fix(Message): 修复 Message 因为设置了高度阻挡了背后元素导致无法点击的问题

close #1425

Author: smileShirmy

src/message/index.less

@@ -2,7 +2,7 @@
 
 .l-message {
   width: 750rpx;
-  height: 72rpx;
+  height: 0;
   border-radius: 0rpx 0rpx 16rpx 16rpx;
   display: flex;
   justify-content: center;
@@ -36,6 +36,7 @@
 
 .l-message-show {
   transform: translateX(-50%) translateZ(0) translateY(0);
+  height: 72rpx;
   opacity: 1;
 }