diff --git a/app/assets/images/favicon.png b/app/assets/images/favicon.png
new file mode 100644
index 0000000..29f1bed
Binary files /dev/null and b/app/assets/images/favicon.png differ
diff --git a/app/views/layouts/application.html.slim b/app/views/layouts/application.html.slim
index 4b5a466..224b16f 100644
--- a/app/views/layouts/application.html.slim
+++ b/app/views/layouts/application.html.slim
@@ -6,10 +6,12 @@ html
       = yield(:meta)
     title
       = content_for?(:title) ? yield(:title) + " | #{ENV['SITE_NAME']}" : ENV['SITE_NAME']
-    = stylesheet_link_tag    "application"
+    = stylesheet_link_tag    "application", media: 'all'
     = javascript_include_tag "vendor/modernizr"
     = javascript_include_tag "application"
     = csrf_meta_tags
+    / 增加 favico 图标
+    link href="/favicon.png" type='image/png' rel="icon"
   body
     .off-canvas-wrap 
       .inner-wrap
diff --git a/config/routes.rb b/config/routes.rb
index cfb1ea6..46fc2ad 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -30,5 +30,5 @@ WBlog::Application.routes.draw do
   end
 
   get '/about' => 'home#index'
-  get '/:type' => 'archives#index'
+  get '/:type' => 'archives#index', constraints: { type: /tech|life|creator/ }
 end
diff --git a/public/favicon.ico b/public/favicon.ico
deleted file mode 100644
index e69de29..0000000
diff --git a/public/favicon.png b/public/favicon.png
new file mode 100644
index 0000000..820fcc3
Binary files /dev/null and b/public/favicon.png differ