/* ═══════════════════════════════════════════════════════════
   Iron Stone — Counter-UAS
   Art direction: black canvas · white type · one sharp accent
   ═══════════════════════════════════════════════════════════ */

:root{
  --bg:#000;
  --bg-2:#0a0a0a;
  --bg-3:#111;
  --ink:#fff;
  --ink-70:rgba(255,255,255,.7);
  --ink-50:rgba(255,255,255,.5);
  --ink-30:rgba(255,255,255,.3);
  --ink-12:rgba(255,255,255,.12);
  --ink-06:rgba(255,255,255,.06);
  --red:#e60008;
  --red-dim:rgba(230,0,8,.15);
  --cyan:#4de2ff;

  --f-disp:'Barlow Condensed','Oswald','Arial Narrow',sans-serif;
  --f-body:'Inter','Helvetica Neue',Arial,'PingFang SC','Microsoft YaHei',sans-serif;
  --f-mono:'JetBrains Mono','SF Mono',Consolas,monospace;

  --pad:clamp(20px,5vw,88px);
  --maxw:1560px;
  --ease:cubic-bezier(.22,1,.36,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}

body{
  background:var(--bg);color:var(--ink);
  font-family:var(--f-body);font-weight:300;
  font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.is-locked{overflow:hidden;height:100vh}

img,svg,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--red);color:#fff}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}

/* ── scrollbar ── */
::-webkit-scrollbar{width:9px}
::-webkit-scrollbar-track{background:#000}
::-webkit-scrollbar-thumb{background:#2a2a2a}
::-webkit-scrollbar-thumb:hover{background:var(--red)}

/* ═══ LOADER ═══ */
.loader{
  position:fixed;inset:0;z-index:9999;background:#000;
  display:grid;place-items:center;
}
.loader__inner{width:min(560px,80vw);text-align:center}
.loader__mark{
  font-family:var(--f-disp);font-weight:700;
  font-size:clamp(30px,5.2vw,54px);letter-spacing:.18em;
  text-indent:.18em;line-height:1;margin-bottom:26px;
  white-space:nowrap;
}
.loader__bar{height:2px;background:var(--ink-12);overflow:hidden}
.loader__bar span{display:block;height:100%;width:0;background:var(--red)}
.loader__pct{
  font-family:var(--f-mono);font-size:11px;color:var(--ink-50);
  margin-top:12px;letter-spacing:.16em;
}
.loader.is-done{pointer-events:none}

/* ═══ HEADER ═══ */
.hdr{
  position:fixed;top:0;left:0;right:0;z-index:900;
  display:flex;align-items:center;gap:32px;
  padding:20px var(--pad);
  transition:background .45s var(--ease),backdrop-filter .45s,padding .45s var(--ease),border-color .45s;
  border-bottom:1px solid transparent;
}
.hdr.is-stuck{
  background:rgba(0,0,0,.72);backdrop-filter:blur(18px) saturate(1.4);
  border-bottom-color:var(--ink-12);padding-block:13px;
}
.hdr.is-hidden{transform:translateY(-100%)}
.hdr{transition:transform .5s var(--ease),background .45s var(--ease),padding .45s var(--ease),border-color .45s}

.hdr__logo{display:flex;align-items:center;gap:11px;flex:none}
.hdr__logo-mark{
  width:15px;height:15px;background:var(--red);flex:none;
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.hdr__logo-txt{
  font-family:var(--f-disp);font-weight:700;font-size:23px;
  letter-spacing:.13em;line-height:1;display:flex;align-items:baseline;gap:9px;
}
.hdr__logo-txt em{
  font-family:var(--f-body);font-style:normal;font-weight:400;
  font-size:11px;letter-spacing:.14em;color:var(--ink-50);
}
.hdr__nav{display:flex;gap:34px;margin-left:auto}
.hdr__nav a{
  position:relative;font-size:13px;letter-spacing:.09em;
  text-transform:uppercase;color:var(--ink-70);padding-block:5px;
  transition:color .3s;
}
.hdr__nav a::after{
  content:'';position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--red);transform:scaleX(0);transform-origin:right;
  transition:transform .45s var(--ease);
}
.hdr__nav a:hover{color:var(--ink)}
.hdr__nav a:hover::after{transform:scaleX(1);transform-origin:left}

.hdr__cta{
  flex:none;font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  padding:11px 20px;border:1px solid var(--ink-30);
  transition:background .35s,border-color .35s,color .35s;
}
.hdr__cta:hover{background:var(--red);border-color:var(--red);color:#fff}

/* ── language switch ── */
.lang{display:flex;flex:none;border:1px solid var(--ink-12)}
.lang__btn{
  font-family:var(--f-mono);font-size:11px;letter-spacing:.12em;
  padding:9px 13px;color:var(--ink-50);line-height:1;
  transition:background .3s var(--ease),color .3s var(--ease);
}
.lang__btn + .lang__btn{border-left:1px solid var(--ink-12)}
.lang__btn:hover{color:var(--ink)}
.lang__btn.is-on{background:var(--red);color:#fff}

