diff --git a/backend/public/install/templates/step5.php b/backend/public/install/templates/step5.php
index 484e47f06..4aa13a4e5 100755
--- a/backend/public/install/templates/step5.php
+++ b/backend/public/install/templates/step5.php
@@ -35,7 +35,7 @@ $host = $_SERVER['HTTP_HOST'];
             <a href="<?php echo 'http://'.$host;?>" class="btn mid">进入前台</a>
         </div>
         <div class="admin btn">
-            <a href="<?php echo 'http://'.$host;?>/admin" class="btn btn_submit J_install_btn mid">进入后台</a>
+            <a href="<?php echo 'http://'.$host;?>/admin/" class="btn btn_submit J_install_btn mid">进入后台</a>
         </div>
       </div>
     </div>
diff --git a/docker/nginx/vhost.conf b/docker/nginx/vhost.conf
index fdad80941..1496d5e02 100644
--- a/docker/nginx/vhost.conf
+++ b/docker/nginx/vhost.conf
@@ -6,6 +6,9 @@ server {
 
     root /var/www/public;
 
+    # 端口映射场景（宿主机 8011 -> 容器 80）：目录补斜杠 301 使用相对 Location，
+    # 避免跳转后丢失宿主机映射端口
+    absolute_redirect off;
 
     location / {
         # try_files $uri /index.php$is_args$args;