:root {
      --bg-base: #0a0e1a;
      --bg-surface: #121829;
      --bg-card: rgba(23, 32, 54, 0.7);
      --border-color: rgba(0, 242, 254, 0.15);
      --border-bright: rgba(0, 242, 254, 0.4);
      --neon-cyan: #00f2fe;
      --neon-purple: #9d4edd;
      --neon-pink: #f72585;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --container-max: 1200px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(circle at 15% 10%, rgba(157, 78, 221, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 30%, rgba(0, 242, 254, 0.1) 0%, transparent 45%),
        radial-gradient(circle at 50% 80%, rgba(247, 37, 133, 0.08) 0%, transparent 50%);
      background-attachment: fixed;
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 14, 26, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.5px;
    }

    .brand-title span {
      color: var(--neon-cyan);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: 6px;
      transition: var(--transition);
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--neon-cyan);
      background: rgba(0, 242, 254, 0.06);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-size: 0.95rem;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
    }

    .btn-neon-primary {
      background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
      color: #050b14;
      box-shadow: 0 0 16px rgba(0, 242, 254, 0.35);
    }

    .btn-neon-primary:hover {
      box-shadow: 0 0 24px rgba(0, 242, 254, 0.6);
      transform: translateY(-2px);
    }

    .btn-outline {
      border-color: var(--neon-purple);
      color: #e2e8f0;
      background: rgba(157, 78, 221, 0.1);
    }

    .btn-outline:hover {
      background: rgba(157, 78, 221, 0.25);
      border-color: #b5179e;
      transform: translateY(-2px);
    }

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

    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 区块通用 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px auto;
    }

    .badge-tag {
      display: inline-block;
      padding: 4px 14px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid rgba(0, 242, 254, 0.3);
      color: var(--neon-cyan);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 16px;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: #fff;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
    }

    /* Hero 首屏 (无任何图片) */
    .hero-section {
      padding: 100px 0 80px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(157, 78, 221, 0.12);
      border: 1px solid rgba(157, 78, 221, 0.35);
      border-radius: 30px;
      color: #d8b4fe;
      font-size: 0.9rem;
      margin-bottom: 24px;
    }

    .hero-h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #ffffff;
      text-shadow: 0 0 30px rgba(0, 242, 254, 0.2);
    }

    .hero-h1 span {
      background: linear-gradient(90deg, #00f2fe 0%, #f72585 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      font-size: 1.2rem;
      color: #cbd5e1;
      max-width: 820px;
      margin: 0 auto 36px auto;
      line-height: 1.8;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-hero-official {
      padding: 14px 36px;
      font-size: 1.1rem;
      border-radius: 30px;
      background: linear-gradient(90deg, #00f2fe 0%, #7209b7 100%);
      color: #fff;
      text-decoration: none;
      font-weight: 700;
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.45);
      transition: var(--transition);
      border: 1px solid rgba(255, 255, 255, 0.3);
    }

    .btn-hero-official:hover {
      box-shadow: 0 0 35px rgba(247, 37, 133, 0.6);
      transform: translateY(-3px) scale(1.02);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px 16px;
      transition: var(--transition);
    }

    .stat-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-4px);
      box-shadow: 0 8px 20px rgba(0, 242, 254, 0.15);
    }

    .stat-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--neon-cyan);
      line-height: 1.2;
      margin-bottom: 6px;
      font-family: Consolas, monospace;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 平台核心能力介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .intro-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 30px;
      transition: var(--transition);
    }

    .intro-card:hover {
      border-color: var(--neon-purple);
      box-shadow: 0 10px 25px rgba(157, 78, 221, 0.2);
      transform: translateY(-4px);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(0, 242, 254, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--neon-cyan);
    }

    .intro-card h3 {
      font-size: 1.3rem;
      margin-bottom: 12px;
      color: #fff;
    }

    .intro-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* 场景卡片大网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .service-item:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 8px 24px rgba(0, 242, 254, 0.15);
      transform: translateY(-4px);
    }

    .service-title-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 14px;
    }

    .service-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
    }

    .service-badge {
      font-size: 0.75rem;
      padding: 2px 8px;
      background: rgba(247, 37, 133, 0.15);
      border: 1px solid rgba(247, 37, 133, 0.3);
      color: #f72585;
      border-radius: 12px;
    }

    .service-desc {
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.65;
      margin-bottom: 18px;
    }

    .service-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--neon-cyan);
      font-size: 0.85rem;
      text-decoration: none;
      font-weight: 600;
    }

    .service-link:hover {
      text-decoration: underline;
    }

    /* 模型矩阵展示 */
    .model-tags-wrapper {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      text-align: center;
    }

    .model-tags-title {
      font-size: 1.2rem;
      font-weight: 600;
      margin-bottom: 24px;
      color: #e2e8f0;
    }

    .model-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .chip {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: #cbd5e1;
      transition: var(--transition);
    }

