* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
      background: #f7f9fc;
      color: #1a1e2b;
      line-height: 1.6;
      overflow-x: hidden;
    }
    .container {
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.05);
      transition: box-shadow 0.2s ease;
    }
    .site-header.scrolled {
      box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      padding: 12px 0;
      flex-wrap: wrap;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.3rem;
      color: #0b2b5c;
      text-decoration: none;
      letter-spacing: -0.02em;
      flex-shrink: 0;
    }
    .brand img {
      display: block;
      height: 36px;
      width: auto;
    }
    .nav-links {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 0;
      list-style: none;
    }
    .nav-links li {
      margin: 0;
    }
    .nav-links a {
      display: block;
      padding: 8px 10px;
      font-size: 0.92rem;
      color: #2d3345;
      text-decoration: none;
      font-weight: 500;
      border-radius: 8px;
      transition: color 0.2s, background 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: #0057ff;
      background: rgba(0,87,255,0.06);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      padding: 10px 22px;
      border-radius: 60px;
      font-weight: 600;
      font-size: 0.92rem;
      text-decoration: none;
      border: none;
      cursor: pointer;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
      line-height: 1.4;
      white-space: nowrap;
    }
    .btn:active {
      transform: scale(0.97);
    }
    .btn-primary {
      background: linear-gradient(135deg, #0057ff, #3d7eff);
      color: #ffffff;
      box-shadow: 0 6px 18px rgba(0,87,255,0.25);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #0048d6, #2e6bf0);
      box-shadow: 0 10px 24px rgba(0,87,255,0.35);
    }
    .btn-outline {
      background: transparent;
      color: #0b2b5c;
      border: 1.5px solid #c9d6ee;
    }
    .btn-outline:hover {
      background: #eef3fd;
      border-color: #0057ff;
      color: #0057ff;
    }
    .btn-secondary {
      background: #eef3fd;
      color: #0057ff;
    }
    .btn-secondary:hover {
      background: #dce8ff;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      width: 42px;
      height: 42px;
      font-size: 1.6rem;
      color: #0b2b5c;
      cursor: pointer;
      border-radius: 8px;
      align-items: center;
      justify-content: center;
    }
    /* Hero 首屏 - 无图片 */
    .hero {
      background: radial-gradient(ellipse at 20% 30%, #dce9ff 0%, transparent 60%),
                  radial-gradient(ellipse at 80% 70%, #ffe8f0 0%, transparent 55%),
                  linear-gradient(135deg, #f7fbff 0%, #eef4ff 100%);
      padding: 80px 0 70px;
      position: relative;
      overflow: hidden;
    }
    .hero::after {
      content: '';
      position: absolute;
      width: 600px;
      height: 600px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0,87,255,0.06) 0%, transparent 70%);
      top: -200px;
      right: -100px;
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: clamp(2rem, 4.2vw, 3.2rem);
      line-height: 1.2;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: #0b2b5c;
      margin-bottom: 20px;
    }
    .hero-content h1 span {
      color: #0057ff;
      position: relative;
      display: inline-block;
    }
    .hero-content p {
      font-size: 1.1rem;
      color: #3a4258;
      margin-bottom: 32px;
      max-width: 520px;
    }
    .hero-badge {
      display: inline-block;
      background: rgba(0,87,255,0.1);
      color: #0057ff;
      font-size: 0.85rem;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 60px;
      margin-bottom: 20px;
      letter-spacing: 0.02em;
      animation: pulseBadge 3s endless ease-in-out infinite;
    }
    @keyframes pulseBadge {
      0%, 100% { transform: scale(1); }
      50% { transform: scale(1.02); }
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-visual {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .stats-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .stat-card {
      background: #ffffff;
      border-radius: 20px;
      padding: 24px 18px;
      box-shadow: 0 12px 30px rgba(0,40,100,0.06);
      border: 1px solid rgba(0,87,255,0.08);
      text-align: center;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 18px 36px rgba(0,60,150,0.12);
    }
    .stat-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: #0057ff;
      line-height: 1.2;
      letter-spacing: -0.03em;
    }
    .stat-label {
      font-size: 0.85rem;
      color: #5b637b;
      margin-top: 4px;
      font-weight: 500;
    }
    .hero-highlight {
      background: #ffffff;
      border-radius: 20px;
      padding: 20px 24px;
      border: 1px solid rgba(0,87,255,0.12);
      box-shadow: 0 12px 30px rgba(0,40,100,0.04);
      display: flex;
      align-items: center;
      gap: 16px;
      transition: box-shadow 0.25s;
    }
    .hero-highlight:hover {
      box-shadow: 0 18px 36px rgba(0,60,150,0.1);
    }
    .hero-highlight-icon {
      width: 50px;
      height: 50px;
      border-radius: 14px;
      background: linear-gradient(135deg, #0057ff, #6c9cff);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .hero-highlight-icon svg {
      width: 26px;
      height: 26px;
      fill: #ffffff;
    }
    .hero-highlight-text {
      font-weight: 600;
      color: #1a1e2b;
      font-size: 0.95rem;
      line-height: 1.4;
