diff --git a/docs/IM-前后端对接文档.md b/docs/IM-前后端对接文档.md
index a81ce55..03067ba 100644
--- a/docs/IM-前后端对接文档.md
+++ b/docs/IM-前后端对接文档.md
@@ -328,7 +328,7 @@ X-MeetingIM-APIKey: <预置的普通 API Key>
 
 ##### 0.5.4.3.1 会话内系统提示和可点击动作消息
 
-截图中的灰色提示、入群邀请说明、好友已添加提示等属于会话内系统消息，必须进入对应 P2P 或群 Topic 的消息流，占用 `seq`，参与历史拉取、重连补偿和多端同步。它们不是 `info` 实时业务事件，也不是系统通知列表记录；`info` 只负责触发刷新，真正需要在聊天窗口长期展示的内容必须以 `{data}` 下发并入库。
+截图中的灰色提示、群内邀请确认说明、好友已添加提示等属于会话内系统消息，必须进入对应 P2P 或群 Topic 的消息流，占用 `seq`，参与历史拉取、重连补偿和多端同步。它们不是 `info` 实时业务事件，也不是系统通知列表记录；`info` 只负责触发刷新，真正需要在聊天窗口长期展示的内容必须以 `{data}` 下发并入库。发给被邀请人的“加入群聊”邀请卡片不写入邀请人与被邀请人的 P2P 会话，展示以 `GET /v1/im/system-notifications` 返回的系统通知记录为准。
 
 客户端不得主动发送 `system_notice`、`system_action`；这两类消息只能由服务端受控身份生成。服务端下发时 `data.from` 可以为空，客户端以 `head.x-im-from="system"` 判断系统身份，不依赖真实用户头像。客户端收到未知 `template` 或未知 `action.type` 时，展示 `content.text`，忽略不可识别动作，不允许执行任意 URL、脚本或非白名单路由。
 
@@ -1607,7 +1607,7 @@ X-MeetingIM-APIKey: <预置的普通 API Key>
 
 **状态：新增邀请卡片和加入接口。**
 
-- 邀请卡展示以群邀请接口返回和系统通知记录为准；相关实时刷新使用 `info.what="group"` 群业务事件。
+- 邀请卡展示以群邀请接口返回和系统通知记录为准；系统通知 `event_type=group.invitation.created`，`action.type=group_invitation_accept`，`action.invitation_id` 用于点击加入，`action.topic` 为目标群。相关实时刷新使用 `info.what="group"` 群业务事件。
 - 点击加入：`POST /v1/im/group-invitations/{invitation_id}/accept`，带幂等键；返回 `status=joined|pending_approval` 和 `topic`。
 - 服务端校验邀请租户、有效期、群状态、成员资格和成员数上限；重复加入返回当前状态，过期返回 `INVITATION_EXPIRED`。
 
diff --git a/server/im_http.go b/server/im_http.go
index 46753e1..fd4021d 100644
--- a/server/im_http.go
+++ b/server/im_http.go
@@ -5381,13 +5381,7 @@ func serveIMGroupInvitations(wrt http.ResponseWriter, req *http.Request, topic s
 		if inv.JoinRequestID != "" {
 			item["join_request_id"] = inv.JoinRequestID
 		}
-		if imReliableHTTPEventsEnabled(req) {
-			publishIMConversationSystemNotice(principal.TenantID, principal.Uid.P2PName(uid),
-				"system_action", "group_invitation_created", "邀请你加入群聊。",
-				[]imSystemMessageActor{{UserID: principal.Uid.UserId(), Click: map[string]any{"type": "user_profile", "target_id": principal.Uid.UserId()}}},
-				[]imSystemMessageAction{{Type: "group_invitation_accept", Label: "立即加入", TargetID: inv.InvitationID}},
-				map[string]any{"invitation_id": inv.InvitationID, "topic": topic, "message": inv.Message})
-		}
+		publishIMGroupInvitationNotification(principal.TenantID, inv)
 		results = append(results, item)
 	}
 	dispatchIMGroupEvents(principal.TenantID)
@@ -11032,6 +11026,26 @@ func broadcastIMConversationSystemMessage(tenantID types.TenantID, msg *types.Me
 	broadcastHTTPForwardPresence(tenantID, msg, timestamp)
 }
 
