新增 logo、優化 AI 問答

app/page.tsx

@@ -479,8 +479,12 @@ export default function AIShowcasePlatform() {
           <div className="flex items-center justify-between h-16">
             <div className="flex items-center space-x-4">
               <div className="flex items-center space-x-2 cursor-pointer" onClick={() => setShowCompetition(false)}>
-                <div className="w-8 h-8 bg-gradient-to-r from-blue-600 to-purple-600 rounded-lg flex items-center justify-center">
-                  <Brain className="w-5 h-5 text-white" />
+                <div className="h-8 rounded-lg flex items-center justify-center">
+                  <img 
+                    src="/logo.png" 
+                    alt="強茂集團 AI 展示平台" 
+                    className="h-8 object-contain"
+                  />
                 </div>
                 <div>
                   <h1 className="text-xl font-bold text-gray-900">強茂集團 AI 展示平台</h1>