.header_social{margin:0;padding:0;list-style-type:none}.header_social li{float:left}.header_social li a{display:block;height:39px;line-height:40px;position:relative;text-align:center;width:39px;transition:all .17s ease-in-out;-moz-transition:all .17s ease-in-out;-webkit-transition:all .17s ease-in-out;-o-transition:all .17s ease-in-out}.header_social li a i{font-size:15px;-webkit-font-smoothing:antialiased}.header_social li a:before{pointer-events:none;-webkit-transform:translateZ(0);transform:translateZ(0);visibility:hidden;opacity:0;content:"";position:absolute;background:transparent;border:5px solid transparent;z-index:1000001;border-bottom-color:#000;margin-bottom:-8px;bottom:0px;left:calc(50% - 5px)}.header_social li a:after{visibility:hidden;opacity:0;z-index:1000000;pointer-events:none;position:absolute;background:#000;color:#fff;padding:2px 8px 3px;font-size:12px;font-family:Open Sans,Helvetica,sans-serif;line-height:normal;white-space:nowrap;bottom:0px;left:50%;content:attr(data-original-title);-webkit-transform:translateX(-50%) translateY(30px);-ms-transform:translateX(-50%) translateY(30px);transform:translateX(-50%) translateY(30px)}.header_social li a:hover:after{visibility:visible;opacity:.9}.header_social li a:hover:before{visibility:visible;opacity:.9}