:root {
  --bg: #071019;
  --surface: #0c1824;
  --surface-2: #102131;
  --line: rgba(255,255,255,.12);
  --text: #f3f7fb;
  --muted: #9fb0c0;
  --accent: #39a9ff;
  --accent-2: #82ccff;
  --ok: #52d6a0;
  --warning: #f2c45c;
  --max: 1180px;
  --radius: 22px;
  --shadow: 0 28px 80px rgba(0,0,0,.35);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 80% 0%, rgba(57,169,255,.14), transparent 30%),
    linear-gradient(180deg, #06101a 0%, #09131d 100%);
  color: var(--text);
  font-family: Inter, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img, svg { max-width: 100%; }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(6,16,26,.78);
  border-bottom: 1px solid var(--line);
}
.nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display:flex; align-items:center; gap:12px; font-weight: 800; letter-spacing:.04em; }
.brand svg { width: 38px; height: 38px; }
.brand small { display:block; font-size:10px; color:var(--muted); letter-spacing:.16em; font-weight:600; }
.nav-links { display:flex; align-items:center; gap:24px; font-size:14px; color:#d9e3ec; }
.nav-links a:hover { color: var(--accent-2); }
.menu-toggle { display:none; background:none; border:1px solid var(--line); color:white; border-radius:12px; padding:9px 12px; }
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  border-radius:999px; padding:12px 20px; font-weight:750; font-size:14px;
  border:1px solid transparent; transition:.2s ease; cursor:pointer;
}
.btn-primary { background:var(--accent); color:#03111d; box-shadow:0 12px 30px rgba(57,169,255,.26); }
.btn-primary:hover { transform:translateY(-2px); background:#67bbff; }
.btn-secondary { border-color:var(--line); background:rgba(255,255,255,.04); }
.btn-secondary:hover { border-color:rgba(130,204,255,.55); color:var(--accent-2); }
.hero { padding:88px 0 64px; overflow:hidden; }
.hero-grid { display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; }
.eyebrow { color:var(--accent-2); text-transform:uppercase; letter-spacing:.18em; font-size:12px; font-weight:800; }
h1 { font-size:clamp(42px,6vw,76px); line-height:1.06; letter-spacing:-.045em; margin:18px 0 24px; }
h2 { font-size:clamp(30px,4vw,48px); line-height:1.18; letter-spacing:-.035em; margin:0 0 18px; }
h3 { font-size:21px; line-height:1.35; margin:0 0 10px; }
.lead { color:#c6d3df; font-size:18px; max-width:720px; }
.hero-actions { display:flex; flex-wrap:wrap; gap:12px; margin-top:32px; }
.hero-note { margin-top:18px; font-size:13px; color:var(--muted); }
.mission-visual { position:relative; min-height:500px; display:grid; place-items:center; }
.case-shell {
  width:min(520px,100%); aspect-ratio:1.12; border:1px solid rgba(130,204,255,.26); border-radius:38px;
  background:linear-gradient(145deg, rgba(255,255,255,.08), rgba(255,255,255,.015));
  box-shadow:var(--shadow), inset 0 0 0 10px rgba(255,255,255,.02);
  padding:34px; position:relative; transform:rotate(-3deg);
}
.case-shell:before,.case-shell:after { content:""; position:absolute; background:#0b1a28; border:1px solid var(--line); }
.case-shell:before { width:100px;height:24px;border-radius:8px;left:50%;top:-15px;transform:translateX(-50%); }
.case-shell:after { width:28px;height:130px;border-radius:10px;right:-16px;top:50%;transform:translateY(-50%); }
.foam-grid { height:100%; display:grid; grid-template-columns:1.2fr .8fr; grid-template-rows:1fr 1fr; gap:14px; }
.cutout { border:1px solid rgba(130,204,255,.18); background:#07121c; border-radius:18px; position:relative; overflow:hidden; }
.cutout.large { grid-row:1/3; }
.drone-mark { position:absolute; inset:16%; border:2px solid rgba(130,204,255,.34); border-radius:48% 52% 42% 58%; }
.drone-mark:before,.drone-mark:after { content:""; position:absolute; width:145%; height:2px; background:rgba(130,204,255,.32); left:-22%; top:50%; }
.drone-mark:before { transform:rotate(38deg); }
.drone-mark:after { transform:rotate(-38deg); }
.stat-strip { display:grid; grid-template-columns:repeat(4,1fr); border:1px solid var(--line); border-radius:18px; overflow:hidden; margin-top:54px; }
.stat { padding:22px; background:rgba(255,255,255,.025); border-right:1px solid var(--line); }
.stat:last-child { border-right:0; }
.stat strong { display:block; font-size:22px; }
.stat span { color:var(--muted); font-size:13px; }
.section { padding:92px 0; }
.section.alt { background:rgba(255,255,255,.022); border-block:1px solid var(--line); }
.section-head { display:flex; justify-content:space-between; gap:40px; align-items:end; margin-bottom:36px; }
.section-head p { max-width:650px; color:var(--muted); margin:0; }
.grid-3 { display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.grid-2 { display:grid; grid-template-columns:repeat(2,1fr); gap:20px; }
.card {
  padding:28px; border:1px solid var(--line); border-radius:var(--radius);
  background:linear-gradient(155deg, rgba(255,255,255,.055), rgba(255,255,255,.018));
  min-height:100%; transition:.2s ease;
}
