:root {
      --bg-dark: #090514;
      --bg-card: #150d2a;
      --bg-card-hover: #1e133a;
      --pink-neon: #ff007f;
      --purple-neon: #9d4edd;
      --cyan-neon: #00f0ff;
      --text-main: #f1ecfc;
      --text-sub: #b3a7d4;
      --text-muted: #7e71a7;
      --border-cyber: rgba(255, 0, 127, 0.3);
      --border-glow: rgba(157, 78, 221, 0.5);
      --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

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

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: var(--font-base);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(255, 0, 127, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 65%, rgba(157, 78, 221, 0.1) 0%, transparent 45%);
      background-attachment: fixed;
    }

    a {
      color: var(--pink-neon);
      text-decoration: none;
      transition: all 0.3s ease;
    }

    a:hover {
      color: var(--cyan-neon);
      text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部 Header 与 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(9, 5, 20, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-cyber);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .ai-page-home-link {
      font-weight: 600;
      padding: 4px 10px;
      border: 1px solid rgba(255, 0, 127, 0.4);
      border-radius: 4px;
      background: rgba(255, 0, 127, 0.1);
      font-size: 0.9rem;
    }

    .nav-container {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 12px;
      font-size: 0.92rem;
      color: var(--text-sub);
      white-space: nowrap;
      transition: color 0.2s ease, text-shadow 0.2s ease;
    }

    .nav-links li a:hover {
      color: #ffffff;
      text-shadow: 0 0 10px var(--pink-neon);
    }

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

    .btn-cyber-sm {
      padding: 6px 16px;
      border-radius: 20px;
      background: linear-gradient(135deg, var(--pink-neon), var(--purple-neon));
      color: #fff !important;
      font-size: 0.88rem;
      font-weight: 600;
      box-shadow: 0 0 12px rgba(255, 0, 127, 0.4);
      border: none;
      cursor: pointer;
    }

    .btn-cyber-sm:hover {
      box-shadow: 0 0 20px rgba(255, 0, 127, 0.8);
      transform: translateY(-1px);
    }

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

    /* 首屏 Hero - 无图片设计 */
    .hero-section {
      padding: 90px 0 70px 0;
      text-align: center;
      position: relative;
      background: radial-gradient(ellipse at center, rgba(157, 78, 221, 0.15) 0%, rgba(9, 5, 20, 0) 70%);
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 18px;
      border-radius: 50px;
      background: rgba(255, 0, 127, 0.12);
      border: 1px solid var(--pink-neon);
      color: var(--pink-neon);
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 1px;
      margin-bottom: 20px;
      text-transform: uppercase;
      box-shadow: 0 0 15px rgba(255, 0, 127, 0.2);
    }

    .hero-title {
      font-size: 2.5rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #ffffff 0%, #f1ecfc 50%, var(--pink-neon) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 0 30px rgba(255, 0, 127, 0.3);
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-sub);
      max-width: 800px;
      margin: 0 auto 35px auto;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 32px;
      border-radius: 6px;
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
      text-decoration: none !important;
    }

    .btn-main-action {
      background: linear-gradient(90deg, #ff007f, #9d4edd);
      color: #ffffff !important;
      border: none;
      box-shadow: 0 0 25px rgba(255, 0, 127, 0.5);
    }

    .btn-main-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 35px rgba(255, 0, 127, 0.8);
    }

    .btn-sub-action {
      background: rgba(21, 13, 42, 0.8);
      color: var(--cyan-neon) !important;
      border: 1px solid var(--cyan-neon);
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
    }

    .btn-sub-action:hover {
      background: rgba(0, 240, 255, 0.1);
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
    }

    /* 指标与数据卡片 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 10px;
      padding: 24px 16px;
      text-align: center;
      position: relative;
      overflow: hidden;
      transition: transform 0.3s ease, border-color 0.3s ease;
    }

    .metric-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--pink-neon), var(--cyan-neon));
    }

    .metric-card:hover {
      transform: translateY(-4px);
      border-color: var(--pink-neon);
      box-shadow: 0 8px 25px rgba(255, 0, 127, 0.2);
    }

    .metric-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 6px;
      font-family: monospace, sans-serif;
    }

    .metric-number span {
      color: var(--cyan-neon);
      font-size: 1.2rem;
    }

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

    /* 通用 Block 样式 */
    .section-padding {
      padding: 70px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .section-header {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-tag {
      color: var(--cyan-neon);
      font-size: 0.88rem;
      font-weight: 600;
      letter-spacing: 2px;
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .section-desc {
      color: var(--text-sub);
      font-size: 1rem;
      max-width: 700px;
      margin: 0 auto;
    }

    /* 服务能力与功能网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid rgba(157, 78, 221, 0.2);
      border-radius: 12px;
      padding: 28px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--pink-neon);
      transform: translateY(-5px);
      box-shadow: 0 10px 30px rgba(157, 78, 221, 0.25);
    }

    .service-title {
      font-size: 1.25rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .service-title::before {
      content: '◆';
      color: var(--pink-neon);
      font-size: 0.9rem;
    }

    .service-desc {
      font-size: 0.93rem;
      color: var(--text-sub);
      line-height: 1.6;
      flex-grow: 1;
    }

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

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 10px;
      padding: 24px;
      position: relative;
    }

