.content-a{
    width: 100%;
    height: 10.2681rem ;
}

.content-b{
   width: 100%;
   height: 19.7rem;
}
.content-b .content-b-c .common-width{
    width: 2.2248rem;
    height: 1.6309rem;
    position: relative;
}
.content-b .content-b-c .common-width img{
    position: absolute;
    transition: 1.2s;
}
.content-b .content-b-c .common-width img:nth-child(even){
   opacity: 0;
   left: 0;
   right: 0;
   top: 0;
   bottom: 0;
}
.content-b .content-b-c .common-width img{
    position: absolute;
}
.content-c {
    width: 100%;
    height: 12rem;
}
.content-d {
    width: 100%;
    height: 12rem;
}
.content-e{
    width: 100%;
    height: 24rem;
}
.content-e .float {
    transition: 6s;
    transform: scale(1.2);
}
.content-f{
    width: 100%;
    height: 12.2rem;
}
.content-g{
    width: 100%;
    height: 14.8rem;
}
.content-h{
    width: 100%;
    height: 20.7rem;
}
.content-i{
    width: 100%;
    height: 12.2rem;
}