/* ============ TOKENS ============ */
:root{
  --bg:#05080F;
  --bg-2:#080D18;
  --surface:rgba(255,255,255,.035);
  --surface-2:rgba(255,255,255,.05);
  --border:rgba(255,255,255,.09);
  --border-2:rgba(255,255,255,.16);
  --text:#E8EDF7;
  --muted:#93A0B8;
  --teal:#21E6C1;
  --blue:#3D7BFF;
  --violet:#8B5CFF;
  --grad:linear-gradient(110deg,#21E6C1 0%,#3D7BFF 52%,#8B5CFF 100%);
  --max:1180px;
  --r:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
  font-family:"Inter","Noto Sans SC",-apple-system,"PingFang SC",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
  font-size:16px;
}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:"Space Grotesk","Noto Sans SC",sans-serif;font-weight:600;line-height:1.18;letter-spacing:-.01em}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.container{width:min(var(--max),92vw);margin:0 auto}
.section{padding:clamp(72px,10vw,140px) 0;position:relative}

/* ============ NAV ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.4s var(--ease)}
.nav__inner{
  width:min(var(--max),94vw);margin:0 auto;height:74px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav.scrolled{backdrop-filter:blur(18px);background:rgba(5,8,15,.72);border-bottom:1px solid var(--border)}
.nav.scrolled .nav__inner{height:64px}
.brand{display:flex;align-items:center;gap:12px}
.brand__mark{display:block}
.brand__text{display:flex;flex-direction:column;line-height:1.05}
.brand__text strong{font-family:"Space Grotesk",sans-serif;font-size:19px;letter-spacing:-.02em;font-weight:700}
.brand__text em{font-style:normal;font-size:10px;letter-spacing:.42em;color:var(--muted);margin-top:2px}
.nav__menu{display:flex;align-items:center;gap:38px}
.nav__menu a{font-size:14.5px;color:var(--muted);transition:.25s;position:relative}
.nav__menu a:not(.nav__cta):hover{color:var(--text)}
.nav__menu a:not(.nav__cta)::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--grad);transition:.3s var(--ease)}
.nav__menu a:not(.nav__cta):hover::after{width:100%}
.nav__cta{padding:9px 20px;border-radius:100px;border:1px solid var(--border-2);color:var(--text)!important;background:var(--surface);transition:.3s}
.nav__cta:hover{background:var(--grad);border-color:transparent;color:#04101a!important;font-weight:600}
.lang-switch{display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:100px;overflow:hidden;background:var(--surface);margin-left:6px}
.lang-switch a{padding:6px 13px;font-size:13px;color:var(--muted);line-height:1;letter-spacing:.02em;transition:.25s}
.lang-switch a:not(.is-active):hover{color:var(--text)}
.lang-switch a.is-active{background:var(--grad);color:#04101a;font-weight:600}
.nav__menu .lang-switch a::after{display:none}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:24px;height:2px;background:var(--text);transition:.3s var(--ease)}

/* ============ BUTTONS ============ */
.btn{display:inline-flex;align-items:center;gap:9px;padding:14px 28px;border-radius:100px;font-size:15px;font-weight:600;transition:.3s var(--ease);cursor:pointer}
.btn--primary{background:var(--grad);color:#04101a;box-shadow:0 8px 30px -8px rgba(61,123,255,.55)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 14px 40px -8px rgba(61,123,255,.7)}
.btn--ghost{border:1px solid var(--border-2);color:var(--text);background:var(--surface)}
.btn--ghost:hover{background:var(--surface-2);border-color:var(--teal)}
.btn--ghost span{transition:.3s}
.btn--ghost:hover span{transform:translateX(4px)}

/* ============ HEADINGS ============ */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;letter-spacing:.04em;color:var(--muted);
  padding:7px 16px;border:1px solid var(--border);border-radius:100px;background:var(--surface);margin-bottom:30px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--teal);box-shadow:0 0 10px var(--teal);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.kicker{display:inline-block;font-size:13px;letter-spacing:.22em;text-transform:uppercase;color:var(--teal);margin-bottom:20px;font-weight:600}
.section__head{margin-bottom:60px;max-width:760px}
.section__head h2{font-size:clamp(28px,4.4vw,52px)}

