* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --bg-base: #f6f9fe;
      --bg-soft: #ffffff;
      --ink-900: #0b1a2e;
      --ink-700: #1e2f44;
      --ink-500: #44576e;
      --ink-300: #7a8da3;
      --line: #e2eaf1;
      --cyan: #00c2ff;
      --blue: #1a5eff;
      --purple: #8b5cf6;
      --pink: #ff4d8f;
      --neon-glow: 0 0 18px rgba(0, 194, 255, 0.35), 0 0 42px rgba(26, 94, 255, 0.18);
      --radius-card: 24px;
      --radius-sm: 16px;
      --shadow-card: 0 12px 36px rgba(11, 26, 46, 0.06);
      --shadow-hover: 0 22px 48px rgba(0, 140, 255, 0.14);
      --font-sys: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-sys);
      background: var(--bg-base);
      color: var(--ink-700);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      background-image: radial-gradient(circle at 10% 20%, rgba(0, 194, 255, 0.05) 0%, transparent 30%),
                        radial-gradient(circle at 90% 10%, rgba(139, 92, 246, 0.06) 0%, transparent 35%),
                        linear-gradient(180deg, #f6f9fe 0%, #f0f6fd 100%);
      background-attachment: fixed;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease, opacity 0.2s ease;
    }
    img {
      display: block;
      max-width: 100%;
      height: auto;
    }
    ul {
      list-style: none;
    }
    /* ----- 通用按钮/标签 ----- */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #1a5eff, #00c2ff);
      color: #fff;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 12px 28px;
      border-radius: 50px;
      border: none;
      cursor: pointer;
      transition: transform 0.2s ease, box-shadow 0.25s ease;
      box-shadow: 0 6px 18px rgba(26, 94, 255, 0.28);
      letter-spacing: 0.3px;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(0, 194, 255, 0.4);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #fff;
      color: var(--ink-700);
      font-weight: 600;
      font-size: 0.95rem;
      padding: 12px 28px;
      border-radius: 50px;
      border: 1.5px solid var(--line);
      cursor: pointer;
      transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
    }
    .btn-outline:hover {
      border-color: var(--cyan);
      background: #f8fcff;
      box-shadow: 0 8px 20px rgba(0, 194, 255, 0.12);
    }
    .tag {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 500;
      padding: 4px 12px;
      border-radius: 30px;
      background: rgba(0, 194, 255, 0.1);
      color: #0077b3;
      letter-spacing: 0.2px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--ink-900);
      line-height: 1.3;
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }
    .section-sub {
      font-size: 1rem;
      color: var(--ink-500);
      max-width: 680px;
      margin-bottom: 36px;
    }
    /* ----- 导航 ----- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      background: rgba(255, 255, 255, 0.82);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(226, 234, 241, 0.7);
      box-shadow: 0 2px 16px rgba(0, 0, 0, 0.02);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      gap: 24px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand-logo img {
      height: 36px;
      width: auto;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--ink-700);
      padding: 8px 14px;
      border-radius: 30px;
      transition: background 0.2s, color 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      background: rgba(0, 194, 255, 0.08);
      color: #005a9e;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--line);
      border-radius: 12px;
      padding: 8px 12px;
      font-size: 1.4rem;
      line-height: 1;
      color: var(--ink-700);
      cursor: pointer;
    }
    /* 移动端导航 */
    @media (max-width: 1024px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px 24px;
        border-bottom: 1px solid var(--line);
        box-shadow: 0 24px 32px rgba(0, 0, 0, 0.06);
        gap: 4px;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        padding: 12px 16px;
        border-radius: 14px;
      }
      .menu-toggle {
        display: block;
      }
      .header-inner {
        position: relative;
      }
    }
    /* ----- Hero 首屏 (无图片) ----- */
    .hero-section {
      padding: 64px 0 80px;
      position: relative;
      overflow: hidden;
    }
    .hero-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 70% 20%, rgba(0, 194, 255, 0.12) 0%, transparent 50%),
                  radial-gradient(circle at 20% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
      pointer-events: none;
    }
    .hero-inner {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 0.9fr;
      align-items: center;
      gap: 40px;
    }
    .hero-badge {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 600;
      letter-spacing: 0.6px;
      padding: 6px 18px;
      border-radius: 40px;
      background: rgba(0, 194, 255, 0.14);
      color: #0077b3;
      margin-bottom: 20px;
      border: 1px solid rgba(0, 194, 255, 0.2);
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.2;
      color: var(--ink-900);
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }
    .hero-title span {
      background: linear-gradient(135deg, #1a5eff, #00c2ff, #8b5cf6);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: var(--ink-500);
      max-width: 540px;
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 28px;
    }
    .hero-stats {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
      padding-top: 16px;
      border-top: 1px solid rgba(226, 234, 241, 0.8);
    }
    .hero-stat-item strong {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--ink-900);
      display: block;
      line-height: 1.2;
    }
    .hero-stat-item span {
