diff --git a/core/weibo/client.py b/core/weibo/client.py
index d652736..77d90bf 100644
--- a/core/weibo/client.py
+++ b/core/weibo/client.py
@@ -15,6 +15,7 @@ import json
 import secrets
 import time
 from dataclasses import dataclass
+from html import unescape
 from html.parser import HTMLParser
 from typing import Any
 from urllib.parse import parse_qs, urljoin, urlsplit
@@ -321,6 +322,7 @@ class WeiboClient:
         data: dict[str, Any] | None = None,
         json: dict[str, Any] | None = None,
     ) -> dict[str, Any]:
+        response: requests.Response | None = None
         try:
             response = self.session.request(
                 method,
@@ -333,10 +335,18 @@ class WeiboClient:
             )
             response.raise_for_status()
             payload = response.json()
+        except (requests.exceptions.JSONDecodeError, ValueError) as exc:
+            text = unescape(response.text if response is not None else "")
+            if "retcode=6102" in text or "/sso/login.php" in text:
+                raise WeiboAuthError(
+                    "微博支付/活动域登录态已失效（retcode=6102），"
+                    "请重新登录微博后重新导入 CK"
+                ) from exc
+            path = urlsplit(response.url).path if response is not None else ""
+            suffix = f": {path}" if path else ""
+            raise WeiboTransportError(f"微博接口返回非 JSON{suffix}") from exc
         except requests.RequestException as exc:
             raise WeiboTransportError(f"请求微博失败: {exc}") from exc
-        except ValueError as exc:
-            raise WeiboTransportError("微博返回内容不是合法 JSON") from exc
         if not isinstance(payload, dict):
             raise WeiboTransportError("微博返回 JSON 结构异常")
         return payload
diff --git a/docs/微博/微博微豆-CK接口与兑换链路确认-2026-11-07.md b/docs/微博/微博微豆-CK接口与兑换链路确认-2026-11-07.md
index 1764ae9..b47051e 100644
--- a/docs/微博/微博微豆-CK接口与兑换链路确认-2026-11-07.md
+++ b/docs/微博/微博微豆-CK接口与兑换链路确认-2026-11-07.md
@@ -8,6 +8,7 @@ generated:
 status: stable
 verified:
   - { by: ai/codex, at: 2026-11-07T19:03:41+08:00 }
+  - { by: ai/codex, at: 2026-11-08T13:45:00+08:00 }
 ---
 
 # 微博微豆 CK 接口与兑换链路确认
@@ -723,6 +724,37 @@ data.totalCount
 | `400000` | `user not login`，CK 无效 |
 | 其他 | 保留服务端 `msg` 和 `trace_id`，不要盲目重试状态变更接口 |
 
+### 10.1 登录页 HTML 与 `retcode=6102`
+
+部分 V+ / 支付域接口在登录态失效时仍返回 HTTP 200，但 `Content-Type` 为 `text/html`，正文是“新浪通行证”跳转页，并包含：
+
+```text
+retcode=6102
+```
+
+2026-11-08 实测到同一账号可以正常请求：
+
+```text
+GET https://vipclub.e.weibo.com/aj/mall/home
+-> code=100000
+```
+
+但后续请求：
+
+```text
+GET https://vipclub.weibo.com/aj/vmember/gfsupport
+GET https://vipclub.weibo.com/aj/paycomponent/userinfo
+-> text/html + retcode=6102
+```
+
+这说明 CK 已经不能访问 V+ 支付/活动域，不能归类为普通“非 JSON 查询失败”。处理约定：
+
+- `retcode=6102` 或跳转 `/sso/login.php` 归类为 `WeiboAuthError`。
+- 账号 `ck_check_status` 写为 `invalid`，UI 显示「失效」。
+- 提示用户重新登录微博，并在 V+ 页面可用后重新导出、导入完整 CK。
+- 不要通过反复刷新、重试支付接口来“恢复”状态。
+- 其他未知 HTML 或网关错误保留为 `error`，UI 显示「查询失败」，不要误标成 CK 失效。
+
 ## 11. 尚未确认
 
 - 是否只需要 `SUB`，还是必须完整 Cookie Jar。
diff --git a/tests/test_weibo_accounts.py b/tests/test_weibo_accounts.py
index 05b2c92..0f8a191 100644
--- a/tests/test_weibo_accounts.py
+++ b/tests/test_weibo_accounts.py
@@ -205,6 +205,22 @@ def test_refresh_marks_payment_access_failure(db, current_user):
     assert "触发微博账号风控" in account.ck_check_message
 
 
+def test_refresh_marks_payment_login_expiry_as_invalid(db, current_user):
+    account_out = import_cookies(
+        WeiboCookieImport(text="SCF=a; SUB=b", tag=""),
+        db=db,
+        current=current_user,
+    ).accounts[0]
+    account = db.query(WeiboAccount).filter(WeiboAccount.id == account_out.id).one()
+    StubWeiboClient.payment_error = WeiboAuthError("支付域 retcode=6102")
+
+    with pytest.raises(WeiboAuthError, match="6102"):
+        weibo_service.refresh_weibo_account(db, account)
+
+    assert account.ck_check_status == "invalid"
+    assert "6102" in account.ck_check_message
+
+
 def test_list_accounts_returns_parallel_page_shape(db, current_user):
     assert (
         import_cookies(
diff --git a/tests/test_weibo_client.py b/tests/test_weibo_client.py
index 3ce5ed5..5392d8b 100644
--- a/tests/test_weibo_client.py
+++ b/tests/test_weibo_client.py
@@ -17,6 +17,7 @@ from core.weibo import (
     WeiboExchangeUncertainError,
     WeiboHomeSnapshot,
     WeiboRechargeError,
+    WeiboTransportError,
     extract_bind_raw_url,
     normalize_weibo_cookie,
 )
@@ -50,7 +51,7 @@ class FakeResponse:
 
     def json(self):
         if not isinstance(self.payload, dict):
-            raise TypeError("not json")
+            raise requests.exceptions.JSONDecodeError("not json", self.text, 0)
         return self.payload
 
 
@@ -155,6 +156,30 @@ def test_fetch_home_keeps_trace_id_for_other_api_error():
         client.fetch_home()
 
 
+def test_fetch_home_treats_sina_login_redirect_as_auth_error():
+    session = FakeSession(
+        [
+            (
+                "<html><head><meta http-equiv='refresh' "
+                "content=\"0; url='https://vipclub.weibo.com/aj/vmember/"
+                "gfsupport?retcode=6102'\"></head></html>"
+            )
+        ]
+    )
+    client = WeiboClient("SUB=expired", session=session)
+
+    with pytest.raises(WeiboAuthError, match="重新登录微博"):
+        client.fetch_home()
+
+
+def test_fetch_home_reports_non_json_endpoint_path():
+    session = FakeSession(["<html><body>gateway error</body></html>"])
+    client = WeiboClient("SUB=test", session=session)
+
+    with pytest.raises(WeiboTransportError, match="/aj/mall/home"):
+        client.fetch_home()
+
+
 def test_generate_bind_scheme_posts_account_type_without_weibo_cookie():
     session = FakeSession(
         [