div?{??
????width:?300px;??
????height:?200px;??
????background-color:?#57a6f5;??
????margin:?20px?auto;??
????-webkit-transition-property:?width,height,border-radius,margin-top,background-color;??
????transition-property:?width,height,border-radius,margin-top,background-color;??
????-webkit-transition-duration:?1s;??
????transition-duration:?1s;??
????-webkit-transition-timing-function:?ease-out;??
????transition-timing-function:?ease-out;??
????-webkit-transition-delay:?.2s;??
????transition-delay:?.2s;
}
div:hover?{??
????width:?100px;??
????height:?100px;??
????border-radius:?50px;??
????margin-top:?70px;??
????background-color:?red;
}