#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*/
}