body { margin:0;}
li {
    list-style: none;
}

img {
    border: none;
    vertical-align: bottom;
}

a {
    text-decoration: none;
}

.banner {
    width: 100%;
    height: 800px;
    border: 0px;
    margin: 0px auto;
    position: relative;
}

.list li {
    width: 100%;
    height: 800px;
    /*定位叠加*/
    position: absolute;
    left: 0px;
    top: 0px;
    /*隐藏*/
    display: none;
    z-index: 998;
}

.list li.active {
    display: block;
}

.banner>a {
    width: 59px;
    height: 80px;
    /*定位叠加*/
    position: absolute;
    top: 50%;
    margin-top: -40px;
    z-index: 999;
    /*设置透明度 0-1值 */
    opacity: 0.5;
}

.banner>a:hover {
    opacity: 0.8;
}

.prev {
    left: 0px;
    background: url(img/pre.png);
}

.next {
    right: 0px;
    background: url(img/next.png);
}

.number {
    position: absolute;
    z-index: 999;
    width: 860px;
    right: 60px;
    bottom: 20px;
    
}

.number span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #fff;
    float: left;
    margin: 10px 5px;
    cursor: pointer;
}

.number .current {
    background: deepskyblue;
}