:root {
  --bg: #f3f4f2;
  --bg2: #ffffff;
  --panel: #ffffff;
  --line: #dde1e4;
  --line2: #c6cdd3;
  --text: #11161c;
  --muted: #55606b;
  --dim: #8a939c;
  --ink: #b36800;
  --green-ink: #0d8a42;
  --amber: #ffad1f;
  --green: #3dff72;
  --ceramic: #ffe640;
  --blue: #5fb4ff;
  --mag: #ff47d7;
  --display: "Archivo", "Noto Sans SC", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --zh: "Noto Sans SC", "Archivo", system-ui, sans-serif;
  --gut: clamp(16px, 4vw, 56px);
  --max: 1320px;
  color-scheme: light;
}
/* screens, HMI panels and dark bands */
.dark {
  --bg: #07090c; --bg2: #0c1015; --panel: #0f141a; --line: #1b232c; --line2: #273240;
  --text: #e9eef3; --muted: #8794a3; --dim: #56626f; --ink: #ffad1f; --green-ink: #3dff72;
  color-scheme: dark; color: var(--text);
}
.band.dark { background: var(--bg); position: relative; }
.band.dark::before { content: ""; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(700px 400px at 20% 0%, rgba(255,173,31,.08), transparent 70%), repeating-linear-gradient(90deg, transparent 0 119px, rgba(255,255,255,.025) 119px 120px); }
.band.dark .sec { position: relative; padding-bottom: 110px; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.6 var(--display);
  font-variation-settings: "wdth" 100;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
html[data-lang="zh"] body { font-family: var(--zh); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
code { font-family: var(--mono); font-size: .9em; }
::selection { background: var(--amber); color: #000; }

/* bilingual */
html[data-lang="en"] .zh, html[data-lang="zh"] .en { display: none !important; }

/* film grain + grid backdrop */
.grain {
  position: fixed; inset: 0; z-index: 100; pointer-events: none; opacity: .03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 1.2s steps(6) infinite;
}
@keyframes grain { 0%{background-position:0 0} 33%{background-position:-47px 31px} 66%{background-position:38px -53px} 100%{background-position:0 0} }
main { overflow-x: clip; background-image: repeating-linear-gradient(90deg, transparent 0 119px, rgba(0,0,0,.035) 119px 120px); }

/* ───────── nav ───────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; gap: 28px;
  padding: 14px var(--gut);
  transition: background .3s, border-color .3s, padding .3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: rgba(243,244,242,.86); backdrop-filter: blur(14px) saturate(1.4); border-color: var(--line); padding-block: 10px; }
.brand { display: flex; align-items: center; gap: 10px; font: 500 14px/1 var(--mono); letter-spacing: .14em; }
.brand b { font-weight: 600; color: var(--ink); margin-left: 2px; }
.links { display: flex; gap: 22px; margin-left: auto; font-size: 14px; color: var(--muted); }
.links a { position: relative; transition: color .2s; }
.links a:hover { color: var(--text); }
.links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -4px; height: 1px; background: var(--amber); transition: right .25s; }
.links a:hover::after { right: 0; }
.nav-r { display: flex; align-items: center; gap: 12px; }
.lang { font: 500 12px/1 var(--mono); padding: 8px 10px; border: 1px solid var(--line2); border-radius: 6px; color: var(--muted); transition: .2s; }
.lang:hover { color: var(--text); border-color: var(--muted); }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 8px;
  background: var(--amber); color: #120b00;
  font-weight: 650; font-size: 15px; letter-spacing: .01em;
  position: relative; overflow: hidden; isolation: isolate;
  transition: transform .2s, box-shadow .3s;
  box-shadow: 0 0 0 0 rgba(255,173,31,.0);
}
.btn::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.55) 50%, transparent 70%); transform: translateX(-120%); transition: transform .6s; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 40px -10px rgba(255,173,31,.6); }
.btn:hover::before { transform: translateX(120%); }
.btn i { font-style: normal; transition: transform .2s; }
.btn:hover i { transform: translateX(4px); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--line2); }
.btn-ghost:hover { border-color: var(--muted); box-shadow: none; }
.btn-sm { padding: 9px 14px; font-size: 13px; }

