diff --git a/cmcc/scrip_cmcc_mark.py b/cmcc/scrip_cmcc_mark.py
index f88459a..24a3c44 100644
--- a/cmcc/scrip_cmcc_mark.py
+++ b/cmcc/scrip_cmcc_mark.py
@@ -172,7 +172,17 @@ def send_notify(title, content):
             r = requests.post(hook, data=body.encode("utf-8"), headers=hdrs, timeout=15)
             ok = 200 <= r.status_code < 300
             sent = sent or ok
-            log("[通知] webhook HTTP %d %s" % (r.status_code, "成功" if ok else "失败"))
+            if ok:
+                log("[通知] webhook HTTP %d 成功" % r.status_code)
+            else:
+                # ★ 400/401 必须看到服务端说了什么，否则永远不知道为什么推不出去
+                log("[通知] webhook HTTP %d 失败 | 请求体前80=%r | 响应=%r" % (
+                    r.status_code, body[:80], (r.text or "")[:300]))
+                if r.status_code in (401, 403):
+                    log("[通知] 提示：webhook 需要鉴权头，检查 WEBHOOK_HEADERS 里有没有 Token/Authorization 行")
+                elif r.status_code == 400:
+                    log("[通知] 提示：服务端嫌请求体不合法。核对 WEBHOOK_CONTENT_TYPE 与 WEBHOOK_BODY 模板是否自相矛盾"
+                        "（JSON 内容必须配 application/json）")
         except Exception as e:
             log("[通知] webhook 异常 %r" % e)
     if token: