:root{
  --paper:#f7f4ee;
  --paper-2:#f1ece3;
  --ink:#171716;
  --ink-soft:#302f2c;
  --muted:#6b6861;
  --muted-2:#858179;
  --line:rgba(23,23,22,.11);
  --line-strong:rgba(23,23,22,.18);
  --card:#fffdf8;
  --card-strong:#ffffff;
  --accent:#f48120;
  --accent-soft:#fff0df;
  --accent-2:#6959d9;
  --success:#257556;
  --max:1240px;
  --copy:760px;
  --radius-sm:14px;
  --radius:24px;
  --radius-lg:34px;
  --shadow-sm:0 8px 28px rgba(32,27,21,.055);
  --shadow:0 24px 70px rgba(32,27,21,.09);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:
    radial-gradient(circle at 86% 6%,rgba(244,129,32,.07),transparent 26rem),
    radial-gradient(circle at 7% 31%,rgba(105,89,217,.045),transparent 24rem),
    var(--paper);
  color:var(--ink);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.65;
  letter-spacing:-.006em;
  overflow-x:hidden;
  text-rendering:optimizeLegibility;
}

a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
button,a,input{ -webkit-tap-highlight-color:transparent }
img,svg{max-width:100%}
::selection{background:#f6c99f;color:#171716}

.skip{position:absolute;left:-9999px;top:10px}
.skip:focus{left:16px;z-index:1000;background:#fff;padding:11px 15px;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-sm)}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.hidden{display:none!important}

.wrap{width:min(calc(100% - 48px),var(--max));margin-inline:auto}

.nav{
  position:sticky;
  top:0;
  z-index:70;
  background:color-mix(in srgb,var(--paper) 86%,transparent);
  backdrop-filter:blur(20px) saturate(130%);
  -webkit-backdrop-filter:blur(20px) saturate(130%);
  border-bottom:1px solid transparent;
  transition:border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 10px 34px rgba(32,27,21,.045);background:color-mix(in srgb,var(--paper) 94%,transparent)}
.navin{min-height:72px;display:flex;align-items:center;gap:24px}
.brand{display:inline-flex;align-items:center;gap:11px;font-size:15px;font-weight:800;letter-spacing:-.035em;white-space:nowrap}
.mark{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--ink);color:#fff;font-size:13px;font-weight:850;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08)}
.links{display:flex;align-items:center;gap:4px;margin-left:auto;font-size:14px;font-weight:620;white-space:nowrap}
.links a{position:relative;color:#484641;padding:8px 10px;border-radius:10px;transition:background .18s ease,color .18s ease}
.links a:hover{color:var(--ink);background:rgba(255,255,255,.58)}
.links a.active,.links a[aria-current="page"]{color:var(--ink);background:#fff;border:1px solid rgba(23,23,22,.07);box-shadow:0 4px 16px rgba(32,27,21,.04)}
.actions{display:flex;align-items:center;gap:8px;white-space:nowrap}
.lang{font-size:13px;font-weight:650;color:var(--muted);padding:8px 4px}
.nav-toggle{display:none}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:7px;
  min-height:42px;
  padding:0 17px;
  border:1px solid var(--line-strong);
  border-radius:999px;
  background:rgba(255,255,255,.44);
  color:var(--ink);
  font-size:14px;
  font-weight:700;
  line-height:1;
  cursor:pointer;
  box-shadow:0 1px 0 rgba(255,255,255,.55) inset;
  transition:transform .18s var(--ease),box-shadow .18s ease,border-color .18s ease,background .18s ease;
}
.btn:hover{transform:translateY(-1px);border-color:rgba(23,23,22,.28);background:#fff;box-shadow:var(--shadow-sm)}
.btn:active{transform:translateY(0)}
.btn.primary{background:var(--ink);color:#fff;border-color:var(--ink);box-shadow:0 8px 24px rgba(23,23,22,.15)}
.btn.primary:hover{background:#292824;box-shadow:0 12px 30px rgba(23,23,22,.18)}
.btn:focus-visible,.links a:focus-visible,.lang:focus-visible,input:focus-visible{outline:3px solid rgba(244,129,32,.26);outline-offset:2px}

.hero{padding:86px 0 58px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(360px,.96fr);gap:clamp(38px,5vw,72px);align-items:center}
.hero-grid>div:first-child{min-width:0}
.eyebrow{
  display:flex;
  align-items:center;
  gap:9px;
  width:max-content;
  max-width:100%;
  margin:0 0 18px;
  color:#68645c;
  font-size:11px;
  line-height:1.35;
  font-weight:820;
  letter-spacing:.115em;
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:19px;height:2px;border-radius:3px;background:var(--accent);flex:0 0 auto}
.hero h1{
  max-width:850px;
  margin:0 0 24px;
  font-size:clamp(43px,5.35vw,76px);
  line-height:1.015;
  letter-spacing:-.058em;
  font-weight:780;
  text-wrap:balance;
  overflow-wrap:normal;
}
html[lang^="zh"] .hero h1{font-weight:760;letter-spacing:-.045em;line-height:1.09;text-wrap:balance}
.hero p.lede{max-width:720px;margin:0;color:#53504a;font-size:clamp(17px,1.45vw,20px);line-height:1.62;letter-spacing:-.015em;text-wrap:pretty}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}
.hero-actions .btn{min-height:45px;padding-inline:20px}

.visual{
  position:relative;
  overflow:hidden;
  aspect-ratio:4/3;
  background:#e9e3d9;
  border:1px solid rgba(23,23,22,.12);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  isolation:isolate;
}
.visual::before{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;border-radius:inherit;box-shadow:inset 0 1px rgba(255,255,255,.76)}
.visual::after{content:"KING AI  /  CONTROLLED INTELLIGENCE";position:absolute;left:18px;top:17px;z-index:3;padding:7px 10px;border:1px solid rgba(23,23,22,.08);border-radius:999px;background:rgba(255,255,255,.76);backdrop-filter:blur(10px);font-size:9px;font-weight:830;letter-spacing:.09em;color:#55514a}
.visual img{width:100%;height:100%;display:block;object-fit:cover;transition:transform .65s var(--ease)}
.visual:hover img{transform:scale(1.012)}

.section{padding:82px 0}
.section.alt{background:rgba(255,255,255,.39);border-block:1px solid var(--line)}
.section-head{display:grid;grid-template-columns:minmax(280px,.78fr) minmax(0,1.22fr);gap:clamp(36px,6vw,84px);margin-bottom:46px;align-items:start}
.section h2{max-width:620px;margin:0;font-size:clamp(32px,3.65vw,50px);line-height:1.08;letter-spacing:-.047em;font-weight:760;text-wrap:balance}
html[lang^="zh"] .section h2{letter-spacing:-.035em;line-height:1.15}
.section .intro{max-width:720px;margin:4px 0 0;color:var(--muted);font-size:17px;line-height:1.72;text-wrap:pretty}

.cards{counter-reset:capability;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.card{
  counter-increment:capability;
  position:relative;
  min-height:238px;
  padding:30px 30px 28px;
  overflow:hidden;
  background:linear-gradient(155deg,rgba(255,255,255,.96),rgba(255,253,248,.88));
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:0 1px 0 rgba(255,255,255,.65) inset;
  transition:transform .24s var(--ease),box-shadow .24s ease,border-color .24s ease;
}
.card::before{content:"0" counter(capability);display:block;margin-bottom:36px;color:#9a958b;font-size:11px;font-weight:820;letter-spacing:.12em}
.card::after{content:"";position:absolute;width:160px;height:160px;right:-84px;top:-94px;border-radius:50%;background:radial-gradient(circle,rgba(244,129,32,.11),rgba(244,129,32,0) 68%);pointer-events:none}
.card:hover{transform:translateY(-3px);border-color:rgba(23,23,22,.18);box-shadow:0 18px 42px rgba(32,27,21,.07)}
.card h3{max-width:510px;margin:0 0 13px;font-size:22px;line-height:1.2;letter-spacing:-.033em;font-weight:760;text-wrap:balance}
html[lang^="zh"] .card h3{letter-spacing:-.02em;line-height:1.34}
.card p{max-width:620px;margin:0;color:var(--muted);font-size:15.5px;line-height:1.68;text-wrap:pretty}
.points{display:grid;gap:7px;margin:18px 0 0;padding-left:19px;color:#494640;font-size:14.5px;line-height:1.55}
.points li::marker{color:var(--accent)}