.card:hover { transform:translateY(-4px); border-color:rgba(57,169,255,.42); }
.card-number { font-size:12px; letter-spacing:.14em; color:var(--accent-2); font-weight:800; }
.card p { color:var(--muted); margin:0; }
.card ul { padding-left:18px; color:#c4d0db; }
.icon-box { width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:rgba(57,169,255,.12);border:1px solid rgba(57,169,255,.25);margin-bottom:24px; }
.tag-row { display:flex; flex-wrap:wrap; gap:8px; margin-top:20px; }
.tag { font-size:12px; color:#d3e7f6; padding:6px 10px; border:1px solid var(--line); border-radius:999px; background:rgba(255,255,255,.025); }
.process { counter-reset:step; }
.process-step { display:grid; grid-template-columns:64px 1fr; gap:18px; padding:24px 0; border-bottom:1px solid var(--line); }
.process-step:before { counter-increment:step; content:counter(step, decimal-leading-zero); width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:rgba(57,169,255,.12);color:var(--accent-2);font-weight:800; }
.process-step p { margin:5px 0 0; color:var(--muted); }
.callout { border:1px solid rgba(82,214,160,.28); background:rgba(82,214,160,.06); border-radius:var(--radius); padding:30px; }
.callout.warning { border-color:rgba(242,196,92,.3); background:rgba(242,196,92,.06); }
.quote-band { padding:64px; border-radius:30px; background:linear-gradient(130deg,#0e2d45,#0a1825 65%); border:1px solid rgba(130,204,255,.2); position:relative; overflow:hidden; }
.quote-band:after { content:"";position:absolute;width:380px;height:380px;border-radius:50%;background:rgba(57,169,255,.08);right:-120px;top:-180px; }
.page-hero { padding:72px 0 46px; border-bottom:1px solid var(--line); }
.page-hero h1 { font-size:clamp(38px,5vw,64px); }
.breadcrumb { font-size:13px; color:var(--muted); }
.content-grid { display:grid;grid-template-columns:1fr 320px;gap:50px;align-items:start; }
.sidebar { position:sticky;top:110px; }
.sidebar .card { min-height:auto; }
.table-wrap { overflow:auto; border:1px solid var(--line); border-radius:18px; }
table { width:100%; border-collapse:collapse; min-width:680px; }
th,td { text-align:left; padding:15px 18px; border-bottom:1px solid var(--line); }
th { color:var(--accent-2); font-size:13px; background:rgba(255,255,255,.035); }
td { color:#ced9e2; }
form { display:grid; gap:16px; }
.form-grid { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
label { display:grid; gap:8px; font-size:13px; color:#d7e1e9; font-weight:700; }
input,select,textarea {
  width:100%; border:1px solid var(--line); border-radius:13px; background:#081521; color:white; padding:13px 14px; font:inherit;
}
input:focus,select:focus,textarea:focus { outline:none; border-color:var(--accent); box-shadow:0 0 0 3px rgba(57,169,255,.12); }
textarea { min-height:150px; resize:vertical; }
.form-status { min-height:24px; color:var(--muted); font-size:14px; }
.honeypot { position:absolute; left:-10000px; width:1px; height:1px; overflow:hidden; }
.site-footer { padding:54px 0 30px; border-top:1px solid var(--line); background:#050d14; }
.footer-grid { display:grid; grid-template-columns:1.4fr repeat(3,1fr); gap:32px; }
.footer-grid h4 { margin:0 0 12px; }
.footer-grid a,.footer-grid p { color:var(--muted); font-size:13px; display:block; margin:8px 0; }
.footer-bottom { margin-top:36px; padding-top:22px; border-top:1px solid var(--line); color:#6f8293; font-size:12px; display:flex; justify-content:space-between; gap:20px; }
.article-list { display:grid; gap:14px; }
.article-item { padding:22px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.025); }
.article-item small { color:var(--accent-2); }
.kicker { display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border-radius:999px;background:rgba(57,169,255,.1);color:var(--accent-2);font-size:12px;font-weight:800;letter-spacing:.08em; }
.notice { color:#8fa2b3; font-size:12px; }
@media(max-width:900px){
  .nav-links{display:none;position:absolute;left:20px;right:20px;top:70px;flex-direction:column;align-items:stretch;background:#081521;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow)}
  .nav-links.open{display:flex}.menu-toggle{display:block}
  .hero-grid,.content-grid,.footer-grid{grid-template-columns:1fr}.mission-visual{min-height:400px}.sidebar{position:static}
  .grid-3{grid-template-columns:1fr 1fr}.stat-strip{grid-template-columns:1fr 1fr}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .section-head{display:block}.section-head p{margin-top:14px}.quote-band{padding:38px}
}
@media(max-width:620px){
  .container{width:min(100% - 28px,var(--max))}.hero{padding-top:58px}.grid-3,.grid-2,.form-grid{grid-template-columns:1fr}.stat-strip{grid-template-columns:1fr}.stat{border-right:0!important;border-bottom:1px solid var(--line)!important}.stat:last-child{border-bottom:0!important}.case-shell{padding:22px;border-radius:28px}.mission-visual{min-height:330px}.section{padding:66px 0}.nav{min-height:68px}.brand small{display:none}.footer-bottom{display:block}.hero-actions .btn{width:100%}
}

