/* roulang page: index */
/* 品牌设计变量与视觉微调 */
    :root {
      --primary: #3B82C4;     /* 商务蓝主色 */
      --primary-dark: #2563A0;
      --accent: #F59E0B;      /* 活力橙辅色 */
      --accent-dark: #D97706;
      --gray-bg: #F8FAFC;
      --gray-light: #F1F5F9;
      --text-main: #1E293B;
      --text-secondary: #64748B;
      --text-muted: #94A3B8;
      --card-shadow: 0 8px 20px rgba(0, 0, 0, 0.04), 0 2px 6px rgba(0, 0, 0, 0.02);
      --card-shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
      --border-light: #E2E8F0;
      --radius-xl: 1.5rem;
      --radius-lg: 1rem;
    }    

    body {
      font-family: 'Inter', "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 2rem;
    }

    /* 导航滚动效果 */
    .nav-scrolled {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 6px 12px -6px rgba(0, 0, 0, 0.04);
    }

    /* 卡片/按钮悬停动效 */
    .hover-lift {
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .hover-lift:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
    }

    .image-scale {
      transition: transform 0.4s ease;
    }
    .card:hover .image-scale {
      transform: scale(1.05);
    }

    /* FAQ 折叠动画 */
    .faq-content {
      transition: max-height 0.4s ease, padding 0.3s ease, opacity 0.3s ease;
      max-height: 0;
      overflow: hidden;
      opacity: 0;
    }
    .faq-item.open .faq-content {
      max-height: 200px;
      padding-top: 1rem;
      padding-bottom: 0.5rem;
      opacity: 1;
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    .faq-icon {
      transition: transform 0.3s ease;
    }

    /* 服务序号装饰风格 */
    .service-order {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--primary);
      opacity: 0.1;
      line-height: 1;
      position: absolute;
      top: -20px;
      left: -12px;
    }

    /* 杂志栅格碎片化 */
    .magazine-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr 1fr;
      gap: 1.5rem;
    }
    @media (max-width: 768px) {
      .magazine-grid {
        grid-template-columns: 1fr;
      }
    }

    input:focus, textarea:focus {
      outline: none;
      border-bottom-color: var(--primary);
      box-shadow: 0 2px 0 var(--primary);
    }
    
    @media (max-width: 640px) {
      .container-custom {
        padding: 0 1.5rem;
      }
    }