diff --git a/.env.example b/.env.example
index ead5522..6203304 100644
--- a/.env.example
+++ b/.env.example
@@ -1,7 +1,8 @@
 # Legacy development-only .env.local example. Prefer config/development.local.env.
 # Development uses this configured backend; browsers call the current site's /api/app/*.
-# Test uses this same backend; production uses http://172.104.56.28:26125.
-UPSTREAM_API_URL=http://172.104.181.99:26792
+UPSTREAM_API_URL=https://webhgcapi.mfcg.me
+# Canonical site origin for SEO; overrides config/info foreverUrlAddr.
+NEXT_PUBLIC_SITE_URL=https://huangguoai.info
 # API_BASE_URL remains supported for existing local overrides.
 # Optional channel code passed when creating a guest account.
 API_CHANNEL=
diff --git a/config/development.env b/config/development.env
index ab6834d..bee73b5 100644
--- a/config/development.env
+++ b/config/development.env
@@ -2,6 +2,8 @@
 APP_ENV=development
 PORT=21030
 # Server-only Go API origin. Browser requests use the current site's /api/app/*.
-UPSTREAM_API_URL=http://172.104.181.99:26792
+UPSTREAM_API_URL=https://webhgcapi.mfcg.me
+# Canonical site origin for SEO (canonical, sitemap, robots, JSON-LD).
+NEXT_PUBLIC_SITE_URL=https://huangguoai.info
 API_CHANNEL=
 PUBLIC_DATA_CACHE_TTL_MS=0
diff --git a/config/production.env b/config/production.env
index 421089d..a05eed8 100644
--- a/config/production.env
+++ b/config/production.env
@@ -4,6 +4,8 @@ APP_ENV=production
 # 应用接口在 21040。不要写成 H5 的 21042，也不要写 127.0.0.1（H5 进程里不一定能连到本机 Go）。
 PORT=21042
 # Server-only Go API origin. Browser requests use the current site's /api/app/*.
-UPSTREAM_API_URL=http://139.162.49.252:21040
+UPSTREAM_API_URL=https://webhgcapi.mfcg.me
+# Canonical site origin for SEO (canonical, sitemap, robots, JSON-LD).
+NEXT_PUBLIC_SITE_URL=https://huangguoai.info
 API_CHANNEL=
 PUBLIC_DATA_CACHE_TTL_MS=60000
diff --git a/config/test.env b/config/test.env
index 4925cbb..4ad7e22 100644
--- a/config/test.env
+++ b/config/test.env
@@ -2,6 +2,8 @@
 APP_ENV=test
 PORT=21030
 # Server-only Go API origin. Browser requests use the current site's /api/app/*.
-UPSTREAM_API_URL=http://172.104.181.99:26792
+UPSTREAM_API_URL=https://webhgcapi.mfcg.me
+# Canonical site origin for SEO (canonical, sitemap, robots, JSON-LD).
+NEXT_PUBLIC_SITE_URL=https://huangguoai.info
 API_CHANNEL=
 PUBLIC_DATA_CACHE_TTL_MS=60000
diff --git a/next-env.d.ts b/next-env.d.ts
index ce4e94a..6936789 100644
--- a/next-env.d.ts
+++ b/next-env.d.ts
@@ -1,7 +1,7 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/types/routes.d.ts";
-import "./.next/types/root-params.d.ts";
+import "./.next-dev/dev/types/routes.d.ts";
+import "./.next-dev/dev/types/root-params.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.
diff --git a/src/lib/api/config.ts b/src/lib/api/config.ts
index 8153a4f..76da5e9 100644
--- a/src/lib/api/config.ts
+++ b/src/lib/api/config.ts
@@ -1,4 +1,4 @@
-export const DEFAULT_API_BASE_URL = 'http://172.104.181.99:26792';
+export const DEFAULT_API_BASE_URL = 'https://webhgcapi.mfcg.me';
 export const UPSTREAM_HOP_HEADER = 'x-jgdj-upstream';
 
