* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --blue-900: #0a1e3c;
      --blue-800: #0c2a52;
      --blue-700: #123a6b;
      --blue-600: #1550a8;
      --blue-500: #1a6ae0;
      --blue-400: #4d8ef7;
      --blue-300: #8ab8ff;
      --blue-100: #eaf2ff;
      --blue-50: #f4f8ff;
      --white: #ffffff;
      --gray-900: #1a2233;
      --gray-700: #3a4560;
      --gray-500: #6b7a99;
      --gray-300: #d8e0ee;
      --gray-100: #eef2f9;
      --star: #f5a623;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-card: 0 6px 24px rgba(18, 58, 107, 0.08);
      --shadow-hover: 0 14px 40px rgba(21, 80, 168, 0.16);
      --container: 1200px;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font);
      color: var(--gray-900);
      background: linear-gradient(180deg, #eaf2ff 0%, #f4f8ff 40%, #f7faff 100%);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    ul {
      list-style: none;
    }
    .container {
      width: 100%;
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }
    .section {
      padding: 64px 0;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 40px;
    }
    .section-eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 2px;
      color: var(--blue-500);
      background: rgba(26, 106, 224, 0.08);
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 14px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--blue-900);
      line-height: 1.35;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--gray-500);
      line-height: 1.75;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.25s ease;
      border: none;
      font-family: var(--font);
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
      color: var(--white);
      box-shadow: 0 6px 18px rgba(26, 106, 224, 0.32);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 26px rgba(26, 106, 224, 0.44);
    }
    .btn-outline {
      background: var(--white);
      color: var(--blue-600);
      border: 1.5px solid var(--blue-400);
    }
    .btn-outline:hover {
      background: var(--blue-50);
      transform: translateY(-2px);
    }
    .btn-sm {
      padding: 9px 20px;
      font-size: 14px;
    }
    /* 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--gray-300);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 68px;
      gap: 16px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand-logo {
      width: 38px;
      height: 38px;
      object-fit: contain;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--blue-900);
      letter-spacing: 0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--gray-700);
      padding: 8px 13px;
      border-radius: 6px;
      transition: color 0.2s, background 0.2s;
    }
    .nav-links a:hover {
      color: var(--blue-600);
      background: var(--blue-50);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--blue-800);
      margin: 5px 0;
      border-radius: 2px;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      flex-direction: column;
      padding: 8px 0 16px;
      border-top: 1px solid var(--gray-300);
    }
    .mobile-menu.open {
      display: flex;
    }
    .mobile-menu a {
      padding: 11px 8px;
      font-size: 15px;
      color: var(--gray-700);
      border-bottom: 1px solid var(--gray-100);
    }
    /* Hero */
    .hero {
      position: relative;
      padding: 72px 0 80px;
      overflow: hidden;
      background:
        radial-gradient(ellipse 800px 420px at 80% 10%, rgba(26, 106, 224, 0.14), transparent 60%),
        radial-gradient(ellipse 600px 340px at 5% 85%, rgba(77, 142, 247, 0.12), transparent 60%),
        linear-gradient(180deg, #f4f8ff 0%, #eaf2ff 100%);
    }
    .hero::before {
      content: "";
      position: absolute;
      top: -160px;
      right: -120px;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      border: 1px solid rgba(26, 106, 224, 0.14);
      pointer-events: none;
    }
    .hero::after {
      content: "";
      position: absolute;
      bottom: -180px;
      left: -100px;
      width: 360px;
      height: 360px;
      border-radius: 50%;
      border: 1px solid rgba(26, 106, 224, 0.1);
      pointer-events: none;
    }
    .hero-grid {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--white);
      border: 1px solid var(--blue-300);
      color: var(--blue-600);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 999px;
      box-shadow: 0 2px 10px rgba(26, 106, 224, 0.1);
      margin-bottom: 20px;
    }
    .hero-badge::before {
      content: "";
      width: 7px;
      height: 7px;
      background: var(--blue-500);
      border-radius: 50%;
      animation: pulseDot 1.8s infinite;
    }
    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(0.75); }
    }
    .hero h1 {
      font-size: 42px;
      line-height: 1.28;
      font-weight: 900;
      color: var(--blue-900);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero h1 em {
      font-style: normal;
      color: var(--blue-500);
      position: relative;
    }
    .hero-sub {
