#banner_div,#nav_list{
    width:100%;
}
#banner_div{
    width: 100%;
    height: 465px;
    position: relative;
}
#banner_list{
    margin: 0 auto;
    width: 1000px;
    padding: 0;
}
#banner_list li{
    position: relative;
}
#banner_list li{
    display:none;
}
#banner_list li.uns{

}
#banner_list li.dis{
    z-index: 1;
    animation: fadeIn 5s;
    display:block;
}
@keyframes fadeIn
{
    0%{opacity: 0;}
    35%{opacity:1;}
    60%{opacity:1;}
    100%{opacity:1;}
}
@keyframes fadeOut
{
    0%{opacity:1;}
    60%{opacity:0;}
    100%{opacity:0;}
}

.left-btn,.right-btn {
    width: 70px;
    height: 70px;
    position: absolute;
    top: 45%;
    right: 0px;
    background: url("./img/you1.png") no-repeat center;
    cursor: pointer;
}

.left-btn {
    left: 0px;
    background: url("./img/zuo1.png") no-repeat center;
}
.left-btn:hover,.right-btn:hover {
    background-color: rgba(255, 255, 255, 0.25);
    transition: all 0.8s;
}

.mtbauto{
    margin: 10px auto 30px;
}