p,body{margin: 0}
.ba-color{background-color:rgb(51, 51, 51);}
.shdow{
    font-size: 13px;background-color: #232323;margin: 0 auto;width: 280px;
    font-size: 13px;
    border-radius: 50px;
    padding: 7px 0px;    box-shadow: inset 0 5px 10px -5px #191919, 0 1px 0 0 #444444;
    -moz-box-shadow: inset 0 5px 10px -5px #191919, 0 1px 0 0 #444444;
    -webkit-box-shadow: inset 0 5px 10px -5px #191919, 0 1px 0 0 #444444;
}
.qrimg{text-align:center;width:280px;margin:15px auto 15px auto; display: block;}
.font-f{text-align: center;color: #ffffff;font-family:'Microsoft Yahei';line-height: 1.6;}
.mar-top{margin-top:100px;font-size: 20px;}