/* ───────── hero ───────── */
.hero { position: relative; padding: 130px var(--gut) 0; max-width: calc(var(--max) + 2 * var(--gut)); margin: 0 auto; }
.hero::before {
  content: ""; position: absolute; inset: 0 -30vw auto; height: 900px; z-index: -1; pointer-events: none;
  background: radial-gradient(600px 380px at 75% 30%, rgba(255,173,31,.12), transparent 70%),
              radial-gradient(500px 300px at 15% 10%, rgba(61,255,114,.06), transparent 70%);
}
.hero-copy { max-width: 860px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 22px; font: 500 12.5px/1.2 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
html[data-lang="zh"] .eyebrow { letter-spacing: .2em; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 12px var(--green); animation: pulse 2s infinite; }
@keyframes pulse { 50% { opacity: .35; } }
h1 {
  margin: 0; font-weight: 800; line-height: .92; letter-spacing: -.035em;
  font-size: clamp(52px, 9.2vw, 132px);
  font-variation-settings: "wdth" 72;
}
html[data-lang="zh"] h1 { letter-spacing: -.01em; line-height: 1.05; font-weight: 900; font-size: clamp(46px, 8vw, 112px); }
h1 em { font-style: normal; color: transparent; -webkit-text-stroke: 1.5px #d98500; background: linear-gradient(90deg, #c46f00, #f5a11a); -webkit-background-clip: text; background-clip: text; background-size: 0% 100%; background-repeat: no-repeat; animation: fill 2.4s 1s cubic-bezier(.6,0,.2,1) forwards; }
@keyframes fill { to { background-size: 100% 100%; } }
.lede { max-width: 640px; margin: 28px 0 0; font-size: clamp(16px, 1.5vw, 19px); color: var(--muted); line-height: 1.65; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.stage {
  position: relative; margin-top: 64px; border: 1px solid var(--line2); border-radius: 14px; overflow: hidden;
  background: #000; aspect-ratio: 1400 / 700;
  box-shadow: 0 40px 90px -36px rgba(16,24,32,.45);
}
.stage-imgs { position: absolute; inset: 0; --x: 0%; }
.layer { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 30%; }
.l-sobel { clip-path: inset(0 calc(100% - var(--x)) 0 0); }
.l-annot { opacity: 0; transition: opacity .9s; }
.stage.annot .l-annot { opacity: 1; }
.stage.annot .l-sobel { opacity: 0; transition: opacity .9s; }
.beam {
  position: absolute; top: 0; bottom: 0; left: var(--x); width: 2px; margin-left: -1px;
  background: var(--amber); box-shadow: 0 0 18px 3px rgba(255,173,31,.85), 0 0 80px 20px rgba(255,173,31,.25);
}
.beam::before { content: ""; position: absolute; top: 0; bottom: 0; right: 2px; width: 140px; background: linear-gradient(90deg, transparent, rgba(255,173,31,.14)); }
.stage.annot .beam { opacity: 0; transition: opacity .4s; }
.edge-tag {
  position: absolute; top: 58%; padding: 8px 12px; border-radius: 6px;
  font: 500 15px/1 var(--mono); color: #fff; background: rgba(6,8,11,.82); border: 1px solid var(--line2);
  backdrop-filter: blur(6px); opacity: 0; transform: translateY(10px); transition: .5s cubic-bezier(.2,.8,.2,1);
  white-space: nowrap;
}
.edge-tag b { display: block; font-size: 10px; letter-spacing: .14em; color: var(--muted); margin-bottom: 6px; font-weight: 500; }
.edge-tag small { font-size: 11px; color: var(--muted); margin-left: 3px; }
.edge-tag.t1 { left: 28%; border-color: rgba(255,230,64,.5); }
.edge-tag.t1::after { content: ""; position: absolute; left: 100%; top: 50%; width: calc(15.8vw * .7); max-width: 130px; height: 1px; background: var(--ceramic); }
.edge-tag.t2 { left: 56%; top: 20%; border-color: rgba(255,173,31,.5); }
.stage.annot .edge-tag { opacity: 1; transform: none; }
.stage.annot .edge-tag.t2 { transition-delay: .25s; }
.hud { position: absolute; z-index: 2; font: 500 11.5px/1 var(--mono); color: rgba(233,238,243,.85); letter-spacing: .06em; padding: 7px 9px; background: rgba(0,0,0,.45); border-radius: 4px; backdrop-filter: blur(4px); }
.hud span { color: var(--amber); }
.hud b { color: var(--green); font-weight: 500; }
.tl { top: 16px; left: 16px; } .tr { top: 16px; right: 16px; } .bl { bottom: 16px; left: 16px; } .br { bottom: 16px; right: 16px; color: var(--green); }
.corner { position: absolute; width: 18px; height: 18px; border: 2px solid var(--amber); z-index: 2; opacity: .8; }
.c1 { top: 8px; left: 8px; border-right: 0; border-bottom: 0; } .c2 { top: 8px; right: 8px; border-left: 0; border-bottom: 0; }
.c3 { bottom: 8px; left: 8px; border-right: 0; border-top: 0; } .c4 { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }

.ticker { margin: 28px calc(-1 * var(--gut)) 0; overflow: hidden; border-block: 1px solid var(--line); mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent); }
.ticker-track { display: flex; gap: 48px; width: max-content; padding: 14px 0; font: 500 13px/1 var(--mono); color: var(--muted); animation: tick 60s linear infinite; }
.ticker-track span b { color: var(--text); font-weight: 500; }
.ticker-track span i { font-style: normal; margin-right: 8px; }
@keyframes tick { to { transform: translateX(-50%); } }

/* ───────── stats ───────── */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); max-width: var(--max); margin: 0 auto; padding: 90px var(--gut) 40px; gap: 0; }
.stat { padding: 8px 28px; border-left: 1px solid var(--line); }
.stat:first-child { border-left: 0; padding-left: 0; }
.stat b { font: 700 clamp(44px, 5vw, 72px)/1 var(--display); font-variation-settings: "wdth" 70; letter-spacing: -.03em; }
.stat small { font: 500 14px var(--mono); color: var(--ink); margin-left: 6px; }
.stat p { margin: 10px 0 0; color: var(--muted); font-size: 14px; line-height: 1.45; }

/* ───────── sections ───────── */
.sec { max-width: calc(var(--max) + 2 * var(--gut)); margin: 0 auto; padding: 120px var(--gut) 40px; }
.sec-h { display: grid; grid-template-columns: 90px 1fr; column-gap: 24px; margin-bottom: 56px; }
.idx { grid-row: span 2; margin: 10px 0 0; font: 500 13px/1 var(--mono); color: var(--ink); }
.idx::before { content: "§ "; color: var(--dim); }
h2 { margin: 0; font-weight: 750; font-size: clamp(36px, 5.2vw, 72px); line-height: 1; letter-spacing: -.03em; font-variation-settings: "wdth" 78; }
html[data-lang="zh"] h2 { letter-spacing: 0; font-weight: 900; line-height: 1.15; }
.sub { margin: 20px 0 0; max-width: 700px; color: var(--muted); font-size: 17px; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s cubic-bezier(.2,.8,.2,1), transform .9s cubic-bezier(.2,.8,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* machine */
.machine { display: grid; gap: 16px; }
.machine figure { margin: 0; position: relative; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); background: var(--panel); }
.machine img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s cubic-bezier(.2,.8,.2,1); }
.machine figure:hover img { transform: scale(1.03); }
.machine figcaption { color: #fff; position: absolute; left: 14px; bottom: 12px; font: 500 11px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; padding: 6px 8px; background: rgba(0,0,0,.6); border-radius: 4px; }
.machine-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.machine-row figure { aspect-ratio: 3 / 2; }
.machine-main { aspect-ratio: 3 / 2; }
.machine-main:hover img { transform: none; }
.pin { position: absolute; left: var(--x); top: var(--y); z-index: 3; width: 28px; height: 28px; margin: -14px 0 0 -14px; }
.pin i { position: absolute; inset: 8px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 4px rgba(255,173,31,.25); }
.pin i::after { content: ""; position: absolute; inset: -10px; border-radius: 50%; border: 1px solid var(--amber); animation: ring 2.2s infinite; }
@keyframes ring { from { transform: scale(.4); opacity: 1; } to { transform: scale(1.6); opacity: 0; } }
.pin > span {
  color: #e9eef3; position: absolute; left: 50%; bottom: calc(100% + 10px); width: 230px; transform: translate(-50%, 6px);
  padding: 12px 14px; border-radius: 8px; background: rgba(9,12,16,.94); border: 1px solid var(--line2);
  text-align: left; opacity: 0; pointer-events: none; transition: .25s;
}
.pin > span b { display: block; font-size: 14px; margin-bottom: 4px; }
.pin > span em { font-style: normal; font-size: 12.5px; color: #9aa5b1; line-height: 1.4; display: block; }
.pin:hover > span, .pin:focus-visible > span, .pin.open > span { opacity: 1; transform: translate(-50%, 0); }
.pin:focus-visible { outline: none; }

