diff --git a/system/admin.php b/system/admin.php
index d1e75de..a017322 100644
--- a/system/admin.php
+++ b/system/admin.php
@@ -129,14 +129,22 @@ if( $page == 'theme_home' || $page == 'theme_login' || $page == 'theme_transit'
         
         //没有缓存 或 禁止缓存 或 缓存过时
         if(empty($template) ||   $_GET['cache'] === 'no'  || time() -  $data["time"] > 1800 ){ 
-            $urls = [ "https://update.lm21.top/TwoNav/{$fn}_template.json"];
+            $urls = [
+                "lm21" => "https://update.lm21.top/TwoNav/{$fn}_template.json",
+                "gitee" => "https://gitee.com/tznb/twonav_updata/raw/master/{$fn}_template.json"
+            ];
+            $Source = $global_config['Update_Source'] ?? '';
+            if (!empty($Source) && isset($urls[$Source])) {
+                $urls = [$Source => $urls[$Source]];
+            }
         }else{
             $cache = true;
         }
-        
+        //读取超时参数
+        $overtime = !isset($global_config['Update_Overtime']) ? 3 : ($global_config['Update_Overtime'] < 3 || $global_config['Update_Overtime'] > 60 ? 3 : $global_config['Update_Overtime']);
         //远程获取
-        foreach($urls as $url){ 
-            $Res = ccurl($url,3);
+        foreach($urls as $key => $url){ 
+            $Res = ccurl($url,$overtime);
             $data = json_decode($Res["content"], true);
             if($data["code"] == 200 ){ //如果获取成功
                 $data["time"] = time(); //记录当前时间
diff --git a/system/api.php b/system/api.php
index ce12537..7975c76 100644
--- a/system/api.php
+++ b/system/api.php
@@ -705,7 +705,7 @@ function write_link(){
         }
 
         $api = Get_Index_URL().'?c=icon&url='.base64_encode($link['url']);
-        $res = ccurl($api);
+        $res = ccurl($api,30);
         $data = get_db('global_icon','*',['url_md5'=>md5($link['url'])]);
         if(empty($data)){
             msg(1,'fail');
@@ -1117,7 +1117,7 @@ function other_testing_link(){
     if ( $global_config['offline'] == '1'){ msg(-1,"离线模式无法使用此功能"); }
     $code = get_http_code($_POST['url']);
     if($code != 200 && $code != 302 && $code != 301){
-        $code = ccurl($_POST['url'])['code'];
+        $code = ccurl($_POST['url'],30)['code'];
     }
     msgA(['code' => 0 ,'StatusCode'=> $code]);
 }
@@ -1453,7 +1453,7 @@ function write_data_control(){
 function read_data(){
     global $USER_DB;
     //指定类型限制仅root账号可用!
-    if(in_array($USER_DB['UserGroup'] != 'root' && $_GET['type'],['diagnostic_log','phpinfo'])){
+    if(in_array($USER_DB['UserGroup'] != 'root' && $_GET['type'],['diagnostic_log','connectivity_test','phpinfo'])){
         msg(-1,'无权限');
     }
     
