* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", "Microsoft YaHei", -apple-system, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #fafafa;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
  text-align: center;
}

h1 {
  margin-bottom: 1rem;
}

code {
  background: #eee;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

a {
  color: #0366d6;
}