diff --git a/inbound_verify/sites/yunda.py b/inbound_verify/sites/yunda.py
index 1e912d0..7c961da 100644
--- a/inbound_verify/sites/yunda.py
+++ b/inbound_verify/sites/yunda.py
@@ -172,6 +172,37 @@ def _resolve_export_frame(ws_frame):
     return ws_frame.frame_locator('iframe[name="myFrame"]')
 
 
+def _resolve_business_frame(page, probe_selector, label):
+    """定位当前「可见」的业务 iframe（返回 Frame，用法与 FrameLocator 兼容）。
+
+    韵达门户每次切换菜单都会保留历史隐藏 iframe（display:none），因此不能按
+    `section iframe` 全量匹配（会命中多个，strict mode 报错）。这里遍历
+    page.frames，取「可见」且「包含指定控件」的 frame；probe_selector 需是
+    目标页面独有的控件：应到=#startTime，实到=#startDate，导出服务=.datagrid-view2。
+    """
+    print(f">> 正在定位业务 iframe（{label}）...")
+    deadline = time.monotonic() + 20
+    last_err = None
+    while time.monotonic() < deadline:
+        for frame in page.frames:
+            if frame is page.main_frame:
+                continue
+            try:
+                if not frame.frame_element().is_visible():
+                    continue
+            except Exception as e:
+                last_err = e
+                continue
+            try:
+                if frame.locator(probe_selector).count() > 0:
+                    print(f"   ✅ 已定位业务 iframe（{label}）: {frame.url[:100]}")
+                    return frame
+            except Exception as e:
+                last_err = e
+        page.wait_for_timeout(500)
+    raise RuntimeError(f"未定位到可见业务 iframe（{label}）: {last_err}")
+
+
 def yunda_login(page):
     """韵达自动登录：未登录则填充表单并提交，已登录则跳过。"""
     print(">> 正在检查韵达登录状态...")
@@ -270,7 +301,7 @@ def yunda_expected_download_impl(page, force=False, date=None):
         yunda_smart_menu_click(page, ["运营管理", "进站管理", "进站交接单查询"])
 
         print(">> 正在定位【进站交接单查询】iframe...")
-        ws_frame = page.frame_locator("section iframe")
+        ws_frame = _resolve_business_frame(page, "#startTime", "进站交接单查询")
 
         ws_frame.locator("#startTime").wait_for(state="attached", timeout=15000)
         print("✅ 进站交接单查询页面就绪")
@@ -527,7 +558,7 @@ def yunda_actual_download_impl(page, date=None):
         yunda_smart_menu_click(page, ["报表管理", "扫描记录查询"])
 
         print(">> 正在定位【扫描记录查询】iframe...")
-        ws_frame = page.frame_locator("section iframe")
+        ws_frame = _resolve_business_frame(page, "#startDate", "扫描记录查询")
 
         ws_frame.locator(
             ".no-records-found", has_text="没有找到匹配的记录"
@@ -714,7 +745,7 @@ def _yunda_poll_and_download_tasks(page, export_times, download_dir, final_filen
     print("\n>> 正在前往【导出服务】界面...")
     yunda_smart_menu_click(page, ["基础数据", "导出服务"])
 
-    export_ws_frame = page.frame_locator("section iframe")
+    export_ws_frame = _resolve_business_frame(page, ".datagrid-view2", "导出服务")
 
     export_ws_frame.get_by_role("cell", name="模块名称", exact=True).wait_for(
         state="visible", timeout=15000