.el-menu{
  position: relative;
  margin: 0;
  padding-left: 0;
  background-color: $menu-item-color;
  height: 100%;
  @include clearfix();
}

.el-menu-node{
  padding: 0 20px;
  padding-right: 0;
  color: $color-white;
  cursor: pointer;
  transition: border-color .3s,background-color .3s,color .3s;
  box-sizing: border-box;
  white-space: nowrap;

  & .el-menu-node-content{
    height: 50px;
    line-height: 50px;
    position: relative;

    & .el-menu-node-icon{
      margin-right: 5px;
    }

    & .el-menu-node-opened-icon{
      position: absolute;
      top:50%;
      right: 20px;
      margin-top: -7px;
      transition: transform .3s;
      font-size: 12px;
    }
  }

  & > .el-menu-node-children{
    overflow: hidden;
    background-color: transparent;
    display: none;
    position: relative;
  }

  &.is-opened > .el-menu-node-children{
    display: block;
  }

  &.is-opened > .el-menu-node-content > .el-menu-node-opened-icon{
    transform: rotate(180deg);
  }

}

.el-menu-node-children{

  &::after{
    content: ' ';
    position: absolute;
    height: 100%;
    width: 1px;
    background-color: #fff;
    top: 0%;
    left: 16px;
  }

  &.first::after{
    left: 6px;
  }

}