🏷️ 更新至3.0.0-RC-1 close #189, close #192, close #223, close #224, close #229, close 232, close #240

source/css/_layout/third-party.styl

@@ -49,11 +49,12 @@ if hexo-config('beautify.enable')
             content: none
 
 // third-party
+// fireworks
 .fireworks
   position: fixed
   top: 0
   left: 0
-  z-index: 999999
+  z-index: $fireworks-zIndex
   pointer-events: none
 
 .medium-zoom-image--opened
@@ -83,4 +84,4 @@ if hexo-config('beautify.enable')
     padding: .3rem 0 .8em
 
 .has-jax
-  overflow: auto
+  overflow: auto