diff --git a/app/api/v1/meituan.py b/app/api/v1/meituan.py
index 4d56b73..7e3e2bc 100644
--- a/app/api/v1/meituan.py
+++ b/app/api/v1/meituan.py
@@ -9,6 +9,7 @@ from concurrent.futures import ThreadPoolExecutor, as_completed
 
 from fastapi import APIRouter, HTTPException
 
+from app.core.config import settings
 from app.integrations.meituan import MeituanCpsError, get_referral_link, query_coupon
 from app.schemas.meituan import (
     CouponCard,
@@ -27,6 +28,8 @@ router = APIRouter(prefix="/api/v1/meituan", tags=["meituan-cps"])
 
 @router.post("/coupons", response_model=CouponListResponse, summary="券列表(为您推荐)")
 def list_coupons(req: CouponListRequest) -> CouponListResponse:
+    if not settings.mt_cps_configured:
+        return CouponListResponse(items=[], has_next=False, search_id=None)
     logger.info("[coupons] lon=%.6f lat=%.6f topic=%s", req.longitude, req.latitude, req.list_topic_id)
     try:
         raw = query_coupon(
@@ -78,6 +81,8 @@ def _interleave(waimai: list[dict], daodian: list[dict]) -> list[CouponCard]:
 
 @router.post("/feed", response_model=FeedResponse, summary="混合feed(外卖+到店交叉, 无限流)")
 def feed(req: FeedRequest) -> FeedResponse:
+    if not settings.mt_cps_configured:
+        return FeedResponse(items=[], has_next=False, page=req.page)
     page_idx = req.page - 1
     lon, lat = req.longitude, req.latitude
     logger.info("[feed] page=%s lon=%.6f lat=%.6f", req.page, lon, lat)
@@ -108,6 +113,8 @@ def feed(req: FeedRequest) -> FeedResponse:
 
 @router.post("/referral-link", response_model=ReferralLinkResponse, summary="换取推广链接(点抢时调)")
 def referral_link(req: ReferralLinkRequest) -> ReferralLinkResponse:
+    if not settings.mt_cps_configured:
+        return ReferralLinkResponse(link="", link_map={})
     try:
         raw = get_referral_link(
             product_view_sign=req.product_view_sign,
diff --git a/app/core/config.py b/app/core/config.py
index 24b049e..59d2b96 100644
--- a/app/core/config.py
+++ b/app/core/config.py
@@ -53,11 +53,18 @@ class Settings(BaseSettings):
     SMS_SEND_INTERVAL_SEC: int = 60
 
     # ===== 美团联盟 CPS =====
+    # 未配置时所有 /api/v1/meituan/* 接口 200 返空(优雅降级),不影响登录/领券等其他业务。
     MT_CPS_APP_KEY: str = ""
     MT_CPS_APP_SECRET: str = ""
     MT_CPS_HOST: str = "https://media.meituan.com"
     MT_CPS_TIMEOUT_SEC: int = 15
     MT_CPS_DEFAULT_SID: str = "sgbjia"
+
+    @property
+    def mt_cps_configured(self) -> bool:
+        """美团 CPS 凭证齐全(缺则接口返空,而非 502)。"""
+        return bool(self.MT_CPS_APP_KEY and self.MT_CPS_APP_SECRET)
+
     # ===== 微信支付(商家转账到零钱 / 提现)=====
     # 真实凭证放 .env(已 gitignore),证书 .pem 放 secrets/。WECHAT_APP_ID 同时用于
     # 微信登录(code 换 openid)与转账,必须与 App 端开放平台 appid 一致。