.about:before {background-color: #000000b3;}
.index main>#video{width:100%;min-height:auto}

.home-exhib{padding: 2% 0;}
.home-exhib .common-title{text-align:center}
.home-exhib .list{margin-top: 20px;}
.home-exhib .swiper-slide{min-height:auto!important}
.home-exhib .swiper-slide img{aspect-ratio: 4/3;width: 100%;height: auto;object-fit: cover;}