.down_list{}
.down_list .unit{ width:201px; height: 219px; padding: 50px 59px; border-bottom: 1px #e3e3e3 solid; border-right: 1px #e3e3e3 solid; text-align: center; overflow: hidden;}
.down_list .unit a.preview_image{ display: inline-block; width: 200px; height: 160px; overflow: hidden;}
.down_list .unit a.btnDown{ display: inline-block; height: 30px; line-height: 30px; padding: 0 15px; background:#b8b8b8; color: #fff; margin-top: 30px;}
.down_list .unit a.btnDown:hover{ background: #005bac;}