The solution is to be found in a combination of manual work and use of software.
First the designers, editors and photographers jointly draft layouts in differing sizes.
The software subsequently dynamically compensates for minor deviations in screen-size and aspect ratio.
Even problems stemming from different screen resolutions will be solved by the software.
Getting it out to the Reader
One software component turns the extended document into HTML-pages.
After publication on a web-server, another piece of the software always delivers the exact page that fits the user-device.
Hosting a Publication
The choice of provider/hoster is the decisive one here. Even free hosting is possible.