Hi Gregory,
Thanks for contacting us, there are at least two independent methods to achieve this:
- You can create a template duplicate/clone - where you will detele footer, header etc. and assign that template style to submenu where you have Landing page
 
- Or inside that Page you can use Custom CSS that will hide those areas:
 
#sp-header, #sp-menu, #sp-logo, #sp-footer, #sp-bottom 
{display: none !important; visibility: hidden;} 
Those are methods that webmasters use for ages, since first Joomla versions regardless of the component used. I hope I helped, if yes, mark topic as solved. And have a nice day.
-Regards.