: A "Related Posts" plugin (like Inline Related Posts ) is failing to load its stylesheet properly, causing the raw code to leak into the readable text [2].

If this text is appearing literally on a webpage you are visiting, it usually indicates a on that site:

: It uses a dark navy/slate background ( #34495E ) with a bright blue left accent border ( #3498DB ) [1].

The code describes a prominent, full-width block designed to grab a reader's attention:

The random-looking string (e.g., ue7e1... ) is a hash created to prevent CSS styling conflicts with other parts of a website. CSS Breakdown

The CSS snippet you provided is a often used by WordPress plugins to style "inline related posts" or "call-to-action" boxes [1, 2].

Stack Overflow - CSS Hash Classes (General context on generated CSS) WordPress.org Forums - Inline Related Posts Support