木叶下君山
:root{
–color: linear-gradient(45deg, #f66, #ffb366, #ff6, #b3ff66, #6f6, #66ffb3, #6ff, #66b3ff, #66f, #b366ff, #f6f, #ff66b3, #f66);
}
 
.color{
color:#fff;
mix-blend-mode:lighten;
}
 
.color:before, .color:after{
content:””;
position:absolute;
inset:0;
background:var(–color);
z-index:-1;
border-radius:1rem;
}
 
.color:after{
background:#000;
inset:3px;
}
.color:hover:before{
filter: blur(4px);
}