CSS for spacing the first child

[Takeshi]

Hello.
I was wondering if anyone can tell me which CSS I should touch to adjust the attached arrow part when adjusting line spacing with CSS.

Specifically, I’d like to leave a small gap between the parent title and the first child title that is expanded.

[BigChungus]

.Node-self.is-parent + .Node-children { padding-top: 30px; }

[Takeshi]

Thanks your advice!!

But, it can control these blue spaces, and the red space is still fixed…

[BigChungus]

delete your other CSS temporarily and see if it works alone?

[Takeshi]

Yes, I did.
But nothing changed.

[Takeshi]

Hi, I’ve done it!

.Node-self.is-parent { padding-bottom: 20px; }

Thanks a lot!