.advertisement {
    margin: 0 auto;
}

.advertisement .box {
    width: 100%;
    height: 100%;
    position: relative;
}

.advertisement .btn {
    position: absolute;
    bottom: 0px;
    right: 20px;
    margin-bottom: 5px;
}

.advertisement .btn li {
    float: left;
    margin-left: 18px;
    width: 12px;
    height: 2px;
    text-align: center;
    background: #444444;
    border-radius: 2px;
    color: transparent;
}

.advertisement .banner_list {
    width: 100%;
    height: 100%;
}

.advertisement .banner_list li {
    display: none;
    width: 100%;
    height: 100%;
}

.advertisement .banner_list li a {
    display: block;
    width: 100%;
    height: 100%;
}

.advertisement .banner_list li a img {
    width: 100%;
    height: 100%;
}

.advertisement .btn {
    border: 0;
}

.advertisement .btn li.on {background: #FF7700;}

.advertisement .btn .sel {
    background-color: orange;
}