update 日历样式

src/components/app-calendar/icon.css

@@ -14,8 +14,11 @@
 
 .icon-arrow-left:before { content: "\e501"; }
 .sign {
-    position: relative;
-    top: -5px;
+    top: 88%;
+    overflow: hidden;
+    position: absolute;
+    right: calc( 50% - 8px);
+    height: 28px;
 }
 .sign-item{
     line-height: 1;