feat: add backgroud color for card

styles/recoConfig.styl

@@ -2,6 +2,7 @@ $boxShadow = 0 1px 6px 0 rgba(0, 0, 0, 0.2)
 $boxShadowHover = 0 2px 16px 0 rgba(0, 0, 0, 0.2)
 $textShadow = 0 2px 4px rgba(0, 0, 0, 0.1);
 $borderRadius = .25rem
+$backgroundColor = #fff
 
 $themePicker = {
   red: #f26d6d,

styles/theme.styl

@@ -29,7 +29,6 @@ body
   left 0
   right 0
   height $navbarHeight
-  background-color #fff
   box-sizing border-box
 
 .sidebar-mask
@@ -296,3 +295,26 @@ th, td
 
 .search-box input
   border-radius: $borderRadius
+
+/********* 悬浮卡片背景颜色 **********/
+
+.navbar
+  background $backgroundColor
+  .links
+    background $backgroundColor
+
+.home-blog
+  .home-blog-wrapper
+    .info-wrapper
+      background $backgroundColor
+
+.abstract-item
+  background $backgroundColor
+
+.category-wrapper
+  .category-item
+    background $backgroundColor
+
+.pagation
+  .jump
+    background $backgroundColor