:root {
      --bg-main: #0b0716;
      --bg-card: rgba(22, 14, 42, 0.78);
      --bg-card-hover: rgba(36, 20, 68, 0.88);
      --neon-purple: #c026d3;
      --neon-pink: #ec4899;
      --neon-cyan: #06b6d4;
      --neon-gradient: linear-gradient(135deg, #ec4899 0%, #c026d3 50%, #8b5cf6 100%);
      --text-white: #ffffff;
      --text-gray: #d1d5db;
      --text-muted: #9ca3af;
      --border-glow: rgba(236, 72, 153, 0.35);
      --border-subtle: rgba(192, 38, 211, 0.18);
      --box-shadow: 0 10px 35px -5px rgba(236, 72, 153, 0.2);
      --container-max: 1200px;
      --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);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(236, 72, 153, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 85% 65%, rgba(139, 92, 246, 0.16) 0%, transparent 45%),
        linear-gradient(180deg, #0b0716 0%, #110924 50%, #080511 100%);
      background-attachment: fixed;
      color: var(--text-gray);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
      min-height: 100vh;
    }

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

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

    /* 头部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      background: rgba(11, 7, 22, 0.88);
      border-bottom: 1px solid var(--border-subtle);
    }

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

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

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--text-white);
      text-shadow: 0 0 12px rgba(236, 72, 153, 0.6);
    }

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

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      color: var(--text-gray);
      font-weight: 500;
      border-radius: 6px;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      text-shadow: 0 0 8px #ec4899;
      background: rgba(236, 72, 153, 0.12);
    }

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

    .btn-cyber-primary {
      background: var(--neon-gradient);
      color: #fff;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: 30px;
      box-shadow: 0 0 16px rgba(236, 72, 153, 0.45);
      border: 1px solid rgba(255, 255, 255, 0.2);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      white-space: nowrap;
      cursor: pointer;
    }

    .btn-cyber-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 24px rgba(236, 72, 153, 0.7);
      color: #fff;
    }

    .btn-cyber-outline {
      border: 1px solid var(--neon-pink);
      color: #fff;
      background: rgba(236, 72, 153, 0.1);
      padding: 8px 18px;
      border-radius: 30px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      white-space: nowrap;
      cursor: pointer;
    }

    .btn-cyber-outline:hover {
      background: rgba(236, 72, 153, 0.25);
      box-shadow: 0 0 15px rgba(236, 72, 153, 0.4);
      color: #fff;
    }

    .menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--neon-pink);
      color: #fff;
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 1.2rem;
      cursor: pointer;
    }

    /* 首屏 Hero (无任何图片) */
    .hero-section {
      padding: 90px 0 70px;
      position: relative;
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 18px;
      border-radius: 50px;
      background: rgba(236, 72, 153, 0.14);
      border: 1px solid var(--neon-pink);
      color: #f472b6;
      font-size: 0.88rem;
      margin-bottom: 24px;
      letter-spacing: 0.5px;
      text-shadow: 0 0 10px rgba(244, 114, 182, 0.4);
    }

    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      font-weight: 800;
      line-height: 1.25;
      color: #fff;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
      text-shadow: 0 0 25px rgba(192, 38, 211, 0.4);
    }

    .hero-title-highlight {
      background: var(--neon-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      filter: drop-shadow(0 0 18px rgba(236, 72, 153, 0.6));
    }

    .hero-desc {
      font-size: 1.12rem;
      max-width: 820px;
      margin: 0 auto 34px;
      color: #d1d5db;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 50px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 14px;
      padding: 22px 16px;
      text-align: center;
      transition: var(--transition);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-pink);
      box-shadow: 0 0 20px rgba(236, 72, 153, 0.35);
    }

    .stat-num {
      font-size: 2.1rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 4px;
      text-shadow: 0 0 12px rgba(236, 72, 153, 0.7);
    }

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

    /* 模块通用样式 */
    .section-py {
      padding: 70px 0;
      border-top: 1px solid rgba(236, 72, 153, 0.12);
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px;
    }

    .section-tag {
      color: var(--neon-pink);
      font-weight: 600;
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      display: inline-block;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: clamp(1.6rem, 2.8vw, 2.3rem);
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
      text-shadow: 0 0 15px rgba(236, 72, 153, 0.35);
    }

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

    /* 通用卡片与网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .cyber-card {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 14px;
      padding: 26px 22px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .cyber-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--neon-gradient);
      opacity: 0;
      transition: var(--transition);
    }

    .cyber-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow);
      background: var(--bg-card-hover);
      box-shadow: 0 10px 30px -8px rgba(236, 72, 153, 0.3);
    }

    .cyber-card:hover::before {
      opacity: 1;
    }

    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(236, 72, 153, 0.15);
      border: 1px solid rgba(236, 72, 153, 0.4);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1.25rem;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-gray);
      line-height: 1.6;
    }

    /* 平台支持的大模型标签云 */
    .models-badge-wall {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      padding: 6px 14px;
      border-radius: 20px;
      background: rgba(192, 38, 211, 0.12);
      border: 1px solid rgba(236, 72, 153, 0.25);
      font-size: 0.85rem;
      color: #e5e7eb;
      transition: var(--transition);
    }

    .model-tag:hover {
      background: rgba(236, 72, 153, 0.25);
      border-color: var(--neon-pink);
      color: #fff;
      box-shadow: 0 0 10px rgba(236, 72, 153, 0.4);
    }

