.div-boxes{
    margin-bottom: 5em;
    background-image: url('../../../img/box-row.png');
    width: 100%;
    height: 200px;
    background-position: center;
    background-size: cover;
}

@media (min-width: 992px)  { 
    .div-boxes{
        background-image: url('../../../img/box-row.png');
        width: 100%;
        height: 171px;
        background-repeat: repeat-x;
        background-position: center;
        background-size: contain;
    }
}