diff --git a/sankey.conf b/sankey.conf
new file mode 100644
index 0000000..3fae8aa
--- /dev/null
+++ b/sankey.conf
@@ -0,0 +1,34 @@
+# HTTPS server
+server {
+    listen 443 ssl;
+    server_name sankey.biboer.cn;
+
+    ssl_certificate /etc/letsencrypt/live/sankey.biboer.cn/fullchain.pem; # managed by Certbot
+    ssl_certificate_key /etc/letsencrypt/live/sankey.biboer.cn/privkey.pem; # managed by Certbot
+    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
+    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
+
+    root /home/gavin/sankey/dist;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+}
+
+# HTTP to HTTPS redirect
+server {
+    listen 80;
+    server_name sankey.biboer.cn;
+
+    if ($host = sankey.biboer.cn) {
+        return 301 https://$host$request_uri;
+    } # managed by Certbot
+
+    return 404;
+}
\ No newline at end of file
diff --git a/vite.config.ts b/vite.config.ts
index 4d1408a..9dc2635 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,12 +1,20 @@
 import { defineConfig } from 'vite';
 import vue from '@vitejs/plugin-vue';
-import { readFileSync } from 'node:fs';
+import { readFileSync, existsSync } from 'node:fs';
 import { homedir } from 'node:os';
 import { join } from 'node:path';
 
 const certDir = join(homedir(), 'mac.biboer.cn_ecc');
-const httpsCert = readFileSync(join(certDir, 'fullchain.cer'));
-const httpsKey = readFileSync(join(certDir, 'mac.biboer.cn.key'));
+const certPath = join(certDir, 'fullchain.cer');
+const keyPath = join(certDir, 'mac.biboer.cn.key');
+
+// 只在证书存在时启用 HTTPS（开发环境）
+const httpsConfig = existsSync(certPath) && existsSync(keyPath)
+  ? {
+      cert: readFileSync(certPath),
+      key: readFileSync(keyPath)
+    }
+  : undefined;
 
 export default defineConfig({
   plugins: [vue()],
@@ -15,9 +23,6 @@ export default defineConfig({
     port: 5173,
     strictPort: true,
     allowedHosts: ['mac.biboer.cn'],
-    https: {
-      cert: httpsCert,
-      key: httpsKey
-    }
+    https: httpsConfig
   }
 });