I enjoyed the markup. Reminds me of the old days with font tags:

<p class="pageWrap pageWrap--s marginBottom-m paddingBottom-s c-slate lineHeight-l fontSize-l fontWeight-3 breakPointM-fontSize-xl breakPointM-lineHeight-xl">...</p>

and of course

<strong class="c-slate lineHeight-l fontSize-l fontWeight-5 breakPointM-fontSize-xl breakPointM-lineHeight-xl">9–14px</strong>

Seems a bit excessive, perhaps we could use a document to store all these classes in an organized fashion and then just refer to them by some sort of tagging system. We could link to that document from multiple pages, even, and change it without changing the base markup at all.