If you have your own sales page you'd like to use on your own site, you can bypass the CourseCraft landing page and use your own. This setting can be found on the 'landing page' tab of your course under the 'advanced settings' button.
By using your own landing page, participants will be directed straight to the enrollment process for your course. When you switch the toggle to 'yes' you'll see a URL where the landing page content used to be. Direct your participants to this URL from your own site.