🐛 修復POST-META關閉閲讀分鐘和訪問量後,評論量前有分割線的bug

🐛 修復canvas_ribbon透明度變為1再變回預設值bug
🐛 修復當default_cover沒設置時，會出現無圖片的bug
🎨 部分js調整

source/css/_global/index.styl

@@ -244,12 +244,10 @@ img:not([src])
 
 .post-ad
   margin: 2rem 0
-  overflow-x: scroll
 
 .ad_height
   display: block !important
   height: auto !important
-  overflow-x: scroll !important
 
 #content-inner,
 #footer
@@ -262,10 +260,13 @@ img:not([src])
 #site_subtitle
   animation: titlescale 1s
 
-canvas,
+canvas:not(#ribbon-canvas),
 #web_bg
   animation: to_show 4s
 
+#ribbon-canvas
+  animation: ribbon_to_show 4s
+
 .card-announcement-animation
   color: #FF0000
   animation: announ_animation .8s linear infinite
@@ -363,6 +364,13 @@ if hexo-config('avatar.effect') == true
   100%
     opacity: 1
 
+@keyframes ribbon_to_show
+  0%
+    opacity: 0
+
+  100%
+    opacity: hexo-config('canvas_ribbon.alpha')
+
 @keyframes avatar_turn_around
   from
     transform: rotate(0)