<div class="row row-1">
<img src="img/Welcom1.png">
</div>
<div class="row row-11">
<img src="img/Welcome11.png">
</div>
.row-1 {
margin-top: 1rem;
}
@media (max-width: 768px) {
.row-1 {
display: none;
}
}
@media (min-width: 769px) {
.row-11 {
display: none;
}
}