body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: #f7f7f7;
  color: #222;
  line-height: 1.8;
}

.container {
  max-width: 800px;
  margin: 40px auto;
  background: #fff;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

h1, h2 {
  margin-top: 0;
}

a {
  color: #0b57d0;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  margin-top: 40px;
  color: #666;
  font-size: 14px;
}

figcaption {
  text-align: center;
}