diff --git a/layout/_partial/after-footer.ejs b/layout/_partial/after-footer.ejs
index 90fc783..548613b 100644
--- a/layout/_partial/after-footer.ejs
+++ b/layout/_partial/after-footer.ejs
@@ -16,11 +16,14 @@
     headingSelector: 'h1, h2, h3, h4, h5, h6',
     hasInnerContainers: true,
     scrollSmooth: true,
+    scrollContainer:'main',
     positionFixedSelector: '.tocbot',
     positionFixedClass: 'is-position-fixed',
     fixedSidebarOffset: 'auto',
     onClick: (e) => {
-      document.getElementById(e.target.innerText).scrollIntoView()
+      $('.toc-link').removeClass('is-active-link');
+      $(`a[href=${e.target.hash}]`).addClass('is-active-link');
+      $(e.target.hash).scrollIntoView();
       return false;
     }
   });
diff --git a/source/css/_partial/tocbot.styl b/source/css/_partial/tocbot.styl
index 14c0fe8..bdc642b 100644
--- a/source/css/_partial/tocbot.styl
+++ b/source/css/_partial/tocbot.styl
@@ -1,6 +1,6 @@
 
 .tocbot
-  position fixed
+  position absolute
   top 14rem
   left calc((100vw - 70rem) / 2 + 70rem)
   font-size 80%
@@ -47,3 +47,9 @@ a.toc-link
   margin-top -1px
   position absolute
   width 2px
+
+.is-active-link::before
+  background-color sea-blue
+
+.is-active-link
+  font-weight 700
\ No newline at end of file