.proof{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:42px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.proof div{min-width:0;padding:22px 26px 23px 0;color:var(--muted);font-size:13px;line-height:1.5}
.proof div+div{padding-left:26px;border-left:1px solid var(--line)}
.proof strong{display:block;margin-bottom:4px;color:var(--ink);font-size:16px;line-height:1.3;letter-spacing:-.018em}

.footer{padding:64px 0 74px;border-top:1px solid var(--line);background:rgba(245,241,233,.62)}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.35fr) .65fr .65fr;gap:44px}
.footer p{max-width:500px;margin:17px 0 22px;color:var(--muted);font-size:14.5px;line-height:1.7}
.footer nav{display:grid;align-content:start;gap:10px;font-size:13.5px;color:#57544e}
.footer nav strong{margin-bottom:5px;color:var(--ink);font-size:12px;letter-spacing:.065em;text-transform:uppercase}
.footer nav a{width:max-content;max-width:100%;transition:color .18s ease,transform .18s ease}
.footer nav a:hover{color:var(--ink);transform:translateX(2px)}
.small{font-size:11.5px;color:var(--muted-2);letter-spacing:.015em}

.auth-shell{min-height:calc(100vh - 72px);padding:72px 0 88px}
.auth-card{width:min(100%,610px);margin:auto;background:rgba(255,253,248,.92);border:1px solid var(--line);border-radius:30px;padding:36px;box-shadow:var(--shadow)}
.auth-card h1{max-width:540px;margin:0 0 14px;font-size:clamp(36px,5vw,52px);line-height:1.06;letter-spacing:-.052em;font-weight:780;text-wrap:balance}
.auth-card>p{margin:0;color:var(--muted);font-size:16px;line-height:1.68}
.form{display:grid;gap:11px;margin-top:28px}
.form label{margin-top:5px;font-size:12.5px;font-weight:760;color:#44413b}
.form input{width:100%;min-height:50px;border:1px solid var(--line-strong);border-radius:13px;background:#fff;padding:0 14px;color:var(--ink);outline:none;transition:border-color .18s ease,box-shadow .18s ease}
.form input:focus{border-color:rgba(244,129,32,.62);box-shadow:0 0 0 4px rgba(244,129,32,.105)}
.form .btn{margin-top:8px;min-height:48px}
.form>a{width:max-content;margin-top:3px;color:#5d5952;font-size:13px;text-decoration:underline;text-underline-offset:3px}
.check{display:flex!important;align-items:flex-start;gap:9px;line-height:1.5}
.check input{width:17px!important;height:17px!important;min-height:0!important;margin:2px 0 0;flex:0 0 auto}
.notice{margin-top:17px;padding:14px 16px;border:1px solid rgba(23,23,22,.07);border-radius:14px;background:#f0ebe2;color:#4d4942;font-size:14px;line-height:1.55}
.keybox{margin-top:13px;padding:16px;border-radius:15px;background:#171716;color:#fff;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;word-break:break-all}
.keys{display:grid;gap:10px;margin-top:18px}
.keyrow{display:flex;justify-content:space-between;gap:18px;border-top:1px solid var(--line);padding-top:13px;font-size:14px}
#turnstile{min-height:66px;margin-top:7px}

.leo-button{position:fixed;right:20px;bottom:20px;z-index:80;min-height:44px;border:1px solid rgba(255,255,255,.1);border-radius:999px;background:var(--ink);color:#fff;padding:0 17px;font-size:13px;font-weight:780;box-shadow:0 16px 36px rgba(23,23,22,.19);cursor:pointer;transition:transform .18s var(--ease),box-shadow .18s ease}
.leo-button:hover{transform:translateY(-2px);box-shadow:0 20px 44px rgba(23,23,22,.24)}
.leo{position:fixed;right:20px;bottom:76px;z-index:80;width:min(390px,calc(100vw - 40px));padding:18px;background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:22px;box-shadow:0 26px 70px rgba(23,23,22,.18);backdrop-filter:blur(18px)}
.leo>strong{font-size:14px;letter-spacing:-.015em}
.leo-log{display:grid;gap:9px;max-height:270px;overflow:auto;margin:13px 0;padding-right:2px}
.leo-msg{padding:10px 12px;border-radius:13px;background:#f0ede6;color:#44413c;font-size:13.5px;line-height:1.5}
.leo-msg.me{justify-self:end;max-width:88%;background:#171716;color:#fff}
.leo form{display:flex;gap:8px}
.leo input{min-width:0;flex:1;border:1px solid var(--line-strong);border-radius:12px;padding:10px 11px;background:#fff;outline:none;font-size:13.5px}
.leo form .btn{min-height:40px;padding-inline:14px}

@media(max-width:1060px){
  .navin{gap:14px}
  .links{gap:0}
  .links a{padding-inline:8px}
  .hero-grid{grid-template-columns:minmax(0,1fr) minmax(330px,.82fr);gap:38px}
}

@media(max-width:920px){
  .links{display:none;position:absolute;left:24px;right:24px;top:78px;margin:0;padding:12px;background:rgba(255,255,255,.97);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);white-space:normal}
  .links.open{display:grid;gap:3px}
  .links a{padding:11px 12px}
  .nav-toggle{display:inline-flex}
  .hero{padding-top:66px}
  .hero-grid,.section-head{grid-template-columns:1fr}
  .hero-grid{gap:36px}
  .hero h1{max-width:850px}
  .visual{width:min(100%,760px)}
  .section-head{gap:18px;margin-bottom:34px}
  .section h2{max-width:740px}
  .section .intro{max-width:760px}
  .footer-grid{grid-template-columns:1.2fr .8fr .8fr;gap:28px}
}

@media(max-width:720px){
  body{font-size:15.5px;line-height:1.62}
  .wrap{width:min(calc(100% - 30px),var(--max))}
  .navin{min-height:66px;gap:8px}
  .brand{margin-right:auto;font-size:14px;gap:9px}
  .mark{width:28px;height:28px;border-radius:8px}
  .links{left:15px;right:15px;top:71px}
  .actions{gap:5px}
  .actions .signin{display:none}
  .lang{padding-inline:3px;font-size:12px}
  .nav-toggle{min-height:38px;padding-inline:12px}
  .actions>.btn.primary{min-height:38px;padding-inline:12px;font-size:12.5px}
  .hero{padding:50px 0 36px}
  .hero-grid{gap:30px}
  .eyebrow{margin-bottom:14px;font-size:10px;letter-spacing:.095em}
  .hero h1{margin-bottom:19px;font-size:clamp(38px,11.5vw,54px);line-height:1.04;letter-spacing:-.052em}
  html[lang^="zh"] .hero h1{font-size:clamp(37px,10.8vw,51px);line-height:1.12;letter-spacing:-.04em}
  .hero p.lede{font-size:16px;line-height:1.68}
  .hero-actions{margin-top:23px;gap:8px}
  .hero-actions .btn{min-height:42px;padding-inline:16px;font-size:13px}
  .visual{border-radius:24px;box-shadow:0 16px 44px rgba(32,27,21,.08)}
  .visual::after{left:12px;top:12px;font-size:8px;padding:6px 8px}
  .section{padding:58px 0}
  .section-head{margin-bottom:28px}
  .section h2{font-size:clamp(30px,9vw,40px);line-height:1.12}
  html[lang^="zh"] .section h2{line-height:1.2}
  .section .intro{font-size:15.5px;line-height:1.72}
  .cards{grid-template-columns:1fr;gap:11px}
  .card{min-height:0;padding:24px 22px 23px;border-radius:20px}
  .card::before{margin-bottom:22px}
  .card h3{font-size:20px}
  .card p{font-size:15px}
  .points{font-size:14px}
  .proof{grid-template-columns:1fr;margin-top:30px}
  .proof div{padding:17px 0}
  .proof div+div{padding-left:0;border-left:0;border-top:1px solid var(--line)}
  .footer{padding:48px 0 60px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px 20px}
  .footer-grid>div:first-child{grid-column:1/-1}
  .auth-shell{padding:48px 0 66px}
  .auth-card{padding:25px 21px;border-radius:22px}
  .auth-card h1{font-size:clamp(34px,10vw,45px)}
  .leo-button{right:14px;bottom:14px}
  .leo{right:14px;bottom:66px;width:calc(100vw - 28px)}
}

@media(max-width:390px){
  .actions>.btn.primary{display:none}
  .hero h1{font-size:38px}
  html[lang^="zh"] .hero h1{font-size:37px}
  .footer-grid{grid-template-columns:1fr}
  .footer-grid>div:first-child{grid-column:auto}
}

@media(prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}