*{
  margin: 0;
  padding: 0;
  list-style: none;
}
body{
  background-color: #FFFFFF;
  font-family: Microsoft YaHei;
  font-weight: 400;
}

.tophome{
  width: 46.875rem;
  height: 6.625rem;
  background: #AC0D12;
  border-bottom: .0625rem solid #FFFFFF;
  display: flex;
  align-items: center;
}
.tophomemiddle{
  display: flex;
  align-items: center;
  width: 42.25rem;
  display: flex;
  justify-content: space-between;
  margin-left: 1.625rem;
  margin-right: 2.625rem;
}
.tophomemiddleleft{
  display: flex;
  align-items: center;
}
.backhome{
  width: 1.0625rem;
  height: 1.8125rem;
  margin-right: 1.625rem;
  overflow: hidden;
}
.tophomemiddleright{
  width: 7.3125rem;
  display: flex;
  justify-content: space-between;
}
.classification-logo img{
  width: 2.5625rem;
  height: 2.5625rem;
}
.tophomemiddle p{
  font-size: 2rem;


color: #FFFFFF;
}
.logo{
  width: 22.4375rem;
  height: 4.625rem;
  
}
.topbanner{
  width: 46.875rem;
  height: 21.3125rem;
}
.bottom{
  padding-left: 2.125rem;
  padding-right: 2.1875rem;
}
.middle{
  margin-top: 2.5625rem;
  display: flex;
  font-size: 1.625rem;
  height: 2.9375rem;
  border-bottom: .0625rem solid #DCDCDC;
  margin-bottom: 2.3125rem;
}
.Collection{
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  margin-right: 4.125rem;
}
.choose{
  width: 7.25rem;
  height: .375rem;
  background-color: #C6040C;
}
.choose2{
  width: 7.25rem;
  height: .375rem;
  background-color: #C6040C;
  display: none;
}
.bottom_videobox{
  display: flex;
  justify-content: space-between;
  
}
.bottom_video{
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 14.3125rem;
  justify-content: space-between;
  margin-bottom: 1.4375rem;
}
.video_cover{
  width: 20.875rem;
  height: 11.75rem;
}
.video_name{
  font-size: 1.5rem;
  color: #666666;
}