I'm sorry, we don't make custom styling adjustments for customers on their sites. Every site is different and templating/styling could be an endless support cycle for us that we simply can't provide.
The code Melissa posted above does look correct, but I don't see it on the page. Your site is compressing and combining the CSS, so it's difficult to find where you should place the updated code. I'd recommend disabling whatever is trying to optimize the CSS files and/or contact your template provider for the best way to add overrides.