+func publishIMGroupInvitationNotification(tenantID types.TenantID, inv *types.GroupInvitation) {
+	if tenantID == types.ZeroTenantID || inv == nil || inv.TargetUserID.IsZero() || store.Security == nil {
+		return
+	}
+	eventID := stableIMEventID("group-invitation", inv.InvitationID, inv.TargetUserID.UserId(), "created")
+	action := types.KVMap{
+		"type":          "group_invitation_accept",
+		"invitation_id": inv.InvitationID,
+		"topic":         inv.Topic,
+		"inviter_id":    inv.InviterUserID.UserId(),
+	}
+	if inv.Message != "" {
+		action["message"] = inv.Message
+	}
+	if err := createIMSystemNotification(tenantID, inv.TargetUserID, eventID, "group.invitation.created",
+		"群聊邀请", "邀请你加入群聊。", action); err != nil {
+		logs.Warn.Printf("group invitation: create notification invitation=%s target=%s: %v", inv.InvitationID, inv.TargetUserID.UserId(), err)
+	}
+}
+
 func deliverIMConversationSystemMessageToP2PSessions(tenantID types.TenantID, msg *types.Message, out *ServerComMessage) {
 	if globals.sessionStore == nil || msg == nil || out == nil || out.Data == nil {
 		return
diff --git a/server/im_http_test.go b/server/im_http_test.go
index ecdb42a..ee350b7 100644
--- a/server/im_http_test.go
+++ b/server/im_http_test.go
@@ -312,6 +312,7 @@ type testMailboxStore struct {
 
 type testUserSecurityStore struct {
 	unreadByPrefix map[string]int
+	notifications  []types.SystemNotification
 }
 
 type testProfilesStore struct {
@@ -1003,7 +1004,10 @@ func (s *testUserSecurityStore) SetYouthMode(_ types.TenantID, uid types.Uid, en
 	return &types.YouthModeSettings{UserID: uid, Enabled: enabled, PolicyVersion: policyVersion, UpdatedAt: now}, nil
 }
 
-func (s *testUserSecurityStore) CreateSystemNotification(_ types.TenantID, _ *types.SystemNotification) error {
+func (s *testUserSecurityStore) CreateSystemNotification(_ types.TenantID, notification *types.SystemNotification) error {
+	if notification != nil {
+		s.notifications = append(s.notifications, *notification)
+	}
 	return nil
 }
 
@@ -4704,13 +4708,17 @@ func TestServeIMGroupInvitationAddsNonMember(t *testing.T) {
 	mockStore.EXPECT().GetUidString().Return("test")
 	oldSubs := store.Subs
 	oldGroupBusiness := store.GroupBusiness
+	oldSecurity := store.Security
 	subs := mock_store.NewMockSubsPersistenceInterface(ctrl)
 	groupStore := &testGroupBusinessStore{}
+	securityStore := &testUserSecurityStore{}
 	store.Subs = subs
 	store.GroupBusiness = groupStore
+	store.Security = securityStore
 	defer func() {
 		store.Subs = oldSubs
 		store.GroupBusiness = oldGroupBusiness
+		store.Security = oldSecurity
 	}()
 	owner := types.Uid(42)
 	target := types.Uid(43)
@@ -4737,6 +4745,16 @@ func TestServeIMGroupInvitationAddsNonMember(t *testing.T) {
 	if len(groupStore.invitations) != 1 || groupStore.invitations[0].TargetUserID != target || groupStore.invitations[0].InvitationID != "ginv_test" {
 		t.Fatalf("invitation was not persisted: %#v", groupStore.invitations)
 	}
+	if len(securityStore.notifications) != 1 {
+		t.Fatalf("expected one target notification, got %#v", securityStore.notifications)
+	}
+	notification := securityStore.notifications[0]
+	if notification.UserID != target || notification.EventType != "group.invitation.created" {
+		t.Fatalf("unexpected notification target/type: %#v", notification)
+	}
+	if notification.Action["type"] != "group_invitation_accept" || notification.Action["invitation_id"] != "ginv_test" || notification.Action["topic"] != "grpAlpha" {
+		t.Fatalf("unexpected notification action: %#v", notification.Action)
+	}
 }
 
 func TestServeIMGroupInvitationCreatesApprovalRequest(t *testing.T) {