.pesudo{
position: absolute;
top:50%;
left: 50%;
transform:translate(-50%,-50%);
width: 120px;
padding: 60px;
text-align: center;
color: white;
font-size: 200%;
border-radius:1em;
background:#00aabb;
cursor:pointer;
}
.pesudo:before{
position: absolute;
top: 0; right: 0; bottom: 0; left: 0;
z-index:-1;
border-radius:1em;
background:rgba(0,0,0,.1);
}
.pesudo:hover:before{
content:"";
}
.pesudo:after{
position: absolute;
top: 0; right: 0; bottom: 0; left: 0;
z-index:-1;
border-radius:1em;
background:rgba(255,255,255,.2);
}
.pesudo:active:after{
content:"";
}
陈大吊