.layui-dropMenu {
    position: fixed;
    width: 130px;
    opacity: 0;
    overflow: hidden; /*果内容溢出一个元素的框，会发生什么。*/
    list-style: none;
    margin: 0;
    padding: 0;
    box-shadow: 0 1px 8px #000; /*阴影*/
    /*过度功能 无论是透明还是大小*/
    transition: opacity .4s linear;
    background: #fff;
    border-radius: 7px;
    text-align: center;
}

.layui-dropMenu a {
    padding: 6px 10px;
}

.layui-dropMenu li {
    padding-left: 10px;
    padding-right: 10px;
    line-height: 28px;
}

.layui-dropMenu li:hover {
    background: #ddd;
    cursor: pointer;
}

.layui-dropMenu .hr {
    height: 1px;
    margin: 5px 0;
    overflow: hidden;
    background-color: #e5e5e5;
}