:root {
      --bg-base: #0a0d14;
      --bg-surface: #101522;
      --bg-card: rgba(20, 27, 45, 0.7);
      --bg-card-hover: rgba(28, 38, 65, 0.85);
      --neon-cyan: #00f0ff;
      --neon-pink: #ff007f;
      --neon-purple: #9d4edd;
      --neon-green: #00ff88;
      --text-main: #f0f4fc;
      --text-muted: #94a3b8;
      --text-dim: #64748b;
      --border-glow: rgba(0, 240, 255, 0.25);
      --border-glow-pink: rgba(255, 0, 127, 0.25);
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: var(--font-family);
    }

    body {
      background-color: var(--bg-base);
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 240, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(255, 0, 127, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(157, 78, 221, 0.05) 0%, transparent 60%);
      background-attachment: fixed;
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.15);
      width: 100%;
    }

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

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

    .brand-logo-wrap {
      max-width: 130px;
      display: flex;
      align-items: center;
    }

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

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

    .nav-links li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      padding: 8px 12px;
      transition: all 0.3s ease;
      display: inline-block;
      white-space: nowrap;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--neon-cyan);
      text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 6px;
      font-size: 14px;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.3s ease;
      border: 1px solid transparent;
      outline: none;
    }

    .btn-neon-cyan {
      background: rgba(0, 240, 255, 0.1);
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
    }

    .btn-neon-cyan:hover {
      background: var(--neon-cyan);
      color: #030712;
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
      transform: translateY(-2px);
    }

    .btn-neon-pink {
      background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
      color: #ffffff;
      box-shadow: 0 0 15px rgba(255, 0, 127, 0.3);
    }

    .btn-neon-pink:hover {
      box-shadow: 0 0 25px rgba(255, 0, 127, 0.6);
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      color: var(--text-main);
      font-size: 24px;
      cursor: pointer;
    }

    /* 章节通用样式 */
    section.section-block {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 2px;
      color: var(--neon-cyan);
      background: rgba(0, 240, 255, 0.08);
      border: 1px solid rgba(0, 240, 255, 0.3);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: #ffffff;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }

    .section-title span.glow-cyan {
      color: var(--neon-cyan);
      text-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
    }

    .section-title span.glow-pink {
      color: var(--neon-pink);
      text-shadow: 0 0 15px rgba(255, 0, 127, 0.4);
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 首屏 Hero (严格无图，纯CSS/科技感设计) */
    .hero-section {
      padding: 100px 0 80px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 0, 127, 0.1);
      border: 1px solid rgba(255, 0, 127, 0.35);
      color: #ff70b5;
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
    }

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

    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 24px;
      letter-spacing: -1px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 840px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 18px;
      margin-bottom: 60px;
      flex-wrap: wrap;
    }

    .hero-actions .btn-official {
      padding: 14px 34px;
      font-size: 16px;
      border-radius: 8px;
      background: linear-gradient(135deg, #00f0ff 0%, #0077ff 100%);
      color: #030712;
      font-weight: 700;
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
      border: none;
    }

    .hero-actions .btn-official:hover {
      box-shadow: 0 0 35px rgba(0, 240, 255, 0.8);
      transform: translateY(-2px);
    }

    /* 核心数据指标卡片 */
    .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-glow);
      padding: 24px 20px;
      border-radius: 12px;
      text-align: left;
      position: relative;
      overflow: hidden;
      transition: transform 0.3s ease, border-color 0.3s ease;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-cyan);
      box-shadow: 0 8px 24px rgba(0, 240, 255, 0.15);
    }

    .metric-val {
      font-size: 32px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 6px;
      font-family: monospace;
    }

    .metric-val span {
      font-size: 18px;
      color: var(--neon-cyan);
    }

    .metric-lbl {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 模型矩阵与生态 */
    .tags-matrix {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-chip {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.12);
      color: var(--text-main);
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 13px;
      font-weight: 500;
      transition: all 0.25s ease;
    }

    .model-chip:hover {
      border-color: var(--neon-pink);
      color: var(--neon-pink);
      background: rgba(255, 0, 127, 0.05);
      box-shadow: 0 0 12px rgba(255, 0, 127, 0.2);
    }

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

    .service-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      padding: 28px;
      position: relative;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-5px);
      box-shadow: 0 10px 30px rgba(0, 240, 255, 0.12);
    }

    .service-icon-box {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid rgba(0, 240, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-cyan);
      margin-bottom: 20px;
      font-size: 18px;
    }

    .service-title {
      font-size: 18px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 12px;
    }

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

    /* 流程步骤 */
    .timeline-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .timeline-step {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.07);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }

    .step-number {
      font-size: 12px;
      font-weight: 800;
      color: var(--neon-pink);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 12px;
    }

    .step-name {
      font-size: 17px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 8px;
    }

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

    /* 对比评测表格 */
    .eval-section {
      background: rgba(16, 21, 34, 0.5);
      border-radius: 16px;
      border: 1px solid rgba(0, 240, 255, 0.15);
      padding: 40px;
      overflow-x: auto;
    }

    .eval-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      padding-bottom: 24px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-num {
      font-size: 48px;
      font-weight: 900;
      color: var(--neon-green);
      font-family: monospace;
      line-height: 1;
      text-shadow: 0 0 15px rgba(0, 255, 136, 0.4);
    }

    .score-stars {
      color: #ffb703;
      font-size: 18px;
      letter-spacing: 2px;
    }

