:root {
      --bg-main: #f8fafc;
      --bg-alt: #f1f5f9;
      --card-bg: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --border-color: #e2e8f0;
      
      --neon-cyan: #06b6d4;
      --neon-purple: #8b5cf6;
      --neon-pink: #ec4899;
      --neon-blue: #3b82f6;

      --neon-glow: 0 10px 25px -5px rgba(139, 92, 246, 0.18), 0 8px 10px -6px rgba(6, 182, 212, 0.15);
      --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
      --card-shadow-hover: 0 16px 24px -6px rgba(15, 23, 42, 0.08), 0 8px 16px -4px rgba(139, 92, 246, 0.12);
      
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      max-width: 100%;
      display: block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-link-item {
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
      transition: color 0.2s, background-color 0.2s;
    }

    .nav-link-item:hover {
      color: var(--neon-purple);
      background-color: rgba(139, 92, 246, 0.05);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-neon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      color: #ffffff;
      background: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 50%, #ec4899 100%);
      border: none;
      border-radius: var(--radius-full);
      box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
      cursor: pointer;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      white-space: nowrap;
    }

    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45);
      color: #ffffff;
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      transition: all 0.2s ease;
      white-space: nowrap;
    }

    .btn-outline:hover {
      border-color: var(--neon-purple);
      color: var(--neon-purple);
      background: rgba(139, 92, 246, 0.04);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-btn span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--text-main);
      margin: 4px 0;
      transition: 0.3s;
    }

    /* 区域统一标准 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background-color: var(--bg-alt);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--neon-purple);
      background: rgba(139, 92, 246, 0.08);
      border: 1px solid rgba(139, 92, 246, 0.2);
      border-radius: var(--radius-full);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 90px 0 70px;
      background: radial-gradient(circle at 50% 0%, rgba(6, 182, 212, 0.08) 0%, rgba(139, 92, 246, 0.08) 35%, rgba(248, 250, 252, 0) 70%), var(--bg-main);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      font-size: 13px;
      font-weight: 600;
      color: #0f172a;
      background: #ffffff;
      border: 1px solid rgba(139, 92, 246, 0.3);
      border-radius: var(--radius-full);
      box-shadow: 0 2px 8px rgba(139, 92, 246, 0.1);
      margin-bottom: 24px;
    }

    .hero-badge .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--neon-cyan);
      box-shadow: 0 0 8px var(--neon-cyan);
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #0284c7, #7c3aed, #db2777);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

    .hero-cta {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 48px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .metric-card {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      text-align: center;
      position: relative;
      overflow: hidden;
      transition: transform 0.25s ease;
    }

    .metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple), var(--neon-pink));
    }

    .metric-card:hover {
      transform: translateY(-4px);
    }

    .metric-val {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .metric-lab {
      font-size: 14px;
      color: var(--text-sub);
    }

    /* 平台矩阵与模型支持 */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-pill {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      box-shadow: 0 1px 3px rgba(0,0,0,0.02);
      transition: all 0.2s;
    }

    .model-pill:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(6, 182, 212, 0.2);
    }

    /* 服务能力卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .service-card {
      background: #ffffff;
      padding: 30px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
      border-color: rgba(139, 92, 246, 0.4);
    }

    .service-badge {
      align-self: flex-start;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
      background: rgba(6, 182, 212, 0.1);
      color: #0891b2;
      margin-bottom: 16px;
    }

    .service-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .service-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .service-list {
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
      font-size: 13px;
      color: var(--text-sub);
    }

    .service-list li {
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .service-list li::before {
      content: "•";
      color: var(--neon-purple);
      font-weight: bold;
    }

    /* 案例与素材图 */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .showcase-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }

    .showcase-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 10;
      background: #e2e8f0;
      overflow: hidden;
    }

    .showcase-img-wrap.square {
      aspect-ratio: 1 / 1;
    }

    .showcase-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .showcase-card:hover .showcase-img-wrap img {
      transform: scale(1.04);
    }

