* change alert style in pageContent.

src/less/doc.less

@@ -1556,6 +1556,15 @@ body.query-enabled {
       }
     }
   }
+
+  > article > .alert, > section > article > .alert {
+    border-radius: 0;
+
+    code {
+      background-color: rgba(255,255,255,.2);
+      border-color: rgba(0,0,0,.1);
+    }
+  }
 }
 #pageTogger {
   position: absolute;