:root {
      --bg-main: #0c0817;
      --bg-card: #150f28;
      --bg-card-hover: #1f163d;
      --accent-pink: #ff2a9d;
      --accent-purple: #9d4edd;
      --accent-cyan: #00f5d4;
      --text-main: #f5f2fd;
      --text-muted: #aca3c6;
      --border-glow: rgba(255, 42, 157, 0.25);
      --border-hover: rgba(0, 245, 212, 0.5);
      --grad-neon: linear-gradient(135deg, #ff2a9d 0%, #9d4edd 50%, #00f5d4 100%);
      --grad-btn: linear-gradient(90deg, #ff2a9d, #9d4edd);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      background-color: var(--bg-main);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(12, 8, 23, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-glow);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 1px;
      color: #fff;
      text-shadow: 0 0 10px rgba(255, 42, 157, 0.6);
    }
    .nav-links {
      display: flex;
      gap: 0;
      align-items: center;
      list-style: none;
    }
    .nav-links li a {
      padding: 8px 12px;
      font-size: 14px;
      color: var(--text-muted);
      border-radius: 6px;
      white-space: nowrap;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: #fff;
      text-shadow: 0 0 8px var(--accent-pink);
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.3s ease;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--grad-btn);
      color: #fff;
      box-shadow: 0 0 15px rgba(255, 42, 157, 0.4);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(255, 42, 157, 0.7);
    }
    .btn-outline {
      background: rgba(255, 255, 255, 0.05);
      border-color: var(--accent-pink);
      color: #fff;
    }
    .btn-outline:hover {
      background: rgba(255, 42, 157, 0.15);
      border-color: var(--accent-cyan);
      box-shadow: 0 0 15px rgba(0, 245, 212, 0.3);
    }
    .btn-large {
      padding: 14px 32px;
      font-size: 16px;
      border-radius: 30px;
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .menu-toggle span {
      width: 24px;
      height: 2px;
      background: #fff;
      transition: 0.3s;
    }

    /* Hero 首屏 - 纯代码构建科技感，严禁图片 */
    .hero-section {
      position: relative;
      padding: 90px 0 70px;
      text-align: center;
      background: radial-gradient(circle at 50% 30%, rgba(157, 78, 221, 0.25) 0%, rgba(12, 8, 23, 0) 70%),
                  linear-gradient(180deg, #100a20 0%, #0c0817 100%);
      border-bottom: 1px solid var(--border-glow);
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 18px;
      border-radius: 20px;
      background: rgba(255, 42, 157, 0.12);
      border: 1px solid var(--accent-pink);
      color: var(--accent-cyan);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
      letter-spacing: 1px;
      box-shadow: 0 0 12px rgba(255, 42, 157, 0.3);
    }
    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #ffffff;
      text-shadow: 0 0 20px rgba(157, 78, 221, 0.5);
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 960px;
      margin: 0 auto;
    }
    .metric-card {
      background: rgba(21, 15, 40, 0.7);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 20px 16px;
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
    }
    .metric-card:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-4px);
      box-shadow: 0 8px 20px rgba(0, 245, 212, 0.2);
    }
    .metric-num {
      font-size: 26px;
      font-weight: 800;
      color: var(--accent-pink);
      margin-bottom: 6px;
      font-family: monospace;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 模块通用样式 */
    .section-block {
      padding: 70px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      margin-bottom: 44px;
    }
    .section-tag {
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 2px;
      color: var(--accent-cyan);
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 28px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
      text-shadow: 0 0 10px rgba(255, 42, 157, 0.3);
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 网格与卡片 */
    .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: 28px;
      align-items: center;
    }
    .cyber-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 14px;
      padding: 26px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .cyber-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--grad-neon);
      opacity: 0.3;
      transition: opacity 0.3s ease;
    }
    .cyber-card:hover {
      transform: translateY(-5px);
      border-color: var(--accent-pink);
      background: var(--bg-card-hover);
      box-shadow: 0 10px 25px rgba(157, 78, 221, 0.25);
    }
    .cyber-card:hover::before {
      opacity: 1;
    }
    .card-icon-badge {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(255, 42, 157, 0.15);
      border: 1px solid var(--accent-pink);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: #fff;
      margin-bottom: 16px;
    }
    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 标签云与模型生态 */
    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }
    .model-tag {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(157, 78, 221, 0.4);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: #e5dff7;
      transition: all 0.25s ease;
    }
    .model-tag:hover {
      background: rgba(255, 42, 157, 0.2);
      border-color: var(--accent-cyan);
      color: #fff;
      transform: scale(1.05);
      box-shadow: 0 0 10px rgba(0, 245, 212, 0.4);
    }

