/* roulang page: index */
:root {
      --primary: #0A2540;
      --accent: #00D4B2;
      --warning: #FF5C38;
      --bg-light: #F8FAFD;
      --dark: #06121E;
      --text: #1A202C;
      --muted: #5A6A85;
      --border: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text);
      background-color: var(--bg-light);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Lantinghei SC", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
    }
    .custom-shadow {
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    }
    .hover-lift {
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .hover-lift:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 20px -3px rgba(10, 37, 64, 0.08), 0 4px 6px -2px rgba(10, 37, 64, 0.04);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] .arrow-icon {
      transform: rotate(45deg);
    }