html,
body {
  margin: 0;
  padding: 0;
  background: #f5f6f8;
  color: #1a1a1a;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei',
    sans-serif;
  line-height: 1.65;
  font-size: 15px;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 48px;
  box-sizing: border-box;
}

h1 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 600;
}

.meta {
  margin: 0 0 20px;
  font-size: 13px;
  color: #666;
}

.content {
  background: #fff;
  border-radius: 12px;
  padding: 20px 16px;
  white-space: pre-wrap;
  word-break: break-word;
}