ipad/ios按钮背景颜色为渐变色？去除iOS按钮渐变色

input[type=button],
input[type=submit],
input[type=file],
button {
cursor: pointer;
-webkit-appearance: none;
}

/* 背景颜色为透明渐变色？去除iOSbutton按钮渐变色*/
			input[type=button],
			input[type=submit],
			input[type=file],
			button {
				cursor: pointer;
				-webkit-appearance: none;
			}