diff --git a/振幅锁仓策略/index-FG.html b/振幅锁仓策略/index-FG.html
index 18eaa00..1fc0ef5 100644
--- a/振幅锁仓策略/index-FG.html
+++ b/振幅锁仓策略/index-FG.html
@@ -182,10 +182,14 @@ function toggleSection(id) {
   document.getElementById(id).classList.toggle('collapsed');
 }
 function openSection(id) {
-  document.querySelectorAll('.section').forEach(function(s) { s.classList.add('collapsed'); });
   var el = document.getElementById(id);
-  el.classList.remove('collapsed');
-  el.scrollIntoView({ behavior: 'smooth', block: 'start' });
+  if (el.classList.contains('collapsed')) {
+    document.querySelectorAll('.section').forEach(function(s) { s.classList.add('collapsed'); });
+    el.classList.remove('collapsed');
+    el.scrollIntoView({ behavior: 'smooth', block: 'start' });
+  } else {
+    el.classList.add('collapsed');
+  }
 }
 
 var activeRow = null;
diff --git a/振幅锁仓策略/index-SA.html b/振幅锁仓策略/index-SA.html
index 776d777..8e42d80 100644
--- a/振幅锁仓策略/index-SA.html
+++ b/振幅锁仓策略/index-SA.html
@@ -182,10 +182,14 @@ function toggleSection(id) {
   document.getElementById(id).classList.toggle('collapsed');
 }
 function openSection(id) {
-  document.querySelectorAll('.section').forEach(function(s) { s.classList.add('collapsed'); });
   var el = document.getElementById(id);
-  el.classList.remove('collapsed');
-  el.scrollIntoView({ behavior: 'smooth', block: 'start' });
+  if (el.classList.contains('collapsed')) {
+    document.querySelectorAll('.section').forEach(function(s) { s.classList.add('collapsed'); });
+    el.classList.remove('collapsed');
+    el.scrollIntoView({ behavior: 'smooth', block: 'start' });
+  } else {
+    el.classList.add('collapsed');
+  }
 }
 
 var activeRow = null;