#back-left{position:fixed;bottom:25px;left:30px;z-index:900}
#back-left a{width:38px;height:38px;display:block;background:#BBB;color:#FFF;text-align:center;padding:11px 0 0 0;font-size:11px;-webkit-transition-duration:0;-moz-transition-duration:0;-o-transition-duration:0;-moz-border-radius:22px;-webkit-border-radius:22px;border-radius:22px}
#back-left a:hover{background:#666;text-decoration:none}
#version_date{position:fixed;top:15px;right:30px;z-index:900}