CSS：last-of-type不与以下组合使用：not

I've got something that behaves the same way as the provided snippet. I've got a list of items, that when one is selected, I want that one to be displayed at the top of the list, which I can easily do with flex ordering. Only one can be selected at a time. But since each of the list elements have borders, the last element shouldn't have a border. Simply using the I've got something that behaves the same way as