      font-size: 0.82rem;
      color: var(--ink-300);
      font-weight: 500;
    }
    /* 右侧几何装饰 */
    .hero-visual {
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      min-height: 320px;
    }
    .orb-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      width: 100%;
      max-width: 360px;
    }
    .orb-card {
      background: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.9);
      border-radius: 22px;
      padding: 24px 18px;
      box-shadow: 0 12px 32px rgba(0, 140, 255, 0.08);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
    }
    .orb-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .orb-icon {
      width: 40px;
      height: 40px;
      border-radius: 14px;
      background: linear-gradient(135deg, #eef6ff, #d9ecff);
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 12px;
      font-size: 1.3rem;
    }
    .orb-card h4 {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--ink-900);
      margin-bottom: 4px;
    }
    .orb-card p {
      font-size: 0.75rem;
      color: var(--ink-300);
    }
    @media (max-width: 900px) {
      .hero-inner {
        grid-template-columns: 1fr;
        text-align: left;
      }
      .hero-title {
        font-size: 2.2rem;
      }
      .hero-visual {
        min-height: auto;
        margin-top: 20px;
      }
      .orb-grid {
        max-width: 100%;
      }
    }
    @media (max-width: 600px) {
      .hero-title {
        font-size: 1.8rem;
      }
      .hero-stats {
        gap: 20px;
      }
      .hero-stat-item strong {
        font-size: 1.3rem;
      }
      .orb-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
      }
    }

    /* ----- 通用卡片区 ----- */
    .section {
      padding: 70px 0;
    }
    .section:nth-child(even) {
      background: rgba(255, 255, 255, 0.55);
    }
    .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: 24px;
    }
    @media (max-width: 960px) {
      .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 640px) {
      .grid-3, .grid-4, .grid-2 {
        grid-template-columns: 1fr;
      }
    }
    .card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 28px 24px;
      border: 1px solid rgba(226, 234, 241, 0.8);
      box-shadow: var(--shadow-card);
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s;
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 194, 255, 0.2);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 16px;
      background: linear-gradient(135deg, #eef7ff, #e0efff);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 18px;
    }
    .card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 10px;
    }
    .card p {
      font-size: 0.9rem;
      color: var(--ink-500);
      line-height: 1.7;
      flex: 1;
    }
    .card .tag {
      margin-top: 16px;
      align-self: flex-start;
    }
    /* 对比表格 */
    .table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-sm);
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-card);
    }
    table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.9rem;
      min-width: 680px;
    }
    th, td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid #edf2f7;
    }
    th {
      background: #f8fbfe;
      font-weight: 600;
      color: var(--ink-900);
      white-space: nowrap;
    }
    tr:last-child td {
      border-bottom: none;
    }
    .highlight-row {
      background: rgba(0, 194, 255, 0.04);
    }
    .star-rating {
      color: #ffb800;
      letter-spacing: 2px;
      font-size: 1rem;
    }
    /* 流程步骤 */
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-item {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 28px 20px;
      text-align: center;
      border: 1px solid var(--line);
      transition: transform 0.2s, box-shadow 0.2s;
      position: relative;
    }
    .step-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #1a5eff, #00c2ff);
      color: #fff;
      font-weight: 700;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      box-shadow: 0 6px 14px rgba(0, 194, 255, 0.3);
    }
    .step-item h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--ink-900);
      margin-bottom: 8px;
    }
    .step-item p {
      font-size: 0.84rem;
      color: var(--ink-500);
    }
    @media (max-width: 800px) {
      .steps {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 480px) {
      .steps {
        grid-template-columns: 1fr;
      }
    }
    /* FAQ 折叠 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #fff;
      border-radius: var(--radius-sm);
      border: 1px solid var(--line);
      overflow: hidden;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .faq-item:hover {
      border-color: rgba(0, 194, 255, 0.3);
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.02);
    }
    .faq-question {
      width: 100%;
      background: transparent;
      border: none;
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1rem;
      font-weight: 600;
      color: var(--ink-900);
      text-align: left;
      cursor: pointer;
      gap: 16px;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: #fafdff;
    }
    .faq-question .faq-arrow {
      font-size: 1.2rem;
      color: var(--ink-300);
      transition: transform 0.25s ease;
      flex-shrink: 0;
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
      color: var(--cyan);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 22px;
      color: var(--ink-500);
      font-size: 0.92rem;
      line-height: 1.7;
      border-top: 0 solid transparent;
    }
    .faq-item.active .faq-answer {
      max-height: 280px;
      padding: 12px 22px 20px;
      border-top-color: #edf2f7;
    }
