Hi there,
the best i can offer is this CSS:
@media(max-width: 800px) and (min-width: 600px) {
#produkt_categories .bildhover h2 {
display: block;
display: -webkit-box;
max-width: 100%;
height: 1.4em;
margin: 0 auto;
line-height: 1;
-webkit-line-clamp: 1;
-webkit-box-orient: vertical;
overflow: hidden;
text-overflow: ellipsis;
margin-bottom: 1em !important;
}
}
It will clamp the H2 to a single line on those smaller screen sizes.
Any other modification you would need to speak to the Plugin Developer.