On http://restministries.com/forums/ I have WPSymposium

On http://restministries.com/forums/ I have WPSymposium forums. When there are a few posts in a specific forum these are listed with links. But the blue link is very light on these.

These links to have a weight of 700 rather than 500. I think the CSS spot is .wps_forum_categories_item {
font-weight: 500;
}

...but this changes the font weight of description of the forums too. I have tried for an hour and still can't figure it out.

I am not great at CSS but learning a lot, but these small areas lose me.

Thanks for any help. (screenshot attached)