diff --git a/frontend/src/pages/admin/AdminTasksPage.tsx b/frontend/src/pages/admin/AdminTasksPage.tsx
index 961aa33..01e2f1c 100644
--- a/frontend/src/pages/admin/AdminTasksPage.tsx
+++ b/frontend/src/pages/admin/AdminTasksPage.tsx
@@ -47,8 +47,8 @@ export default function AdminTasksPage() {
   // 手风琴展开状态
   const [expandedOrders, setExpandedOrders] = useState<Set<string>>(new Set());
 
-  // 任务树展开
-  const [expandedProducts, setExpandedProducts] = useState<Set<string>>(new Set());
+  // 🔧 排他展开：同时只展开一个产品的流转树
+  const [activeTreeProductId, setActiveTreeProductId] = useState<string | null>(null);
   const [taskTrees, setTaskTrees] = useState<Record<string, ProductScanResponse | null>>({});
   const [treeLoading, setTreeLoading] = useState<Record<string, boolean>>({});
 
@@ -121,38 +121,22 @@ export default function AdminTasksPage() {
     });
   }
 
-  // ---- 任务树展开/收起 ----
+  // ---- 排他展开（手风琴模式） ----
   async function toggleProductTree(serialNumber: string) {
-    setExpandedProducts((prev) => {
-      const next = new Set(prev);
-      if (next.has(serialNumber)) {
-        next.delete(serialNumber);
-        return next;
-      }
-      // 加载任务树
-      next.add(serialNumber);
-      if (!taskTrees[serialNumber]) {
-        setTreeLoading((s) => ({ ...s, [serialNumber]: true }));
-        scanProduct(serialNumber)
-          .then((result) => {
-            setTaskTrees((s) => ({ ...s, [serialNumber]: result }));
-          })
-          .catch((err: any) => {
-            const msg =
-              err?.response?.data?.detail ?? err?.message ?? "加载任务树失败";
-            toast(msg, "error");
-            setExpandedProducts((prev2) => {
-              const n2 = new Set(prev2);
-              n2.delete(serialNumber);
-              return n2;
-            });
-          })
-          .finally(() => {
-            setTreeLoading((s) => ({ ...s, [serialNumber]: false }));
-          });
-      }
-      return next;
-    });
+    // 点击已展开的树 → 收起
+    if (activeTreeProductId === serialNumber) {
+      setActiveTreeProductId(null);
+      return;
+    }
+    // 展开新的 → 自动收起旧的
+    setActiveTreeProductId(serialNumber);
+    if (!taskTrees[serialNumber]) {
+      setTreeLoading((s) => ({ ...s, [serialNumber]: true }));
+      scanProduct(serialNumber)
+        .then((result) => setTaskTrees((s) => ({ ...s, [serialNumber]: result })))
+        .catch((err: any) => toast(err?.response?.data?.detail ?? err?.message ?? "加载任务树失败", "error"))
+        .finally(() => setTreeLoading((s) => ({ ...s, [serialNumber]: false })));
+    }
   }
 
   // ---- 任务操作 ----
@@ -378,7 +362,7 @@ export default function AdminTasksPage() {
 
                     {/* 产品行 */}
                     {group.products.map((p) => {
-                      const productExpanded = expandedProducts.has(p.serial_number);
+                      const productExpanded = activeTreeProductId === p.serial_number;
                       const isTreeLoading = treeLoading[p.serial_number];
                       const tree = taskTrees[p.serial_number];
                       // 综合状态：优先流转树状态，兜底产品状态