html+css实现鼠标移过，底部添加阴影

效果如下：

只要你给外层盒子添加这个样式就好了.t-hover-shadow：

.t-hover-shadow {
    transition: transform .3s ease-in-out, box-shadow .3s cubic-bezier(.47, 0, .745, .715), border .3s linear .1s;
}

.t-hover-shadow:hover {
    box-shadow: 0 10px 50px rgba(51, 51, 51, .25);
    -webkit-transform: translateY(-10px);
    -moz-transform: translateY(-10px);
    transform: translateY(-10px)
}