diff --git a/source/css/_common/components/comments.styl b/source/css/_common/components/comments.styl
new file mode 100644
index 0000000000..bf3edb945c
--- /dev/null
+++ b/source/css/_common/components/comments.styl
@@ -0,0 +1 @@
+.comments { margin: 60px 20px 0; }
diff --git a/source/css/_common/components/pages/post-detail.styl b/source/css/_common/components/pages/post-detail.styl
new file mode 100644
index 0000000000..3f26afdb29
--- /dev/null
+++ b/source/css/_common/components/pages/post-detail.styl
@@ -0,0 +1,6 @@
+.page-post-detail {
+
+  .sidebar-toggle-line { background: $sidebar-highlight; }
+
+  .comments { overflow: hidden; }
+}
diff --git a/source/css/_common/components/post/post.styl b/source/css/_common/components/post/post.styl
index a33b60b830..f697db956d 100644
--- a/source/css/_common/components/post/post.styl
+++ b/source/css/_common/components/post/post.styl
@@ -34,11 +34,6 @@
   transform: rotate(30deg);
 }
 
-.comments {
-  margin: 60px 20px 0;
-  overflow: hidden;
-}
-
 .use-motion {
   if hexo-config('motion.transition.post_block') {
     .post-block,