diff --git a/theme/classic.html b/theme/classic.html
index 42c6cd8..b2de03d 100644
--- a/theme/classic.html
+++ b/theme/classic.html
@@ -63,6 +63,9 @@
         .readme{padding:8px;background-color:rgba(245,245,245,0.5);}
         .markdown-body, .customfile{padding:20px;text-align:left}
         @media only screen and (max-width:480px){
+<!--BackgroundMStart-->
+            body{background-repeat:no-repeat;background-size:cover;background-attachment:fixed;background-image:url("<!--BackgroundMUrl-->");}
+<!--BackgroundMEnd-->
             .title{margin-bottom:24px}
             .list-wrapper{width:95%; margin-bottom:24px;}
             .list-table {padding:8px}