/*ツリー構成図リストスタイル*/
.is-style-tree {
 list-style-type: none;
 display:block;
 position:relative;
 background-color:#f7f7f7;
 padding:30px;
 font-size:12px;
}

.is-style-tree li {
 line-height: 21px;
 margin: 0 !important;
}

.is-style-tree ul {
 display:block;
 position:relative;
 padding:0;
 padding-left:21px;
 padding-inline-start: 21px;
 margin: 0;
 margin-bottom: 10px !important;
}

.is-style-tree ul:before {
 content:"";
 position:absolute;
 top:-2px;
 bottom:0;
 left:-20px;
 width:0;
 border-left: 1px solid gray;
 margin-left:24px;
}
 
.is-style-tree ul li {
 display:block;
 position: relative;
}

.is-style-tree ul li:before {
 content: "";
 position: absolute;
 top: 10px;
 bottom: 0;
 left: -17px;
 width: 14px;
 height: 0;
 border-top: 1px solid gray;
}

.is-style-tree ul li:last-child:before {
 height: auto;
 background-color: #f7f7f7;
}