/* GPT Trader — 3D flight home page.
   Layout: fixed full-screen 3D night flight (Tokyo > Hong Kong > London > New York) driven by scroll.
   Game HUD frames it; content rides past in glass panels left/right of the road. Accent follows the city. Dark only by design. */
:root{
  color-scheme:dark;
  --ink:#04050b; --glass:rgba(6,8,17,.68);
  --fg:#f2f3f8; --muted:#a9adc2; --dim:#6f748c;
  --acc:#ff3d9a; --on-acc:#07080f;
  --ok:#4dffb0; --off:#7b8098; --brk:#ffd166;
  --line:rgba(255,255,255,.11);
  --display:"Unbounded","Arial Black",system-ui,sans-serif;
  --body:"Manrope",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.1,1);
}
:root:lang(el){--display:"Manrope","Arial",sans-serif}
:root:lang(zh){--display:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;--body:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--fg);font-family:var(--body);font-size:16.5px;line-height:1.6;overflow-x:clip;-webkit-font-smoothing:antialiased}
body.nogl{background:radial-gradient(120% 80% at 50% 100%,#2a1030,var(--ink) 70%) fixed}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--acc);outline-offset:3px}
h1,h2,h3{font-family:var(--display);margin:0;text-wrap:balance;font-weight:500;letter-spacing:-.01em}
:root:lang(el) h1,:root:lang(el) h2{font-weight:800}
p,ul,ol{margin:0}
#gl{position:fixed;inset:0;width:100%;height:100%;z-index:0;display:block}
.vig{position:fixed;inset:0;z-index:1;pointer-events:none;background:radial-gradient(ellipse at 50% 45%,transparent 45%,rgba(2,3,8,.72) 100%)}
.warp{position:fixed;inset:0;z-index:1;pointer-events:none;opacity:0;background:radial-gradient(circle at 50% 50%,#fff 0%,var(--acc) 22%,transparent 62%)}

/* HUD */
.bar{position:fixed;left:0;right:0;z-index:30;display:flex;align-items:center;gap:16px;padding-inline:clamp(16px,2.6vw,36px);font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase}
.bar.top{top:0;padding-top:calc(12px + env(safe-area-inset-top,0px));padding-bottom:22px;justify-content:space-between;background:linear-gradient(rgba(3,4,10,.92),rgba(3,4,10,0))}
.bar.bot{bottom:0;padding-bottom:calc(12px + env(safe-area-inset-bottom,0px));padding-top:26px;justify-content:space-between;background:linear-gradient(rgba(3,4,10,0),rgba(3,4,10,.92))}
.logo{display:flex;align-items:center;flex:none}
.logo img{height:30px;width:auto;display:block}
.loc{display:flex;align-items:center;gap:14px;min-width:0;white-space:nowrap}
.loc b{text-transform:uppercase;font-family:var(--display);font-weight:500;font-size:13px;letter-spacing:.1em;color:var(--acc);transition:color .8s}
.loc .ex{color:var(--muted)}
.loc time{color:var(--fg);font-variant-numeric:tabular-nums}
.pill{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);padding:4px 9px;border-radius:99px;color:var(--muted)}
.pill::before,.rt i{content:"";width:7px;height:7px;border-radius:50%;background:var(--off);flex:none}
.pill.open::before,.rt.open i{background:var(--ok);box-shadow:0 0 10px var(--ok)}
.pill.break::before,.rt.break i{background:var(--brk)}
.acts{display:flex;gap:8px;align-items:center}
.hbtn{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);padding:9px 13px;border-radius:3px;background:rgba(6,8,17,.5);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:border-color .3s,color .3s;white-space:nowrap;letter-spacing:.12em;text-transform:uppercase;font-family:var(--mono);font-size:12px}
.hbtn:hover,.hbtn[aria-pressed="true"],.hbtn[aria-expanded="true"]{border-color:var(--acc);color:var(--acc)}
.hbtn.go{background:var(--acc);color:var(--on-acc);border-color:var(--acc);font-weight:500;transition:background .8s,border-color .8s}
.hbtn.go:hover{color:var(--on-acc)}
.burger{width:14px;height:9px;position:relative;border-block:1.5px solid currentColor}
.burger::after{content:"";position:absolute;left:0;right:0;top:50%;height:1.5px;margin-top:-.75px;background:currentColor}
.lang{position:relative}
.lang ul{position:absolute;right:0;top:calc(100% + 8px);list-style:none;padding:6px;min-width:180px;background:rgba(6,8,17,.94);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--line);display:flex;flex-direction:column;text-transform:none;letter-spacing:.02em;font-family:var(--body);font-size:14px}
.lang a{display:flex;justify-content:space-between;gap:12px;padding:8px 12px;border-radius:2px;color:var(--muted)}
.lang a::after{content:attr(data-code);font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--dim)}
.lang a:hover{background:rgba(255,255,255,.06);color:var(--fg)}
.lang a.on{color:var(--acc)}
.tele{color:var(--dim);font-variant-numeric:tabular-nums;display:flex;gap:18px;white-space:nowrap;min-width:150px}
.tele.r{justify-content:flex-end}
.tele b{color:var(--fg);font-weight:400}
.route{display:flex;align-items:center}
.rt{display:flex;align-items:center;gap:9px;padding:8px clamp(8px,1.6vw,22px);color:var(--dim);position:relative;transition:color .4s;font-family:var(--mono);font-size:12px;letter-spacing:.12em;font-variant-numeric:tabular-nums}
.rt+.rt::before{content:"";position:absolute;left:calc(-1*clamp(10px,1.4vw,20px));width:clamp(20px,2.8vw,40px);height:1px;background:var(--line);top:50%}
.rt:hover{color:var(--fg)}
.rt.on{color:var(--acc)}
.rt.on span{color:var(--fg)}
.frame i{position:fixed;width:22px;height:22px;z-index:29;pointer-events:none;border:1px solid var(--acc);opacity:.55;transition:border-color .8s}
.frame i:nth-child(1){left:14px;top:calc(66px + env(safe-area-inset-top,0px));border-right:0;border-bottom:0}
.frame i:nth-child(2){right:14px;top:calc(66px + env(safe-area-inset-top,0px));border-left:0;border-bottom:0}
.frame i:nth-child(3){left:14px;bottom:calc(64px + env(safe-area-inset-bottom,0px));border-right:0;border-top:0}
.frame i:nth-child(4){right:14px;bottom:calc(64px + env(safe-area-inset-bottom,0px));border-left:0;border-top:0}
.level{position:fixed;inset:0;z-index:5;display:grid;place-content:center;justify-items:center;gap:14px;pointer-events:none;opacity:0;text-align:center;padding-inline:16px}
.level small{font-family:var(--mono);font-size:12px;letter-spacing:.4em;color:var(--acc)}
.level strong{font-family:var(--display);font-weight:700;font-size:clamp(40px,10vw,170px);line-height:.95;text-transform:uppercase;color:transparent;-webkit-text-stroke:1.5px #fff;text-shadow:0 0 60px var(--acc)}
.level.go{animation:lvl 2.6s var(--ease) both}
@keyframes lvl{0%{opacity:0;letter-spacing:-.04em;transform:scale(.92)}18%{opacity:1}70%{opacity:1}100%{opacity:0;letter-spacing:.12em;transform:scale(1.06)}}

/* pause-style menu */
.menu{position:fixed;inset:0;z-index:40;background:rgba(3,4,10,.86);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);display:flex;flex-direction:column;padding:calc(84px + env(safe-area-inset-top,0px)) clamp(16px,6vw,96px) calc(40px + env(safe-area-inset-bottom,0px));overflow-y:auto}
.menu .lab{font-family:var(--mono);font-size:12px;letter-spacing:.3em;text-transform:uppercase;color:var(--acc);margin-bottom:18px}
.menu nav{display:flex;flex-direction:column}
.menu nav a{display:flex;align-items:baseline;gap:20px;padding-block:10px;font-family:var(--display);font-size:clamp(24px,4.4vw,52px);line-height:1.1;font-weight:500;border-bottom:1px solid var(--line);transition:color .3s,padding .4s var(--ease)}
.menu nav a:hover{color:var(--acc);padding-left:12px}
.menu .close{position:fixed;right:clamp(16px,2.6vw,36px);top:calc(12px + env(safe-area-inset-top,0px));z-index:41}
@media(max-width:1180px){.loc .ex,.tele{display:none}.bar.bot{justify-content:center}}
@media(max-width:900px){.calc{display:none}}
@media(max-width:640px){.bar.top{padding-bottom:50px;background:linear-gradient(rgba(3,4,10,.97) 72%,rgba(3,4,10,0))}.loc{z-index:31;position:fixed;left:16px;top:calc(60px + env(safe-area-inset-top,0px));font-size:11px;gap:10px}.auto{display:none}.rt span{display:none}.frame{display:none}.logo img{height:24px}.hbtn{padding:8px 10px}}

/* content */
main,footer{position:relative;z-index:10}
.wrap{max-width:1360px;margin-inline:auto;padding-inline:clamp(16px,5vw,80px)}
.stage{min-height:160vh;display:flex;align-items:center;padding-block:30vh}
.stage>.wrap{width:100%;display:flex;flex-direction:column;gap:26vh;align-items:flex-start}
.stage.r>.wrap{align-items:flex-end}
.stage.c>.wrap{align-items:center}
.hero{min-height:100vh;padding-block:120px 120px;align-items:flex-end}
.stage.hero>.wrap{gap:22px}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--acc);transition:color .8s;display:flex;gap:12px;align-items:center}
.eyebrow::before{content:"";width:8px;height:8px;background:currentColor;transform:rotate(45deg);flex:none}
h1{font-size:clamp(30px,4.7vw,74px);line-height:1.04;font-weight:700;text-transform:uppercase;max-width:20ch;text-shadow:0 4px 40px rgba(0,0,0,.7)}
.lead{color:#d5d8e6;max-width:60ch;font-size:clamp(16px,1.3vw,19px);text-shadow:0 2px 18px rgba(0,0,0,.9)}
.chips{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chips li{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;border:1px solid var(--line);background:rgba(6,8,17,.55);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);padding:7px 11px;display:flex;align-items:center;gap:8px}
.chips li::before{content:"";width:6px;height:6px;background:var(--acc);transform:rotate(45deg);transition:background .8s}
.cta{display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-flex;align-items:center;gap:10px;padding:15px 22px;border:1px solid rgba(255,255,255,.28);border-radius:3px;font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;background:rgba(6,8,17,.5);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);transition:transform .3s var(--ease),border-color .3s,color .3s,box-shadow .3s}
.btn:hover{transform:translateY(-3px);border-color:var(--acc);color:var(--acc)}
.btn.fill{background:var(--acc);border-color:var(--acc);color:var(--on-acc);font-weight:500;box-shadow:0 0 34px -6px var(--acc);transition:transform .3s var(--ease),background .8s,border-color .8s,box-shadow .8s}
.btn.fill:hover{color:var(--on-acc);box-shadow:0 0 54px -2px var(--acc)}
.btn.sm{padding:10px 14px;font-size:11.5px}
.scroll{font-family:var(--mono);font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:12px}
.scroll::after{content:"";width:1px;height:38px;background:linear-gradient(var(--acc),transparent);animation:drop 1.8s infinite}
@keyframes drop{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

.panel{position:relative;width:min(600px,100%);background:var(--glass);backdrop-filter:blur(18px) saturate(1.3);-webkit-backdrop-filter:blur(18px) saturate(1.3);border:1px solid var(--line);padding:clamp(22px,2.8vw,40px);display:flex;flex-direction:column;gap:20px;scroll-margin-top:90px}
.panel.wide{width:min(820px,100%)}
.panel::before,.panel::after{content:"";position:absolute;width:18px;height:18px;border:2px solid var(--acc);transition:border-color .8s}
.panel::before{left:-1px;top:-1px;border-right:0;border-bottom:0}
.panel::after{right:-1px;bottom:-1px;border-left:0;border-top:0}
.panel h2{font-size:clamp(23px,2.6vw,36px);line-height:1.12}
.panel>p{color:var(--muted)}
.tag{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--acc);transition:color .8s}
.list{display:flex;flex-direction:column}
.item{border-top:1px solid var(--line);padding-block:20px;display:flex;flex-direction:column;gap:10px}
.item:last-child{padding-bottom:0}
.item h3{font-size:18.5px;line-height:1.25}
.item p{color:var(--muted);font-size:15px}
.item ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:6px 18px;font-size:14px;color:#cdd0de}
.item ul li{display:flex;gap:9px;align-items:baseline}
.item ul li::before{content:"";width:10px;height:1px;background:var(--acc);flex:none;transform:translateY(-4px)}
.item ol{margin:0;padding:0;list-style:none;counter-reset:f;display:flex;flex-direction:column;gap:6px;color:var(--muted);font-size:14.5px}
.item ol li{counter-increment:f;display:flex;gap:10px}
.item ol li::before{content:counter(f);font-family:var(--mono);color:var(--acc);font-size:12px;transform:translateY(3px)}
.widget{display:block;align-self:flex-start;max-width:100%}
.widget img{display:block;max-width:100%;border-radius:4px}
.note{font-size:13px;color:var(--dim)}
details{border-top:1px solid var(--line)}
summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:16px;align-items:center;padding-block:16px;font-weight:700;font-size:16.5px;transition:color .3s}
summary::-webkit-details-marker{display:none}
summary:hover{color:var(--acc)}
summary::after{content:"+";font-family:var(--mono);font-size:20px;color:var(--acc);transition:transform .4s var(--ease)}
details[open] summary::after{transform:rotate(45deg)}
details p{color:var(--muted);font-size:15px;padding-bottom:18px;max-width:66ch}
.fin{display:flex;flex-direction:column;gap:24px;align-items:center;text-align:center;scroll-margin-top:90px}
.fin h2{font-size:clamp(28px,5vw,76px);line-height:1.04;font-weight:700;text-transform:uppercase;max-width:18ch;text-shadow:0 4px 50px rgba(0,0,0,.8)}
.fin p{color:#d5d8e6;max-width:60ch;text-shadow:0 2px 18px rgba(0,0,0,.9)}
footer{background:linear-gradient(transparent,rgba(3,4,10,.95) 30%);padding-block:90px 110px;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;flex-direction:column;gap:18px}
.frow{display:flex;flex-wrap:wrap;gap:10px 24px}
.frow a:hover{color:var(--acc)}
.risk{font-size:13px;color:var(--dim);max-width:90ch}
@media(max-width:760px){.stage{min-height:0;padding-block:38vh}.stage>.wrap{gap:30vh}.stage.hero{padding-block:130px 110px;min-height:0}.stage.hero>.wrap{gap:18px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}html{scroll-behavior:auto}}