*{padding:0px;margin:0px;font-family:微软雅黑}
ul,li,ol{list-style-type:none;}
.clearfix:after{clear:both;overflow:hidden;content:"";display:block;}
input ,button{outline:none;}
.position-r{position:relative}
.fl{float:left;}
.fr{float:right;}
.mt5{margin-top:5px;}
.mt10{margin-top:10px;}
.mt20{margin-top:20px;}
.ml15{margin-left:15px;}
.mr15{margin-right:15px;}
.font_bold{font-weight:bold;}
.choseImg{cursor:pointer;}
.ttd,.formula{display: none; background:url(../images/back-d.png) center repeat;width:100%;height:100%;position:fixed;top:0px;z-index:999;}
.s-state{width:500px;/*height:260px;*/background:#fff;margin:12% auto 0 auto;}
.hint_size{height:50px;width:100%;background:#50d2c2;color:#fff;line-height:50px;}
.mistake_character{/*height:210px;*/text-align:center;color:#606060;font-size:18px;padding-top:55px; padding-bottom: 20px;}
.mistake_character .cont{max-height: 200px;overflow: auto;}
.roger{width:100px;height:40px;border:1px solid #50d2c2;background:#50d2c2;color:#fff;font-size:16px;cursor:pointer;}
#back-to-top{position: fixed;bottom:100px;right: 50px; width: 36px;height: 36px;background:url(../images/sprit.png) no-repeat -356px -23px;z-index: 999;display: none;}
#back-to-top:hover{background:url(../images/sprit.png) no-repeat -393px -23px;z-index: 999;}
.demo-version{position: absolute;right: -49px;top: -30px;width: 100px;height: 72px;opacity: .4;/*background: url(../images/sprit.png) no-repeat -256px 0;*/}
.ellipsis{display:block;white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}
.btns a{display:inline-block;margin:0 5px;line-height:40px;}
.btns a:nth-child(2){background-color: #c9c9c9;border:1px solid #c9c9c9;}