diff --git a/public/css/chat.css b/public/css/chat.css
index cd04be3..c3fd54e 100644
--- a/public/css/chat.css
+++ b/public/css/chat.css
@@ -801,17 +801,9 @@ a:hover {
         color: #fff;
     }
 
-    /* ── 名单/房间抽屉：限制最大高度，内部用户列表区启用滚动 ── */
+    /* ── 名单/房间抽屉：限定高度，内部 flex 子项才能正确贡献高度 ── */
     #mobile-drawer-users {
-        max-height: 80vh;
-    }
-
-    #mobile-drawer-users .mobile-drawer-body {
-        overflow: hidden;
-        display: flex;
-        flex-direction: column;
-        flex: 1;
-        min-height: 0;
+        height: 80vh;
     }
 
     #mobile-drawer-users .mobile-right-clone {