*{
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
}
.abouttop{
    width: 100%;
    max-width: 19.2rem;
    margin: 0 auto;
    height: 0.44rem;
    background: #f2f2f2;
    bottom: 1px solid #ededed;
}
.abouttop_center{
    width: 15rem;
    height: 0.44rem;
    margin: 0 auto;
    position: relative;
}
.abouttoptel{
    width: 0.14rem;
    height: 0.14rem;
    position: absolute;
    top: 0.16rem;
    left: 0rem;
}
.aboutwhatspp{
    font-size: 0.14rem;
    color: #666;
    position: absolute;
    height: 0.44rem;
    line-height: 0.44rem;
    left: 0.2rem;
}
.aboutyouxiang{
    width: 0.15rem;
    height: 0.11rem;
    position: absolute;
    top: 0.16rem;
    left: 2.66rem;
}
.aboutemail{
    font-size: 0.14rem;
    color: #666;
    position: absolute;
    height: 0.44rem;
    left: 2.91rem;
    line-height: 0.44rem;
}
..banner{
    margin-top: 0.9rem;
}
.about_topbutton{
    font-size: 0.14rem;
    color: #fff;
    width: 1.22rem;
    height: 0.28rem;
    line-height: 0.28rem;
    text-align: center;
    position: absolute;
    right: 0rem;
    top: 0.09rem;
    background: #ffa30f;
}
.nav{
    width: 100%;
    height: 0.9rem;
    z-index: 9999;
    background: #fff;
    max-width: 19.2rem;
   display: flex;
   float: right;
   justify-content: space-around;
}

.nav_center{
    width: 15rem;
    height: 0.9rem;
    margin: 0 auto;
    position: relative;
}
.logo{
    position: absolute;
    top: 0.19rem;
    left: 0rem;
    float: left;
}