.download-list {
    max-width: 1100px;
    margin: 0 auto;
}
.download-list .item {
    width: 25%;
    padding: 0 7px;
}
.download-list .item:nth-child(4n+1) {
    clear: left;
}
.download-list .box {
    max-width: 240px;
    margin: 0 auto 40px;
    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;
    margin-bottom: 6px;
}
.download-list .pic:before {
    content: '';
    display: block;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: url('../../images/common/download/hover.svg') 50% 50% no-repeat rgba(0,0,0,0.6);
    opacity: 0;
    -webkit-transition: all .5s;
    -o-transition: all .5s;
    transition: all .5s;
}
.no-svg .download-list .pic:before {
    background-image: url('../../images/common/download/hover.png');
}
.download-list .box:hover .pic:before {
    opacity: 1;
}
.download-list .name {
    position: relative;
    color: #333333;
    font-size: 18px;
    font-weight: normal;
    letter-spacing: 1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 24px;
    margin: 0 0 8px 0;
    transition: all .5s;
}
.download-list .box:hover .name {
    color: #52A9A4;
}
@media screen and (max-width: 1000px) {
    .download-list .name{
        font-size: 16px;
        margin: 0 0 4px 0;
    }
    .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: 600px) {
    .download-list {
        max-width: 600px;
    }
    .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: 560px) {
    .download-list {
        margin: 0 -7px;
    }
}
@media screen and (max-width: 400px) {
    .download-list .item {
        width: 100%;
    }
}