:root {
  --st-ink: #171717;
  --st-muted: #525252;
  --st-soft-text: #737373;
  --st-line: #e5e5e5;
  --st-soft: #f7f8fa;
  --st-white: #ffffff;
  --st-primary: #4a4aff;
  --st-primary-soft: #ecf0ff;
  --st-green: #09aa74;
  --st-green-soft: #ebfef5;
  --st-orange: #f97316;
  --st-cyan: #00a6f4;
  --st-dark: #0a0a0a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.subtitle-tech {
  margin: 0;
  color: var(--st-ink);
  background: var(--st-white);
  font-family: Mulish, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

.subtitle-tech a { color: inherit; }
.subtitle-tech p { margin: 0 0 16px; color: var(--st-muted); font-size: 17px; line-height: 1.75; }
.subtitle-tech h1,
.subtitle-tech h2,
.subtitle-tech h3 { margin: 0; color: var(--st-ink); letter-spacing: 0; }
.subtitle-tech h1 { max-width: 720px; font-size: 56px; line-height: 1.04; }
.subtitle-tech h2 { font-size: 48px; line-height: 1.08; }
.subtitle-tech h3 { font-size: 22px; line-height: 1.28; }
.subtitle-tech ul { margin: 0; padding-left: 20px; }
.subtitle-tech li { margin: 8px 0; color: var(--st-muted); font-size: 15px; line-height: 1.6; }

.shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.band { position: relative; padding: 84px 0; border-bottom: 1px solid var(--st-line); }
.band-soft { background: var(--st-soft); }
.band-ink { color: var(--st-white); background: var(--st-dark); border-color: #262626; }

.site-top {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid rgba(23, 23, 23, .08);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(14px);
}
.site-nav {
  width: min(1180px, calc(100% - 40px));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-size: 21px; font-weight: 850; }
.brand img { width: 30px; height: 30px; object-fit: contain; }
.nav-links { display: flex; align-items: center; gap: 22px; margin-left: auto; }
.nav-links a { color: #404040; text-decoration: none; font-size: 14px; font-weight: 750; }
.nav-links a:hover { color: var(--st-primary); }

.button {
  display: inline-flex;
  min-height: 42px;
  padding: 0 20px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 850;
  white-space: nowrap;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff !important; background: var(--st-primary); box-shadow: 0 12px 28px rgba(74, 74, 255, .22); }
.button-dark { color: #fff !important; background: var(--st-dark); }
.button-light { color: var(--st-dark) !important; background: #fff; }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--st-ink); font-size: 15px; font-weight: 820; text-decoration: none; }
.text-link span { color: var(--st-primary); font-size: 20px; }

.hero {
  min-height: clamp(650px, 76vh, 720px);
  padding: 0;
  overflow: hidden;
  color: #fff;
  background: #101114;
  border-bottom-color: #292a31;
}
.hero:before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(90deg, #000 0%, rgba(0,0,0,.55) 70%, transparent 100%);
}
.hero-layout { position: relative; min-height: inherit; display: flex; align-items: center; }
.hero-copy { position: relative; z-index: 3; width: 52%; padding: 48px 0 52px; }
.hero h1 { color: #fff; }
.hero-lead { max-width: 650px; margin-top: 24px !important; color: #c8cbd4 !important; font-size: 18px !important; line-height: 1.65 !important; }
.eyebrow,
.kicker { margin: 0 0 14px !important; color: var(--st-primary); font-size: 13px !important; line-height: 1.3 !important; font-weight: 900; text-transform: uppercase; }
.hero .eyebrow { color: #aeb6ff; }
.kicker-light { color: #9cabff !important; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 22px; align-items: center; margin-top: 30px; }
.hero .text-link { color: #fff; }
.hero-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; max-width: 620px; margin-top: 30px; background: #343640; border: 1px solid #343640; }
.hero-metrics div { min-height: 96px; padding: 17px 18px; background: rgba(17, 18, 22, .96); }
.hero-metrics strong { display: block; color: #fff; font-size: 28px; line-height: 1; }
.hero-metrics span { display: block; margin-top: 9px; color: #a8abb5; font-size: 11px; line-height: 1.35; }

