diff --git a/app/api/routes/scrape.py b/app/api/routes/scrape.py
index b7c207a..e54fe48 100644
--- a/app/api/routes/scrape.py
+++ b/app/api/routes/scrape.py
@@ -176,9 +176,10 @@ async def order_get_shipping_fee(payload: OrderShippingFeeRequest) -> ApiRespons
     """计算订单运费与手续费。
 
     规则:
-      - 官方店铺(supplier 为空)运费: 按官方部分商品总额套阶梯价(440/385/0)
+      - 官方店铺(店铺标识为空)运费: 按官方部分商品总额套阶梯价(440/385/0)
         * 订单中无任何官方商品时,官方运费 0
-      - 加盟店运费(supplier 非空,同名视为同一家): 每家统一 800 日元
+      - 加盟店运费(店铺标识非空,同标识视为同一家): 每家统一 800 日元
+        * 店铺标识优先取 tenpo_cd(与 other_shop_list 中的 tenpo_cd 一致),未提供时回退取 supplier
       - 通贩手续费: 按全部商品(含官方+加盟店)总额套阶梯价(240/0)
     """
     official_amount = 0
@@ -187,10 +188,11 @@ async def order_get_shipping_fee(payload: OrderShippingFeeRequest) -> ApiRespons
     for item in payload.item_list:
         subtotal = item.goods_number * item.goods_price
         goods_amount += subtotal
-        if item.supplier == "":
+        shop_key = item.tenpo_cd or item.supplier
+        if shop_key == "":
             official_amount += subtotal
         else:
-            franchise_stores.add(item.supplier)
+            franchise_stores.add(shop_key)
 
     official_shipping_fee = get_shipping_fee(official_amount) if official_amount > 0 else 0
     franchise_shipping_fee = get_franchise_shipping_fee(len(franchise_stores))
diff --git a/app/models/scrape.py b/app/models/scrape.py
index e22b3a9..6f91260 100644
--- a/app/models/scrape.py
+++ b/app/models/scrape.py
@@ -42,6 +42,7 @@ class DetailRequest(BaseModel):
     product_url: HttpUrl | None = None
     tenpo_cd: str | None = None  # 指定店铺代码；跳转查看某个加盟店/市场店铺的报价时传入
     branch_number: str | None = None  # 指定分支编号，与 tenpo_cd 搭配使用
+    include_other_shops: bool = False  # 为 True 时，随详情额外抓取并返回 other_shop_list（多付出一次页面请求）
 
 
 class ProductSummary(BaseModel):
@@ -104,6 +105,7 @@ class ProductDetailData(BaseModel):
     sku_list: list[dict[str, Any]]  # 规格列表
     sku: str = ""  # 规格
     breadcrumb_list: list[dict[str, Any]] = []  # 面包屑
+    other_shop_list: list[OtherShopItem] = []  # 仅当请求 include_other_shops=True 时才会填充，否则为空列表
 
 
 class OtherShopListData(BaseModel):
@@ -126,6 +128,8 @@ class CargoItemRequest(BaseModel):
     id: str
     number: int = 1
     price_limit: int | None = None
+    tenpo_cd: str | None = None  # 指定店铺代码;跳转加入指定加盟店/市场店铺的商品时传入
+    branch_number: str | None = None  # 指定分支编号,与 tenpo_cd 搭配使用
 
 
 class CargoPayload(BaseModel):
@@ -160,6 +164,10 @@ class OrderItem(BaseModel):
     goods_price: int = Field(ge=0)
     # 店铺标识: 空串 = 官方店铺;非空 = 加盟店标识(同名视为同一家加盟店)
     supplier: str = ""
+    # 店铺代码,来自 other_shop_list 中的 tenpo_cd;非空 = 加盟店/市场店铺。
+    # 优先于 supplier 用于判定"同一家店铺"(同 tenpo_cd 视为同一家);未提供时回退使用 supplier。
+    tenpo_cd: str = ""
+    branch_number: str = ""  # 分支编号,可选,与 tenpo_cd 搭配使用
 
