diff --git a/app.apk b/app.apk
index 543107e..927dabd 100644
Binary files a/app.apk and b/app.apk differ
diff --git a/main/assets/home.htm b/main/assets/home.htm
index be16958..18fbca5 100644
--- a/main/assets/home.htm
+++ b/main/assets/home.htm
@@ -5,6 +5,7 @@
 <title>主页</title>
 </head>
 <style>
+h4 { margin:10px; }
 div { user-select:none; }
 a { text-decoration:none; }
 span { display:inline-block; margin:5px; }
@@ -14,12 +15,15 @@ img { vertical-align:middle; }
 .operation:hover { cursor:hand; color:black; }
 .menu { position:absolute; background:white; border:1px solid gray; width:100px; display:none; }
 .menu div:hover { background:#ddd; }
+#div_logo { text-align:center; }
+#div_search { text-align:center; white-space:nowrap; }
 #list a { margin:10px; width:50px; height:75px; display:inline-block; text-align:center; white-space:nowrap; overflow:hidden; color:black; }
 #list button { width:50px; height:50px; font-size:40px; }
+#div_buttons { text-align:center; }
 </style>
 <body>
-<center><img src="logo.png"></center>
-<div align="center">
+<div id="div_logo"><img src="logo.png"></div>
+<div id="div_search">
 <select id="search_engine">
 <option value="https://www.baidu.com/s?wd=%s">百度</option>
 <option value="https://cn.bing.com/search?q=%s">必应</option>
@@ -33,10 +37,10 @@ img { vertical-align:middle; }
 <div id="list"></div>
 <div id="menu" class="menu"><div id="menu_modify">修改</div><div id="menu_delete">删除</div></div>
 <dialog id="dialog">
-<h2 align="center" id="type"></h2>
+<h4 align="center" id="type"></h4>
 <input type="text" id="title" placeholder="标题" value=""><p>
 <input type="text" id="website" placeholder="https://" value=""><p>
-<center><button id="button_confirm">确定</button> <button id="button_cancel">取消</button></center>
+<div id="div_buttons"><button id="button_confirm">确定</button> <button id="button_cancel">取消</button></div>
 </dialog>
 <script>
 var json, id, timer, title1, website1, type1;