/* ============ HERO ============ */
.hero{min-height:100svh;display:flex;flex-direction:column;justify-content:center;position:relative;padding-top:90px;overflow:hidden}
.hero__bg{position:absolute;inset:0;z-index:0}
.orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.5}
.orb--1{width:46vw;height:46vw;background:radial-gradient(circle,#1c8f7e,transparent 70%);top:-12%;left:-8%;animation:float 16s ease-in-out infinite}
.orb--2{width:40vw;height:40vw;background:radial-gradient(circle,#2a4bb0,transparent 70%);bottom:-18%;right:-6%;animation:float 20s ease-in-out infinite reverse}
.orb--3{width:30vw;height:30vw;background:radial-gradient(circle,#5a3bb0,transparent 70%);top:30%;right:24%;animation:float 24s ease-in-out infinite}
@keyframes float{0%,100%{transform:translate(0,0)}50%{transform:translate(4%,5%)}}
.grid{position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 0%,transparent 80%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 0%,transparent 80%)}
.rings{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:min(820px,120vw);height:min(820px,120vw);opacity:.55}
.rings .ring{transform-origin:400px 400px;animation:spin 40s linear infinite}
.rings .ring:nth-child(2){animation-duration:60s;animation-direction:reverse}
.rings .ring:nth-child(3){animation-duration:80s}
@keyframes spin{to{transform:rotate(360deg)}}
.hero::after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,transparent 55%,var(--bg) 100%)}
.hero__content{position:relative;z-index:2;width:min(var(--max),92vw);margin:0 auto;max-width:880px}
.hero__title{font-size:clamp(40px,8vw,86px);font-weight:700;letter-spacing:-.025em}
.hero__sub{font-family:"Space Grotesk",sans-serif;letter-spacing:.22em;color:var(--muted);margin:22px 0 24px;font-size:15px}
.hero__lead{max-width:620px;color:var(--muted);font-size:clamp(15px,1.6vw,17.5px);line-height:1.85}
.hero__cta{display:flex;gap:16px;margin-top:40px;flex-wrap:wrap}
.scroll-cue{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);z-index:2;width:26px;height:42px;border:1.5px solid var(--border-2);border-radius:100px;display:flex;justify-content:center}
.scroll-cue span{width:4px;height:8px;border-radius:4px;background:var(--teal);margin-top:7px;animation:cue 1.8s infinite}
@keyframes cue{0%{opacity:0;transform:translateY(-4px)}40%{opacity:1}80%,100%{opacity:0;transform:translateY(12px)}}

/* ============ STATS ============ */
.stats{padding-top:0;margin-top:-30px}
.stats__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.stat{padding:38px 32px;border:1px solid var(--border);border-radius:var(--r);background:var(--surface);
  transition:.4s var(--ease);position:relative;overflow:hidden}
.stat::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:0;transition:.4s}
.stat:hover{border-color:var(--border-2);transform:translateY(-5px);background:var(--surface-2)}
.stat:hover::before{opacity:1}
.stat__num{font-family:"Space Grotesk",sans-serif;font-size:clamp(38px,5vw,58px);font-weight:700;line-height:1;letter-spacing:-.03em;margin-bottom:18px}
.stat__num.grad{font-size:clamp(28px,3.4vw,40px)}
.stat h3{font-size:18px;margin-bottom:10px}
.stat p{color:var(--muted);font-size:14.5px}

/* ============ CARDS 3 ============ */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{padding:38px 32px 40px;border:1px solid var(--border);border-radius:var(--r);background:var(--surface);transition:.4s var(--ease)}
.card:hover{transform:translateY(-5px);border-color:var(--border-2);background:var(--surface-2)}
.card__index{font-family:"Space Grotesk",sans-serif;font-size:15px;color:var(--teal);letter-spacing:.1em;margin-bottom:24px;font-weight:600}
.card h3{font-size:20px;margin-bottom:14px}
.card p{color:var(--muted);font-size:15px}

/* ============ INSIGHT ============ */
.insight{background:var(--bg-2)}
.truths{display:grid;gap:20px}
.truth{display:grid;grid-template-columns:180px 1fr;gap:30px;padding:38px;border:1px solid var(--border);border-radius:var(--r);
  background:var(--surface);transition:.4s var(--ease)}
.truth:hover{border-color:var(--border-2);background:var(--surface-2)}
.truth__no{font-family:"Space Grotesk",sans-serif;font-size:clamp(26px,3vw,38px);font-weight:700;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.02em}
.truth__body h3{font-size:21px;margin-bottom:18px}
.truth__facts{list-style:none;display:grid;gap:9px;margin-bottom:22px}
.truth__facts li{color:var(--muted);font-size:14.5px;padding-left:22px;position:relative}
.truth__facts li::before{content:"";position:absolute;left:2px;top:9px;width:7px;height:7px;border-radius:50%;background:#ff6b6b;opacity:.8}
.truth__sol{font-size:15px;color:var(--text);padding:18px 22px;border-radius:12px;background:rgba(33,230,193,.06);border:1px solid rgba(33,230,193,.18)}
.truth__sol span{display:block;color:var(--teal);font-weight:600;margin-bottom:6px;font-size:14.5px}

/* ============ TECH ============ */
.tech{overflow:hidden}
.tech__bg{position:absolute;top:0;right:0;height:100%;width:min(46%,560px);
  object-fit:cover;object-position:center top;z-index:0;opacity:.5;pointer-events:none;
  filter:blur(.4px) saturate(1.1);
  mask-image:linear-gradient(90deg,transparent 0%,#000 42%,#000 100%),linear-gradient(180deg,transparent 0%,#000 16%,#000 66%,transparent 98%);
  -webkit-mask-image:linear-gradient(90deg,transparent 0%,#000 42%,#000 100%),linear-gradient(180deg,transparent 0%,#000 16%,#000 66%,transparent 98%);
  -webkit-mask-composite:source-in;mask-composite:intersect}
.tech__veil{position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(90deg,var(--bg) 0%,rgba(5,8,15,.55) 38%,rgba(5,8,15,.12) 66%,rgba(5,8,15,.55) 100%),
    linear-gradient(180deg,var(--bg) 0%,transparent 14%,transparent 84%,var(--bg) 100%)}
.tech>.container{position:relative;z-index:2}
.engine{display:grid;grid-template-columns:minmax(0,580px) 1fr;gap:48px;align-items:center;margin-bottom:96px;
  min-height:440px}
.engine__list{display:grid;gap:18px}
.feat{padding:28px 30px;border:1px solid var(--border);border-radius:var(--r);
  background:rgba(8,13,24,.72);backdrop-filter:blur(8px);
  border-left:2px solid transparent;transition:.4s var(--ease)}
.feat:hover{border-left-color:var(--teal);background:rgba(10,16,28,.85);transform:translateX(4px)}
.feat h3{font-size:19px;margin-bottom:10px}
.feat p{color:var(--muted);font-size:14.5px}
/* digital-human HUD overlay (sits over the section video) */
.hud{position:relative;min-height:420px;align-self:stretch}
.hud__tag{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.12em;color:var(--teal);white-space:nowrap;
  background:rgba(5,8,15,.5);border:1px solid rgba(33,230,193,.25);padding:7px 16px;border-radius:100px;backdrop-filter:blur(8px)}
.hud__metric{position:absolute;font-size:11.5px;color:var(--text);background:rgba(5,8,15,.62);border:1px solid var(--border-2);
  padding:6px 13px;border-radius:100px;backdrop-filter:blur(8px);white-space:nowrap;
  box-shadow:0 6px 22px -10px rgba(0,0,0,.7)}
.hud__metric--1{top:8%;left:0;animation:bob 5s ease-in-out infinite}
.hud__metric--2{top:32%;right:4%;animation:bob 6s ease-in-out infinite .5s}
.hud__metric--3{bottom:30%;left:2%;animation:bob 5.5s ease-in-out infinite 1s}
.hud__metric--4{bottom:6%;right:0;animation:bob 6.5s ease-in-out infinite 1.4s}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-7px)}}

.sub-head{margin:0 0 34px;max-width:680px}
.sub-head h3{font-size:clamp(22px,3vw,32px);margin-bottom:8px}
.sub-head p{color:var(--muted);font-size:15px}
.products{margin-bottom:90px}
.product{border:1px solid var(--border);border-radius:var(--r);overflow:hidden;background:var(--surface);transition:.4s var(--ease)}
.product:hover{transform:translateY(-6px);border-color:var(--border-2)}
.product__img{aspect-ratio:16/10;background-size:cover;background-position:center;transition:.5s var(--ease)}
.product:hover .product__img{transform:scale(1.05)}
.product__body{padding:26px 28px 30px}
.tag{display:inline-block;font-size:12px;letter-spacing:.06em;color:var(--teal);border:1px solid rgba(33,230,193,.3);
  background:rgba(33,230,193,.07);padding:4px 12px;border-radius:100px;margin-bottom:14px}
.product__body h4{font-size:20px;margin-bottom:8px}
.product__body p{color:var(--muted);font-size:14.5px}
.cards-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.mini{padding:30px 26px;border:1px solid var(--border);border-radius:var(--r);background:var(--surface);transition:.4s var(--ease)}
.mini:hover{transform:translateY(-5px);border-color:var(--border-2);background:var(--surface-2)}
.mini h4{font-size:18px;margin-bottom:12px}
.mini h4::before{content:"";display:block;width:30px;height:3px;border-radius:3px;background:var(--grad);margin-bottom:16px}
.mini p{color:var(--muted);font-size:14px}

