diff --git a/jituan/services/admin_context.py b/jituan/services/admin_context.py
index 077be20..b8e7b34 100644
--- a/jituan/services/admin_context.py
+++ b/jituan/services/admin_context.py
@@ -43,7 +43,7 @@ def resolve_admin_effective_club(user, request):
         return requested_club, requested_scope, None
 
     ctx = build_admin_club_context(user)
-    allowed = get_allowed_club_ids(user)
+    allowed = get_switchable_club_ids(user)
 
     if requested_scope == DATA_SCOPE_ALL:
         if not ctx.get('is_group_admin'):
@@ -94,13 +94,16 @@ def build_admin_club_context(user):
         )
 
     if not assignments:
+        switchable = get_switchable_club_ids(user)
+        visible_clubs = [c for c in all_clubs if c['club_id'] in switchable]
+        club_id = next(iter(switchable), CLUB_ID_DEFAULT) if switchable else CLUB_ID_DEFAULT
         return _pack(
             scope=DATA_SCOPE_SINGLE,
-            club_id=CLUB_ID_DEFAULT,
+            club_id=club_id,
             is_group_admin=False,
             assignments=[],
-            clubs=all_clubs,
-            can_switch_club=False,
+            clubs=visible_clubs,
+            can_switch_club=len(visible_clubs) > 1,
             role_code='CLUB_ADMIN',
             role_name='子公司客服（默认）',
         )
@@ -110,18 +113,22 @@ def build_admin_club_context(user):
         a.club_id is None or a.data_scope == DATA_SCOPE_ALL
         for a in assignments
     )
-    allowed_club_ids = {a.club_id for a in assignments if a.club_id}
+    switchable_ids = get_switchable_club_ids(user)
 
     if has_group:
         scope = DATA_SCOPE_ALL
         club_id = CLUB_ID_DEFAULT
+        visible_clubs = all_clubs
     else:
         scope = DATA_SCOPE_SINGLE
-        club_id = primary.club_id or CLUB_ID_DEFAULT
-
-    visible_clubs = all_clubs if has_group else [
-        c for c in all_clubs if c['club_id'] in allowed_club_ids
-    ]
+        primary_cid = primary.club_id or CLUB_ID_DEFAULT
+        if primary_cid in switchable_ids:
+            club_id = primary_cid
+        elif switchable_ids:
+            club_id = sorted(switchable_ids)[0]
+        else:
+            club_id = primary_cid
+        visible_clubs = [c for c in all_clubs if c['club_id'] in switchable_ids]
 
     role_code = primary.role_code or 'CLUB_ADMIN'
     return _pack(
@@ -171,6 +178,47 @@ def can_manage_admin_assignments(user, permissions=None):
     )
 
 
+def get_switchable_club_ids(user):
+    """
+    顶栏可切换俱乐部：须已分配该俱乐部，且在该俱乐部下至少有一个功能角色。
+    无角色则不可切换，避免切过去后菜单空白却误显全部页面。
+    """
+    from gvsdsdk.models import UserRole
+    from jituan.services.club_rbac import filter_role_uuids_for_club_scope
+    from jituan.constants import DATA_SCOPE_SINGLE
+
+    if is_system_super_admin(user):
+        return {c.club_id for c in Club.query.filter(status=1)}
+
+    assignments = AdminAssignment.query.filter(yonghuid=user.UserUID, status=1)
+    has_group = (
+        assignments.filter(club_id__isnull=True).exists()
+        or assignments.filter(data_scope=DATA_SCOPE_ALL).exists()
+    )
+    if has_group:
+        return {c.club_id for c in Club.query.filter(status=1)}
+
+    allowed = get_allowed_club_ids(user)
+    if not allowed:
+        cid = (getattr(user, 'ClubID', None) or '').strip()
+        if cid:
+            allowed = {cid}
+
+    role_uuids = list(
+        UserRole.objects.filter(UserUUID=user.UserUUID).values_list('RoleUUID', flat=True)
+    )
+    if not allowed or not role_uuids:
+        return set()
+
+    switchable = set()
+    for cid in allowed:
+        if filter_role_uuids_for_club_scope(
+            role_uuids, cid, DATA_SCOPE_SINGLE, list(allowed),
+        ):
+            switchable.add(cid)
+    return switchable
+
+
 def can_manage_roles_for_club(user, permissions, club_id):
     """
     是否可为指定俱乐部分配/移除功能角色。