:root {
      --bg-base: #0b0718;
      --bg-surface: #140d2d;
      --bg-card: #1b1238;
      --bg-card-hover: #26194d;
      --primary: #d946ef;
      --primary-glow: rgba(217, 70, 239, 0.4);
      --secondary: #8b5cf6;
      --secondary-glow: rgba(139, 92, 246, 0.4);
      --accent: #06b6d4;
      --text-main: #f8fafc;
      --text-muted: #cbd5e1;
      --text-dim: #94a3b8;
      --border-color: rgba(217, 70, 239, 0.22);
      --border-highlight: rgba(217, 70, 239, 0.6);
      --container-width: 1200px;
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-base);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(217, 70, 239, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 65%, rgba(139, 92, 246, 0.15) 0%, transparent 45%),
        linear-gradient(180deg, #0b0718 0%, #110a24 50%, #0b0718 100%);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition-smooth);
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 7, 24, 0.85);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.15rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      background: linear-gradient(135deg, #fff 0%, #f472b6 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      background: rgba(217, 70, 239, 0.15);
      text-shadow: 0 0 8px var(--primary-glow);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.92rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition-smooth);
    }

    .btn-primary {
      background: linear-gradient(135deg, #d946ef 0%, #8b5cf6 100%);
      color: #fff;
      box-shadow: 0 4px 18px var(--primary-glow);
    }

    .btn-primary:hover {
      box-shadow: 0 6px 24px rgba(217, 70, 239, 0.7);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: rgba(255, 255, 255, 0.04);
      color: #fff;
      border-color: var(--border-color);
    }

    .btn-outline:hover {
      background: rgba(217, 70, 239, 0.18);
      border-color: var(--primary);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 1.5rem;
      cursor: pointer;
    }

    /* 首屏 Hero 区域 (无图片) */
    .hero-section {
      padding: 100px 0 70px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 999px;
      background: rgba(217, 70, 239, 0.12);
      border: 1px solid var(--border-color);
      color: #f472b6;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 0 16px rgba(217, 70, 239, 0.2);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
      background: linear-gradient(135deg, #ffffff 10%, #f472b6 60%, #c084fc 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 54px;
      flex-wrap: wrap;
    }

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

    /* 赛博网格与多模型标签矩阵 (替代首屏图片) */
    .model-matrix-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
      position: relative;
      overflow: hidden;
    }

    .model-matrix-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 18px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding-bottom: 12px;
      flex-wrap: wrap;
      gap: 10px;
    }

    .matrix-title {
      font-size: 0.95rem;
      color: var(--accent);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .matrix-title::before {
      content: "";
      display: inline-block;
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--accent);
    }

    .model-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }

    .model-pill {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(217, 70, 239, 0.2);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.8rem;
      color: var(--text-muted);
      font-family: monospace;
      transition: var(--transition-smooth);
    }

    .model-pill:hover {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
      transform: translateY(-2px);
      box-shadow: 0 4px 12px var(--primary-glow);
    }

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

    .section-block-alt {
      background: rgba(20, 13, 45, 0.45);
      border-top: 1px solid rgba(217, 70, 239, 0.1);
      border-bottom: 1px solid rgba(217, 70, 239, 0.1);
    }

    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 50px;
    }

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

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1rem;
    }

    /* 数据指标卡片 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
      transition: var(--transition-smooth);
    }

    .metric-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary);
      box-shadow: 0 10px 24px rgba(217, 70, 239, 0.2);
    }

    .metric-value {
      font-size: 2.2rem;
      font-weight: 800;
      color: #f472b6;
      margin-bottom: 6px;
      font-family: monospace;
    }

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

    /* 服务与能力网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 28px;
      transition: var(--transition-smooth);
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      border-color: var(--border-highlight);
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(139, 92, 246, 0.25);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: rgba(217, 70, 239, 0.12);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 20px;
      border: 1px solid rgba(217, 70, 239, 0.3);
    }

    .service-title {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: #fff;
    }

    .service-content {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.65;
      flex-grow: 1;
    }

    .service-tag {
      margin-top: 18px;
      font-size: 0.78rem;
      color: var(--accent);
      font-weight: 500;
    }

    /* 对比评测模块 */
    .benchmark-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      overflow: hidden;
      padding: 30px;
      box-shadow: 0 14px 32px rgba(0, 0, 0, 0.35);
    }

    .benchmark-score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(90deg, rgba(217, 70, 239, 0.15), rgba(139, 92, 246, 0.15));
      border: 1px solid var(--border-highlight);
      border-radius: 12px;
      padding: 20px 28px;
      margin-bottom: 28px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-left {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .score-num {
      font-size: 3rem;
      font-weight: 900;
      color: #f472b6;
      line-height: 1;
      font-family: monospace;
    }

    .score-meta {
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .score-stars {
      color: #fbbf24;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

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

    .eval-table th {
      background: rgba(255, 255, 255, 0.03);
      color: #fff;
      font-weight: 600;
    }

    .eval-table tr:hover td {
      background: rgba(217, 70, 239, 0.04);
    }

    .eval-table .highlight-col {
      color: #f472b6;
      font-weight: 600;
    }

    /* 案例展示模块包含真实素材 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

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

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

    .case-media-box {
      width: 100%;
      overflow: hidden;
      position: relative;
      background: #000;
    }

    .case-media-box img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .case-card:hover .case-media-box img {
      transform: scale(1.05);
    }

    .case-body {
      padding: 20px;
    }

    .case-category {
      font-size: 0.8rem;
      color: var(--accent);
      font-weight: 600;
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .case-title {
      font-size: 1.15rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }

    .case-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

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

    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #fff;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 16px;
      box-shadow: 0 0 12px var(--primary-glow);
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }

    .step-text {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 用户评论卡片 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
      gap: 22px;
    }

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

    .testimonial-quote {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      position: relative;
    }

    .user-profile {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 14px;
    }

    .user-avatar {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, #d946ef, #8b5cf6);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
      font-size: 1rem;
    }

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

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

    /* FAQ 折叠面板 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition-smooth);
    }

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

    .faq-question {
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 600;
      font-size: 1rem;
      color: #fff;
      user-select: none;
    }

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: rgba(0, 0, 0, 0.2);
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }

    .faq-answer p {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
    }

    /* 需求匹配表单与联系区 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 18px;
      padding: 40px;
    }

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

    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 500;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(11, 7, 24, 0.8);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      color: #fff;
      font-size: 0.92rem;
      transition: var(--transition-smooth);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 10px var(--primary-glow);
    }

    select.form-control option {
      background: var(--bg-card);
      color: #fff;
    }

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

    .contact-info-panel {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .info-item-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
      color: var(--text-muted);
      font-size: 0.92rem;
    }

    .qrcode-box {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 18px;
      display: inline-flex;
      align-items: center;
      gap: 16px;
    }

    .qrcode-box img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      display: block;
    }

    .qrcode-text {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .qrcode-text strong {
      display: block;
      color: #fff;
      font-size: 0.95rem;
      margin-bottom: 4px;
    }

    /* 行业资讯与短代码文章区域 */
    .articles-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px 30px;
      margin-top: 24px;
    }

    .article-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 14px;
      list-style: none;
    }

    .article-links-list li a {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 0.86rem;
      color: var(--text-muted);
      display: inline-block;
    }

    .article-links-list li a:hover {
      color: #fff;
      border-color: var(--primary);
      background: rgba(217, 70, 239, 0.15);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #070410;
      border-top: 1px solid rgba(217, 70, 239, 0.2);
      padding: 60px 0 30px;
      font-size: 0.88rem;
      color: var(--text-dim);
    }

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

    .footer-col h4 {
      color: #fff;
      font-size: 1rem;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-links-list {
      list-style: none;
    }

    .footer-links-list li {
      margin-bottom: 10px;
    }

    .footer-links-list li a {
      color: var(--text-muted);
    }

    .footer-links-list li a:hover {
      color: var(--primary);
    }

    .friend-links-box {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.84rem;
    }

    .friend-links-box span {
      color: var(--accent);
      font-weight: 600;
    }

    .friend-links-box a {
      color: var(--text-dim);
    }

    .friend-links-box a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 24px;
      text-align: center;
      font-size: 0.82rem;
      color: #64748b;
    }

    /* 浮动操作栏 */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.1rem;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4);
      transition: var(--transition-smooth);
    }

    .float-btn:hover {
      background: var(--primary);
      border-color: var(--primary);
      transform: scale(1.08);
      box-shadow: 0 6px 18px var(--primary-glow);
    }

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--bg-surface);
        flex-direction: column;
        padding: 20px 0;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }