:root {
      --bg-main: #0c0817;
      --bg-surface: #160f29;
      --bg-card: rgba(30, 20, 56, 0.7);
      --bg-card-hover: rgba(45, 30, 84, 0.85);
      --accent-pink: #ff2a8d;
      --accent-purple: #9d3bf6;
      --accent-cyan: #00f2fe;
      --text-bright: #ffffff;
      --text-muted: #b9b2cb;
      --border-glow: rgba(255, 42, 141, 0.25);
      --border-purple: rgba(157, 59, 246, 0.35);
      --glow-pink: 0 0 20px rgba(255, 42, 141, 0.4);
      --glow-purple: 0 0 25px rgba(157, 59, 246, 0.45);
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-main);
      color: var(--text-bright);
    }

    body {
      background: radial-gradient(circle at 10% 20%, #1e0938 0%, #0c0817 70%);
      min-height: 100vh;
      overflow-x: hidden;
      line-height: 1.6;
    }

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

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

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

    .brand-box .ai-page-logo {
      height: 38px;
      width: auto;
      filter: drop-shadow(0 0 8px var(--accent-pink));
    }

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      background: linear-gradient(90deg, #ffffff, #ff71b2);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: 0.5px;
    }

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

    .nav-links li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      padding: 8px 12px;
      border-radius: 6px;
      transition: all 0.25s ease;
    }

    .nav-links li a:hover {
      color: var(--text-bright);
      background: rgba(157, 59, 246, 0.15);
      text-shadow: 0 0 8px var(--accent-purple);
    }

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

    .btn-nav-primary {
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      color: #ffffff;
      padding: 9px 20px;
      border-radius: 20px;
      text-decoration: none;
      font-size: 13px;
      font-weight: 600;
      box-shadow: var(--glow-pink);
      border: 1px solid rgba(255, 255, 255, 0.2);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(255, 42, 141, 0.7);
    }

    .nav-toggle {
      display: none;
      background: transparent;
      border: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }

    /* 首屏 Hero (无图片，纯科技氛围) */
    .hero-section {
      padding: 100px 0 80px;
      text-align: center;
      position: relative;
      background: radial-gradient(ellipse at 50% 10%, rgba(157, 59, 246, 0.25) 0%, transparent 60%);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(255, 42, 141, 0.12);
      border: 1px solid var(--accent-pink);
      border-radius: 30px;
      color: #ff7ebb;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(255, 42, 141, 0.2);
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
      color: #ffffff;
    }

    .hero-title span {
      background: linear-gradient(135deg, #ff2a8d 0%, #00f2fe 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      filter: drop-shadow(0 0 20px rgba(255, 42, 141, 0.3));
    }

    .hero-sub {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
      font-weight: 400;
    }

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

    .btn-hero-main {
      padding: 14px 34px;
      background: linear-gradient(90deg, #ff2a8d, #9d3bf6);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      border-radius: 30px;
      text-decoration: none;
      box-shadow: 0 0 30px rgba(255, 42, 141, 0.5);
      border: 1px solid rgba(255, 255, 255, 0.3);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-hero-main:hover {
      transform: scale(1.04);
      box-shadow: 0 0 40px rgba(255, 42, 141, 0.8);
    }

    .btn-hero-sub {
      padding: 14px 30px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-purple);
      color: #ffffff;
      font-size: 16px;
      font-weight: 600;
      border-radius: 30px;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    .btn-hero-sub:hover {
      background: rgba(157, 59, 246, 0.2);
      border-color: var(--accent-pink);
    }

    .hero-stats-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 40px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      padding: 24px 16px;
      border-radius: 12px;
      backdrop-filter: blur(8px);
      text-align: center;
      transition: transform 0.25s;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--accent-pink);
    }

    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: #ff4fa1;
      margin-bottom: 4px;
      font-family: monospace;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 通用Section */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-head {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 2px;
      color: var(--accent-pink);
      font-weight: 700;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto;
    }

    /* 卡片网格 */
    .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;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-purple);
      border-radius: 14px;
      padding: 26px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--accent-pink), var(--accent-purple));
      opacity: 0;
      transition: opacity 0.3s ease;
    }

    .feature-card:hover {
      background: var(--bg-card-hover);
      transform: translateY(-5px);
      box-shadow: 0 10px 30px rgba(157, 59, 246, 0.2);
      border-color: var(--accent-pink);
    }

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

    .feature-icon {
      font-size: 26px;
      color: var(--accent-pink);
      margin-bottom: 14px;
      display: inline-block;
    }

    .feature-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #ffffff;
    }

    .feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 平台支持标签云 */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-tag-item {
      background: rgba(157, 59, 246, 0.12);
      border: 1px solid rgba(157, 59, 246, 0.3);
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 13px;
      color: #d1b8ff;
      transition: all 0.2s;
    }

    .model-tag-item:hover {
      background: var(--accent-pink);
      color: #fff;
      border-color: var(--accent-pink);
      box-shadow: var(--glow-pink);
    }

    /* 对比表格 */
    .table-container {
      background: var(--bg-card);
      border: 1px solid var(--border-purple);
      border-radius: 14px;
      overflow-x: auto;
      padding: 10px;
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(157, 59, 246, 0.15);
    }

