diff --git a/.env.example b/.env.example
index f2aa859..d100c19 100644
--- a/.env.example
+++ b/.env.example
@@ -1 +1,7 @@
 VITE_AI_API_URL=http://localhost:8000
+FIR_LIBRARY_PROXY_TARGET=https://cs-fir.luxsin.com.cn
+
+# 前端 FIR API 地址，默认使用生产服务；可手动修改覆盖。
+# 如需使用开发代理，可设为 /fir-library。
+# 生产配置见 .env.production，pnpm build 自动加载。
+VITE_FIR_API_BASE=https://cs-fir.luxsin.com.cn/api
diff --git a/.env.production b/.env.production
new file mode 100644
index 0000000..0f2a497
--- /dev/null
+++ b/.env.production
@@ -0,0 +1,6 @@
+# pnpm build 使用 production 模式，自动加载本文件。
+# 前端直接请求生产 API；/api 对应开发代理中的路径重写。
+VITE_FIR_API_BASE=https://cs-fir.luxsin.com.cn/api
+
+# 仅供 Vite 开发代理使用，不会在静态部署中创建代理。
+FIR_LIBRARY_PROXY_TARGET=https://cs-fir.luxsin.com.cn
diff --git a/client/src/components/FirPanel.tsx b/client/src/components/FirPanel.tsx
index f3dd6c2..9f54b30 100644
--- a/client/src/components/FirPanel.tsx
+++ b/client/src/components/FirPanel.tsx
@@ -6,7 +6,7 @@ import { useEffect, useRef, useState } from 'react';
 import { useDevice } from '@/contexts/DeviceContext';
 import { decodeFirWav, FirError, firRoomName, applyFir, readFirBinary, readFirJson, validateFirBinary, type FirRoom } from '@/lib/fir';
 
-const LIBRARY = (import.meta.env.VITE_FIR_API_BASE || '/fir-library').replace(/\/$/, '');
+const LIBRARY = (import.meta.env.VITE_FIR_API_BASE || 'https://cs-fir.luxsin.com.cn/api').replace(/\/$/, '');
 
 export default function FirPanel() {
   const { ip } = useDevice();
diff --git a/client/src/components/FirRoomDetails.tsx b/client/src/components/FirRoomDetails.tsx
index 555ed14..de0e951 100644
--- a/client/src/components/FirRoomDetails.tsx
+++ b/client/src/components/FirRoomDetails.tsx
@@ -3,7 +3,7 @@ import { Dialog, DialogContent, DialogTitle, DialogDescription, DialogClose } fr
 import { firImageUrl, firRoomName, type FirRoom } from '@/lib/fir';
 import { firTranslate } from '@/lib/firLocale';
 
-const LIBRARY = (import.meta.env.VITE_FIR_API_BASE || '/fir-library').replace(/\/$/, '');
+const LIBRARY = (import.meta.env.VITE_FIR_API_BASE || 'https://cs-fir.luxsin.com.cn/api').replace(/\/$/, '');
 
 type Props = { room: FirRoom; language?: number };
 export function FirRoomDetailsBody({ room, language }: Props) {
diff --git a/package.json b/package.json
index f005317..c80b43c 100644
--- a/package.json
+++ b/package.json
@@ -7,8 +7,8 @@
     "dev": "vite --host",
     "dev:legacy": "vite --config vite.legacy.config.ts --host",
     "build": "pnpm build:legacy && pnpm build:modern",
-    "build:modern": "vite build",
-    "build:legacy": "vite build --config vite.legacy.config.ts",
+    "build:modern": "vite build --mode production",
+    "build:legacy": "vite build --config vite.legacy.config.ts --mode production",
     "build:test": "pnpm build:test:legacy && pnpm build:test:modern",
     "build:test:modern": "DEPLOY_ENV=test vite build",
     "build:test:legacy": "DEPLOY_ENV=test vite build --config vite.legacy.config.ts",
diff --git a/vite.config.ts b/vite.config.ts
index 046e498..f1acb06 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -4,7 +4,7 @@ import tailwindcss from "@tailwindcss/vite";
 import react from "@vitejs/plugin-react";
 import fs from "node:fs";
 import path from "node:path";
-import { defineConfig, type Plugin } from "vite";
+import { defineConfig, loadEnv, type Plugin } from "vite";
 import { vitePluginManusRuntime } from "vite-plugin-manus-runtime";
 
 const PROJECT_ROOT = import.meta.dirname;
@@ -59,7 +59,10 @@ const deployBase = isProd
   ? (DEPLOY_ENV === "test" ? `/${DEPLOY_PROJECT}/test/modern/` : `/${DEPLOY_PROJECT}/v2/modern/`)
   : "/";
 
-export default defineConfig({
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, PROJECT_ROOT, "");
+
+  return {
   plugins,
   base: deployBase,
   resolve: {
@@ -138,7 +141,7 @@ export default defineConfig({
         timeout: 0,
         proxyTimeout: 0,
       },
-      "/fir-library": { target: "http://127.0.0.1:8000", changeOrigin: true, rewrite: p => p.replace(/^\/fir-library/, "/api") },
+      "/fir-library": { target: env.FIR_LIBRARY_PROXY_TARGET || "https://cs-fir.luxsin.com.cn", changeOrigin: true, rewrite: p => p.replace(/^\/fir-library/, "/api") },
       "/luxsin-audio-api": {
         target: "https://api.luxsin.com.cn",
         changeOrigin: true,
@@ -159,4 +162,5 @@ export default defineConfig({
       deny: ["**/.*"],
     },
   },
+  };
 });
diff --git a/vite.legacy.config.ts b/vite.legacy.config.ts
index 0807459..2353171 100644
--- a/vite.legacy.config.ts
+++ b/vite.legacy.config.ts
@@ -3,7 +3,7 @@ import { jsxLocPlugin } from "@builder.io/vite-plugin-jsx-loc";
 import react from "@vitejs/plugin-react";
 import path from "node:path";
 import { createRequire } from "node:module";
-import { defineConfig, type Plugin } from "vite";
+import { defineConfig, loadEnv, type Plugin } from "vite";
 
 const PROJECT_ROOT = import.meta.dirname;
 const require = createRequire(import.meta.url);
@@ -52,7 +52,9 @@ const deployBase = isProd
   ? (DEPLOY_ENV === "test" ? `/${DEPLOY_PROJECT}/test/legacy/` : `/${DEPLOY_PROJECT}/v2/legacy/`)
   : "/";
 
-export default defineConfig({
+export default defineConfig(({ mode }) => {
+  const env = loadEnv(mode, PROJECT_ROOT, "");
+  return {
   plugins: [firDevProxy(),legacySkipModernCssPlugin(), legacyIndexRewritePlugin(), react(), jsxLocPlugin()],
   define: {
     "import.meta.env.VITE_X9_LEGACY": JSON.stringify("1"),
@@ -118,7 +120,7 @@ export default defineConfig({
         timeout: 0,
         proxyTimeout: 0,
       },
-      "/fir-library": { target: "http://127.0.0.1:8000", changeOrigin: true, rewrite: p => p.replace(/^\/fir-library/, "/api") },
+      "/fir-library": { target: env.FIR_LIBRARY_PROXY_TARGET || "https://cs-fir.luxsin.com.cn", changeOrigin: true, rewrite: p => p.replace(/^\/fir-library/, "/api") },
       "/luxsin-audio-api": {
         target: "https://api.luxsin.com.cn",
         changeOrigin: true,
@@ -126,4 +128,5 @@ export default defineConfig({
       },
     },
   },
+  };
 });