下拉菜单推送父菜单项

I have five parent menu items, and the third one has a child dropdown menu. When you click on the third parent menu, the dropdown menu shows up, but it pushes the fourth and fifth parents menu items to below.I'd like the dropdown menu to be below the parent menu row, without pushing any parent menu items. It's a Shopify site.I have five parent menu items, and the third on