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gif效果:
CSS原理:
div {
width: 200px;
height:200px;
margin: 200px auto;
border: 1px solid #ddd;
background: #fff;
transition: 0.3s all linear;
}
div:hover {
background: #fff;
border-color:#fff;
border-radius: 20px;
box-shadow: 0 0 80px #ddd;
}