hatena_mobile_midashi

「デザイン」→「スマホ」→「記事」→「上」
<style type="text/css">
/* 見出し各種 */
.entry-content h3 {
  padding: 4px 10px;
  color: #3D3F44;
  background: #f3f3f3;
  border-left: 8px solid #3f3f3f;
  margin:60px 0 15px 0;
}
.entry-content h4 {
  position: relative;
  color: #3D3F44;
  border-bottom: 4px solid #f3f3f3;
  padding: 3px 10px;
  margin:30px 0 10px 0;
}
  
.entry-content h4::before {
  position: absolute;
  top: 100%;
  left: 0;
  width: 20%;
  height: 4px;
  background:#3f3f3f;
  z-index: 2;
  content: '';
}
.entry-content h5 {
  color:#3D3F44;
  position: relative;
  padding-left: 1.2em;
  line-height: 1.4;
  margin:20px 0 8px 0;
}
.entry-content h5:before{
  font-family: FontAwesome;
  /*アイコンユニコード*/
  content: "\f00c";
  /*アイコン色*/
  color: #3f3f3f; 
  position: absolute;
  font-size: 1em;
  left: 0;
  top: 0;
}
</style>