feat: 新增標籤外掛 timeline closed #644

fix: 自建頁面圖片沒有 blur 效果
improvement: 優化 404 頁面 UI
improvement: lazyload 默認佔位圖改為透明圖片
improvement: 優化 lazyload blur 出現特效
improvement: 優化 css

source/css/_layout/aside.styl

@@ -130,13 +130,7 @@
         height: w
 
         & > img
-          width: 100%
-          height: 100%
-          transition: all .6s
-          object-fit: cover
-
-          &:hover
-            transform: scale(1.1)
+          @extend .imgHover
 
       .content
         flex: 1
@@ -253,6 +247,7 @@
       width: $toc-mobile-width
       opacity: 0
       transform-origin: right bottom
+      transition: none
 
     .toc-percentage
       float: right
@@ -323,7 +318,7 @@
 
   img
     height: 100%
-    transition: all .5s
+    transition: filter 375ms ease-in 0.2s, transform .3s
     object-fit: cover
 
     &:hover