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

    :root {
      --mint: #e6f7f0;
      --mint-soft: #f0faf5;
      --mint-deep: #b8e6d4;
      --green: #1f7a6a;
      --green-dark: #115e51;
      --green-light: #3aa895;
      --text-dark: #1e2b28;
      --text-mid: #3c5a52;
      --text-soft: #5e7a71;
      --white: #ffffff;
      --card-bg: #ffffff;
      --border-light: #d4ede4;
      --shadow-sm: 0 8px 24px rgba(31, 122, 106, 0.08);
      --shadow-md: 0 16px 40px rgba(31, 122, 106, 0.10);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 10px;
      --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font);
      color: var(--text-dark);
      background: linear-gradient(145deg, #f2fbf6 0%, #e6f7ef 40%, #f0faf5 100%);
      line-height: 1.6;
      font-size: 16px;
      min-height: 100vh;
      overflow-x: hidden;
    }

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

    a {
      text-decoration: none;
      color: var(--green);
      transition: color 0.2s ease;
    }

    a:hover {
      color: var(--green-dark);
    }

    ul {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ---------- 顶部导航 ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(184, 230, 212, 0.6);
      box-shadow: 0 1px 0 rgba(255,255,255,0.6) inset;
    }

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

    .brand-link {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-mid);
      border-radius: 40px;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .nav-links a:hover {
      background: var(--mint-deep);
      color: var(--green-dark);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 40px;
      border: 1.5px solid var(--green);
      color: var(--green);
      background: transparent;
      transition: all 0.2s ease;
      cursor: pointer;
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-outline:hover {
      background: var(--green);
      color: #fff;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 60px;
      border: none;
      background: var(--green);
      color: #fff;
      transition: all 0.25s ease;
      cursor: pointer;
      line-height: 1.4;
      box-shadow: 0 8px 20px rgba(31, 122, 106, 0.25);
      white-space: nowrap;
    }

    .btn-primary:hover {
      background: var(--green-dark);
      transform: translateY(-2px);
      box-shadow: 0 14px 28px rgba(31, 122, 106, 0.30);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 26px;
      cursor: pointer;
      color: var(--green-dark);
      padding: 4px;
      line-height: 1;
    }

    /* ---------- Hero（首屏无图片） ---------- */
    .hero {
      padding: 64px 0 48px;
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      width: 520px;
      height: 520px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(58, 168, 149, 0.12) 0%, transparent 70%);
      top: -120px;
      right: -120px;
      pointer-events: none;
    }

    .hero::after {
      content: '';
      position: absolute;
      width: 360px;
      height: 360px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(184, 230, 212, 0.25) 0%, transparent 70%);
      bottom: -100px;
      left: -80px;
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 24px;
    }

    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.7);
      border: 1px solid var(--mint-deep);
      border-radius: 60px;
      padding: 6px 18px 6px 12px;
      font-size: 13px;
      font-weight: 500;
      color: var(--green-dark);
      backdrop-filter: blur(4px);
    }

    .hero-eyebrow span {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--green-light);
      display: inline-block;
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.6; transform: scale(1.15); }
    }

    .hero h1 {
      font-size: clamp(28px, 5vw, 48px);
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.02em;
      color: var(--text-dark);
      max-width: 900px;
    }

    .hero h1 em {
      font-style: normal;
      color: var(--green);
      position: relative;
    }

    .hero-desc {
      font-size: clamp(15px, 1.6vw, 18px);
      color: var(--text-soft);
      max-width: 680px;
      line-height: 1.7;
      margin: 0 auto;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      margin-top: 8px;
    }

    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      margin-top: 16px;
      width: 100%;
    }

    .stat-card {
      background: rgba(255, 255, 255, 0.78);
      backdrop-filter: blur(6px);
      border: 1px solid rgba(255, 255, 255, 0.9);
      padding: 16px 28px;
      border-radius: 60px;
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-mid);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .stat-card strong {
      font-size: 22px;
      font-weight: 700;
      color: var(--green-dark);
      letter-spacing: -0.01em;
    }

