:root {
      --bg-main: #0c0817;
      --bg-card: #150f28;
      --bg-card-sub: #1e153b;
      --border-color: rgba(217, 70, 239, 0.28);
      --border-hover: rgba(236, 72, 153, 0.6);
      --primary-neon: #d946ef;
      --secondary-neon: #a855f7;
      --accent-pink: #ec4899;
      --cyan-glow: #06b6d4;
      --text-white: #fdf4ff;
      --text-muted: #cbd5e1;
      --text-dark: #0f172a;
      --max-width: 1240px;
      --transition: all 0.28s ease;
    }

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

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

    body {
      background-color: var(--bg-main);
      color: var(--text-white);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      position: relative;
    }

    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 100vw;
      height: 100vh;
      background: 
        radial-gradient(circle at 15% 20%, rgba(217, 70, 239, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(168, 85, 247, 0.15) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.05) 0%, transparent 60%);
      pointer-events: none;
      z-index: -1;
    }

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

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(12, 8, 23, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(217, 70, 239, 0.2);
    }

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

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

    .brand-wrap .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
      filter: drop-shadow(0 0 6px rgba(217, 70, 239, 0.6));
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      background: linear-gradient(90deg, #ffffff, #f0abfc);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.95rem;
      padding: 8px 14px;
      border-radius: 6px;
      transition: var(--transition);
      display: inline-block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      background: rgba(217, 70, 239, 0.15);
      text-shadow: 0 0 8px rgba(217, 70, 239, 0.8);
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      color: var(--text-white);
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 1rem;
      cursor: pointer;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: none;
      line-height: 1.2;
    }

    .btn-glow {
      background: linear-gradient(135deg, #d946ef, #a855f7);
      color: #ffffff;
      box-shadow: 0 0 16px rgba(217, 70, 239, 0.5);
    }

    .btn-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 24px rgba(217, 70, 239, 0.8);
      color: #ffffff;
    }

    .btn-outline {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-color);
      color: var(--text-white);
    }

    .btn-outline:hover {
      border-color: var(--primary-neon);
      background: rgba(217, 70, 239, 0.15);
      transform: translateY(-2px);
    }

    /* 首屏 Hero 无图片纯科技感 */
    .hero-section {
      padding: 90px 0 60px;
      position: relative;
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(217, 70, 239, 0.12);
      border: 1px solid rgba(217, 70, 239, 0.4);
      padding: 6px 16px;
      border-radius: 50px;
      font-size: 0.88rem;
      color: #f5d0fe;
      margin-bottom: 24px;
      box-shadow: 0 0 12px rgba(217, 70, 239, 0.2);
    }

    .hero-badge::before {
      content: "";
      width: 8px;
      height: 8px;
      background: #22c55e;
      border-radius: 50%;
      box-shadow: 0 0 8px #22c55e;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #ffffff 30%, #f472b6 70%, #c084fc 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      text-shadow: 0 0 30px rgba(217, 70, 239, 0.3);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 18px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .btn-hero-primary {
      padding: 14px 34px;
      font-size: 1.1rem;
      background: linear-gradient(135deg, #ec4899, #d946ef, #8b5cf6);
      color: #fff;
      font-weight: 700;
      box-shadow: 0 0 25px rgba(236, 72, 153, 0.65);
      border-radius: 30px;
    }

    .btn-hero-primary:hover {
      box-shadow: 0 0 35px rgba(217, 70, 239, 0.9);
      transform: scale(1.03);
    }

    /* 纯CSS首屏科技感数据阵列 */
    .hero-metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

    .metric-card {
      background: rgba(26, 18, 48, 0.6);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 20px;
      text-align: center;
      position: relative;
      overflow: hidden;
      backdrop-filter: blur(10px);
      transition: var(--transition);
    }

    .metric-card:hover {
      border-color: var(--primary-neon);
      transform: translateY(-4px);
      box-shadow: 0 8px 24px rgba(217, 70, 239, 0.2);
    }

    .metric-card::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--accent-pink), transparent);
    }

    .metric-num {
      font-size: 1.9rem;
      font-weight: 800;
      color: #fbcfe8;
      display: block;
      margin-bottom: 4px;
      font-family: monospace;
      text-shadow: 0 0 10px rgba(236, 72, 153, 0.5);
    }

    .metric-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 区域通用结构 */
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 45px;
    }

    .section-tag {
      font-size: 0.82rem;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--primary-neon);
      margin-bottom: 8px;
      font-weight: 700;
    }

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

    .section-title::after {
      content: "";
      display: block;
      width: 50px;
      height: 3px;
      background: linear-gradient(90deg, var(--primary-neon), var(--cyan-glow));
      margin: 10px auto 0;
      border-radius: 2px;
    }

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

    /* 卡片网格与组件通用 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
      align-items: center;
    }

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

    .cyber-card:hover {
      border-color: var(--border-hover);
      transform: translateY(-4px);
      box-shadow: 0 10px 28px rgba(168, 85, 247, 0.22);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(217, 70, 239, 0.2), rgba(168, 85, 247, 0.3));
      border: 1px solid rgba(217, 70, 239, 0.4);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 16px;
      color: #fdf4ff;
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 8px;
    }

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

    /* 平台模型滚动墙标签 */
    .model-tags-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-pill {
      background: rgba(30, 21, 59, 0.7);
      border: 1px solid rgba(217, 70, 239, 0.25);
      color: #f5d0fe;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-family: monospace;
      transition: var(--transition);
    }

