diff --git a/public/stylesheets/application.css b/public/stylesheets/application.css
index 35e41453e..edde12527 100644
--- a/public/stylesheets/application.css
+++ b/public/stylesheets/application.css
@@ -1598,7 +1598,8 @@ blockquote {
 	margin-right: 0.4em;
 	border-radius: 4px;
 	font-family: "Microsoft YaHei";
-	background: url('../images/requirements/reference.jpg')
+	background: url('../images/requirements/reference.jpg');
+    background-size: 100% 100%;
 }
 
 blockquote blockquote { margin-left: 0;}
@@ -2780,4 +2781,4 @@ div.repos_explain{
 	padding-top: 20px;
 	padding-bottom: 20px;
 }
-.upload_img img{max-width: 580px;width: 100%;}
+.upload_img img{max-width: 100%;}
diff --git a/public/stylesheets/courses.css b/public/stylesheets/courses.css
index 132cddadc..5333b91a7 100644
--- a/public/stylesheets/courses.css
+++ b/public/stylesheets/courses.css
@@ -487,6 +487,7 @@ blockquote {
     border-radius: 4px;
     font-family: "Microsoft YaHei";
     background: url('../images/requirements/reference.jpg');
+    background-size: 100% 100%;
 }
 a.member_search_edit {width: 43px;background: #15bccf;color: #fff;text-align: center;text-decoration: none;padding: 2px;}
 .min_search_edit {width: 150px;height: 20px;border: 1px solid #d0d0d0 !important;color: #666;}
diff --git a/public/stylesheets/project.css b/public/stylesheets/project.css
index 74d7c58b3..d6bef6524 100644
--- a/public/stylesheets/project.css
+++ b/public/stylesheets/project.css
@@ -388,6 +388,7 @@ blockquote {
     border-radius: 4px;
     font-family: "Microsoft YaHei";
     background: url(http://test.forge.trustie.net/images/requirements/xreference.jpg.pagespeed.ic.h4inUJNyH0.jpg);
+    background-size: 100% 100%;
 }
 /*上传项目图片*/
 .upload_file{margin-left: -60px;margin-top: 40px;width: 50px;position: absolute;height: 24px;opacity: 0;cursor: pointer}