.menu {
    margin: 10px auto;
    height: 50px;
    width:320px;

}
.menu  span {
    display: block;
    float: left;
    margin-left: 20px;
    border-radius: 5px;
    background-color: #DADADA;
    color: white;
    height: 40px;
    line-height: 40px;
    width: 80px;
    text-align: center;
    cursor: pointer;
    margin-top: 10px;


}
.menu span:hover {
    background-color: #4ACBD1;
}
.choose {
   background-color: #4ACBD1!important; 
}