Extreme,
In addition to Xavier, and after seeing (and Firebugging) your site, I may be allowed to state honestly that it is a bit of... errrmm, "typographic chaos" there.
E.g. entire text blocks such as category descriptions are in H1 (which is usually the tallest and boldest type), then brought with all might and "!important" down to regular copy size... and font-weight. I'm very certain that neither HikaShop, nor even your template is to blame (as opposed to Xavier's quick guess). If it was yourself, or an "expert web designer", I don't mind - it's just far from "normal and good".
So, we shouldn't be too surprised that a page, if not more, slips that heavy "corrective" use of CSS muscles.
Other than that, not a bad site! I'd strongly recommend a complete makeover, it's worth it. But that's maybe not what you want to do on this nice Wednesday.
So then, I'd love to give you those 1 or 2 lines of "survival CSS", but as far as I can go towards Verder Winkelen, I can't see anything more evil-ish bold than all over the rest of the site.
Got a demo user login, so I can sail on to checkout with my Handschoen houder in my Winkelwagen? PM me.