Add any custom page for internal and global use. Please check the Settings>App settings>Setup>Pages.
By default, the pages are public. You can set following permissions for each pages:
- Internal use only
- Visible to team members only
- Visible to clients only
Here is an example custom page which is using bootstrap built in classes. There are few custom css.
https://rise.fairsketch.com/index.php/about/custom-page-example
To edit the code, please click on the code icon.
A public custom page can be added as a landing page.