/* ============ JOIN ============ */
.join{background:var(--bg-2)}
.join__lead{max-width:720px;color:var(--muted);font-size:17px;margin-bottom:48px}
.jobs{list-style:none;display:grid;gap:0;border-top:1px solid var(--border)}
.jobs li{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:26px 8px;border-bottom:1px solid var(--border);transition:.3s var(--ease)}
.jobs li:hover{padding-left:18px;background:linear-gradient(90deg,rgba(33,230,193,.05),transparent)}
.jobs h4{font-size:19px;margin-bottom:4px}
.jobs p{color:var(--muted);font-size:14.5px}
.job__cta{color:var(--teal);font-weight:600;font-size:14.5px;white-space:nowrap;transition:.3s}
.jobs li:hover .job__cta{transform:translateX(5px)}

/* ============ CONTACT ============ */
.contact{overflow:hidden}
.contact__bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.16}
.contact::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,var(--bg) 0%,rgba(5,8,15,.7) 50%,var(--bg) 100%)}
.contact__inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}
.contact__left h2{font-size:clamp(30px,4.6vw,54px);margin-bottom:22px}
.contact__note{color:var(--muted);font-size:16px;max-width:440px;margin-bottom:34px;line-height:1.85}
.contact__right{display:grid;gap:14px}
.contact__row{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 26px;border:1px solid var(--border);
  border-radius:14px;background:var(--surface);transition:.3s var(--ease)}
.contact__row:hover{border-color:var(--teal);background:var(--surface-2);transform:translateX(4px)}
.contact__label{color:var(--muted);font-size:14px}
.contact__val{font-family:"Space Grotesk",sans-serif;font-size:15.5px}

/* ============ FOOTER ============ */
.footer{border-top:1px solid var(--border);padding:48px 0;background:var(--bg-2)}
.footer__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.brand--sm .brand__text strong{font-size:16px}
.brand--sm .brand__text em{letter-spacing:.3em}
.footer__nav{display:flex;gap:26px}
.footer__nav a{color:var(--muted);font-size:14px;transition:.25s}
.footer__nav a:hover{color:var(--text)}
.footer__copy{width:100%;color:var(--muted);font-size:13px;opacity:.7;border-top:1px solid var(--border);padding-top:24px;margin-top:8px}
.footer__copy a{color:var(--muted);transition:.25s}
.footer__copy a:hover{color:var(--text)}
.beian-gongan{display:inline-flex;align-items:center;gap:5px;vertical-align:middle}
.beian-gongan__icon{height:17px;width:auto;flex:none;display:block}

/* ============ REVEAL ============ */
.reveal{opacity:0;transform:translateY(28px);transition:.8s var(--ease) var(--d,0s)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important}
}

/* ============ RESPONSIVE ============ */
@media(max-width:920px){
  .engine{grid-template-columns:1fr;gap:32px;min-height:0}
  .hud{display:none}
  .tech__bg{width:100%;opacity:.18;
    mask-image:linear-gradient(180deg,transparent 0%,#000 16%,#000 66%,transparent 98%);
    -webkit-mask-image:linear-gradient(180deg,transparent 0%,#000 16%,#000 66%,transparent 98%);
    -webkit-mask-composite:source-over;mask-composite:add}
  .cards-4{grid-template-columns:repeat(2,1fr)}
  .contact__inner{grid-template-columns:1fr;gap:40px}
}
@media(max-width:760px){
  .nav__menu{position:fixed;inset:64px 0 auto 0;flex-direction:column;gap:0;background:rgba(5,8,15,.97);
    backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:10px 0;
    transform:translateY(-130%);transition:.4s var(--ease);align-items:stretch}
  .nav__menu.open{transform:translateY(0)}
  .nav__menu a{padding:16px 7vw;font-size:16px}
  .nav__menu a:not(.nav__cta)::after{display:none}
  .nav__cta{margin:12px 7vw;text-align:center;justify-content:center}
  .nav__menu .lang-switch{margin:6px 7vw 14px;align-self:flex-start}
  .nav__menu .lang-switch a{padding:9px 18px;font-size:15px}
  .nav__toggle{display:flex}
  .nav__toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav__toggle.open span:nth-child(2){opacity:0}
  .nav__toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .stats__grid,.cards-3{grid-template-columns:1fr}
  .truth{grid-template-columns:1fr;gap:18px;padding:30px 24px}
  .cards-4{grid-template-columns:1fr}
  .section{padding:64px 0}
  .stats{margin-top:0;padding-top:20px}
}