Need to eliminate banner negative space on mobile

urgent help to remove negative space from banner

2 hours ago, Shreya123 said:

urgent help to remove negative space from banner

What is the site url

22 hours ago, Shreya123 said:

urgent help to remove negative space from banne

Hi. Add this code to Design > Custom CSS

/* Mobile-Homepage-Reduce space under banner */
@media screen and (max-width:767px) {
.gallery-fullscreen-slideshow {
    height: 35vh !important;
}
}