diff --git a/src/layout/component/aside.vue b/src/layout/component/aside.vue
index fd32d3d2..83c172b1 100644
--- a/src/layout/component/aside.vue
+++ b/src/layout/component/aside.vue
@@ -12,7 +12,6 @@
 <script setup lang="ts" name="layoutAside">
 import {computed, defineAsyncComponent, onBeforeMount, reactive, ref, watch} from 'vue';
 import {storeToRefs} from 'pinia';
-import pinia from '/@/stores/index';
 import {useRoutesList} from '/@/stores/routesList';
 import {useThemeConfig} from '/@/stores/themeConfig';
 import {useTagsViewRoutes} from '/@/stores/tagsViewRoutes';
@@ -141,8 +140,8 @@ onBeforeMount(() => {
 	mittBus.on('setSendClassicChildren', (res: MittMenu) => {
 		let { layout, isClassicSplitMenu } = themeConfig.value;
 		if (layout === 'classic' && isClassicSplitMenu) {
-			state.menuList = [];
-			state.menuList = res.children;
+			// 不要先清空再赋值，避免菜单闪断导致父级折叠
+			state.menuList = res.children || [];
 		}
 	});
 	mittBus.on('getBreadcrumbIndexSetFilterRoutes', () => {
@@ -159,11 +158,11 @@ watch(themeConfig.value, (val) => {
 		if (layoutAsideScrollbarRef.value) layoutAsideScrollbarRef.value.update();
 	}
 });
-// 监听 pinia 值的变化，动态赋值给菜单中
+// 仅在路由表变化时重建侧栏，避免任意 pinia 写入都重置展开状态
 watch(
-	pinia.state,
-	(val) => {
-		let { layout, isClassicSplitMenu } = val.themeConfig.themeConfig;
+	routesList,
+	() => {
+		let { layout, isClassicSplitMenu } = themeConfig.value;
 		if (layout === 'classic' && isClassicSplitMenu) return false;
 		setFilterRoutes();
 	},
diff --git a/src/layout/navMenu/vertical.vue b/src/layout/navMenu/vertical.vue
index b76c17b2..b384221f 100644
--- a/src/layout/navMenu/vertical.vue
+++ b/src/layout/navMenu/vertical.vue
@@ -1,14 +1,16 @@
 <template>
 	<el-menu
 		router
+		:key="state.menuRenderKey"
 		:default-active="state.defaultActive"
+		:default-openeds="state.defaultOpeneds"
 		background-color="transparent"
 		:collapse="state.isCollapse"
 		:unique-opened="getThemeConfig.isUniqueOpened"
 		:collapse-transition="false"
 	>
 		<template v-for="val in menuLists">
-      <!-- 三级菜单 -->
+			<!-- 三级菜单 -->
 			<el-sub-menu :index="val.path" v-if="val.children && val.children.length > 0" :key="val.path">
 				<template #title>
 					<SvgIcon :name="val.meta.icon" />
@@ -17,7 +19,7 @@
 				<SubItem :chil="val.children" />
 			</el-sub-menu>
 			<template v-else>
-        <!-- 二级菜单       -->
+				<!-- 二级菜单       -->
 				<el-menu-item :index="val.path" :key="val.path">
 					<SvgIcon :name="val.meta.icon" />
 					<template #title v-if="!val.meta.isLink || (val.meta.isLink && val.meta.isIframe)">
@@ -33,12 +35,12 @@
 </template>
 
 <script setup lang="ts" name="navMenuVertical">
-import {RouteRecordRaw} from 'vue-router';
-import {useThemeConfig} from '/@/stores/themeConfig';
-import other from '/@/utils/other';
+import { RouteRecordRaw } from "vue-router"
+import { useThemeConfig } from "/@/stores/themeConfig"
+import other from "/@/utils/other"
 
 // 引入组件
-const SubItem = defineAsyncComponent(() => import('/@/layout/navMenu/subItem.vue'));
+const SubItem = defineAsyncComponent(() => import("/@/layout/navMenu/subItem.vue"))
 
 // 定义父组件传过来的值
 const props = defineProps({
@@ -47,54 +49,103 @@ const props = defineProps({
 		type: Array<RouteRecordRaw>,
 		default: () => [],
 	},
-});
+})
 