/* pipeline */
.pipe { display: grid; grid-template-columns: 1.35fr 1fr; gap: 48px; align-items: start; }
.pipe-stage { position: sticky; top: 90px; }
.pipe-frame { position: relative; aspect-ratio: 1400/933; border-radius: 12px; overflow: hidden; border: 1px solid var(--line2); background: #000; }
.pl { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; transform: scale(1.02); transition: opacity .7s, transform 1.2s cubic-bezier(.2,.8,.2,1); }
.pl.on { opacity: 1; transform: none; }
canvas.pl { background: #040507; }
.pipe-label { position: absolute; left: 14px; top: 14px; font: 500 12px/1 var(--mono); letter-spacing: .1em; padding: 7px 9px; background: rgba(0,0,0,.6); border-radius: 4px; color: var(--amber); }
.pipe-bar { height: 2px; background: var(--line); margin-top: 14px; border-radius: 2px; overflow: hidden; }
.pipe-bar i { display: block; height: 100%; width: 25%; background: var(--amber); transition: width .6s cubic-bezier(.2,.8,.2,1); }
.pipe-steps { list-style: none; margin: 0; padding: 0; }
.ps { min-height: min(62vh, 620px); padding: 28px 0 28px 28px; border-left: 1px solid var(--line); position: relative; opacity: .35; transition: opacity .5s; }
.ps:last-child { min-height: min(40vh, 420px); }
.ps::before { content: ""; position: absolute; left: -1px; top: 28px; width: 2px; height: 0; background: var(--amber); transition: height .6s; }
.ps.on { opacity: 1; }
.ps.on::before { height: 64px; }
.ps .n { font: 500 13px var(--mono); color: var(--ink); }
.ps h3 { margin: 8px 0 12px; font-size: 30px; font-weight: 700; letter-spacing: -.02em; font-variation-settings: "wdth" 85; }
.ps p { margin: 0; color: var(--muted); font-size: 16.5px; max-width: 440px; }

/* electrode diagram */
.elec { position: relative; padding: 36px 32px 28px; border: 1px solid var(--line); border-radius: 14px; background:
  linear-gradient(180deg, rgba(255,255,255,.015), transparent), var(--bg2); }
.elec-total { font: 500 13px var(--mono); color: var(--muted); margin-bottom: 18px; }
.elec-total b { color: var(--text); font-size: 22px; margin: 0 4px; font-weight: 600; }
#elecSvg { width: 100%; height: 300px; overflow: visible; }
#elecSvg text { font-family: var(--mono); }
.seg { cursor: crosshair; transition: opacity .2s; }
.elec.hovering .seg { opacity: .35; }
.elec.hovering .seg.hl { opacity: 1; }
.elec-tip { position: absolute; pointer-events: none; padding: 9px 12px; border-radius: 6px; background: rgba(9,12,16,.95); border: 1px solid var(--line2); font: 500 13px/1.3 var(--mono); opacity: 0; transition: opacity .15s; white-space: nowrap; z-index: 4; }
.elec-tip b { color: var(--amber); font-size: 18px; display: block; }
.legend { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 16px; font-size: 13px; color: var(--muted); }
.legend > span { display: inline-flex; align-items: center; gap: 8px; }
.legend i { width: 14px; height: 10px; border-radius: 2px; background: var(--c); border: 1px solid var(--b, transparent); }

.mgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 32px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.mcard { background: var(--bg); padding: 28px 26px; position: relative; --mx: 50%; --my: 50%; }
.mcard::before { content: ""; position: absolute; inset: 0; background: radial-gradient(260px circle at var(--mx) var(--my), rgba(255,173,31,.09), transparent 70%); opacity: 0; transition: opacity .3s; }
.mcard:hover::before { opacity: 1; }
.mcard h3 { margin: 0 0 8px; font-size: 20px; font-weight: 650; }
.mcard p { margin: 0 0 18px; color: var(--muted); font-size: 15px; }
.mcard code { color: var(--ink); font-size: 12.5px; }

/* software window */
.win { border: 1px solid var(--line2); border-radius: 12px; overflow: hidden; background: #e9ecf1; box-shadow: 0 40px 90px -40px rgba(16,24,32,.4); }
.win-bar { display: flex; align-items: center; gap: 8px; padding: 10px 14px; background: #10151b; border-bottom: 1px solid var(--line); overflow-x: auto; scrollbar-width: none; }
.win-bar > i { width: 11px; height: 11px; border-radius: 50%; background: #2a333e; flex: none; }
.win-tabs { display: flex; gap: 4px; margin-left: 14px; }
.win-tabs button { flex: none; font-size: 13px; color: var(--muted); padding: 7px 12px; border-radius: 6px; transition: .2s; white-space: nowrap; }
.win-tabs button:hover { color: var(--text); background: rgba(255,255,255,.04); }
.win-tabs button.on { color: #120b00; background: var(--amber); }
.win-body { position: relative; aspect-ratio: 1920/991; }
.shot { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top; opacity: 0; transition: opacity .5s; }
.shot.on { opacity: 1; }

.closeups { display: grid; grid-template-columns: 1fr 1.2fr; gap: 16px; margin-top: 16px; }
.closeups figure { margin: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--panel); display: flex; flex-direction: column; }
.closeups img { flex: 1; object-fit: cover; width: 100%; min-height: 0; }
.closeups figure:last-child img { object-fit: contain; background: #dfe3ea; padding: 12px; }
.closeups figcaption { padding: 14px 16px; font-size: 14px; color: var(--muted); border-top: 1px solid var(--line); }

/* calibration */
.cal-wrap { display: grid; grid-template-columns: 1fr 1fr 1.1fr; gap: 16px; }
.cal { border: 1px solid var(--line); border-radius: 12px; padding: 24px; background: var(--bg2); }
.cal h4 { margin: 0 0 20px; font: 600 13px var(--mono); letter-spacing: .1em; display: flex; justify-content: space-between; }
.cal h4 small { color: var(--ink); font-weight: 500; }
.cells { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.cell { aspect-ratio: 1; position: relative; border: 1px solid var(--line2); border-radius: 4px; display: grid; place-items: center; font: 500 10.5px/1.35 var(--mono); text-align: center; color: var(--muted); overflow: hidden; }
.cell::before { content: ""; position: absolute; inset: 0; background: repeating-conic-gradient(rgba(0,0,0,.045) 0 25%, transparent 0 50%) 0 0 / 50% 50%; }
.cell span { position: relative; }
.cell span b { color: var(--text); font-weight: 500; }
.cell .bar { position: absolute; left: 0; bottom: 0; height: 3px; background: var(--green-ink); width: var(--w); transition: width 1.2s cubic-bezier(.2,.8,.2,1); }
.cal-max { margin: 18px 0 0; font: 500 13px var(--mono); color: var(--muted); display: flex; align-items: center; gap: 10px; }
.cal-max b { color: var(--text); font-weight: 600; }
.ok { font-style: normal; color: #04150a; background: var(--green); padding: 3px 7px; border-radius: 4px; font-size: 11px; font-weight: 600; margin-left: auto; }
.cal-notes { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.cal-notes li { padding: 16px 20px; border-top: 1px solid var(--line); display: grid; gap: 4px; font-size: 14px; color: var(--muted); }
.cal-notes li:first-child { border-top: 0; }
.cal-notes b { font: 600 13px var(--mono); color: var(--ink); }

/* terminal */
.term { border: 1px solid var(--line2); border-radius: 12px; overflow: hidden; background: #05070a; box-shadow: 0 40px 90px -40px rgba(16,24,32,.45); }
.term-bar { display: flex; align-items: center; gap: 8px; padding: 11px 14px; border-bottom: 1px solid var(--line); background: #0b0f14; font: 500 12px var(--mono); color: var(--muted); }
.term-bar i { width: 11px; height: 11px; border-radius: 50%; background: #2a333e; }
.term-bar span { margin-left: 10px; }
.live { margin-left: auto; color: var(--green); font-weight: 500; animation: pulse 1.6s infinite; }
#termBody { margin: 0; padding: 22px 24px; height: 520px; overflow: hidden; font: 400 13.5px/1.6 var(--mono); color: #c9d3dd; white-space: pre-wrap; word-break: break-all; }
#termBody .tx { color: var(--amber); }
#termBody .rx { color: var(--green); }
#termBody .c { color: var(--dim); }
#termBody .k { color: var(--blue); }
#termBody .num { color: #f2f5f8; }
.caret { display: inline-block; width: 8px; height: 1.1em; vertical-align: -2px; background: var(--amber); animation: pulse 1s steps(1) infinite; }
.integ { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 16px; }
.integ > div { border: 1px solid var(--line); border-radius: 10px; padding: 18px; display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
.integ b { font: 600 15px var(--mono); color: var(--text); }

/* products */
.prods { display: grid; grid-template-columns: repeat(3, 1fr) 1fr; gap: 16px; }
.prod { margin: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--panel); }
.prod img { aspect-ratio: 4/5; object-fit: cover; width: 100%; filter: grayscale(.2); transition: transform 1s cubic-bezier(.2,.8,.2,1), filter .4s; }
.prod:hover img { transform: scale(1.06); filter: none; }
.prod figcaption { padding: 14px 16px; font-size: 13.5px; color: var(--muted); display: grid; gap: 4px; }
.prod figcaption b { color: var(--text); font-size: 15px; font-weight: 600; }
.prod-list { border: 1px solid var(--line); border-radius: 12px; padding: 22px; background: var(--bg2); }
.prod-list p { margin: 0 0 14px; font: 500 12px var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--ink); }
.prod-list ul { list-style: none; margin: 0; padding: 0; }
.prod-list li { padding: 10px 0; border-top: 1px solid var(--line); font-size: 14.5px; display: flex; gap: 10px; }
.prod-list li::before { content: "✓"; color: var(--green-ink); font-family: var(--mono); }

/* specs */
.specs { margin: 0; border-top: 1px solid var(--line2); }
.specs > div { display: grid; grid-template-columns: 260px 1fr; gap: 24px; padding: 20px 0; border-bottom: 1px solid var(--line); transition: background .2s; }
.specs > div:hover { background: linear-gradient(90deg, rgba(255,173,31,.1), transparent 60%); }
.specs dt { font: 500 13px/1.6 var(--mono); color: var(--muted); letter-spacing: .06em; text-transform: uppercase; }
.specs dd { margin: 0; font-size: 17px; }
.principle { margin: 48px 0 0; padding: 28px 32px; border-left: 3px solid var(--amber); background: linear-gradient(90deg, rgba(255,173,31,.14), transparent); font-size: clamp(18px, 2vw, 24px); line-height: 1.45; color: var(--muted); }
.principle b { color: var(--text); font-weight: 600; }

/* contact */
.contact { position: relative; margin-top: 120px; background: var(--bg); min-height: 620px; display: grid; align-items: center; overflow: hidden; border-top: 1px solid var(--line); }
.contact-bg { position: absolute; inset: 0; }
.contact-bg img { width: 100%; height: 100%; object-fit: cover; object-position: 70% 50%; filter: saturate(.8) brightness(.85); }
.contact-bg::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7,9,12,.96) 18%, rgba(7,9,12,.55) 55%, rgba(7,9,12,.15)), linear-gradient(0deg, rgba(7,9,12,.9), transparent 35%); }
.contact-in { position: relative; max-width: calc(var(--max) + 2 * var(--gut)); width: 100%; margin: 0 auto; padding: 100px var(--gut); }
.contact h2 { font-size: clamp(44px, 7vw, 104px); }
.contact p { max-width: 520px; color: var(--muted); font-size: 18px; margin: 24px 0 0; }
.foot { display: flex; flex-wrap: wrap; gap: 12px 32px; justify-content: space-between; padding: 28px var(--gut); border-top: 1px solid var(--line); font: 500 12px var(--mono); color: var(--dim); }
.foot a:hover { color: var(--ink); }

