diff --git a/src/components/Widgets/TOC.astro b/src/components/Widgets/TOC.astro
index c9ce93c..4f36b2b 100644
--- a/src/components/Widgets/TOC.astro
+++ b/src/components/Widgets/TOC.astro
@@ -201,7 +201,7 @@ function setupTOCHighlight() {
 
   // Create the intersection observer
   const headingObserver = new IntersectionObserver(intersectionCallback, {
-    rootMargin: '-5% 0% -85% 0%',
+    rootMargin: '0% 0% -66% 0%',
     threshold: [0.4],
   })