    /* 流程步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .flow-step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 24px 20px;
      position: relative;
    }
    .step-number {
      font-size: 32px;
      font-weight: 900;
      color: rgba(255, 42, 157, 0.3);
      line-height: 1;
      margin-bottom: 12px;
      font-family: monospace;
    }

    /* 对比表格 */
    .table-container {
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: 14px;
      border: 1px solid var(--border-glow);
      padding: 10px;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .compare-table th {
      background: rgba(255, 42, 157, 0.08);
      color: var(--accent-cyan);
      font-weight: 700;
      font-size: 15px;
    }
    .compare-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }
    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255, 42, 157, 0.2);
      border: 1px solid var(--accent-pink);
      padding: 4px 12px;
      border-radius: 20px;
      font-weight: 800;
      color: #fff;
    }

    /* 案例展示与素材图 */
    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      overflow: hidden;
      transition: all 0.3s ease;
    }
    .media-card:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-4px);
    }
    .media-img-holder {
      width: 100%;
      height: 220px;
      overflow: hidden;
      background: #090513;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .media-card:hover .media-img-holder img {
      transform: scale(1.05);
    }
    .media-body {
      padding: 18px;
    }

    /* FAQ 折叠 */
    .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-glow);
      border-radius: 10px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 22px;
      cursor: pointer;
      font-weight: 700;
      font-size: 16px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      color: #fff;
    }
    .faq-question:hover {
      color: var(--accent-cyan);
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s;
      color: var(--accent-pink);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: rgba(12, 8, 23, 0.4);
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
      padding: 0 22px;
    }
    .faq-item.active .faq-answer {
      padding: 14px 22px 20px;
      max-height: 240px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 用户评论 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 22px;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--grad-btn);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #fff;
    }
    .review-info h4 {
      font-size: 15px;
      color: #fff;
    }
    .review-info span {
      font-size: 12px;
      color: var(--accent-cyan);
    }
    .review-content {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 需求匹配表单 */
    .form-box {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 36px;
      max-width: 760px;
      margin: 0 auto;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: #e5dff7;
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: rgba(12, 8, 23, 0.8);
      border: 1px solid rgba(157, 78, 221, 0.4);
      border-radius: 8px;
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: all 0.3s;
    }
    .form-control:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 10px rgba(0, 245, 212, 0.3);
    }
    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 加盟代理与横幅展示 */
    .banner-card-group {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
      margin-top: 30px;
    }
    .promo-banner-item {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-glow);
      background: #110924;
    }
    .promo-banner-item img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 底部与链接 */
    .site-footer {
      background: #080510;
      border-top: 1px solid var(--border-glow);
      padding: 60px 0 30px;
      color: var(--text-muted);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col h3 {
      color: #fff;
      font-size: 16px;
      margin-bottom: 18px;
      border-left: 3px solid var(--accent-pink);
      padding-left: 10px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links a:hover {
      color: var(--accent-cyan);
    }
    .footer-qr-wrap {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }
    .footer-qr-wrap img {
      width: 110px;
      height: 110px;
      border-radius: 8px;
      border: 1px solid var(--accent-pink);
      padding: 4px;
      background: #fff;
    }
    .friendly-links-wrap {
      padding: 20px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }
    .friendly-links-wrap span {
      color: #fff;
      font-weight: 600;
    }
    .friendly-links-wrap a {
      color: var(--text-muted);
      font-size: 13px;
    }
    .friendly-links-wrap a:hover {
      color: var(--accent-pink);
    }
    .articles-block {
      padding: 20px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 13px;
    }
    .articles-block-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 8px;
    }
    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 13px;
      color: #7b7294;
    }

    /* 悬浮客服 */
    .float-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--grad-btn);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(255, 42, 157, 0.4);
      cursor: pointer;
      font-size: 20px;
      border: none;
      transition: all 0.3s;
    }
    .float-btn:hover {
      transform: scale(1.1);
      box-shadow: 0 6px 20px rgba(0, 245, 212, 0.6);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .flow-steps { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .banner-card-group { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .menu-toggle { display: flex; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #0f0a20;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-glow);
      }
      .nav-links.show { display: flex; }
      .hero-title { font-size: 28px; }
      .hero-subtitle { font-size: 15px; }
      .grid-2, .grid-3, .grid-4, .review-grid, .flow-steps, .hero-metrics { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }