The meaning of “parte de”

I was doing the exercise from “el cronometro B2”, and there is a question that says: “ La empresa parte de la idea de dar y recibir ”. And the Apple translation tells me that the sentence means “ the company is based on the idea of giving and receiving”

So my question is that why the word “parte de” means “based on”, I searched the the word “parte / partir “ in dictionary and can’t find any explanation related to this translation.

Many thanks 🙏