【全局提示 第二轮UI验收问题】关闭按钮颜色：grey-7

Author: fengjingxuan8

src/components/message/index.less

@@ -5,7 +5,7 @@
 
 @bg: @color-white;
 @border-color: @gray-6;
-@close-x-color: @gray-6;
+@close-x-color: @gray-7;
 @close-x-hover-color: @gray-7;
 
 @success-bg: @green-4;
@@ -30,7 +30,7 @@
 
 .cloud-message-type(@bg, @bgBorderColor, @msgTextColor, @tagColor) {
   //box-shadow: 0 4px 24px 0 rgba(0, 0, 0, 0.1), 0 2px 8px 0 rgba(0, 0, 0, 0.04);
-  box-shadow: 0 4px 12px 0 rgba(0,0,0,0.1), 0 0 1px 0 rgba(0,0,0,0.3);
+  box-shadow: 0 4px 12px 0 rgba(0, 0, 0, 0.1), 0 0 1px 0 rgba(0, 0, 0, 0.3);
   border-radius: 6px;
   background: @bg;
   .msg-text {