.pdflist{display: flex;flex-wrap: wrap;justify-content: space-between;}
.pdflist .item{width: 25%;padding: 20px;text-align: center;}
.pdflist .img{width: 100%;}
.pdflist .img img{width: 90%;}
.pdflist .pdfname{font-weight: bold;margin: 16px;}
.pdflist .down{border:1px solid var(--color);text-align: center;transition: .3s;}
.pdflist .down a{display: flex;align-items: center;text-decoration:none;justify-content: center;transition: .3s;padding: 10px 0;}
.pdflist .down em{margin-right: 5px;}
.pdflist .item:hover .down{background: var(--color);} 
.pdflist .item:hover .down a{color: #fff}
@media (max-width:768px) {
    .pdflist .item{width: 50%;}
}