I don’t know how you wrote it, so I’ll share my thoughts:

Structure p>(a>img)*3

pSet a width as the total width of the three icons (you can use percentages to adjust), and then set both ends to be aligned;
aSet inline-block, and then make an after pseudo-class

p:after { content:""; width:100%; height:0; display:inline-block; overflow:hidden; }

Flatten the three icons and it should be fine.

I guarantee you won’t have this problem if you use flex layout