diff --git a/usr/themes/default/grid.css b/usr/themes/default/grid.css
new file mode 100644
index 00000000..c7a31053
--- /dev/null
+++ b/usr/themes/default/grid.css
@@ -0,0 +1,563 @@
+/*
+ * Bento Grid System
+ * Source: https://github.com/fenbox/bento
+ * Version: 1.2.7
+ * Update: 2013.11.15
+ */
+.colgroup [class*="col-"] {
+  float: left;
+  min-height: 1px;
+  padding-right: 10px;
+  padding-left: 10px;
+  -webkit-box-sizing: border-box;
+  -moz-box-sizing: border-box;
+  box-sizing: border-box; }
+
+.colgroup [class*="push-"],
+.colgroup [class*="pull-"] {
+  position: relative; }
+
+/*
+ * Mobile and up
+ */
+.col-mb-1 {
+  width: 8.33333%; }
+
+.col-mb-2 {
+  width: 16.66667%; }
+
+.col-mb-3 {
+  width: 25%; }
+
+.col-mb-4 {
+  width: 33.33333%; }
+
+.col-mb-5 {
+  width: 41.66667%; }
+
+.col-mb-6 {
+  width: 50%; }
+
+.col-mb-7 {
+  width: 58.33333%; }
+
+.col-mb-8 {
+  width: 66.66667%; }
+
+.col-mb-9 {
+  width: 75%; }
+
+.col-mb-10 {
+  width: 83.33333%; }
+
+.col-mb-11 {
+  width: 91.66667%; }
+
+.col-mb-12 {
+  width: 100%; }
+
+/*
+ * Tablet and up
+ */
+@media (min-width: 768px) {
+  .container {
+    margin-left: auto;
+    margin-right: auto;
+    max-width: 728px; }
+
+  .col-tb-1 {
+    width: 8.33333%; }
+
+  .col-tb-2 {
+    width: 16.66667%; }
+
+  .col-tb-3 {
+    width: 25%; }
+
+  .col-tb-4 {
+    width: 33.33333%; }
+
+  .col-tb-5 {
+    width: 41.66667%; }
+
+  .col-tb-6 {
+    width: 50%; }
+
+  .col-tb-7 {
+    width: 58.33333%; }
+
+  .col-tb-8 {
+    width: 66.66667%; }
+
+  .col-tb-9 {
+    width: 75%; }
+
+  .col-tb-10 {
+    width: 83.33333%; }
+
+  .col-tb-11 {
+    width: 91.66667%; }
+
+  .col-tb-12 {
+    width: 100%; }
+
+  .col-tb-offset-0 {
+    margin-left: 0%; }
+
+  .col-tb-offset-1 {
+    margin-left: 8.33333%; }
+
+  .col-tb-offset-2 {
+    margin-left: 16.66667%; }
+
+  .col-tb-offset-3 {
+    margin-left: 25%; }
+
+  .col-tb-offset-4 {
+    margin-left: 33.33333%; }
+
+  .col-tb-offset-5 {
+    margin-left: 41.66667%; }
+
+  .col-tb-offset-6 {
+    margin-left: 50%; }
+
+  .col-tb-offset-7 {
+    margin-left: 58.33333%; }
+
+  .col-tb-offset-8 {
+    margin-left: 66.66667%; }
+
+  .col-tb-offset-9 {
+    margin-left: 75%; }
+
+  .col-tb-offset-10 {
+    margin-left: 83.33333%; }
+
+  .col-tb-offset-11 {
+    margin-left: 91.66667%; }
+
+  .col-tb-offset-12 {
+    margin-left: 100%; }
+
+  .col-tb-pull-0 {
+    right: 0%; }
+
+  .col-tb-pull-1 {
+    right: 8.33333%; }
+
+  .col-tb-pull-2 {
+    right: 16.66667%; }
+
+  .col-tb-pull-3 {
+    right: 25%; }
+
+  .col-tb-pull-4 {
+    right: 33.33333%; }
+
+  .col-tb-pull-5 {
+    right: 41.66667%; }
+
+  .col-tb-pull-6 {
+    right: 50%; }
+
+  .col-tb-pull-7 {
+    right: 58.33333%; }
+
+  .col-tb-pull-8 {
+    right: 66.66667%; }
+
+  .col-tb-pull-9 {
+    right: 75%; }
