* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background: #f8faff;
      color: #1a1e2b;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 霓虹亮彩风基调 */
    :root {
      --primary: #0055ff;
      --primary-light: #3b82f6;
      --primary-glow: #a5c9ff;
      --accent: #ff3b7f;
      --accent-light: #ff7aa5;
      --bg-soft: #eef4ff;
      --card-white: #ffffff;
      --text-dark: #0b1426;
      --text-gray: #4a5170;
      --border-light: rgba(0, 85, 255, 0.12);
      --shadow-sm: 0 8px 24px rgba(0, 85, 255, 0.06);
      --shadow-md: 0 16px 40px rgba(0, 85, 255, 0.10);
      --shadow-glow: 0 0 30px rgba(59, 130, 246, 0.18);
      --radius-md: 20px;
      --radius-lg: 28px;
      --radius-sm: 12px;
    }
    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-light);
      padding: 10px 0;
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-area .ai-page-logo {
      max-height: 42px;
      width: auto;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
      list-style: none;
    }
    .nav-links li {
      margin: 0 2px;
    }
    .nav-links a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-dark);
      text-decoration: none;
      border-radius: 40px;
      transition: background 0.2s, color 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      background: var(--bg-soft);
      color: var(--primary);
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-outline, .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: 60px;
      font-weight: 600;
      font-size: 15px;
      text-decoration: none;
      transition: all 0.25s ease;
      border: none;
      cursor: pointer;
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: #fff;
      box-shadow: var(--shadow-glow);
    }
    .btn-primary {
      background: linear-gradient(110deg, #0055ff, #8b5cf6);
      color: #fff;
      box-shadow: 0 6px 20px rgba(0, 85, 255, 0.28);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(0, 85, 255, 0.38);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 28px;
      line-height: 1;
      color: var(--text-dark);
      cursor: pointer;
      padding: 4px 8px;
    }
    /* Hero 首屏（无图片） */
    .hero {
      position: relative;
      padding: 60px 0 70px;
      background: radial-gradient(circle at 30% 20%, #d9e8ff 0%, transparent 45%),
                  radial-gradient(circle at 80% 80%, #ffe0eb 0%, transparent 50%),
                  #f8faff;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background-image: linear-gradient(rgba(0,85,255,0.03) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(0,85,255,0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
    }
    .hero h1 {
      font-size: clamp(2.2rem, 6vw, 3.8rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
      color: #0b1426;
      margin-bottom: 24px;
    }
    .hero h1 span {
      background: linear-gradient(120deg, #0055ff 20%, #b83bff 80%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero-desc {
      font-size: 1.2rem;
      color: var(--text-gray);
      max-width: 660px;
      margin-bottom: 36px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
      margin-bottom: 50px;
    }
    .btn-large {
      padding: 16px 38px;
      font-size: 17px;
      border-radius: 60px;
    }
    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 28px 48px;
    }
    .stat-item {
      display: flex;
      flex-direction: column;
    }
    .stat-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-gray);
      font-weight: 500;
    }
    /* 通用板块 */
    .section {
      padding: 72px 0;
    }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .section-tag {
      display: inline-block;
      padding: 6px 18px;
      background: rgba(0, 85, 255, 0.08);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 40px;
      letter-spacing: 0.5px;
      margin-bottom: 16px;
    }
    .section-title {
      font-size: clamp(1.8rem, 4vw, 2.6rem);
      font-weight: 700;
      letter-spacing: -0.02em;
      color: #0b1426;
      margin-bottom: 14px;
    }
    .section-sub {
      font-size: 1.05rem;
      color: var(--text-gray);
    }
    /* 卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 28px;
    }
    .card {
      background: var(--card-white);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md), var(--shadow-glow);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 16px;
      background: linear-gradient(135deg, #e0edff, #c7dcff);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }
    .card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #0b1426;
    }
    .card p {
      color: var(--text-gray);
      font-size: 0.95rem;
    }
    /* 平台介绍 */
    .intro-panel {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .intro-text h2 {
      font-size: 2.2rem;
      font-weight: 700;
      color: #0b1426;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }
    .intro-text p {
      color: var(--text-gray);
      font-size: 1.05rem;
      margin-bottom: 28px;
    }
    .intro-list {
      list-style: none;
    }
    .intro-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 0;
      color: #1a1e2b;
      font-weight: 500;
