Two column on mobile

Add to Design > Custom CSS

@media screen and (max-width:767px) {
div#page-section-62db00d6d3cb550c613c2d6a .span-2:nth-child(3), div#page-section-62db00d6d3cb550c613c2d6a .span-3:nth-child(4) {
    width: 50% !important;
    float: left !important;
}
div#page-section-62db00d6d3cb550c613c2d6a .span-3:last-child {
    clear: both;
}
}