    }
    .hero-highlight-text small {
      display: block;
      font-weight: 400;
      color: #5b637b;
      font-size: 0.82rem;
      margin-top: 2px;
    }
    /* 板块通用 */
    section {
      padding: 72px 0;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }
    .section-eyebrow {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: #0057ff;
      background: rgba(0,87,255,0.08);
      padding: 4px 14px;
      border-radius: 40px;
      margin-bottom: 14px;
    }
    .section-header h2 {
      font-size: clamp(1.7rem, 3vw, 2.4rem);
      font-weight: 800;
      color: #0b2b5c;
      letter-spacing: -0.02em;
      margin-bottom: 14px;
      line-height: 1.25;
    }
    .section-header p {
      font-size: 1.05rem;
      color: #4c546a;
      max-width: 640px;
      margin: 0 auto;
    }
    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .card {
      background: #ffffff;
      border-radius: 24px;
      padding: 30px 26px;
      border: 1px solid rgba(0,40,100,0.06);
      box-shadow: 0 8px 24px rgba(0,20,60,0.03);
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: 0 18px 40px rgba(0,60,140,0.08);
      border-color: rgba(0,87,255,0.18);
    }
    .card-icon {
      width: 54px;
      height: 54px;
      border-radius: 16px;
      background: linear-gradient(135deg, #e3edff, #d0e0ff);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }
    .card-icon svg {
      width: 28px;
      height: 28px;
      fill: #0057ff;
    }
    .card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: #0b2b5c;
      margin-bottom: 10px;
    }
    .card p {
      font-size: 0.92rem;
      color: #4c546a;
      line-height: 1.65;
    }
    /* 案例展示 - 有图 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .case-item {
      border-radius: 20px;
      overflow: hidden;
      background: #fff;
      box-shadow: 0 8px 20px rgba(0,0,0,0.04);
      border: 1px solid #eef1f7;
      transition: transform 0.3s ease, box-shadow 0.3s;
    }
    .case-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 36px rgba(0,60,140,0.1);
    }
    .case-thumb {
      width: 100%;
      aspect-ratio: 4 / 3;
      background: #f0f4fc;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .case-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .case-item:hover .case-thumb img {
      transform: scale(1.03);
    }
    .case-info {
      padding: 16px 18px 18px;
    }
    .case-info h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #0b2b5c;
      margin-bottom: 4px;
    }
    .case-info span {
      font-size: 0.82rem;
      color: #7a8198;
    }
    /* 对比表格 */
    .compare-table-wrap {
      background: #ffffff;
      border-radius: 28px;
      padding: 8px;
      border: 1px solid #e6ebf5;
      box-shadow: 0 8px 30px rgba(0,0,0,0.04);
      overflow-x: auto;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 700px;
      font-size: 0.92rem;
    }
    .compare-table th {
      text-align: left;
      padding: 18px 20px;
      background: #f5f8ff;
      font-weight: 700;
      color: #0b2b5c;
      font-size: 0.88rem;
      letter-spacing: 0.01em;
      border-bottom: 1px solid #e3e9f5;
    }
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f0f3fa;
      color: #333a4e;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .rating-stars {
      color: #ff9f1c;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }
    .score-badge {
      background: #e8f0fe;
      color: #0057ff;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 40px;
      font-size: 0.88rem;
      display: inline-block;
    }
    /* 评论卡片 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border-radius: 22px;
      padding: 24px;
      border: 1px solid #edf1f8;
      box-shadow: 0 4px 16px rgba(0,0,0,0.02);
      transition: transform 0.2s, box-shadow 0.2s;
      display: flex;
      flex-direction: column;
    }
    .review-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px rgba(0,60,140,0.07);
    }
    .review-text {
      font-size: 0.95rem;
      color: #2d3345;
      line-height: 1.7;
      margin-bottom: 18px;
      flex: 1;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: auto;
    }
    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #d0e0ff, #a8c4ff);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #0057ff;
      font-size: 1rem;
      flex-shrink: 0;
    }
    .review-meta strong {
      display: block;
      font-size: 0.92rem;
      color: #0b2b5c;
    }
    .review-meta span {
      font-size: 0.78rem;
      color: #7a8198;
    }
    /* FAQ 折叠 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border-radius: 16px;
      margin-bottom: 12px;
      border: 1px solid #e9eef7;
      overflow: hidden;
      transition: box-shadow 0.2s;
    }
    .faq-item:hover {
      box-shadow: 0 4px 16px rgba(0,60,140,0.06);
    }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 18px 24px;
      font-weight: 600;
      color: #0b2b5c;
      cursor: pointer;
      user-select: none;
      font-size: 1rem;
      gap: 16px;
    }
    .faq-question .faq-icon {
      font-size: 1.5rem;
      color: #0057ff;
      font-weight: 300;
      transition: transform 0.25s;
      flex-shrink: 0;
      width: 24px;
      text-align: center;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.25s;
      padding: 0 24px;
      color: #4c546a;
      font-size: 0.92rem;
      line-height: 1.7;
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }
    /* 表单 */
