如何避免将鼠标悬停在菜单项上以影响右侧的菜单项

I have an extremely simple horizontal menu. I wanted to font to become bold on hover. The thing is when I make the hover the text becomes bold but all menu items on the right switch to the right by few pixels. Hope someone can help me understand how to avoid that. thank you.I have an extremely simple horizontal menu. I w