.oew-btn-effect-12 a{position:relative;border:1px solid rgba(0, 0, 0, 0.2);overflow:hidden}.oew-btn-effect-12 a span{position:relative;z-index:2}.oew-btn-effect-12 a::before,.oew-btn-effect-12 a::after{content:"";position:absolute;top:50px;left:50%;width:0;height:0;opacity:0;border-left:100px solid transparent;border-right:100px solid transparent;border-bottom:190px solid rgba(0, 0, 0, 0.15);-webkit-transform:translateX(-50%);transform:translateX(-50%);z-index:1;-webkit-transition:all .5s;-moz-transition:all .5s;-o-transition:all .5s;transition:all .5s}.oew-btn-effect-12 a::after{-webkit-transition-delay:.2s;transition-delay:.2s}.oew-btn-effect-12 a:hover::before{opacity:.4;-webkit-transform:translate(-50%, -90%);transform:translate(-50%, -90%)}.oew-btn-effect-12 a:hover::after{opacity:1;-webkit-transform:translate(-50%, -70%);transform:translate(-50%, -70%)}