    .step-num {
      font-size: 2rem;
      font-weight: 900;
      color: rgba(255, 0, 127, 0.3);
      position: absolute;
      top: 15px;
      right: 15px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 10px;
    }

    .step-desc {
      font-size: 0.88rem;
      color: var(--text-sub);
    }

    /* 对比表格 */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: 12px;
      border: 1px solid var(--border-cyber);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .compare-table th {
      background: rgba(157, 78, 221, 0.15);
      color: #ffffff;
      font-size: 1rem;
    }

    .compare-table tr:hover {
      background: rgba(255, 0, 127, 0.05);
    }

    .highlight-cell {
      color: var(--pink-neon);
      font-weight: 700;
    }

    /* 评测分数 Highlight Block */
    .rating-banner {
      background: linear-gradient(135deg, rgba(255, 0, 127, 0.15), rgba(157, 78, 221, 0.2));
      border: 1px solid var(--pink-neon);
      border-radius: 10px;
      padding: 20px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
    }

    .rating-score {
      font-size: 2.2rem;
      font-weight: 800;
      color: #ffffff;
    }

    .rating-score span {
      color: var(--cyan-neon);
      font-size: 1rem;
    }

    .rating-stars {
      color: #ffb703;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }

    /* 素材图片区 (专用于非首屏的案例中心与视觉展示) */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .gallery-item {
      background: var(--bg-card);
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid var(--border-cyber);
    }

    .ai-page-image {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }

    .gallery-item:hover .ai-page-image {
      transform: scale(1.03);
    }

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

    .review-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 10px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-main);
      margin-bottom: 16px;
      font-style: italic;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 12px;
    }

    .avatar-ph {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--pink-neon), var(--purple-neon));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
    }

    .user-info .user-name {
      font-size: 0.95rem;
      font-weight: 600;
      color: #fff;
    }

    .user-info .user-role {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid rgba(157, 78, 221, 0.25);
      border-radius: 8px;
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      background: transparent;
      border: none;
      color: #ffffff;
      font-size: 1rem;
      font-weight: 600;
      text-align: left;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-question::after {
      content: '+';
      font-size: 1.4rem;
      color: var(--pink-neon);
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-question::after {
      content: '−';
      transform: rotate(180deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-sub);
      font-size: 0.93rem;
      background: rgba(9, 5, 20, 0.4);
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 20px 24px;
    }

    /* 表单区块 */
    .form-wrapper {
      max-width: 750px;
      margin: 0 auto;
      background: var(--bg-card);
      border: 1px solid var(--border-cyber);
      border-radius: 12px;
      padding: 35px;
      box-shadow: 0 0 35px rgba(255, 0, 127, 0.15);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-group.full-width {
      grid-column: span 2;
    }

    .form-label {
      font-size: 0.9rem;
      color: var(--text-main);
      font-weight: 500;
    }

    .form-control {
      background: rgba(9, 5, 20, 0.8);
      border: 1px solid rgba(157, 78, 221, 0.4);
      border-radius: 6px;
      padding: 12px 16px;
      color: #ffffff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.3s ease;
    }

    .form-control:focus {
      border-color: var(--pink-neon);
      box-shadow: 0 0 10px rgba(255, 0, 127, 0.3);
    }

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

    /* 标签云与多模型展示 */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 25px;
    }

    .tag-item {
      background: rgba(157, 78, 221, 0.15);
      border: 1px solid rgba(157, 78, 221, 0.4);
      color: #e2d9f7;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
    }

    /* 底部 Footer */
    .site-footer {
      background: #05030b;
      border-top: 1px solid var(--border-cyber);
      padding: 60px 0 30px 0;
      color: var(--text-sub);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      margin-bottom: 18px;
      position: relative;
    }

    .footer-col h4::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 30px;
      height: 2px;
      background: var(--pink-neon);
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a {
      color: var(--text-sub);
      font-size: 0.9rem;
    }

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

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 15px;
    }

    .friend-links-box a {
      font-size: 0.88rem;
      color: var(--text-sub);
      background: rgba(255, 255, 255, 0.05);
      padding: 4px 10px;
      border-radius: 4px;
    }

    .qr-box {
      text-align: center;
      max-width: 140px;
    }

    .qr-box img {
      width: 100%;
      height: auto;
      border-radius: 6px;
      border: 1px solid var(--border-cyber);
    }

    .copyright {
      text-align: center;
      padding-top: 25px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 0.85rem;
      color: var(--text-muted);
    }

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

    .cs-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--pink-neon), var(--purple-neon));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 15px rgba(255, 0, 127, 0.6);
      cursor: pointer;
      font-weight: 700;
      font-size: 0.8rem;
      border: none;
    }

    /* 响应式样式 */
    @media (max-width: 992px) {
      .metrics-grid, .services-grid, .process-steps, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 20px 0;
        border-bottom: 1px solid var(--border-cyber);
      }

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

      .nav-toggle {
        display: block;
      }

      .metrics-grid, .services-grid, .process-steps, .reviews-grid, .gallery-grid {
        grid-template-columns: 1fr;
      }

      .form-grid {
        grid-template-columns: 1fr;
      }

      .form-group.full-width {
        grid-column: span 1;
      }

      .hero-title {
        font-size: 1.8rem;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }
    }