The effect of transitions on the main page?

Question

css

Help out guys!
Can't find page transition effect. I will try to describe in words and draw.
In principle, the page should consist, as it were, of several pages that in themselves resemble an unfolded box.
The main one is the bottom of the box. Transitions are carried out to the left, to the right, up, down. But for example, if we are on the left side and want to go to the top, then by clicking on the menu item, we smoothly go to the main, and then to the top of the page.
At least the website is an example.

Answer 1

wlada.github.io/vue-carousel-3d/

Answer 2

alvarotrigo.com/fullPage