diff --git a/resources/icon-192.png b/resources/icon-192.png
new file mode 100644
index 0000000..655b190
Binary files /dev/null and b/resources/icon-192.png differ
diff --git a/resources/icon-512-maskable.png b/resources/icon-512-maskable.png
new file mode 100644
index 0000000..cf96133
Binary files /dev/null and b/resources/icon-512-maskable.png differ
diff --git a/resources/icon-512.png b/resources/icon-512.png
new file mode 100644
index 0000000..dc8da0b
Binary files /dev/null and b/resources/icon-512.png differ
diff --git a/resources/manifest.json b/resources/manifest.json
index f04dc25..8de457c 100644
--- a/resources/manifest.json
+++ b/resources/manifest.json
@@ -8,9 +8,20 @@
   "theme_color": "#000000",
   "icons": [
     {
-      "src": "./icon.png",
+      "src": "/icon-192.png",
       "type": "image/png",
-      "sizes": "256x256"
+      "sizes": "192x192"
+    },
+    {
+      "src": "/icon-512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    },
+    {
+      "src": "/icon-512-maskable.png",
+      "type": "image/png",
+      "sizes": "512x512",
+      "purpose": "maskable"
     }
   ]
 }
diff --git a/resources/sw.js b/resources/sw.js
new file mode 100644
index 0000000..d752f1f
--- /dev/null
+++ b/resources/sw.js
@@ -0,0 +1,13 @@
+// 最小 Service Worker：仅满足 PWA 可安装性要求（需存在 fetch 处理器）。
+// 不做任何缓存拦截，所有请求保持浏览器默认网络行为。
+self.addEventListener('install', () => {
+  self.skipWaiting();
+});
+
+self.addEventListener('activate', (event) => {
+  event.waitUntil(self.clients.claim());
+});
+
+self.addEventListener('fetch', () => {
+  // 特意留空：不拦截，默认走网络
+});
diff --git a/src/renderer/main.ts b/src/renderer/main.ts
index bbfd0b6..8aaa882 100644
--- a/src/renderer/main.ts
+++ b/src/renderer/main.ts
@@ -8,10 +8,20 @@ import { createApp } from 'vue';
 import i18n from '@/../i18n/renderer';
 import router from '@/router';
 import pinia from '@/store';
+import { isElectron } from '@/utils';
 
 import App from './App.vue';
 import directives from './directive';
 
+// Web 端注册最小 Service Worker，使站点满足 PWA 可安装条件（#640/#382）
+if (!isElectron && import.meta.env.PROD && 'serviceWorker' in navigator) {
+  window.addEventListener('load', () => {
+    navigator.serviceWorker.register('/sw.js').catch((error) => {
+      console.warn('[PWA] Service Worker 注册失败:', error);
+    });
+  });
+}
+
 const app = createApp(App);
 
 Object.keys(directives).forEach((key: string) => {