How to divide surface and let the division line perpendicular

Hi all,
I’m trying to model this surface and have a problem with dividing it.

I tried divide surface and divide domain^2 in grasshopper but cannot get what I want.
This is the division result.
diviede in GH
But what I need is this.
perpendicular division
Is there anyone who knows how to make it?
I would be very appreciative if I could get help here.
Thanks a lot!!!

This depends a bit on your curve lengths… (5.4 KB)

Thanks. Yes, I found that as well. It’s just so difficult to make the same model as the image. lol
I’m trying to introduce lunchbox to help the design now.