.bk-fenlei-page{font-family:system-ui,sans-serif}
.bk-category-header{animation:fadeInDown .5s ease-out}
@keyframes fadeInDown{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}
.bk-category-card{animation:zoomIn .6s ease-out forwards;opacity:0}
.bk-category-card:nth-child(1){animation-delay:.1s}
.bk-category-card:nth-child(2){animation-delay:.15s}
.bk-category-card:nth-child(3){animation-delay:.2s}
.bk-category-card:nth-child(4){animation-delay:.25s}
.bk-category-card:nth-child(5){animation-delay:.3s}
.bk-category-card:nth-child(6){animation-delay:.35s}
.bk-category-card:nth-child(7){animation-delay:.4s}
.bk-category-card:nth-child(8){animation-delay:.45s}
@keyframes zoomIn{from{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}