diff --git a/振幅锁仓策略/index-FG.html b/振幅锁仓策略/index-FG.html
index 69db4d2..18eaa00 100644
--- a/振幅锁仓策略/index-FG.html
+++ b/振幅锁仓策略/index-FG.html
@@ -182,6 +182,7 @@ 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' });
diff --git a/振幅锁仓策略/index-SA.html b/振幅锁仓策略/index-SA.html
index f6fa90b..776d777 100644
--- a/振幅锁仓策略/index-SA.html
+++ b/振幅锁仓策略/index-SA.html
@@ -182,6 +182,7 @@ 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' });