一款css实现的鼠标经过按钮的特效

background-size: 100% 5px, 100% 5px, 100% 5px, 100% 5px, 5px 100%, 5px 100%, 5px 100%, 5px 100%;
-webkit-box-shadow: inset 0 0 0 5px tomato;
box-shadow: inset 0 0 0 5px tomato;
-webkit-transition: background-size 1s, -webkit-box-shadow .4s .6s, color .4s .6s;
transition: background-size 1s, box-shadow .4s .6s, color .4s .6s;
}