.list{
    width: 100%;
    margin-top:20px;
}
.item{
    position: relative;
    float: left;
    width: 150px;
    height: 70px;
    margin-left: 20px;
    margin-top: 20px;
    border-radius: 15px;
    background-color: cyan;
    font-size: 20px;
    text-align: center;
    line-height: 70px;
}