.ui-dropmenu {
    position: absolute;
    display: none;
    -webkit-user-select: none;
    -webkit-box-sizing: border-box;
    z-index: 10;
}

.ui-dropmenu.ui-in {
    display: block;
}

.ui-dropmenu-items, .ui-dropmenu-items>li {
    list-style: none;
    white-space:nowrap;/*内容不换行*/
}