/* Phase 1 visual upgrade */
figure { margin: 0; }
.nav-links [aria-current="page"] { color: var(--accent-2); }
.visual-hero,
.product-hero,
.system-hero {
  position: relative;
  min-height: 760px;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
  border-bottom: 1px solid var(--line);
  background: #050c13;
}
.hero-media,
.product-hero-media,
.system-hero-media,
.final-cta picture {
  position: absolute;
  inset: 0;
  z-index: -3;
}
.hero-media img,
.product-hero-media img,
.system-hero-media img,
.final-cta picture img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: 70% center;
}
.hero-shade,
.product-hero-shade,
.system-hero-shade,
.final-cta-shade {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(4,11,17,.98) 0%, rgba(4,11,17,.9) 38%, rgba(4,11,17,.3) 70%, rgba(4,11,17,.16) 100%),
    linear-gradient(0deg, rgba(4,11,17,.88) 0%, transparent 44%);
}
.hero-copy,
.product-hero-copy,
.system-hero-copy {
  padding: 106px 0 154px;
}
.hero-copy > *,
.product-hero-copy > *,
.system-hero-copy > * { max-width: 720px; }
.hero-copy h1,
.product-hero-copy h1,
.system-hero-copy h1 { font-size: clamp(48px, 6.5vw, 88px); }
.hero-subtitle { font-size: clamp(17px, 2vw, 23px); font-weight: 800; color: #fff; max-width: 780px; }
.capability-rail {
  position: absolute;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 18px;
  overflow: hidden;
  background: rgba(5,13,20,.78);
  backdrop-filter: blur(16px);
}
.capability-rail div { display: flex; gap: 12px; align-items: center; padding: 18px 20px; border-right: 1px solid var(--line); }
.capability-rail div:last-child { border-right: 0; }
.capability-rail span { color: var(--accent); font-size: 11px; font-weight: 900; letter-spacing: .12em; }
.capability-rail strong { font-size: 14px; }