.hdr__burger{display:none;flex-direction:column;gap:6px;width:26px;flex:none}
.hdr__burger span{display:block;height:1.5px;background:#fff;transition:transform .4s var(--ease),opacity .3s}
.hdr__burger.is-open span:nth-child(1){transform:translateY(3.75px) rotate(45deg)}
.hdr__burger.is-open span:nth-child(2){transform:translateY(-3.75px) rotate(-45deg)}

.menu{
  position:fixed;inset:0;z-index:880;background:#000;
  display:grid;place-items:center;
  clip-path:inset(0 0 100% 0);transition:clip-path .7s var(--ease);
  pointer-events:none;
}
.menu.is-open{clip-path:inset(0 0 0 0);pointer-events:auto}
.menu nav{display:flex;flex-direction:column;gap:6px;padding:0 var(--pad)}
.menu a{
  font-family:var(--f-disp);font-weight:600;font-size:clamp(34px,9vw,58px);
  line-height:1.12;letter-spacing:.02em;display:flex;align-items:baseline;gap:16px;
  transition:color .3s;
}
.menu a i{
  font-family:var(--f-mono);font-style:normal;font-size:12px;
  color:var(--red);letter-spacing:.1em;
}
.menu a:hover{color:var(--red)}

/* ═══ SHARED SECTION FURNITURE ═══ */
section{position:relative}
.sec-head{max-width:1000px;margin-bottom:clamp(46px,6vw,86px)}
.sec-label{
  display:flex;align-items:center;gap:12px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--ink-50);margin-bottom:22px;
}
.sec-label i{
  font-style:normal;color:var(--red);font-weight:500;
  padding-right:12px;border-right:1px solid var(--ink-12);
}
.sec-title{
  font-family:var(--f-disp);font-weight:600;
  font-size:clamp(38px,6.2vw,88px);line-height:.98;
  letter-spacing:-.005em;text-transform:uppercase;
}
.sec-title em{font-style:normal;color:var(--red)}
.sec-lede{
  margin-top:26px;max-width:66ch;font-size:clamp(15px,1.15vw,18px);
  color:var(--ink-70);line-height:1.72;
}
.sec-lede em{font-style:normal;color:var(--ink);font-weight:400}

.btn{
  display:inline-flex;align-items:center;gap:12px;
  padding:16px 28px;font-size:13px;letter-spacing:.1em;
  text-transform:uppercase;border:1px solid transparent;
  transition:background .35s var(--ease),color .35s,border-color .35s;
}
.btn__arrow{transition:transform .4s var(--ease)}
.btn:hover .btn__arrow{transform:translateX(6px)}
.btn--primary{background:var(--red);color:#fff}
.btn--primary:hover{background:#ff1a22}
.btn--ghost{border-color:var(--ink-30);color:var(--ink)}
.btn--ghost:hover{border-color:var(--ink);background:var(--ink);color:#000}

/* text reveal */
.reveal-text{overflow:hidden}
.reveal-text .rt-line{display:block;overflow:hidden}
.reveal-text .rt-line>span{display:block;will-change:transform}

/* ═══ HERO ═══ */
.hero{
  position:relative;min-height:100svh;
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:0 0 0;overflow:hidden;
}
.hero__radar{position:absolute;inset:0;width:100%;height:100%;opacity:.55}
.hero__grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(var(--ink-06) 1px,transparent 1px),
                   linear-gradient(90deg,var(--ink-06) 1px,transparent 1px);
  background-size:clamp(60px,7vw,110px) clamp(60px,7vw,110px);
  mask-image:radial-gradient(ellipse 90% 75% at 50% 45%,#000 20%,transparent 100%);
}
.hero__vignette{
  position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 75% 60% at 50% 42%,transparent 0%,rgba(0,0,0,.55) 62%,#000 100%),
             linear-gradient(to top,#000 2%,transparent 32%);
}
.hero__content{
  position:relative;z-index:3;width:100%;max-width:var(--maxw);
  margin-inline:auto;padding:0 var(--pad);
  padding-bottom:clamp(40px,6vh,74px);
}
.hero__eyebrow{
  display:inline-flex;align-items:center;gap:11px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink-70);
  border:1px solid var(--ink-12);padding:8px 16px;margin-bottom:clamp(22px,3vh,38px);
}
.hero__eyebrow .dot{
  width:6px;height:6px;border-radius:50%;background:var(--red);
  box-shadow:0 0 0 0 rgba(230,0,8,.6);animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(230,0,8,.55)}
  70%{box-shadow:0 0 0 12px rgba(230,0,8,0)}
  100%{box-shadow:0 0 0 0 rgba(230,0,8,0)}
}
.hero__title{
  font-family:var(--f-disp);font-weight:700;
  font-size:clamp(62px,13.5vw,220px);line-height:.86;
  letter-spacing:-.015em;text-transform:uppercase;margin-bottom:clamp(24px,3vh,36px);
}
.hero__title .line{display:block;overflow:hidden}
.hero__title .line>span{display:block;will-change:transform}
.hero__title em{font-style:normal;color:var(--red)}
.hero__sub{
  max-width:58ch;font-size:clamp(15px,1.25vw,19px);
  color:var(--ink-70);line-height:1.7;margin-bottom:clamp(26px,3.4vh,42px);
}
.hero__sub strong{
  display:block;margin-top:12px;color:var(--ink);font-weight:500;
  font-family:var(--f-mono);font-size:.86em;letter-spacing:.04em;
}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px}

