.Googleマップ {
.map{
width:100%;
padding-bottom: 42.85%;
height:0px;
position: relative;
}
.map iframe{
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
}

$@media screen and (min-width: 768px) {

$@media screen and (max-width: 767px) {

}