diff --git a/jeecgboot-vue3/src/layouts/default/header/MultipleHeader.vue b/jeecgboot-vue3/src/layouts/default/header/MultipleHeader.vue
index 50e190640..a329398c8 100644
--- a/jeecgboot-vue3/src/layouts/default/header/MultipleHeader.vue
+++ b/jeecgboot-vue3/src/layouts/default/header/MultipleHeader.vue
@@ -141,10 +141,11 @@
   .@{prefix-cls} {
     transition: width 0.2s;
     flex: 0 0 auto;
-
-    &--dark {
-      margin-left: -1px;
-    }
+    // update-begin--author:liaozhiyang---date:20250818---for：【issues/8709】LayoutContent样式多出1px
+    // &--dark {
+    //   margin-left: -1px;
+    // }
+    // update-end--author:liaozhiyang---date:20250818---for：【issues/8709】LayoutContent样式多出1px
 
     &--fixed {
       position: fixed;
diff --git a/jeecgboot-vue3/src/layouts/default/header/index.less b/jeecgboot-vue3/src/layouts/default/header/index.less
index 08604877c..a7a0adc68 100644
--- a/jeecgboot-vue3/src/layouts/default/header/index.less
+++ b/jeecgboot-vue3/src/layouts/default/header/index.less
@@ -7,7 +7,9 @@
   display: flex;
   height: @header-height;
   padding: 0;
-  margin-left: -1px;
+  // update-begin--author:liaozhiyang---date:20250818---for：【issues/8709】LayoutContent样式多出1px
+  // margin-left: -1px;
+  // update-end--author:liaozhiyang---date:20250818---for：【issues/8709】LayoutContent样式多出1px
   line-height: @header-height;
   color: @white;
   background-color: @white;
@@ -170,7 +172,9 @@
   &--dark {
     background-color: @header-dark-bg-color !important;
     // border-bottom: 1px solid @border-color-base;
-    border-left: 1px solid @border-color-base;
+    // update-begin--author:liaozhiyang---date:20250818---for：【issues/8709】LayoutContent样式多出1px
+    // border-left: 1px solid @border-color-base;
+    // update-end--author:liaozhiyang---date:20250818---for：【issues/8709】LayoutContent样式多出1px
 
     .@{header-prefix-cls}-logo {
       &:hover {
diff --git a/jeecgboot-vue3/src/layouts/default/index.vue b/jeecgboot-vue3/src/layouts/default/index.vue
index c8fe28cba..b0cbbd850 100644
--- a/jeecgboot-vue3/src/layouts/default/index.vue
+++ b/jeecgboot-vue3/src/layouts/default/index.vue
@@ -86,7 +86,9 @@
 
     &-main {
       width: 100%;
-      margin-left: 1px;
+      // update-begin--author:liaozhiyang---date:20250818---for：【issues/8709】LayoutContent样式多出1px
+      // margin-left: 1px;
+      // update-end--author:liaozhiyang---date:20250818---for：【issues/8709】LayoutContent样式多出1px
     }
   }
 </style>