出于某种原因，我的悬停字幕有额外的宽度和高度？

I've set up some hover captions on my images, and they used to work perfectly. I shifted things around a bit to make room for a sidebar (it's a wordpress site), and since then I can't figure out why I have an extra 40px on the captions! I've tried changing the max width and fixed width values of the images on both WP and in my CSS. i've also tried changing the positioning and the padding and still nope. Relevant CSS below:I've set up some hover captions on my images, a