.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 {
    position: relative;
    margin: 0 auto 50px;
    max-width: 250px;
}
.download-list .box .cover{
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 5;
}
.download-list .pic {
    position: relative;
    overflow: hidden;
    margin-bottom: 10px;
}
.download-list .pic:before {
    content: " ";
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    background: url('../../images/common/download/hover.png') 50% 35% no-repeat rgba(255,255,255,0.9);
    border: 1px solid #f5ae52;
    opacity: 0;
    -webkit-transition: all 0.3s;
    -o-transition: all 0.3s;
    transition: all 0.3s;
}
.download-list .box:hover .pic:before {
    opacity: 1;
    background-position: 50% 50%;
}
.download-list .name {
    color: #000;
    font-family: 'Lato', '微軟正黑體', '文泉驛正黑', 'WenQuanYi Zen Hei', '儷黑 Pro', 'LiHei Pro', 'Microsoft JhengHei',  '微软雅黑', 'メイリオ', '맑은 고딕', sans-serif;
    font-size: 15px;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    height: 27px;
}
.download-list .box:hover .name {
    color: #f2951d;
}

@media screen and (max-width: 1000px) {
    .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: 767px) {
    .download-list {
        margin: 0 -7px;
    }
    .download-list .item {
        padding: 0 7px;
    }
    .download-list .box {
        margin-bottom: 30px;
    }
}
@media screen and (max-width: 640px) {
    .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: 440px) {
    .download-list .item {
        width: 100%;
    }
    .download-list .item:nth-child(n) {
        clear: none;
    }
}