/* 全局变量 - 亮紫绚烂风 */
    :root {
      --primary: #7c3aed;
      --primary-hover: #6d28d9;
      --primary-light: #f3e8ff;
      --primary-dark: #4c1d95;
      --secondary: #c084fc;
      --accent: #ec4899;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 4px rgba(124, 58, 237, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(124, 58, 237, 0.1), 0 8px 10px -6px rgba(124, 58, 237, 0.05);
      --shadow-lg: 0 20px 30px -10px rgba(124, 58, 237, 0.15);
      --radius: 12px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      width: 100%;
    }

    /* 统一居中容器 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary-dark), var(--primary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* CSS规则严格设定 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
      gap: 0;
    }

    .nav-item {
      position: relative;
    }

    .nav-link {
      display: block;
      padding: 8px 12px;
      color: var(--text-main);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), #9333ea);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
      background: linear-gradient(135deg, #6d28d9, #7e22ce);
    }

    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background: transparent;
    }

    .btn-outline:hover {
      background: var(--primary-light);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 首屏 Hero 区域 (绝对不含任何图片资源) */
    .hero-section {
      padding: 90px 0 70px;
      background: radial-gradient(circle at 50% 10%, rgba(192, 132, 252, 0.15), transparent 70%),
                  linear-gradient(180deg, #f3e8ff 0%, var(--bg-main) 100%);
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content {
      max-width: 680px;
    }

    .badge-tag {
      display: inline-block;
      padding: 6px 14px;
      background: rgba(124, 58, 237, 0.1);
      border: 1px solid rgba(124, 58, 237, 0.2);
      color: var(--primary-dark);
      border-radius: 50px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 38px;
      line-height: 1.25;
      font-weight: 900;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 17px;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-btns {
      display: flex;
      gap: 16px;
      align-items: center;
      flex-wrap: wrap;
    }

    .hero-btn-large {
      padding: 14px 32px;
      font-size: 16px;
      border-radius: 10px;
    }

    /* 炫彩数据屏卡片替代盲目图片 */
    .hero-visual {
      background: linear-gradient(135deg, #ffffff, #faf5ff);
      border: 1px solid rgba(192, 132, 252, 0.4);
      border-radius: 20px;
      padding: 28px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .visual-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      border-bottom: 1px solid #f1f5f9;
      margin-bottom: 20px;
    }

    .visual-dots {
      display: flex;
      gap: 6px;
    }

    .visual-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #cbd5e1;
    }

    .visual-dot:nth-child(1) { background: #ef4444; }
    .visual-dot:nth-child(2) { background: #f59e0b; }
    .visual-dot:nth-child(3) { background: #10b981; }

    .visual-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
    }

    .visual-stats-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .stat-box {
      background: #ffffff;
      padding: 16px;
      border-radius: 12px;
      border: 1px solid #f1f5f9;
      box-shadow: var(--shadow-sm);
    }

    .stat-val {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary-dark);
    }

    .stat-lbl {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 模组通用标题 */
    .section-title-wrap {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 50px;
    }

    .section-tag {
      color: var(--primary);
      font-weight: 700;
      font-size: 13px;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* 板块区域间隔 */
    .page-section {
      padding: 75px 0;
      border-bottom: 1px solid #f1f5f9;
    }

    .bg-light-purple {
      background: #faf5ff;
    }

    /* 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;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--secondary);
    }

    .card-icon-box {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: bold;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

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

    /* 图片与文字混排 */
    .img-wrapper {
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .ai-page-image {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }

    .img-wrapper:hover .ai-page-image {
      transform: scale(1.02);
    }

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

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

    .step-number {
      font-size: 32px;
      font-weight: 900;
      color: var(--secondary);
      opacity: 0.7;
      margin-bottom: 10px;
    }

    /* 对比表格 */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table th {
      background: #faf5ff;
      color: var(--primary-dark);
      font-weight: 700;
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .badge-recommend {
      background: var(--primary-light);
      color: var(--primary-dark);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: bold;
    }

    .rating-box {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      text-align: center;
      margin-bottom: 30px;
    }

    .rating-score {
      font-size: 42px;
      font-weight: 900;
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 20px;
      margin: 6px 0;
    }

    /* FAQ 面板 */
    .faq-accordion {
      max-width: 850px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-header {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      transition: var(--transition);
    }

    .faq-header:hover {
      color: var(--primary);
    }

    .faq-header::after {
      content: '+';
      font-size: 20px;
      color: var(--primary);
      font-weight: 300;
    }

    .faq-item.active .faq-header::after {
      content: '−';
    }

    .faq-body {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-body {
      padding: 0 24px 18px 24px;
      max-height: 300px;
    }

    /* 用户评论 */
    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    .author-info h4 {
      font-size: 15px;
      color: var(--text-main);
    }

    .author-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 表单与联系 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .form-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: var(--transition);
      background: #ffffff;
      color: var(--text-main);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
    }

    .qr-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .qr-card img {
      max-width: 180px;
      height: auto;
      border-radius: 8px;
      margin-bottom: 12px;
      border: 1px solid var(--border-color);
    }

    /* 文章列表与友情链接 */
    .article-list {
      list-style: none;
    }

    .article-item {
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .article-item a {
      color: var(--text-main);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: var(--transition);
    }

    .article-item a:hover {
      color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }

    .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;
    }

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

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

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 14px;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: #ffffff;
    }

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

    .friend-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 13px;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
      transition: var(--transition);
    }

    .friend-links a:hover {
      color: #ffffff;
      background: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    /* 浮动组件 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      text-decoration: none;
      font-size: 18px;
      transition: var(--transition);
      cursor: pointer;
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--primary-dark);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-grid, .contact-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .grid-3, .grid-4, .steps-list {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-title {
        font-size: 30px;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .grid-2, .grid-3, .grid-4, .steps-list {
        grid-template-columns: 1fr;
      }
      .hero-section {
        padding: 50px 0 40px;
      }
    }