#a-site_contents ul {
  position: relative;
}
#a-site_contents ul li {
  line-height: 1.5;
  padding: 0.5em 0;
  list-style-type: none!important;
  padding-left: 2em !important;
}

#a-site_contents ul li:before {/*疑似要素*/
  font-family: "Font Awesome 5 Free";
  font-weight: 900;
  content: "\f00c";/*アイコンの種類*/
  position: absolute;
  left : 0.5em;/*左端からのアイコンまでの距離*/
  color: #0179af;/*アイコン色*/
}

#a-side-a ul {
  position: relative;
}
#a-side-a ul li {
  line-height: 1.5;
  padding: 0.5em 0;
  list-style-type: none!important;
  padding-left: 1em !important;
}

#a-side-a ul li:before {/*疑似要素*/
  font-family: "Font Awesome 5 Free";
  font-weight: 900;
  content: "\f0da";/*アイコンの種類*/
  position: absolute;
  left : 0.1em;/*左端からのアイコンまでの距離*/
  color: #000;/*アイコン色*/
}
#a-site_contents ol{
  counter-reset:number; /*数字をリセット*/
}
#a-site_contents ol li{
  position: relative;
  padding-left: 30px;
  line-height: 1.5em;
  padding: 0.5em 0.5em 0.5em 30px;
}

#a-site_contents ol li:before{
  /* 以下数字をつける */
  position: absolute;
  counter-increment: number;
  content: counter(number);
  /*以下数字のデザイン変える*/
  display:inline-block;
  background: #00a0e8;
  color: white;
  font-family: 'Avenir','Arial Black','Arial',sans-serif;
  font-weight:bold;
  font-size: 15px;
  border-radius: 50%;
  left: 0;
  width: 25px;
  height: 25px;
  line-height: 25px;
  text-align:center;
}