.QRcode{
    width: 100px;
    height: 100px;
    position: relative;
    border-radius: 10px;
}
.weixin::after{
    content: '';
    background: url(../image/weixi.jpg);
    background-size: contain;
    width: 150px;
    height: 150px;
    border-radius: 5px;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translate(-50%,-10px);
    display: none;
    transition: all 0.5s;
}
.bili::after{
    content: '';
    background: url(../image/bili.png);
    background-size: contain;
    width: 150px;
    height: 150px;
    border-radius: 5px;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translate(-50%,-10px);
    display: none;
    transition: all 0.5s;
}
.QRcode:hover::after{
display: block;
opacity: 0;
animation-name:gradually;
animation-duration: 1000ms;
animation-fill-mode:forwards;
}
.QRcode::before{
    content: '';
    width: 0;
    height: 0;
    border: 6px solid transparent;
    border-top-color:white ;
    position: absolute;
    top: -10px;
    left: calc(50% - 6px);
    display: none;
    transition: all 0.5s;
}
.QRcode:hover::before{
    display: block;
    opacity: 0;
    animation-name:gradually;
    animation-duration: 1000ms;
    animation-fill-mode:forwards;
}
@keyframes gradually{
    0%{
        opacity: 0;
    }
    100%{
        opacity: 1;
    }
}
.footer-list{
    list-style: none;
    text-align: center;
}
.text-space{
    white-space:nowrap;
}
.text-space{
    white-space:nowrap;
}