diff --git a/static/hub.css b/static/hub.css
index 43902eb..98b424c 100644
--- a/static/hub.css
+++ b/static/hub.css
@@ -169,16 +169,11 @@ a:hover { color: #7dd3fc; }
 .nav-spot--flat .nav-spot-last,
 .nav-spot--flat .nav-spot-chg,
 .nav-spot--flat .nav-spot-pct { color: #9aa3bf; }
-.topbar-actions {
+.topbar-logout {
   position: fixed;
   top: 16px;
   right: 22px;
   z-index: 20;
-  display: flex;
-  align-items: center;
-  gap: 10px;
-}
-.topbar-logout {
   color: var(--muted);
   font-size: 0.82rem;
   letter-spacing: 0.04em;
@@ -186,39 +181,6 @@ a:hover { color: #7dd3fc; }
 .topbar-logout:hover {
   color: #e8f1ff;
 }
-.topbar-install {
-  appearance: none;
-  border: 1px solid #304164;
-  background: #151a2a;
-  color: #dbe4ff;
-  font-size: 0.78rem;
-  border-radius: 8px;
-  padding: 4px 10px;
-  cursor: pointer;
-  font-family: inherit;
-}
-.topbar-install:hover {
-  color: #ffffff;
-  border-color: #3d5278;
-}
-.topbar-install-hint {
-  position: fixed;
-  top: 46px;
-  right: 22px;
-  z-index: 20;
-  margin: 0;
-  max-width: min(360px, calc(100vw - 40px));
-  color: var(--muted);
-  font-size: 0.75rem;
-  line-height: 1.4;
-  text-align: right;
-}
-@media (display-mode: standalone) {
-  .topbar-install,
-  .topbar-install-hint {
-    display: none !important;
-  }
-}
 @media (max-width: 1100px) {
   .topbar-row {
     grid-template-columns: 1fr;
diff --git a/static/hub_pwa.js b/static/hub_pwa.js
index de3a6e7..3dfb5ee 100644
--- a/static/hub_pwa.js
+++ b/static/hub_pwa.js
@@ -1,89 +1,7 @@
 (function (global) {
-  var deferredPrompt = null;
-
-  function isStandalone() {
-    return (
-      (global.matchMedia && global.matchMedia("(display-mode: standalone)").matches) ||
-      global.navigator.standalone === true
-    );
-  }
-
-  function btn() {
-    return document.getElementById("hub-install-btn");
-  }
-
-  function setHint(msg) {
-    var el = document.getElementById("hub-install-hint");
-    if (el) el.textContent = msg || "";
-  }
-
-  function showInstall() {
-    var el = btn();
-    if (!el || isStandalone()) return;
-    el.hidden = false;
-  }
-
-  function hideInstall() {
-    var el = btn();
-    if (el) el.hidden = true;
-    setHint("");
-  }
-
-  function downloadShortcut() {
-    var origin = global.location.origin;
-    var body = "[InternetShortcut]\r\nURL=" + origin + "/\r\n";
-    var blob = new Blob([body], { type: "application/internet-shortcut" });
-    var a = document.createElement("a");
-    a.href = URL.createObjectURL(blob);
-    a.download = "期权中控.url";
-    document.body.appendChild(a);
-    a.click();
-    a.remove();
-    setTimeout(function () {
-      URL.revokeObjectURL(a.href);
-    }, 1000);
-  }
-
-  async function onInstallClick() {
-    setHint("");
-    if (deferredPrompt) {
-      deferredPrompt.prompt();
-      try {
-        var choice = await deferredPrompt.userChoice;
-        deferredPrompt = null;
-        if (choice && choice.outcome === "accepted") {
-          hideInstall();
-          return;
-        }
-      } catch (e) {
-        deferredPrompt = null;
-      }
-    }
-    downloadShortcut();
-    setHint("已下载快捷方式，拖到桌面即可。Chrome / Edge 也可在地址栏右侧点「安装」。");
-  }
-
   function boot() {
-    if (isStandalone()) {
-      hideInstall();
-      return;
-    }
-    showInstall();
-    global.addEventListener("beforeinstallprompt", function (ev) {
-      ev.preventDefault();
-      deferredPrompt = ev;
-      showInstall();
-    });
-    global.addEventListener("appinstalled", function () {
-      deferredPrompt = null;
-      hideInstall();
-    });
-    var el = btn();
-    if (el) el.addEventListener("click", onInstallClick);
-    if ("serviceWorker" in navigator) {
-      navigator.serviceWorker.register("/sw.js", { scope: "/" }).catch(function () {});
-    }
+    if (!("serviceWorker" in navigator)) return;
+    navigator.serviceWorker.register("/sw.js", { scope: "/" }).catch(function () {});
   }
-
   global.HubPwa = { boot: boot };
 })(window);
diff --git a/templates/base.html b/templates/base.html
index 37a3296..852adcf 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -11,16 +11,12 @@
   <link rel="icon" href="{{ url_for('static', filename='icons/favicon.ico') }}?v=2" sizes="any">
   <link rel="apple-touch-icon" href="{{ url_for('static', filename='icons/apple-touch-icon.png') }}?v=2">
   <link rel="manifest" href="/manifest.webmanifest">
-  <link rel="stylesheet" href="{{ url_for('static', filename='hub.css') }}?v=37">
+  <link rel="stylesheet" href="{{ url_for('static', filename='hub.css') }}?v=38">
 </head>
 <body class="{% if request.path.startswith('/login') %}page-login{% elif request.path.startswith('/desk') %}page-desk{% elif request.path.startswith('/stats') %}page-stats{% elif request.path.startswith('/instances') %}page-instances{% elif request.path.startswith('/settings') %}page-settings{% elif request.path.startswith('/cond_orders') %}page-cond-orders{% elif request.path == '/' %}page-dashboard{% endif %}">
-  <div class="topbar-actions">
-    <button type="button" class="topbar-install" id="hub-install-btn" hidden>安装到桌面</button>
-    {% if session.get('logged_in') %}
-    <a href="/logout" class="topbar-logout">退出</a>
-    {% endif %}
-  </div>
-  <p class="topbar-install-hint" id="hub-install-hint"></p>
+  {% if session.get('logged_in') %}
+  <a href="/logout" class="topbar-logout">退出</a>
+  {% endif %}
   <main class="main">
     {% if session.get('logged_in') %}
     <a href="/" class="topbar-brand">加密货币｜OKX 期权中控</a>
@@ -65,7 +61,7 @@
   {% if session.get('logged_in') and not request.path.startswith('/desk') %}
   <script>if (window.HubQuotes) HubQuotes.boot();</script>
   {% endif %}
-  <script src="{{ url_for('static', filename='hub_pwa.js') }}?v=1"></script>
+  <script src="{{ url_for('static', filename='hub_pwa.js') }}?v=2"></script>
   <script>if (window.HubPwa) HubPwa.boot();</script>
 </body>
 </html>