diff --git a/docs/_style/style.css b/docs/_style/style.css
index c8578007..06068dcd 100644
--- a/docs/_style/style.css
+++ b/docs/_style/style.css
@@ -43,7 +43,7 @@ body {
 }*/
 
 section.cover h1 {
-    margin ： 0;
+    margin: 0;
 }
 
 body>section>div.cover-main>ul>li>a {