/* 相关下载 开始 */
.down{
    right: 0;
    top:30px;
    z-index: 99;
    width: 10%;
    height: 100%;
    position: fixed;

}
.down a{
    width: 25px;    
    display: inline-block;
    color: #fff;
    font-size: 14px;
    background:gray;
    text-align: center;
    padding: 10px 5px;
    border-radius: 6px 0 0 6px;
    position: absolute;
    top:48%;
    right: 0;
    display: none;
}
.down>a i{
    display:inline-block;
    width: 16px;
}
/* 相关下载 结束 */