    .chip:hover {
      background: rgba(0, 242, 254, 0.15);
      border-color: var(--neon-cyan);
      color: #fff;
    }

    /* 案例展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

    .case-card:hover {
      border-color: var(--border-bright);
      transform: translateY(-4px);
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #000;
    }

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

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }

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

    .case-info {
      padding: 20px;
    }

    .case-info h4 {
      font-size: 1.1rem;
      color: #fff;
      margin-bottom: 8px;
    }

    .case-info p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 标准流程时间线 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      position: relative;
    }

    .step-badge {
      font-size: 1.8rem;
      font-weight: 800;
      color: rgba(0, 242, 254, 0.4);
      margin-bottom: 12px;
      font-family: Consolas, monospace;
    }

    .step-card h4 {
      font-size: 1.15rem;
      color: #fff;
      margin-bottom: 10px;
    }

    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测表格 */
    .eval-score-card {
      background: linear-gradient(135deg, rgba(157, 78, 221, 0.15) 0%, rgba(0, 242, 254, 0.15) 100%);
      border: 1px solid var(--border-bright);
      border-radius: 16px;
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
    }

    .eval-left {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-circle {
      width: 90px;
      height: 90px;
      border-radius: 50%;
      background: #000;
      border: 3px solid var(--neon-cyan);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.35);
    }

    .score-val {
      font-size: 2rem;
      font-weight: 800;
      color: var(--neon-cyan);
      line-height: 1;
    }

    .score-max {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    .score-meta h3 {
      font-size: 1.4rem;
      color: #fff;
      margin-bottom: 6px;
    }

    .score-stars {
      color: #ffb703;
      font-size: 1.1rem;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      background: var(--bg-card);
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .eval-table th,
    .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .eval-table th {
      background: rgba(0, 242, 254, 0.05);
      color: #fff;
      font-weight: 600;
    }

    .eval-table td:nth-child(2) {
      color: var(--neon-cyan);
      font-weight: 600;
      background: rgba(0, 242, 254, 0.02);
    }

    .eval-table td:nth-child(3) {
      color: var(--text-muted);
    }

    /* 客户评价网格 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: #cbd5e1;
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-purple), var(--neon-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #fff;
    }

    .reviewer-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: #fff;
    }

    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 需求表单与加盟 */
    .form-agent-layout {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 30px;
    }

    .form-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
    }

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      color: #cbd5e1;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(10, 14, 26, 0.8);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      color: #fff;
      font-size: 0.95rem;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
    }

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    .agent-box {
      background: linear-gradient(135deg, rgba(23, 32, 54, 0.8) 0%, rgba(157, 78, 221, 0.15) 100%);
      border: 1px solid var(--border-bright);
      border-radius: 16px;
      padding: 36px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .agent-item {
      margin-bottom: 18px;
    }

    .agent-item h5 {
      font-size: 1.05rem;
      color: var(--neon-cyan);
      margin-bottom: 6px;
    }

    .agent-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 600;
      color: #fff;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--neon-cyan);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.7;
      transition: all 0.3s ease-out;
    }

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

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }

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

    /* 文章与快讯 */
    .articles-block {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 30px;
    }

    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .article-link-card {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: rgba(10, 14, 26, 0.6);
      padding: 14px 20px;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.05);
      color: #e2e8f0;
      text-decoration: none;
      transition: var(--transition);
    }

    .article-link-card:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      transform: translateX(4px);
    }

    /* 页脚 */
    footer.site-footer {
      background: #060911;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-brand p {
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.7;
      margin-top: 14px;
    }

    .footer-col h5 {
      color: #fff;
      font-size: 1.05rem;
      margin-bottom: 18px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      transition: var(--transition);
    }

    .footer-col ul li a:hover {
      color: var(--neon-cyan);
    }

    .contact-qr-wrap {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }

    .contact-qr-wrap img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      display: block;
    }

    .footer-links-row {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .footer-links-row a {
      color: var(--text-muted);
      text-decoration: none;
    }

    .footer-links-row a:hover {
      color: var(--neon-cyan);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 浮动组件 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--bg-surface);
      border: 1px solid var(--border-bright);
      color: var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
      cursor: pointer;
      transition: var(--transition);
    }

    .floating-btn:hover {
      background: var(--neon-cyan);
      color: #050b14;
      transform: scale(1.1);
    }

    /* 响应式样式 */
    @media (max-width: 1024px) {
      .services-grid,
      .intro-grid,
      .case-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .hero-h1 {
        font-size: 2.1rem;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid,
      .intro-grid,
      .case-grid,
      .reviews-grid,
      .flow-steps,
      .form-agent-layout,
      .footer-grid,
      .article-links-grid {
        grid-template-columns: 1fr;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-surface);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-actions .btn-outline {
        display: none;
      }
      .eval-score-card {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }
      .eval-left {
        flex-direction: column;
      }
    }