diff --git a/css/common.css b/css/common.css
index 3c51e87..8864bf4 100644
--- a/css/common.css
+++ b/css/common.css
@@ -1,5 +1,13 @@
 @import "../lib/fonts/iconfont.css";
-
+html{
+    webkit-filter: grayscale(100%);
+    -moz-filter: grayscale(100%);
+    -ms-filter: grayscale(100%);
+    -o-filter: grayscale(100%);
+    filter: grayscale(100%);
+    filter: progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);
+    filter: gray;
+}
 [v-cloak]{display:none!important}
 .ok-body{padding:10px}