.hero__ticker{
  position:relative;z-index:3;border-top:1px solid var(--ink-12);
  border-bottom:1px solid var(--ink-12);overflow:hidden;
  padding-block:13px;background:rgba(0,0,0,.4);
}
.ticker__track{
  display:flex;gap:0;white-space:nowrap;width:max-content;
  will-change:transform;
}
.ticker__track span{
  display:inline-flex;align-items:center;gap:12px;padding-inline:26px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-50);
}
.ticker__track span::before{
  content:'';width:5px;height:5px;background:var(--red);flex:none;
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.hero__scroll{
  position:absolute;right:var(--pad);bottom:calc(clamp(40px,6vh,74px) + 58px);
  z-index:4;display:flex;flex-direction:column;align-items:center;gap:12px;
}
.hero__scroll span{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--ink-50);
  writing-mode:vertical-rl;
}
.hero__scroll-line{width:1px;height:64px;background:var(--ink-12);overflow:hidden}
.hero__scroll-line i{
  display:block;width:100%;height:26px;background:var(--red);
  animation:scrolldot 2.1s var(--ease) infinite;
}
@keyframes scrolldot{
  0%{transform:translateY(-100%)}
  60%,100%{transform:translateY(260%)}
}

/* ═══ INTRO ═══ */
.intro{padding:clamp(90px,13vh,170px) 0}
.intro__grid{
  display:grid;grid-template-columns:1.1fr .9fr;
  gap:clamp(40px,5vw,90px);align-items:start;
}
.intro__lead h2{
  font-family:var(--f-disp);font-weight:600;
  font-size:clamp(32px,4.4vw,64px);line-height:1.02;
  text-transform:uppercase;letter-spacing:-.005em;
}
.intro__lead h2 em{font-style:normal;color:var(--red)}
.intro__body p{font-size:clamp(15px,1.15vw,18px);color:var(--ink-70);line-height:1.75}
.creds{margin-top:38px;border-top:1px solid var(--ink-12)}
.creds li{
  display:grid;grid-template-columns:170px 1fr;gap:22px;
  padding:20px 0;border-bottom:1px solid var(--ink-12);align-items:baseline;
}
.creds strong{
  font-family:var(--f-mono);font-size:11px;font-weight:500;
  letter-spacing:.13em;text-transform:uppercase;color:var(--red);
}
.creds span{font-size:14px;color:var(--ink-70);line-height:1.55}

/* ═══ CAPABILITY ═══ */
.caps{padding:clamp(80px,11vh,150px) 0;border-top:1px solid var(--ink-12)}
.caps__grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--ink-12);
}
.cap{
  padding:clamp(30px,3vw,46px) clamp(20px,2.2vw,36px) clamp(34px,4vw,54px);
  border-right:1px solid var(--ink-12);position:relative;
}
.cap:last-child{border-right:0}
.cap::after{
  content:'';position:absolute;top:-1px;left:0;height:2px;width:100%;
  background:var(--red);transform:scaleX(0);transform-origin:left;
  transition:transform .9s var(--ease);
}
.cap.is-in::after{transform:scaleX(1)}
.cap__num{
  font-family:var(--f-disp);font-weight:700;
  font-size:clamp(56px,7vw,108px);line-height:.9;
  display:flex;align-items:baseline;gap:4px;letter-spacing:-.02em;
}
.cap__num em{font-style:normal;font-size:.36em;color:var(--red);font-weight:600}
.cap__label{
  margin-top:14px;font-family:var(--f-mono);font-size:11px;
  letter-spacing:.15em;text-transform:uppercase;color:var(--ink);
}
.cap p{margin-top:14px;font-size:13.5px;color:var(--ink-50);line-height:1.65}

/* ═══ PILLARS (pinned) ═══ */
.pillars{height:320vh;position:relative}
.pillars__sticky{
  position:sticky;top:0;height:100svh;
  display:flex;align-items:center;overflow:hidden;
  border-top:1px solid var(--ink-12);
}
.pillars__head{margin-bottom:clamp(30px,5vh,60px)}
.pillars__stage{position:relative;min-height:clamp(340px,44vh,430px)}
.pillar{
  position:absolute;inset:0;max-width:920px;
  opacity:0;visibility:hidden;
}
.pillar.is-active{opacity:1;visibility:visible}
.pillar__idx{
  font-family:var(--f-disp);font-weight:700;
  font-size:clamp(70px,11vw,168px);line-height:.8;
  color:transparent;-webkit-text-stroke:1px var(--ink-30);
  margin-bottom:clamp(10px,2vh,22px);
}
.pillar h3{
  font-family:var(--f-disp);font-weight:600;
  font-size:clamp(30px,4.4vw,64px);line-height:1.02;
  text-transform:uppercase;margin-bottom:20px;
}
.pillar p{
  max-width:62ch;font-size:clamp(15px,1.2vw,19px);
  color:var(--ink-70);line-height:1.72;
}
.pillar p em{font-style:normal;color:var(--ink);font-weight:400}
.pillar__tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:26px}
.pillar__tags span{
  font-family:var(--f-mono);font-size:10.5px;letter-spacing:.13em;
  text-transform:uppercase;color:var(--ink-70);
  border:1px solid var(--ink-12);padding:7px 13px;
}
.pillars__rail{display:flex;gap:8px;margin-top:clamp(30px,5vh,58px)}
.pillars__rail i{
  display:block;height:2px;width:64px;background:var(--ink-12);
  position:relative;overflow:hidden;
}
.pillars__rail i::after{
  content:'';position:absolute;inset:0;background:var(--red);
  transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease);
}
.pillars__rail i.is-on::after{transform:scaleX(1)}

