diff --git a/themes/Ying/assets/js/modules/mypjax.js b/themes/Ying/assets/js/modules/mypjax.js
index 4791ff5c..7a0e47b0 100644
--- a/themes/Ying/assets/js/modules/mypjax.js
+++ b/themes/Ying/assets/js/modules/mypjax.js
@@ -94,21 +94,25 @@ document.addEventListener("pjax:success", function () {
 });
 
 // pjax加载完成
+// 代码折叠初始化 — 独立监听器，确保不被其他初始化错误影响
+document.addEventListener("pjax:complete", function () {
+    setTimeout(function() {
+        if (typeof window.initCodeFold === 'function') window.initCodeFold();
+    }, 200);
+});
+
 document.addEventListener("pjax:complete", function () {
     // pjax完成动画
     if (typeof NProgress !== 'undefined') {
         NProgress.done();
     }
-    
+
     // 重载一些js样式调整
     pjax_reload();
-    
+
     // 初始化代码复制
     if (typeof initCodeCopy === 'function') initCodeCopy();
-    
-    // 初始化代码折叠
-    if (typeof initCodeFold === 'function') initCodeFold();
-    
+
     // 初始化段落评论
     if (typeof window.initParagraphComments === 'function') {
         try {
diff --git a/themes/Ying/assets/js/modules/utils.js b/themes/Ying/assets/js/modules/utils.js
index 9aaa66fa..e84bf0f2 100644
--- a/themes/Ying/assets/js/modules/utils.js
+++ b/themes/Ying/assets/js/modules/utils.js
@@ -88,9 +88,9 @@ window.initCodeFold = function() {
         var pre = block.querySelector('pre');
         if (!pre) return;
 
-        // Use pre's content height; 0 means layout not ready, wrap conservatively
+        // Use pre's content height; 0 means layout not ready, skip
         var contentHeight = pre.scrollHeight || block.scrollHeight;
-        if (contentHeight && contentHeight <= 360) return;
+        if (!contentHeight || contentHeight <= 360) return;
 
         var wrapper = document.createElement('div');
         wrapper.className = 'code-fold-container collapsed';
@@ -137,7 +137,7 @@ window.initCodeCopy = function() {
         pre.addEventListener('mouseenter', function() { btn.style.opacity = '1'; });
         pre.addEventListener('mouseleave', function() { btn.style.opacity = '0'; });
 
-        if (window.isMobile()) { btn.style.opacity = '1'; }
+        if (typeof window.isMobile === 'function' && window.isMobile()) { btn.style.opacity = '1'; }
 
         btn.addEventListener('click', function(e) {
             e.stopPropagation();