diff --git a/src/less/app.less b/src/less/app.less
index dfce7113..ccff47d7 100755
--- a/src/less/app.less
+++ b/src/less/app.less
@@ -45,6 +45,7 @@ div, a, li {
   padding-top: 48px;
   overflow-y: scroll;
   -webkit-overflow-scrolling: touch;
+  box-sizing: border-box;
 }
 
 .page {
diff --git a/src/less/header.less b/src/less/header.less
index ceab8a36..07a24a5c 100755
--- a/src/less/header.less
+++ b/src/less/header.less
@@ -25,6 +25,7 @@ header {
   left: 0px;
   width: 100%;
   z-index: 2;
+  box-sizing: border-box;
   .user-select-none();
 
   .menu {