diff --git a/index.html b/index.html
index d2f1b8c..d69cc9f 100644
--- a/index.html
+++ b/index.html
@@ -27,12 +27,14 @@
 	<body>
 		<div class="wrapper">
 			<div class="header">
-				<div class="mod-head">
-					<a href="/">返回首页 &gt;&gt;</a>
+				<div class="inner">				
+					<div class="mod-head">
+						<a href="/">返回首页 &gt;&gt;</a>
+					</div>
 				</div>
 			</div>
 			<div class="container">
-				<div class="content">
+				<div class="inner">
 					<div class="mod-panel">
 						<div class="hd">
 							<h1>中国亲戚关系计算器</h1>
diff --git a/style/index.css b/style/index.css
index 014c450..e58fc92 100644
--- a/style/index.css
+++ b/style/index.css
@@ -6,7 +6,6 @@ body{
     height: 100%;
     font-size: 14px;
     font-family: Arial,Helvetica,"Microsoft Yahei";
-    background: #fdfdfd;
     color:#757575;
 }
 button, input {
@@ -24,13 +23,14 @@ a:hover{
 }
 
 .wrapper{
-    max-width: 740px;
-    margin: 0 auto;
-    _width: 740px;
+    background: #fdfdfd;
 }
 .container{
-    padding: 0 15px;
-    margin-bottom: 30px;
+    padding: 0 15px 30px;
+}
+.inner{
+    max-width: 720px;
+    margin: 0 auto;
 }
 
 .mod-head{
