/* roulang page: index */
:root {
      --primary-color: #1a56db;
      --accent-color: #0e9f6e;
      --warm-color: #f59e0b;
      --text-main: #111827;
      --text-muted: #4b5563;
      --bg-light: #f9fafb;
    }
    body {
      font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-shadow:hover {
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.1);
      transform: translateY(-4px);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }