css3鼠标经过渐隐渐现动画
.ani{
visibility:hidden;;//隐藏
-webkit-transition: all .3s ease;-moz-transition: all .3s ease;-o-transition: all .3s ease;transition: all .3s ease;//动画
position:absolute; //加个定位
top:50px;
}
.ani:hover{
visibility:visible;//显示
top:30px;//位移滑动效果
}
<div class="ani">渐隐渐现动画</div>