@@ -1464,7 +1464,24 @@ function read_data(){
         $index_count = get_db('user_count','v',['uid'=>UID,'k'=>date('Ym'),'t'=>'index_Ym'])??0;
         $click_count = get_db('user_count','v',['uid'=>UID,'k'=>date('Ym'),'t'=>'click_Ym'])??0;
         msgA( ['code'=>1,'data'=>[$category_count,$link_count,$index_count,$click_count] ]);
-        
+    //连通测试
+    }elseif($_GET['type'] == 'connectivity_test'){
+        $ch = curl_init();
+        curl_setopt($ch, CURLOPT_URL, $_POST['url']);
+        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+        $start = microtime(true);
+        $response = curl_exec($ch);
+        $end = microtime(true);
+        $time = round(($end - $start) * 1000, 2);
+        if(curl_errno($ch)) {
+            $log .= "请求发生错误：".curl_error($ch);
+        } else {
+            $log .= "响应内容：".$response ?? 'Null' ;
+            $log .= ",访问耗时：{$time} 毫秒。" ;
+        }
+        curl_close($ch);
+        msg(1,$log);
     //一键诊断
     }elseif($_GET['type'] == 'diagnostic_log'){
         clearstatcache(); //清除缓存
diff --git a/system/api_root.php b/system/api_root.php
index 2cfba49..9ffb4d6 100644
--- a/system/api_root.php
+++ b/system/api_root.php
@@ -48,10 +48,20 @@ function other_upsys(){
         }
         //设置执行最长时间，0为无限制。单位秒!
         set_time_limit(5*60);
+        $overtime = !isset($GLOBALS['global_config']['Update_Overtime']) ? 3 : ($GLOBALS['global_config']['Update_Overtime'] < 3 || $GLOBALS['global_config']['Update_Overtime'] > 60 ? 3 : $GLOBALS['global_config']['Update_Overtime']);
+        
         //加载远程数据
-        $urls = [ "https://update.lm21.top/TwoNav/updata.json"];
-        foreach($urls as $url){ 
-            $Res = ccurl($url,3);
+        $urls = [
+                "lm21" => "https://update.lm21.top/TwoNav/updata.json",
+                "gitee" => "https://gitee.com/tznb/twonav_updata/raw/master/updata.json"
+            ];
+        $Source = $GLOBALS['global_config']['Update_Source'] ?? '';
+        if (!empty($Source) && isset($urls[$Source])) {
+            $urls = [$Source => $urls[$Source]];
+        }
+            
+        foreach($urls as $key => $url){ 
+            $Res = ccurl($url,$overtime);
             $data = json_decode($Res["content"], true);
             if($data["code"] == 200 ){ //如果获取成功
                 break; //跳出循环.
@@ -537,6 +547,9 @@ function write_sys_settings(){
         'global_header'=>['empty'=>true],
         'global_footer'=>['empty'=>true],
         'api_extend'=>['empty'=>true],
+        //更新设置
+        'Update_Source'=>['empty'=>true],
+        'Update_Overtime'=>['int'=>true,'min'=>3,'max'=>60,'msg'=>'资源超时参数错误'],
         //扩展功能-(全局开关)
         'apply'=>['int'=>true,'min'=>0,'max'=>1,'msg'=>'收录管理参数错误'],
         'guestbook'=>['int'=>true,'min'=>0,'max'=>1,'msg'=>'留言管理参数错误'],
diff --git a/system/click.php b/system/click.php
index f2184f7..352056f 100644
--- a/system/click.php
+++ b/system/click.php
@@ -128,6 +128,9 @@ if($global_config['link_extend'] == 1 && check_purview('link_extend',1) && in_ar
     $extend = empty($link['extend']) ? [] : unserialize($link['extend']);
 }
 
+//载入过渡页设置
+$transition_page = unserialize(get_db("user_config", "v", ["uid"=>UID,"k"=>"s_transition_page"]));
+
 //如果存在备用链接,则强制载入过渡页
 if(!empty($link['url_standby'])) {
     $link['url_standby'] = unserialize($link['url_standby']);
diff --git a/system/install.php b/system/install.php
index 5914d6c..8eca803 100644
--- a/system/install.php
+++ b/system/install.php
@@ -447,6 +447,25 @@ set_db_type(db_type);
 layui.use(['form'], function(){
     var form = layui.form;
     
+    //伪静态检测
+    var request = new XMLHttpRequest();
+    request.open('GET', './static/Other/login.css?t=' + new Date().getTime(), true);
+    request.onload = function() {
+      if (request.status >= 200 && request.status < 400) {
+        var fileContent = request.responseText;
+        if (fileContent.startsWith('<!DOCTYPE html>')) {
+            layer.alert(
+                "系统检测到您的站点可能配置了不属于TwoNav的伪静态规则<br />通常是因为之前使用过其他程序,例如:OneNav Extend 或 OneNav <br />您需要将它清除,否则会影响到程序的正常使用 ( 如登录页异常 )<br />并在安装完成后在站长工具>生成伪静态>重新配置到站点中"
+                ,{title:'环境异常提示',anim: 2,closeBtn: 0,btn: ['刷新页面']},function () {
+                    location.reload();
+                }
+            );
+        }
+      }
+    };
+    request.send();
+    
+    
     //开始安装
     form.on('submit(register)', function(data){
         var d = data.field;
@@ -510,12 +529,12 @@ function open_msg(u,p){
     layer.open({ //弹出结果
     type: 1
     ,title: '安装成功'
-    ,area: ['230px', '220px']
+    ,area: ['230px', '260px']
     ,maxmin: false
     ,shadeClose: false
     ,resize: false
     ,closeBtn: 0
-    ,content: '<div style="padding: 15px;">管理员账号: '+u+'<br>管理员密码: '+p+'<br><h3><a href="?c=admin&u='+u+'" style="color: #0000FF;" class="fl">  <br> >>点我进入后台</a></h3><h3><a href="?u='+u+'" style="color: #0000FF;" class="fl">  <br> >>点我进入首页</a></h3></div>'
+    ,content: '<div style="padding: 15px;">管理员账号: '+u+'<br>管理员密码: '+p+'<br><h3><a href="?c=admin&u='+u+'" style="color: #0000FF;" class="fl">  <br> >>点我进入后台</a></h3><h3><a href="?u='+u+'" style="color: #0000FF;" class="fl">  <br> >>点我进入首页</a></h3>  <h3><a href="https://gitee.com/tznb/TwoNav/wikis/%E5%AE%89%E8%A3%85%E6%95%99%E7%A8%8B/%E5%AE%89%E5%85%A8%E9%85%8D%E7%BD%AE" style="color: #0000FF;" class="fl" target="_blank">  <br> >>安全配置说明</a></h3> </div>'
     });
 }
 
