*{
    margin: 0;
    padding: 0;
    list-style-type: none;
}
.slt-banner{
    width: 100%;
    /*子绝父相*/
    position: relative;
    /*超出部分全部隐藏，解决横向滚动条*/
    overflow: hidden;
}
.slt-banner ul{
    position: absolute;
}
.slt-banner ul li{
    /*这个100%是相对于父盒子的（会把父盒子的宽度继承过来,如父盒子300%,这这里的100%就会相当于300%）*/
    width: 100%;
    height: 615px;
    float: left;
    background:  no-repeat center center;
}
.slt-banner ol{
    height: 20px;
    position: absolute;
    left:50%;
    bottom: 30px;
    padding: 0 10px;
    border-radius: 10px;
}
.slt-banner ol li{
    width: 10px;
    height: 10px;
    float: left;
    margin: 5px 5px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    cursor: pointer;
}
.slt-banner ol .current{
    background: rgba(255,255,255,1);
}
.slt-banner i{
    width: 29px;
    height: 60px;
    position: absolute;
    top: 50%;
    margin-top: -60px;
    cursor: pointer;
    border-radius: 5px;
    display: none;
}
.slt-banner .left{
    left: 30px;
    background: url('../img/left_right.png') no-repeat 0 0px;
    background-size:100%;
}
.slt-banner .right{
    right: 30px;
    background: url('../img/left_right.png') no-repeat 0px -60px;
    background-size:100%;
}
.slt-banner .left:hover , .slt-banner .right:hover{
    background-color: rgba(0, 0, 0, 0.31);
}