style: 样式调整

src/web/templates/common/guide-intro-dialog.html

@@ -32,6 +32,7 @@
   font-size: 36px;
   width: 28px;
   height: 28px;
+  transform: translate(-50%, 0);
   z-index: 2;
 }
 .guide-intro-dialog .close-icon img {