:root {
      --bg-primary: #070913;
      --bg-secondary: #0d1224;
      --bg-card: rgba(18, 26, 49, 0.7);
      --bg-card-hover: rgba(28, 40, 75, 0.85);
      --neon-cyan: #00f0ff;
      --neon-pink: #ff007f;
      --neon-purple: #8a2be2;
      --neon-blue: #0080ff;
      --text-main: #f0f4fc;
      --text-muted: #94a3b8;
      --border-glow: rgba(0, 240, 255, 0.25);
      --border-pink: rgba(255, 0, 127, 0.3);
      --container-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 20%, rgba(138, 43, 226, 0.15) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(0, 240, 255, 0.12) 0%, transparent 40%),
                  radial-gradient(circle at 50% 50%, rgba(255, 0, 127, 0.08) 0%, transparent 60%),
                  var(--bg-primary);
      background-attachment: fixed;
      overflow-x: hidden;
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 9, 19, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-glow);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
    }
    .brand-logo-wrap .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 1px;
      background: linear-gradient(90deg, #fff, var(--neon-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .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 14px;
      transition: all 0.3s ease;
      display: inline-block;
    }
    .nav-links a:hover {
      color: var(--neon-cyan);
      text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-neon-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      color: #fff;
      text-decoration: none;
      border-radius: 6px;
      background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
      border: 1px solid rgba(255, 255, 255, 0.3);
      box-shadow: 0 0 15px rgba(255, 0, 127, 0.4);
      transition: all 0.3s ease;
      cursor: pointer;
    }
    .btn-neon-glow:hover {
      box-shadow: 0 0 25px rgba(255, 0, 127, 0.8);
      transform: translateY(-2px);
    }
    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
      font-size: 1.4rem;
      padding: 4px 10px;
      border-radius: 4px;
      cursor: pointer;
    }

    /* 模块通用样式 */
    section.page-section {
      padding: 80px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      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);
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 15px;
      text-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 首屏 Hero (无图) */
    .hero-section {
      padding: 110px 0 80px 0;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(138, 43, 226, 0.2);
      border: 1px solid var(--neon-purple);
      border-radius: 30px;
      color: #e2d4ff;
      font-size: 0.9rem;
      margin-bottom: 25px;
      box-shadow: 0 0 20px rgba(138, 43, 226, 0.3);
    }
    .hero-h1 {
      font-size: 3rem;
      line-height: 1.25;
      font-weight: 800;
      max-width: 900px;
      margin: 0 auto 24px auto;
      background: linear-gradient(135deg, #ffffff 30%, var(--neon-cyan) 70%, var(--neon-pink) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }
    .hero-subtitle {
      font-size: 1.2rem;
      color: #cbd5e1;
      max-width: 780px;
      margin: 0 auto 40px auto;
      line-height: 1.8;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 20px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .btn-hero-primary {
      padding: 14px 36px;
      font-size: 1.1rem;
      font-weight: 700;
      color: #070913;
      background: var(--neon-cyan);
      border: 1px solid var(--neon-cyan);
      border-radius: 8px;
      text-decoration: none;
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.6);
      transition: all 0.3s ease;
    }
    .btn-hero-primary:hover {
      background: #fff;
      box-shadow: 0 0 35px rgba(0, 240, 255, 0.9);
      transform: translateY(-2px);
    }
    .btn-hero-secondary {
      padding: 14px 32px;
      font-size: 1.1rem;
      font-weight: 600;
      color: #fff;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.25);
      border-radius: 8px;
      text-decoration: none;
      transition: all 0.3s ease;
    }
    .btn-hero-secondary:hover {
      background: rgba(255, 255, 255, 0.15);
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
    }

    /* 指标看板 */
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 24px 16px;
      backdrop-filter: blur(8px);
      text-align: center;
      transition: transform 0.3s ease, border-color 0.3s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-pink);
    }
    .metric-value {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--neon-cyan);
      margin-bottom: 6px;
      font-family: monospace, sans-serif;
    }
    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 平台矩阵标签云 */
    .platform-ticker-wrap {
      margin-top: 40px;
      padding: 20px;
      background: rgba(13, 18, 36, 0.5);
      border-radius: 12px;
      border: 1px dashed rgba(0, 240, 255, 0.2);
    }
    .ticker-title {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 12px;
      text-align: center;
    }
    .ticker-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .ticker-tag {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 5px 12px;
      border-radius: 6px;
      font-size: 0.85rem;
      color: #cbd5e1;
      transition: all 0.2s ease;
    }
    .ticker-tag:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      background: rgba(0, 240, 255, 0.05);
    }

