APP上点击事件时 取消点击的阴影

*, *:after, *:before { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; -webkit-tap-highlight-color: rgba(0, 0, 0, 0); -webkit-touch-callout: none; -webkit-user-drag: none; -webkit-user-select: none; -ms-user-select: none; -ms-touch-action: none; -moz-user-select: -moz-none;}