.banner{
    margin-top: 1.2rem;
}
.banner img{
    display: block;
    width: 100%;
}
.about-us{
    padding: .2rem 0.6rem 1rem;
}
.about-us .about-us-content{
    width: 100%;
    display: block;
}
.zz {
    margin-top: .6rem
}
.zz img{
    width: 2.4rem;
    margin: 0 0.5rem;
}