.allbanner{
    width: 100%;
    position: relative;
    margin-top: 80px;
}
.allbanner-titbox{
    width: 1400px;
    height: 100%;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%);
}
.allbanner-tit{
    position: absolute;
    font-size: 66px;
    color: #fff;
    top: 50%;
    transform: translateY(-50%);
    left: 0%;
}
.main-hz{
    width: 1400px;
    margin: 0 auto;
    overflow: hidden;
    padding-bottom: 80px;
}
@media screen and (max-width: 1400px) {
    .main-hz{
        width: 1200px;
    }
    .allbanner-titbox {
        width: 1200px;
        height: 100%;
       
    }
}