.lunbo {
    height: calc((900 / 1921)* 100vw);
    width: 100%;
}

.swipertop .swiper-slide img {
    width: 100%;

    min-height: 100%;
    transition: 1s linear 2s;
    transform: scale(1.1, 1.1);
}

.swipertop .swiper-slide-active img,
.swipertop .swiper-slide-duplicate-active img {
    transition: 6s linear;
    transform: scale(1, 1);
}

.navbefore {
    transition: all 0.7s ease-out 0s;
}

.head1 {
    position: fixed;
    transition: all 0.7s ease-out 0s;
}

.hidden {
    display: none;
    transition: all 0.7s ease-out 0s;
}