div {
    box-sizing: border-box;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: #222;
}

.focus {
    overflow: hidden;
    position: relative;
    margin-top: 0px;
}

.focus ul {
    overflow: hidden;
    width: 500%;
    margin-left: -100%;
}

.focus ul li {
    float: left;
    width: 20%;
}

.focus img {
    width: 100%;
}

.focus ol {
    position: absolute;
    bottom: 5px;
    right: 5px;
    margin: 0;
}

.focus ol li {
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: #d0d0d0;
    list-style: none;
    border-radius: 4px;
    transition: all .3s;
    margin-left: 1px;
}

.focus ol .current {
    width: 15px;
}