 // 定义变量内容
-const storesThemeConfig = useThemeConfig();
-const { themeConfig } = storeToRefs(storesThemeConfig);
-const route = useRoute();
+const storesThemeConfig = useThemeConfig()
+const { themeConfig } = storeToRefs(storesThemeConfig)
+const route = useRoute()
 const state = reactive({
 	defaultActive: route.meta.isDynamic ? route.meta.isDynamicPath : route.path,
+	defaultOpeneds: [] as string[],
+	menuRenderKey: 0,
 	isCollapse: false,
-});
+})
 
 // 获取父级菜单数据
 const menuLists = computed(() => {
-	return <RouteItems>props.menuList;
-});
+	return <RouteItems>props.menuList
+})
 // 获取布局配置信息
 const getThemeConfig = computed(() => {
-	return themeConfig.value;
-});
+	return themeConfig.value
+})
 // 菜单高亮（详情时，父级高亮）
 const setParentHighlight = (currentRoute: RouteToFrom) => {
-	const { path, meta } = currentRoute;
-	const pathSplit = meta?.isDynamic ? meta.isDynamicPath!.split('/') : path!.split('/');
-	if (pathSplit.length >= 4 && meta?.isHide) return pathSplit.splice(0, 3).join('/');
-	else return path;
-};
+	const { path, meta } = currentRoute
+	const pathSplit = meta?.isDynamic ? meta.isDynamicPath!.split("/") : path!.split("/")
+	if (pathSplit.length >= 4 && meta?.isHide) return pathSplit.splice(0, 3).join("/")
+	else return path
+}
+
+/** 找到当前激活项的所有父级 path，保持左侧分组展开 */
+const findParentPaths = (menus: RouteItems, active: string, trail: string[] = []): string[] | null => {
+	for (const m of menus || []) {
+		if (!m) continue
+		if (m.path === active) {
+			return trail
+		}
+		if (m.children && m.children.length > 0) {
+			const found = findParentPaths(m.children as RouteItems, active, [...trail, m.path])
+			if (found) return found
+		}
+	}
+	// 隐藏子路由 / 详情页：按前缀打开最近父级
+	for (const m of menus || []) {
+		if (!m?.children?.length) continue
+		if (active.startsWith(`${m.path}/`)) {
+			const found = findParentPaths(m.children as RouteItems, active, [...trail, m.path])
+			if (found) return found
+			return [...trail, m.path]
+		}
+	}
+	return null
+}
+
+const refreshMenuState = (currentRoute: RouteToFrom = route) => {
+	const active = setParentHighlight(currentRoute) as string
+	const openeds = findParentPaths(menuLists.value, active) || []
+	const sameActive = state.defaultActive === active
+	const sameOpeneds =
+		state.defaultOpeneds.length === openeds.length && state.defaultOpeneds.every((p, i) => p === openeds[i])
+	state.defaultActive = active
+	state.defaultOpeneds = openeds
+	// 仅在激活项或父级展开变化时重渲染，避免无意义闪烁
+	if (!sameActive || !sameOpeneds) {
+		state.menuRenderKey += 1
+	}
+}
+
 // 打开外部链接
 const onALinkClick = (val: RouteItem) => {
-	other.handleOpenLink(val);
-};
+	other.handleOpenLink(val)
+}
 // 页面加载时
 onMounted(() => {
-	state.defaultActive = setParentHighlight(route);
-});
+	refreshMenuState(route)
+})
 // 路由更新时
 onBeforeRouteUpdate((to) => {
-	state.defaultActive = setParentHighlight(to);
-	const clientWidth = document.body.clientWidth;
-	if (clientWidth < 1000) themeConfig.value.isCollapse = false;
-});
+	refreshMenuState(to)
+	const clientWidth = document.body.clientWidth
+	if (clientWidth < 1000) themeConfig.value.isCollapse = false
+})
+// 侧栏菜单数据被经典分栏/路由过滤重建后，重新带上父级展开
+watch(
+	menuLists,
+	() => {
+		refreshMenuState(route)
+	},
+	{ deep: true },
+)
 // 设置菜单的收起/展开
 watch(
 	themeConfig.value,
 	() => {
-		document.body.clientWidth <= 1000 ? (state.isCollapse = false) : (state.isCollapse = themeConfig.value.isCollapse);
+		document.body.clientWidth <= 1000 ? (state.isCollapse = false) : (state.isCollapse = themeConfig.value.isCollapse)
 	},
 	{
 		immediate: true,
-	}
-);
+	},
+)
 </script>