True landing pages are greatly needed. This should not be a difficult update to the already awesome Zoho Sites application. There is currently only a global function to hide logo and menu. All that is needed is to make this a page function also. It can be placed in the edit content section for each page. 

This will greatly increase the value of Zoho Sites and is standard practice when marketing products and services with websites. This should not require custom CSS to accomplish. 

Cheers!