Accordion / Table styles being overidden

Hello all, love the theme it really is great. I am trying to style the accordion and tables on a page, but am coming up against the styles being over- ridden somewhere. A previous developer had helped work on things before, but did not add much in the way of custom code (not that I can see anyway). Basically when I inspect the accordion and table on this page as I scroll down the style is being over-ridden by a CSS rule – border-color: transparent; – When I turn this off I now have borders etc and my accordion icons show up. I can’t find where this has been activated in the code beforehand, it’s not in quick css, custom css or any of the style rules from the enfold backend dashboard (again, not that I can see so far but doesn’t mean it hasn’t!). I am using the latest version of Enfold. Would love some advice on this one, many thanks.