 
 class OrderShippingFeeRequest(BaseModel):
diff --git a/app/services/cargo_service.py b/app/services/cargo_service.py
index 31950ef..2a9ca63 100644
--- a/app/services/cargo_service.py
+++ b/app/services/cargo_service.py
@@ -91,7 +91,7 @@ class CargoService:
                         continue
 
                     logger.debug("进入商品 %s 详情页，准备购买数量: %s...", product_id, number)
-                    detail_url = product_detail_url(product_id)
+                    detail_url = product_detail_url(product_id, item.tenpo_cd, item.branch_number)
                     await page.goto(detail_url, wait_until="domcontentloaded", timeout=20000)
 
                     # 判断是否缺货
diff --git a/app/services/surugaya_client.py b/app/services/surugaya_client.py
index b5901f4..b270f7f 100644
--- a/app/services/surugaya_client.py
+++ b/app/services/surugaya_client.py
@@ -265,6 +265,11 @@ class SurugayaClient:
         # 提取面包屑
         breadcrumb_list = self.get_breadcrumb_list(tree)
 
+        # 仅当调用方显式要求时，才额外抓取「他のショップ」页面（多付出一次 Cloudflare 保护页面请求）
+        other_shop_list: list[OtherShopItem] = []
+        if payload.include_other_shops:
+            other_shop_list = await self._fetch_other_shop_list(goods_id)
+
         detail = ProductDetailData(
             goods_id=goods_id,
             goods_name=goods_name,
@@ -279,6 +284,7 @@ class SurugayaClient:
             price_note=price_note,
             shipping_comission_fee=shipping_comission_fee,
             breadcrumb_list=breadcrumb_list,
+            other_shop_list=other_shop_list,
         )
         logger.debug("详情页解析完成：goods_id=%s goods_name=%s ", detail.goods_id, detail.goods_name)
         return detail
diff --git a/tests/test_order_shipping_fee.py b/tests/test_order_shipping_fee.py
new file mode 100644
index 0000000..bc7d167
--- /dev/null
+++ b/tests/test_order_shipping_fee.py
@@ -0,0 +1,68 @@
+"""/api/order/get_shipping_fee 中"店铺标识"分桶逻辑的单元测试：
+
+- 店铺标识优先取 tenpo_cd(与 other_shop_list 一致)，未提供时回退取 supplier
+- 同 tenpo_cd(或同 supplier)视为同一家加盟店，只收一次 800 日元
+"""
+from __future__ import annotations
+
+import pytest
+
+from app.api.routes.scrape import order_get_shipping_fee
+from app.models.scrape import OrderItem, OrderShippingFeeRequest
+
+
+@pytest.mark.asyncio
+async def test_official_only_uses_official_ladder() -> None:
+    request = OrderShippingFeeRequest(item_list=[OrderItem(goods_id="1", goods_number=1, goods_price=800)])
+    resp = await order_get_shipping_fee(request)
+    assert resp.data.shipping_fee == 440
+    assert resp.data.goods_amount == 800
+
+
+@pytest.mark.asyncio
+async def test_tenpo_cd_groups_same_franchise_store_once() -> None:
+    request = OrderShippingFeeRequest(
+        item_list=[
+            OrderItem(goods_id="1", goods_number=1, goods_price=1000, tenpo_cd="400451"),
+            OrderItem(goods_id="2", goods_number=1, goods_price=2000, tenpo_cd="400451", branch_number="0003"),
+        ]
+    )
+    resp = await order_get_shipping_fee(request)
+    assert resp.data.shipping_fee == 800  # 同一 tenpo_cd 只收一次加盟店运费
+    assert resp.data.goods_amount == 3000
+
+
+@pytest.mark.asyncio
+async def test_different_tenpo_cd_charged_separately() -> None:
+    request = OrderShippingFeeRequest(
+        item_list=[
+            OrderItem(goods_id="1", goods_number=1, goods_price=1000, tenpo_cd="400451"),
+            OrderItem(goods_id="2", goods_number=1, goods_price=1000, tenpo_cd="400999"),
