diff --git a/src/app/panels/DynamicFormView.cpp b/src/app/panels/DynamicFormView.cpp
index b2dd154..a4e6c5a 100644
--- a/src/app/panels/DynamicFormView.cpp
+++ b/src/app/panels/DynamicFormView.cpp
@@ -111,15 +111,15 @@ void DynamicFormView::clear()
     while (cardLayout_->count() > 0) {
         QLayoutItem* it = cardLayout_->takeAt(0);
         if (it->widget()) it->widget()->deleteLater();
-        if (it->layout()) {
-            // 嵌套网格：先回收其子控件，再删布局，避免残留控件泄漏/重叠。
-            QLayout* sub = it->layout();
+        if (QLayout* sub = it->layout()) {
+            // 嵌套网格：先回收其子控件（控件归属 card_，删布局不会连带删），再让下方
+            // delete it 释放该嵌套布局本身——注意 it == it->layout()（QLayout 即 QLayoutItem），
+            // 故此处不可再 delete sub，否则与 delete it 重复释放导致崩溃。
             while (sub->count() > 0) {
                 QLayoutItem* sit = sub->takeAt(0);
                 if (sit->widget()) sit->widget()->deleteLater();
                 delete sit;
             }
-            delete sub;
         }
         delete it;
     }