update box-shadow and border

style/components/datepicker/Calendar.less

@@ -78,7 +78,7 @@
   text-align: left;
   background-color: #fff;
   border-radius: @border-radius-base;
-  box-shadow: 0 0 4px #d9d9d9;
+  box-shadow: @overlay-shadow;
   background-clip: padding-box;
   line-height: @line-height-base;
 

style/components/dropdown.less

@@ -38,9 +38,9 @@
     text-align: left;
     background-color: #fff;
     border-radius: 3px;
-    box-shadow: 0 1px 5px #ccc;
+    box-shadow: @overlay-shadow;
     background-clip: padding-box;
-    border: 1px solid #ccc;
+    border: 1px solid #d9d9d9;
 
     > li {
       margin: 0;

style/components/message.less

@@ -20,7 +20,7 @@
     padding: 8px 16px;
     border-radius: @border-radius-base;
     border: 1px solid #d9d9d9;
-    box-shadow: 0 0 4px rgba(0,0,0,0.16);
+    box-shadow: @overlay-shadow;
     background: #fff;
     display: block;
   }

style/components/popover.less

@@ -105,7 +105,7 @@
     background-clip: padding-box;
     border: 1px solid @popover-border-color;
     border-radius: @border-radius-base;
-    box-shadow: 0 0 4px #d9d9d9;
+    box-shadow: @overlay-shadow;
   }
 
   &-title {

style/components/select.less

@@ -220,7 +220,7 @@
     display: none;
     background-color: white;
     border: 1px solid #d9d9d9;
-    box-shadow: 0 0px 4px #d9d9d9;
+    box-shadow: @overlay-shadow;
     border-radius: 4px;
     box-sizing: border-box;
     z-index: 100;

style/components/tooltip.less

@@ -51,7 +51,7 @@
   text-decoration: none;
   background-color: @tooltip-bg;
   border-radius: @border-radius-base;
-  box-shadow: 0 0 4px #d9d9d9;
+  box-shadow: @overlay-shadow;
 }
 
 // Arrows

style/themes/default/custom.less

@@ -137,3 +137,5 @@
 @input-disabled-bg           : #f3f5f7;
 
 @form-item-margin-bottom     : 24px;
+
+@overlay-shadow              : 0px 0px 4px rgba(0, 0, 0, 0.17);