body{background:#f8f8f8;}
.aboutus{width:1200px;margin:auto;height:600px;background:white;margin-bottom:70px;    display: flex;
    justify-content: space-evenly;
    align-items: center;}
.left{width:360px;height:445px;background: #FFFFFF;
box-shadow: 0px 0px 18px 0px rgba(200, 200, 200, 0.75);}
.right{width:725px;height:445px;}
.left span{display:block}
.left  span:nth-child(1){
    background:#60C1C1;height: 70px;text-align: center;
font-size: 18px;
font-family: Source Han Sans SC;
font-weight: 400;
color: #FFFFFF;
line-height: 70px;
}
.leftspan  span:nth-child(2),.leftspan  span:nth-child(3),.leftspan  span:nth-child(4){
    height: 70px;border-bottom: 1px solid #C8C8C8;padding-left: 25px;display: flex;align-items: center;font-size: 16px;color: #000000;    white-space: nowrap;
}
.gfwx{
    text-align: center;margin-top: 28px;
}
.gfwx span{font-size:16px;letter-spacing: 4px;}
.gfwx img{width:90px;height:90px; }


@media(max-width:820px){
.titdiv{width:100% !important;}
    .btt{width:auto !important;    font-size: 13px !important;}
    .aboutus{display:block !important;width:100%;height:auto}
    .gfwx{display:none;}
    .right{width:100%}
    .left{height:auto !important;width:100% !important;margin-bottom:10px}
}
@media (min-width:820px) and (max-width:1024px){
  .aboutus{width:100%}
.titdiv{width:100% !important;}
}