feat: 預設關閉 structured_data

feat: 升級一些項目依賴
feat: 重寫 README.md 和 README_CN.md，改進文檔結構和內容
feat: tags 標籤插件夜間模式調整
feat: 加按鈕懸停效果和動畫
fix: 修復右下角箭頭圖標位置沒有居中的 bug
feat: 增加右下角箭頭和滾動百分比的切換效果
improvement: 優化 tags 頁標籤雲顯示效果
improvement: 整合部分js到 init.js
improvement: 統一 CSS 變數使用，改進主題一致性

source/css/_page/tags.styl

@@ -1,27 +1,91 @@
 .tag-cloud
   &-list
+    animation: tagsFadeIn .6s cubic-bezier(.4, 0, .2, 1)
+
+    &:hover a:not(:hover)
+      opacity: .7
+      transform: scale(.98)
+
     a
+      position: relative
       display: inline-block
-      margin: 2px
-      padding: 2px 7px
+      margin: 5px
+      padding: 3px 12px
       line-height: 1.7
-      transition: all .3s
-      addBorderRadius(5)
+      transition: all .3s cubic-bezier(.4, 0, .2, 1)
+      addBorderRadius(7)
+      overflow: hidden
+      color: white
+      transform: translateY(0) scale(1)
+      will-change: transform, background-color, box-shadow
+
+      &::before
+        position: absolute
+        top: 0
+        left: -100%
+        z-index: -1
+        width: 100%
+        height: 100%
+        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .1), transparent)
+        content: ''
+        transition: left .6s cubic-bezier(.4, 0, .2, 1)
 
       &:hover
-        background: var(--btn-bg) !important
-        box-shadow: 2px 2px 6px rgba(0, 0, 0, .2)
+        background: var(--btn-hover-color) !important
+        box-shadow:
+          0 6px 20px rgba(0, 0, 0, .12),
+          0 4px 8px rgba(0, 0, 0, .08),
+          0 0 0 1px rgba(255, 255, 255, .05)
         color: var(--btn-color) !important
+        transform: translateY(-2px) scale(1.02)
+
+        &::before
+          left: 100%
+
+      &:active
+        box-shadow:
+          0 3px 8px rgba(0, 0, 0, .15),
+          0 1px 3px rgba(0, 0, 0, .1)
+        transition: all .15s cubic-bezier(.4, 0, .2, 1)
+        transform: translateY(-1px) scale(.98)
 
       +maxWidth768()
         zoom: .85
 
+        &:hover
+          transform: translateY(-1px) scale(1.01)
+
+        &:active
+          transform: translateY(0) scale(.99)
+
+        &::before
+          display: none
+
   &-title
     font-size: 2.57em
+    animation: titleSlideIn .8s cubic-bezier(.4, 0, .2, 1)
 
     +maxWidth768()
       font-size: 2em
 
+@keyframes tagsFadeIn
+  from
+    opacity: 0
+    transform: translateY(20px)
+
+  to
+    opacity: 1
+    transform: translateY(0)
+
+@keyframes titleSlideIn
+  from
+    opacity: 0
+    transform: translateX(-30px)
+
+  to
+    opacity: 1
+    transform: translateX(0)
+
 .page-title
   & + .tag-cloud-list
     text-align: left