.select_tree {
    position: absolute;
    z-index: 10;
    background: #fff;
    border: 1px solid #e6e6e6;
    border-top: none;
    padding: 0;
    padding-bottom: 25px;
    overflow: hidden;
    display: none;
}

.tree_content {
    max-height: 175px;
    min-width: 100%;
    overflow: auto;
}

    .tree_content .ztree {
        margin-left: 10px;
        margin-top: 10px;
    }

.tree_close {
    position: absolute;
    right: 0;
    bottom: 0;
    border: 1px solid #e6e6e6;
    border-right: none;
    border-bottom: none;
    padding: 2px 5px;
    cursor: pointer;
}