.oew-btn-effect-4 a{position:relative;border:1px solid rgba(0,0,0,0.2);overflow:hidden}.oew-btn-effect-4 a>span{-webkit-transition:all 0.1s;-moz-transition:all 0.1s;-o-transition:all 0.1s;transition:all 0.1s}.oew-btn-effect-4 a:hover{background-color:rgba(0,0,0,0.1)}.oew-btn-effect-4 a:hover>span{opacity:0}.oew-btn-effect-4 a::after{content:attr(data-text);position:absolute;width:100%;top:0;left:0;opacity:0;-webkit-transform:translate(-30%, -50%) rotate(-30deg);transform:translate(-30%, -50%) rotate(-30deg);-webkit-transition:all 0.3s;-moz-transition:all 0.3s;-o-transition:all 0.3s;transition:all 0.3s}.oew-btn-effect-4 a:hover::after{opacity:1;top:50%;left:50%;-webkit-transform:translate(-50%, -50%);transform:translate(-50%, -50%)}