/* roulang page: index */
:root {
      --primary-blue: #1D4ED8;
      --accent-green: #059669;
      --alert-orange: #F97316;
      --bg-light: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-light);
      color: var(--text-body);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .custom-shadow {
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
    }
    .hover-lift {
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .hover-lift:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
    }
    .section-anchor {
      scroll-margin-top: 96px;
    }
    .accordion-content {
      transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
      max-height: 0;
      opacity: 0;
      overflow: hidden;
    }
    .accordion-content.open {
      max-height: 240px;
      opacity: 1;
    }