/* 基础重置与春绿薄荷清新风变量定义 */
    :root {
      --mint-primary: #059669;
      --mint-primary-hover: #047857;
      --mint-light: #ecfdf5;
      --mint-subtle: #d1fae5;
      --mint-border: #a7f3d0;
      --text-dark: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-white: #ffffff;
      --bg-gradient: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 50%, #f7fee7 100%);
      --shadow-sm: 0 2px 4px rgba(5, 150, 105, 0.05);
      --shadow-md: 0 6px 16px rgba(5, 150, 105, 0.08);
      --shadow-lg: 0 12px 32px rgba(5, 150, 105, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
    }

    * {
      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;
      background-color: #f8fafc;
      color: var(--text-dark);
      line-height: 1.6;
    }

    body {
      background: var(--bg-gradient);
      min-height: 100vh;
      overflow-x: hidden;
    }

    a {
      color: var(--mint-primary);
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    /* 统一全局居中主容器 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 头部导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--mint-border);
      box-shadow: var(--shadow-sm);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

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

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* 严格遵照提示要求设为0 */
      list-style: none;
    }

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

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

    .header-cta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
    }

    .btn-primary {
      background-color: var(--mint-primary);
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--mint-primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(5, 150, 105, 0.35);
    }

    .btn-outline {
      border-color: var(--mint-border);
      color: var(--mint-primary);
      background-color: var(--bg-white);
    }

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

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .menu-toggle span {
      width: 24px;
      height: 2px;
      background-color: var(--text-dark);
      transition: 0.3s;
    }

    /* 首屏 HERO 区域 - 绝对不包含图片 */
    .hero-section {
      padding: 80px 0 60px 0;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background-color: var(--mint-subtle);
      border: 1px solid var(--mint-border);
      border-radius: 50px;
      color: var(--mint-primary-hover);
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title-h1 {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-dark);
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 840px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

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

    .hero-features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      margin-top: 40px;
    }

    .hero-feature-card {
      background: var(--bg-white);
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--mint-border);
      box-shadow: var(--shadow-sm);
      text-align: left;
      transition: transform 0.25s ease;
    }

    .hero-feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .hero-feature-card h4 {
      font-size: 1.05rem;
      color: var(--mint-primary-hover);
      margin-bottom: 6px;
    }

    .hero-feature-card p {
      font-size: 0.88rem;
      color: var(--text-light);
    }

    /* 通用 Section 样式 */
    .section-padding {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px auto;
    }

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--mint-primary);
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 1.85rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 14px;
    }

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

    /* 通用卡片容器 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .card {
      background-color: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid rgba(5, 150, 105, 0.12);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

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

    /* 关于我们 / 平台介绍 */
    .about-box {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--mint-border);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .platform-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .tag-chip {
      padding: 6px 14px;
      background: var(--mint-light);
      border: 1px solid var(--mint-border);
      border-radius: 20px;
      font-size: 0.85rem;
      color: var(--mint-primary-hover);
      font-weight: 500;
    }

    /* 场景卡片 */
    .scenario-icon {
      width: 44px;
      height: 44px;
      background: var(--mint-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--mint-primary);
      font-weight: bold;
      margin-bottom: 16px;
      font-size: 1.1rem;
    }

    .card h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

    .card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      flex-grow: 1;
    }

    /* 流程步骤 */
    .steps-container {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .step-card {
      background: var(--bg-white);
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--mint-border);
      position: relative;
    }

    .step-number {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--mint-border);
      margin-bottom: 8px;
    }

    /* 对比表格 */
    .table-wrapper {
      overflow-x: auto;
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--mint-border);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
    }

    .compare-table th {
      background: var(--mint-light);
      color: var(--text-dark);
      font-weight: 700;
    }

    .compare-table tr:hover {
      background-color: #fafafa;
    }

    .compare-score-banner {
      background: linear-gradient(135deg, var(--mint-primary), #047857);
      color: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-title {
      font-size: 1.4rem;
      font-weight: 700;
    }

    .score-stars {
      font-size: 1.6rem;
      color: #fde047;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--mint-border);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question:hover {
      background-color: var(--mint-light);
    }

    .faq-answer {
      padding: 0 24px 18px 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      display: none;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s;
    }

    .faq-item.open .faq-icon {
      transform: rotate(180deg);
    }

    /* 客户评论 */
    .review-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--mint-border);
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--mint-subtle);
      color: var(--mint-primary-hover);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .reviewer-info h4 {
      font-size: 1rem;
      color: var(--text-dark);
    }

    .reviewer-info p {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* 媒体资源展示区域 */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
      margin-top: 24px;
    }

    .media-card img {
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--mint-border);
    }

    /* 文章列表 */
    .article-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item {
      background: var(--bg-white);
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(5, 150, 105, 0.15);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* 表单与联系 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--mint-border);
      box-shadow: var(--shadow-md);
    }

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

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--mint-primary);
      box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.15);
    }

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

    .qr-box {
      text-align: center;
      padding: 20px;
      background: var(--mint-light);
      border-radius: var(--radius-md);
      border: 1px solid var(--mint-border);
    }

    .qr-box img {
      max-width: 180px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
    }

    /* 页脚与友情链接 */
    .footer {
      background-color: #064e3b;
      color: #ecfdf5;
      padding: 50px 0 24px 0;
      margin-top: 60px;
    }

    .footer-content {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 32px;
      margin-bottom: 40px;
    }

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

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

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

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

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links a {
      color: #a7f3d0;
      font-size: 0.9rem;
      background: rgba(255, 255, 255, 0.08);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
    }

    .friend-links a:hover {
      color: #ffffff;
      background: rgba(255, 255, 255, 0.15);
    }

    .footer-bottom {
      border-top: 1px solid rgba(167, 243, 208, 0.2);
      padding-top: 20px;
      text-align: center;
      font-size: 0.88rem;
      color: #a7f3d0;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--mint-primary);
      color: #ffffff;
      padding: 12px 18px;
      border-radius: 30px;
      box-shadow: 0 8px 24px rgba(5, 150, 105, 0.4);
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      font-weight: 600;
      font-size: 0.9rem;
    }

    .float-kefu:hover {
      background: var(--mint-primary-hover);
    }

    /* 响应式适配 */
    @media (max-width: 900px) {
      .header-inner {
        height: 64px;
      }
      .nav-wrapper {
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--mint-border);
        flex-direction: column;
        padding: 20px;
        display: none;
        box-shadow: var(--shadow-md);
      }
      .nav-wrapper.show {
        display: flex;
      }
      .nav-links {
        flex-direction: column;
        width: 100%;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .header-cta {
        margin-left: 0;
        margin-top: 12px;
        width: 100%;
        justify-content: center;
      }
      .menu-toggle {
        display: flex;
      }
      .contact-container {
        grid-template-columns: 1fr;
      }
      .hero-title-h1 {
        font-size: 1.65rem;
      }
    }