diff --git a/static/js/chat.js b/static/js/chat.js
index 1344b6a..1b733b3 100644
--- a/static/js/chat.js
+++ b/static/js/chat.js
@@ -1,6 +1,6 @@
 // ---- 动态主题色 bootstrap(spec §3):?color= → 派生 → :root 变量 ----
 (function () {
-    if (typeof ChatTheme === "undefined") return; // theme.js 加载失败→style.css :root 默认橙兜底
+    if (typeof ChatTheme === "undefined") return; // theme.js 加载失败→style.css :root 品牌蓝兜底
     var m = /(?:^|[?&])color=([^&]*)/.exec(location.search);
     function safeDecode(s) { try { return decodeURIComponent(s); } catch (e) { return ""; } }
     var color = m ? safeDecode(m[1]).trim() : "";