li.cat-item-child {
    padding-left:20px
}
li.cat-item-child a {
    background: unset;
    white-space: nowrap;
    text-overflow: ellipsis;
    word-break: break-word;
    overflow: hidden;
}
ul.cat-item-hide {
    display: none;
}
ul.cat-item-show {
    display: block;
}