} .wrap > img{ position: absolute; border: 10px solid magenta; box-sizing: border-box;
box-shadow: 4px 4px 3px rgba(0,0,0,0.2); -webkit-transform-origin: center 400px; transform-origin:center 400px; -webkit-transition: transform .7s ease; transition: transform .7s ease;/*移动时间为0.7s,速度为慢->快->慢*/ }