diff --git a/system/version.txt b/system/version.txt
index 4475360..c702375 100644
--- a/system/version.txt
+++ b/system/version.txt
@@ -1 +1 @@
-v2.0.26-20230611
\ No newline at end of file
+v2.0.27-20230618
\ No newline at end of file
diff --git a/templates/admin/page/home.php b/templates/admin/page/home.php
index aa5a6c5..e95bbb4 100644
--- a/templates/admin/page/home.php
+++ b/templates/admin/page/home.php
@@ -14,14 +14,27 @@ if(!empty($Notice)){
 }
 //是否下载数据
 if(!offline && $reload){
-    $Res = ccurl('https://update.lm21.top/TwoNav/Notice.json',3);
-    $new_data = json_decode($Res['content'], true);unset($Res);
-    if($new_data["code"] == 200 ){ //下载成功,写入缓存
-        $new_data['download_time'] = time();
-        write_global_config('notice',json_encode($new_data),'官方公告(缓存)');
-        $data = $new_data;
+    $overtime = !isset($global_config['Update_Overtime']) ? 3 : ($global_config['Update_Overtime'] < 3 || $global_config['Update_Overtime'] > 60 ? 3 : $global_config['Update_Overtime']);
+    $urls = [
+        "lm21" => "https://update.lm21.top/TwoNav/Notice.json",
+        "gitee" => "https://gitee.com/tznb/twonav_updata/raw/master/Notice.json"
+    ];
+    $Source = $global_config['Update_Source'] ?? '';
+    if (!empty($Source) && isset($urls[$Source])) {
+        $urls = [$Source => $urls[$Source]];
+    }
+    
+    foreach($urls as $key => $url){ 
+        $Res = ccurl($url,$overtime);
+        $new_data = json_decode($Res['content'], true);unset($Res);
+        if($new_data["code"] == 200 ){ //下载成功,写入缓存
+            $new_data['download_time'] = time();
+            write_global_config('notice',json_encode($new_data),'官方公告(缓存)');
+            $data = $new_data;
+            unset($new_data);
+            break;
+        }
     }
-    unset($new_data);
 }
 //判断是否为空
 if(empty($data['version'])){
diff --git a/templates/admin/page/root/sys_setting.php b/templates/admin/page/root/sys_setting.php
index 32930b7..656cf89 100644
--- a/templates/admin/page/root/sys_setting.php
+++ b/templates/admin/page/root/sys_setting.php
@@ -180,14 +180,35 @@ $title='系统设置';require(dirname(__DIR__).'/header.php');
                 </div>
             </div>
 
-            <div class="layui-form-item" id="api_extend" style="display:none;">
-                <label class="layui-form-label required">api_extend</label>
+            <div class="layui-form-item layui-hide" id="api_extend">
+                <label class="layui-form-label">api_extend</label>
                 <div class="layui-input-inline">
                     <select name="api_extend">
                         <option value="0" selected="">关闭</option>
                         <option value="1" >开启</option>
                     </select>
                 </div>
+                <div class="layui-form-mid layui-word-aux">请勿开启!请勿开启!请勿开启!</div>
+            </div>
+
+            <div class="layui-form-item layui-hide">
+                <label class="layui-form-label">资源接口</label>
+                <div class="layui-input-inline">
+                    <select name="Update_Source">
+                        <option value="0" selected="">自动</option>
+                        <option value="lm21">主线路</option>
+                        <option value="gitee">备用线路(gitee)</option>
+                    </select>
+                </div>
+                <div class="layui-form-mid layui-word-aux">备用资源不定期更新,非必要请勿使用!</div>
+            </div>
+            
+            <div class="layui-form-item layui-hide">
+                <label class="layui-form-label">资源超时</label>
+                <div class="layui-input-inline">
+                    <input type="number" name="Update_Overtime" autocomplete="off" value="3" class="layui-input">
+                </div>
+                <div class="layui-form-mid layui-word-aux">默认3秒,范围3-60</div>
             </div>
             
             <fieldset class="layui-elem-field layui-field-title" style="margin-top: 30px;"><legend>扩展功能</legend></fieldset>
@@ -279,8 +300,6 @@ layui.use(['jquery','form'], function () {
     form.val('form', <?php echo json_encode($global_config);?>);
     form.val('form', <?php echo json_encode(unserialize( get_db("global_config", "v", ["k" => "length_limit"])));?>);
 
