add cssPropertyMix

packages/artplayer/src/template.js

@@ -135,6 +135,14 @@ export default class Template {
         if (isMobile) {
             addClass(this.$player, 'art-mobile');
         }
+
+        if (option.theme) {
+            option.cssVar['--art-theme'] = option.theme;
+        }
+
+        for (const key in option.cssVar) {
+            this.$player.style.setProperty(key, option.cssVar[key]);
+        }
     }
 
     mobile() {