.hero-evidence {
  position: absolute;
  z-index: 2;
  top: 50%;
  right: 0;
  width: 560px;
  margin: 0;
  padding: 16px;
  color: #fff;
  background: rgba(19, 20, 25, .96);
  border: 1px solid #343741;
  border-radius: 8px;
  box-shadow: -30px 30px 90px rgba(0,0,0,.42);
  transform: translateY(-50%);
}
.evidence-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 2px 2px 14px; color: #9296a2; font: 800 9px ui-monospace, SFMono-Regular, Menlo, monospace; }
.evidence-toolbar span:first-child { display: inline-flex; align-items: center; gap: 8px; color: #c7cad2; }
.evidence-toolbar i { width: 7px; height: 7px; border-radius: 50%; background: var(--st-green); box-shadow: 0 0 0 5px rgba(9,170,116,.13); }
.evidence-workstation { display: grid; grid-template-columns: 224px minmax(0, 1fr); gap: 14px; }
.evidence-video-wrap { position: relative; aspect-ratio: 9 / 16; overflow: hidden; background: #08090b; border: 1px solid #3c3f49; }
.evidence-video-wrap video { width: 100%; height: 100%; display: block; object-fit: cover; }
.evidence-video-wrap:after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(255,255,255,.08); pointer-events: none; }
.evidence-tag { position: absolute; z-index: 2; padding: 5px 7px; color: #fff; background: rgba(9, 170, 116, .92); border: 1px solid rgba(255,255,255,.34); font: 900 7px ui-monospace, SFMono-Regular, Menlo, monospace; box-shadow: 0 4px 12px rgba(0,0,0,.28); }
.evidence-tag-dialogue { left: 50%; bottom: 25%; transform: translateX(-50%); white-space: nowrap; }
.evidence-tag-disclaimer { top: 26%; left: 5%; color: #fff; background: rgba(239,68,68,.92); }
.evidence-tag-card { top: 17%; right: 3%; max-width: 82px; background: rgba(249,115,22,.94); text-align: right; }
.evidence-output { min-width: 0; padding: 16px; background: #0d0e11; border: 1px solid #2d3038; }
.output-head { display: flex; justify-content: space-between; align-items: center; color: #747985; font: 800 9px ui-monospace, SFMono-Regular, Menlo, monospace; }
.output-head strong { color: #aeb6ff; }
.output-cue { margin-top: 24px; padding: 14px; background: #191b21; border-left: 3px solid var(--st-primary); }
.output-cue > span { color: #777c88; font: 800 9px ui-monospace, SFMono-Regular, Menlo, monospace; }
.output-cue time { display: block; margin-top: 9px; color: #9da1ad; font: 700 8px ui-monospace, SFMono-Regular, Menlo, monospace; }
.output-cue p { margin: 12px 0 0; color: #fff; font-size: 18px; font-weight: 850; line-height: 1.4; }
.output-decision { display: flex; justify-content: space-between; gap: 10px; padding: 12px 0; border-bottom: 1px solid #252831; color: #9ca0aa; font-size: 11px; }
.output-decision b { color: #75e5be; font-size: 10px; text-transform: uppercase; }
.output-decision + .output-decision b { color: #ff9f6e; }
.output-note { margin: 16px 0 0 !important; color: #878b96 !important; font-size: 11px !important; line-height: 1.55 !important; }
.hero-evidence figcaption { margin-top: 12px; color: #777b86; font-size: 10px; line-height: 1.5; }

