changing .iconbox_content

Hi there!

I’m trying to change .iconbox_content to have a min height of two boxes next to each other (the “same height” config on the first column didn’t do the job), i.e.

.iconbox_content {
min-height: 280px;
}

Tried adding it in Quick CSS as well as in the Child Theme’s style.css. Doesn’t get pushed through though.

Not sure what I’m doing wrong here… Any help appreciated.

Many thanks in advance!