div.content {
    display: block;
}
div.content {
    display: block;
    margin-top: 5em;
    background-image: url(/images/W6.jpg);
    background-size: 670px;
    background-position: 50% 0;
    background-repeat: no-repeat;
    width: 100%;
    height: 749px;
}

@media screen and (max-width: 669px) {
div.content {
    background-size: 100%;
}
}