:root {
      --bg-main: #0b0716;
      --bg-card: rgba(26, 17, 43, 0.7);
      --bg-card-hover: rgba(41, 24, 69, 0.85);
      --neon-pink: #ff2a85;
      --neon-purple: #8a2be2;
      --neon-cyan: #00f0ff;
      --text-main: #f5f0ff;
      --text-muted: #a69ebd;
      --border-color: rgba(255, 42, 133, 0.25);
      --border-hover: rgba(0, 240, 255, 0.6);
      --glow-pink: 0 0 20px rgba(255, 42, 133, 0.35);
      --glow-purple: 0 0 25px rgba(138, 43, 226, 0.4);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --max-width: 1240px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 50% 0%, #260f38 0%, #0b0716 70%);
      background-attachment: fixed;
      overflow-x: hidden;
      min-height: 100vh;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 7, 22, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
      filter: drop-shadow(0 0 8px rgba(255, 42, 133, 0.6));
    }

    .brand-title {
      font-size: 1.35rem;
      font-weight: 800;
      background: linear-gradient(90deg, #fff, #ff2a85);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: 0.5px;
    }

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

    .nav-links li a {
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.95rem;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--neon-cyan);
      background: rgba(255, 255, 255, 0.05);
      text-shadow: 0 0 10px var(--neon-cyan);
    }

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

    .btn-cyber {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 0.95rem;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
      color: #ffffff;
      box-shadow: var(--glow-pink);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(255, 42, 133, 0.7);
      color: #ffffff;
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-main);
      border-color: var(--border-color);
    }

    .btn-secondary:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
    }

    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-main);
      font-size: 1.6rem;
      cursor: pointer;
      padding: 4px;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 90px 0 70px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 42, 133, 0.12);
      border: 1px solid var(--neon-pink);
      color: #ff7ebb;
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--glow-pink);
    }

    .hero-title {
      font-size: clamp(2.2rem, 5vw, 3.4rem);
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(120deg, #ffffff 20%, #ff6eb4 60%, #00f0ff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 18px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-actions .btn-cyber {
      padding: 14px 34px;
      font-size: 1.05rem;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(10px);
      transition: all 0.3s ease;
    }

    .stat-card:hover {
      border-color: var(--neon-pink);
      transform: translateY(-4px);
      box-shadow: var(--glow-pink);
    }

    .stat-value {
      font-size: 2rem;
      font-weight: 800;
      color: var(--neon-cyan);
      margin-bottom: 6px;
      font-family: monospace;
    }

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

    /* 公共区头 */
    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      text-transform: uppercase;
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      color: var(--neon-pink);
      display: block;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    section {
      padding: 70px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    /* 模块：平台介绍与关于我们 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-card-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--glow-purple);
    }

    .about-card-box h3 {
      font-size: 1.5rem;
      margin-bottom: 16px;
      color: var(--neon-cyan);
    }

    .about-card-box p {
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.75;
    }

    .feature-points {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-top: 24px;
    }

    .feature-points li {
      background: rgba(255, 255, 255, 0.03);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--neon-pink);
      font-size: 0.92rem;
    }

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

    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover img {
      transform: scale(1.03);
    }

    /* AIGC 服务与场景工坊 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: linear-gradient(to bottom, var(--neon-pink), var(--neon-purple));
      opacity: 0.7;
    }

    .service-card:hover {
      transform: translateY(-5px);
      border-color: var(--border-hover);
      box-shadow: 0 8px 24px rgba(0, 240, 255, 0.2);
    }

    .service-card h4 {
      font-size: 1.2rem;
      margin-bottom: 10px;
      color: #ffffff;
    }

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

    /* 模型矩阵徽章云 */
    .model-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-badge {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 42, 133, 0.3);
      padding: 8px 18px;
      border-radius: 20px;
      font-size: 0.9rem;
      color: #e5d8f6;
      transition: all 0.25s ease;
    }

    .model-badge:hover {
      background: var(--neon-purple);
      color: #fff;
      border-color: var(--neon-cyan);
      box-shadow: 0 0 12px var(--neon-purple);
    }

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

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

    .step-number {
      font-size: 2.2rem;
      font-weight: 900;
      color: rgba(255, 42, 133, 0.3);
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-card h4 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: #ffffff;
    }

