diff --git a/src/css/layui.css b/src/css/layui.css
index b803d73e..aca2123e 100644
--- a/src/css/layui.css
+++ b/src/css/layui.css
@@ -11,8 +11,8 @@ a:active,a:hover{outline:0}
 img{display: inline-block; border: none; vertical-align: middle;}
 li{list-style:none;}
 table{border-collapse: collapse; border-spacing: 0;}
-h1,h2,h3{font-weight: 700;}
-h4,h5,h6{font-weight: 500; font-size: 100%;}
+h1,h2,h3,h4{font-weight: 700;}
+h5,h6{font-weight: 500; font-size: 100%;}
 button,input,select,textarea{font-size: 100%; }
 input,button,textarea,select,optgroup,option{font-family: inherit; font-size: inherit; font-style: inherit; font-weight: inherit; outline: 0;}
 pre{white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;}