Setting the Apple Phone Input button and button buttons color display issues

Web page, although set the input button and button background color, but on the Apple phone test will still find the background color is transparent gradient, does not work, how to solve it?

This can be solved by adding the following code to the CSS public style, removing the button and Input Button system default appearance style, commonly used to remove native styles under iOS.

{cursor:pointer; outline:0px; -webkit-appearance:None

Setting the Apple Phone Input button and button buttons color display issues