body{
    background-color: #fff;
}
.col{
    width: 820px;
    height: 370px;
    margin: 0 auto;
    margin-top: 150px;
    margin-bottom: 60px;
    position: relative;
    transform: scale(1.5);
    color: white;
    font-size: 28px;
}
.col_window{
    height: 340px;
    background-color: #11212F;
    box-shadow: 0 0 8px black;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.col_con{
    position: absolute;
    left: 0;
    height: 340px;
    transition: left .4s ease;
}
.col_con>img{
    float: left;
}
.arrows_Lcon{
    width: 45px;
    height: 108px;
    background: rgba(0, 0, 0, 0.52);
    position: absolute;
    top: 35%;
    left: 0;
    cursor: pointer;
}
.arrows_Rcon{
    width: 45px;
    height: 108px;
    background: rgba(0, 0, 0, 0.52);
    position: absolute;
    top: 35%;
    right: 0;
    cursor: pointer;
}
.arrows_Lcon:hover{
    background: linear-gradient(to right,rgba( 171, 218, 244, 0.3) 5%,rgba( 171, 218, 244, 0) 95%);
}
.arrows_Rcon:hover{
    background: linear-gradient(to left,rgba( 171, 218, 244, 0.3) 5%,rgba( 171, 218, 244, 0) 95%);
}
.arrows_left,.arrows_right{font-family: "宋体";}
.arrows_left{
    width: 23px;
    height: 36px;
    margin: 0 auto;
    margin-top: 35px;
    
}
.arrows_right{
    width: 23px;
    height: 36px;
    margin: 0 auto;
    margin-top: 35px;
}
.dots{
    width: 900px;
    height: 9px;
    margin: 0 auto;
    margin-top: 20px;
    transform: scale(1.5);
    position: absolute;
    bottom: 25px;
}
.dots div{
    width: 72px;
    margin: 0 auto;
}
.dots span{
    width: 16px;
    height: 9px;
    background-color: #496274;
    float: left;
    margin-left: 5px;
    border-radius: 2px;
    cursor: pointer;
    color: transparent;
}
.dots span:hover{
    background-color: #768895 !important;
}