.video-explainer-section { color: #fff; background: #0d0e11; border-color: #292b32; }
.video-explainer-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .65fr); gap: 70px; align-items: end; }
.video-explainer-heading h2 { max-width: 780px; color: #fff; }
.video-explainer-heading > p { margin: 0; color: #aeb1ba; }
.video-explainer-layout { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(280px, .65fr); gap: 24px; margin-top: 42px; align-items: stretch; }
.youtube-frame { position: relative; min-width: 0; aspect-ratio: 16 / 9; overflow: hidden; background: #050506; border: 1px solid #30323a; border-radius: 8px; box-shadow: 0 28px 74px rgba(0, 0, 0, .32); }
.youtube-frame iframe { width: 100%; height: 100%; display: block; border: 0; }
.video-chapters { min-width: 0; padding: 20px; background: #17181d; border: 1px solid #30323a; border-radius: 8px; }
.video-meta { display: flex; flex-wrap: wrap; gap: 8px; padding-bottom: 16px; border-bottom: 1px solid #30323a; }
.video-meta span { padding: 5px 8px; color: #aeb6ff; background: #242631; font-size: 10px; font-weight: 850; }
.video-chapters ol { margin: 10px 0 0; padding: 0; list-style: none; }
.video-chapters li { margin: 0; }
.video-chapters a { display: grid; grid-template-columns: 48px minmax(0, 1fr); gap: 10px; align-items: center; padding: 10px 4px; color: #d4d6dc; border-bottom: 1px solid #292b32; text-decoration: none; }
.video-chapters li:last-child a { border-bottom: 0; }
.video-chapters a:hover { color: #fff; }
.video-chapters time { color: #8990ff; font: 750 10px ui-monospace, SFMono-Regular, Menlo, monospace; }
.video-chapters span { min-width: 0; overflow: hidden; font-size: 12px; font-weight: 720; text-overflow: ellipsis; white-space: nowrap; }

.split-heading { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 70px; align-items: start; }
.split-heading-light h2 { color: #fff; }
.split-heading-light .answer-copy p { color: #b7bac4; }
.answer-copy .answer { color: var(--st-ink); font-size: 21px; line-height: 1.6; }
.comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 48px; }
.path-panel { position: relative; min-height: 320px; padding: 32px; overflow: hidden; border: 1px solid var(--st-line); background: #fff; }
.path-panel:after { content: ""; position: absolute; right: -70px; bottom: -70px; width: 190px; height: 190px; border: 32px solid var(--st-primary-soft); border-radius: 50%; }
.path-panel-asr:after { border-color: var(--st-green-soft); }
.path-number { margin-bottom: 48px; color: var(--st-primary); font: 800 12px ui-monospace, SFMono-Regular, Menlo, monospace; }
.path-panel-asr .path-number { color: var(--st-green); }
.path-panel h3 { max-width: 420px; font-size: 28px; }
.path-panel p { max-width: 520px; margin-top: 16px; }
.path-panel ul { position: relative; z-index: 1; margin-top: 18px; }

.temporal-lab { margin-top: 48px; padding: 24px; border: 1px solid #343640; background: #131419; }
.lab-heading { display: flex; justify-content: space-between; color: #9ca0ad; font: 900 12px ui-monospace, SFMono-Regular, Menlo, monospace; }
.frame-sequence { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.temporal-frame { position: relative; aspect-ratio: 9 / 16; overflow: hidden; background: #24262d; border: 1px solid #454855; }
.temporal-frame img { width: 100%; height: 100%; display: block; object-fit: cover; }
.temporal-frame:after { content: ""; position: absolute; left: 12%; right: 12%; bottom: 26%; height: 10%; border: 2px solid #75e5be; box-shadow: 0 0 0 999px rgba(0,0,0,.08); }
.temporal-frame .frame-label { position: absolute; z-index: 2; top: 10px; left: 10px; min-width: 112px; display: block; padding: 9px 11px; color: #fff; background: rgba(10,10,10,.86); border-left: 3px solid #75e5be; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.frame-label b { display: block; font-size: 16px; line-height: 1.1; }
.frame-label small { display: block; margin-top: 5px; color: #b9bdc7; font-size: 10px; }
.temporal-connector { position: relative; height: 34px; margin: 0 12.5%; }
.temporal-connector:before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 17px; border-bottom: 1px solid #4a4aff; border-left: 1px solid #4a4aff; border-right: 1px solid #4a4aff; }
.temporal-connector i { position: absolute; left: 50%; top: 17px; width: 1px; height: 17px; background: #4a4aff; }
.event-result { margin-top: 22px; display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; padding: 22px; background: #1d1f25; }
.event-result span { display: block; color: #8c909b; font-size: 10px; font-weight: 900; }
.event-result strong { display: block; margin-top: 7px; color: #fff; font-size: 20px; }
.event-result code { padding: 12px 16px; color: #d7daff; background: #0d0e11; font-size: 12px; line-height: 1.7; }
.event-result code span { display: inline; margin: 0; color: #fff; font-size: inherit; font-weight: 800; }
.temporal-lab figcaption { margin-top: 16px; color: #858995; font-size: 11px; line-height: 1.55; }
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 26px; background: #33353e; border: 1px solid #33353e; }
.process-steps article { min-height: 220px; padding: 26px; background: #15161b; }
.process-steps article > span { color: #7b7f8b; font: 800 12px ui-monospace, SFMono-Regular, Menlo, monospace; }
.process-steps h3 { margin-top: 36px; color: #fff; }
.process-steps p { margin-top: 12px; color: #a8abb4; font-size: 15px; }

.filter-layout { display: grid; grid-template-columns: minmax(0, .85fr) minmax(500px, 1.15fr); gap: 70px; align-items: center; }
.large-copy { margin-top: 24px !important; font-size: 20px !important; }
.feature-list { margin-top: 32px; display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--st-line); }
.feature-list div { padding: 18px 12px 18px 0; border-bottom: 1px solid var(--st-line); }
.feature-list strong { display: block; font-size: 14px; }
.feature-list span { display: block; margin-top: 5px; color: var(--st-soft-text); font-size: 13px; line-height: 1.45; }
.filter-visual { margin: 0; padding: 16px; background: #111216; border: 1px solid #2f323a; border-radius: 8px; }
.filter-evidence-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.filter-evidence-row { display: grid; grid-template-columns: minmax(170px, .62fr) minmax(0, 1.38fr); gap: 14px; min-width: 0; padding: 12px; background: #0c0d10; border: 1px solid #30333b; }
.filter-shot { position: relative; min-width: 0; aspect-ratio: 9 / 16; overflow: hidden; background: #0a0a0a; }
.filter-shot img { width: 100%; height: 100%; display: block; object-fit: cover; }
.filter-shot:after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(255,255,255,.14); pointer-events: none; }
.filter-verdicts { display: flex; min-width: 0; flex-direction: column; justify-content: center; }
.filter-verdict { padding: 16px 14px; border-bottom: 1px solid #2c2f37; }
.filter-verdict:last-child { border-bottom: 0; }
.filter-verdict > span { display: block; color: #ff8d8d; font: 900 14px ui-monospace, SFMono-Regular, Menlo, monospace; }
.filter-verdict.verdict-keep > span { color: #75e5be; }
.filter-verdict strong { display: block; margin-top: 8px; color: #fff; font-size: 22px; line-height: 1.25; }
.filter-verdict p,
.filter-principle p { margin: 7px 0 0 !important; color: #a8abb5 !important; font-size: 13px !important; line-height: 1.5 !important; }
.filter-principle { margin-top: auto; padding: 18px 14px; background: #1d2030; border-left: 3px solid var(--st-primary); }
.filter-principle strong { color: #fff; font-size: 20px; line-height: 1.25; }
.filter-visual figcaption { margin-top: 12px; color: #9296a0; font-size: 10px; line-height: 1.5; }

.segmentation-visual { margin-top: 46px; display: grid; grid-template-columns: .85fr auto 1.15fr; gap: 28px; align-items: stretch; }
.transcript-rail { padding: 28px; border: 1px solid var(--st-line); background: #fff; }
.rail-label { color: var(--st-soft-text); font: 800 10px ui-monospace, SFMono-Regular, Menlo, monospace; }
.transcript-rail p { margin-top: 42px; color: #262626; font-size: 22px; line-height: 1.7; }
.word-ticks { height: 48px; margin-top: 30px; display: flex; align-items: end; gap: 6px; }
.word-ticks i { flex: 1; height: 20%; background: #b8bbc4; }
.word-ticks i:nth-child(3n) { height: 75%; background: #4a4aff; }
.word-ticks i:nth-child(4n) { height: 48%; }
.segment-rules { display: flex; flex-direction: column; justify-content: center; gap: 12px; }
.segment-rules span { padding: 8px 10px; color: #4536f5; background: var(--st-primary-soft); font-size: 9px; font-weight: 900; text-align: center; }
.cue-stack { display: grid; gap: 10px; }
.cue-stack > div { position: relative; padding: 18px 54px 18px 18px; border: 1px solid var(--st-line); background: #fff; }
.cue-stack time { color: var(--st-soft-text); font: 700 9px ui-monospace, SFMono-Regular, Menlo, monospace; }
.cue-stack p { margin: 7px 0 0; color: var(--st-ink); font-size: 16px; line-height: 1.4; }
.cue-stack span { position: absolute; top: 50%; right: 16px; width: 28px; height: 28px; display: grid; place-items: center; color: #fff; background: var(--st-green); border-radius: 50%; font-size: 10px; font-weight: 900; transform: translateY(-50%); }

