.product-list{
    padding-top:50px;
    display: flex;
    flex-wrap: wrap;
}
.product-item{
    position: relative;
    float: left;
    width: 280px;
    height: 280px;
    margin-bottom: 20px;
    margin-left: 20px;
}
.product-item a{
    display: inline-block;
    position: relative;
}
.product-title{
    position: absolute;
    left: 0;
    bottom: 0;
    width: 280px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: #05467f;
    opacity: .75;
    color: white;
}