.download-nav {
    position: relative;
    padding: 30px 0;
}

.download-nav .list-item {
    display: inline-block;
    vertical-align: top;
    width: 126px;
    height: 44px;
    line-height: 44px;
    background-color: #616161;
    text-align: center;
    color: #fff;
    cursor: pointer;
    transition: background-color ease-in-out .4s;
}

.download-nav .list-item.active,
.download-nav .list-item:hover {
    background-color: #ff0000;
}

.download-content {
    margin-bottom: 20px;
}

.download-content .content {
    width: 770px;
    /*height: 460px;*/
    display: none;
}

.download-content .content.active {
    display: block;
}

.download-content .list-item {
    display: inline-block;
    vertical-align: middle;
    width: 242px;
    font-size: 14px;
    text-align: center;
    margin-bottom: 40px;
    cursor: pointer;
}


.download-content .list-item img {
    height: 167px;
}

.download-content .list-item .item-title {
    padding-top: 10px;
}