#lunbotu {
    --swiper-theme-color: #fff;
    --swiper-navigation-size: 24px;
    position: relative;
    width:100%;
    overflow:hidden;
}

#lunbotu .swiper-container {
    width: 100%;
    height: 550px;
    overflow-x: hidden;
}

#lunbotu .anime-letter {
    display: inline-block;
    line-height: 1em;
}

@media (max-width: 768px) {
    #lunbotu {
        --swiper-navigation-size: 12px;
    }

    #lunbotu .swiper-container {
        height: calc(550px / 2);
    }
}