diff --git a/internal/projectinstance/duty_action.go b/internal/projectinstance/duty_action.go
index d6311d33..94b3d9b7 100644
--- a/internal/projectinstance/duty_action.go
+++ b/internal/projectinstance/duty_action.go
@@ -63,7 +63,8 @@ func classifyAccess(dt DocTaskPlan, action string, userID int64, isCreator bool,
 	if !dt.Enabled {
 		return DocAccessDecision{Allowed: false, Code: AccessCodeDocTaskDisabled, Message: "该文档已被创建者禁用"}
 	}
-	switch classifyDocDuty(dt.Duties) {
+	mode, effective, _ := ResolveDocTaskDuty(dt)
+	switch mode {
 	case DutyModeNone:
 		switch action {
 		case DocAccessActionRun, DocAccessActionEdit:
@@ -90,7 +91,7 @@ func classifyAccess(dt DocTaskPlan, action string, userID int64, isCreator bool,
 		}
 	case DutyModeFull:
 		role := requiredDutyRole(action)
-		if userHoldsDuty(dt.Duties, userID, role) {
+		if userHoldsDuty(effective, userID, role) {
 			return allow
 		}
 		return DocAccessDecision{
diff --git a/internal/projectinstance/gate.go b/internal/projectinstance/gate.go
index a9de4029..fdf3c91a 100644
--- a/internal/projectinstance/gate.go
+++ b/internal/projectinstance/gate.go
@@ -25,7 +25,8 @@ func evaluateStageReadiness(
 			continue
 		}
 		td, hasDef := taskDefMap[dt.TaskKey]
-		approvalManaged := classifyDocDuty(dt.Duties) != DutyModeNone
+		mode, _, _ := ResolveDocTaskDuty(dt)
+		approvalManaged := mode != DutyModeNone
 		required := approvalManaged && (!hasDef || td.BlocksWhenEnabled())
 		state := docStates[dt.TaskKey]
 		if state == "" {
diff --git a/internal/projectinstance/stage_access.go b/internal/projectinstance/stage_access.go
index cea85491..47ca72e3 100644
--- a/internal/projectinstance/stage_access.go
+++ b/internal/projectinstance/stage_access.go
@@ -83,7 +83,7 @@ func (s *Service) ResolveStageAccess(ctx context.Context, projectID int64, userI
 			if !dt.Enabled {
 				continue
 			}
-			if docTaskDutyForUser(dt, userID) || (isCreator && classifyDocDuty(dt.Duties) == DutyModeNone) {
+			if docTaskDutyForUser(dt, userID) || (isCreator && docTaskDutyMode(dt) == DutyModeNone) {
 				out.AllowedTaskKeys[dt.TaskKey] = true
 			}
 		}
@@ -100,18 +100,24 @@ func stageDutyForUser(st StagePlan, userID int64) bool {
 	return false
 }
 
+func docTaskDutyMode(dt DocTaskPlan) DutyMode {
+	mode, _, _ := ResolveDocTaskDuty(dt)
+	return mode
+}
+
 func docTaskDutyForUser(dt DocTaskPlan, userID int64) bool {
-	if classifyDocDuty(dt.Duties) != DutyModeFull {
+	mode, effective, _ := ResolveDocTaskDuty(dt)
+	if mode != DutyModeFull {
 		return false
 	}
-	return dt.Duties.AuthorUserID == userID ||
-		dt.Duties.ReviewerUserID == userID ||
-		dt.Duties.ApproverUserID == userID
+	return effective.AuthorUserID == userID ||
+		effective.ReviewerUserID == userID ||
+		effective.ApproverUserID == userID
 }
 
 func stageHasUnmanagedDoc(st StagePlan) bool {
 	for _, dt := range st.DocTasks {
-		if dt.Enabled && classifyDocDuty(dt.Duties) == DutyModeNone {
+		if dt.Enabled && docTaskDutyMode(dt) == DutyModeNone {
 			return true
 		}
 	}