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.bottomAD{width:1152px;height:87px;background:url('//www.imooc.com/static/moco/v1.0/images/redrain2/bottomClass.png?t=20210618.4') no-repeat;background-position:center;background-size:100% 100%;position:fixed;bottom:-87px;left:50%;-webkit-transform:translateX(-50%);-moz-transform:translateX(-50%);-ms-transform:translateX(-50%);transform:translateX(-50%);box-shadow:0 12px 24px 0 rgba(7,17,27,0.4);border-radius:16px 16px 0 0;z-index:901;display:-webkit-box;display:-moz-box;display:-webkit-flex;display:-moz-flex;display:-ms-flexbox;display:flex;padding-left:53px;padding-right:197px;box-sizing:border-box;justify-content:space-between;align-items:center}  .bottomAD p{font-size:21px;color:#FFFFFF;text-align:center;font-weight:bold;line-height:29px}  .bottomAD p em{font-style:normal;color:#FFEDBA}  .bottomAD .btn{padding:8px 48px;box-sizing:border-box;background:#FFFFFF;border-radius:18px;font-size:14px;color:#F01414;line-height:20px;font-weight:bold;white-space:nowrap}  .bottomAD .btn:hover{background:#FFFFFF;color:#F01414}  .bottomAD .btn-close{position:absolute;width:24px;height:24px;top:6px;right:10px;cursor:pointer}  .bottomAD .btn-close i{font-size:24px;color:#FFFFFF;line-height:24px}  .bottomAD .btn-close:hover i{color:#FFFFFF}  @keyframes ready{0%{opacity:1;transform:scale(0)} 70%{opacity:1;transform:scale(.7)} 100%{opacity:0;transform:scale(1)}}  @-moz-keyframes ready{0%{opacity:1;transform:scale(0)} 70%{opacity:1;transform:scale(.7)} 100%{opacity:0;transform:scale(1)}}  @-webkit-keyframes ready{0%{opacity:1;transform:scale(0)} 70%{opacity:1;transform:scale(.7)} 100%{opacity:0;transform:scale(1)}}  @-o-keyframes ready{0%{opacity:1;transform:scale(0)} 70%{opacity:1;transform:scale(.7)} 100%{opacity:0;transform:scale(1)}}  @keyframes smallToBig{from{transform:translate(-50%, -50%) scale(.1)} to{transform:translate(-50%, -50%) scale(1)}}  @-moz-keyframes smallToBig{from{transform:translate(-50%, -50%) scale(.1)} to{transform:translate(-50%, -50%) scale(1)}}  @-webkit-keyframes smallToBig{from{transform:translate(-50%, -50%) scale(.1)} to{transform:translate(-50%, -50%) scale(1)}}  @-o-keyframes smallToBig{from{transform:translate(-50%, -50%) scale(.1)} to{transform:translate(-50%, -50%) scale(1)}}  @keyframes topToBottom{from{transform:translateY(0) rotate(36deg)} to{transform:translateY(calc(76vh)) rotate(36deg)}}  @-moz-keyframes topToBottom{from{transform:translateY(0) rotate(36deg)} to{transform:translateY(calc(76vh)) rotate(36deg)}}  @-webkit-keyframes topToBottom{from{transform:translateY(0) rotate(36deg)} to{transform:translateY(calc(76vh)) rotate(36deg)}}  @-o-keyframes topToBottom{from{transform:translateY(0) rotate(36deg)} to{transform:translateY(calc(76vh)) rotate(36deg)}}  @keyframes shake{50%{transform:rotate(0deg)} 60%{transform:rotate(20deg)} 70%{transform:rotate(-20deg)} 80%{transform:rotate(20deg)} 90%{transform:rotate(-20deg)} 100%{transform:rotate(0deg)}}  @-moz-keyframes shake{50%{transform:rotate(0deg)} 60%{transform:rotate(20deg)} 70%{transform:rotate(-20deg)} 80%{transform:rotate(20deg)} 90%{transform:rotate(-20deg)} 100%{transform:rotate(0deg)}}  @-webkit-keyframes shake{50%{transform:rotate(0deg)} 60%{transform:rotate(20deg)} 70%{transform:rotate(-20deg)} 80%{transform:rotate(20deg)} 90%{transform:rotate(-20deg)} 100%{transform:rotate(0deg)}}  @-o-keyframes shake{50%{transform:rotate(0deg)} 60%{transform:rotate(20deg)} 70%{transform:rotate(-20deg)} 80%{transform:rotate(20deg)} 90%{transform:rotate(-20deg)} 100%{transform:rotate(0deg)}}@font-face{font-family:'YouSheBiaoTiHei';src:url('../fonts/YouSheBiaoTiHei.ttf');font-weight:normal;font-style:normal}