.banner {
    position: relative;
    height: 970px;
}

.part4 {
    margin-bottom: 0;
}

.banner .ct {
    position: absolute;
    width: 100%;
    height: 100%;
    line-height: 100%;
    top: 0;
    left: 0;
    color: white;
    font-size: 60px;
}

.banner .putTxt {
    margin-top: 650px;
    text-align: left;
    color: white;
}

.banner .title {
    margin-bottom: 25px;
    font-size: 50px;
}

.banner .desc {
    max-width: 800px;
    font-size: 20px;
    line-height: 25px;
}

.part5 {
    margin: 175px 0 140px;
}



@media (max-width:1023px) {
.banner{ height:auto; padding:60% 0 20%;}
.banner .ct{ position:static; background:none;}
.banner .putTxt{ margin-top:0;}
}

@media (max-width:767px) {
.banner .title{ font-size:32px; line-height:normal}
.banner .title font{ display:block}
.banner .desc{ font-size:18px;}
}