h3.prapo {
  padding: 0.5em;/*文字周りの余白*/
  color: #494949;/*文字色*/
  background: #fffaf4;/*背景色*/
  border-left: solid 5px #ffaf58;/*左線（実線 太さ 色）*/
}

h4.prapo_4 {
  border-bottom: solid 3px skyblue;
  position: relative;
  font-size: 120%;
  margin: 3px;
}

h4.prapo_4:after {
  position: absolute;
  content: " ";
  display: block;
  border-bottom: solid 3px #ffc778;
  bottom: -3px;
  width: 30%;
}

h5.prapo_5 {
  padding: 0.25em 0.5em;/*上下 左右の余白*/
  color: #494949;/*文字色*/
  background: transparent;/*背景透明に*/
  border-left: solid 5px #7db4e6;/*左線*/
  margin:3px;
  font-size: 110%;
}