diff --git a/app/gateway-status.tsx b/app/gateway-status.tsx
index dd8f1e1..01a4bc3 100644
--- a/app/gateway-status.tsx
+++ b/app/gateway-status.tsx
@@ -3,6 +3,15 @@
 import { useEffect, useState, useCallback } from "react";
 import { useI18n } from "@/lib/i18n";
 
+function resolveGatewayUrl(url?: string): string | undefined {
+  if (!url || typeof window === "undefined") return url;
+  try {
+    const parsed = new URL(url);
+    if (parsed.hostname === "localhost") parsed.hostname = window.location.hostname;
+    return parsed.toString();
+  } catch { return url; }
+}
+
 interface HealthResult {
   ok: boolean;
   error?: string;
@@ -31,7 +40,7 @@ export function GatewayStatus() {
   return (
     <div className="relative inline-flex items-center gap-2">
       <a
-        href={health?.ok && health.webUrl ? health.webUrl : undefined}
+        href={health?.ok && health.webUrl ? resolveGatewayUrl(health.webUrl) : undefined}
         target="_blank"
         rel="noopener noreferrer"
         className="inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium border bg-cyan-500/20 text-cyan-300 border-cyan-500/30 hover:bg-cyan-500/30 transition-colors cursor-pointer"
diff --git a/app/page.tsx b/app/page.tsx
index 5242e56..2fa3639 100644
--- a/app/page.tsx
+++ b/app/page.tsx
@@ -2,6 +2,7 @@
 
 import { useEffect, useState, useCallback, useRef } from "react";
 import { useI18n } from "@/lib/i18n";
+import { buildGatewayUrl } from "@/lib/gateway-url";
 import { GatewayStatus } from "./gateway-status";
 
 interface Platform {
@@ -186,8 +187,8 @@ function PlatformBadge({ platform, agentId, gatewayPort, gatewayToken, t, testRe
   } else {
     sessionKey = `agent:${agentId}:main`;
   }
-  let sessionUrl = `http://localhost:${gatewayPort}/chat?session=${encodeURIComponent(sessionKey)}`;
-  if (gatewayToken) sessionUrl += `&token=${encodeURIComponent(gatewayToken)}`;
+  let sessionUrl = buildGatewayUrl(gatewayPort, "/chat", { session: sessionKey });
+  if (gatewayToken) sessionUrl = buildGatewayUrl(gatewayPort, "/chat", { session: sessionKey, token: gatewayToken });
 
   const badgeStyle = pName === "feishu"
     ? "bg-blue-500/20 text-blue-300 border border-blue-500/30 hover:bg-blue-500/40 hover:border-blue-400"
@@ -321,8 +322,8 @@ function AgentStatusBadge({ state, t }: { state?: string; t: TFunc }) {
 // Agent 卡片
 function AgentCard({ agent, gatewayPort, gatewayToken, t, testResult, platformTestResults, sessionTestResult, agentState, dmSessionResults, providerAccessModeMap }: { agent: Agent; gatewayPort: number; gatewayToken?: string; t: TFunc; testResult?: { ok: boolean; text?: string; error?: string; elapsed: number } | null; platformTestResults?: Record<string, PlatformTestResult | null>; sessionTestResult?: { ok: boolean; reply?: string; error?: string; elapsed: number } | null; agentState?: string; dmSessionResults?: Record<string, PlatformTestResult | null>; providerAccessModeMap?: Record<string, "auth" | "api_key"> }) {
   const sessionKey = `agent:${agent.id}:main`;
-  let sessionUrl = `http://localhost:${gatewayPort}/chat?session=${encodeURIComponent(sessionKey)}`;
-  if (gatewayToken) sessionUrl += `&token=${encodeURIComponent(gatewayToken)}`;
+  let sessionUrl = buildGatewayUrl(gatewayPort, "/chat", { session: sessionKey });
+  if (gatewayToken) sessionUrl = buildGatewayUrl(gatewayPort, "/chat", { session: sessionKey, token: gatewayToken });
   const modelProvider = agent.model.includes("/") ? agent.model.split("/", 1)[0] : "default";
   const modelAccessMode = providerAccessModeMap?.[modelProvider];
 
