generated at
2/16/2025, 2:06:31 AM
CSS @規則
https://developer.mozilla.org/ja/docs/Web/CSS/At-rule
@media
CSS Conditional Rules
https://www.stefanjudis.com/blog/conditional-border-radius-and-three-future-css-features/
@when (CSS)
@else (CSS)
FireFoxでしか使えない
@scroll-timeline (CSS)