.qb_banner{position: relative;}
.qb_banner>img{width: 100%;transition: .3s;}

.qb_item{padding: 80px 0;}
.qb_title{font-size: 36px;text-align: center;font-weight: 400;}
.qb_item_w{padding: 80px 0 400px;}
.qb_item_w>p{color: #666;font-size: 16px;line-height: 3;}

@media screen and (max-width: 766px) {
    .qb_banner>img{height: 14rem;object-fit: cover;}

    .qb_title{font-size: 3rem;}
    
}