.container{
    position: relative;
    width: 102%;
    height: auto;
    margin: 0 auto;
}
.imgs img{
    position: initial;
    cursor: pointer;
    top: 0;
}
.imgs img{
    width: 100%;
    height: auto;
}
.circle{
    width: 200px;
    height: 20px;
    position: absolute;
    bottom:10px;
    left: 80%;
    text-align: center;
    cursor: pointer;
}
.circle b{
    display: inline-block;
    width: 18px;
    height: 15px;
    background-color: #000;
    border-radius: 50%;
    margin: 3px;
}
.circle .current{
    background-color: #fff;
}
.btn{
    position: absolute;
    top: 50%;
    width: 50px;
    height: 100px;
    color: white;
    opacity: 0.5;
    text-align: center;
    line-height: 100px;
    font-size: 60px;
    cursor: pointer;
}
.btn:hover{
    background-color: rgba(255, 255, 255, .7);
}
.left{
    left: 0;
}
.right{
    right: 0;
}