diff --git a/xuanxuan/module/im/ext/css/debug/debug.css b/xuanxuan/module/im/ext/css/debug/debug.css
new file mode 100644
index 0000000000..32e70355cc
--- /dev/null
+++ b/xuanxuan/module/im/ext/css/debug/debug.css
@@ -0,0 +1 @@
+.container {margin: 0 auto}