/*都在用的缩略图*/
.lk-j-thumbnail{
position: relative;
display: block;
background-repeat: no-repeat;
background-size: cover;
background-position: center;
position: static;
overflow: hidden;
--scale-height: 70%;
--pc-height: 100%;
--m-height: 100%;
padding-bottom: var(--scale-height);
width: 100%;
}