    .showcase-body {
      padding: 20px;
      flex-grow: 1;
    }

    .showcase-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .showcase-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 评测对比表格 */
    .compare-container {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 30px;
      box-shadow: var(--card-shadow);
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.06), rgba(139, 92, 246, 0.08));
      padding: 20px 24px;
      border-radius: var(--radius-md);
      margin-bottom: 24px;
      border: 1px solid rgba(139, 92, 246, 0.2);
    }

    .rating-item {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 18px;
      font-weight: 700;
    }

    .rating-score {
      font-size: 32px;
      font-weight: 900;
      color: var(--neon-purple);
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .compare-table th {
      background-color: var(--bg-alt);
      color: var(--text-main);
      font-weight: 700;
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .badge-highlight {
      font-weight: 700;
      color: #059669;
      background: #ecfdf5;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      display: inline-block;
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      position: relative;
    }

    .step-num {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      box-shadow: 0 4px 10px rgba(139, 92, 246, 0.3);
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Token 比价卡片 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .token-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 30px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .token-card.featured {
      border: 2px solid var(--neon-purple);
      box-shadow: var(--neon-glow);
    }

    .token-featured-tag {
      position: absolute;
      top: 16px;
      right: 16px;
      background: linear-gradient(135deg, var(--neon-purple), var(--neon-pink));
      color: #ffffff;
      font-size: 11px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: var(--radius-full);
    }

    .token-price {
      font-size: 34px;
      font-weight: 900;
      color: var(--text-main);
      margin: 16px 0 8px;
    }

    .token-price span {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-sub);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-item.active {
      border-color: var(--neon-purple);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      color: var(--text-main);
    }

    .faq-icon {
      font-size: 18px;
      font-weight: 400;
      color: var(--neon-purple);
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background-color: #fafbfd;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      padding: 0 22px 18px 22px;
      max-height: 250px;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .author-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-role {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 表单与需求接入 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--card-shadow);
    }

    .contact-info {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-card-box {
      margin-top: 24px;
      padding: 20px;
      border-radius: var(--radius-md);
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
    }

    .qr-container {
      margin-top: 14px;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-container img {
      width: 100px;
      height: 100px;
      object-fit: cover;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: #fdfdfd;
      color: var(--text-main);
      transition: border-color 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--neon-purple);
      box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 行业资讯与文章 */
    .articles-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      box-shadow: var(--card-shadow);
    }

    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-link-item {
      padding: 8px 14px;
      background: var(--bg-alt);
      border-radius: var(--radius-sm);
      font-size: 13px;
      color: var(--neon-purple);
      font-weight: 500;
      border: 1px solid var(--border-color);
    }

    .article-link-item:hover {
      background: #ffffff;
      border-color: var(--neon-purple);
    }

    /* 宣传图展示 */
    .banner-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 30px;
    }

    .banner-item {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      background: #ffffff;
    }

    .banner-item img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    /* 友情链接与通用页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px 0;
      color: var(--text-muted);
    }

    .footer-inner {
      display: flex;
      flex-direction: column;
      gap: 30px;
    }

    .friend-links-box {
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 24px;
    }

    .friend-links-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      font-size: 13px;
      color: var(--text-muted);
    }

    .friend-links-list a:hover {
      color: var(--neon-purple);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-kefu-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(139, 92, 246, 0.4);
      cursor: pointer;
      font-size: 13px;
      font-weight: 700;
      transition: transform 0.2s ease;
      border: none;
    }

    .float-kefu-btn:hover {
      transform: scale(1.08);
    }

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .grid-4, .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .showcase-grid, .token-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-container {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 34px;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05);
      }

      .nav-links.active {
        display: flex;
      }

      .nav-link-item {
        width: 100%;
        padding: 10px 0;
      }

      .mobile-menu-btn {
        display: block;
      }

      .hero-title {
        font-size: 28px;
      }

      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }

      .grid-3, .grid-4, .steps-grid, .showcase-grid, .token-grid, .reviews-grid, .banner-grid {
        grid-template-columns: 1fr;
      }

      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }