Reply To: Mobile Headers For Categories

You can use the following code:

@media (min-width: 301px) and (max-width: 600px) {
.main-page-wrapper .page-title {
background-image: url(https://adamjohnlea.com/wp-content/uploads/2018/05/maternity_gown.jpg); !important;
background-color: blue;
}
}

Regards