I'm trying to figure out how to style the captions on an image

I'm trying to figure out how to style the captions on an image.You can see my un-styled captions here: http://www.aedhealth.com/ I'd like to be able to change font, but I suppose I need to add CSS to do it, but cannot determine correct containers to target

I have another issue, too... a website won't show me menus anymore at http://www.code9000.com