diff --git a/app/api/routers/rbac_opc.py b/app/api/routers/rbac_opc.py
index e0e792f..f56bc41 100644
--- a/app/api/routers/rbac_opc.py
+++ b/app/api/routers/rbac_opc.py
@@ -55,12 +55,26 @@ async def opc_agent(
     }
 
 
-@router.get("/tasks", summary="任务广场（已发布平台任务）")
+@router.get("/tasks", summary="任务广场（已发布平台任务，公开可见）")
 async def opc_task_square(
     db: Database = Depends(get_db),
-    _u: dict = Depends(require_roles("opc_member")),
 ):
-    return {"items": await db.tasks.list(status="published")}
+    """任务广场公开可见：返回已发布(published)任务，按展示优先级降序。查看无需登录。"""
+    items = await db.tasks.list_published()
+    items.sort(key=lambda t: -(t.get("display_priority") or 0))
+    return {"items": items}
+
+
+@router.get("/tasks/{task_id}", summary="任务详情（公开可见）")
+async def opc_task_detail(
+    task_id: str,
+    db: Database = Depends(get_db),
+):
+    """任务详情，公开可见：仅返回已发布任务；否则 404。"""
+    item = await db.tasks.get(task_id)
+    if item is None or item.get("status") != "published":
+        raise HTTPException(status_code=404, detail="任务不存在")
+    return item
 
 
 @router.get("/my-tasks", summary="我的任务看板")