.mission-card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.mission-image-card {
  min-height: 420px;
  position: relative;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  isolation: isolate;
}
.mission-image-card:after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(3,9,14,.98) 0%, rgba(3,9,14,.35) 58%, rgba(3,9,14,.08) 100%); }
.mission-image-card img { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.mission-image-card:nth-child(2n) img { object-position: 60% center; }
.mission-image-card:hover img { transform: scale(1.025); }
.mission-image-card > div:last-child { padding: 28px; width: 100%; }
.mission-image-card h3 { font-size: 24px; }
.mission-image-card p { margin: 0; color: #b9c7d2; }
.image-card-index { position: absolute; top: 20px; left: 20px; padding: 7px 10px; border-radius: 999px; background: rgba(4,12,19,.8); border: 1px solid rgba(255,255,255,.18); color: var(--accent-2); font-size: 11px; font-weight: 900; letter-spacing: .1em; }
.section-note { margin: 20px 0 0; }

.split-media { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .9fr); align-items: center; gap: clamp(36px, 7vw, 92px); }
.split-media.reverse { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); }
.media-frame { aspect-ratio: 1 / 1; border-radius: 28px; overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow); background: #050d14; }
.media-frame.wide { aspect-ratio: 1.25 / 1; }
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.split-copy p { color: #c4d0db; }
.spec-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0; }
.spec-list span { padding: 10px 14px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.03); color: #dae6ee; font-size: 13px; font-weight: 800; }
.feature-list { list-style: none; margin: 30px 0 0; padding: 0; display: grid; gap: 16px; }
.feature-list li { padding: 18px 0; border-top: 1px solid var(--line); }
.feature-list strong { display: block; margin-bottom: 4px; color: #fff; }
.feature-list span { color: var(--muted); font-size: 14px; }

.engineering-section { background: radial-gradient(circle at 15% 0%, rgba(57,169,255,.12), transparent 34%), #07121c; border-block: 1px solid var(--line); }
.engineering-layout { display: grid; grid-template-columns: .9fr 1.1fr; align-items: end; gap: 58px; }
.engineering-visual { min-height: 290px; border: 1px solid var(--line); border-radius: 24px; overflow: hidden; background: #050d14; }
.engineering-visual img { width: 100%; height: 100%; object-fit: cover; }
.step-grid { list-style: none; padding: 0; margin: 48px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: 22px; overflow: hidden; }
.step-grid li { padding: 26px; border-right: 1px solid var(--line); min-height: 190px; background: rgba(255,255,255,.025); }
.step-grid li:last-child { border-right: 0; }
.step-grid span { display: block; color: var(--accent-2); font-size: 11px; font-weight: 900; letter-spacing: .12em; margin-bottom: 26px; }
.step-grid strong { display: block; font-size: 18px; }
.step-grid p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }

.module-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.module-grid article { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(150deg, rgba(57,169,255,.08), rgba(255,255,255,.015)); }
.module-grid article > span { color: var(--accent-2); font-size: 12px; letter-spacing: .16em; font-weight: 900; }
.module-grid p { color: var(--muted); margin-bottom: 0; }
.section-action { margin-top: 28px; }

.application-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.application-grid article { position: relative; min-height: 360px; border-radius: 20px; overflow: hidden; border: 1px solid var(--line); isolation: isolate; display: flex; align-items: flex-end; }
.application-grid article:after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(3,9,14,.98), rgba(3,9,14,.05) 68%); }
.application-grid img { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover; }
.application-grid article:nth-child(2n) img { object-position: 65% center; }
.application-grid div { padding: 22px; }
.application-grid h3 { font-size: 18px; }
.application-grid p { margin: 0; color: var(--accent-2); font-size: 11px; text-transform: uppercase; letter-spacing: .08em; }

