Description

In the Vite tests (Linux), playground/html/__tests__/html.spec.ts fails:

• nested > css: expect(await getColor('p')).toBe('grey') — received 'black'
• nested w/ query > css: same failure

This suggests rolldown is not correctly handling CSS in nested HTML pages — the <p> element's color style is not being applied.

Environment

• Linux only (passes on Windows)
• Test is in the cloned Vite repo (rolldown-canary branch), not directly in this repo

CI Logs

https://github.com/rolldown/rolldown/actions/runs/23378843001