Custom page in Lightspeed?

Hello there!
I'm kinda new here, but want to improve our webshop a bunch, so dare to ask! :)
I would like to know whether it is possible to load a 'custom' page. I know that it's possible to load text and images through content - pages, but this builder is quite limited, does not take any javascript. It also seems impossible to include something like {% include 'snippets/filename.rain' %}.
We would like to build a landingpage within lightspeed on a category, something like this: https://kartent.com/tussenschot/. Creating a simple design that would consist of a few snippets would already be enough, something like the homepage would actually be perfect.
Is something like this even possible to achieve with Lightspeed?