/* roulang page: index */
:root {
      --primary: #1e3a8a;
      --primary-light: #2563eb;
      --accent: #06b6d4;
      --bg-base: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-card-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .custom-card-shadow:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 30px -4px rgba(15, 23, 42, 0.1), 0 4px 10px -2px rgba(15, 23, 42, 0.05);
    }
    .nav-indicator {
      position: relative;
    }
    .nav-indicator::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background-color: var(--primary-light);
      transition: width 0.2s ease-in-out;
    }
    .nav-indicator:hover::after {
      width: 100%;
    }