    .model-pill:hover {
      border-color: var(--accent-pink);
      background: rgba(236, 72, 153, 0.2);
      transform: scale(1.05);
    }

    /* 行业案例与图片卡片 */
    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .media-thumb {
      width: 100%;
      height: 200px;
      overflow: hidden;
      position: relative;
      background: #110d21;
    }

    .media-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-thumb img {
      transform: scale(1.06);
    }

    .media-body {
      padding: 20px;
      flex-grow: 1;
    }

    /* 评测卡片与对比评测 */
    .eval-highlight {
      background: linear-gradient(135deg, rgba(217, 70, 239, 0.15), rgba(168, 85, 247, 0.1));
      border: 1px solid var(--primary-neon);
      border-radius: 14px;
      padding: 30px;
      display: flex;
      justify-content: space-around;
      align-items: center;
      margin-bottom: 35px;
      flex-wrap: wrap;
      gap: 20px;
      text-align: center;
    }

    .eval-score-box .score-val {
      font-size: 3.2rem;
      font-weight: 900;
      color: #f472b6;
      text-shadow: 0 0 15px rgba(244, 114, 182, 0.6);
      line-height: 1;
    }

    .eval-stars {
      color: #fbbf24;
      font-size: 1.4rem;
      letter-spacing: 4px;
      margin: 8px 0;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      border: 1px solid var(--border-color);
      border-radius: 12px;
    }

    .cyber-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .cyber-table th, .cyber-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(217, 70, 239, 0.15);
    }

    .cyber-table th {
      background: rgba(30, 21, 59, 0.9);
      color: #fdf4ff;
      font-size: 0.95rem;
    }

    .cyber-table tr:hover td {
      background: rgba(217, 70, 239, 0.06);
    }

    .badge-win {
      background: rgba(34, 197, 94, 0.2);
      border: 1px solid #22c55e;
      color: #86efac;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.8rem;
    }

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

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

    .step-number {
      position: absolute;
      top: -12px;
      left: 20px;
      background: linear-gradient(135deg, var(--accent-pink), var(--primary-neon));
      color: #fff;
      font-weight: 800;
      font-size: 0.85rem;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 10px var(--primary-neon);
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 18px 22px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 1rem;
      font-weight: 600;
      color: #fdf4ff;
    }

    .faq-question:hover {
      color: #f472b6;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--primary-neon);
    }

    .faq-card.open .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: rgba(14, 9, 26, 0.4);
    }

    .faq-answer-inner {
      padding: 0 22px 18px;
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 表单组件 */
    .form-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      max-width: 680px;
      margin: 0 auto;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      margin-bottom: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #f5d0fe;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      background: rgba(12, 8, 23, 0.7);
      border: 1px solid rgba(217, 70, 239, 0.3);
      border-radius: 8px;
      padding: 12px 16px;
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-neon);
      box-shadow: 0 0 10px rgba(217, 70, 239, 0.4);
    }

    /* 客户评论 */
    .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-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
    }

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-pink), var(--cyan-glow));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
    }

    .user-info h4 {
      font-size: 0.95rem;
      color: #fff;
    }

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

    /* 文章调用与外链 */
    .articles-block {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      margin-top: 24px;
    }

    .article-external-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-external-links a {
      color: #f0abfc;
      text-decoration: none;
      font-size: 0.88rem;
      background: rgba(217, 70, 239, 0.1);
      padding: 6px 14px;
      border-radius: 6px;
      border: 1px solid rgba(217, 70, 239, 0.25);
      transition: var(--transition);
    }

    .article-external-links a:hover {
      background: var(--primary-neon);
      color: #fff;
      box-shadow: 0 0 10px var(--primary-neon);
    }

    /* 代理加盟专区 */
    .agent-box {
      background: linear-gradient(135deg, rgba(217, 70, 239, 0.15), rgba(6, 182, 212, 0.12));
      border: 1px solid var(--border-hover);
      border-radius: 16px;
      padding: 40px;
      text-align: center;
    }

    /* 页脚 */
    footer.site-footer {
      background: #080510;
      border-top: 1px solid rgba(217, 70, 239, 0.2);
      padding: 50px 0 30px;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      margin-bottom: 16px;
    }

    .footer-col p {
      margin-bottom: 8px;
    }

    .footer-col a {
      color: var(--text-muted);
      text-decoration: none;
      transition: var(--transition);
    }

    .footer-col a:hover {
      color: var(--primary-neon);
    }

    .footer-qrcode {
      width: 110px;
      height: 110px;
      padding: 4px;
      background: #fff;
      border-radius: 8px;
      display: inline-block;
      margin-top: 8px;
    }

    .footer-qrcode img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friend-links a {
      color: #cbd5e1;
      text-decoration: none;
      background: rgba(255, 255, 255, 0.05);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.85rem;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .friend-links a:hover {
      color: #fdf4ff;
      border-color: var(--primary-neon);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
    }

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

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-pink), var(--primary-neon));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      box-shadow: 0 0 15px rgba(217, 70, 239, 0.6);
      font-size: 1.1rem;
      border: none;
      cursor: pointer;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.1);
      box-shadow: 0 0 22px rgba(217, 70, 239, 0.9);
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .grid-4, .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .hero-metric-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .grid-2 {
        grid-template-columns: 1fr;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(15, 10, 28, 0.97);
        flex-direction: column;
        padding: 20px 0;
        border-bottom: 1px solid var(--border-color);
        display: none;
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li a {
        padding: 12px 24px;
        width: 100%;
        text-align: center;
      }
    }