.select{
    height: 5rem;
    overflow: hidden;
    position: fixed;
    width: 100%;
    bottom: 0px;
    left: 0px;
    z-index: 999999999
}
.selectBtn{
    display: flex;
    padding: 0.2rem .5rem;
    border-bottom: 1px solid #ccc;
}
.selectActive{
    background: rgba(0,0,0,0.2);
    width: 100%;
    position: absolute;
    left: 0%;
    color: #fff;
    height: .8rem;
    top: 2.5rem;
}
.selectBtn>button{
    width:1rem;
    height:.5rem;
    border:0px;
    background:#ccc;
}
.selectBtn>p{
    text-align: center;
}
.selectBtn>button.firstBtn{
    background:blue;
    color:#fff;
}
.selectBtn>p{
    flex:1;
}
.select>nav{
    display: flex;
    overflow: hidden;
}
.select>nav>ul{
    padding: 0px;
    margin:0px;
    flex:1
}
.select>nav>ul>li{
    height: .8rem;
    line-height: .8rem;
    list-style: none;
    text-align: center
}