diff --git a/entry/src/main/ets/pages/MainPage.ets b/entry/src/main/ets/pages/MainPage.ets
index fc48dc7..741e878 100644
--- a/entry/src/main/ets/pages/MainPage.ets
+++ b/entry/src/main/ets/pages/MainPage.ets
@@ -1,38 +1,82 @@
 import { GraphDatabase } from '../model/GraphDatabase';
 import { GraphPage } from './GraphPage';
 import { ChatPage } from './ChatPage';
+import display from '@ohos.display';
 
 @Component
 export struct MainPage {
     @Prop db: GraphDatabase;
+    @State isWide: boolean = false;
+
+    aboutToAppear() {
+        this.updateBreakpoint();
+        try {
+            display.on('change', () => {
+                this.updateBreakpoint();
+            });
+        } catch (e) {
+            console.error('display.on error: ' + JSON.stringify(e));
+        }
+    }
+
+    private updateBreakpoint(): void {
+        try {
+            const defaultWindow = display.getDefaultDisplaySync();
+            this.isWide = defaultWindow.width > 520;
+        } catch (e) {
+            console.error('updateBreakpoint error: ' + JSON.stringify(e));
+        }
+    }
 
     build() {
-        GridRow({ columns: { sm: 1, md: 2, lg: 2 }, gutter: { x: 8, y: 8 } }) {
-            GridCol({ span: { sm: 1, md: 1, lg: 1 } }) {
+        if (this.isWide) {
+            // ======== 宽屏模式（>520px）：左侧星图 + 右侧聊天 ========
+            Row() {
+                GraphPage({ db: this.db })
+                    .layoutWeight(1)
+                    .height('100%')
+                    .clip(true)
+                    .borderRadius(12)
+                    .margin({ left: 4, right: 2 })
+
+                ChatPage({ db: this.db })
+                    .width(380)
+                    .height('100%')
+                    .clip(true)
+                    .borderRadius(12)
+                    .margin({ left: 2, right: 4 })
+            }
+            .width('100%')
+            .height('100%')
+            .padding(4)
+            .backgroundColor('#1A1B2E')
+            .backgroundBlurStyle(BlurStyle.Regular)
+        } else {
+            // ======== 窄屏模式（≤520px）：上方星图(55%) + 下方聊天(45%) ========
+            Column() {
                 Stack() {
                     GraphPage({ db: this.db })
                 }
-                .backgroundColor('rgba(255,255,255,0.05)')
-                .borderRadius(12)
-                .backgroundBlurStyle(BlurStyle.Thin)
+                .height('55%')
                 .width('100%')
-                .height('100%')
-            }
+                .clip(true)
+                .borderRadius(12)
+                .margin({ top: 2, left: 4, right: 4, bottom: 2 })
 
-            GridCol({ span: { sm: 1, md: 1, lg: 1 } }) {
                 Stack() {
                     ChatPage({ db: this.db })
                 }
-                .backgroundColor('rgba(255,255,255,0.05)')
-                .borderRadius(12)
-                .backgroundBlurStyle(BlurStyle.Thin)
+                .height('45%')
                 .width('100%')
-                .height('100%')
+                .clip(true)
+                .borderRadius(12)
+                .margin({ top: 2, left: 4, right: 4, bottom: 2 })
             }
+            .width('100%')
+            .height('100%')
+            .padding(2)
+            .backgroundColor('#1A1B2E')
+            .backgroundBlurStyle(BlurStyle.Regular)
         }
-        .width('100%')
-        .height('100%')
-        .backgroundColor('#1A1B2E')
-        .backgroundBlurStyle(BlurStyle.Regular)
     }
 }
diff --git a/entry/src/main/resources/rawfile/graph.html b/entry/src/main/resources/rawfile/graph.html
index 446758c..2a26322 100644
--- a/entry/src/main/resources/rawfile/graph.html
+++ b/entry/src/main/resources/rawfile/graph.html
@@ -121,7 +121,8 @@
             mouse = new THREE.Vector2();
             createStarField();
             createNebula();
-            window.addEventListener('resize', onWindowResize);
+            // 使用 ResizeObserver 监听容器尺寸变化（比 window.resize 更准确）
+            initResizeObserver();
             renderer.domElement.addEventListener('mousemove', onMouseMove);
             renderer.domElement.addEventListener('click', onMouseClick);
             window.addEventListener('message', (event) => {
@@ -742,10 +743,72 @@
             }
         }
 
-        function onWindowResize() {
-            camera.aspect = window.innerWidth / window.innerHeight;
+        // ========= ResizeObserver 响应式适配 =========
+        let containerObserver = null;
+        function initResizeObserver() {
+            const container = document.getElementById('canvas-container');
+            if (!container) return;
+            containerObserver = new ResizeObserver((entries) => {
+                for (const entry of entries) {
+                    const { width, height } = entry.contentRect;
+                    if (width > 0 && height > 0) {
+                        onContainerResize(width, height);
+                    }
+                }
+            });
+            containerObserver.observe(container);
+        }
+
+        function onContainerResize(width, height) {
+            if (!camera || !renderer) return;
+            const aspect = width / height;
+            camera.aspect = aspect;
             camera.updateProjectionMatrix();
-            renderer.setSize(window.innerWidth, window.innerHeight);
+            renderer.setSize(width, height);
+
+            // 窄屏(<500px)时自动调整UI元素尺寸和位置
+            const isNarrow = width < 500;
+            const stats = document.getElementById('stats');
+            const nodeInfo = document.getElementById('node-info');
+            const searchBox = document.getElementById('search-box');
+            const typeFilter = document.getElementById('type-filter');
+            const searchInput = document.getElementById('search-input');
+
+            if (isNarrow) {
+                if (stats) {
+                    stats.style.fontSize = '11px';
+                    stats.style.padding = '8px 12px';
+                    stats.style.top = '6px';
+                    stats.style.left = '6px';
+                }
+                if (nodeInfo) {
+                    nodeInfo.style.fontSize = '11px';
+                    nodeInfo.style.padding = '8px 12px';
+                    nodeInfo.style.maxWidth = '180px';
+                    nodeInfo.style.top = '6px';
+                    nodeInfo.style.right = '6px';
+                }
+                if (searchBox) { searchBox.style.top = '70px'; searchBox.style.left = '6px'; }
+                if (searchInput) { searchInput.style.width = '140px'; searchInput.style.fontSize = '12px'; }
+                if (typeFilter) { typeFilter.style.top = '108px'; typeFilter.style.left = '6px'; }
+            } else {
+                if (stats) {
+                    stats.style.fontSize = '14px';
+                    stats.style.padding = '15px 20px';
+                    stats.style.top = '20px';
+                    stats.style.left = '20px';
+                }
+                if (nodeInfo) {
+                    nodeInfo.style.fontSize = '14px';
+                    nodeInfo.style.padding = '15px 20px';
+                    nodeInfo.style.maxWidth = '300px';
+                    nodeInfo.style.top = '20px';
+                    nodeInfo.style.right = '20px';
+                }
+                if (searchBox) { searchBox.style.top = '80px'; searchBox.style.left = '20px'; }
+                if (searchInput) { searchInput.style.width = '200px'; searchInput.style.fontSize = '14px'; }
+                if (typeFilter) { typeFilter.style.top = '120px'; typeFilter.style.left = '20px'; }
+            }
         }
 
         function animate() {