* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
      background: #f9faff;
      color: #1a1e2b;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 霓虹亮彩风 主视觉 */
    .neon-glow {
      background: linear-gradient(135deg, #ffffff 0%, #f4f7ff 100%);
      position: relative;
    }
    .neon-glow::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 20% 30%, rgba(0, 200, 255, 0.12), transparent 50%),
                  radial-gradient(circle at 80% 70%, rgba(180, 0, 255, 0.10), transparent 55%);
      pointer-events: none;
      z-index: 0;
    }
    header, main, footer {
      position: relative;
      z-index: 1;
    }

    /* 导航 */
    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 18px 0;
      border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .ai-page-logo {
      max-height: 40px;
      width: auto;
    }
    .brand-text {
      font-weight: 700;
      font-size: 1.4rem;
      letter-spacing: -0.5px;
      background: linear-gradient(135deg, #0055ff, #a000ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
      list-style: none;
    }
    .nav-links li a {
      display: inline-block;
      padding: 8px 16px;
      font-size: 0.95rem;
      font-weight: 500;
      color: #2d2f3a;
      text-decoration: none;
      border-radius: 8px;
      transition: color 0.2s, background 0.2s;
    }
    .nav-links li a:hover {
      color: #0055ff;
      background: rgba(0, 85, 255, 0.06);
    }
    .nav-cta {
      margin-left: 16px;
      white-space: nowrap;
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      background: linear-gradient(135deg, #0055ff, #7b2ff7);
      color: #ffffff !important;
      font-weight: 600;
      border: none;
      border-radius: 50px;
      text-decoration: none;
      font-size: 0.95rem;
      letter-spacing: 0.3px;
      transition: transform 0.2s, box-shadow 0.25s;
      box-shadow: 0 6px 18px rgba(0, 85, 255, 0.25);
      cursor: pointer;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(0, 85, 255, 0.35);
    }
    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 11px 26px;
      background: transparent;
      color: #1a1e2b;
      font-weight: 600;
      border: 1.5px solid #d0d8f0;
      border-radius: 50px;
      text-decoration: none;
      transition: border-color 0.2s, background 0.2s;
    }
    .btn-outline:hover {
      border-color: #0055ff;
      background: rgba(0, 85, 255, 0.03);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      cursor: pointer;
      color: #1a1e2b;
    }

    /* HERO 首屏——无图片 */
    .hero {
      padding: 60px 0 72px;
      position: relative;
    }
    .hero-content {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-block;
      background: rgba(0, 85, 255, 0.08);
      color: #0055ff;
      font-weight: 600;
      font-size: 0.85rem;
      padding: 8px 20px;
      border-radius: 50px;
      margin-bottom: 22px;
      letter-spacing: 0.3px;
      border: 1px solid rgba(0, 85, 255, 0.15);
      backdrop-filter: blur(4px);
    }
    .hero h1 {
      font-size: clamp(2.2rem, 5.5vw, 3.8rem);
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -1px;
      color: #0a0c14;
      margin-bottom: 20px;
    }
    .hero h1 span {
      background: linear-gradient(135deg, #0055ff, #a000ff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: #4a4f63;
      max-width: 720px;
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      margin-bottom: 48px;
    }
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      width: 100%;
      max-width: 800px;
      margin-top: 8px;
    }
    .stat-item {
      background: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.8);
      padding: 20px 12px;
      border-radius: 20px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.02);
      transition: transform 0.25s;
    }
    .stat-item:hover {
      transform: translateY(-4px);
    }
    .stat-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: #0055ff;
      line-height: 1.2;
    }
    .stat-label {
      font-size: 0.85rem;
      color: #5a5f73;
      font-weight: 500;
    }

    /* 通用区块 */
    .section {
      padding: 72px 0;
    }
    .section-header {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 48px;
    }
    .section-tag {
      display: inline-block;
      color: #0055ff;
      font-weight: 600;
      font-size: 0.85rem;
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 12px;
      background: rgba(0, 85, 255, 0.06);
      padding: 4px 16px;
      border-radius: 50px;
    }
    .section-header h2 {
      font-size: clamp(1.8rem, 3.5vw, 2.6rem);
      font-weight: 700;
      color: #0a0c14;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-header p {
      font-size: 1.05rem;
      color: #5a5f73;
    }

    /* 卡片网格 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 24px;
    }
    .card {
      background: #ffffff;
      border-radius: 24px;
      padding: 28px 24px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
      border: 1px solid #eef1fa;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      position: relative;
      overflow: hidden;
    }
    .card::after {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 100% 0%, rgba(0, 85, 255, 0.03), transparent 60%);
      pointer-events: none;
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 40px rgba(0, 85, 255, 0.08);
      border-color: #d0deff;
    }
    .card-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 48px;
      height: 48px;
      border-radius: 14px;
      background: rgba(0, 85, 255, 0.08);
      margin-bottom: 18px;
      color: #0055ff;
      font-weight: 700;
      font-size: 1.3rem;
    }
    .card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #0a0c14;
    }
    .card p {
      font-size: 0.95rem;
      color: #5a5f73;
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 流程步骤 */
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 16px;
    }
    .step {
      background: #ffffff;
      border-radius: 20px;
      padding: 24px 20px;
      text-align: center;
      border: 1px solid #eef1fa;
      transition: transform 0.25s;
    }
    .step:hover {
      transform: translateY(-4px);
    }
    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0055ff, #a000ff);
      color: #ffffff;
      font-weight: 700;
      font-size: 1.2rem;
      margin-bottom: 16px;
    }
    .step h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }
    .step p {
      font-size: 0.9rem;
      color: #5a5f73;
    }

