3b;
      margin-bottom: 10px;
    }

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

    /* 自动化一站式场景卡片组 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 20px;
    }

    .scenario-item {
      background-color: #ffffff;
      border: 1px solid var(--border-light);
      border-left: 4px solid var(--primary-color);
      border-radius: 8px;
      padding: 18px;
      box-shadow: var(--shadow-sm);
    }

    .scenario-item h4 {
      font-size: 1rem;
      color: #064e3b;
      margin-bottom: 6px;
    }

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

    /* 模型标签云 */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 20px;
    }

    .model-tag {
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--primary-hover);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.88rem;
      font-weight: 500;
      box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    }

    /* 对比表格 */
    .comparison-table-wrapper {
      overflow-x: auto;
      background-color: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

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

    .comparison-table th {
      background-color: var(--primary-light);
      color: #064e3b;
      font-weight: 700;
    }

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

    .comparison-table .highlight {
      color: var(--primary-color);
      font-weight: 700;
    }

    .rating-badge {
      background-color: #ecfdf5;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: space-around;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-score {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--primary-color);
    }

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

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

    .step-number {
      width: 32px;
      height: 32px;
      background-color: var(--primary-color);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      margin-bottom: 12px;
    }

    /* 图片及案例库 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .case-img-container {
      width: 100%;
      background-color: #e5e7eb;
      overflow: hidden;
    }

    .case-img-container img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }

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

    .case-info {
      padding: 18px;
    }

    .case-info h4 {
      color: #064e3b;
      font-size: 1.05rem;
      margin-bottom: 6px;
    }

    .case-info p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 评论区 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

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

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

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background-color: var(--accent-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

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

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

    .review-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* FAQ 折叠 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

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

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      background: none;
      border: none;
      text-align: left;
      font-size: 1rem;
      font-weight: 600;
      color: #064e3b;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-answer {
      padding: 0 24px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      display: none;
    }

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

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

    .toggle-icon {
      font-size: 1.2rem;
      transition: var(--transition);
    }

    /* 表单及联系方式 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background-color: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .contact-info h3 {
      font-size: 1.4rem;
      color: #064e3b;
      margin-bottom: 16px;
    }

    .contact-list {
      list-style: none;
      margin-bottom: 24px;
    }

    .contact-list li {
      margin-bottom: 12px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .qr-box {
      margin-top: 20px;
      text-align: center;
      width: 160px;
    }

    .qr-box img {
      width: 100%;
      height: auto;
      border: 1px solid var(--border-color);
      border-radius: 8px;
    }

    .qr-box p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 6px;
    }

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-light);
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.1);
    }

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

    .btn-submit {
      width: 100%;
      background-color: var(--primary-color);
      color: #ffffff;
      border: none;
      padding: 14px;
      border-radius: 8px;
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
    }

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

    /* 资讯与友情链接 */
    .links-box {
      background-color: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      margin-top: 30px;
    }

    .links-box h4 {
      font-size: 1.05rem;
      color: #064e3b;
      margin-bottom: 12px;
    }

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

    .links-flex a {
      font-size: 0.9rem;
      background-color: var(--primary-light);
      padding: 6px 12px;
      border-radius: 6px;
    }

    /* 页脚与系统底部规范 */
    .footer {
      background-color: #064e3b;
      color: #ecfdf5;
      padding: 50px 0 30px;
      border-top: 1px solid var(--primary-hover);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }

    .footer-col p, .footer-col li {
      font-size: 0.88rem;
      color: #a7f3d0;
      line-height: 1.8;
      list-style: none;
    }

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

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

    .footer-bottom {
      border-top: 1px solid rgba(167, 243, 208, 0.2);
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: #a7f3d0;
    }

    /* 浮动客服入口与返回顶部 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background-color: var(--primary-color);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-size: 1.2rem;
      transition: var(--transition);
    }

    .float-btn:hover {
      background-color: var(--primary-hover);
      transform: scale(1.1);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-stats-grid, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .cases-grid, .reviews-grid, .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 1.6rem;
      }
      .hero-stats-grid, .grid-3, .grid-4, .grid-2, .cases-grid, .reviews-grid, .steps-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }