:root{color-scheme:dark;font:16px/1.6 system-ui,sans-serif;color:#f7f5f0;background:#000}*{box-sizing:border-box}body{margin:0;min-height:100svh;background:#000}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #f2c788;outline-offset:5px}[hidden]{display:none!important}.scene{position:fixed;inset:0;overflow:hidden;pointer-events:none}.scene img,.scene video{position:absolute;width:100%;height:100%;object-fit:contain;object-position:50% 50%;filter:blur(9px) brightness(.4);transform:none;transition:filter .9s ease}.scene video{opacity:0}.shade{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.16),rgba(0,0,0,.1) 40%,rgba(0,0,0,.6))}header{position:relative;z-index:2;display:flex;justify-content:space-between;align-items:start;padding:28px 5vw}header a{color:#f5f0e6;text-decoration:none;letter-spacing:.15em;font-size:.875rem}.chinese{display:block;color:#c7c1b8;font-size:.875rem;line-height:1.7;font-weight:400;letter-spacing:normal;margin-top:4px}header .chinese{font-size:.8125rem}.welcome{max-width:850px;width:100%;text-align:center;padding:30px 24px}.eyebrow{font-size:.75rem;letter-spacing:.2em;color:#d7b58b;margin:0 0 22px}main{position:relative;z-index:1;min-height:calc(100svh - 108px);display:flex;align-items:center;justify-content:center;padding:0 0 40px}h1{font-family:Georgia,'Times New Roman',serif;font-weight:400;line-height:1.12;font-size:clamp(2.3rem,5.2vw,4.6rem);letter-spacing:-.025em;margin:0}.slogan-zh{font-size:1rem;margin:22px 0 0;color:#d1c9bb}#login-panel{max-width:510px;margin:38px auto 0;opacity:1;transform:translateY(0);transition:opacity 1.2s ease,transform 1.2s cubic-bezier(.22,1,.36,1)}label{display:block;text-align:left;font-size:1rem;margin-bottom:14px}.entry{display:flex;gap:10px}input{min-width:0;flex:1;width:100%;padding:14px;border:1px solid #8d8171;border-radius:5px;background:rgba(0,0,0,.5);color:#fff}button{border:1px solid #91816a;border-radius:5px;background:rgba(0,0,0,.4);color:#f5f0e6;padding:10px 18px}button[type=submit]{background:#e1c09a;color:#191512;font-size:.9375rem;min-width:140px}button[type=submit] .chinese{color:#41362a;font-size:.8125rem}#replay{margin-top:24px;background:transparent;font-size:.875rem;border-color:transparent}#skip{font-size:.875rem}.error{color:#ffc2b6;text-align:left;font-size:1rem}.error .chinese{color:#e9b2a8}.playing .scene video{opacity:1;filter:blur(0) brightness(1);transform:none}.playing .scene img{opacity:0}.playing .welcome{opacity:0;pointer-events:none}.revealing .scene video{filter:blur(9px) brightness(.4)}.revealing .welcome{opacity:1;transition:opacity .7s ease}.playing #login-panel,.boot #login-panel{opacity:0;transform:translateY(10px);pointer-events:none}.welcome{transition:opacity .9s ease}body:not(.playing) .scene video.loaded{opacity:1}body:not(.playing) .scene img{opacity:1}@media(max-width:600px){header{padding:20px}main{padding-bottom:24px;min-height:calc(100svh - 95px)}.welcome{padding:24px 20px}.entry{flex-direction:column}h1{font-size:2.6rem}.scene img,.scene video{object-fit:contain}#login-panel{margin-top:28px}.eyebrow{font-size:.75rem;letter-spacing:.12em}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}

.boot .scene,.boot .welcome{opacity:0}

.intro-controls{display:flex;gap:10px;align-items:start}#sound-toggle{font-size:.875rem;min-width:110px}.playing .scene video{animation:fade-in .5s ease both}@keyframes fade-in{from{opacity:0}to{opacity:1}}@media(max-width:600px){header{gap:12px}header a{font-size:.75rem;letter-spacing:.1em}.intro-controls{gap:6px}.intro-controls button{padding:8px 10px}#sound-toggle{min-width:90px}}@media(prefers-reduced-motion:reduce){.playing .scene video{animation:none}}

/* Reserve the replay row so the centered slogan and form never jump on reveal. */
#replay[hidden]{display:inline-block!important;visibility:hidden;pointer-events:none}
@media(prefers-reduced-motion:reduce){#login-panel{transform:none!important}}

/* Reveal the form after the slogan, retaining the paused video during dimming. */
body:not(.playing):not(.boot) #login-panel{transition-delay:.65s}

/* Quiet first-visit entry; audio starts from the explicit play gesture. */
#intro-gate{position:fixed;inset:0;z-index:10;display:flex;align-items:center;justify-content:center;background:#000;color:#fff;padding:28px;opacity:1;visibility:visible;transition:opacity .3s ease,visibility 0s}
#intro-gate.leaving{opacity:0;visibility:hidden;pointer-events:none;transition:opacity .3s ease,visibility 0s .3s}
.gate-content{text-align:center;width:100%;max-width:850px;transform:translateY(-4vh)}
#intro-title{font:500 clamp(2rem,5vw,3.8rem)/1.2 system-ui,sans-serif;letter-spacing:-.035em;margin:0;color:#fff;text-wrap:balance}
.gate-content>p.chinese{font-size:1rem;color:#b5b5b5;margin:18px 0 38px}
#play-intro{display:block;margin:0 auto;min-width:190px;padding:14px 32px;background:#1c1c1c;border:1px solid #454545;border-radius:7px;color:#fff;box-shadow:0 4px 0 #101010;transition:transform .12s ease,background .15s ease,box-shadow .12s ease}
#play-intro .chinese{color:#bbb}#play-intro:active{transform:translateY(2px) scale(.985);box-shadow:0 1px 0 #101010;background:#151515}
#play-intro:disabled{cursor:wait}
#gate-skip{display:block;margin:22px auto 0;padding:8px 18px;background:transparent;border-color:transparent;color:#aaa;font-size:.875rem}#gate-skip .chinese{color:#999}
#intro-loading{position:absolute;left:0;right:0;font-size:.875rem;color:#bbb;margin:16px 0 0}
.at-gate .scene,.at-gate .welcome,.at-gate header{opacity:0;pointer-events:none}
@media(hover:hover){#play-intro:hover{background:#292929}#gate-skip:hover{color:#fff}}
@media(prefers-reduced-motion:reduce){#play-intro:active{transform:none}}

.login-brand{display:flex;align-items:center;gap:16px}.login-brand .brand-mark{display:block;width:64px;height:48px;flex-shrink:0;object-fit:contain}.login-brand .brand-name{border-left:1px solid #303845;padding-left:16px}@media(max-width:600px){.login-brand{gap:10px}.login-brand .brand-mark{width:44px;height:36px}.login-brand .brand-name{padding-left:10px}}