diff --git a/frontend/index.html b/frontend/index.html
index 8390096..500427d 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -4,8 +4,39 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover" />
     <meta name="theme-color" content="#f3f0e9" />
-    <meta name="description" content="让零散念头继续生长的私人笔记本" />
+    <meta
+      name="description"
+      content="一个先保存、后理解的私人 AI 笔记本。自由记录零散念头，由 AI 在后台整理并跟踪它们如何生长。"
+    />
+    <meta property="og:type" content="website" />
+    <meta property="og:locale" content="zh_CN" />
+    <meta property="og:site_name" content="续想" />
+    <meta property="og:title" content="续想｜让零散的念头，继续往前走" />
+    <meta
+      property="og:description"
+      content="一个先保存、后理解的私人 AI 笔记本。自由记录零散念头，由 AI 在后台整理并跟踪它们如何生长。"
+    />
+    <meta property="og:url" content="https://note.k1412.top/" />
+    <meta property="og:image" content="https://note.k1412.top/share-card.png" />
+    <meta property="og:image:secure_url" content="https://note.k1412.top/share-card.png" />
+    <meta property="og:image:type" content="image/png" />
+    <meta property="og:image:width" content="1200" />
+    <meta property="og:image:height" content="630" />
+    <meta
+      property="og:image:alt"
+      content="续想：让零散的念头，继续往前走。"
+    />
+    <meta name="twitter:card" content="summary_large_image" />
+    <meta name="twitter:title" content="续想｜让零散的念头，继续往前走" />
+    <meta
+      name="twitter:description"
+      content="一个先保存、后理解的私人 AI 笔记本。自由记录零散念头，由 AI 在后台整理并跟踪它们如何生长。"
+    />
+    <meta name="twitter:image" content="https://note.k1412.top/share-card.png" />
+    <meta name="twitter:image:alt" content="续想：让零散的念头，继续往前走。" />
     <link rel="icon" href="/icon.svg" type="image/svg+xml" />
+    <link rel="apple-touch-icon" href="/logo-512.png" />
+    <link rel="image_src" href="https://note.k1412.top/share-card.png" />
     <link rel="manifest" href="/manifest.webmanifest" />
     <title>续想</title>
   </head>
@@ -14,4 +45,3 @@
     <script type="module" src="/src/main.tsx"></script>
   </body>
 </html>
-
diff --git a/frontend/public/logo-512.png b/frontend/public/logo-512.png
new file mode 100644
index 0000000..0d2dce9
Binary files /dev/null and b/frontend/public/logo-512.png differ
diff --git a/frontend/public/manifest.webmanifest b/frontend/public/manifest.webmanifest
index aeb7ae6..d145dae 100644
--- a/frontend/public/manifest.webmanifest
+++ b/frontend/public/manifest.webmanifest
@@ -1,7 +1,7 @@
 {
   "name": "续想",
   "short_name": "续想",
-  "description": "让零散念头继续生长的私人笔记本",
+  "description": "一个先保存、后理解的私人 AI 笔记本。自由记录零散念头，由 AI 在后台整理并跟踪它们如何生长。",
   "start_url": "/",
   "display": "standalone",
   "background_color": "#f3f0e9",
@@ -12,7 +12,12 @@
       "sizes": "any",
       "type": "image/svg+xml",
       "purpose": "any maskable"
+    },
+    {
+      "src": "/logo-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any"
     }
   ]
 }
-
diff --git a/frontend/public/share-card.png b/frontend/public/share-card.png
new file mode 100644
index 0000000..ead3abc
Binary files /dev/null and b/frontend/public/share-card.png differ