column-spanThe column-span CSS property controls whether a child element extends across all columns of a multi-column parent.multi-columnMulti-columnwidely2020-07-282023-01-28https://drafts.csswg.org/css-multicol-1/#spanning-columnshttps://developer.mozilla.org/docs/Web/CSS/Reference/Properties/column-spancss.properties.column-spancss.properties.column-span.allcss.properties.column-span.nonehttps://nowyoucanuse.com/features--column-span.html