diff --git a/Zhihu-Enhanced.user.js b/Zhihu-Enhanced.user.js
index a1ff645..56668bd 100644
--- a/Zhihu-Enhanced.user.js
+++ b/Zhihu-Enhanced.user.js
@@ -24,7 +24,7 @@
 'use strict';
 var menu_ALL = [
     ['menu_defaultCollapsedAnswer', '默认收起回答', '默认收起回答', true],
-    ['menu_collapsedAnswer', '一键收起回答', '一键收起回答', true],
+    ['menu_collapsedAnswer', '一键收起回答', '一键收起回答', false],
     ['menu_collapsedNowAnswer', '收起当前回答/评论（点击两侧空白处）', '收起当前回答/评论', true],
     ['menu_backToTop', '快捷回到顶部（右键两侧空白处）', '快捷回到顶部', true],
     ['menu_blockUsers', '屏蔽指定用户', '屏蔽指定用户', true],
@@ -108,14 +108,22 @@ function defaultCollapsedAnswer() {
 }
 
 
-// 一键收起回答
+// 一键收起回答（全部）
 function collapsedAnswer() {
     if (!menu_value('menu_collapsedAnswer')) return
     if (document.querySelector('.CornerAnimayedFlex')) {
         document.head.appendChild(document.createElement('style')).textContent = '.CornerButton{margin-bottom:8px !important;}.CornerButtons{bottom:45px !important;}';
-        document.querySelector('.CornerAnimayedFlex').insertAdjacentHTML('afterBegin', '<button id="collapsed-button" data-tooltip="收起回答" data-tooltip-position="left" data-tooltip-will-hide-on-click="false" aria-label="收起回答" type="button" class="Button CornerButton Button--plain"><svg class="ContentItem-arrowIcon is-active" aria-label="收起回答" fill="currentColor" viewBox="0 0 24 24" width="24" height="24"><path d="M16.036 19.59a1 1 0 0 1-.997.995H9.032a.996.996 0 0 1-.997-.996v-7.005H5.03c-1.1 0-1.36-.633-.578-1.416L11.33 4.29a1.003 1.003 0 0 1 1.412 0l6.878 6.88c.782.78.523 1.415-.58 1.415h-3.004v7.005z"></path></svg></button>');
+        document.querySelector('.CornerAnimayedFlex').insertAdjacentHTML('afterBegin', '<button id="collapsed-button" data-tooltip="收起全部回答" data-tooltip-position="left" data-tooltip-will-hide-on-click="false" aria-label="收起全部回答" type="button" class="Button CornerButton Button--plain"><svg class="ContentItem-arrowIcon is-active" aria-label="收起全部回答" fill="currentColor" viewBox="0 0 24 24" width="24" height="24"><path d="M16.036 19.59a1 1 0 0 1-.997.995H9.032a.996.996 0 0 1-.997-.996v-7.005H5.03c-1.1 0-1.36-.633-.578-1.416L11.33 4.29a1.003 1.003 0 0 1 1.412 0l6.878 6.88c.782.78.523 1.415-.58 1.415h-3.004v7.005z"></path></svg></button>');
         document.getElementById('collapsed-button').onclick = function () {
-            document.querySelectorAll('.ContentItem-rightButton[data-zop-retract-question]').forEach(function (el) {el.click()});
+            document.querySelectorAll('.RichContent').forEach(function (el) {
+                if (el.querySelector('.RichContent-inner').offsetHeight > 400) {
+                    const button = el.querySelector('.ContentItem-rightButton[data-zop-retract-question]')
+                    if (button) {
+                        el._defaultCollapsed = true
+                        button.click()
+                    }
+                }
+            });
         }
     }
 }