.reference-ranges { margin-top: 46px; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.reference-ranges article { padding: 30px; border: 1px solid var(--st-line); }
.range-head { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; }
.range-head span { font-size: 14px; font-weight: 850; }
.range-head strong { color: var(--st-primary); font-size: 28px; }
.reference-ranges article:nth-child(2) .range-head strong { color: var(--st-green); }
.range-bar { height: 8px; margin-top: 22px; overflow: hidden; background: #eceef2; }
.range-bar span { display: block; height: 100%; background: var(--st-primary); }
.range-bar-asr span { background: var(--st-green); }
.reference-ranges p { margin-top: 20px; font-size: 15px; }
.reference-ranges a { color: var(--st-primary); font-size: 13px; font-weight: 850; }
.source-decision { margin-top: 22px; padding: 24px; color: #2c2f40; background: var(--st-primary-soft); border-left: 4px solid var(--st-primary); font-size: 17px; line-height: 1.65; }

.benchmark-section { color: #fff; background: #15161a; border-color: #2b2d34; }
.benchmark-layout { display: grid; grid-template-columns: minmax(0, .7fr) minmax(560px, 1.3fr); gap: 66px; align-items: center; }
.benchmark-copy h2 { color: #fff; }
.benchmark-copy > p { margin-top: 24px; color: #b8bbc4; }
.method-note { margin-top: 30px; padding: 18px; border: 1px solid #353840; }
.method-note strong { display: block; color: #fff; font-size: 13px; }
.method-note span { display: block; margin-top: 6px; color: #989ca7; font-size: 13px; line-height: 1.5; }
.benchmark-visual { padding: 28px; background: #0d0e11; border: 1px solid #34363e; }
.metric-block + .metric-block { margin-top: 32px; }
.metric-title { display: flex; justify-content: space-between; color: #777b86; font: 800 9px ui-monospace, SFMono-Regular, Menlo, monospace; }
.metric-row { display: grid; grid-template-columns: 110px 1fr 70px; gap: 12px; align-items: center; margin-top: 14px; }
.metric-row strong { color: #fff; font-size: 12px; }
.metric-row b { color: #aeb6ff; font-size: 19px; text-align: right; }
.metric-row-asr b { color: #75e5be; }
.metric-track { height: 9px; overflow: hidden; background: #272931; }
.metric-track i { display: block; height: 100%; background: var(--st-primary); }
.metric-row-asr .metric-track i { background: var(--st-green); }
.benchmark-table { margin-top: 30px; border-top: 1px solid #30323a; }
.benchmark-table div { display: flex; justify-content: space-between; gap: 20px; padding: 13px 0; border-bottom: 1px solid #30323a; }
.benchmark-table span { color: #9296a0; font-size: 12px; }
.benchmark-table strong { max-width: 58%; color: #fff; font-size: 12px; line-height: 1.45; text-align: right; }
.benchmark-foot { margin: 22px 0 0 !important; color: #aeb1bb !important; font-size: 13px !important; line-height: 1.65 !important; }
.benchmark-foot strong { color: #fff; }

.operations-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.workload-scale { padding: 30px; border: 1px solid var(--st-line); }
.scale-row { display: grid; grid-template-columns: 150px 1fr minmax(170px, auto); gap: 14px; align-items: center; padding: 18px 0 30px; }
.scale-row + .scale-row { border-top: 1px solid var(--st-line); }
.scale-row > span { font-size: 12px; font-weight: 850; }
.scale-row i { height: 12px; background: var(--st-green); }
.scale-high i { background: var(--st-orange); }
.scale-row strong { font-size: 22px; line-height: 1.2; text-align: right; }
.scale-row small { grid-column: 3; color: var(--st-soft-text); font-size: 10px; }
.scale-caption { margin-top: 8px; color: var(--st-soft-text); font-size: 11px; text-transform: uppercase; }