      border-bottom: 1px solid rgba(0,0,0,0.04);
    }
    .intro-list li::before {
      content: '⚡';
      font-size: 1.1rem;
    }
    .intro-badge {
      display: flex;
      flex-direction: column;
      gap: 18px;
      background: linear-gradient(145deg, #f0f7ff, #e2edff);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      border: 1px solid rgba(0, 85, 255, 0.15);
    }
    .intro-badge-item {
      display: flex;
      align-items: center;
      gap: 16px;
      font-weight: 600;
      color: #0b1426;
    }
    .intro-badge-item span {
      font-size: 1.8rem;
    }
    /* 服务能力卡片区（多种样式） */
    .service-alt {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      border-left: 4px solid var(--primary);
    }
    /* 流程步骤 */
    .steps-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 18px;
    }
    .step-item {
      flex: 1 1 180px;
      text-align: center;
      background: #fff;
      border-radius: var(--radius-md);
      padding: 28px 16px;
      border: 1px solid var(--border-light);
      transition: 0.3s;
    }
    .step-item:hover {
      border-color: var(--primary-light);
      box-shadow: var(--shadow-sm);
    }
    .step-num {
      display: inline-block;
      width: 44px;
      height: 44px;
      line-height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), #7c3aed);
      color: #fff;
      font-weight: 700;
      font-size: 1.2rem;
      margin-bottom: 16px;
    }
    .step-item h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }
    .step-item p {
      font-size: 0.9rem;
      color: var(--text-gray);
    }
    /* 对比表格 */
    .table-responsive {
      overflow-x: auto;
      background: #fff;
      border-radius: var(--radius-md);
      padding: 8px;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 700px;
    }
    .compare-table th {
      background: #f0f5ff;
      color: #0b1426;
      font-weight: 700;
      padding: 18px 16px;
      text-align: left;
      font-size: 1rem;
      border-bottom: 2px solid var(--primary-light);
    }
    .compare-table td {
      padding: 16px;
      border-bottom: 1px solid #e9eef9;
      color: var(--text-gray);
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table .highlight {
      color: var(--primary);
      font-weight: 700;
    }
    /* 评分卡 */
    .score-card {
      display: flex;
      align-items: center;
      gap: 24px;
      flex-wrap: wrap;
      background: linear-gradient(115deg, #ffffff, #f2f8ff);
      border-radius: var(--radius-md);
      padding: 24px 32px;
      margin-bottom: 24px;
      border: 1px solid rgba(0, 85, 255, 0.2);
    }
    .score-num {
      font-size: 3.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
    }
    .stars {
      color: #ffb800;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }
    /* FAQ 手风琴 */
    .faq-grid {
      display: grid;
      gap: 12px;
      max-width: 880px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border-radius: var(--radius-sm);
      border: 1px solid #e3edff;
      overflow: hidden;
      transition: box-shadow 0.2s;
    }
    .faq-item.active {
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 24px;
      font-weight: 600;
      font-size: 1.05rem;
      cursor: pointer;
      background: #fff;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: #f6faff;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 24px;
      color: var(--text-gray);
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #fbfdff;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }
    /* 评论卡片 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }
    .review-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 26px 22px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(0, 85, 255, 0.06);
      transition: 0.3s;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .review-head {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 18px;
    }
    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, #b4d0ff, #e2eeff);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 1.1rem;
    }
    .review-name {
      font-weight: 600;
    }
    .review-role {
      font-size: 0.85rem;
      color: var(--text-gray);
    }
    .review-text {
      color: var(--text-gray);
      font-size: 0.95rem;
      line-height: 1.6;
    }
    /* 案例展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 28px;
    }
    .case-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: 0.3s;
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .case-img-wrap {
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #f0f4ff;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.03);
    }
    .case-info {
      padding: 20px;
    }
    .case-info h4 {
      font-size: 1.1rem;
      margin-bottom: 6px;
    }
    .case-info p {
      font-size: 0.9rem;
      color: var(--text-gray);
    }
    /* 文章列表 */
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 24px;
      background: #fff;
      border-radius: var(--radius-sm);
      border: 1px solid #e3edff;
      transition: 0.2s;
      text-decoration: none;
      color: inherit;
    }
    .article-item:hover {
      border-color: var(--primary-light);
      background: #f6faff;
    }
