Front-End Editor or Friendly User Interface to update content for "customers"

Hi,
I’m running an intranet, and our Product Managers should be able to update their own products sections only.
They are not familiar with html or the classical WP Editor (anyway not displaying the page when Avia advanced tool is used)

Is there a way to have a front-end editor with Enfold, enabling possibilities for people to Edit the page content, without accessing to the whole Avia advanced tool. I need to make it simple and safe.

In other words, page are build with many Avia Enfold widgets and advanced functiunalities, pictures etc., and I don’t want people to be able to modifie the page structure in itself. Only texts, item box of files to download, pictures, etc. Not the lay-out or anything else.

The trouble is -a great quality of Enfold!-, that the Avia framework is so easy to use thanks to drag and drop tool, that I don’t want people to play with it, test anything…and finally break the site/pages or guidelines before calling me to repare.

Any way to lock the page display but make the content editable through a user-friendly interface?

Thank you.
Best regards.