:root{
  --paper:#FBF7EF;
  --card:#FFFDF8;
  --tint:#F3EDDD;
  --ink:#2A2721;
  --muted:#6E675C;
  --line:#E0D6BE;
  --gold:#F2B705;
  --gold-soft:#FBE9A8;
  --green:#1F9D55;
  --red:#C93A3A;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{overflow-x:hidden;overflow-x:clip}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:'IBM Plex Sans',Arial,Helvetica,sans-serif;
  font-size:16px;line-height:1.6;
  overflow-x:hidden;
}
.mono{font-family:'IBM Plex Mono',ui-monospace,monospace}
.small{font-size:12.5px}
.muted{color:var(--muted)}

/* progress */
.progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--gold);z-index:99}

/* nav */
nav{position:sticky;top:0;z-index:60;display:flex;align-items:center;justify-content:space-between;gap:16px;background:#FBF7EFf2;border-bottom:1px solid var(--line);padding:12px 22px}
.wordmark{font-weight:700;font-size:19px;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px}
.wordmark .sq{width:14px;height:14px;background:var(--gold);border:2px solid var(--ink);border-radius:4px;display:inline-block}
.nav-links{display:flex;gap:22px}
.nav-links a{color:var(--ink);text-decoration:none;font-size:14px;font-weight:600;position:relative;padding:2px 0}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;height:2px;width:0;background:var(--gold);transition:width .25s ease}
.nav-links a:hover::after{width:100%}
.nav-side{display:flex;align-items:center;gap:10px}
.lang-btn{background:var(--card);border:1px solid var(--line);border-radius:99px;padding:7px 14px;font-size:12px;font-weight:600;cursor:pointer;color:var(--ink)}
.lang-btn:hover{border-color:var(--gold)}
.burger{display:none;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:7px 12px;font-family:inherit;font-weight:700;cursor:pointer;color:var(--ink)}
.mobile-menu{display:none;flex-direction:column;background:var(--card);border-bottom:1px solid var(--line)}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:12px 22px;color:var(--ink);text-decoration:none;border-top:1px solid var(--line);font-weight:600}

/* buttons */
.btn{display:inline-block;text-decoration:none;cursor:pointer;font-family:inherit;font-weight:700;font-size:15px;border-radius:12px;padding:13px 24px;border:1.5px solid var(--ink);transition:transform .18s ease,box-shadow .18s ease;will-change:transform}
.btn-gold{background:var(--gold);color:var(--ink);box-shadow:0 10px 24px #B78D0055}
.btn-gold:hover{box-shadow:0 14px 30px #B78D0066}
.btn-light{background:var(--card);color:var(--ink);box-shadow:0 6px 16px #2A272114}
.btn-s{padding:9px 16px;font-size:13px}
.btn-row{display:flex;gap:10px;flex-wrap:wrap}

/* layout */
main{max-width:1240px;margin:0 auto;padding:0 22px;position:relative}

/* showcase video */
.video-wrap{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--card);
  box-shadow:0 18px 44px #2A272114;aspect-ratio:16/9;max-width:860px}
.video-wrap iframe{width:100%;height:100%;border:0;display:block}
.section{padding:72px 0}
.section.tint{background:var(--tint);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding-left:26px;padding-right:26px;border-radius:22px}
.kicker{font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:12px}
h1{font-size:clamp(38px,5.4vw,64px);line-height:1.02;letter-spacing:-.025em;margin-bottom:16px}
h2{font-size:clamp(28px,3.6vw,42px);letter-spacing:-.02em;margin-bottom:10px}
.sub{color:#4a453b;max-width:72ch;margin-bottom:26px}
.lede{font-size:17.5px;color:#33302a;max-width:58ch;margin-bottom:22px}
.caret{animation:blink 1s steps(1) infinite;font-weight:700}
@keyframes blink{50%{opacity:0}}

/* hero */
.hero{position:relative;padding:64px 0 40px;overflow:hidden}
#dust{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;opacity:.8}
.hero-grid{position:relative;max-width:880px;margin:0 auto;display:flex;flex-direction:column;align-items:center;text-align:center}
.hero-main{min-width:0;max-width:760px}
.hero-main .lede{margin-left:auto;margin-right:auto}
.hero-main .cta-row{justify-content:center}
.hero-stats{text-align:left}
.hero-side{min-width:0;width:100%;margin-top:26px}
.hero-side .tilt{perspective:900px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:14px;align-items:start}
.hero-side .tilt .sim-card{margin-bottom:0}
img,canvas,select,pre{max-width:100%}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:26px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;border:1px solid var(--line);background:var(--card);border-radius:16px;padding:16px;margin-bottom:14px}
.hero-stats strong{font-size:24px;display:block}
.hero-stats span{font-size:12px;color:var(--muted)}
.fair{font-size:12px;color:var(--muted);border-left:3px solid var(--gold);padding-left:10px}
.hero-side .tilt{perspective:900px}
.sim-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px;margin-bottom:14px;box-shadow:0 18px 44px #2A272114;transition:transform .2s ease}
.sim-head{display:flex;justify-content:space-between;align-items:center;font-size:11.5px;letter-spacing:.06em;color:var(--muted);margin-bottom:12px}
.live{color:var(--green);font-weight:600;display:flex;align-items:center;gap:6px}
.live i{width:8px;height:8px;border-radius:50%;background:var(--green);animation:blink 1.2s infinite}
.sim-steps{list-style:none;display:flex;flex-direction:column;gap:8px;margin-bottom:12px}
.sim-steps li{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px;background:var(--paper);transition:all .3s ease}
.sim-steps li.on{border-color:var(--ink);background:var(--gold-soft);transform:scale(1.02)}
.sim-bar{height:8px;background:var(--tint);border-radius:99px;overflow:hidden;margin-bottom:10px}
.sim-bar div{height:100%;width:0;background:var(--gold);border-radius:99px}
#jitter{width:100%;display:block;background:var(--paper);border:1px solid var(--line);border-radius:10px}

/* marquee: full-bleed strip, edge to edge */
.marquee{border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);background:var(--gold);color:var(--ink);overflow:hidden;padding:12px 0;margin:10px calc(50% - 50vw) 0}
.marquee-in{display:inline-flex;gap:34px;white-space:nowrap;animation:scroll 30s linear infinite;font-size:12.5px;letter-spacing:.08em;font-weight:600;padding-right:34px}
@keyframes scroll{to{transform:translateX(-50%)}}

/* tabs */
.tabs{position:relative;display:flex;gap:6px;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:6px;margin-bottom:20px;width:fit-content;max-width:100%}
.tab{border:none;background:transparent;font-family:inherit;font-weight:700;font-size:14px;padding:10px 16px;border-radius:10px;cursor:pointer;color:var(--muted);position:relative;z-index:1;transition:color .2s}
.tab em{font-style:normal;font-size:11px;background:var(--tint);border-radius:99px;padding:1px 8px;margin-left:6px}
.tab.active{color:var(--ink)}
.tab-ink{position:absolute;top:6px;bottom:6px;border-radius:10px;background:var(--gold);z-index:0;transition:left .3s cubic-bezier(.6,0,.2,1.2),width .3s cubic-bezier(.6,0,.2,1.2)}
.tab-panels .panel{display:none}
.tab-panels .panel.active{display:block;animation:panelIn .35s ease}
@keyframes panelIn{from{opacity:0;transform:translateY(10px)}}
.mod-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.mod{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;position:relative;overflow:hidden;transition:transform .2s ease,box-shadow .2s ease}
.mod:hover{transform:translateY(-3px);box-shadow:0 16px 34px #2A272118}
.mod::before{content:"";position:absolute;inset:0;background:radial-gradient(320px circle at var(--mx,50%) var(--my,0%),#F2B70526,transparent 65%);opacity:0;transition:opacity .25s}
.mod:hover::before{opacity:1}
.mod header{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:8px}
.mod h3{font-size:17px}
.mode{font-size:10.5px;letter-spacing:.06em;background:var(--gold-soft);color:var(--ink);border:1px solid var(--gold);border-radius:99px;padding:3px 10px;white-space:nowrap;font-weight:600}
.mod p{font-size:14px;color:#4a453b;margin-bottom:12px}
.mod footer{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:10px;background:none;border-radius:0}

/* engine */
.eng-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.eng-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;position:relative;overflow:hidden}
.eng-card .num{font-size:12px;font-weight:700;background:var(--gold);color:var(--ink);border-radius:99px;padding:3px 12px;display:inline-block;margin-bottom:10px}
.eng-card h3{font-size:16px;margin-bottom:6px}
.eng-card p{font-size:13.5px;color:#4a453b}

/* download */
.dl-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:14px}
.dl-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px}
.dl-card h3{font-size:20px;margin-bottom:8px}
.dl-card ul{margin:14px 0 18px 18px;font-size:14px;color:#33302a}
.dl-card .btn{margin-bottom:4px}
.req{margin:8px 0 0 18px;font-size:13px;line-height:2;color:#33302a}

/* faq */
.faq details{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:0;margin-bottom:10px;overflow:hidden}
.faq summary{cursor:pointer;font-weight:700;font-size:15px;padding:16px 18px;list-style:none;display:flex;gap:12px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary span:first-child{width:28px;height:28px;flex:none;background:var(--gold);color:var(--ink);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:13px}
.faq details[open] summary{border-bottom:1px solid var(--line)}
.faq p{padding:14px 18px 18px;color:#4a453b;font-size:14.5px;max-width:76ch}

footer{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;background:var(--card);border-top:1px solid var(--line);color:var(--ink);font-size:13.5px;padding:22px;margin-top:20px}
#toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:var(--gold);color:var(--ink);border:1.5px solid var(--ink);padding:11px 20px;border-radius:12px;font-size:13px;font-weight:600;display:none;z-index:99;box-shadow:0 14px 30px #B78D0055}
#toast.show{display:block;animation:panelIn .25s ease}

/* reveal: hidden only when JS runs (progressive enhancement) */
.reveal{transition:opacity .6s ease,transform .6s ease}
html.js .reveal{opacity:0;transform:translateY(16px)}
html.js .reveal.in{opacity:1;transform:none}

@media(max-width:940px){
  .dl-grid{grid-template-columns:1fr}
  .mod-grid{grid-template-columns:1fr}
  .eng-grid{grid-template-columns:1fr 1fr}
  .hero-stats{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
  .burger{display:block}
  .section{padding:52px 0}
  .section.tint{padding-left:16px;padding-right:16px}
}
@media(max-width:820px){
  .hero-side .tilt{grid-template-columns:1fr}
  .eng-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr}
}