/* ═══ TECHNOLOGY ═══ */
.tech{padding:clamp(90px,13vh,170px) 0;border-top:1px solid var(--ink-12)}
.tech__grid{
  display:grid;grid-template-columns:.85fr 1.15fr;
  gap:clamp(40px,5vw,90px);align-items:start;
}
.tech__viz{position:sticky;top:120px}
.tdoa{width:100%;height:auto;overflow:visible}
.tdoa__grid path{stroke:var(--ink-06);stroke-width:1}
.tdoa__rings circle{fill:none;stroke:rgba(230,0,8,.28);stroke-width:1;stroke-dasharray:3 5}
.tdoa__links line{
  stroke:var(--ink-30);stroke-width:1;stroke-dasharray:4 4;
}
.tdoa__nodes rect{fill:none;stroke:#fff;stroke-width:1.5}
.tdoa__nodes text{
  fill:var(--ink-50);font-family:var(--f-mono);font-size:9px;
  letter-spacing:.14em;text-anchor:middle;
}
.tdoa__target path{stroke:var(--red);stroke-width:2}
.tdoa__pulse{fill:none;stroke:var(--red);stroke-width:1;opacity:.55}
.tdoa__target text{
  fill:var(--red);font-family:var(--f-mono);font-size:9.5px;
  letter-spacing:.16em;text-anchor:middle;
}
.tdoa__target text.mono{fill:var(--ink-50);letter-spacing:.1em}

.techrow{
  display:grid;grid-template-columns:110px 1fr;gap:clamp(18px,2.2vw,42px);
  padding:clamp(24px,2.6vw,36px) 0;border-top:1px solid var(--ink-12);
}
.techrow:last-child{border-bottom:1px solid var(--ink-12)}
.techrow__k{
  font-family:var(--f-mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;color:var(--red);padding-top:5px;
}
.techrow h4{
  font-family:var(--f-disp);font-weight:600;font-size:clamp(20px,1.9vw,29px);
  text-transform:uppercase;letter-spacing:.005em;margin-bottom:10px;line-height:1.1;
}
.techrow p{font-size:14.5px;color:var(--ink-50);line-height:1.7;max-width:62ch}
.techrow p em{font-style:normal;color:var(--ink-70)}

/* ═══ PRODUCTS ═══ */
.prod{padding:clamp(90px,13vh,170px) 0;border-top:1px solid var(--ink-12)}
.series{border-top:1px solid var(--ink-12)}

.srow{border-bottom:1px solid var(--ink-12)}
.srow__bar{
  /* minmax(0,1fr): a plain 1fr floors at min-content, so a long series name
     ("EAGLE EYE Optoelectronic") would widen its track and shove the meta
     column past the bar. */
  display:grid;grid-template-columns:88px minmax(0,1fr) auto;
  gap:clamp(16px,2.4vw,44px);align-items:center;
  padding:clamp(26px,3.2vw,46px) 0;cursor:pointer;
  position:relative;transition:padding-left .5s var(--ease);
}
.srow__bar::before{
  content:'';position:absolute;left:calc(var(--pad) * -1);top:0;bottom:0;
  width:calc(100% + var(--pad) * 2);background:var(--bg-2);
  opacity:0;transition:opacity .45s var(--ease);z-index:-1;
}
.srow__bar:hover::before{opacity:1}
.srow__bar:hover{padding-left:18px}
.srow__idx{
  font-family:var(--f-mono);font-size:12px;letter-spacing:.14em;
  color:var(--red);align-self:start;padding-top:8px;
}
.srow__name{
  font-family:var(--f-disp);font-weight:600;
  font-size:clamp(28px,4.2vw,62px);line-height:1;
  text-transform:uppercase;letter-spacing:-.005em;
  overflow-wrap:anywhere;
  transition:color .4s;
}
.srow__bar:hover .srow__name{color:var(--red)}
.srow__cn{
  font-family:var(--f-body);font-size:13px;font-weight:300;
  color:var(--ink-50);letter-spacing:.1em;margin-top:10px;
}
.srow__meta{
  display:flex;align-items:center;gap:22px;flex:none;
}
.srow__count{
  font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;
  color:var(--ink-50);text-transform:uppercase;
}
.srow__toggle{
  width:38px;height:38px;border:1px solid var(--ink-30);flex:none;
  position:relative;transition:background .35s,border-color .35s,transform .5s var(--ease);
}
.srow__toggle::before,.srow__toggle::after{
  content:'';position:absolute;top:50%;left:50%;background:#fff;
  transform:translate(-50%,-50%);transition:transform .45s var(--ease),background .35s;
}
.srow__toggle::before{width:13px;height:1.5px}
.srow__toggle::after{width:1.5px;height:13px}
.srow__bar:hover .srow__toggle{border-color:var(--red);background:var(--red)}
.srow.is-open .srow__toggle{background:var(--red);border-color:var(--red)}
.srow.is-open .srow__toggle::after{transform:translate(-50%,-50%) scaleY(0)}