diff --git a/app/pixel-office/page.tsx b/app/pixel-office/page.tsx
index 62e438c..ef002ff 100644
--- a/app/pixel-office/page.tsx
+++ b/app/pixel-office/page.tsx
@@ -3,6 +3,7 @@
 import { useEffect, useRef, useState, useCallback } from 'react'
 import { OfficeState } from '@/lib/pixel-office/engine/officeState'
 import { renderFrame } from '@/lib/pixel-office/engine/renderer'
+import { buildGatewayUrl } from "@/lib/gateway-url"
 import type { EditorRenderState } from '@/lib/pixel-office/engine/renderer'
 import type { ContributionData } from '@/lib/pixel-office/engine/renderer'
 import { syncAgentsToOffice, AgentActivity } from '@/lib/pixel-office/agentBridge'
@@ -647,8 +648,8 @@ export default function PixelOfficePage() {
           // Click on PC — open gateway chat for main agent
           const gw = gatewayRef.current
           const sessionKey = 'agent:main:main'
-          let chatUrl = `http://localhost:${gw.port}/chat?session=${encodeURIComponent(sessionKey)}`
-          if (gw.token) chatUrl += `&token=${encodeURIComponent(gw.token)}`
+          let chatUrl = buildGatewayUrl(gw.port, '/chat', { session: sessionKey })
+          if (gw.token) chatUrl = buildGatewayUrl(gw.port, '/chat', { session: sessionKey, token: gw.token })
           window.open(chatUrl, '_blank')
         } else if (office.layout.furniture.some(f => {
           if (f.uid !== 'library-r') return false
diff --git a/app/sessions/page.tsx b/app/sessions/page.tsx
index cc459e7..fd900a6 100644
--- a/app/sessions/page.tsx
+++ b/app/sessions/page.tsx
@@ -3,6 +3,7 @@
 import { useEffect, useState, Suspense } from "react";
 import { useSearchParams } from "next/navigation";
 import Link from "next/link";
+import { buildGatewayUrl } from "@/lib/gateway-url";
 import { useI18n } from "@/lib/i18n";
 
 interface AgentInfo {
@@ -288,8 +289,8 @@ function SessionList({ agentId }: { agentId: string }) {
       <div className="space-y-3">
         {sessions.map((s) => {
           const typeInfo = getTypeLabel(s.type);
-          let chatUrl = `http://localhost:${gateway.port}/chat?session=${encodeURIComponent(s.key)}`;
-          if (gateway.token) chatUrl += `&token=${encodeURIComponent(gateway.token)}`;
+          let chatUrl = buildGatewayUrl(gateway.port, "/chat", { session: s.key });
+          if (gateway.token) chatUrl = buildGatewayUrl(gateway.port, "/chat", { session: s.key, token: gateway.token });
           return (
             <div
               key={s.key}
diff --git a/lib/gateway-url.ts b/lib/gateway-url.ts
new file mode 100644
index 0000000..a008bec
--- /dev/null
+++ b/lib/gateway-url.ts
@@ -0,0 +1,15 @@
+/**
+ * Build a gateway URL using the current browser hostname instead of
+ * hard-coded "localhost", so the dashboard works over LAN.
+ * Falls back to "localhost" during SSR.
+ */
+export function buildGatewayUrl(port: number, path: string, params?: Record<string, string>): string {
+  const host = typeof window !== "undefined" ? window.location.hostname : "localhost";
+  const url = new URL(`http://${host}:${port}${path}`);
+  if (params) {
+    for (const [k, v] of Object.entries(params)) {
+      if (v) url.searchParams.set(k, v);
+    }
+  }
+  return url.toString();
+}