diff --git a/public/stylesheets/courses.css b/public/stylesheets/courses.css
index c0458e503..c60fca5cc 100644
--- a/public/stylesheets/courses.css
+++ b/public/stylesheets/courses.css
@@ -55,7 +55,7 @@ a:hover.problem_pic{border:1px solid #64bdd9;}
 .problem_txt{ width:610px; margin-left:10px; color:#777777;word-break: break-all;word-wrap: break-word;}
 a.problem_name{ color:#ff5722;}
 a:hover.problem_name{ color:#d33503;}
-a.problem_tit{ color:#0781b4; width:430px; display:block; overflow:hidden; white-space: nowrap; text-overflow:ellipsis;}
+a.problem_tit{ color:#0781b4; max-width:430px; display:block; overflow:hidden; white-space: nowrap; text-overflow:ellipsis;}
 a:hover.problem_tit{ color:#09658c; }
 .problem_main{ border-bottom:1px dashed #d4d4d4; padding-bottom:10px; margin-bottom:10px;}
 /****翻页***/