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i.f01{background:url(../images/onlineclass2021_2/icon-floor04_01.png) center no-repeat}.floor-box-4 .card-item i.f02{background:url(../images/onlineclass2021_2/icon-floor04_02.png) center no-repeat}.floor-box-4 .card-item i.f03{background:url(../images/onlineclass2021_2/icon-floor04_03.png) center no-repeat}.floor-box-4 .card-item i.f04{background:url(../images/onlineclass2021_2/icon-floor04_04.png) center no-repeat}.floor-box-4 .card-item i.f05{background:url(../images/onlineclass2021_2/icon-floor04_05.png) center no-repeat}.floor-box-4 .card-item i.f06{background:url(../images/onlineclass2021_2/icon-floor04_06.png) center no-repeat}.floor-box-5 .title{font-size:48px;font-weight:700;color:#f57575;text-align:center}.floor-box-5 .info{width:1270px;margin:40px auto 0}.floor-box-5 .info .step{font-size:80px;color:#f57575}.floor-box-5 .info .step-tit{margin-top:10px;font-size:36px;color:#494747}.floor-box-5 .normal-content{margin-top:20px;color:#494747;margin-bottom:40px}.floor-box-5 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dt{height:215px}.floor-box-3 .teacher-layer dl dd .book{font-size:16px;width:auto;margin-left:0}.floor-box-4 .card-layer{width:1200px}.floor-box-4 .card-item{margin-right:55px}.floor-box-5 .info{width:1200px}}