.lists li {
    float: left;
    width: 25%;
    text-align: center;
    list-style: none;
}
.lists li a {
    display: block;
    margin: 0 10px 20px;
    padding: 15px 15px;
    font-size: 15px;
    color: #333333;
    border: 1px solid #dedede;
    background: url(../images/1809141402300528191.png) no-repeat 20px center #f6f6f6;
    text-decoration: none;
}