diff --git a/packages/core/src/App.ts b/packages/core/src/App.ts
index 3d45d818..e615f145 100644
--- a/packages/core/src/App.ts
+++ b/packages/core/src/App.ts
@@ -39,9 +39,10 @@ import { DATA_SOURCE_FIELDS_CHANGE_EVENT_PREFIX } from '@tmagic/utils';
 
 import Env from './Env';
 import { bindCommonEventListener, isCommonMethod, triggerCommonMethod } from './events';
+import Flexible from './Flexible';
 import Node from './Node';
 import Page from './Page';
-import { calcFontsize, transformStyle as defaultTransformStyle } from './utils';
+import { transformStyle as defaultTransformStyle } from './utils';
 
 interface AppOptionsConfig {
   ua?: string;
@@ -73,7 +74,6 @@ class App extends EventEmitter implements AppCore {
   public useMock = false;
   public platform = 'mobile';
   public jsEngine: JsEngine = 'browser';
-  public designWidth = 375;
   public request?: RequestFunction;
 
   public components = new Map();
@@ -81,6 +81,8 @@ class App extends EventEmitter implements AppCore {
   public eventQueueMap: Record<string, EventCache[]> = {};
   public transformStyle: (style: Record<string, any>) => Record<string, any>;
 
+  public flexible?: Flexible;
+
   private eventList = new Map<(fromCpt: Node, ...args: any[]) => void, string>();
   private dataSourceEventList = new Map<string, Map<string, (...args: any[]) => void>>();
 
@@ -97,8 +99,8 @@ class App extends EventEmitter implements AppCore {
       this.useMock = options.useMock;
     }
 
-    if (typeof options.designWidth !== 'undefined') {
-      this.setDesignWidth(options.designWidth);
+    if (this.jsEngine === 'browser') {
+      this.flexible = new Flexible({ designWidth: options.designWidth });
     }
 
     this.transformStyle =
@@ -120,13 +122,7 @@ class App extends EventEmitter implements AppCore {
   }
 
   public setDesignWidth(width: number) {
-    this.designWidth = width;
-    // 根据屏幕大小计算出跟节点的font-size，用于rem样式的适配
-    if (this.jsEngine === 'browser') {
-      this.calcFontsize();
-      globalThis.removeEventListener('resize', this.calcFontsize);
-      globalThis.addEventListener('resize', this.calcFontsize);
-    }
+    this.flexible?.setDesignWidth(width);
   }
 
   /**
@@ -331,9 +327,8 @@ class App extends EventEmitter implements AppCore {
     this.removeAllListeners();
     this.page = undefined;
 
-    if (this.jsEngine === 'browser') {
-      globalThis.removeEventListener('resize', this.calcFontsize);
-    }
+    this.flexible?.destroy();
+    this.flexible = undefined;
   }
 
   private bindDataSourceEvents() {
@@ -418,10 +413,6 @@ class App extends EventEmitter implements AppCore {
       this.eventQueueMap[event.eventConfig.to] = [event];
     }
   }
-
-  private calcFontsize() {
-    calcFontsize(this.designWidth);
-  }
 }
 
 export default App;
diff --git a/packages/core/src/Env.ts b/packages/core/src/Env.ts
index 58972641..ee00a825 100644
--- a/packages/core/src/Env.ts
+++ b/packages/core/src/Env.ts
@@ -27,6 +27,7 @@ class Env {
   isMqq = false;
   isWechat = false;
   isWeb = false;
+  isOpenHarmony = false;
 
   constructor(ua = globalThis.navigator.userAgent, options: Record<string, boolean | string> = {}) {
     this.isIphone = ua.indexOf('iPhone') >= 0;
@@ -47,7 +48,9 @@ class Env {
 
     this.isWechat = ua.indexOf('MicroMessenger') >= 0 && ua.indexOf('wxwork') < 0;
 
-    this.isWeb = !this.isIos && !this.isAndroid && !/(WebOS|BlackBerry)/.test(ua);
+    this.isOpenHarmony = ua.includes('OpenHarmony');
+
+    this.isWeb = !this.isIos && !this.isAndroid && !this.isOpenHarmony && !/(WebOS|BlackBerry)/.test(ua);
 
     Object.entries(options).forEach(([key, value]) => {
       (this as any)[key] = value;
diff --git a/packages/core/src/Flexible.ts b/packages/core/src/Flexible.ts
new file mode 100644
index 00000000..d59f96f7
--- /dev/null
+++ b/packages/core/src/Flexible.ts
@@ -0,0 +1,72 @@
+export default class Flexible {
+  public designWidth = 375;
+  private tid: NodeJS.Timeout | undefined;
+
+  constructor(options?: { designWidth?: number }) {
+    if (globalThis.document.readyState === 'complete') {
+      this.setBodyFontSize();
+    } else {
+      globalThis.document.addEventListener('DOMContentLoaded', this.setBodyFontSize, false);
+    }
+
+    globalThis.addEventListener('resize', this.resizeHandler, false);
+    globalThis.addEventListener('pageshow', this.pageshowHandler, false);
+
+    if (typeof options?.designWidth !== 'undefined') {
+      this.setDesignWidth(options.designWidth);
+    }
+  }
+
+  public destroy() {
+    globalThis.document.removeEventListener('DOMContentLoaded', this.setBodyFontSize, false);
+    globalThis.removeEventListener('resize', this.resizeHandler, false);
+    globalThis.removeEventListener('pageshow', this.pageshowHandler, false);
+  }
+
+  public setDesignWidth(width: number) {
+    this.designWidth = width;
+    this.refreshRem();
+  }
+
+  public setBodyFontSize() {
+    globalThis.document.body.style.fontSize = '.12rem';
+  }
+
+  public refreshRem() {
+    const { width } = document.documentElement.getBoundingClientRect();
+    const fontSize = width / (this.designWidth / 100);
+    globalThis.document.documentElement.style.fontSize = `${fontSize}px`;
+    globalThis.document.documentElement.style.fontSize = `${this.correctRem(fontSize)}px`;
+  }
+
+  /**
+   * 纠正由于文字缩放导致的字体大小计算不正确问题
+   * @param {number} fontSize
+   * @returns {number}
+   */
+  public correctRem(fontSize: number) {
+    const { document } = globalThis;
+    const d = document.createElement('div');
+    d.style.cssText = 'width:1rem;height:0;overflow:hidden;position:absolute;z-index:-1;visibility:hidden;';
+    document.documentElement.appendChild(d);
+    const dw = d.offsetWidth;
+    document.documentElement.removeChild(d);
+    if (Math.abs(dw - fontSize) > 1) {
+      return fontSize ** 2 / dw;
+    }
+    return fontSize;
+  }
+
+  private resizeHandler = () => {
+    clearTimeout(this.tid);
+    this.tid = setTimeout(() => {
+      this.refreshRem();
+    }, 300);
+  };
+
+  private pageshowHandler = (e: PageTransitionEvent) => {
+    if (e.persisted) {
+      this.resizeHandler();
+    }
+  };
+}
diff --git a/packages/core/src/utils.ts b/packages/core/src/utils.ts
index 8a0590db..5c89ec70 100644
--- a/packages/core/src/utils.ts
+++ b/packages/core/src/utils.ts
@@ -115,9 +115,3 @@ export const transformStyle = (style: Record<string, any> | string, jsEngine: Js
 
   return results;
 };
-
-export const calcFontsize = (designWidth: number) => {
-  const { width } = document.documentElement.getBoundingClientRect();
-  const fontSize = width / (designWidth / 100);
-  document.documentElement.style.fontSize = `${fontSize}px`;
-};