style: Enhanced theme config.

Author: jaywcjlove

src/styles/markdown.less

@@ -98,6 +98,7 @@
 
 [data-color-mode*='dark'] .wmde-markdown,
 [data-color-mode*='dark'] .wmde-markdown-var,
+.wmde-markdown-var[data-color-mode*='dark'],
 .wmde-markdown[data-color-mode*='dark'],
 body[data-color-mode*='dark'] {
   color-scheme: dark;
@@ -147,6 +148,7 @@ body[data-color-mode*='dark'] {
 
 [data-color-mode*='light'] .wmde-markdown,
 [data-color-mode*='light'] .wmde-markdown-var,
+.wmde-markdown-var[data-color-mode*='light'],
 .wmde-markdown[data-color-mode*='light'],
 body[data-color-mode*='light'] {
   color-scheme: light;