    .step-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 对比评测板块 */
    .compare-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--glow-pink);
    }

    .score-summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      background: rgba(255, 42, 133, 0.08);
      border: 1px solid var(--neon-pink);
      padding: 20px 28px;
      border-radius: var(--radius-md);
      margin-bottom: 30px;
    }

    .score-left h3 {
      font-size: 1.4rem;
      color: #fff;
      margin-bottom: 4px;
    }

    .score-rating {
      font-size: 2.2rem;
      font-weight: 900;
      color: #ffd700;
      letter-spacing: 2px;
    }

    .score-rating span {
      font-size: 1.2rem;
      color: var(--text-muted);
    }

    .compare-table-wrapper {
      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 rgba(255, 255, 255, 0.08);
      font-size: 0.95rem;
    }

    .compare-table th {
      background: rgba(255, 255, 255, 0.04);
      color: var(--neon-cyan);
      font-weight: 700;
    }

    .compare-table td.highlight {
      color: #ff6eb4;
      font-weight: 700;
      background: rgba(255, 42, 133, 0.05);
    }

    /* 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: var(--radius-md);
      overflow: hidden;
    }

    .case-content {
      padding: 20px;
    }

    .case-content h4 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: #fff;
    }

    .case-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 客户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 24px;
    }

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

    .review-text {
      font-size: 0.92rem;
      color: #ded6ee;
      line-height: 1.7;
      margin-bottom: 16px;
      font-style: italic;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 12px;
    }

    .user-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(45deg, var(--neon-pink), var(--neon-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #fff;
    }

    .user-meta h5 {
      font-size: 0.95rem;
      color: #ffffff;
    }

    .user-meta span {
      font-size: 0.8rem;
      color: var(--neon-cyan);
    }

    /* FAQ 手风琴 */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .faq-question {
      padding: 18px 22px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: #ffffff;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--neon-pink);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.3s ease;
      padding: 0 22px;
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.6;
    }

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

    /* 表单与联系我们 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: flex-start;
    }

    .form-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
    }

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      margin-bottom: 6px;
      color: #e5d8f6;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(11, 7, 22, 0.8);
      border: 1px solid rgba(255, 42, 133, 0.3);
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.25s ease;
    }

    .form-control:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
    }

    .contact-info-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
    }

    .contact-list {
      list-style: none;
      margin-bottom: 24px;
    }

    .contact-list li {
      margin-bottom: 14px;
      font-size: 0.95rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .contact-list strong {
      color: #fff;
    }

    .qr-wrapper {
      text-align: center;
      background: rgba(255, 255, 255, 0.03);
      padding: 18px;
      border-radius: var(--radius-md);
      border: 1px dashed var(--border-color);
    }

    .qr-wrapper img {
      max-width: 140px;
      height: auto;
      border-radius: var(--radius-sm);
      display: block;
      margin: 0 auto 10px;
    }

    .qr-wrapper span {
      font-size: 0.85rem;
      color: var(--neon-pink);
    }

    /* 行业资讯与文章链接 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }

    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-main);
      display: block;
      transition: all 0.25s ease;
    }

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

    /* 页脚与友情链接 */
    footer.site-footer {
      background: #06030d;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 0.88rem;
    }

    .footer-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 24px;
      padding-bottom: 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .footer-links-row span {
      color: #fff;
      font-weight: 700;
    }

    .footer-links-row a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
    }

    /* 悬浮客服 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      box-shadow: var(--glow-pink);
      cursor: pointer;
      border: none;
      transition: transform 0.25s ease;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-stats-grid,
      .flow-steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid,
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .faq-grid,
      .case-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: rgba(11, 7, 22, 0.98);
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
        margin: 6px 0;
      }
      .mobile-menu-toggle {
        display: block;
      }
    }

    @media (max-width: 576px) {
      .hero-stats-grid,
      .flow-steps-grid {
        grid-template-columns: 1fr;
      }
      .feature-points {
        grid-template-columns: 1fr;
      }
      .hero-actions {
        flex-direction: column;
      }
      .hero-actions .btn-cyber {
        width: 100%;
      }
    }