diff --git a/application/views/mobile_first/ch.php b/application/views/mobile_first/ch.php
index de085112..8913c508 100644
--- a/application/views/mobile_first/ch.php
+++ b/application/views/mobile_first/ch.php
@@ -567,34 +567,40 @@ bottom: 75px;
 <div class="bottomlogo">© 1998-2026 Highlights Travel Co., Ltd. <br>All rights reserved. </div>
 </footer>
 
-<!--  <script>
+  <script>
     (function (w, d, i) {
-      function debounce(func, wait) {
+    function debounce(func, wait) {
         let timeout;
         return function () {
-          const context = this;
-          const args = arguments;
-          clearTimeout(timeout);
-          timeout = setTimeout(() => func.apply(context, args), wait);
+        const context = this;
+        const args = arguments;
+        clearTimeout(timeout);
+        timeout = setTimeout(() => func.apply(context, args), wait);
         };
-      }
+    }
 
-      var navbar = d.getElementById(i);
-      var prevScrollpos = w.pageYOffset;
-      w.onscroll = debounce(function () {
-        var currentScrollPos = w.pageYOffset;
-        if (Math.abs(currentScrollPos - prevScrollpos) > 5) { // 滚动阈值
-          if (prevScrollpos > currentScrollPos) {
+    const menuEl = document.getElementById("ml-menu");
+    const navbar = d.getElementById(i);
+    let prevScrollpos = w.pageYOffset;
+    w.onscroll = debounce(function () {
+        const isMenuOpen = menuEl.classList.contains("menu--open");
+        if (isMenuOpen) {
+        navbar.style.top = '0';
+        return; 
+        }
+        const currentScrollPos = w.pageYOffset;
+        if (Math.abs(currentScrollPos - prevScrollpos) > 5) {
+        if (prevScrollpos > currentScrollPos) {
             navbar.style.top = '0';
-          } else {
+        } else {
             navbar.style.top = '-100px';
-          }
-          prevScrollpos = currentScrollPos;
         }
-      }, 25) // 防止快速滚动时频繁触发
+        prevScrollpos = currentScrollPos;
+        }
+    }, 25);
     })(window, document, 'header');
   </script>
-  -->
+ 
   <script>/* memu js https://data.chinahighlights.com/js/mobile-menu.js */
     (function (window) { function classReg(className) { return new RegExp("(^|\\s+)" + className + "(\\s+|$)") } var hasClass, addClass, removeClass; if ("classList" in document.documentElement) { hasClass = function (elem, c) { return elem.classList.contains(c) }; addClass = function (elem, c) { elem.classList.add(c) }; removeClass = function (elem, c) { elem.classList.remove(c) } } else { hasClass = function (elem, c) { return classReg(c).test(elem.className) }; addClass = function (elem, c) { if (!hasClass(elem, c)) { elem.className = elem.className + " " + c } }; removeClass = function (elem, c) { elem.className = elem.className.replace(classReg(c), " ") } } function toggleClass(elem, c) { var fn = hasClass(elem, c) ? removeClass : addClass; fn(elem, c) } var classie = { hasClass: hasClass, addClass: addClass, removeClass: removeClass, toggleClass: toggleClass, has: hasClass, add: addClass, remove: removeClass, toggle: toggleClass }; if (typeof define === "function" && define.amd) { define(classie) } else { if (typeof exports === "object") { module.exports = classie } else { window.classie = classie } } })(window);
     !function (e, n, t) {