diff --git a/argontheme.js b/argontheme.js
index d968465..b1956d0 100644
--- a/argontheme.js
+++ b/argontheme.js
@@ -3710,18 +3710,10 @@ void 0;
         });
     }
 
-    // 7. 主题切换动画
+    // 7. 主题切换动画 - 已在 header.php 中通过 setDarkmode 函数处理，此处不再重复
     function initThemeTransition() {
-        var observer = new MutationObserver(function(mutations) {
-            mutations.forEach(function(mutation) {
-                if (mutation.attributeName === 'class') {
-                    var html = document.documentElement;
-                    html.classList.add('theme-transitioning');
-                    setTimeout(function() { html.classList.remove('theme-transitioning'); }, 300);
-                }
-            });
-        });
-        observer.observe(document.documentElement, { attributes: true, attributeFilter: ['class'] });
+        // 移除 MutationObserver 避免无限循环导致内存泄漏
+        // 主题切换过渡效果已在 setDarkmode() 函数中实现
     }
 
     // 8. 减少动画偏好检测
diff --git a/style.css b/style.css
index 19142b9..6847290 100644
--- a/style.css
+++ b/style.css
@@ -16327,7 +16327,6 @@ html.darkmode {
 @media (hover: hover) and (pointer: fine) {
     article.post.card {
         transition: transform var(--animation-normal) var(--ease-out-expo), box-shadow var(--animation-normal) var(--ease-standard);
-        will-change: transform, box-shadow;
     }
     article.post.card:hover {
         transform: translateY(-6px) scale(1.005);
@@ -16340,7 +16339,6 @@ html.darkmode {
     }
     article.post.card .post-thumbnail {
         transition: transform var(--animation-slow) var(--ease-out-expo);
-        will-change: transform;
     }
     article.post.card:hover .post-thumbnail {
         transform: scale(1.05);