diff --git a/web/src/assets/css/main.less b/web/src/assets/css/main.less
index e07eea9b..e899c0fe 100644
--- a/web/src/assets/css/main.less
+++ b/web/src/assets/css/main.less
@@ -1,6 +1,6 @@
 :root {
     // 如果要变更中间栏的大小，修改此处即可
-    --content-main: 1000px;
+    --content-main: 900px;
 }
 
 .app-container {