/* roulang page: index */
:root {
      --primary: #1A56DB;
      --primary-light: #3F83F8;
      --secondary: #0E9F6E;
      --bg-base: #F8FAFC;
      --bg-dark: #0F172A;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
      --card-hover-shadow: 0 10px 20px -3px rgba(26, 86, 219, 0.1);
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      transition: all 0.25s ease-in-out;
    }
    .custom-card:hover {
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-2px);
    }
    .custom-btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      transition: all 0.2s ease-in-out;
    }
    .custom-btn-primary:hover {
      background-color: #1e429f;
      transform: translateY(-1px);
    }
    .custom-btn-primary:active {
      transform: translateY(0);
    }
    .custom-btn-primary:focus-visible {
      outline: 2px solid var(--primary-light);
      outline-offset: 2px;
    }
    .custom-btn-secondary {
      background-color: #FFFFFF;
      color: var(--primary);
      border: 1px solid var(--border-color);
      transition: all 0.2s ease-in-out;
    }
    .custom-btn-secondary:hover {
      background-color: #F1F5F9;
      border-color: #CBD5E1;
    }