page {
  background: #f5f5f5;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

/* 深色模式 */
@media (prefers-color-scheme: dark) {
  page {
    background: #1a1a1a;
  }
}