add the layout of kbd tag

source/css/_mode/darkmode.styl

@@ -51,6 +51,11 @@ if hexo-config('darkmode.enable') || hexo-config('display_mode') == 'dark'
       .aplayer
         filter: brightness(.8)
 
+      kbd
+        border-color: #696969
+        background-color: #525252
+        color: #e2f1ff
+
     // 頭部
     #page-header
       &.nav-fixed > #nav,
@@ -154,4 +159,4 @@ if hexo-config('darkmode.enable') || hexo-config('display_mode') == 'dark'
       background: #121212
 
     #operare_artitalk .c2
-      background: #121212
+      background: #121212