.boss-layui-nav-child {
    display: none;
    position: absolute;
    left: 0;
    top: 65px;
    min-width: 100%;
    line-height: 36px;
    padding: 5px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, .12);
    border: 1px solid #d2d2d2;
    background-color: #fff;
    z-index: 100;
    border-radius: 2px;
    white-space: nowrap;
}

.boss-layui-nav-child dd {
    position: relative;
}

.boss-layui-nav-child a {
    display: block;
    padding: 0 20px;
    color: #000000;
    transition: all .3s;
    font-size: 14px;
}