 export interface ApiRequestContext {
@@ -7,9 +7,7 @@ export interface ApiRequestContext {
 }
 
 function configuredApiUrl(): string {
-  const environment = process.env.APP_ENV || (process.env.NODE_ENV === 'production' ? 'production' : 'development');
-  const fallback = environment === 'production' ? 'http://139.162.49.252:21040' : DEFAULT_API_BASE_URL;
-  return (process.env.UPSTREAM_API_URL ?? process.env.API_BASE_URL ?? fallback).trim();
+  return (process.env.UPSTREAM_API_URL ?? process.env.API_BASE_URL ?? DEFAULT_API_BASE_URL).trim();
 }
 
 export function usesCurrentApiOrigin(): boolean {
diff --git a/src/lib/seo.ts b/src/lib/seo.ts
index b6b183f..f6b168d 100644
--- a/src/lib/seo.ts
+++ b/src/lib/seo.ts
@@ -53,7 +53,7 @@ export function siteOrigin(value:unknown):string {
   }catch{return '';}
 }
 export function seoEnvironment(config:Config={},categories:NavigationCategory[]=[]):SeoEnvironment {
-  const origin=siteOrigin(config.config?.foreverUrlAddr)||siteOrigin(config.newAddressInfo?.foreverUrlAddr);
+  const origin=siteOrigin(process.env.NEXT_PUBLIC_SITE_URL)||siteOrigin(config.config?.foreverUrlAddr)||siteOrigin(config.newAddressInfo?.foreverUrlAddr);
   const channels={...config.newAddressInfo,...config.config};
   const sameAs=[...new Set([channels.twitterAddr,channels.tgGroup].map(value=>schemaUrl(value,origin)).filter(Boolean))];
   return {origin,site:normalizeSeo(config.seoInfo),navigation:normalizeSeo(config.seoNavInfo),categories:Array.isArray(categories)?categories.filter(item=>item&&typeof item==='object'):[],sameAs};
diff --git a/tests/api-config.test.mjs b/tests/api-config.test.mjs
index 533a063..7af073f 100644
--- a/tests/api-config.test.mjs
+++ b/tests/api-config.test.mjs
@@ -56,11 +56,11 @@ sharedDependencies["../site-navigation"] = await compile("../site-navigation", {
 test("development uses its configured domain and supports legacy overrides", () => {
   delete environment.UPSTREAM_API_URL;
   delete environment.API_BASE_URL;
-  assert.equal(config.getApiBaseUrl(), "http://172.104.181.99:26792");
+  assert.equal(config.getApiBaseUrl(), "https://webhgcapi.mfcg.me");
   environment.APP_ENV = "test";
-  assert.equal(config.getApiBaseUrl(), "http://172.104.181.99:26792");
+  assert.equal(config.getApiBaseUrl(), "https://webhgcapi.mfcg.me");
   environment.APP_ENV = "production";
-  assert.equal(config.getApiBaseUrl(), "http://139.162.49.252:21040");
+  assert.equal(config.getApiBaseUrl(), "https://webhgcapi.mfcg.me");
   delete environment.APP_ENV;
   environment.API_BASE_URL = "https://legacy-api.example/";
   assert.equal(config.getApiBaseUrl(), "https://legacy-api.example");
diff --git a/tests/environment.test.mjs b/tests/environment.test.mjs
index 44aa63a..7e0588a 100644
--- a/tests/environment.test.mjs
+++ b/tests/environment.test.mjs
@@ -277,8 +277,8 @@ test("project profiles and Next configuration keep the requested API and port wi
     assert.equal(
       command.env.UPSTREAM_API_URL,
       environment === "production"
-        ? "http://139.162.49.252:21040"
-        : "http://172.104.181.99:26792",
+        ? "https://webhgcapi.mfcg.me"
+        : "https://webhgcapi.mfcg.me",
     );
     assert.equal(command.env.API_BASE_URL, command.env.UPSTREAM_API_URL);
     assert.equal(