    .article-title {
      font-weight: 500;
      color: #0b1426;
    }
    .article-arrow {
      color: var(--primary);
      font-weight: 700;
    }
    /* 表单 */
    .form-card {
      background: #fff;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(0, 85, 255, 0.1);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-weight: 600;
      margin-bottom: 8px;
      color: #0b1426;
      font-size: 0.95rem;
    }
    .form-group input, .form-group select, .form-group textarea {
      width: 100%;
      padding: 14px 16px;
      border: 1.5px solid #dce8ff;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      background: #fbfdff;
      transition: border 0.2s, box-shadow 0.2s;
      font-family: inherit;
    }
    .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(0, 85, 255, 0.1);
    }
    .form-group textarea {
      min-height: 110px;
      resize: vertical;
    }
    /* Token比价 & 标签云 */
    .token-panel {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }
    .token-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 22px;
      border: 1px solid #e3edff;
      text-align: center;
    }
    .token-card .model-name {
      font-weight: 700;
      margin-bottom: 10px;
    }
    .token-price {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--primary);
    }
    .token-vs {
      font-size: 0.9rem;
      color: var(--text-gray);
      text-decoration: line-through;
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px 14px;
      margin-top: 20px;
    }
    .tag {
      background: #eef4ff;
      color: #1d4ed8;
      font-size: 0.88rem;
      padding: 6px 16px;
      border-radius: 40px;
      font-weight: 500;
    }
    /* 页脚 */
    .site-footer {
      background: #0b1426;
      color: #ccd9f0;
      padding: 48px 0 28px;
      margin-top: 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 36px;
    }
    .footer-brand p {
      margin-top: 16px;
      font-size: 0.92rem;
      color: #9bb3d9;
    }
    .footer-col h4 {
      color: #fff;
      font-size: 1.05rem;
      margin-bottom: 16px;
      font-weight: 600;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col li {
      margin-bottom: 10px;
    }
    .footer-col a {
      color: #9bb3d9;
      text-decoration: none;
      font-size: 0.92rem;
      transition: color 0.2s;
    }
    .footer-col a:hover {
      color: #fff;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: #6f8ab0;
    }
    .footer-bottom a {
      color: #9bb3d9;
      text-decoration: none;
    }
    .qrcode-wrap img {
      max-width: 120px;
      border-radius: 10px;
      border: 2px solid rgba(255,255,255,0.15);
    }
    /* 浮动客服 */
    .float-kf {
      position: fixed;
      right: 24px;
      bottom: 100px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      background: #fff;
      padding: 14px 12px;
      border-radius: 60px;
      box-shadow: 0 12px 32px rgba(0, 40, 100, 0.18);
      cursor: pointer;
      transition: 0.3s;
      text-decoration: none;
      color: var(--text-dark);
    }
    .float-kf:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 40px rgba(0, 85, 255, 0.28);
    }
    .float-kf img {
      width: 100px;
      height: auto;
      border-radius: 8px;
    }
    .float-kf span {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--primary);
    }
    .back-top {
      position: fixed;
      right: 28px;
      bottom: 32px;
      z-index: 99;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #fff;
      border: 1px solid var(--border-light);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
      font-size: 1.2rem;
      cursor: pointer;
      box-shadow: var(--shadow-sm);
      transition: 0.2s;
    }
    .back-top:hover {
      background: var(--primary);
      color: #fff;
    }
    /* 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);
    }
    @media (max-width: 1024px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 820px) {
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        padding: 16px 0;
        gap: 8px;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        margin: 0;
      }
      .nav-links a {
        display: block;
        padding: 10px 16px;
      }
      .menu-toggle {
        display: block;
      }
      .nav-cta .btn-outline {
        display: none;
      }
      .logo-area .ai-page-logo {
        max-height: 34px;
      }
      .intro-panel {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .hero {
        padding: 40px 0 50px;
      }
    }
    @media (max-width: 600px) {
      .container {
        padding: 0 18px;
      }
      .section {
        padding: 48px 0;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-card {
        padding: 24px 18px;
      }
      .float-kf {
        right: 14px;
        bottom: 80px;
        padding: 10px;
      }
      .float-kf img {
        width: 70px;
      }
      .back-top {
        right: 18px;
        bottom: 24px;
        width: 42px;
        height: 42px;
      }
      .btn-outline, .btn-primary {
        padding: 8px 18px;
        font-size: 14px;
      }
      .btn-large {
        padding: 14px 24px;
        font-size: 15px;
      }
    }