    /* 图文媒体展示 */
    .media-card-img {
      width: 100%;
      border-radius: 10px;
      overflow: hidden;
      margin-bottom: 16px;
      border: 1px solid var(--border-subtle);
      background: #000;
      aspect-ratio: 16 / 9;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.35s ease;
    }

    .media-card-img:hover img {
      transform: scale(1.04);
    }

    .media-square-container {
      aspect-ratio: 1 / 1;
    }

    /* 对比评测高亮区 */
    .eval-highlight-box {
      background: linear-gradient(135deg, rgba(236, 72, 153, 0.18) 0%, rgba(36, 20, 68, 0.9) 100%);
      border: 1px solid var(--neon-pink);
      border-radius: 16px;
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      margin-bottom: 30px;
      box-shadow: 0 0 25px rgba(236, 72, 153, 0.25);
    }

    .eval-score-num {
      font-size: 3.5rem;
      font-weight: 900;
      color: #fff;
      line-height: 1;
      text-shadow: 0 0 20px #ec4899;
    }

    .eval-stars {
      color: #facc15;
      font-size: 1.4rem;
      margin-top: 6px;
      letter-spacing: 2px;
    }

    .comparison-table-wrapper {
      overflow-x: auto;
      border-radius: 12px;
      border: 1px solid var(--border-glow);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
      background: var(--bg-card);
    }

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(236, 72, 153, 0.15);
      font-size: 0.94rem;
    }

    .comparison-table th {
      background: rgba(192, 38, 211, 0.2);
      color: #fff;
      font-weight: 700;
    }

    .comparison-table tr:hover td {
      background: rgba(236, 72, 153, 0.08);
    }

    .table-tag-yes {
      color: #34d399;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .table-tag-no {
      color: #9ca3af;
    }

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

    .step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-subtle);
      border-radius: 12px;
      padding: 24px 18px;
      position: relative;
    }

    .step-badge {
      display: inline-block;
      width: 32px;
      height: 32px;
      line-height: 30px;
      text-align: center;
      border-radius: 50%;
      background: var(--neon-gradient);
      color: #fff;
      font-weight: 700;
      font-size: 0.95rem;
      margin-bottom: 14px;
      box-shadow: 0 0 10px rgba(236, 72, 153, 0.6);
    }

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

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

    .faq-item.open {
      border-color: var(--border-glow);
    }

    .faq-question {
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      color: #fff;
      user-select: none;
      font-size: 1rem;
    }

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

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 22px;
      color: var(--text-gray);
      font-size: 0.94rem;
      line-height: 1.7;
    }

    .faq-item.open .faq-answer {
      max-height: 250px;
      padding-bottom: 18px;
    }

    /* 客户评价 */
    .review-author-box {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #c026d3, #3b82f6);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
      font-size: 1rem;
    }

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

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

    /* 需求匹配表单 */
    .form-container {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--box-shadow);
      max-width: 780px;
      margin: 0 auto;
    }

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

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      color: #e5e7eb;
      margin-bottom: 8px;
      font-weight: 500;
    }

    .form-control {
      width: 100%;
      background: rgba(11, 7, 22, 0.7);
      border: 1px solid rgba(236, 72, 153, 0.3);
      padding: 12px 16px;
      border-radius: 8px;
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--neon-pink);
      box-shadow: 0 0 12px rgba(236, 72, 153, 0.4);
    }

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

    /* 资讯与友情链接 */
    .article-link-item {
      display: block;
      padding: 12px 16px;
      background: rgba(192, 38, 211, 0.08);
      border: 1px solid rgba(236, 72, 153, 0.2);
      border-radius: 8px;
      margin-bottom: 10px;
      color: #e5e7eb;
      font-size: 0.93rem;
      transition: var(--transition);
    }

    .article-link-item:hover {
      background: rgba(236, 72, 153, 0.2);
      color: #fff;
      transform: translateX(4px);
    }

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

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

    .friend-links-box a:hover {
      color: #fff;
      background: rgba(236, 72, 153, 0.3);
    }

    /* 宣传与形象展示区 */
    .banner-showcase-box {
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-glow);
      box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
      margin-bottom: 40px;
    }

    .banner-showcase-box img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 浮动客服入口 */
    .float-service {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--neon-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 0 16px rgba(236, 72, 153, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.4);
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    .qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #110924;
      border: 1px solid var(--neon-pink);
      padding: 12px;
      border-radius: 12px;
      box-shadow: 0 0 25px rgba(0, 0, 0, 0.8);
      display: none;
      width: 170px;
      text-align: center;
    }

    .qr-popup img {
      width: 100%;
      height: auto;
      border-radius: 6px;
      display: block;
      margin-bottom: 6px;
    }

    .qr-popup p {
      font-size: 0.8rem;
      color: #fff;
    }

    .float-service:hover .qr-popup {
      display: block;
    }

    /* 页脚 */
    .site-footer {
      background: #07040e;
      border-top: 1px solid rgba(236, 72, 153, 0.25);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 36px;
    }

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

    .footer-col ul {
      list-style: none;
    }

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

    .footer-col ul li a:hover {
      color: #ec4899;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 14px;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-stats-grid,
      .grid-4,
      .steps-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-menu {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-menu.active {
        display: block;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #0d081b;
        border-bottom: 1px solid var(--border-glow);
        padding: 20px;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 14px;
      }
    }

    @media (max-width: 640px) {
      .hero-stats-grid,
      .grid-3,
      .grid-2,
      .steps-row,
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        text-align: center;
      }
      .header-actions .btn-cyber-outline {
        display: none;
      }
    }