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+<!doctype html>
+<html lang="zh-CN">
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width,initial-scale=1" />
+  <title>Demo - 主页</title>
+  <link rel="stylesheet" href="/static/css/style.css">
+</head>
+<body>
+  <main class="container">
+    <header>
+      <h1>Demo 应用</h1>
+    </header>
+
+    <section id="content">
+      <p id="greeting">正在检查登录状态……</p>
+      <div id="actions"></div>
+    </section>
+  </main>
+  <script>
+    // 简单客户端令牌检查
+    const token = localStorage.getItem('demo_auth_token');
+    const greeting = document.getElementById('greeting');
+    const actions = document.getElementById('actions');
+
+    if (token) {
+      greeting.textContent = '欢迎，已登录用户！';
+      const logoutBtn = document.createElement('button');
+      logoutBtn.textContent = '退出登录';
+      logoutBtn.onclick = () => {
+        localStorage.removeItem('demo_auth_token');
+        location.reload();
+      };
+      actions.appendChild(logoutBtn);
+    } else {
+      greeting.innerHTML = '你还未登录。前往 <a href="/login.html">登录页面</a>。';
+    }
+  </script>
+</body>
+</html>
