List Gallery on Desktop Needs To Be Stacked on Mobile

On the Arkansas Hunts page there is a List Gallery that looks good on desktop, but does not look good on mobile (I've attached photos with examples) 

Does anyone know of custom css code that would allow the image to be the full width above the photo title and description on mobile view?

It should stack, and does on a small enough screen, this Custom CSS should increase the stacking point to 768px instead of 640px:

@media screen and (max-width: 768px)
.sqs-block-summary-v2 .summary-block-setting-design-list .summary-thumbnail-outer-container, .summary-content {
    width: 100% !important;
}