.main-content.download2{
    padding: 0;
}
.download-list {
    margin: 0 -10px;
}
.download-list .item {
    width: 25%;
    padding: 0 10px;
}
.download-list .item:nth-child(4n+1) {
    clear: left;
}
.download-list .box {
    max-width: 280px;
    margin: 0 auto 50px;
    position: relative;
}
.download-list .box .cover{
    font-size: 0;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    z-index: 30;
}
.download-list .pic {
    position: relative;
    overflow: hidden;
    border: 5px solid #FFFFFF;
    outline: 5px solid #205289;
    transition: all .3s ease;
}
.download-list .pic::before{
    content: '';
    position: absolute;
    width: calc(100% - 2px);
    height: calc(100% - 2px);
    border: 1px solid #DDDDDD;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}
.download-list .name {
    position: relative;
    font-size: 17px;
    font-weight: 500;
    color: #333;
    line-height: 1.2;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    margin: 10px 0;
    padding: 0 10px;
    letter-spacing: 0.2px;
    transition: all 0.3s ease;
}
.download-list .box:hover .name {
    color:#257FB8;
}
.download-list .url {
    color: #929292;
    font-size: 14px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    transition: all 0.3s ease;
    font-family: 'Poppins',serif;
    margin: 5px 0 0;
}
.download-list .box:hover .url {
    text-decoration: underline;
}
.download-list + .btn-box {
    padding-top: 30px;
}
@media screen and (max-width: 1480px) {
    .has-side .content {
        width:90%;
    }
}
@media screen and (max-width: 1000px) {
    .main-content.download2 {
        padding: 30px 0 50px;
    }
    .download-list .box {
        max-width: 280px;
        margin: 0 auto 30px;
    }
    .download-list .name {
        font-size: 16px;
    }
}
@media screen and (max-width: 900px) {
    .download-list .item {
        width: 33.33%;
    }
    .download-list .item:nth-child(4n+1) {
        clear: none;
    }
    .download-list .item:nth-child(3n+1) {
        clear: left;
    }
}
@media screen and (max-width: 660px) {
    .download-list .item {
        width: 50%;
    }
    .download-list .item:nth-child(3n+1) {
        clear: none;
    }
    .download-list .item:nth-child(2n+1) {
        clear: left;
    }
}
@media screen and (max-width: 430px) {
    .download-list .item {
        width: 100%;
    }
}