body {
  font-family: Georgia, "Songti SC", "STSong", serif;
  color: #222;
  background: #fff;
  max-width: 760px;
  margin: 0 auto;
  padding: 20px 16px 60px;
  line-height: 1.7;
}
header {
  border-bottom: 1px solid #ddd;
  margin-bottom: 24px;
  padding-bottom: 12px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}
header h1 { font-size: 20px; margin: 0; }
header h1 a { color: #222; text-decoration: none; }
nav a { color: #555; text-decoration: none; margin-left: 8px; }
h1.issue-title {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 26px;
  margin-bottom: 4px;
}
p.issue-date { color: #888; font-size: 14px; margin-top: 0; }
h2 {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 18px;
  border-left: 4px solid #333;
  padding-left: 8px;
  margin-top: 32px;
}
ul.items { list-style: none; padding-left: 0; }
ul.items li { margin-bottom: 16px; }
ul.items a { color: #0645ad; text-decoration: none; }
ul.items a:hover { text-decoration: underline; }
ul.archive { list-style: none; padding-left: 0; }
ul.archive li { margin-bottom: 8px; }
footer {
  margin-top: 48px;
  padding-top: 12px;
  border-top: 1px solid #ddd;
  color: #999;
  font-size: 13px;
}