diff --git a/admin/css/style.css b/admin/css/style.css
index 4d58e216..f49dd203 100644
--- a/admin/css/style.css
+++ b/admin/css/style.css
@@ -34,6 +34,9 @@ code, pre, .mono {
 .p {
   margin: 1em 0; }
 
+.body-100 {
+  height: 100%; }
+
 a.balloon-button {
   display: inline-block;
   padding: 0 6px;
@@ -619,11 +622,12 @@ button {
 
 .typecho-login {
   display: table-cell;
+  padding-bottom: 100px;
   width: 280px;
   text-align: center;
   vertical-align: middle; }
   .typecho-login h1 {
-    margin-bottom: 1em; }
+    margin: 0 0 1em; }
 
 .typecho-login .more-link {
   margin-top: 2em;
diff --git a/admin/login.php b/admin/login.php
index 7bf18080..ce7b2d96 100644
--- a/admin/login.php
+++ b/admin/login.php
@@ -7,6 +7,8 @@ if ($user->hasLogin()) {
 $rememberName = Typecho_Cookie::get('__typecho_remember_name');
 Typecho_Cookie::delete('__typecho_remember_name');
 
+$bodyClass = 'body-100';
+
 include 'header.php';
 ?>
 <div class="typecho-login-wrap">
@@ -45,7 +47,6 @@ include 'common-js.php';
 <script>
 $(document).ready(function () {
     $('#name').focus();
-    $('body').css('height', '100%');
 });
 </script>
 <?php
diff --git a/admin/register.php b/admin/register.php
index 40de30d7..dedce218 100644
--- a/admin/register.php
+++ b/admin/register.php
@@ -9,6 +9,8 @@ $rememberMail = Typecho_Cookie::get('__typecho_remember_mail');
 Typecho_Cookie::delete('__typecho_remember_name');
 Typecho_Cookie::delete('__typecho_remember_mail');
 
+$bodyClass = 'body-100';
+
 include 'header.php';
 ?>
 <div class="typecho-login-wrap">
@@ -41,7 +43,6 @@ include 'common-js.php';
 <script>
 $(document).ready(function () {
     $('#name').focus();
-    $('body').css('height', '100%');
 });
 </script>
 <?php
diff --git a/admin/scss/style.scss b/admin/scss/style.scss
index b7fab4f0..38d087c1 100644
--- a/admin/scss/style.scss
+++ b/admin/scss/style.scss
@@ -43,6 +43,10 @@ code, pre, .mono {
 
 .p { margin: 1em 0; }
 
+.body-100 {
+  height: 100%;
+}
+
 a.balloon-button {
   display: inline-block;
   padding: 0 6px;
@@ -298,11 +302,12 @@ a.button:hover, a.balloon-button:hover {
 }
 .typecho-login {
   display: table-cell;
+  padding-bottom: 100px;
   width: 280px;
   text-align: center;
   vertical-align: middle;
   h1 {
-    margin-bottom: 1em; 
+    margin: 0 0 1em; 
   }
 }