Custom layouts for responsive site page We're converting a site to be responsive and have decided to use Adaptive Theme. But the client insists on a unique layout for the Front page that does not fit into Adaptive's method of stacking sidebars. In principle I need a layout program like Panels or Display Suite that lets you create two layouts, and then decides which one to use depending on the device. I'm a coder and can do this myself with a page callback, or I suppose in the front page template, but was hoping for another solution. Is there a better way?
I think the theme key module might be just what you need. From the module's page:


  ThemeKey allows you to define simple or sophisticated theme-switching
  rules which allow automatic selection of a theme depending on current
  path, taxonomy terms, language, node-type, and many, many other
  properties. It can also be easily extended to support additional
  properties exposed by other modules. In combination with Drupal's
  theme inheritance you can easily achieve features like:



individually-styled channels
a front-page / "splash" screen a
date/time-selected Christmas 
theme mobile themes for different auto-detected mobile devices 
special themes for "limited" or "old" browsers
content, user, or role -specific themes indicating your
environment (production, staging, testing, sandbox, … ) testing your
redesign safely on a live server


And many more. https://www.drupal.org/project/themekey