diff --git a/app/composables/useApi.js b/app/composables/useApi.js
index 0442db7..c2f0ead 100644
--- a/app/composables/useApi.js
+++ b/app/composables/useApi.js
@@ -84,6 +84,31 @@ export function useApi() {
     return { timeStr, nonce }
   }
 
+  async function fetchJson(url, options = {}) {
+    const response = await fetch(url, options)
+    const text = await response.text()
+    let result = null
+
+    if (text) {
+      try {
+        result = JSON.parse(text)
+      } catch {
+        const err = new Error(text || `请求失败 (${response.status})`)
+        err.code = response.status
+        throw err
+      }
+    }
+
+    if (!response.ok) {
+      const err = new Error(result?.msg || result?.message || `请求失败 (${response.status})`)
+      err.code = result?.code || response.status
+      err.response = result
+      throw err
+    }
+
+    return result || {}
+  }
+
   /**
    * 发起请求
    */
@@ -95,7 +120,10 @@ export function useApi() {
      * 服务端（SSR）直接请求后端，避免内部再走一次 Nitro 代理时
      * form 请求体丢失导致后端报「client必填」。
      */
-    const apiBase = useRuntimeConfig().public.apiBase
+    const runtimeConfig = useRuntimeConfig()
+    const apiBase = import.meta.server
+      ? (runtimeConfig.apiServerBase || runtimeConfig.public.apiBase)
+      : runtimeConfig.public.apiBase
     const url = import.meta.server ? apiBase + path : '/api' + path
 
     const timestamp = Math.floor(Date.now() / 1000)
@@ -143,7 +171,9 @@ export function useApi() {
       fetchOptions.query = allParams
       // GET 请求通过 server proxy 时，参数在 query 里
       const finalUrl = url + (queryStr ? '?' + queryStr : '')
-      const result = await $fetch(finalUrl, fetchOptions)
+      const result = import.meta.server
+        ? await fetchJson(finalUrl, fetchOptions)
+        : await $fetch(finalUrl, fetchOptions)
       return handleResult(result)
     } else {
       // POST: body 为 x-www-form-urlencoded
@@ -154,7 +184,9 @@ export function useApi() {
       })
       fetchOptions.body = new URLSearchParams(postBody).toString()
 
-      const result = await $fetch(url, fetchOptions)
+      const result = import.meta.server
+        ? await fetchJson(url, fetchOptions)
+        : await $fetch(url, fetchOptions)
       return handleResult(result)
     }
   }
diff --git a/ecosystem.config.cjs b/ecosystem.config.cjs
index b08be09..a346e34 100644
--- a/ecosystem.config.cjs
+++ b/ecosystem.config.cjs
@@ -2,13 +2,15 @@ const appName = process.env.APP_NAME || 'pc_nuxt'
 const host = process.env.HOST || '0.0.0.0'
 const port = process.env.PORT || '6888'
 const apiBase = process.env.NUXT_PUBLIC_API_BASE || 'https://api.aionline.cc'
+const apiServerBase = process.env.NUXT_API_SERVER_BASE || apiBase
 const env = {
   NODE_ENV: 'production',
   HOST: host,
   PORT: port,
   NITRO_HOST: host,
   NITRO_PORT: port,
-  NUXT_PUBLIC_API_BASE: apiBase
+  NUXT_PUBLIC_API_BASE: apiBase,
+  NUXT_API_SERVER_BASE: apiServerBase
 }
 
 module.exports = {
diff --git a/nuxt.config.js b/nuxt.config.js
index 8c2eb20..7983330 100644
--- a/nuxt.config.js
+++ b/nuxt.config.js
@@ -36,11 +36,28 @@ function resolveApiBase() {
   return value
 }
 
+function resolveServerApiBase() {
+  const value = String(process.env.NUXT_API_SERVER_BASE || apiBase).trim().replace(/\/+$/, '')
+  let url
+  try {
+    url = new URL(value)
+  } catch {
+    throw new Error(`[pc_nuxt] NUXT_API_SERVER_BASE 不是有效 URL：${value || '(empty)'}`)
+  }
+
+  if (!['http:', 'https:'].includes(url.protocol)) {
+    throw new Error(`[pc_nuxt] NUXT_API_SERVER_BASE 仅支持 http/https：${value}`)
+  }
+
+  return value
+}
+
 if (process.env.API_BASE && !process.env.NUXT_PUBLIC_API_BASE) {
   console.warn('[pc_nuxt] API_BASE 已废弃，请改用 NUXT_PUBLIC_API_BASE')
 }
 
 const apiBase = resolveApiBase()
+const apiServerBase = resolveServerApiBase()
 
