index.css

.flex{
    display: flex;
}
.image{
    width: 110px;
    height: 110px;
    border-radius: 200px;
}
body{
    background-color: azure;
}
.top{
    background-color: #8EC5FC;
    background-image: linear-gradient(62deg, #8EC5FC 0%, #E0C3FC 100%);
    text-align: center;
    padding: 40px; 
    border-radius:50px;
}
.column {
flex-direction: column;
}
.mid{
    padding: 40px;
    border-radius: 50px;
    text-align: center;
    justify-content: center;
}
.box{
    padding: 10px;
    border-radius: 50px;
    width: 111px;
    height: 110px;
}
#QR{
    background: url(image/QR.jpg) no-repeat 0px 0px;
    width: 150px;
    height: 150px;
    position: absolute;
    background-size: 150px;
                    
    /*可以覆盖在内容之上，因为采用absolute时，脱离文档流*/
    z-index: 22;
    border: 2px solid green;
    display: none;
}
a:hover #QR
{
display: block;            
}
.lower {
    padding: 40px;
    border-radius: 50px;
    text-align: center;
    justify-content: center;
}