diff --git a/source/css/_common/outline/mobile.styl b/source/css/_common/outline/mobile.styl
index 47d2beff4..5e4843fb6 100644
--- a/source/css/_common/outline/mobile.styl
+++ b/source/css/_common/outline/mobile.styl
@@ -1,10 +1,3 @@
-/*
-// < 767px
-+mobile() {
-
-}
-*/
-
 if (hexo-config('mobile_layout_economy')) {
   +mobile-small() {
     // For Pisces & Gemini schemes only wider width (remove main blocks in Gemini).
@@ -82,9 +75,3 @@ if (hexo-config('mobile_layout_economy')) {
     }
   }
 }
-/*
-// < 413px
-+mobile-smallest() {
-
-}
-*/
diff --git a/source/css/_schemes/Gemini/index.styl b/source/css/_schemes/Gemini/index.styl
index 7077ed732..6b2342f6a 100644
--- a/source/css/_schemes/Gemini/index.styl
+++ b/source/css/_schemes/Gemini/index.styl
@@ -70,7 +70,7 @@
 }
 
 // ==================================================
-// > 768px & < 991px
+// >= 768px & <= 991px
 // ==================================================
 +tablet() {
   // Posts in blocks.
@@ -98,7 +98,7 @@
 }
 
 // ==================================================
-// < 767px
+// <= 767px
 // ==================================================
 +mobile() {
   // Posts in blocks.
diff --git a/source/css/_schemes/Pisces/_sidebar.styl b/source/css/_schemes/Pisces/_sidebar.styl
index 5299d97fd..2718905c7 100644
--- a/source/css/_schemes/Pisces/_sidebar.styl
+++ b/source/css/_schemes/Pisces/_sidebar.styl
@@ -4,10 +4,6 @@
     position: -webkit-sticky;
     position: sticky;
     top: $sidebar-offset;
-
-    +tablet-mobile() {
-      display: none;
-    }
   }
 
   .sidebar-toggle {