+
+  .col-tb-pull-10 {
+    right: 83.33333%; }
+
+  .col-tb-pull-11 {
+    right: 91.66667%; }
+
+  .col-tb-pull-12 {
+    right: 100%; }
+
+  .col-tb-push-0 {
+    left: 0%; }
+
+  .col-tb-push-1 {
+    left: 8.33333%; }
+
+  .col-tb-push-2 {
+    left: 16.66667%; }
+
+  .col-tb-push-3 {
+    left: 25%; }
+
+  .col-tb-push-4 {
+    left: 33.33333%; }
+
+  .col-tb-push-5 {
+    left: 41.66667%; }
+
+  .col-tb-push-6 {
+    left: 50%; }
+
+  .col-tb-push-7 {
+    left: 58.33333%; }
+
+  .col-tb-push-8 {
+    left: 66.66667%; }
+
+  .col-tb-push-9 {
+    left: 75%; }
+
+  .col-tb-push-10 {
+    left: 83.33333%; }
+
+  .col-tb-push-11 {
+    left: 91.66667%; }
+
+  .col-tb-push-12 {
+    left: 100%; }
+
+  .colgroup {
+    margin-right: -10px;
+    margin-left: -10px; } }
+/*
+ * Desktop and up
+ */
+@media (min-width: 992px) {
+  .container {
+    max-width: 952px; }
+
+  .col-1 {
+    width: 8.33333%; }
+
+  .col-2 {
+    width: 16.66667%; }
+
+  .col-3 {
+    width: 25%; }
+
+  .col-4 {
+    width: 33.33333%; }
+
+  .col-5 {
+    width: 41.66667%; }
+
+  .col-6 {
+    width: 50%; }
+
+  .col-7 {
+    width: 58.33333%; }
+
+  .col-8 {
+    width: 66.66667%; }
+
+  .col-9 {
+    width: 75%; }
+
+  .col-10 {
+    width: 83.33333%; }
+
+  .col-11 {
+    width: 91.66667%; }
+
+  .col-12 {
+    width: 100%; }
+
+  .col-offset-0 {
+    margin-left: 0%; }
+
+  .col-offset-1 {
+    margin-left: 8.33333%; }
+
+  .col-offset-2 {
+    margin-left: 16.66667%; }
+
+  .col-offset-3 {
+    margin-left: 25%; }
+
+  .col-offset-4 {
+    margin-left: 33.33333%; }
+
+  .col-offset-5 {
+    margin-left: 41.66667%; }
+
+  .col-offset-6 {
+    margin-left: 50%; }
+
+  .col-offset-7 {
+    margin-left: 58.33333%; }
+
+  .col-offset-8 {
+    margin-left: 66.66667%; }
+
+  .col-offset-9 {
+    margin-left: 75%; }
+
+  .col-offset-10 {
+    margin-left: 83.33333%; }
+
+  .col-offset-11 {
+    margin-left: 91.66667%; }
+
+  .col-offset-12 {
+    margin-left: 100%; }
+
+  .col-pull-0 {
+    right: 0%; }
+
+  .col-pull-1 {
+    right: 8.33333%; }
+
+  .col-pull-2 {
+    right: 16.66667%; }
+
+  .col-pull-3 {
+    right: 25%; }
+
+  .col-pull-4 {
+    right: 33.33333%; }
+
+  .col-pull-5 {
+    right: 41.66667%; }
+
+  .col-pull-6 {
+    right: 50%; }
+
+  .col-pull-7 {
+    right: 58.33333%; }
+
+  .col-pull-8 {
+    right: 66.66667%; }
+
+  .col-pull-9 {
+    right: 75%; }
+
+  .col-pull-10 {
+    right: 83.33333%; }
+
+  .col-pull-11 {
+    right: 91.66667%; }
+
+  .col-pull-12 {
+    right: 100%; }
+
+  .col-push-0 {
+    left: 0%; }
+
+  .col-push-1 {
+    left: 8.33333%; }
+
+  .col-push-2 {
+    left: 16.66667%; }
+
+  .col-push-3 {
+    left: 25%; }
+
+  .col-push-4 {
+    left: 33.33333%; }
+
+  .col-push-5 {
+    left: 41.66667%; }
+
+  .col-push-6 {
+    left: 50%; }
+