+        ]
+    )
+    resp = await order_get_shipping_fee(request)
+    assert resp.data.shipping_fee == 1600  # 两家不同加盟店各收 800
+
+
+@pytest.mark.asyncio
+async def test_tenpo_cd_takes_precedence_over_supplier() -> None:
+    request = OrderShippingFeeRequest(
+        item_list=[
+            OrderItem(goods_id="1", goods_number=1, goods_price=1000, supplier="山口大学前店", tenpo_cd="400451"),
+            OrderItem(goods_id="2", goods_number=1, goods_price=1000, supplier="其他名称", tenpo_cd="400451"),
+        ]
+    )
+    resp = await order_get_shipping_fee(request)
+    assert resp.data.shipping_fee == 800  # 尽管 supplier 文本不同，tenpo_cd 相同仍视为同一家
+
+
+@pytest.mark.asyncio
+async def test_falls_back_to_supplier_when_tenpo_cd_missing() -> None:
+    request = OrderShippingFeeRequest(
+        item_list=[
+            OrderItem(goods_id="1", goods_number=1, goods_price=1000, supplier="老加盟店"),
+            OrderItem(goods_id="2", goods_number=1, goods_price=1000, supplier="老加盟店"),
+        ]
+    )
+    resp = await order_get_shipping_fee(request)
+    assert resp.data.shipping_fee == 800  # 无 tenpo_cd 时按 supplier 分桶，保持向后兼容
diff --git a/tests/test_surugaya_client_shops.py b/tests/test_surugaya_client_shops.py
index f177de6..3fa1559 100644
--- a/tests/test_surugaya_client_shops.py
+++ b/tests/test_surugaya_client_shops.py
@@ -59,3 +59,53 @@ class TestFetchOtherShops:
         client = _make_client()
         with pytest.raises(Exception):
             await client.fetch_other_shops(DetailRequest(id=None))
+
+
+class TestFetchDetailIncludeOtherShops:
+    """DetailRequest.include_other_shops 控制 fetch_detail 是否顺带抓取 other_shop_list。"""
+
+    MINIMAL_DETAIL_HTML = '<html><body><h1 id="item_title">测试商品</h1></body></html>'
+
+    @pytest.mark.asyncio
+    async def test_flag_false_skips_other_shop_fetch(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        client = _make_client()
+        monkeypatch.setattr(client, "_session_manager", _FakeSessionManager(self.MINIMAL_DETAIL_HTML))
+
+        called = False
+
+        async def fake_fetch_other_shop_list(goods_id: str) -> list[OtherShopItem]:
+            nonlocal called
+            called = True
+            return []
+
+        monkeypatch.setattr(client, "_fetch_other_shop_list", fake_fetch_other_shop_list)
+
+        detail = await client.fetch_detail(DetailRequest(id="220035970"))
+
+        assert called is False
+        assert detail.other_shop_list == []
+
+    @pytest.mark.asyncio
+    async def test_flag_true_includes_other_shop_list(self, monkeypatch: pytest.MonkeyPatch) -> None:
+        client = _make_client()
+        monkeypatch.setattr(client, "_session_manager", _FakeSessionManager(self.MINIMAL_DETAIL_HTML))
+
+        fake_items = [OtherShopItem(tenpo_cd="400451", shop_name="駿河屋　山口大学前店", price=1370)]
+
+        async def fake_fetch_other_shop_list(goods_id: str) -> list[OtherShopItem]:
+            assert goods_id == "220035970"
+            return fake_items
+
+        monkeypatch.setattr(client, "_fetch_other_shop_list", fake_fetch_other_shop_list)
+
+        detail = await client.fetch_detail(DetailRequest(id="220035970", include_other_shops=True))
+
+        assert detail.other_shop_list == fake_items
+
+
+class _FakeSessionManager:
+    def __init__(self, html: str) -> None:
+        self._html = html
+
+    async def fetch_html(self, url: str):
+        return self._html, None