default.css

html {
  width: 100%;
}

body {
  width: 600px;
  margin: 0 auto;
  font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,sans-serif;
  line-height: 1.5;
}

body a {
  color: #000;
  text-decoration: underline;
}

body > p.first {
  /*color: rgb(60, 112, 198);*/
  /*margin-top: 40px;*/
  /*font-weight: bold;*/
}

p, h1, h2, h3, ul, ol, pre, img {
  margin: 10px 0;
  color: #000;
}

p {
  font-size: 16px;
  line-height: 1.5;
  margin: 16px 0;
}

p.author {
  color: #999;
}

h2 {
  margin-top: 60px;
  font-size: 1.5em;
  font-weight: bold;
  color: #b5495b;
  text-align: left;
  margin-bottom: 0;
}

h2 span {
  /*display: inline-block;*/
  /*border-bottom: 2px solid rgb(60, 112, 198);*/
}

h3 {
  margin-top: 40px;
  font-size: 1.17em;
  font-weight: bold;
  margin-bottom: 0;
  color: rgb(60, 112, 198);
}

ul, ol {
  margin-left: 12px;
}
li {
  margin-left: 0;
}

* {
  margin: 0;
  padding: 0;
}

img {
  max-width: 100%;
  vertical-align: middle;
}

p > code {
  font-family: "Operator Mono", Consolas, Monaco, Menlo, monospace;
  word-break: break-all;
  overflow-wrap: break-word;
  padding: 2px 4px;
  border-radius: 4px;
  margin-right: 2px;
  margin-left: 2px;
  color: rgb(30, 107, 184);
  background-color: rgba(27, 31, 35, 0.05);
}

.square {
  display: none;
  margin-top: 60px;
  text-align: center;
}
.square img {
  width: 40px;
  height: 40px;
}

.zaikan {
  margin-top: 60px;
  margin-bottom: 20px;
  text-align: right;
  padding-right: 30px;
  background: url(https://img.alicdn.com/imgextra/i4/O1CN01oPJL6R1ujwNiY7wMo_!!6000000006074-2-tps-123-70.png) no-repeat right center;
  background-size: 30px auto;
  font-weight: bold;
}

.zaikan b {
  background: #abe0e1;
}

pre {
  border-radius: 5px;
  box-shadow: rgba(0, 0, 0, 0.55) 0px 2px 10px;
  font-size: .9em;
}

pre > span.pre-header {
  content: ' ';
  display: block;
  background: url(https://img.alicdn.com/imgextra/i3/O1CN01m0Yx2Q1KIAC3HGMPO_!!6000000001140-55-tps-450-130.svg) 10px 10px / 40px no-repeat rgb(40, 44, 52);
  height: 30px;
  width: 100%;
  margin-bottom: -7px;
  border-radius: 5px;
}

pre > code {
  overflow-x: auto;
  padding: 16px;
  color: #abb2bf;
  display: -webkit-box;
  font-family: Operator Mono, Consolas, Monaco, Menlo, monospace;
  padding-top: 15px;
  background: #282c34;
  border-radius: 5px;
}

blockquote {
  border-left: 5px solid rgb(60, 112, 198);
  padding: 0px 15px;
  margin: 0px 0px 20px;
  color: rgb(60, 112, 198);
  font-size: 1em;
  font-weight: bold;
}