Hi,
You can build custom templates: import and export, however E2Pdf has no feature to use global stylesheets to control output design as it’s Drag&Drop builder. E2Pdf supports building templates as from scratch, as using pre-made PDFs to be uploaded. Currently E2Pdf supports HTML via “HTML” blocks however it has limitations as not all HTML/CSS tags supported. Also you must keep in mind that all elements will have “static” positions and will not change it’s position/size depending on other elements/content unless “Actions” and “Conditions” or “HTML” block used. We are continuously working on extending its support.
The best way to understand if it will fit your needs is to test it directly. Our “FREE” version has only limitation to 1 activated template with 1 page inside, all other features available out of the box. You can check our YouTube channel to see some examples: https://www.youtube.com/e2pdf
We remain at your service.