+  .col-push-7 {
+    left: 58.33333%; }
+
+  .col-push-8 {
+    left: 66.66667%; }
+
+  .col-push-9 {
+    left: 75%; }
+
+  .col-push-10 {
+    left: 83.33333%; }
+
+  .col-push-11 {
+    left: 91.66667%; }
+
+  .col-push-12 {
+    left: 100%; } }
+/*
+ * Widescreen and up
+ */
+@media (min-width: 1200px) {
+  .container {
+    max-width: 1160px; }
+
+  .col-wd-1 {
+    width: 8.33333%; }
+
+  .col-wd-2 {
+    width: 16.66667%; }
+
+  .col-wd-3 {
+    width: 25%; }
+
+  .col-wd-4 {
+    width: 33.33333%; }
+
+  .col-wd-5 {
+    width: 41.66667%; }
+
+  .col-wd-6 {
+    width: 50%; }
+
+  .col-wd-7 {
+    width: 58.33333%; }
+
+  .col-wd-8 {
+    width: 66.66667%; }
+
+  .col-wd-9 {
+    width: 75%; }
+
+  .col-wd-10 {
+    width: 83.33333%; }
+
+  .col-wd-11 {
+    width: 91.66667%; }
+
+  .col-wd-12 {
+    width: 100%; }
+
+  .col-wd-offset-0 {
+    margin-left: 0%; }
+
+  .col-wd-offset-1 {
+    margin-left: 8.33333%; }
+
+  .col-wd-offset-2 {
+    margin-left: 16.66667%; }
+
+  .col-wd-offset-3 {
+    margin-left: 25%; }
+
+  .col-wd-offset-4 {
+    margin-left: 33.33333%; }
+
+  .col-wd-offset-5 {
+    margin-left: 41.66667%; }
+
+  .col-wd-offset-6 {
+    margin-left: 50%; }
+
+  .col-wd-offset-7 {
+    margin-left: 58.33333%; }
+
+  .col-wd-offset-8 {
+    margin-left: 66.66667%; }
+
+  .col-wd-offset-9 {
+    margin-left: 75%; }
+
+  .col-wd-offset-10 {
+    margin-left: 83.33333%; }
+
+  .col-wd-offset-11 {
+    margin-left: 91.66667%; }
+
+  .col-wd-offset-12 {
+    margin-left: 100%; }
+
+  .col-wd-pull-0 {
+    right: 0%; }
+
+  .col-wd-pull-1 {
+    right: 8.33333%; }
+
+  .col-wd-pull-2 {
+    right: 16.66667%; }
+
+  .col-wd-pull-3 {
+    right: 25%; }
+
+  .col-wd-pull-4 {
+    right: 33.33333%; }
+
+  .col-wd-pull-5 {
+    right: 41.66667%; }
+
+  .col-wd-pull-6 {
+    right: 50%; }
+
+  .col-wd-pull-7 {
+    right: 58.33333%; }
+
+  .col-wd-pull-8 {
+    right: 66.66667%; }
+
+  .col-wd-pull-9 {
+    right: 75%; }
+
+  .col-wd-pull-10 {
+    right: 83.33333%; }
+
+  .col-wd-pull-11 {
+    right: 91.66667%; }
+
+  .col-wd-pull-12 {
+    right: 100%; }
+
+  .col-wd-push-0 {
+    left: 0%; }
+
+  .col-wd-push-1 {
+    left: 8.33333%; }
+
+  .col-wd-push-2 {
+    left: 16.66667%; }
+
+  .col-wd-push-3 {
+    left: 25%; }
+
+  .col-wd-push-4 {
+    left: 33.33333%; }
+
+  .col-wd-push-5 {
+    left: 41.66667%; }
+
+  .col-wd-push-6 {
+    left: 50%; }
+
+  .col-wd-push-7 {
+    left: 58.33333%; }
+
+  .col-wd-push-8 {
+    left: 66.66667%; }
+
+  .col-wd-push-9 {
+    left: 75%; }
+
+  .col-wd-push-10 {
+    left: 83.33333%; }
+
+  .col-wd-push-11 {
+    left: 91.66667%; }
+
+  .col-wd-push-12 {
+    left: 100%; } }
+/*
+ * Responsive kit
+ */
+@media (max-width: 767px) {
+  .kit-hidden-mb {
+    display: none; } }
+@media (max-width: 991px) {
