diff --git a/usr/themes/default/archive.php b/usr/themes/default/archive.php
index f774c13d..16b7bd92 100644
--- a/usr/themes/default/archive.php
+++ b/usr/themes/default/archive.php
@@ -1,6 +1,6 @@
 <?php $this->need('header.php'); ?>
 
-    <div class="grid_10" id="content">
+    <div class="grid_12" id="content">
     <?php if ($this->have()): ?>
 	<?php while($this->next()): ?>
         <div class="post">
diff --git a/usr/themes/default/header.php b/usr/themes/default/header.php
index dd8ecaa2..bddc7215 100644
--- a/usr/themes/default/header.php
+++ b/usr/themes/default/header.php
@@ -13,7 +13,7 @@
 
 <body>
 <div id="header" class="container_16 clearfix">
-    <div class="grid_14">
+    <div class="grid_16">
     	<form id="search" method="post" action="/">
     		<div><input type="text" name="s" class="text" size="20" /> <input type="submit" class="submit" value="<?php _e('搜索'); ?>" /></div>
         </form>
diff --git a/usr/themes/default/index.php b/usr/themes/default/index.php
index 89c41442..82423218 100644
--- a/usr/themes/default/index.php
+++ b/usr/themes/default/index.php
@@ -11,7 +11,7 @@
  $this->need('header.php');
  ?>
 
-    <div class="grid_10" id="content">
+    <div class="grid_12" id="content">
 	<?php while($this->next()): ?>
         <div class="post">
 			<h2 class="entry_title"><a href="<?php $this->permalink() ?>"><?php $this->title() ?></a></h2>
diff --git a/usr/themes/default/page.php b/usr/themes/default/page.php
index 59f4b0cd..97034961 100644
--- a/usr/themes/default/page.php
+++ b/usr/themes/default/page.php
@@ -1,6 +1,6 @@
 <?php $this->need('header.php'); ?>
 
-    <div class="grid_10" id="content">
+    <div class="grid_12" id="content">
         <div class="post">
 			<h2 class="entry_title"><a href="<?php $this->permalink() ?>"><?php $this->title() ?></a></h2>
 			<p class="entry_data">
diff --git a/usr/themes/default/post.php b/usr/themes/default/post.php
index 59a43e67..d0d87873 100644
--- a/usr/themes/default/post.php
+++ b/usr/themes/default/post.php
@@ -1,6 +1,6 @@
 <?php $this->need('header.php'); ?>
 
-    <div class="grid_10" id="content">
+    <div class="grid_12" id="content">
         <div class="post">
 			<h2 class="entry_title"><a href="<?php $this->permalink() ?>"><?php $this->title() ?></a></h2>
 			<p class="entry_data">
diff --git a/usr/themes/default/style.css b/usr/themes/default/style.css
index 3f296610..dee18f0b 100644
--- a/usr/themes/default/style.css
+++ b/usr/themes/default/style.css
@@ -94,11 +94,6 @@ legend      { font-weight: bold; }
 
 ul { list-style-type: disc; }
 
-/* -------------------------
- * reset width to 840px
- * ---------------------- */
-.container_16 { width: 840px; }
-
 /* ------------------
  * header
  * --------------- */
@@ -188,7 +183,7 @@ width: 100%;
 }
 
 .post img {
-max-width: 570px;
+max-width: 680px;
 margin: 5px;
 }
 
