@keyframes arrowMoveDown{0%{top:0}to{top:60px}}#arrow{animation-name:arrowMoveDown;animation-duration:1.5s;animation-timing-function:linear;animation-delay:2s;animation-play-state:running;animation-iteration-count:infinite}@keyframes openTheGate{0%{background:url(/assets/pics/首页1.png);background-size:cover;background-position:50%}to{background:url(/assets/pics/首页2.png);background-size:cover;background-position:50%}}.selected{animation-name:selected-anim;animation-duration:10s;animation-timing-function:cubic-bezier(.165,.84,.44,1);animation-iteration-count:1}@keyframes selected-anim{0%{left:0}to{left:300px}}#gate{scroll-timeline:--background;animation-timeline:--background;animation-name:openTheGate;animation-timing-function:linear;-ms-overflow-style:none}