      font-size: 16px;
      color: var(--gray-700);
      line-height: 1.85;
      max-width: 560px;
      margin-bottom: 30px;
    }
    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
      margin-bottom: 28px;
    }
    .hero-trust {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 22px;
      font-size: 13px;
      color: var(--gray-500);
    }
    .hero-trust span {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hero-trust span::before {
      content: "✓";
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 16px;
      height: 16px;
      font-size: 10px;
      font-weight: 700;
      color: var(--white);
      background: var(--blue-500);
      border-radius: 50%;
    }
    .hero-panel {
      background: var(--white);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-lg);
      padding: 26px;
      box-shadow: 0 16px 48px rgba(18, 58, 107, 0.12);
      position: relative;
    }
    .hero-panel-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--blue-900);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .hero-panel-title small {
      font-size: 12px;
      font-weight: 500;
      color: var(--gray-500);
      background: var(--blue-50);
      padding: 3px 10px;
      border-radius: 999px;
    }
    .stat-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 16px;
    }
    .stat-item {
      background: var(--blue-50);
      border-radius: var(--radius-sm);
      padding: 14px 16px;
      border: 1px solid rgba(77, 142, 247, 0.18);
      transition: transform 0.25s ease;
    }
    .stat-item:hover {
      transform: translateY(-3px);
    }
    .stat-num {
      font-size: 26px;
      font-weight: 800;
      color: var(--blue-600);
      line-height: 1.2;
    }
    .stat-label {
      font-size: 12px;
      color: var(--gray-500);
      margin-top: 2px;
    }
    .hero-model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .hero-model-tags span {
      font-size: 12px;
      color: var(--blue-700);
      background: var(--white);
      border: 1px solid var(--gray-300);
      padding: 4px 11px;
      border-radius: 6px;
      transition: all 0.2s;
    }
    .hero-model-tags span:hover {
      border-color: var(--blue-400);
      color: var(--blue-600);
      transform: translateY(-2px);
    }
    /* 通用卡片 */
    .card {
      background: var(--white);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-card);
      transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
    }
    .card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: var(--blue-300);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--blue-100), #dce9ff);
      color: var(--blue-600);
      font-size: 22px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }
    .card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--blue-900);
      margin-bottom: 8px;
    }
    .card p {
      font-size: 14px;
      color: var(--gray-500);
      line-height: 1.75;
    }
    /* 网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    /* 能力标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .tag-cloud span {
      background: var(--white);
      border: 1px solid var(--gray-300);
      color: var(--blue-700);
      font-size: 13px;
      padding: 6px 15px;
      border-radius: 999px;
      transition: all 0.22s;
      cursor: default;
    }
    .tag-cloud span:hover {
      background: var(--blue-500);
      color: var(--white);
      border-color: var(--blue-500);
      transform: translateY(-2px);
    }
    /* 流程 */
    .flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .flow-step {
      background: var(--white);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-md);
      padding: 26px 22px;
      position: relative;
      box-shadow: var(--shadow-card);
      transition: transform 0.28s ease, box-shadow 0.28s ease;
    }
    .flow-step:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .flow-num {
      font-size: 14px;
      font-weight: 800;
      color: var(--white);
      background: var(--blue-500);
      width: 32px;
      height: 32px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      margin-bottom: 14px;
    }
    .flow-step h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--blue-900);
      margin-bottom: 6px;
    }
    .flow-step p {
      font-size: 13px;
      color: var(--gray-500);
    }
    /* 对比表 */
    .compare-table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-md);
      border: 1px solid var(--gray-300);
      box-shadow: var(--shadow-card);
      background: var(--white);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
      font-size: 14px;
    }
    .compare-table th {
      background: var(--blue-800);
      color: var(--white);
      padding: 15px 18px;
      text-align: left;
      font-weight: 600;
      white-space: nowrap;
    }
    .compare-table td {
      padding: 14px 18px;
      border-top: 1px solid var(--gray-100);
      color: var(--gray-700);
      vertical-align: top;
    }
    .compare-table tr:nth-child(even) td {
