fix: input style issue #3089

Author: tangjinzhou

components/form/style/mixin.less

@@ -10,49 +10,40 @@
   .@{ant-prefix}-input-affix-wrapper {
     &,
     &:hover {
-      background-color: @background-color;
       border-color: @border-color;
     }
 
-    &:focus {
+    &:focus,
+    &-focused {
       .active(@border-color);
     }
-
-    &:not([disabled]):hover {
-      border-color: @border-color;
-    }
   }
 
-  .@{ant-prefix}-calendar-picker-open .@{ant-prefix}-calendar-picker-input {
-    .active(@border-color);
+  .@{ant-prefix}-input {
+    &:not(&-disabled) {
+      background-color: @background-color;
+    }
   }
 
-  // Input prefix
   .@{ant-prefix}-input-affix-wrapper {
-    .@{ant-prefix}-input {
-      &,
-      &:hover {
-        background-color: @background-color;
-        border-color: @border-color;
-      }
-
-      &:focus {
-        .active(@border-color);
-      }
+    &:not(&-disabled) {
+      background-color: @background-color;
     }
-
-    &:hover .@{ant-prefix}-input:not(.@{ant-prefix}-input-disabled) {
-      border-color: @border-color;
+    input:focus {
+      box-shadow: none !important;
     }
   }
 
+  .@{ant-prefix}-calendar-picker-open .@{ant-prefix}-calendar-picker-input {
+    .active(@border-color);
+  }
+
   .@{ant-prefix}-input-prefix {
     color: @text-color;
   }
 
   .@{ant-prefix}-input-group-addon {
     color: @text-color;
-    background-color: @background-color;
     border-color: @border-color;
   }