 // https://nuxt.com/docs/api/configuration/nuxt-config
 export default defineNuxtConfig({
@@ -72,6 +89,8 @@ export default defineNuxtConfig({
 
   // 运行时公开配置（客户端可访问）
   runtimeConfig: {
+    // 服务端 SSR / Nitro 代理专用后端地址。可设为 http://127.0.0.1:16888，避免服务端回打公网域名。
+    apiServerBase,
     public: {
       // ThinkJS ai_api 地址，按环境覆盖
       apiBase,
diff --git a/restart.sh b/restart.sh
index b28a201..f951a61 100644
--- a/restart.sh
+++ b/restart.sh
@@ -9,9 +9,11 @@ set -Eeuo pipefail
 APP_NAME="${APP_NAME:-pc_nuxt}"
 BRANCH="${BRANCH:-}"
 NUXT_PUBLIC_API_BASE="${NUXT_PUBLIC_API_BASE:-https://api.aionline.cc}"
+NUXT_API_SERVER_BASE="${NUXT_API_SERVER_BASE:-$NUXT_PUBLIC_API_BASE}"
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
 export NUXT_PUBLIC_API_BASE
+export NUXT_API_SERVER_BASE
 
 cd "$SCRIPT_DIR"
 
@@ -53,6 +55,23 @@ if (!['http:', 'https:'].includes(url.protocol) || isPrivate) {
 NODE
 }
 
+validate_server_api_base() {
+  node - "$NUXT_API_SERVER_BASE" <<'NODE'
+const value = process.argv[2]
+let url
+try {
+  url = new URL(value)
+} catch {
+  console.error(`[pc_nuxt] Invalid NUXT_API_SERVER_BASE: ${value || '(empty)'}`)
+  process.exit(1)
+}
+if (!['http:', 'https:'].includes(url.protocol)) {
+  console.error(`[pc_nuxt] NUXT_API_SERVER_BASE must be http(s): ${value}`)
+  process.exit(1)
+}
+NODE
+}
+
 validate_tls_security() {
   if [ "${NODE_TLS_REJECT_UNAUTHORIZED:-}" = "0" ]; then
     log "Refusing deployment: NODE_TLS_REJECT_UNAUTHORIZED=0 disables TLS certificate verification."
@@ -110,6 +129,7 @@ main() {
   require_command pm2
   validate_tls_security
   validate_api_base
+  validate_server_api_base
   resolve_branch
 
   log "Deploy start: $APP_NAME"
@@ -117,6 +137,7 @@ main() {
   log "pnpm: $(pnpm -v)"
   log "pm2: $(pm2 -v)"
   log "API: $NUXT_PUBLIC_API_BASE"
+  log "Server API: $NUXT_API_SERVER_BASE"
 
   sync_latest_code
   install_dependencies
diff --git a/server/api/[...].js b/server/api/[...].js
index c555f5b..1d04e98 100644
--- a/server/api/[...].js
+++ b/server/api/[...].js
@@ -12,9 +12,25 @@
  */
 import { proxyRequest, sendWebResponse } from 'h3'
 
+async function parseUpstreamResponse(response) {
+  const contentType = response.headers.get('content-type') || ''
+  const text = await response.text()
+
+  if (contentType.includes('application/json')) {
+    return text ? JSON.parse(text) : {}
+  }
+
+  if (!text) return {}
+  try {
+    return JSON.parse(text)
+  } catch {
+    return text
+  }
+}
+
 export default defineEventHandler(async (event) => {
   const config = useRuntimeConfig(event)
-  const apiBase = String(config.public.apiBase || '').replace(/\/+$/, '')
+  const apiBase = String(config.apiServerBase || config.public.apiBase || '').replace(/\/+$/, '')
   if (!apiBase) {
     throw createError({
       statusCode: 500,
@@ -83,7 +99,8 @@ export default defineEventHandler(async (event) => {
       const upstreamResponse = await fetch(fullUrl, fetchOptions)
       return sendWebResponse(event, upstreamResponse)
     }
-    return await $fetch(fullUrl, fetchOptions)
+    const upstreamResponse = await fetch(fullUrl, fetchOptions)
+    return await parseUpstreamResponse(upstreamResponse)
   } catch (error) {
     console.error('[Server Proxy Error]', url, error.message)
     return {