Interactive document without Flash

Hello everyone. I need to create an interactive user guide for a new company (how to access it, where to park, where to eat, how to set up your desk chair, how to use the printer, and so on). The guide will include text, pictures, maps, sounds and videos, forms, etc.. It will be used on PCs, mobile devices (Android, Apple),… It should be usable even with no Internet connection. Flash is not an option. I have been trying to find the ideal format for a while but it is not that easy. Interactive PDF would have been a nice option as it supports multimedia but you need to have the Flash Player installed to make it work, and that is impossible in my case. Would you have any recommendations? Thank you.