/* ───────── responsive ───────── */
@media (max-width: 1080px) {
  .links { display: none; }
  .nav-r { margin-left: auto; }
  .pipe { grid-template-columns: 1fr; }
  .pipe-stage { top: 64px; z-index: 2; background: var(--bg); padding-bottom: 8px; }
  .ps { min-height: 46vh; }
  .cal-wrap { grid-template-columns: 1fr 1fr; }
  .cal-notes { grid-column: span 2; }
  .prods { grid-template-columns: 1fr 1fr; }
  .integ { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav { gap: 12px; }
  .nav .btn-sm { display: none; }
  .hero { padding-top: 104px; }
  .stage { aspect-ratio: 4/3; margin-top: 44px; }
  .layer { object-position: 46% 30%; }
  .edge-tag { font-size: 12px; padding: 6px 8px; }
  .edge-tag.t1 { left: 4%; } .edge-tag.t1::after { display: none; }
  .edge-tag.t2 { left: 48%; }
  .hud { font-size: 9.5px; }
  .tr { display: none; }
  .stats { grid-template-columns: 1fr 1fr; gap: 28px 0; padding-top: 60px; }
  .stat:nth-child(3) { border-left: 0; padding-left: 0; }
  .sec { padding-top: 88px; }
  .sec-h { grid-template-columns: 1fr; }
  .idx { grid-row: auto; margin-bottom: 14px; }
  .machine-row { grid-template-columns: 1fr 1fr; }
  .machine-row figure:last-child { display: none; }
  .pin > span { width: 190px; }
  .elec { padding: 22px 14px; }
  #elecSvg { height: 220px; }
  .mgrid { grid-template-columns: 1fr; }
  .closeups { grid-template-columns: 1fr; }
  .cal-wrap { grid-template-columns: 1fr; }
  .cal-notes { grid-column: auto; }
  #termBody { height: 460px; font-size: 11.5px; padding: 16px; }
  .integ { grid-template-columns: 1fr; }
  .prods { grid-template-columns: 1fr; }
  .prod img { aspect-ratio: 16/10; }
  .specs > div { grid-template-columns: 1fr; gap: 6px; }
  .win-body { aspect-ratio: 1920/1100; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001s !important; animation-iteration-count: 1 !important; transition-duration: .001s !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* wide screens: copy left, live scanner right */
@media (min-width: 1180px) {
  .hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); column-gap: 56px; align-items: center; padding-top: 120px; }
  .hero-copy { align-self: center; }
  .hero h1 { font-size: clamp(64px, 6.6vw, 108px); }
  html[data-lang="zh"] .hero h1 { font-size: clamp(56px, 5.8vw, 96px); }
  .stage { margin-top: 0; aspect-ratio: 1 / 0.86; }
  .layer { object-position: 42% 30%; }
  .edge-tag.t1 { left: 10%; }
  .edge-tag.t1::after { width: 120px; }
  .edge-tag.t2 { left: 60%; top: 36%; }
  .ticker { grid-column: 1 / -1; margin-top: 56px; }
}