      background: var(--blue-50);
    }
    .compare-table .highlight {
      color: var(--blue-600);
      font-weight: 700;
    }
    .compare-rating {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 18px;
      margin-bottom: 28px;
      background: var(--white);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-md);
      padding: 24px 28px;
      box-shadow: var(--shadow-card);
    }
    .score-box {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    .score-num {
      font-size: 48px;
      font-weight: 900;
      color: var(--blue-600);
      line-height: 1;
    }
    .score-total {
      font-size: 16px;
      color: var(--gray-500);
    }
    .stars {
      display: flex;
      gap: 3px;
      color: var(--star);
      font-size: 20px;
      letter-spacing: 1px;
    }
    .rating-tips {
      font-size: 13px;
      color: var(--gray-500);
    }
    /* 案例 */
    .case-card {
      background: var(--white);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: transform 0.28s ease, box-shadow 0.28s ease;
    }
    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: var(--blue-100);
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .case-img img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }
    .case-body {
      padding: 20px 22px;
    }
    .case-body h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--blue-900);
      margin-bottom: 6px;
    }
    .case-body p {
      font-size: 13px;
      color: var(--gray-500);
      line-height: 1.7;
    }
    .case-tag {
      display: inline-block;
      font-size: 12px;
      color: var(--blue-600);
      background: var(--blue-100);
      padding: 2px 10px;
      border-radius: 4px;
      margin-bottom: 10px;
      font-weight: 600;
    }
    /* 评论 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .review-card {
      background: var(--white);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-card);
      transition: transform 0.28s ease, box-shadow 0.28s ease;
      display: flex;
      flex-direction: column;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .review-text {
      font-size: 14px;
      color: var(--gray-700);
      line-height: 1.8;
      flex: 1;
      margin-bottom: 16px;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--gray-100);
      padding-top: 14px;
    }
    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--blue-400), var(--blue-600));
      color: var(--white);
      font-weight: 700;
      font-size: 15px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .review-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--blue-900);
    }
    .review-role {
      font-size: 12px;
      color: var(--gray-500);
    }
    /* FAQ */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--white);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: border-color 0.25s, box-shadow 0.25s;
    }
    .faq-item:hover {
      border-color: var(--blue-300);
    }
    .faq-item.open {
      border-color: var(--blue-400);
      box-shadow: 0 4px 16px rgba(26, 106, 224, 0.1);
    }
    .faq-q {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 22px;
      font-size: 15px;
      font-weight: 600;
      color: var(--blue-900);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-family: var(--font);
    }
    .faq-q::after {
      content: "+";
      font-size: 20px;
      color: var(--blue-500);
      font-weight: 400;
      transition: transform 0.28s ease;
      flex-shrink: 0;
    }
    .faq-item.open .faq-q::after {
      transform: rotate(45deg);
    }
    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 22px;
      font-size: 14px;
      color: var(--gray-500);
      line-height: 1.8;
    }
    .faq-item.open .faq-a {
      max-height: 300px;
      padding: 0 22px 18px;
    }
    /* 表单 */
    .form-wrap {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 40px;
      align-items: start;
    }
    .form-info h3 {
      font-size: 22px;
      font-weight: 800;
      color: var(--blue-900);
      margin-bottom: 12px;
    }
    .form-info p {
      font-size: 14px;
      color: var(--gray-500);
      line-height: 1.85;
      margin-bottom: 20px;
    }
    .contact-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .contact-item {
      display: flex;
      gap: 12px;
      font-size: 14px;
      color: var(--gray-700);
      align-items: flex-start;
    }
    .contact-item strong {
      color: var(--blue-900);
      min-width: 76px;
      flex-shrink: 0;
    }
    .form-card {
      background: var(--white);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-card);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--gray-700);
      margin-bottom: 6px;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 11px 14px;
      font-size: 14px;
      font-family: var(--font);
      color: var(--gray-900);
      background: var(--blue-50);
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-sm);
      transition: border-color 0.2s, box-shadow 0.2s;