.srow__panel{height:0;overflow:hidden}
.srow__inner{padding-bottom:clamp(34px,4vw,64px)}
.srow__lede{
  max-width:70ch;font-size:clamp(15px,1.15vw,17.5px);
  color:var(--ink-70);line-height:1.72;margin-bottom:34px;
  padding-left:calc(88px + clamp(16px,2.4vw,44px));
}
.feat{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(268px,1fr));
  gap:1px;background:var(--ink-12);border:1px solid var(--ink-12);
  margin-bottom:clamp(32px,4vw,56px);
}
.feat li{background:var(--bg);padding:22px 24px;transition:background .4s}
.feat li:hover{background:var(--bg-3)}
.feat strong{
  display:block;font-family:var(--f-disp);font-weight:600;font-size:19px;
  text-transform:uppercase;letter-spacing:.01em;margin-bottom:8px;
}
.feat span{font-size:13px;color:var(--ink-50);line-height:1.6}

.dev{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));
  gap:clamp(14px,1.4vw,22px);
}
.devcard{
  border:1px solid var(--ink-12);padding:clamp(24px,2.4vw,34px);
  background:var(--bg-2);display:flex;flex-direction:column;
  position:relative;overflow:hidden;transition:border-color .45s,background .45s;
}
.devcard:hover{border-color:var(--ink-30);background:var(--bg-3)}
.devcard--hl{background:var(--bg-3)}
.devcard--hl::before{
  content:attr(data-flag);position:absolute;top:0;right:0;
  font-family:var(--f-mono);font-size:9px;letter-spacing:.18em;
  background:var(--red);color:#fff;padding:5px 11px;
}
.devcard__head{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:14px;flex-wrap:wrap;margin-bottom:6px;padding-right:70px;
}
.devcard__code{
  font-family:var(--f-disp);font-weight:700;
  font-size:clamp(26px,2.5vw,38px);line-height:1;
  text-transform:uppercase;letter-spacing:.01em;
}
.devcard__form{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--red);border:1px solid var(--red-dim);
  padding:5px 10px;flex:none;
}
.devcard__alias{
  font-size:12px;color:var(--ink-50);letter-spacing:.05em;margin-bottom:8px;
}
.devcard__en{
  font-size:12.5px;color:var(--ink-50);line-height:1.5;
  padding-bottom:16px;border-bottom:1px solid var(--ink-12);margin-bottom:16px;
}
.devcard__desc{font-size:14px;color:var(--ink-70);line-height:1.68;margin-bottom:22px}
.spec{margin-top:auto;border-top:1px solid var(--ink-12)}
.spec div{
  display:grid;grid-template-columns:minmax(115px,.5fr) 1fr;gap:16px;
  padding:11px 0;border-bottom:1px solid var(--ink-06);align-items:baseline;
}
.spec div:last-child{border-bottom:0}
.spec dt{
  font-family:var(--f-mono);font-size:10.5px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-50);
}
.spec dd{font-size:13px;color:var(--ink);line-height:1.5}

/* ═══ SPEC RAIL ═══ */
.rail{height:420vh;border-top:1px solid var(--ink-12)}
.rail__sticky{
  position:sticky;top:0;height:100svh;overflow:hidden;
  display:flex;flex-direction:column;justify-content:center;gap:clamp(28px,4vh,52px);
}
.rail__head .sec-title{font-size:clamp(32px,4.6vw,66px)}
.rail__track{display:flex;gap:clamp(14px,1.4vw,22px);padding-inline:var(--pad);will-change:transform}
.railcard{
  flex:none;width:clamp(280px,26vw,400px);
  border:1px solid var(--ink-12);background:var(--bg-2);
  padding:clamp(24px,2.2vw,34px);display:flex;flex-direction:column;
  transition:border-color .4s,background .4s;
}
.railcard:hover{border-color:var(--red);background:var(--bg-3)}
.railcard__series{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--red);margin-bottom:16px;
}
.railcard__code{
  font-family:var(--f-disp);font-weight:700;
  font-size:clamp(32px,3.4vw,50px);line-height:.96;text-transform:uppercase;
}
.railcard__form{font-size:12px;color:var(--ink-50);margin-top:8px;letter-spacing:.06em}
.railcard__k{
  margin:clamp(24px,3vw,40px) 0 0;padding-top:22px;border-top:1px solid var(--ink-12);
  font-family:var(--f-disp);font-weight:700;font-size:clamp(38px,4vw,58px);
  line-height:.95;color:var(--red);
}
.railcard__kl{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.15em;
  text-transform:uppercase;color:var(--ink-50);margin-top:8px;
}
.railcard__s{margin-top:auto;padding-top:24px}
.railcard__s li{
  font-size:12.5px;color:var(--ink-70);padding:8px 0;
  border-bottom:1px solid var(--ink-06);display:flex;gap:10px;align-items:baseline;
}
.railcard__s li::before{content:'';width:4px;height:4px;background:var(--red);flex:none}
.railcard__s li:last-child{border-bottom:0}

