diff --git a/admin/css/style.css b/admin/css/style.css
index 31e3d626..13cc9fdc 100644
--- a/admin/css/style.css
+++ b/admin/css/style.css
@@ -1180,9 +1180,6 @@ a.operate-reply {
   padding: 5px 20px;
   border: 1px solid #F3F3F0;
   border-width: 1px 0 0 1px;
-  height: -moz-calc(100% - 52px);
-  height: -webkit-calc(100% - 52px);
-  height: calc(100% - 52px);
   background: #F6F6F3;
   overflow: auto; }
   .fullscreen #wmd-preview code, .fullscreen #wmd-preview pre {
diff --git a/admin/scss/components/_editor.scss b/admin/scss/components/_editor.scss
index 5295ea99..76df9a2e 100644
--- a/admin/scss/components/_editor.scss
+++ b/admin/scss/components/_editor.scss
@@ -123,7 +123,7 @@
     border: 1px solid #F3F3F0;
     border-width: 1px 0 0 1px;
     // height: 100%;
-    @include calc(height, "100% - 52px");
+    // @include calc(height, "100% - 52px");
     background: #F6F6F3;
     overflow: auto;
     code, pre {