/* ---------- 全局重置 ---------- */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

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

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
      background-color: #f7fbf7;
      color: #1a2e1a;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    /* 统一的容器宽度体系 */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* 链接与按钮基础 */
    a {
      text-decoration: none;
      color: inherit;
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    /* ---------- 色彩变量 ---------- */
    :root {
      --green-primary: #1f7a3b;
      --green-bright: #2ecc71;
      --green-soft: #d4f5e2;
      --green-deep: #0e3d1e;
      --gray-bg: #f7fbf7;
      --text-dark: #132713;
      --text-mid: #2d4a2d;
      --text-light: #4d6b4d;
      --white: #ffffff;
      --border-light: #e2efe2;
      --shadow-sm: 0 4px 12px rgba(0, 30, 0, 0.04);
      --shadow-md: 0 12px 28px rgba(0, 40, 0, 0.08);
      --radius-card: 20px;
      --radius-btn: 40px;
    }

    /* ---------- 导航栏 ---------- */
    .site-header {
      background-color: var(--white);
      box-shadow: 0 2px 12px rgba(0, 40, 0, 0.04);
      position: sticky;
      top: 0;
      z-index: 100;
      border-bottom: 1px solid var(--border-light);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 72px;
      gap: 16px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-shrink: 0;
    }

    .ai-page-logo {
      display: block;
      width: 120px;
      height: auto;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* 按要求设置 gap 为 0 */
      list-style: none;
      flex-wrap: wrap;
    }

    .nav-links li {
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      display: block;
      padding: 10px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-dark);
      border-radius: 8px;
      transition: background 0.2s ease, color 0.2s ease;
      white-space: nowrap;
    }

    .nav-links a:hover,
    .nav-links a:focus {
      background-color: var(--green-soft);
      color: var(--green-deep);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.95rem;
      transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
      border: 1.5px solid transparent;
      line-height: 1.4;
      text-align: center;
    }

    .btn-primary {
      background-color: var(--green-primary);
      color: var(--white);
      border-color: var(--green-primary);
      box-shadow: 0 6px 14px rgba(31, 122, 59, 0.2);
    }

    .btn-primary:hover {
      background-color: #18642f;
      border-color: #18642f;
      box-shadow: 0 8px 18px rgba(31, 122, 59, 0.3);
      transform: translateY(-1px);
    }

    .btn-primary:active {
      transform: translateY(1px);
      box-shadow: 0 4px 8px rgba(31, 122, 59, 0.2);
    }

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

    .btn-outline:hover {
      background-color: var(--green-soft);
      border-color: var(--green-primary);
      transform: translateY(-1px);
    }

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

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2.5px;
      background-color: var(--text-dark);
      border-radius: 4px;
      transition: all 0.2s ease;
    }

    /* ---------- 主内容区 ---------- */
    main {
      display: block;
    }

    /* 统一个主section间距 */
    .section {
      padding: 72px 0;
      background-color: var(--gray-bg);
    }

    .section:nth-child(even) {
      background-color: var(--white);
    }

    .section-header {
      text-align: center;
      max-width: 750px;
      margin: 0 auto 48px;
    }

    .section-label {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--green-primary);
      background-color: var(--green-soft);
      padding: 6px 16px;
      border-radius: 40px;
      margin-bottom: 16px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      line-height: 1.3;
      color: var(--text-dark);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1.1rem;
      color: var(--text-light);
      line-height: 1.7;
    }

    /* ---------- Hero 首屏 (无图片) ---------- */
    .hero {
      background: linear-gradient(145deg, #f0faf2 0%, #e1f5e8 100%);
      padding: 80px 0 96px;
      position: relative;
      overflow: hidden;
    }

    /* 装饰几何元素 — 纯CSS，不是图片 */
    .hero::before {
      content: '';
      position: absolute;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(46, 204, 113, 0.08) 0%, transparent 70%);
      border-radius: 50%;
      top: -200px;
      right: -100px;
      pointer-events: none;
      z-index: 0;
    }

    .hero::after {
      content: '';
      position: absolute;
      width: 350px;
      height: 350px;
      background: radial-gradient(circle, rgba(31, 122, 59, 0.06) 0%, transparent 70%);
      border-radius: 50%;
      bottom: -100px;
      left: -80px;
      pointer-events: none;
      z-index: 0;
    }

    .hero .container {
      position: relative;
      z-index: 1;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.2;
      color: var(--green-deep);
      margin-bottom: 24px;
      letter-spacing: -0.02em;
    }

    .hero-highlight {
      color: var(--green-primary);
      position: relative;
      display: inline-block;
    }

    .hero-highlight::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 4px;
      width: 100%;
      height: 8px;
      background-color: rgba(46, 204, 113, 0.25);
      border-radius: 4px;
      z-index: -1;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-mid);
      margin-bottom: 32px;
      line-height: 1.7;
      max-width: 480px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 32px;
    }

