diff --git a/assets/css/common/post-single.css b/assets/css/common/post-single.css
index 9f9f479..486ad36 100644
--- a/assets/css/common/post-single.css
+++ b/assets/css/common/post-single.css
@@ -266,7 +266,8 @@
 
 .toc details summary {
     cursor: zoom-in;
-    margin-inline-start: 20px;
+    margin-inline-start: 10px;
+    user-select: none;
 }
 
 .toc details[open] summary {
@@ -279,8 +280,9 @@
 }
 
 .toc .inner {
-    margin: 0 20px;
-    padding: 10px 20px;
+    margin: 5px 20px 0;
+    padding: 0 10px;
+    opacity: 0.9;
 }
 
 .toc li ul {