#banner ul, li{
    padding:0;margin:0;list-style:none
}
#banner button{
    margin: 0;
    padding: 0;
    border: 1px solid transparent;
    outline: none;
    cursor: pointer;
}
#banner .img-list{
    width: 100%;
    overflow: hidden;
    height: 600px;
    /*object-fit: cover;*/
    position: relative;
}
#banner .img-list li{
    position: absolute;
    width: 100%;
    transition: opacity 0.5s;
   
       
    
}
/* 通过修改元素的层级来显示指定的图片 */
#banner .img-list li:nth-child(1){
    z-index: 1;
}
#banner .pointer{
    position: absolute;
    z-index: 9999;
    bottom: 30px;
    left: 50px;
}
#banner .pointer a{
    display: block;
    float: left;
    width: 10px;
    height: 10px;
    margin-left: 4px;
    background-color: rgba(255, 255, 255, 0.7);
    background-clip: content-box;
    border: 2px solid transparent;
    border-radius: 50%;
}
#banner .pointer a:hover, #banner .pointer a.active{
    background-color: #fff;
    border: 2px solid rgba(255, 255, 255, .3);
}

#banner .con_left, .con_right{
    width: 40px;
    height: 40px;
    /* border-radius: 20px; */
    
    line-height: 1px;
    background-color: rgba(125, 125, 120, 0.3);
    text-align: center;
    color: #eee;
    font-size: 30px;
    font-family: 宋体, serif;
    z-index: 3;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
}
#banner .con_left:hover, .con_right:hover{
    background-color: rgba(242, 214, 2, 0.8);
}
#banner .con_left{
    left: 1%;
    top: 50%;
    z-index: 99999;
    border:  2px solid #fff;
}
#banner .con_right{
    right: 1%;
    top: 50%;
    z-index: 99999;
    border:  2px solid #fff;
}