src/components/CommonPreview.vue

@@ -1239,7 +1239,7 @@ $total-width: $courseware-width + $courseware-left-margin + $courseware-right-ma
   }
 }
 
-:deep .audio-wrapper .audio-middle {
+:deep .scroll-container .audio-wrapper .audio-middle {
   width: 210px !important;
   padding: 6px 8px !important;
   border: none;