    /* 评论卡片 */
    .review-card {
      background: #fff;
      border-radius: var(--radius-card);
      padding: 28px 24px;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-card);
      transition: transform 0.2s, box-shadow 0.2s;
      display: flex;
      flex-direction: column;
    }
    .review-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    .review-stars {
      color: #ffb800;
      font-size: 0.95rem;
      letter-spacing: 2px;
      margin-bottom: 12px;
    }
    .review-text {
      font-size: 0.92rem;
      color: var(--ink-500);
      line-height: 1.7;
      flex: 1;
      margin-bottom: 20px;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #d9ecff, #b8d9ff);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--ink-700);
      font-size: 1rem;
      flex-shrink: 0;
    }
    .review-user strong {
      font-size: 0.9rem;
      display: block;
      color: var(--ink-900);
    }
    .review-user span {
      font-size: 0.76rem;
      color: var(--ink-300);
    }
    /* 表单 */
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full {
      grid-column: span 2;
    }
    .form-group label {
      font-size: 0.84rem;
      font-weight: 600;
      color: var(--ink-700);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 14px;
      border: 1.5px solid var(--line);
      font-size: 0.92rem;
      background: #fafdff;
      color: var(--ink-900);
      transition: border 0.2s, box-shadow 0.2s;
      font-family: var(--font-sys);
      outline: none;
    }
    .form-control:focus {
      border-color: var(--cyan);
      box-shadow: 0 0 0 4px rgba(0, 194, 255, 0.1);
      background: #fff;
    }
    textarea.form-control {
      min-height: 100px;
      resize: vertical;
    }
    .form-submit {
      grid-column: span 2;
      display: flex;
      justify-content: flex-start;
      margin-top: 8px;
    }
    @media (max-width: 600px) {
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .form-submit {
        grid-column: span 1;
      }
    }
    /* 底部 */
    .site-footer {
      background: #0b1a2e;
      color: #c8d6e5;
      padding: 50px 0 30px;
      margin-top: 20px;
    }
    .footer-inner {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
      gap: 36px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-col p, .footer-col a {
      font-size: 0.86rem;
      color: #a0b4c8;
      line-height: 1.8;
      display: block;
    }
    .footer-col a:hover {
      color: #fff;
    }
    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-bottom {
      margin-top: 36px;
      padding-top: 22px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.78rem;
      color: #7d93aa;
    }
    .footer-qrcode {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .footer-qrcode img {
      width: 72px;
      height: 72px;
      border-radius: 12px;
      object-fit: cover;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .footer-qrcode span {
      font-size: 0.8rem;
    }
    @media (max-width: 900px) {
      .footer-inner {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 540px) {
      .footer-inner {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }
    /* 浮动按钮 */
    .float-actions {
      position: fixed;
      right: 24px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 80;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #fff;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--line);
      color: var(--ink-700);
      font-size: 1.1rem;
      cursor: pointer;
      transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    }
    .float-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px rgba(0, 194, 255, 0.25);
      background: #f8fcff;
    }
    .float-btn.top-btn {
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s, transform 0.2s;
    }
    .float-btn.top-btn.visible {
      opacity: 1;
      pointer-events: auto;
    }
    /* 服务网络/时间线 */
    .network-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
    }
    .network-item {
      background: #fff;
      border-radius: var(--radius-sm);
      padding: 20px;
      border: 1px solid var(--line);
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .network-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #00c2ff;
      box-shadow: 0 0 12px rgba(0, 194, 255, 0.6);
      flex-shrink: 0;
    }
    .network-item span {
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--ink-900);
    }
    .network-item small {
      display: block;
      font-weight: 400;
      font-size: 0.78rem;
      color: var(--ink-300);
    }
    @media (max-width: 700px) {
      .network-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 文章列表 */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #fff;
      border-radius: 14px;
      padding: 16px 20px;
      border: 1px solid var(--line);
      transition: background 0.2s, border 0.2s;
    }
    .article-item:hover {
      background: #fafdff;
      border-color: rgba(0, 194, 255, 0.3);
    }
    .article-item a {
      font-weight: 500;
      color: var(--ink-700);
      font-size: 0.9rem;
    }
    .article-item a:hover {
      color: #005a9e;
    }
    .article-date {
      font-size: 0.76rem;
      color: var(--ink-300);
    }
    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .tag-cloud span {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 30px;
      padding: 6px 16px;
      font-size: 0.8rem;
      color: var(--ink-500);
      transition: background 0.2s, border 0.2s;
    }
    .tag-cloud span:hover {
      background: #eef7ff;
      border-color: var(--cyan);
    }
    /* 滚动渐入 */
    .fade-in {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }