.apst-wrapper,.apst-wrapper *,.apst-wrapper ::after,.apst-wrapper ::before,.apst-wrapper::after,.apst-wrapper::before{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;-ms-box-sizing:border-box;-o-box-sizing:border-box;box-sizing:border-box}.apst-wrapper{display:none;position:fixed;z-index:99999;cursor:pointer;box-sizing:border-box;-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.apst-top{top:20px}.apst-bottom{bottom:20px}.apst-left{left:20px}.apst-center{left:50%;margin-left:-40px}.apst-right{right:20px}.apst-button{display:block;position:relative;width:60px;height:60px;background-color:#555;-webkit-border-radius:50%;-moz-border-radius:50%;-ms-border-radius:50%;-o-border-radius:50%;border-radius:50%;-webkit-transition:all .2s;-moz-transition:all .2s;-ms-transition:all .2s;-o-transition:all .2s;transition:all .2s}.apst-button::before{content:"";display:block;position:relative;left:22px;top:25px;width:17px;height:17px;border-right:6px solid #fff;border-top:6px solid #fff;-webkit-transform:rotate(-45deg);-moz-transform:rotate(-45deg);-ms-transform:rotate(-45deg);-o-transform:rotate(-45deg);transform:rotate(-45deg);-webkit-transition:all .2s;-moz-transition:all .2s;-ms-transition:all .2s;-o-transition:all .2s;transition:all .2s}.lt-ie9 .apst-button{background:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEAAAABABAMAAABYR2ztAAAAG1BMVEUAAAD////////////////////////////////rTT7CAAAACHRSTlMAOfJhxAy4AkQzkWYAAACBSURBVEjH7cyxCYBAFIPhiIituIGdpaULCJYWDmHpDCpyYwvhIcLxYq3c3wXCh1Tq62UVdHXzArRbpYEQGg2EQEIAJBRAQgAkFLD3JHygy0n4AEDCBwASAjDCB4wQgBEe4BMLgZs4o8NM4CaG6FCMBIw4JsQEASMGxJXPsSKV+m8XlKczI6Hk6gkAAAAASUVORK5CYII=) 8px 7px no-repeat}.apst-button:hover{background-color:#333}.apst-button:hover::before{border-color:#fff}@media only screen and (max-width:640px){.apst-center{margin-left:-35px}.apst-button{width:70px;height:70px}.apst-button::before{left:25px;top:27px;width:20px;height:20px}}@media only screen and (max-width:400px){.apst-center{margin-left:-30px}.apst-button{width:60px;height:60px}.apst-button::before{left:21px;top:23px;width:18px;height:18px;border-width:5px}}