.sb2t{display:inline-block;height:40px;width:40px;position:fixed;bottom:40px;right:10px;box-shadow:0 0 10px rgba(0,0,0,.05);overflow:hidden;text-indent:100%;white-space:nowrap;background-repeat:no-repeat;background-position:center;background-size:75%;visibility:hidden;opacity:0;-webkit-transition:all .4s;-moz-transition:all .4s;transition:all .4s;z-index:9999}.sb2t a{border-bottom:none}.sb2t.top-is-visible{visibility:visible;opacity:1}.sb2t.top-fade-out{opacity:.6}.sb2t:hover{opacity:1;border-bottom:none}@media only screen and (min-width:768px){.sb2t{right:20px;bottom:20px}}@media only screen and (min-width:1024px){.sb2t{height:60px;width:60px;right:30px;bottom:30px}}.sb2t-demo{display:inline-block;height:40px;width:40px;position:fixed;bottom:40px;right:10px;box-shadow:0 0 10px rgba(0,0,0,.05);overflow:hidden;text-indent:100%;white-space:nowrap;background:rgba(100,70,139,.8) no-repeat center 50%;-webkit-transition:all .4s;-moz-transition:all .4s;transition:all .4s}polygon{fill:#fff}ellipse{stroke:#fff}