Quarto RevealJS: **text**{style="..."} inline attribute syntax renders as literal text instead of applying styles to bold content. The curly-brace attributes are not parsed by Pandoc when directly appended to strong emphasis markdown.
Use Pandoc's explicit span syntax with square brackets: [**text**]{style="color: #f1f0eb; font-size: 1.4em;"}. This wraps the bold text in a <span> with the correct inline styles applied. The key insight is that Pandoc attributes attach to spans (bracket-delimited), not to arbitrary inline formatting nodes.