diff --git a/flows/shared/mappers.py b/flows/shared/mappers.py
index 0ef2e60..ec700d4 100644
--- a/flows/shared/mappers.py
+++ b/flows/shared/mappers.py
@@ -5,6 +5,7 @@
 
 from __future__ import annotations
 
+import re
 from datetime import datetime, timedelta, timezone
 from typing import Any
 
@@ -238,6 +239,7 @@ def map_riin_order(raw: Any) -> OrderUpsertInput:
 def map_riin_goods(raw: Any, parent_order_no: str, parent_created_at: datetime) -> GoodsUpsertInput:
     product_code = raw.product_code
     item_name = product_code.split("-")[0] if product_code else None
+    style_no = raw.style_code or item_name
     return GoodsUpsertInput(
         orderNo=parent_order_no,
         productionNo=raw.id,
@@ -246,7 +248,7 @@ def map_riin_goods(raw: Any, parent_order_no: str, parent_created_at: datetime)
         itemName=item_name,
         itemColor=raw.color_code,
         itemSize=raw.size_code,
-        itemStyleNo=item_name,
+        itemStyleNo=style_no,
         quantity=raw.num if raw.num is not None else 1,
         status=RIIN_GOODS_STATUS_MAP.get(raw.goods_status) if raw.goods_status else None,
     )
@@ -335,17 +337,19 @@ def map_sds_order(raw: Any, channel_type_map: dict[int, str | None], pre_courier
     )
 
 
+_STYLE_CODE_RE = re.compile(r"[A-Za-z]{1,6}\d{2,4}[A-Za-z]{0,2}|\d{2,6}[A-Za-z]{1,2}")
+
+
 def _parse_sds_style_no(name: str | None) -> str | None:
+    """从商品名提取款号,如 '英国（包邮）180g纯棉T恤-GBTM001-单面印花' → 'GBTM001';
+    裸码名(如 'DF009')直接返回本身。逐 '-' 段扫描,避免误中段外字符。"""
     if not name:
         return None
-    parts = name.split("（）")
-    if len(parts) < 3:
-        return None
-    subs = parts[2].split("-")
-    if len(subs) == 2:
-        return subs[0] or None
-    if len(subs) >= 3:
-        return subs[1] or None
+    for seg in name.split("-"):
+        seg = seg.strip()
+        m = _STYLE_CODE_RE.fullmatch(seg)
+        if m:
+            return seg.upper()
     return None