The text is still big and bold, as you can see here:  https://www.omniacrystallis.com/forum/kh-generale/kh-iii/. Currently, I am using the following code (I have even tried to add "font-size: 11px !important;", but nothing occurred). The first #wpforo #wpforo-wrap was already there when I installed wpForo, so I didn't remove it.

#wpforo #wpforo-wrap {
font-size: 13px; width: 100%; padding:10px 20px; margin:0px;
}

#wpforo #wpforo-wrap blockquote:before {
   display: none !important;
}

#wpforo #wpforo-wrap .wpforo-post-content .result-container .container__top__hours-wasted font > font {
    font-weight: normal !important; font-size: 11px !important; 
}

#wpforo #wpforo-wrap .wpforo-post .wpf-right blockquote{
    text-align: left !important; font-size: 11px !important;
}

Hi @zell,

This CSS should solve the issue, plase add those in Custom CSS Code textarea, and check agan. 

#wpforo #wpforo-wrap .wpforo-post .wpf-right .wpforo-post-content blockquote > p {
   font-weight: normal !important;
}
#wpforo #wpforo-wrap .wpforo-post .wpf-right .wpforo-post-content blockquote > .wpforo-post-quote-author {
   font-weight: normal !important;
}

Thank you @sofy

Quotations still use a character that is different from the forum's one, and also bigger (instead, I'd like it to be slightly smaller than the text used in posts).

Also, weirdly enough, quotations look different from Firefox to Chrome - even though I have cleared wpForo and WP Rocket caches, and cleared browser history and temp files...

Update: I managed to reduce the font size for quotations. What's strange is that I keep seeing the old style ONLY when I am logged in (even though I have cleared every possible cache).