    .form-card {
      background: #ffffff;
      border-radius: 28px;
      padding: 40px;
      border: 1px solid #e6ebf5;
      box-shadow: 0 16px 40px rgba(0,40,100,0.05);
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full {
      grid-column: 1 / -1;
    }
    .form-group label {
      font-size: 0.88rem;
      font-weight: 600;
      color: #2d3345;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 12px 16px;
      border-radius: 12px;
      border: 1.5px solid #dde3ed;
      font-family: inherit;
      font-size: 0.92rem;
      background: #fafcff;
      color: #1a1e2b;
      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: #0057ff;
      box-shadow: 0 0 0 3px rgba(0,87,255,0.1);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }
    .form-submit {
      margin-top: 8px;
      width: 100%;
      padding: 14px;
      font-size: 1rem;
    }
    /* 文章列表 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .article-item {
      background: #ffffff;
      border-radius: 16px;
      padding: 22px;
      border: 1px solid #edf1f8;
      text-decoration: none;
      color: inherit;
      display: block;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .article-item:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 24px rgba(0,60,140,0.07);
    }
    .article-item h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #0b2b5c;
      margin-bottom: 8px;
      line-height: 1.4;
    }
    .article-item p {
      font-size: 0.85rem;
      color: #7a8198;
    }
    /* 友情链接 & footer */
    .footer {
      background: #0b2b5c;
      color: #dce6f5;
      padding: 48px 0 24px;
      margin-top: 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 36px;
      padding-bottom: 32px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .footer h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      letter-spacing: 0.02em;
    }
    .footer p, .footer a {
      font-size: 0.88rem;
      color: #b8c9e5;
      text-decoration: none;
      line-height: 1.8;
    }
    .footer a:hover {
      color: #ffffff;
      text-decoration: underline;
    }
    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links a {
      display: block;
    }
    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding-top: 24px;
      font-size: 0.82rem;
      color: #8da4c9;
    }
    .footer-bottom a {
      color: #8da4c9;
      text-decoration: none;
    }
    .footer-bottom a:hover {
      color: #fff;
    }
    /* 浮动客服 & 返回顶部 */
    .float-actions {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 200;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 8px 24px rgba(0,0,0,0.12);
      border: 1px solid #e6ebf5;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.4rem;
      color: #0057ff;
      transition: transform 0.2s, box-shadow 0.2s;
      text-decoration: none;
    }
    .float-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px rgba(0,60,150,0.18);
    }
    .float-btn img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: 50%;
    }
    /* 滚动动画 */
    .fade-in {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .grid-3, .review-grid, .article-list {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 0;
        border-top: 1px solid #eef1f7;
        margin-top: 8px;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links a {
        padding: 10px 14px;
        width: 100%;
      }
      .menu-toggle {
        display: flex;
      }
      .nav-actions .btn-outline {
        display: none;
      }
      .grid-3, .grid-2, .review-grid, .article-list, .case-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .hero-content h1 {
        font-size: 2rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .stats-row {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
      }
      .stat-card {
        padding: 16px 8px;
      }
      .stat-number {
        font-size: 1.6rem;
      }
      section {
        padding: 48px 0;
      }
      .form-card {
        padding: 24px;
      }
    }
    @media (max-width: 480px) {
      .stats-row {
        grid-template-columns: 1fr;
      }
      .hero-actions {
        flex-direction: column;
      }
      .hero-actions .btn {
        width: 100%;
      }
    }
    /* 表格横向滚动提示 */
    .table-scroll-hint {
      font-size: 0.8rem;
      color: #7a8198;
      margin-top: 8px;
      text-align: center;
      display: none;
    }
    @media (max-width: 768px) {
      .table-scroll-hint {
        display: block;
      }
    }
    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 28px;
    }
    .tag-cloud span {
      background: #f0f4fc;
      padding: 6px 16px;
      border-radius: 60px;
      font-size: 0.82rem;
      color: #2d3345;
      border: 1px solid #e0e7f3;
      transition: background 0.2s, color 0.2s;
    }
    .tag-cloud span:hover {
      background: #0057ff;
      color: #fff;
      border-color: #0057ff;
    }
    /* Token 比价参考条 */
    .price-compare-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      justify-content: center;
      margin-top: 28px;
    }
    .price-chip {
      background: #ffffff;
      padding: 16px 28px;
      border-radius: 60px;
      border: 1px solid #e0e7f3;
      font-weight: 600;
      color: #0b2b5c;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .price-chip strong {
      color: #0057ff;
      font-size: 1.2rem;
    }
    .price-chip small {
      color: #7a8198;
      font-weight: 400;
      font-size: 0.78rem;
    }