.banner {
    width: 1300px;
    height: 504px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
    margin-top: 1px;
}

.img li {
    float: left;
}

.num {
    position: absolute;
    bottom: 30px;
    width: 100%;
    text-align: center;
    font-size: 0;
}

.num li {
    width: 50px;
    height: 4px;
    opacity: 0.2;
    background: #ffffff;
    display: block;
    display: inline-block;
    margin: 0 5px;
    cursor: pointer;
}

.btn {
    display: none;
}

.btn span {
    display: block;
    width: 48px;
    height: 48px;
    cursor: pointer;
}

.btn .prev {
    position: absolute;
    left: 30px;
    top: 45%;
    background: url(../images/prevIcon.png);
}

.btn .next {
    position: absolute;
    right: 30px;
    top: 45%;
    background: url(../images/nextIcon.png);
}

.num .active {
    background-color: #fff;
    opacity: 1;
}