-
-
     //监听提交
     form.on('submit(save)', function (data) {
         $.post('./index.php?c=api&method=write_sys_settings&u='+u,data.field,function(data,status){
@@ -299,14 +318,13 @@ layui.use(['jquery','form'], function () {
     
     //开启隐藏功能
     $('.layui-elem-field').click(function () {
-        if(Number( $(this).attr('click')) >= 6){
-            $("#api_extend").show();
-        }else{
-            let click = $(this).attr('click') ? Number($(this).attr('click')) + 1 : 0;
-            $(this).attr('click',click)
+        let clickCount = Number($(this).attr('click') || 0);
+        if (clickCount >= 6) {
+            $(".layui-hide").removeClass("layui-hide");
+        } else {
+            $(this).attr('click', clickCount + 1);
         }
-        
-    }); 
+    });
     
 });
 </script>
diff --git a/templates/admin/page/root/tool.php b/templates/admin/page/root/tool.php
index 73b73ec..4f1a366 100644
--- a/templates/admin/page/root/tool.php
+++ b/templates/admin/page/root/tool.php
@@ -18,6 +18,7 @@ require(dirname(__DIR__).'/header.php');
         <div class="layui-btn-container">
             <button type="button" class="layui-btn copy_log">复制内容</button>
             <button type="button" class="layui-btn diagnose">一键诊断</button>
+            <button type="button" class="layui-btn connectivity_test">连通测试</button>
             <button type="button" class="layui-btn phpinfo">phpinfo</button>
 <?php if(preg_match('/nginx/i',$_SERVER['SERVER_SOFTWARE']) ){ ?>
             <button type="button" class="layui-btn rewrite">生成伪静态</button>
@@ -75,6 +76,34 @@ layui.use(['layer','form','miniTab'], function () {
         });
     });
     
+    //连通测试
+    $('.connectivity_test').on('click', function(){
+        $("#console_log").text("");
+        $("#console_log").append("浏览器UA：" + navigator.userAgent +"\n");
+        $("#console_log").append("客户端时间：" +  timestampToTime(Math.round(new Date() / 1000) ) +"\n");
+        
+        var urls = [
+          ['主线路', 'https://update.lm21.top/connectivity_test.txt'],
+          ['备用线路(Gitee)', 'https://gitee.com/tznb/twonav_updata/raw/master/connectivity_test.txt']
+        ];
+        urls.forEach(function(route) {
+          var routeName = route[0];
+          var url = route[1];
+          $("#console_log").append("正在检测: " + routeName +"\n");
+          $.ajax({
+            url: get_api('read_data', 'connectivity_test'),
+            type: 'POST',
+            data: { url: url },
+            async: false,
+            success: function(data, status) {
+              $("#console_log").append(data.msg + "\n");
+            },
+            error: function(jqXHR, textStatus, errorThrown) {
+              $("#console_log").append(routeName + ": 请求 " + url + " 发生错误：" + errorThrown + "\n");
+            }
+          });
+        });
+    });
     //phpinfo
     $('.phpinfo').on('click', function(){
         layer.open({
diff --git a/templates/admin/page/updatelog.php b/templates/admin/page/updatelog.php
index 8cac894..9f7b19f 100644
--- a/templates/admin/page/updatelog.php
+++ b/templates/admin/page/updatelog.php
@@ -2,6 +2,21 @@
 <body>
 <div class="layuimini-container">
  <div class="layuimini-main" style=" margin-left: 20px;">
+    <li class="layui-timeline-item">
+        <i class="layui-icon layui-timeline-axis"></i>
+        <div class="layui-timeline-content layui-text">
+            <h4 class="layui-timeline-title">v2.0.27-20230618</h4>
+            <ul>
+                <li>[优化] 增加在线数据冗余线路,以适应更多环境</li>
+                <li>[优化] 安装时检测是否存在不属于本程序的伪静态规则,存在时提醒用户处理</li>
+                <li>[优化] 安装成功提示内容添加安全配置说明</li>
+                <li>[新增] 站长工具新增连通测试,用于检测是否能与资源服务器连通! </li>
+                <li>[模板] 主页模板 WebStack-Hugo, 新增拖拽排序支持(默认关闭),修复使用分类个性图标时无法定位分类,优化iframe的自适应</li>
+                <li>[模板] 非默认登录模板无法登录的bug</li>
+                <li>[修复] 过度页停留时间设置无效的bug</li>
+            </ul>
+        </div>
+    </li>
     <li class="layui-timeline-item">
         <i class="layui-icon layui-timeline-axis"></i>
         <div class="layui-timeline-content layui-text">