article {

    width: 960px;
    margin: 0 auto;
    font-size: 21px;
}

article > h1 {

    width: 100%;
    margin-top: 80px;
    font-size: 40px;
    text-align: center;
}

article > ul {

    width: 100%;
    margin: 60px 0 0 0;
    line-height: 1.6em;
    text-align: left;
    list-style-type: none;
}

article > ul > li {

    display: inline-block;
    width: calc(100% / 3);
    margin: 30px 0;
    text-align: center;
}

article > ul > li > img{

    border: solid 1px #eeeeee;
}