.list_box li {
    height: 50px;
    line-height: 50px;
    font-size: 16px;
    color: #999999;
    text-align: right;
    padding: 0;
    background: url(images/dxhx.png) bottom repeat-x;
    width: 23%;
    float: left;
    margin-left: 20px;}