    .hero-actions .btn {
      padding: 14px 32px;
      font-size: 1.05rem;
    }

    .hero-stats-mini {
      display: flex;
      gap: 32px;
      margin-top: 32px;
    }

    .stat-mini {
      display: flex;
      flex-direction: column;
    }

    .stat-mini strong {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--green-deep);
      line-height: 1.3;
    }

    .stat-mini span {
      font-size: 0.9rem;
      color: var(--text-light);
    }

    /* 右侧数据卡片区域 (纯CSS美化) */
    .hero-visual {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .visual-card {
      background-color: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(4px);
      border: 1px solid rgba(255, 255, 255, 0.9);
      border-radius: var(--radius-card);
      padding: 24px 28px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

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

    .visual-card-icon {
      width: 40px;
      height: 40px;
      background-color: var(--green-soft);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      color: var(--green-primary);
      flex-shrink: 0;
    }

    .visual-card h3 {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--text-dark);
    }

    .visual-card p {
      font-size: 0.95rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }

    .tag {
      background-color: var(--white);
      border: 1px solid var(--border-light);
      padding: 6px 14px;
      border-radius: 40px;
      font-size: 0.85rem;
      color: var(--text-mid);
      font-weight: 500;
      transition: background 0.2s ease, border-color 0.2s ease;
    }

    .tag:hover {
      background-color: var(--green-soft);
      border-color: var(--green-primary);
    }

    /* ---------- 数据指标卡片 ---------- */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .metric-card {
      background-color: var(--white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .metric-number {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--green-primary);
      line-height: 1.2;
      margin-bottom: 8px;
    }

    .metric-label {
      font-size: 1rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* ---------- 服务能力卡片 ---------- */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .service-card {
      background-color: var(--white);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
    }

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

    .service-icon {
      font-size: 2rem;
      margin-bottom: 16px;
      display: inline-block;
    }

    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--text-dark);
    }

    .service-card p {
      font-size: 0.98rem;
      color: var(--text-light);
      line-height: 1.7;
      flex: 1;
    }

    /* ---------- 流程步骤 ---------- */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step;
    }

    .step-card {
      background-color: var(--white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      position: relative;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      counter-increment: step;
    }

    .step-card::before {
      content: counter(step, decimal-leading-zero);
      display: block;
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--green-soft);
      line-height: 1;
      margin-bottom: 16px;
    }

    .step-card h3 {
      font-size: 1.1rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-dark);
    }

    .step-card p {
      font-size: 0.95rem;
      color: var(--text-light);
      line-height: 1.6;
    }

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

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

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 700px;
      font-size: 0.98rem;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 18px 24px;
      text-align: left;
      border-bottom: 1px solid var(--border-light);
    }

    .comparison-table th {
      background-color: #f2faf4;
      font-weight: 600;
      color: var(--green-deep);
    }

    .comparison-table td:first-child {
      font-weight: 600;
      color: var(--text-dark);
    }

    .comparison-table .highlight-row {
      background-color: #f0fdf4;
    }

    .rating-stars {
      color: #f5b342;
      letter-spacing: 2px;
      font-size: 1.1rem;
    }

    .score-badge {
      display: inline-block;
      background-color: var(--green-primary);
      color: var(--white);
      font-weight: 700;
      padding: 2px 12px;
      border-radius: 20px;
      font-size: 0.9rem;
    }

    /* ---------- 案例展示 ---------- */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background-color: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .case-image-wrapper {
      width: 100%;
      aspect-ratio: 4 / 3;
      overflow: hidden;
      background-color: var(--green-soft);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-image-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    /* 如果不使用真实图片，纯色占位已经用背景色 */
    .case-info {
      padding: 20px 24px 24px;
    }

    .case-info h3 {
      font-size: 1.1rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-dark);
    }

    .case-info p {
      font-size: 0.95rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* ---------- FAQ 折叠面板 ---------- */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background-color: var(--white);
      border-radius: 16px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: box-shadow 0.2s ease;
    }

    .faq-item:hover {
      box-shadow: 0 6px 16px rgba(0, 40, 0, 0.06);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-dark);
      text-align: left;
      background: none;
      border: none;
      cursor: pointer;
      transition: background 0.2s ease;
    }

    .faq-question:hover {
      background-color: #f7fbf7;
    }

    .faq-icon {
      font-size: 1.3rem;
      font-weight: 400;
      color: var(--green-primary);
      transition: transform 0.25s ease;
      flex-shrink: 0;
      margin-left: 16px;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.25s ease;
      padding: 0 24px;
      color: var(--text-light);
      line-height: 1.7;
      font-size: 0.98rem;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 24px;
    }

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

    .review-card {
      background-color: var(--white);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
    }

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

    .review-stars {
      color: #f5b342;
      font-size: 1rem;
      letter-spacing: 2px;
      margin-bottom: 12px;
    }

    .review-text {
      font-size: 0.98rem;
      color: var(--text-mid);
      line-height: 1.7;
      flex: 1;
      margin-bottom: 16px;
    }

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

    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background-color: var(--green-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--green-deep);
      font-size: 1.1rem;
      flex-shrink: 0;
    }

    .review-name {
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-dark);
    }

    .review-role {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* ---------- 表单区域 ---------- */
    .form-section {
      background-color: var(--green-soft);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: start;
    }

    .form-info h2 {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--green-deep);
    }

    .form-info p {
      font-size: 1.05rem;
      color: var(--text-mid);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .form-info .tag-cloud {
      margin-top: 16px;
    }

    .contact-form {
      background-color: var(--white);
      border-radius: var(--radius-card);
      padding: 36px 32px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

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

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: 12px;
      border: 1.5px solid var(--border-light);
      font-size: 0.98rem;
      font-family: inherit;
      color: var(--text-dark);
      background-color: #fafdfa;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--green-primary);
      box-shadow: 0 0 0 3px rgba(31, 122, 59, 0.15);
    }

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

    .form-submit {
      width: 100%;
      padding: 14px;
      font-size: 1.05rem;
    }

    /* ---------- 页脚 ---------- */
    .site-footer {
      background-color: var(--white);
      border-top: 1px solid var(--border-light);
      padding: 56px 0 24px;
      color: var(--text-dark);
    }

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

    .footer-brand .ai-page-logo {
      width: 140px;
      margin-bottom: 16px;
    }

    .footer-brand p {
      font-size: 0.95rem;
      color: var(--text-light);
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-brand .contact-item {
      font-size: 0.9rem;
      color: var(--text-mid);
      margin-bottom: 6px;
    }

    .footer-links h3 {
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text-dark);
    }

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

    .footer-links a {
      font-size: 0.92rem;
      color: var(--text-light);
      transition: color 0.2s ease;
    }

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

    .footer-qr {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
    }

    .footer-qr img {
      width: 100px;
      height: auto;
      border-radius: 12px;
      border: 1px solid var(--border-light);
      margin-bottom: 10px;
    }

    .footer-qr p {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-light);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    .footer-bottom a {
      color: var(--green-primary);
      font-weight: 500;
    }

    /* ---------- 浮动客服 ---------- */
    .floating-contact {
      position: fixed;
      bottom: 24px;
      right: 24px;
      z-index: 200;
      display: flex;
      flex-direction: column;
      gap: 12px;
      align-items: flex-end;
    }

    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background-color: var(--green-primary);
      color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      box-shadow: 0 8px 20px rgba(31, 122, 59, 0.35);
      transition: transform 0.2s ease, background 0.2s ease;
      cursor: pointer;
      border: none;
    }

    .float-btn:hover {
      background-color: #18642f;
      transform: scale(1.06);
    }

    .back-to-top {
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .back-to-top.visible {
      opacity: 1;
      visibility: visible;
    }

    /* ---------- 文章列表 ---------- */
    .article-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .article-card {
      background-color: var(--white);
      border-radius: var(--radius-card);
      padding: 24px 28px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .article-card .meta {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-bottom: 8px;
    }

    .article-card h3 {
      font-size: 1.1rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-dark);
      line-height: 1.4;
    }

    .article-card p {
      font-size: 0.95rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    .article-card .read-more {
      display: inline-block;
      margin-top: 12px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--green-primary);
    }

    /* ---------- 响应式 ---------- */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .hero-content h1 {
        font-size: 2.6rem;
      }

      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .case-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }

      .form-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        padding: 12px 0;
        gap: 4px;
        border-top: 1px solid var(--border-light);
        margin-top: 8px;
      }

      .nav-links.open {
        display: flex;
      }

      .nav-links a {
        width: 100%;
        padding: 12px 16px;
      }

      .nav-container {
        flex-wrap: wrap;
      }

      .menu-toggle {
        display: flex;
      }

      .nav-actions .btn {
        padding: 8px 18px;
        font-size: 0.9rem;
      }

      .hero-content h1 {
        font-size: 2.1rem;
      }

      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }

      .hero-actions .btn {
        justify-content: center;
      }

      .hero-stats-mini {
        flex-wrap: wrap;
        gap: 20px;
      }

      .metrics-grid {
        grid-template-columns: 1fr;
      }

      .services-grid {
        grid-template-columns: 1fr;
      }

      .steps-grid {
        grid-template-columns: 1fr;
      }

      .case-grid {
        grid-template-columns: 1fr;
      }

      .reviews-grid {
        grid-template-columns: 1fr;
      }

      .article-list {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }

      .section {
        padding: 52px 0;
      }

      .section-title {
        font-size: 1.8rem;
      }

      .contact-form {
        padding: 24px 20px;
      }

      .comparison-table th,
      .comparison-table td {
        padding: 14px 16px;
        font-size: 0.9rem;
      }

      .floating-contact {
        bottom: 16px;
        right: 16px;
      }

      .float-btn {
        width: 46px;
        height: 46px;
        font-size: 1.2rem;
      }
    }

    /* 滚动渐入动画 */
    .fade-in {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }