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/_global/function.styl

@@ -27,6 +27,29 @@
   &:hover
     box-shadow: var(--card-hover-box-shadow)
 
+.imgHover
+  width: 100%
+  height: 100%
+  transition: filter 375ms ease-in .2s, transform .6s
+  object-fit: cover
+
+  &:hover
+    transform: scale(1.1)
+
+.postImgHover
+  &:hover
+    img
+      opacity: .8
+      transform: scale(1.1)
+
+  img
+    position: absolute
+    width: 100%
+    height: 100%
+    opacity: .4
+    transition: all .6s, filter 375ms ease-in .2s
+    object-fit: cover
+
 maxWidth600()
   @media screen and (max-width: 600px)
     {block}

source/css/_global/index.styl

@@ -29,6 +29,9 @@
   --toc-link-color: $toc-link-color
   --card-box-shadow: 0 3px 8px 6px rgba(7, 17, 27, .05)
   --card-hover-box-shadow: 0 3px 8px 6px rgba(7, 17, 27, .09)
+  --timeline-bg: $timeline-content-bg
+  --timeline-border-color: $timeline-border-color
+  --pseudo-hover: $pseudo-hover
 
 body
   position: relative
@@ -203,7 +206,7 @@ img
 if hexo-config('lazyload.enable') && hexo-config('lazyload.blur') && !hexo-config('lazyload.placeholder')
   img
     &[data-lazy-src]:not(.loaded)
-      filter: blur(10px) brightness(1)
+      filter: blur(8px) brightness(1)
 
     &[data-lazy-src].error
       filter: none

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