/* ═══ ARCHITECTURE ═══ */
.arch{padding:clamp(90px,13vh,170px) 0;border-top:1px solid var(--ink-12)}
.arch__stage{
  display:grid;grid-template-columns:1.05fr minmax(0,.95fr);
  gap:clamp(40px,5vw,90px);align-items:start;
}
.arch__rings{
  position:relative;aspect-ratio:1;width:100%;max-width:620px;
  margin-inline:auto;display:grid;place-items:center;
}
.ring{
  position:absolute;border-radius:50%;border:1px solid var(--ink-12);
  display:grid;place-items:start center;
}
/* Short single words only. Full descriptions live in .arch__tiers below —
   long labels here stacked into one illegible column as the rings shrank. */
.ring span{
  font-family:var(--f-mono);font-size:9.5px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink-50);
  transform:translateY(-50%);background:var(--bg);padding:0 10px;white-space:nowrap;
}
.ring--1{width:44%;height:44%;border-color:rgba(230,0,8,.5)}
.ring--1 span{color:var(--red)}
.ring--2{width:72%;height:72%}
.ring--3{width:100%;height:100%}
.arch__core{
  position:relative;z-index:3;display:grid;place-items:center;gap:12px;text-align:center;
}
.arch__core i{
  width:16px;height:16px;background:var(--red);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
  box-shadow:0 0 0 0 rgba(230,0,8,.6);animation:pulse 2.6s infinite;
}
.arch__core b{
  font-family:var(--f-mono);font-size:10px;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;color:var(--ink-70);
}
/* ── live engagement simulation ── */
.arch__fx{
  position:absolute;inset:0;width:100%;height:100%;
  overflow:visible;pointer-events:none;z-index:2;
}
.fx__lane{
  fill:none;stroke:rgba(255,255,255,.14);stroke-width:1;
  vector-effect:non-scaling-stroke;stroke-dasharray:3 6;
}
.fx__beam{
  stroke:var(--red);stroke-width:1.4;vector-effect:non-scaling-stroke;
  stroke-dasharray:6 4;stroke-linecap:round;opacity:0;
  filter:drop-shadow(0 0 4px rgba(230,0,8,.85));
}

.unit{
  position:absolute;transform:translate(-50%,-50%);z-index:4;
  display:flex;flex-direction:column;align-items:center;gap:7px;
  pointer-events:none;white-space:nowrap;
}
.unit i{display:block;position:relative;flex:none}
.unit b{
  font-family:var(--f-mono);font-weight:500;
  font-size:clamp(7px,.6vw,9px);letter-spacing:.14em;
  text-transform:uppercase;line-height:1;
  background:rgba(0,0,0,.74);padding:3px 6px;
}

/* defence platform — roams the periphery band */
.unit--dev i{
  width:13px;height:13px;border:1.5px solid #fff;background:rgba(0,0,0,.65);
}
.unit--dev i::after{content:'';position:absolute;inset:3px;background:#fff}
.unit--dev b{color:#fff;border:1px solid var(--ink-30)}
.unit--dev.is-firing i{
  border-color:var(--red);box-shadow:0 0 16px 3px rgba(230,0,8,.75);
}
.unit--dev.is-firing i::after{background:var(--red)}

/* fixed-site emplacement — static ring marks it as permanently sited */
.unit--fixed i{border-radius:50%}
.unit--fixed i::before{
  content:'';position:absolute;inset:-5px;
  border:1px solid var(--ink-30);border-radius:50%;
}
.unit--fixed i::after{border-radius:50%}

/* cooperative — whitelisted, orbits between core and outer */
.unit--coop i{
  width:10px;height:10px;border-radius:50%;background:#fff;
  box-shadow:0 0 12px 3px rgba(255,255,255,.5);
}
.unit--coop b{color:var(--ink-70)}

/* non-cooperative — inbound, engaged at the periphery */
.unit--hostile i{
  width:10px;height:10px;border-radius:50%;background:var(--red);
  box-shadow:0 0 14px 3px rgba(230,0,8,.7);
}
.unit--hostile b{color:var(--red)}
.unit__x{
  position:absolute;top:5px;left:50%;width:26px;height:26px;
  transform:translate(-50%,-50%);opacity:0;
}
.unit__x::before,.unit__x::after{
  content:'';position:absolute;top:50%;left:0;
  width:100%;height:2.5px;margin-top:-1.25px;
  background:var(--red);border-radius:2px;
  box-shadow:0 0 8px rgba(230,0,8,.9);
}
.unit__x::before{transform:rotate(45deg)}
.unit__x::after{transform:rotate(-45deg)}

