Multi-column drop down menu in Debut theme

Store Design
123
  1. Go to Online Store->Theme->Edit code
  2. Asset->theme.scss Or theme.css-> paste bellow code in bottom of file
.navbar-nav.navbar-standard > li:nth-child(3) > ul,.navbar-nav.navbar-standard > li:nth-child(4) > ul,.navbar-nav.navbar-standard > li:nth-child(5) > ul{column-count: 3;}