diff --git a/src/App.vue b/src/App.vue
index 75cc956..80716d1 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, reactive, computed, onMounted } from "vue";
+import { ref, reactive, computed, onMounted, watch, onBeforeUnmount } from "vue";
 import layout from "./components/layout.vue";
 import { useRouter } from "vue-router";
 import config from "@/assets/config/host.config";
@@ -12,6 +12,17 @@ const isLogin = ref(false);
 // 嵌入页旁路（/embed/**，iframe 免签嵌入）：子应用 Drawer 里打开，带不了本应用 CAS 会话，
 // 也不该出现菜单壳。判定用路由前缀而非 query 标记——刷新/直链/分享均稳定
 const isEmbed = computed(() => router.currentRoute.value.path.startsWith("/embed/"));
+
+// 嵌入页必须旁路全局 body 的 min-width（assets/styles/base/_base.scss 的 1200px）：
+// 上面 isEmbed 只旁路了组件壳，管不到全局 CSS，740px 的 iframe 里页面仍按 ≥1200px 排版，
+// 表现为整体右偏 + 右侧被裁。用内联样式覆盖（优先级高于样式表），非嵌入态移除内联属性回落到原值
+function syncEmbedLayout(embed: boolean) {
+    if (embed) document.body.style.minWidth = "0";
+    else document.body.style.removeProperty("min-width");
+}
+watch(isEmbed, syncEmbedLayout, { immediate: true });
+onBeforeUnmount(() => syncEmbedLayout(false));
+
 const layoutData = reactive({
     appName: "流程中心",
     baseHost: config.baseHost,