web site design and deployment

I need to design a fairly simple web site that will provide info about the training that my company offers. Several reqirements: * multi-browser support (IE, Chrome, Firefox, Safari, etc.) * mobile-friendly version (Android and IPhone) * Updates once deployed (news feeds, twitter and facebook feeds). Updates are to be performed by not too technically savvy users so they should be straight-forward and easy to do * site will have one page where visitor will leave his info and click Submit button, that should generate a notification to the specified list of email recipients (should be able to change the list) * Consistent look across all pages (web and mobile)