    /* 对比表格 */
    .table-wrap {
      overflow-x: auto;
      border-radius: 20px;
      border: 1px solid #eef1fa;
      background: #ffffff;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.02);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.95rem;
      min-width: 700px;
    }
    .compare-table th {
      background: #f6f9ff;
      text-align: left;
      padding: 18px 20px;
      font-weight: 700;
      color: #0a0c14;
      border-bottom: 1px solid #e0e8f5;
    }
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f0f3fc;
      color: #2d2f3a;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .rating-stars {
      color: #ffb800;
      letter-spacing: 2px;
      font-size: 1.1rem;
    }
    .score-highlight {
      font-size: 1.8rem;
      font-weight: 800;
      color: #0055ff;
    }

    /* FAQ */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid #eef1fa;
      padding: 4px 0;
    }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      text-align: left;
      padding: 20px 0;
      font-size: 1.05rem;
      font-weight: 600;
      color: #0a0c14;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: color 0.2s;
    }
    .faq-question:hover {
      color: #0055ff;
    }
    .faq-question::after {
      content: '+';
      font-size: 1.6rem;
      font-weight: 300;
      transition: transform 0.25s;
      color: #0055ff;
    }
    .faq-item.active .faq-question::after {
      content: '−';
      transform: rotate(0deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s;
      color: #5a5f73;
      font-size: 0.95rem;
      line-height: 1.7;
      padding-right: 30px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }

    /* 用户评论 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border-radius: 20px;
      padding: 24px;
      border: 1px solid #eef1fa;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px rgba(0, 0, 0, 0.04);
    }
    .review-stars {
      color: #ffb800;
      margin-bottom: 12px;
    }
    .review-text {
      font-size: 0.95rem;
      color: #3a3f52;
      margin-bottom: 18px;
      line-height: 1.7;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #e0e8ff, #c2d4ff);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0055ff;
      font-weight: 700;
    }
    .review-name {
      font-weight: 600;
      font-size: 0.9rem;
    }
    .review-role {
      font-size: 0.8rem;
      color: #7a8099;
    }

    /* 表单 */
    .form-card {
      background: #ffffff;
      border-radius: 28px;
      padding: 40px;
      border: 1px solid #eef1fa;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.02);
      max-width: 800px;
      margin: 0 auto;
    }
    .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-weight: 600;
      font-size: 0.9rem;
      color: #1a1e2b;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 14px 16px;
      border: 1.5px solid #e0e8f5;
      border-radius: 14px;
      font-size: 0.95rem;
      font-family: inherit;
      background: #fafbff;
      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: #0055ff;
      box-shadow: 0 0 0 3px rgba(0, 85, 255, 0.1);
      background: #ffffff;
    }
    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }
    .form-submit {
      margin-top: 12px;
      width: 100%;
    }

    /* 文章列表 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 20px;
    }
    .article-card {
      background: #ffffff;
      border-radius: 18px;
      padding: 22px;
      border: 1px solid #eef1fa;
      transition: transform 0.2s, border-color 0.2s;
      text-decoration: none;
      color: inherit;
      display: block;
    }
    .article-card:hover {
      transform: translateY(-3px);
      border-color: #c2d4ff;
    }
    .article-tag {
      font-size: 0.75rem;
      font-weight: 600;
      color: #0055ff;
      background: rgba(0, 85, 255, 0.06);
      padding: 4px 12px;
      border-radius: 50px;
      display: inline-block;
      margin-bottom: 10px;
    }
    .article-title {
      font-weight: 600;
      font-size: 1rem;
      color: #0a0c14;
      margin-bottom: 6px;
    }
    .article-desc {
      font-size: 0.85rem;
      color: #7a8099;
    }

    /* 友情链接 */
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px 24px;
      justify-content: center;
      padding: 32px 0;
    }
    .friend-links a {
      color: #5a5f73;
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s;
    }
    .friend-links a:hover {
      color: #0055ff;
    }

    /* footer */
    .footer {
      background: #0f1220;
      color: #b0b6cc;
      padding: 56px 0 28px;
      margin-top: 32px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer h4 {
      color: #ffffff;
      font-weight: 600;
      margin-bottom: 16px;
      font-size: 1rem;
    }
    .footer p {
      font-size: 0.9rem;
      line-height: 1.7;
      color: #9aa1bb;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: #9aa1bb;
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 0.9rem;
      color: #9aa1bb;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #6a718b;
    }
    .footer-qr {
      max-width: 100px;
      border-radius: 12px;
      margin-top: 12px;
    }

    /* 浮动客服 */
    .floating-contact {
      position: fixed;
      bottom: 28px;
      right: 28px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
      align-items: center;
    }
    .float-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0055ff, #7b2ff7);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      box-shadow: 0 8px 20px rgba(0, 85, 255, 0.3);
      cursor: pointer;
      border: none;
      transition: transform 0.2s;
      text-decoration: none;
    }
    .float-btn:hover {
      transform: scale(1.08);
    }

    /* 动画 */
    .fade-up {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        padding: 16px 0;
        background: #ffffff;
        border-radius: 16px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
        position: absolute;
        top: 70px;
        left: 0;
        z-index: 100;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 12px 24px;
      }
      .menu-toggle {
        display: block;
      }
      .navbar {
        position: relative;
      }
      .nav-cta {
        display: none;
      }
      .hero {
        padding: 40px 0 48px;
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .section {
        padding: 48px 0;
      }
      .form-card {
        padding: 24px;
      }
      .compare-table {
        min-width: 600px;
      }
    }
    @media (max-width: 480px) {
      .hero-stats {
        grid-template-columns: 1fr;
      }
      .steps {
        grid-template-columns: 1fr;
      }
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .hero-actions a {
        width: 100%;
        justify-content: center;
      }
    }