    /* ---------- 通用区块 ---------- */
    .section {
      padding: 64px 0;
    }

    .section-header {
      margin-bottom: 40px;
      max-width: 720px;
    }

    .section-header.centered {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-label {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--green);
      background: rgba(184, 230, 212, 0.35);
      padding: 4px 14px;
      border-radius: 40px;
      margin-bottom: 12px;
    }

    .section-header h2 {
      font-size: clamp(24px, 3.4vw, 36px);
      font-weight: 700;
      line-height: 1.25;
      color: var(--text-dark);
      margin-bottom: 12px;
    }

    .section-header p {
      color: var(--text-soft);
      font-size: 16px;
      line-height: 1.7;
    }

    /* ---------- 服务卡片 ---------- */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      background: linear-gradient(135deg, var(--mint) 0%, rgba(184, 230, 212, 0.5) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      color: var(--green-dark);
      margin-bottom: 4px;
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-dark);
      line-height: 1.3;
    }

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

    /* ---------- 平台介绍 ---------- */
    .intro-block {
      display: flex;
      gap: 40px;
      align-items: flex-start;
      flex-wrap: wrap;
    }

    .intro-text {
      flex: 1 1 400px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .intro-text p {
      color: var(--text-mid);
      font-size: 16px;
      line-height: 1.8;
    }

    .intro-highlights {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
      gap: 14px;
      margin-top: 8px;
    }

    .highlight-chip {
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid var(--border-light);
      border-radius: 40px;
      padding: 10px 18px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-mid);
      text-align: center;
      transition: background 0.2s, transform 0.2s;
    }

    .highlight-chip:hover {
      background: var(--mint-deep);
      transform: translateY(-2px);
    }

    .intro-visual {
      flex: 0 0 300px;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .intro-visual .visual-card {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .visual-card h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--green-dark);
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .model-tags span {
      background: var(--mint-soft);
      border: 1px solid var(--border-light);
      border-radius: 30px;
      padding: 4px 12px;
      font-size: 12px;
      color: var(--text-mid);
    }

    /* ---------- 流程步骤 ---------- */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 20px;
      counter-reset: step;
    }

    .step-item {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 28px 20px 22px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      position: relative;
      transition: transform 0.25s ease;
    }

    .step-item:hover {
      transform: translateY(-4px);
    }

    .step-item::before {
      counter-increment: step;
      content: "0" counter(step);
      position: absolute;
      top: -14px;
      left: 20px;
      background: var(--green);
      color: #fff;
      font-size: 13px;
      font-weight: 700;
      width: 34px;
      height: 34px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 14px rgba(31, 122, 106, 0.25);
    }

    .step-item h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 8px;
      margin-top: 6px;
    }

    .step-item p {
      font-size: 13px;
      color: var(--text-soft);
      line-height: 1.6;
    }

    /* ---------- 对比评测 ---------- */
    .compare-wrap {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-md);
      padding: 36px 28px;
    }

    .compare-rating {
      display: flex;
      align-items: center;
      gap: 24px;
      flex-wrap: wrap;
      margin-bottom: 30px;
      padding-bottom: 24px;
      border-bottom: 1px dashed var(--border-light);
    }

    .rating-stars {
      display: flex;
      gap: 4px;
      font-size: 26px;
      color: #f5b82e;
      line-height: 1;
    }

    .rating-score {
      font-size: 38px;
      font-weight: 800;
      color: var(--green-dark);
      letter-spacing: -0.02em;
      line-height: 1;
    }

    .rating-score small {
      font-size: 16px;
      font-weight: 500;
      color: var(--text-soft);
      margin-left: 2px;
    }

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

    .compare-table-wrap {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      margin-top: 8px;
      border-radius: var(--radius-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
      font-size: 14px;
    }

    .compare-table th,
    .compare-table td {
      padding: 14px 18px;
      text-align: left;
      border-bottom: 1px solid var(--border-light);
      vertical-align: middle;
    }

    .compare-table th {
      background: var(--mint-soft);
      font-weight: 600;
      color: var(--green-dark);
      white-space: nowrap;
    }

    .compare-table td:first-child {
      font-weight: 600;
      color: var(--text-dark);
      background: #fafefc;
    }

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

    .check-mark {
      color: var(--green);
      font-weight: 700;
    }

    /* ---------- 用户评论 ---------- */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 22px;
    }

    .review-card {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 14px;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .review-stars {
      color: #f5b82e;
      font-size: 16px;
      letter-spacing: 2px;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-mid);
      line-height: 1.7;
      flex: 1;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 10px;
      padding-top: 12px;
      border-top: 1px solid var(--border-light);
    }

    .review-avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--mint-deep), var(--mint));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 700;
      color: var(--green-dark);
    }

    .review-name {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-dark);
    }

    .review-role {
      font-size: 12px;
      color: var(--text-soft);
    }

    /* ---------- 案例展示 ---------- */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
    }

    .case-card {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: transform 0.28s ease, box-shadow 0.28s ease;
      display: flex;
      flex-direction: column;
    }

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

    .case-img-wrap {
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: var(--mint-soft);
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
    }

    .case-body {
      padding: 18px 20px 22px;
    }

    .case-body h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 8px;
      line-height: 1.35;
    }

    .case-body p {
      font-size: 13px;
      color: var(--text-soft);
      line-height: 1.6;
    }

    .case-badge {
      display: inline-block;
      font-size: 11px;
      font-weight: 600;
      color: var(--green-dark);
      background: var(--mint);
      border-radius: 30px;
      padding: 3px 12px;
      margin-bottom: 10px;
    }

    /* ---------- 表单 ---------- */
    .form-section {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      padding: 40px 32px;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

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

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

    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 12px 16px;
      border-radius: 12px;
      border: 1px solid var(--border-light);
      background: #fbfefd;
      font-size: 14px;
      color: var(--text-dark);
      font-family: var(--font);
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
      width: 100%;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--green);
      box-shadow: 0 0 0 3px rgba(31, 122, 106, 0.1);
    }

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

    /* ---------- 文章列表 ---------- */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 18px;
    }

    .article-item {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 20px;
      transition: transform 0.25s ease, border-color 0.25s ease;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .article-item:hover {
      transform: translateY(-3px);
      border-color: var(--mint-deep);
    }

    .article-item h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-dark);
      line-height: 1.4;
    }

    .article-item p {
      font-size: 13px;
      color: var(--text-soft);
      line-height: 1.6;
    }

    .article-item a {
      font-size: 13px;
      font-weight: 600;
      color: var(--green);
      margin-top: auto;
    }

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

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

    .faq-item.active {
      border-color: var(--green-light);
      box-shadow: 0 4px 16px rgba(31, 122, 106, 0.06);
    }

    .faq-question {
      width: 100%;
      background: none;
      border: none;
      padding: 18px 22px;
      text-align: left;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-family: var(--font);
      transition: color 0.2s;
    }

    .faq-question:hover {
      color: var(--green-dark);
    }

    .faq-icon {
      font-size: 20px;
      color: var(--green);
      transition: transform 0.3s ease;
      flex-shrink: 0;
      line-height: 1;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.3s ease;
      padding: 0 22px;
      font-size: 14px;
      color: var(--text-soft);
      line-height: 1.75;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 22px 20px;
    }

    /* ---------- 友情链接 & 页脚 ---------- */
    .friend-links {
      margin-top: 40px;
      padding: 28px 0 20px;
      border-top: 1px solid var(--border-light);
    }

    .friend-links h4 {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-mid);
      margin-bottom: 14px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 22px;
      font-size: 13px;
    }

    .friend-links-list a {
      color: var(--text-soft);
      transition: color 0.2s;
    }

    .friend-links-list a:hover {
      color: var(--green-dark);
    }

    .site-footer {
      background: #0f2e28;
      color: #b8d9d0;
      padding: 48px 0 28px;
      margin-top: 40px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 32px;
      align-items: start;
    }

    .footer-brand {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      color: #a0c4b8;
      max-width: 300px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: #e0f2eb;
      margin-bottom: 16px;
      letter-spacing: 0.02em;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col a {
      font-size: 13px;
      color: #a0c4b8;
      transition: color 0.2s;
    }

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

    .footer-bottom {
      margin-top: 36px;
      padding-top: 22px;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 12px;
      color: #7ea99b;
    }

    .footer-bottom a {
      color: #b8d9d0;
    }

    /* ---------- 浮动客服 & 返回顶部 ---------- */
    .float-actions {
      position: fixed;
      right: 20px;
      bottom: 28px;
      z-index: 90;
      display: flex;
      flex-direction: column;
      gap: 12px;
      align-items: center;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--white);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
      border: 1px solid var(--border-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--green-dark);
      cursor: pointer;
      transition: all 0.25s ease;
      text-decoration: none;
    }

    .float-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 26px rgba(31, 122, 106, 0.2);
      background: var(--mint-soft);
    }

    .float-btn.back-top {
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease, transform 0.25s ease;
    }

    .float-btn.back-top.show {
      opacity: 1;
      pointer-events: auto;
    }

    /* 客服二维码浮动面板 */
    .kefu-panel {
      position: fixed;
      right: 80px;
      bottom: 28px;
      z-index: 89;
      background: var(--white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      padding: 16px;
      display: none;
      width: 180px;
      text-align: center;
      border: 1px solid var(--border-light);
    }

    .kefu-panel.show {
      display: block;
      animation: fadeInUp 0.25s ease;
    }

    .kefu-panel img {
      width: 140px;
      height: auto;
      margin: 0 auto 8px;
      border-radius: 8px;
    }

    .kefu-panel p {
      font-size: 12px;
      color: var(--text-soft);
    }

    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(8px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* 滚动渐入 */
    .fade-in {
      opacity: 0;
      transform: translateY(22px);
      transition: opacity 0.65s ease, transform 0.65s ease;
    }

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

    /* ---------- 响应式 ---------- */
    @media (max-width: 1024px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
    }

    @media (max-width: 900px) {
      .menu-toggle {
        display: block;
      }

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

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

      .nav-links a {
        padding: 12px 16px;
        border-radius: 10px;
      }

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

      .nav-actions {
        margin-left: auto;
      }

      .hero {
        padding: 40px 0 32px;
      }

      .section {
        padding: 48px 0;
      }

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

      .intro-block {
        flex-direction: column;
      }

      .intro-visual {
        flex: 1 1 auto;
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
      }

      .intro-visual .visual-card {
        flex: 1 1 240px;
      }
    }

    @media (max-width: 600px) {
      .container {
        padding: 0 18px;
      }

      .stat-card {
        padding: 12px 18px;
        font-size: 13px;
      }

      .stat-card strong {
        font-size: 18px;
      }

      .hero h1 {
        font-size: 26px;
      }

      .compare-rating {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
      }

      .compare-wrap {
        padding: 24px 16px;
      }

      .form-section {
        padding: 28px 18px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .footer-brand p {
        max-width: 100%;
      }

      .kefu-panel {
        right: 68px;
        bottom: 24px;
        width: 160px;
      }

      .kefu-panel img {
        width: 120px;
      }

      .float-actions {
        right: 14px;
        bottom: 20px;
        gap: 10px;
      }

      .float-btn {
        width: 44px;
        height: 44px;
        font-size: 18px;
      }

      .friend-links-list {
        gap: 8px 16px;
      }

      .compare-table th,
      .compare-table td {
        padding: 10px 12px;
        font-size: 12px;
      }
    }