+  .kit-hidden-tb {
+    display: none; } }
+@media (max-width: 1199px) {
+  .kit-hidden {
+    display: none; } }
+/*
+ * Clearfix
+ */
+.clearfix, .colgroup {
+  zoom: 1; }
+  .clearfix:before, .colgroup:before, .clearfix:after, .colgroup:after {
+    content: " ";
+    display: table; }
+  .clearfix:after, .colgroup:after {
+    clear: both; }
diff --git a/usr/themes/default/header.php b/usr/themes/default/header.php
index eef16326..a0c67cf7 100644
--- a/usr/themes/default/header.php
+++ b/usr/themes/default/header.php
@@ -13,13 +13,13 @@
         ), '', ' - '); ?><?php $this->options->title(); ?></title>
 
     <!-- 使用url函数转换相关路径 -->
-    <link rel="stylesheet" href="<?php $this->options->adminUrl('css/normalize.css'); ?>">
-    <link rel="stylesheet" href="<?php $this->options->adminUrl('css/grid.css'); ?>">
+    <link rel="stylesheet" href="http://cdn.staticfile.org/normalize/2.1.3/normalize.min.css">
+    <link rel="stylesheet" href="<?php $this->options->themeUrl('grid.css'); ?>">
     <link rel="stylesheet" href="<?php $this->options->themeUrl('style.css'); ?>">
 
     <!--[if lt IE 9]>
-    <script src="<?php $this->options->adminUrl('js/html5shiv.js'); ?>"></script>
-    <script src="<?php $this->options->adminUrl('js/respond.js'); ?>"></script>
+    <script src="http://cdn.staticfile.org/html5shiv/r29/html5.min.js"></script>
+    <script src="http://cdn.staticfile.org/respond.js/1.3.0/respond.min.js"></script>
     <![endif]-->
 
     <!-- 通过自有函数输出HTML头部信息 -->
diff --git a/var/Typecho/Validate.php b/var/Typecho/Validate.php
index f186c0d9..f5e8fab0 100644
--- a/var/Typecho/Validate.php
+++ b/var/Typecho/Validate.php
@@ -110,7 +110,8 @@ class Typecho_Validate
         // Cycle through the rules and test for errors
         foreach ($rules as $key => $rules) {
             $this->_key = $key;
-            $data[$key] = (0 == strlen($data[$key])) ? NULL : $data[$key];
+            $data[$key] = (is_array($data[$key]) ? 0 == count($data[$key])
+                : 0 == strlen($data[$key])) ? NULL : $data[$key];
 
             foreach ($rules as $params) {
                 $method = $params[0];
diff --git a/var/Widget/Options/General.php b/var/Widget/Options/General.php
index 59de4a55..5d0bced3 100644
--- a/var/Widget/Options/General.php
+++ b/var/Widget/Options/General.php
@@ -148,7 +148,7 @@ class Widget_Options_General extends Widget_Abstract_Options implements Widget_I
         }
 
         $settings = $this->request->from('title', 'siteUrl', 'description', 'keywords', 'allowRegister', 'timezone', 'attachmentTypes');
-        $settings['siteUrl'] = rtrim('/', $settings['url']);
+        $settings['siteUrl'] = rtrim($settings['siteUrl'], '/');
 
         $attachmentTypes = array();
         if ($this->isEnableByCheckbox($settings['attachmentTypes'], '@image@')) {