/* Tách màn thiệp mở đầu; không thay đổi kích thước hay nội dung bên dưới. */
#intro.ws-opening:not(.hide){background:transparent!important;overflow:hidden!important;transition:none}
#intro.ws-opening>.envelope{visibility:hidden}
.ws-opening-half{position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:18px;will-change:transform;transition:transform 1.45s cubic-bezier(.65,0,.2,1)}
.ws-opening-half .envelope{margin:0}
.ws-opening-left{clip-path:inset(0 50% 0 0)}
.ws-opening-right{clip-path:inset(0 0 0 50%)}
#intro.ws-opening-split .ws-opening-left{transform:translate3d(-55%,0,0)}
#intro.ws-opening-split .ws-opening-right{transform:translate3d(55%,0,0)}
.ws-opening-fireworks{position:fixed;inset:0;width:100%;height:100%;z-index:150;pointer-events:none}
@media(prefers-reduced-motion:reduce){.ws-opening-half{transition:none}.ws-opening-fireworks{display:none}}