diff --git a/backend/app/routers/auth.py b/backend/app/routers/auth.py
index 5dee083..849862f 100644
--- a/backend/app/routers/auth.py
+++ b/backend/app/routers/auth.py
@@ -108,40 +108,46 @@ class OpenidRequest(BaseModel):
 
 @router.post("/openid-login")
 async def openid_login(req: OpenidRequest) -> TokenResponse:
-    """仅传 openid → 调 CRMEB 获取用户信息 → 创建/更新 User → 返回 token"""
+    """仅传 openid → 调 CRMEB 获取用户信息（查不到也降级建档）→ 创建/更新 User → 返回 token"""
     if not settings.crmeb_base_url or not settings.crmeb_api_key:
         raise HTTPException(status_code=500, detail="CRMEB 未配置")
 
-    async with httpx.AsyncClient() as client:
-        resp = await client.get(
-            f"{settings.crmeb_base_url}/api/internal/user-info",
-            params={"openid": req.openid},
-            headers={"X-Internal-Key": settings.crmeb_api_key},
-            timeout=10,
-        )
-        data = resp.json()
-
-    if data.get("code") != 200:
-        raise HTTPException(status_code=400, detail="获取用户信息失败")
-
-    info = data["data"]
+    # 尝试从 CRMEB 拉取用户资料；失败（新用户/网络）时降级为匿名建档，openid 即身份
+    nickname, phone, avatar = "", "", ""
+    try:
+        async with httpx.AsyncClient() as client:
+            resp = await client.get(
+                f"{settings.crmeb_base_url}/api/internal/user-info",
+                params={"openid": req.openid},
+                headers={"X-Internal-Key": settings.crmeb_api_key},
+                timeout=10,
+            )
+            data = resp.json()
+        if data.get("code") == 200:
+            info = data.get("data") or {}
+            nickname = (info.get("nickname") or "").strip()
+            phone = (info.get("phone") or "").strip()
+            avatar = (info.get("avatar") or "").strip()
+    except Exception:
+        pass  # CRMEB 不可用时仍允许 openid 建档
 
     # 查找或创建用户
     user = await User.find_one(User.openid == req.openid)
     if not user:
         user = User(
             openid=req.openid,
-            name=info.get("nickname", "") or "",
-            phone=info.get("phone") or None,
-            avatar_url=info.get("avatar") or None,
+            name=nickname,
+            phone=phone or None,
+            avatar_url=avatar or None,
         )
         await user.insert()
     else:
-        user.name = info.get("nickname", "") or user.name
-        if info.get("phone"):
-            user.phone = info["phone"]
-        if info.get("avatar"):
-            user.avatar_url = info["avatar"]
+        if nickname:
+            user.name = nickname
+        if phone:
+            user.phone = phone
+        if avatar:
+            user.avatar_url = avatar
         await user.save()
 
     token = _build_token(user)
diff --git a/frontend/src/app/pages/ProfilePage.tsx b/frontend/src/app/pages/ProfilePage.tsx
index f475f4b..9b8f81d 100644
--- a/frontend/src/app/pages/ProfilePage.tsx
+++ b/frontend/src/app/pages/ProfilePage.tsx
@@ -24,6 +24,7 @@ import { Button } from "../components/ui/button";
 import { Card } from "../components/ui/card";
 import { Badge } from "../components/ui/badge";
 import { useUser, getPregnancyStage } from "../context/UserContext";
+import bridge from "../services/bridge";
 
 interface UserInfo {
   name: string;
@@ -287,6 +288,22 @@ export function ProfilePage() {
               </div>
             </div>
           </Card>
+
+          {/* 微信授权登录：未绑定手机号时显示，点击跳小程序登录页完善资料 */}
+          {!user.phone && (
+            <div className="mt-4">
+              <button
+                onClick={() => bridge.requireAuth()}
+                className="w-full py-3 rounded-2xl bg-white border border-morandi-200 text-morandi-500 text-sm font-medium flex items-center justify-center gap-2 shadow-sm hover:bg-morandi-50"
+              >
+                <Shield className="w-4 h-4" />
+                微信授权登录 · 完善资料
+              </button>
+              <p className="text-center text-xs text-gray-400 mt-2">
+                绑定手机号后可同步头像昵称，数据不丢失
+              </p>
+            </div>
+          )}
         </motion.div>
 
         {/* 基本信息 */}