.tree{
    // min-width: 199px;
    border-right: 1px solid #efefef;
    height: calc(100vh - 200px);
    margin-right: 5px;
    overflow-x:auto;
    overflow-y: auto;
    >div{
        // width: 350px;
    }
    img{
        width: 15px;
        margin-right: 5px;
    }
}