Sample
@charset "EUC-JP";
@charset "UTF-8";
@charset "Shift_JIS";
@charset "ISO-2022-JP";
Reference
CSS Dencitiehttp://www6.plala.or.jp/go_west/nextcss/
CSS Dencitie - CSS2リファレンス - @規則
http://www6.plala.or.jp/go_west/nextcss/ref/slctr/at_rule.htm
@charset "EUC-JP";
@charset "UTF-8";
@charset "Shift_JIS";
@charset "ISO-2022-JP";