diff --git a/js/login-gate.js b/js/login-gate.js
index 8a4621b..26fe004 100644
--- a/js/login-gate.js
+++ b/js/login-gate.js
@@ -105,17 +105,23 @@
   function page() {
     if (document.getElementById('homeBody')) return 'home';
     if (document.getElementById('wf')) return 'plaza';
-    return 'topic';
+    if (/\/topic\//.test(location.pathname)) return 'topic';
+    return 'other';
   }
+  /* 其他应用（数胎动、体重……）引本文件时自己指定：
+       window.MB_GATE_SEL = '.save-btn,.add-record';   点了要拦的按钮（CSS 选择器）
+       window.MB_GATE_IN  = '.note-input';             一聚焦就提示的输入框
+     或在自己的提交函数里：if (window.mbGate && mbGate.need()) return; */
+  function selFor(map, cus) { return window[cus] || map[page()] || ''; }
   document.addEventListener('click', function (e) {
     if (!G.out || !e.target.closest) return;
-    var s = SEL[page()];
+    var s = selFor(SEL, 'MB_GATE_SEL');
     if (s && e.target.closest(s)) G.need(e);
   }, true);
   /* 评论输入框：一点进去就提示（别让人打完一段字才发现发不出去） */
   document.addEventListener('focusin', function (e) {
     if (!G.out || !e.target.matches) return;
-    var s = IN[page()];
+    var s = selFor(IN, 'MB_GATE_IN');
     if (s && e.target.matches(s)) { e.target.blur(); prompt(); }
   }, true);
 })();