/* refinements */
.stage.annot .tr { opacity: 0; transition: opacity .4s; }
.cal { display: flex; flex-direction: column; }
.cal-cap { margin: 0 0 10px; font: 500 11px var(--mono); color: var(--dim); letter-spacing: .06em; }
.cal-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 20px 0 0; background: var(--line); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.cal-stats > div { background: var(--bg); padding: 12px 14px; }
.cal-stats dt { font: 500 11px var(--mono); color: var(--dim); text-transform: uppercase; letter-spacing: .08em; }
.cal-stats dd { margin: 4px 0 0; font: 600 17px var(--mono); }
.cal-max { margin-top: auto !important; padding-top: 18px; }
.prods { grid-template-columns: repeat(3, 1fr); }
.prod img { aspect-ratio: 4/3; }
.prod-list { grid-column: 1 / -1; display: grid; grid-template-columns: 180px 1fr; align-items: center; }
.prod-list p { margin: 0; }
.prod-list ul { display: grid; grid-template-columns: repeat(3, 1fr); column-gap: 24px; }
@media (max-width: 1080px) { .prods { grid-template-columns: 1fr 1fr; } .prod-list ul { grid-template-columns: 1fr 1fr; } }
@media (max-width: 760px) { .prods { grid-template-columns: 1fr; } .prod-list { grid-template-columns: 1fr; } .prod-list p { margin-bottom: 12px; } .prod-list ul { grid-template-columns: 1fr; } }

/* top/bottom misalignment demo */
.misal { display: grid; grid-template-columns: 1fr 1.25fr; gap: 40px; align-items: center; margin-top: 16px; padding: 36px; border-radius: 14px; background: var(--bg2); border: 1px solid var(--line); }
.misal .tag { margin: 0 0 14px; font: 500 11.5px var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink); }
.misal h3 { margin: 0 0 14px; font-size: clamp(24px, 2.4vw, 32px); line-height: 1.15; letter-spacing: -.02em; font-variation-settings: "wdth" 85; }
.misal-copy > p:not(.tag) { margin: 0 0 26px; color: var(--muted); font-size: 15.5px; }
.misal-copy b { color: var(--text); font-weight: 600; }
.sl { display: grid; gap: 10px; margin-top: 18px; font-size: 13.5px; color: var(--muted); }
.sl > span { display: flex; justify-content: space-between; gap: 12px; }
.sl b { font: 600 13px var(--mono); color: var(--text); }
.sl input { width: 100%; accent-color: var(--amber); height: 22px; cursor: ew-resize; }
.misal-view { min-width: 0; }
#misalSvg { width: 100%; height: auto; display: block; border: 1px solid var(--line); border-radius: 10px; background: #05070a; }
#misalSvg text { font-family: var(--mono); }
.misal-read { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.misal-read > div { border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; display: grid; gap: 4px; }
.misal-read small { font: 500 11px var(--mono); color: var(--dim); text-transform: uppercase; letter-spacing: .06em; }
.misal-read b { font: 600 22px var(--mono); }
.misal-read b.mag { color: var(--mag); }
.misal-read em { font-style: normal; font-size: 12.5px; }
.chg { color: var(--amber); }
.ok2 { color: var(--green-ink); }
@media (max-width: 1080px) { .misal { grid-template-columns: 1fr; } }
@media (max-width: 760px) { .misal { padding: 20px 16px; } .misal-read { grid-template-columns: 1fr; } }

/* /pay */
.pay { padding-top: 140px; max-width: 980px; }
.pay-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.pay-steps li { background: var(--bg2); padding: 24px 26px; display: grid; grid-template-columns: 56px 1fr; column-gap: 12px; }
.pay-steps .n { grid-row: span 2; font: 500 13px var(--mono); color: var(--ink); padding-top: 4px; }
.pay-steps h3 { margin: 0 0 6px; font-size: 20px; font-weight: 650; }
.pay-steps p { margin: 0; color: var(--muted); font-size: 15.5px; }
.pay-cta { margin-top: 32px; }
.pay-note { margin: 18px 0 0; font: 500 12.5px var(--mono); color: var(--dim); }
@media (max-width: 760px) { .pay { padding-top: 104px; } .pay-steps li { grid-template-columns: 1fr; } .pay-steps .n { grid-row: auto; margin-bottom: 6px; } }

/* /privacy /terms */
.legal { padding-top: 140px; max-width: 860px; }
.legal h3 { margin: 34px 0 10px; font-size: 19px; font-weight: 650; letter-spacing: -.01em; }
.legal p { margin: 0 0 12px; color: var(--muted); font-size: 16px; line-height: 1.7; }
.legal a { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 760px) { .legal { padding-top: 104px; } }