      outline: none;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--blue-400);
      box-shadow: 0 0 0 3px rgba(26, 106, 224, 0.12);
      background: var(--white);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }
    /* 文章 */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 0;
      border: 1px solid var(--gray-300);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: var(--white);
      box-shadow: var(--shadow-card);
    }
    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 16px 24px;
      border-bottom: 1px solid var(--gray-100);
      transition: background 0.2s;
    }
    .article-item:last-child {
      border-bottom: none;
    }
    .article-item:hover {
      background: var(--blue-50);
    }
    .article-title {
      font-size: 15px;
      font-weight: 500;
      color: var(--gray-700);
    }
    .article-more {
      font-size: 13px;
      color: var(--blue-500);
      font-weight: 600;
      white-space: nowrap;
    }
    /* 友情链接 */
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 20px;
      justify-content: center;
    }
    .friend-links a {
      font-size: 13px;
      color: var(--gray-500);
      transition: color 0.2s;
    }
    .friend-links a:hover {
      color: var(--blue-600);
    }
    /* 页脚 */
    .site-footer {
      background: var(--blue-900);
      color: #b8c9e8;
      padding: 48px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
      gap: 36px;
      padding-bottom: 36px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    }
    .footer-brand .brand-name {
      color: var(--white);
      margin-bottom: 10px;
    }
    .footer-desc {
      font-size: 13px;
      line-height: 1.8;
      color: #9fb3d6;
      max-width: 280px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 14px;
    }
    .footer-col ul li {
      margin-bottom: 8px;
    }
    .footer-col ul li a {
      font-size: 13px;
      color: #9fb3d6;
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: var(--white);
    }
    .footer-contact p {
      font-size: 13px;
      color: #9fb3d6;
      margin-bottom: 8px;
      line-height: 1.6;
    }
    .footer-contact strong {
      color: var(--white);
    }
    .footer-wechat {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 12px;
    }
    .footer-wechat img {
      width: 64px;
      height: 64px;
      object-fit: contain;
      border-radius: 6px;
      background: var(--white);
      padding: 4px;
    }
    .footer-wechat span {
      font-size: 12px;
      color: #9fb3d6;
      line-height: 1.5;
    }
    .footer-bottom {
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      font-size: 12px;
      color: #7b90b8;
    }
    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 32px;
      z-index: 200;
      display: flex;
      flex-direction: column;
      gap: 12px;
      align-items: center;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--white);
      border: 1px solid var(--gray-300);
      box-shadow: 0 6px 20px rgba(18, 58, 107, 0.18);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.25s ease;
      color: var(--blue-600);
      font-size: 20px;
      text-decoration: none;
    }
    .float-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 28px rgba(26, 106, 224, 0.3);
      background: var(--blue-50);
    }
    .float-top {
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s;
    }
    .float-top.show {
      opacity: 1;
      visibility: visible;
    }
    /* 返入动画 */
    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .hero h1 {
        font-size: 34px;
      }
      .hero-panel {
        max-width: 520px;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-actions .btn {
        display: none;
      }
    }
    @media (max-width: 768px) {
      .section {
        padding: 44px 0;
      }
      .section-title {
        font-size: 24px;
      }
      .hero {
        padding: 48px 0 56px;
      }
      .hero h1 {
        font-size: 28px;
      }
      .hero-sub {
        font-size: 15px;
      }
      .grid-3,
      .grid-2,
      .grid-4,
      .review-grid,
      .flow {
        grid-template-columns: 1fr;
      }
      .form-wrap {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .compare-rating {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
      .stat-row {
        grid-template-columns: 1fr 1fr;
      }
      .article-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
      }
      .float-service {
        right: 14px;
        bottom: 20px;
      }
      .float-btn {
        width: 44px;
        height: 44px;
        font-size: 18px;
      }
    }
    @media (max-width: 480px) {
      .container {
        padding: 0 16px;
      }
      .hero h1 {
        font-size: 24px;
      }
      .hero-cta {
        flex-direction: column;
        align-items: stretch;
      }
      .hero-cta .btn {
        width: 100%;
      }
      .stat-row {
        grid-template-columns: 1fr;
      }
      .brand-name {
        font-size: 17px;
      }
    }