It’s dangerous to make assumptions about how users are interacting with and viewing your website. For instance, desktop users who zoom in on websites will wind up activating the mobile view. And some mobile users navigate with a keyboard.
Rather than “Read More” links, be specific: “Read more about ---.” This is important for users with screen readers who are unable to see the association between the “read more” link and the content it references. You can visually hide “---” so that only screen readers will detect it.
Blocks of text should be no more than 80 characters or glyphs wide (40 if CJK). 45-75 characters is considered ideal.