body, h1, h2, h3, h4, h5, h6 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
             "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
             SimSun, sans-serif;
}
.markdown-body h1, .markdown-body h2 {
  padding-bottom: .75em;
  margin-top: 3em;
}

.doc-img {
  width: 50%;
  display: block;
  margin: 24px 0;
}

.list-index {
  padding: 6px;
  background-color: #ff561b;
  color: #fff;
  font:italic bold 18px arial,sans-serif;
  border-radius: 50%;
  display: inline-block;
  width: 2.2em;
  height: 2.2em;
  line-height: 1.6em;
  margin-right: .6em;
  text-align: center;
  vertical-align: middle;
}

/* 覆盖掉 Interface 下的标题样式 */
.markdown-body blockquote.api {
  background-color: transparent;
}
.markdown-body blockquote.api:before {
  content: '';
  display: none;
}

/* markdown 的注释样式 */
.markdown-body blockquote {
  border-left: 4px solid #ff561b;
  background-color: #f8f8f8;
  padding: .12rem .24rem;
  position: relative;
}
.markdown-body blockquote:before {
  content: '!';
  display: block;
  position: absolute;
  left: -.12rem;
  top: .12rem;
  width: 20px;
  height: 20px;
  background-color: #ff561b;
  color: #fff;
  border-radius: 50%;
  text-align: center;
  font-family: 'Dosis', 'Source Sans Pro', 'Helvetica Neue', Arial, sans-serif;
}