:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #fff;
  color: #000;
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

main {
  text-align: center;
  font-size: 16px;
  line-height: 1.9;
  font-weight: 400;
  animation: appear 700ms ease-out both;
}

p { margin: 0; }

@keyframes appear {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  main { animation: none; }
}