/* Three distinct blocks, not one grey mass: each gets its own tinted panel,
   a clear gap between them, and a swatch that reads at a glance. */
.arch__legend{display:flex;flex-direction:column;gap:14px}
.arch__legend li{
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:20px;align-items:start;
  padding:26px 28px;
  background:var(--bg-2);border:1px solid var(--ink-12);
  transition:background .4s var(--ease),border-color .4s var(--ease);
}
.arch__legend li:hover{background:var(--bg-3);border-color:var(--ink-30)}
.sw{
  width:13px;height:13px;margin-top:7px;flex:none;display:block;
  box-shadow:0 0 0 4px rgba(255,255,255,.05);
}
.sw--red{background:var(--red);box-shadow:0 0 0 4px rgba(230,0,8,.16)}
.sw--white{background:#fff}
.sw--grey{background:var(--ink-30)}
.arch__legend strong{
  display:block;font-family:var(--f-disp);font-weight:600;font-size:23px;
  line-height:1.1;text-transform:uppercase;margin-bottom:11px;
}
.arch__legend span{
  display:block;font-size:13.5px;color:var(--ink-50);line-height:1.7;max-width:52ch;
}

/* ── tier key beneath the rings ── */
.arch__diagram{display:flex;flex-direction:column;gap:clamp(28px,3.4vw,46px)}
.arch__tiers{
  display:flex;flex-direction:column;gap:1px;
  background:var(--ink-12);border:1px solid var(--ink-12);
}
.arch__tiers li{
  display:grid;grid-template-columns:96px minmax(0,1fr);gap:20px;
  background:var(--bg);padding:18px 22px;align-items:baseline;
  transition:background .4s var(--ease);
}
.arch__tiers li:hover{background:var(--bg-3)}
.arch__tiers b{
  font-family:var(--f-mono);font-size:10.5px;font-weight:500;
  letter-spacing:.18em;text-transform:uppercase;color:var(--red);
}
.arch__tiers span{font-size:13px;color:var(--ink-50);line-height:1.65}

/* ═══ SECTORS ═══ */
.sect{padding:clamp(90px,13vh,170px) 0;border-top:1px solid var(--ink-12)}
.sect__marquee{
  overflow:hidden;border-block:1px solid var(--ink-12);
  padding-block:clamp(16px,2vw,26px);margin-bottom:clamp(48px,6vw,84px);
}
.sect__marquee .mq{display:flex;width:max-content;will-change:transform}
.sect__marquee .mq span{
  font-family:var(--f-disp);font-weight:600;
  font-size:clamp(30px,4.4vw,64px);text-transform:uppercase;
  padding-inline:clamp(20px,2.4vw,40px);color:var(--ink-30);
  display:inline-flex;align-items:center;gap:clamp(20px,2.4vw,40px);
  white-space:nowrap;transition:color .4s;
}
.sect__marquee .mq span::after{
  content:'';width:9px;height:9px;background:var(--red);flex:none;
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}
.sect__marquee .mq span:hover{color:var(--ink)}
.sect__grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(276px,1fr));
  gap:1px;background:var(--ink-12);border:1px solid var(--ink-12);
}
.sect__grid li{
  background:var(--bg);padding:clamp(24px,2.2vw,32px);
  transition:background .45s var(--ease);position:relative;
}
.sect__grid li:hover{background:var(--bg-3)}
.sect__grid i{
  font-family:var(--f-mono);font-style:normal;font-size:10px;
  letter-spacing:.15em;color:var(--red);display:block;margin-bottom:14px;
}
.sect__grid strong{
  display:block;font-family:var(--f-disp);font-weight:600;font-size:22px;
  text-transform:uppercase;line-height:1.1;margin-bottom:9px;
}
.sect__grid p{font-size:13px;color:var(--ink-50);line-height:1.6}

/* ═══ CTA ═══ */
.cta{
  padding:clamp(100px,15vh,190px) 0;border-top:1px solid var(--ink-12);
  position:relative;overflow:hidden;
}
.cta::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 60% 80% at 50% 100%,rgba(230,0,8,.13),transparent 65%);
}
.cta__inner{position:relative;max-width:960px}
.cta__title{
  font-family:var(--f-disp);font-weight:700;
  font-size:clamp(42px,7.4vw,120px);line-height:.95;
  text-transform:uppercase;letter-spacing:-.01em;margin-bottom:26px;
}
.cta__inner>p{
  max-width:62ch;font-size:clamp(15px,1.2vw,18px);
  color:var(--ink-70);line-height:1.72;margin-bottom:38px;
}
.cta__row{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:clamp(48px,6vw,80px)}
.cta__meta{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:1px;background:var(--ink-12);border:1px solid var(--ink-12);
}
.cta__meta>div{background:var(--bg);padding:24px}
.cta__meta dt{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--red);margin-bottom:10px;
}
.cta__meta dd{font-size:14px;color:var(--ink-70);line-height:1.55}

