diff --git a/pages/index/index.js b/pages/index/index.js
index 7dec3b1..8f8d15c 100644
--- a/pages/index/index.js
+++ b/pages/index/index.js
@@ -139,24 +139,24 @@ Page({
     const moveY = e.touches[0].clientY;
     const diffY = moveY - this.data.startY;
     
-    // 如果移动距离超过20px，视为拖动
     if (Math.abs(diffY) > 20) {
       this.setData({
         isDragging: true
       });
       
-      // 更新按钮位置
-      let newTop = this.data.sidebarBtnTop + diffY * 2; // 转换为rpx
+      let newTop = this.data.sidebarBtnTop + diffY * 3;
       
-      // 限制按钮在屏幕范围内
-      const screenHeight = wx.getSystemInfoSync().screenHeight * 2; // 转换为rpx
-      const btnHeight = 180; // 按钮高度，单位rpx
-      const boundary = 300; // 边界值，限制拖动范围
+      const systemInfo = wx.getSystemInfoSync();
+      const screenHeight = systemInfo.screenHeight * 2;
+      const btnHeight = 90;
       
-      if (newTop < boundary) {
-        newTop = boundary;
-      } else if (newTop > screenHeight - btnHeight - boundary) {
-        newTop = screenHeight - btnHeight - boundary;
+      const minTop = screenHeight * 0.2;
+      const maxTop = screenHeight * 0.6;
+      
+      if (newTop < minTop) {
+        newTop = minTop;
+      } else if (newTop > maxTop) {
+        newTop = maxTop;
       }
       
       this.setData({
@@ -193,12 +193,22 @@ Page({
     console.log('首页初始化')
     const savedBtnTop = wx.getStorageSync('sidebarBtnTop');
     const savedBtnHidden = wx.getStorageSync('sidebarBtnHidden');
-    if (savedBtnTop !== '') {
-      this.setData({
-        sidebarBtnTop: savedBtnTop,
-        sidebarBtnHidden: savedBtnHidden || false
-      });
+    const systemInfo = wx.getSystemInfoSync();
+    const screenHeight = systemInfo.screenHeight * 2;
+    
+    let defaultTop = screenHeight * 0.5;
+    if (savedBtnTop !== '' && savedBtnTop !== -100) {
+      const minTop = screenHeight * 0.2;
+      const maxTop = screenHeight * 0.6;
+      if (savedBtnTop >= minTop && savedBtnTop <= maxTop) {
+        defaultTop = savedBtnTop;
+      }
     }
+    
+    this.setData({
+      sidebarBtnTop: defaultTop,
+      sidebarBtnHidden: savedBtnHidden || false
+    });
     this.checkAndRestoreLoginStatus()
     this.loadGoods()
   },
@@ -212,9 +222,21 @@ Page({
     const app = getApp();
     app.updateCurrentTab('index');
     app.globalData.showTabBar = true;
+    
+    const savedBtnHidden = wx.getStorageSync('sidebarBtnHidden');
+    this.setData({
+      sidebarBtnHidden: savedBtnHidden || false
+    });
+    
     this.checkAndRestoreLoginStatus()
   },
 
+  onHide: function () {
+    this.setData({
+      sidebarBtnHidden: true
+    });
+  },
+
   onPullDownRefresh: function() {
     this.onRefresh()
   },
@@ -767,6 +789,9 @@ Page({
 
   // 跳转到招商合作页面
   navigateToCooperation: function() {
+    this.setData({
+      sidebarBtnHidden: true
+    });
     wx.navigateTo({
       url: '/pages/cooperation/index'
     })
diff --git a/pages/index/index.wxml b/pages/index/index.wxml
index 957e915..5ac2070 100644
--- a/pages/index/index.wxml
+++ b/pages/index/index.wxml
@@ -109,7 +109,7 @@
     
     <!-- 箭头按钮 -->
     <view class="sidebar-arrow" bindtap="toggleSidebarBtn">
-      <text class="arrow-icon {{sidebarBtnHidden ? 'arrow-right' : 'arrow-left'}}">▶</text>
+      <text class="arrow-icon {{sidebarBtnHidden ? 'arrow-right' : 'arrow-left'}}">《</text>
     </view>
   </view>
   
diff --git a/pages/index/index.wxss b/pages/index/index.wxss
index c3cd2af..3618a7f 100644
--- a/pages/index/index.wxss
+++ b/pages/index/index.wxss
@@ -25,26 +25,28 @@ page {
   padding: 10rpx 0;
   margin-bottom: 20rpx;
   overflow: hidden;
-  transition: opacity 0.4s ease-in-out, transform 0.4s ease-in-out;
-  -webkit-transition: opacity 0.4s ease-in-out, -webkit-transform 0.4s ease-in-out;
+  transition: opacity 0.4s ease-in-out, transform 0.4s ease-in-out, visibility 0.4s ease-in-out;
+  -webkit-transition: opacity 0.4s ease-in-out, -webkit-transform 0.4s ease-in-out, visibility 0.4s ease-in-out;
   will-change: opacity, transform;
   opacity: 1;
   transform: translateY(0);
   -webkit-transform: translateY(0);
-  /* 使用固定高度，避免iOS系统重新计算布局 */
-  height: 180rpx;
+  visibility: visible;
+  height: auto;
+  /* 固定高度，避免iOS上的布局抖动 */
+  min-height: 160rpx;
 }
 
-/* 顶部搜索区域完全隐藏状态 - 使用transform隐藏，避免影响页面布局 */
+/* 顶部搜索区域完全隐藏状态 - 用于平滑收缩高度 */
 .top-hidden {
-  pointer-events: none;
   opacity: 0;
-  /* 使用transform将搜索区域移出视口，而不是改变高度 */
   transform: translateY(-100%);
   -webkit-transform: translateY(-100%);
-  /* 保留固定高度，避免页面布局变化 */
-  height: 180rpx;
-  /* 保留padding和margin，避免页面布局变化 */
+  pointer-events: none;
+  visibility: hidden;
+  /* 保持高度不变，避免iOS上的布局抖动 */
+  height: auto;
+  min-height: 160rpx;
   padding: 10rpx 0;
   margin-bottom: 20rpx;
 }