    .score-meta {
      font-size: 14px;
      color: var(--text-muted);
    }

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

    .eval-table th {
      padding: 16px 20px;
      font-size: 14px;
      color: var(--text-muted);
      border-bottom: 1px solid rgba(255, 255, 255, 0.12);
      font-weight: 600;
    }

    .eval-table td {
      padding: 18px 20px;
      font-size: 14px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      color: var(--text-main);
    }

    .eval-table tr:hover td {
      background: rgba(0, 240, 255, 0.03);
    }

    .eval-highlight {
      color: var(--neon-cyan);
      font-weight: 600;
    }

    /* 案例展示区 (含素材图按规范插入，首屏外部) */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      overflow: hidden;
      transition: transform 0.3s ease;
    }

    .case-card:hover {
      transform: translateY(-5px);
      border-color: var(--neon-pink);
    }

    .case-media {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #182033;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .case-body {
      padding: 20px;
    }

    .case-title {
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 8px;
    }

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

    /* 宣传图画廊展示 */
    .banner-gallery-wrap {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .banner-gallery-item {
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid rgba(0, 240, 255, 0.2);
    }

    /* 客户评论卡片 (6条) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-card:hover {
      border-color: var(--neon-purple);
      box-shadow: 0 6px 20px rgba(157, 78, 221, 0.15);
    }

    .review-content {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }

    .review-author-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 14px;
    }

    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-pink));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #030712;
      font-size: 15px;
    }

    .review-meta h4 {
      font-size: 14px;
      font-weight: 600;
      color: #ffffff;
    }

    .review-meta p {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* FAQ 折叠面板 (不少于10条) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.07);
      border-radius: 8px;
      overflow: hidden;
      transition: all 0.3s ease;
    }

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

    .faq-header {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 15px;
      font-weight: 600;
      color: #ffffff;
      user-select: none;
    }

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

    .faq-arrow {
      transition: transform 0.3s ease;
      color: var(--neon-cyan);
      font-size: 12px;
    }

    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }

    .faq-body {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    /* 文章资讯专栏 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .article-item {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.06);
      padding: 20px;
      border-radius: 10px;
      transition: all 0.3s ease;
    }

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

    .article-item a {
      color: #ffffff;
      text-decoration: none;
      font-size: 15px;
      font-weight: 600;
      display: block;
      margin-bottom: 6px;
    }

    .article-item a:hover {
      color: var(--neon-cyan);
    }

    .article-meta {
      font-size: 12px;
      color: var(--text-dim);
    }

    /* 需求匹配与联络表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      background: var(--bg-surface);
      border: 1px solid rgba(0, 240, 255, 0.2);
      border-radius: 16px;
      padding: 40px;
    }

    .contact-form-block form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      background: rgba(10, 13, 20, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 6px;
      padding: 12px 14px;
      color: #ffffff;
      font-size: 14px;
      outline: none;
      font-family: inherit;
      transition: border-color 0.25s ease;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.25);
    }

    .form-textarea {
      resize: vertical;
      min-height: 90px;
    }

    .contact-info-block {
      display: flex;
      flex-direction: column;
      gap: 20px;
      justify-content: center;
    }

    .info-card-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      background: rgba(255, 255, 255, 0.02);
      padding: 16px;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.06);
    }

    .info-card-item h5 {
      font-size: 14px;
      color: #ffffff;
      margin-bottom: 4px;
    }

    .info-card-item p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .qr-container {
      width: 110px;
      height: 110px;
      background: #ffffff;
      padding: 6px;
      border-radius: 8px;
      overflow: hidden;
      flex-shrink: 0;
    }

    .qr-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    /* 友情链接与页脚 */
    footer.site-footer {
      background: #07090f;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 50px 0 30px;
      color: var(--text-muted);
    }

    .footer-links-wrap {
      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-wrap span {
      font-size: 13px;
      color: var(--text-dim);
      margin-right: 8px;
    }

    .footer-links-wrap a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 13px;
      transition: color 0.25s ease;
    }

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

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--text-dim);
      flex-wrap: wrap;
      gap: 12px;
    }

    /* 悬浮客服面板 */
    .floating-service {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: rgba(16, 21, 34, 0.85);
      border: 1px solid var(--neon-cyan);
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--neon-cyan);
      text-decoration: none;
      font-size: 12px;
      font-weight: 700;
      transition: all 0.3s ease;
      position: relative;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: var(--neon-cyan);
      color: #030712;
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
    }

    .float-qr-pop {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: var(--bg-surface);
      border: 1px solid var(--neon-cyan);
      padding: 12px;
      border-radius: 8px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
      width: 140px;
      text-align: center;
    }

    .float-qr-pop img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      display: block;
    }

    .float-qr-pop p {
      font-size: 11px;
      color: var(--neon-cyan);
      margin-top: 6px;
    }

    .float-btn:hover .float-qr-pop {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid, .cases-grid, .banner-gallery-wrap, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-wrap {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .articles-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(10, 13, 20, 0.98);
        border-bottom: 1px solid rgba(0, 240, 255, 0.2);
        padding: 20px 0;
      }
      .nav-menu.open {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: center;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-links li a {
        padding: 12px;
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .metrics-grid, .services-grid, .cases-grid, .banner-gallery-wrap, .reviews-grid, .timeline-wrap {
        grid-template-columns: 1fr;
      }
      .header-cta-group {
        display: none;
      }
    }