At first glance, the colorful layout (and the introductory tone of the first page) made me think this was a brochure page for a company specializing in CRO. It

At first glance, the colorful layout (and the introductory tone of the first page) made me think this was a brochure page for a company specializing in CRO. It's not - it's a comprehensive and detailed 12-chapter summary of best practices and techniques. Stick with it, it's worth a read. To the implementors: you may want to make it more obvious it's a full course, with the chapter list (or at least next/previous) at the top or in a sidebar. (I of course missed the "Chapter 1" badge and chapter list link when scrolling through.) Great work!