Replace pages with static HTML pages
lets say your url is : example.com/services , and services is 1 content type of drupal , and if you want to replace whole page with static html them create services.html page on root folder of your drupal and add whole html inside it and then run url it will display only html added in that html file.

Note : this html file name must be same as url , if url is example.com/abc then file name should be abc.html

Hope this helps you.