.delivery-timeline { list-style: none; padding: 0; margin: 42px 0 0; display: grid; grid-template-columns: repeat(8, 1fr); }
.delivery-timeline.six { grid-template-columns: repeat(6, 1fr); }
.delivery-timeline li { position: relative; min-height: 128px; padding: 0 16px 0 0; }
.delivery-timeline li:before { content: ""; position: absolute; top: 24px; left: 45px; right: 0; height: 1px; background: linear-gradient(90deg, var(--accent), var(--line)); }
.delivery-timeline li:last-child:before { display: none; }
.delivery-timeline span { width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center; position: relative; z-index: 1; background: #0e2435; border: 1px solid rgba(57,169,255,.35); color: var(--accent-2); font-weight: 900; }
.delivery-timeline strong { display: block; margin-top: 16px; font-size: 13px; }

.oem-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: 70px; align-items: center; padding: clamp(36px, 6vw, 72px); border: 1px solid rgba(57,169,255,.24); border-radius: 30px; background: linear-gradient(135deg, #0b2639, #08141f 64%); box-shadow: var(--shadow); }
.oem-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; counter-reset: oem; }
.oem-steps li { padding: 15px 18px; border: 1px solid var(--line); border-radius: 14px; color: #dfe8ef; background: rgba(255,255,255,.025); }
.oem-steps.numbered li:before { counter-increment: oem; content: counter(oem, decimal-leading-zero) "  "; color: var(--accent-2); font-weight: 900; }

.final-cta { position: relative; min-height: 600px; display: flex; align-items: center; overflow: hidden; isolation: isolate; border-top: 1px solid var(--line); background: #050d14; }
.final-cta.compact { min-height: 530px; }
.final-cta picture img { object-position: 70% center; }
.final-cta-copy { padding: 90px 0; }
.final-cta-copy > * { max-width: 760px; }

.product-hero,
.system-hero { min-height: 700px; }
.product-hero-copy,
.system-hero-copy { padding-bottom: 90px; }
.breadcrumb a:hover { color: var(--accent-2); }
.faq-list { display: grid; gap: 12px; max-width: 900px; }
.faq-list details { border: 1px solid var(--line); border-radius: 16px; padding: 0 22px; background: rgba(255,255,255,.025); }
.faq-list summary { padding: 20px 34px 20px 0; cursor: pointer; font-weight: 800; }
.faq-list details p { margin: 0 0 20px; color: var(--muted); }

.system-equation { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr auto 1fr auto 1.15fr; gap: 10px; align-items: stretch; }
.system-equation > div { min-width: 0; padding: 24px 12px; display: grid; align-content: center; text-align: center; border: 1px solid var(--line); border-radius: 18px; background: rgba(255,255,255,.025); }
.system-equation > b { display: grid; place-items: center; color: #678197; }
.system-equation span { color: var(--accent-2); font-size: 10px; font-weight: 900; }
.system-equation strong { display: block; font-size: 16px; margin: 6px 0; }
.system-equation small { color: var(--muted); font-size: 11px; }
.system-equation .result { background: rgba(57,169,255,.12); border-color: rgba(57,169,255,.36); }
.compact-grid .mission-image-card { min-height: 370px; }
.document-card { background: linear-gradient(145deg, #10283a, #08141f); }
.document-card:after { display: none; }
.document-graphic { position: absolute; inset: 22% 16% auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.document-graphic span { aspect-ratio: 1; border: 1px solid rgba(130,204,255,.32); border-radius: 14px; display: grid; place-items: center; color: var(--accent-2); font-size: 12px; font-weight: 900; }
.tracking-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.tracking-grid article { padding: 30px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.025); }
.tracking-mark { width: 52px; height: 52px; display: grid; place-items: center; border-radius: 15px; background: rgba(57,169,255,.12); border: 1px solid rgba(57,169,255,.28); color: var(--accent-2); font-weight: 900; font-size: 12px; margin-bottom: 24px; }
.tracking-grid p { color: var(--muted); margin: 0; }

