:root {
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: #111;
  background: #fff;
  line-height: 1.7;
}

main {
  max-width: 860px;
  margin: 36px auto 64px;
  padding: 0 20px;
}

header {
  margin-bottom: 20px;
}

h1 {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 10px;
}

h2 {
  font-size: 18px;
  margin: 28px 0 10px;
}

h3 {
  font-size: 16px;
  margin: 20px 0 8px;
}

p {
  margin: 8px 0;
}

ul,
ol {
  padding-left: 22px;
  margin: 8px 0;
}

li {
  margin: 6px 0;
}

hr {
  border: none;
  border-top: 1px solid #e5e5e5;
  margin: 24px 0;
}

blockquote {
  margin: 12px 0;
  padding-left: 12px;
  border-left: 3px solid #e5e5e5;
  color: #555;
}

.nav {
  font-size: 13px;
  color: #555;
}

.nav a {
  color: #0b57d0;
  text-decoration: none;
  margin-right: 12px;
}

.nav a:last-child {
  margin-right: 0;
}

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

a:hover {
  text-decoration: underline;
}

.listing {
  margin-top: 16px;
}

.listing li {
  margin: 10px 0;
}