.download-list {
    margin: 0px -7px;
}

.download-list li:nth-child(4n+1) {
    clear: left;
}

.download-list .item {
    width: 25%;
    padding: 0 7px;
}

.download-list a {
    max-width: 260px;
    margin: 0 auto 75px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

.download-list a:hover,
.download-list .pic:after,
.download-list .pic:before {
    -webkit-transition: all .2s;
    transition: all .2s;
}

.download-list .pic {
    position: relative;
}

.download-list .pic:after {
    content: "";
    position: absolute;
    top: 4px;
    left: 4px;
    bottom: 4px;
    right: 4px;
    display: block;
    z-index: 10;
    background: rgba(89, 178, 0, .6);
    border: 1px solid #FFFFFF;
    outline: 4px solid rgba(89, 178, 0, .6);
    opacity: 0;
}

.download-list .pic:before {
    content: "DOWNLOAD";
    font-size: 20px;
    color: #fff;
    z-index: 100;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -18px 0 0 -59px;
    opacity: 0;
}

.download-list a:hover .pic:after,
.download-list a:hover .pic:before {
    opacity: 1;
}

.download-list .name {
    font-size: 17px;
    text-align: center;
    margin-top: 8px;
    padding: 0 25px;
}

.download-list .name span {
    display: block;
    color: #2C2C2C;
    border-bottom: 1px solid #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-transition: all .2s;
    transition: all .2s;
}

.download-list a:hover .name span {
    color: #238C00;
    border-bottom: 1px solid #CCCCCC;
    -webkit-transition: all .2s;
    transition: all .2s;
}


/****************************  ****************************/

@media screen and (max-width: 1200px) {
    .download-list li:nth-child(4n+1) {
        clear: none;
    }
    .download-list li:nth-child(3n+1) {
        clear: left;
    }
    .download-list .item {
        width: calc((100% / 3) - 0.1px);
    }
}

@media screen and (max-width: 600px) {
    .download-list li:nth-child(3n+1) {
        clear: none;
    }
    .download-list li:nth-child(2n+1) {
        clear: left;
    }
    .download-list .item {
        width: 50%;
    }
}

@media screen and (max-width: 480px) {
    .download-list {
        margin: 0;
    }
    .download-list .item {
        width: 100%;
        padding: 0;
    }
}