/* ═══ FOOTER ═══ */
.ftr{border-top:1px solid var(--ink-12);padding:34px 0}
.ftr__in{
  display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;
  font-size:12px;color:var(--ink-50);
}
.ftr__note{max-width:56ch;color:var(--ink-30)}

/* ═══ RESPONSIVE ═══ */
@media (max-width:1180px){
  .hdr__nav{display:none}
  .hdr__cta{display:none}
  .lang{margin-left:auto}          /* keep the switch reachable without the nav */
  .hdr__burger{display:flex}
  .caps__grid{grid-template-columns:repeat(2,1fr)}
  .cap:nth-child(2){border-right:0}
  .cap:nth-child(1),.cap:nth-child(2){border-bottom:1px solid var(--ink-12)}
  .tech__grid,.arch__stage,.intro__grid{grid-template-columns:1fr}
  .tech__viz{position:static;max-width:520px}
  .rail{height:340vh}
}
@media (max-width:760px){
  /* "IRON STONE" + tagline + language switch + burger will not fit at this
     width — drop the tagline and tighten the row rather than let it spill */
  .hdr{gap:14px}
  .hdr__logo-txt{font-size:17px;letter-spacing:.08em}
  .hdr__logo-txt em{display:none}
  .lang__btn{padding:7px 9px;font-size:10px;letter-spacing:.08em}
  .hero__scroll{display:none}
  .caps__grid{grid-template-columns:1fr}
  .cap{border-right:0;border-bottom:1px solid var(--ink-12)}
  .cap:last-child{border-bottom:0}
  .creds li{grid-template-columns:1fr;gap:8px}
  .techrow{grid-template-columns:1fr;gap:12px}
  .srow__bar{grid-template-columns:52px minmax(0,1fr) auto;gap:14px}
  .srow__lede{padding-left:0}
  .spec div{grid-template-columns:1fr;gap:4px}
  .pillars{height:300vh}
  .rail{height:300vh}
  .ring span{font-size:8px;letter-spacing:.12em;padding:0 7px}
  .arch__legend li{padding:22px 20px;gap:16px}
  .arch__legend strong{font-size:20px}
  .arch__tiers li{grid-template-columns:1fr;gap:7px;padding:16px 18px}
  /* three inbound labels crowd a 335px diagram — the marker and the legend
     carry the meaning; the platform codes are the labels worth keeping */
  .unit--hostile b{display:none}
}

/* ═══ CHINESE TYPOGRAPHY ═══
   The Latin design runs on a condensed uppercase display face. Neither
   condensing nor uppercasing means anything for Hanzi, and the wide
   display tracking pulls Chinese characters apart, so the type system
   is re-tuned rather than merely re-fonted. System CJK faces are used
   deliberately — they render natively on the reader's platform and cost
   no download, unlike a ~2 MB webfont. */
html[lang="zh-CN"]{
  --f-disp:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Source Han Sans SC','Noto Sans CJK SC',sans-serif;
  --f-body:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Source Han Sans SC',sans-serif;
}
html[lang="zh-CN"] body{font-weight:400}
html[lang="zh-CN"] .sec-title,
html[lang="zh-CN"] .hero__title,
html[lang="zh-CN"] .cta__title,
html[lang="zh-CN"] .intro__lead h2,
html[lang="zh-CN"] .pillar h3,
html[lang="zh-CN"] .srow__name,
html[lang="zh-CN"] .techrow h4,
html[lang="zh-CN"] .feat strong,
html[lang="zh-CN"] .sect__grid strong,
html[lang="zh-CN"] .arch__legend strong,
html[lang="zh-CN"] .sect__marquee .mq span{
  text-transform:none;letter-spacing:.01em;font-weight:700;
}
html[lang="zh-CN"] .hero__title{font-size:clamp(54px,11vw,180px);line-height:1.02}
html[lang="zh-CN"] .sec-title{line-height:1.12}
html[lang="zh-CN"] .intro__lead h2{line-height:1.28}
html[lang="zh-CN"] .pillar h3{line-height:1.2}
html[lang="zh-CN"] .cta__title{line-height:1.16}
html[lang="zh-CN"] .srow__name{line-height:1.14}
/* mono labels: keep Latin tracking, drop it where Hanzi appears */
html[lang="zh-CN"] .sec-label,
html[lang="zh-CN"] .cap__label,
html[lang="zh-CN"] .arch__tiers b,
html[lang="zh-CN"] .railcard__kl,
html[lang="zh-CN"] .cta__meta dt,
html[lang="zh-CN"] .spec dt{letter-spacing:.06em;text-transform:none}
html[lang="zh-CN"] .pillar__tags span,
html[lang="zh-CN"] .devcard__form,
html[lang="zh-CN"] .unit b,
html[lang="zh-CN"] .ring span{letter-spacing:.05em;text-transform:none}
/* Chinese has no spaces — let long strings break rather than overflow */
html[lang="zh-CN"] .srow__name,
html[lang="zh-CN"] .sec-title,
html[lang="zh-CN"] .cta__title{overflow-wrap:anywhere}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;animation-iteration-count:1!important;
    transition-duration:.01ms!important;
  }
}