    .eval-table th {
      background: rgba(22, 15, 41, 0.9);
      color: #ffffff;
      font-weight: 700;
    }

    .eval-table tr:hover td {
      background: rgba(157, 59, 246, 0.08);
    }

    .highlight-cell {
      color: #ff3399;
      font-weight: 700;
    }

    .rating-badge {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 20px;
      background: linear-gradient(90deg, #ff2a8d, #9d3bf6);
      color: #ffffff;
      font-weight: 800;
      font-size: 12px;
    }

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

    .step-box {
      background: var(--bg-card);
      border: 1px solid var(--border-purple);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--accent-pink);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      font-weight: 800;
      box-shadow: 0 0 15px var(--accent-pink);
    }

    /* 案例展示画廊 */
    .case-gallery {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .case-img-wrap {
      width: 100%;
      height: 240px;
      overflow: hidden;
      background: #110c22;
    }

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

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

    .case-info {
      padding: 20px;
    }

    .case-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .case-meta {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 媒体海报行 */
    .media-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

    .media-strip .ai-page-image {
      width: 100%;
      height: 180px;
      object-fit: cover;
      border-radius: 10px;
      border: 1px solid var(--border-purple);
      transition: 0.3s;
    }

    .media-strip .ai-page-image:hover {
      border-color: var(--accent-pink);
      transform: scale(1.02);
    }

    /* 客户评价卡片 */
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: 12px;
      padding: 22px;
      position: relative;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #fff;
    }

    .review-meta h4 {
      font-size: 15px;
      color: #ffffff;
    }

    .review-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }

    .review-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-purple);
      border-radius: 10px;
      overflow: hidden;
      transition: all 0.25s;
    }

    .faq-item.active {
      border-color: var(--accent-pink);
      box-shadow: 0 0 15px rgba(255, 42, 141, 0.15);
    }

    .faq-header {
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 15px;
    }

    .faq-header:hover {
      color: #ff7ebb;
    }

    .faq-icon {
      transition: transform 0.3s;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
      color: var(--accent-pink);
    }

    .faq-body {
      padding: 0 20px 16px;
      font-size: 14px;
      color: var(--text-muted);
      display: none;
      line-height: 1.6;
      border-top: 1px solid rgba(157, 59, 246, 0.1);
      padding-top: 12px;
    }

    /* 表单模块 */
    .form-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-pink, var(--accent-pink));
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--glow-purple);
    }

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

    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: #d1c8e6;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      background: #0d081b;
      border: 1px solid var(--border-purple);
      border-radius: 8px;
      color: #fff;
      font-size: 14px;
      outline: none;
      transition: 0.2s;
    }

    .form-control:focus {
      border-color: var(--accent-pink);
      box-shadow: 0 0 10px rgba(255, 42, 141, 0.3);
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(90deg, #ff2a8d, #9d3bf6);
      border: none;
      border-radius: 8px;
      color: #fff;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      box-shadow: var(--glow-pink);
      transition: 0.25s;
    }

    .btn-submit:hover {
      opacity: 0.95;
      transform: translateY(-2px);
    }

    /* 行业资讯/文章列表 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-purple);
      border-radius: 10px;
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-link {
      color: #ffffff;
      text-decoration: none;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 8px;
      display: inline-block;
      transition: color 0.2s;
    }

    .article-link:hover {
      color: var(--accent-pink);
    }

    .article-time {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 底部通用 */
    .site-footer {
      background: #07040f;
      border-top: 1px solid var(--border-purple);
      padding: 60px 0 30px;
      color: var(--text-muted);
      font-size: 13px;
    }

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

    .footer-col h3 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
      font-weight: 700;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links-list a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-links-list a:hover {
      color: var(--accent-pink);
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }

    .friend-links a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s;
      font-size: 12px;
    }

    .friend-links a:hover {
      color: #ff7ebb;
    }

    .qr-wrap {
      display: inline-block;
      padding: 6px;
      background: #fff;
      border-radius: 8px;
      margin-top: 10px;
    }

    .qr-wrap img {
      width: 100px;
      height: 100px;
      display: block;
    }

    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 12px;
    }

    /* 悬浮客服挂件 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }

    .kefu-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ff2a8d, #9d3bf6);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 22px;
      box-shadow: 0 0 20px rgba(255, 42, 141, 0.6);
      cursor: pointer;
      text-decoration: none;
      border: 1px solid rgba(255, 255, 255, 0.4);
    }

    .back-top {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--bg-card);
      border: 1px solid var(--border-purple);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 14px;
      display: none;
    }

    /* 响应式断点适配 */
    @media (max-width: 992px) {
      .hero-title { font-size: 32px; }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .media-strip { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #0e091b;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-purple);
      }
      .nav-links.active { display: flex; }
      .nav-toggle { display: block; }
      .hero-stats-bar { grid-template-columns: repeat(2, 1fr); }
      .grid-3, .grid-4, .grid-2, .case-gallery, .article-list, .footer-grid, .steps-grid { grid-template-columns: 1fr; }
      .hero-title { font-size: 26px; }
      .section-title { font-size: 24px; }
    }