Need some help to change bold font to normal font in Queue mode

In the card mode (queue), how to change the bold font (in the screenshot) to normal font?
Thanks.
Question background: I made something like “exam question bank” in RemNote. As you know, in card mode, there are text showed in bold font (here in the screenshot PRACTICE PROBLEMS) . Usually, it is OK.
But sometimes text in bold font would be a very long case. I mean that a long case in bold font is not comfortable to read. So anyone help to write a CSS to change the bold font in card mode to normal font?

I think it is header
You can change to header 0 by the bottom toolbox
image

I am afraid that is not to the point.
The bold font only appears in the card mode, not in the outline mode.
Some CSSs is needed, I think.

Does anyone give me a hand?
CSS may be help, but I have no knowledge of it at present.

@hannesfrank
Guru, could you be kind enough to write a CSS to TURN OFF the bold font I mentioned?
Thanks.