@media(max-width:1050px){
  .application-grid { grid-template-columns: repeat(3, 1fr); }
  .application-grid article:nth-child(4), .application-grid article:nth-child(5) { min-height: 300px; }
  .system-equation { grid-template-columns: repeat(5, 1fr); }
  .system-equation > b { display: none; }
  .system-equation .result { grid-column: 1 / -1; }
  .delivery-timeline { grid-template-columns: repeat(4, 1fr); row-gap: 28px; }
  .delivery-timeline.six { grid-template-columns: repeat(3, 1fr); }
}

@media(max-width:900px){
  .visual-hero,.product-hero,.system-hero { min-height: 720px; }
  .hero-copy,.product-hero-copy,.system-hero-copy { padding-top: 88px; padding-bottom: 190px; }
  .capability-rail { grid-template-columns: 1fr 1fr; bottom: 22px; }
  .capability-rail div:nth-child(2) { border-right: 0; }
  .capability-rail div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .mission-card-grid { grid-template-columns: 1fr 1fr; }
  .split-media,.split-media.reverse,.engineering-layout,.oem-panel { grid-template-columns: 1fr; }
  .split-copy { order: -1; }
  .engineering-visual { min-height: 250px; }
  .step-grid { grid-template-columns: 1fr 1fr; }
  .step-grid li:nth-child(2) { border-right: 0; }
  .step-grid li:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .module-grid,.tracking-grid { grid-template-columns: 1fr 1fr; }
  .oem-panel { gap: 38px; }
}

@media(max-width:620px){
  .visual-hero,.product-hero,.system-hero { min-height: 760px; align-items: flex-end; }
  .hero-media img,.product-hero-media img,.system-hero-media img { object-position: center 16%; }
  .hero-shade,.product-hero-shade,.system-hero-shade { background: linear-gradient(0deg, rgba(3,9,14,.99) 0%, rgba(3,9,14,.92) 46%, rgba(3,9,14,.28) 100%); }
  .hero-copy,.product-hero-copy,.system-hero-copy { padding-top: 300px; padding-bottom: 210px; }
  .hero-copy h1,.product-hero-copy h1,.system-hero-copy h1 { font-size: clamp(42px, 13vw, 58px); }
  .hero-subtitle { font-size: 16px; }
  .capability-rail { width: calc(100% - 28px); }
  .capability-rail div { padding: 14px 12px; gap: 8px; }
  .capability-rail strong { font-size: 12px; }
  .mission-card-grid { grid-template-columns: 1fr; }
  .mission-image-card,.compact-grid .mission-image-card { min-height: 350px; }
  .media-frame,.media-frame.wide { aspect-ratio: 1 / 1; }
  .engineering-layout { gap: 28px; }
  .engineering-visual { min-height: 190px; }
  .step-grid { grid-template-columns: 1fr; }
  .step-grid li { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .step-grid li:last-child { border-bottom: 0; }
  .module-grid,.tracking-grid,.application-grid { grid-template-columns: 1fr; }
  .application-grid article,.application-grid article:nth-child(4),.application-grid article:nth-child(5) { min-height: 330px; }
  .delivery-timeline,.delivery-timeline.six { display: grid; grid-template-columns: 1fr; margin-left: 5px; }
  .delivery-timeline li { min-height: 88px; display: grid; grid-template-columns: 48px 1fr; align-items: start; gap: 16px; }
  .delivery-timeline li:before { top: 48px; left: 24px; right: auto; width: 1px; height: 40px; background: linear-gradient(180deg, var(--accent), var(--line)); }
  .delivery-timeline strong { margin-top: 13px; }
  .oem-panel { padding: 28px 22px; }
  .final-cta,.final-cta.compact { min-height: 580px; align-items: flex-end; }
  .final-cta picture img { object-position: center 20%; }
  .final-cta-shade { background: linear-gradient(0deg, rgba(3,9,14,.99) 0%, rgba(3,9,14,.9) 58%, rgba(3,9,14,.2) 100%); }
  .final-cta-copy { padding: 260px 0 64px; }
  .system-equation { grid-template-columns: 1fr; }
  .system-equation .result { grid-column: auto; }
}