    /* 卡片通用网格 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      padding: 28px;
      transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
      position: relative;
      overflow: hidden;
    }
    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .feature-card:hover {
      transform: translateY(-5px);
      border-color: var(--border-glow);
      background: var(--bg-card-hover);
      box-shadow: 0 10px 30px rgba(0, 240, 255, 0.1);
    }
    .feature-card:hover::before {
      opacity: 1;
    }
    .card-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid var(--border-glow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      color: var(--neon-cyan);
      margin-bottom: 20px;
    }
    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
    }
    .card-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 流程步骤条 */
    .flow-step-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      padding: 24px;
      border-radius: 12px;
      position: relative;
    }
    .step-num {
      font-size: 2rem;
      font-weight: 900;
      color: var(--neon-pink);
      opacity: 0.8;
      margin-bottom: 10px;
    }

    /* 评测与对比表格 */
    .review-score-panel {
      background: linear-gradient(135deg, rgba(255, 0, 127, 0.1), rgba(138, 43, 226, 0.15));
      border: 1px solid var(--neon-pink);
      border-radius: 16px;
      padding: 30px;
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .score-left h3 {
      font-size: 1.6rem;
      color: #fff;
      margin-bottom: 8px;
    }
    .score-left p {
      color: var(--text-muted);
    }
    .score-right {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }
    .score-big {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--neon-cyan);
      text-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
    }
    .score-max {
      font-size: 1.2rem;
      color: var(--text-muted);
    }
    .stars-glow {
      color: #ffd700;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      border-radius: 12px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: var(--bg-card);
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      font-size: 0.95rem;
    }
    .comparison-table th {
      background: rgba(0, 0, 0, 0.4);
      color: var(--neon-cyan);
      font-weight: 600;
    }
    .comparison-table tr:hover {
      background: rgba(255, 255, 255, 0.02);
    }
    .highlight-cell {
      color: var(--neon-cyan);
      font-weight: 600;
    }

    /* 案例展示图文 */
    .case-card {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 12px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #0d1224;
      overflow: hidden;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.05);
    }
    .case-body {
      padding: 20px;
      flex-grow: 1;
    }
    .case-tag {
      font-size: 0.8rem;
      color: var(--neon-pink);
      text-transform: uppercase;
      margin-bottom: 6px;
      display: inline-block;
    }

    /* 用户评论 */
    .testimonial-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;
    }
    .testimonial-quote {
      font-size: 0.95rem;
      color: #e2e8f0;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 14px;
    }
    .user-avatar-badge {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
    }
    .user-info h4 {
      font-size: 0.95rem;
      color: #fff;
    }
    .user-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 折叠 FAQ */
    .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(255, 255, 255, 0.08);
      border-radius: 8px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: #fff;
      user-select: none;
      transition: color 0.2s ease;
    }
    .faq-question:hover {
      color: var(--neon-cyan);
    }
    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--neon-cyan);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 0 24px 18px 24px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 需求表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 40px;
    }
    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 0.9rem;
      color: #e2e8f0;
    }
    .form-control {
      background: rgba(7, 9, 19, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 6px;
      padding: 12px 14px;
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.3s ease;
    }
    .form-control:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
    }
    .contact-info-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 24px;
    }
    .qr-container {
      display: flex;
      align-items: center;
      gap: 20px;
      background: rgba(0, 0, 0, 0.3);
      padding: 16px;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, 0.05);
    }
    .qr-container img {
      width: 110px;
      height: 110px;
      border-radius: 6px;
      object-fit: cover;
    }
    .contact-detail-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }
    .contact-detail-list strong {
      color: #fff;
    }

    /* 文章列表与友情链接 */
    .article-link-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 20px;
    }
    .article-item-card {
      background: rgba(13, 18, 36, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 8px;
      padding: 16px;
      text-decoration: none;
      color: #e2e8f0;
      transition: all 0.3s ease;
      display: block;
    }
    .article-item-card:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      transform: translateX(4px);
    }

    /* 底部通用规范 */
    footer.site-footer {
      background: #05070e;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 60px 0 30px 0;
    }
    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s ease;
    }
    .footer-links a:hover {
      color: var(--neon-cyan);
    }
    .friend-links-box {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }
    .friend-links-box span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .friend-links-box a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.85rem;
      transition: color 0.2s ease;
    }
    .friend-links-box a:hover {
      color: var(--neon-cyan);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 悬浮客服挂件 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      color: var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
      transition: all 0.3s ease;
      text-decoration: none;
      font-size: 1.2rem;
    }
    .float-btn:hover {
      border-color: var(--neon-pink);
      color: var(--neon-pink);
      transform: scale(1.1);
    }

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .flow-step-wrap { grid-template-columns: repeat(2, 1fr); }
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-top-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .hero-h1 { font-size: 2.2rem; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #0a0d1d;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-glow);
      }
      .nav-links.active { display: flex; }
      .mobile-menu-btn { display: block; }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .flow-step-wrap { grid-template-columns: 1fr; }
      .hero-metrics { grid-template-columns: 1fr; }
      .footer-top-grid { grid-template-columns: 1fr; }
      .article-link-grid { grid-template-columns: 1fr; }
    }