.propagation-chain { margin-top: 46px; display: grid; grid-template-columns: repeat(5, 1fr auto) 1fr; align-items: center; }
.propagation-chain div { min-height: 134px; padding: 20px; border: 1px solid var(--st-line); background: #fff; }
.propagation-chain div span { color: var(--st-primary); font: 800 10px ui-monospace, SFMono-Regular, Menlo, monospace; }
.propagation-chain div strong { display: block; margin-top: 28px; font-size: 15px; }
.propagation-chain div small { display: block; margin-top: 6px; color: var(--st-soft-text); }
.propagation-chain > i { width: 22px; height: 1px; background: #a1a1a1; }

.workflow-grid { margin-top: 44px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.workflow-grid article { min-height: 290px; padding: 28px; border-top: 4px solid var(--st-primary); background: var(--st-soft); }
.workflow-grid article:nth-child(2) { border-color: var(--st-green); }
.workflow-grid article:nth-child(3) { border-color: var(--st-cyan); }
.workflow-grid article > span { color: var(--st-primary); font: 900 11px ui-monospace, SFMono-Regular, Menlo, monospace; }
.workflow-grid h3 { margin-top: 42px; }
.workflow-grid p { margin-top: 14px; font-size: 15px; }
.workflow-grid a { display: inline-block; margin-top: 8px; color: var(--st-primary); font-size: 13px; font-weight: 850; }
.related-links { margin-top: 18px; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--st-line); }
.related-links a { min-height: 92px; padding: 20px; text-decoration: none; border-left: 1px solid var(--st-line); }
.related-links a:first-child { border-left: 0; }
.related-links span { display: block; color: var(--st-soft-text); font-size: 10px; text-transform: uppercase; }
.related-links strong { display: block; margin-top: 8px; font-size: 14px; }

.faq-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 80px; align-items: start; }
.faq-intro { position: sticky; top: 110px; }
.faq-list { border-top: 1px solid var(--st-line); }
.faq-list details { border-bottom: 1px solid var(--st-line); }
.faq-list summary { position: relative; padding: 24px 44px 24px 0; cursor: pointer; color: var(--st-ink); font-size: 18px; font-weight: 850; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary:after { content: "+"; position: absolute; top: 21px; right: 4px; color: var(--st-primary); font-size: 25px; font-weight: 500; }
.faq-list details[open] summary:after { content: "−"; }
.faq-list details p { padding: 0 44px 24px 0; font-size: 15px; }

.closing-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 90px; align-items: end; }
.closing h2 { color: #fff; }
.closing p { color: #b9bcc5; }
.closing .button { margin-top: 14px; }
@media (max-width: 1080px) {
  .subtitle-tech h1 { font-size: 49px; }
  .hero-copy { width: 54%; }
  .hero-evidence { right: 0; width: 480px; }
  .evidence-workstation { grid-template-columns: 188px minmax(0, 1fr); }
  .filter-layout,
  .benchmark-layout,
  .video-explainer-layout { grid-template-columns: 1fr; }
  .video-chapters ol { display: grid; grid-template-columns: 1fr 1fr; column-gap: 18px; }
  .filter-visual { max-width: 760px; }
  .benchmark-copy { max-width: 760px; }
  .propagation-chain { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .propagation-chain > i { display: none; }
}

@media (max-width: 760px) {
  .shell { width: min(100% - 28px, 680px); }
  .band { padding: 60px 0; }
  .subtitle-tech h1 { font-size: 42px; line-height: 1.06; }
  .subtitle-tech h2 { font-size: 35px; }
  .subtitle-tech p { font-size: 16px; }
  .nav-links { display: none; }
  .site-nav { width: calc(100% - 28px); min-height: 62px; }
  .site-nav .button { margin-left: auto; min-height: 38px; padding: 0 13px; font-size: 12px; }
  .hero { min-height: auto; }
  .hero-layout { display: block; padding: 54px 0 34px; }
  .hero-copy { width: 100%; padding: 0; }
  .hero-lead { font-size: 18px !important; }
  .hero-metrics { max-width: none; }
  .hero-evidence { position: relative; top: auto; right: auto; width: min(100%, 560px); margin: 42px auto 0; transform: none; }
  .split-heading,
  .video-explainer-heading,
  .comparison-grid,
  .filter-layout,
  .reference-ranges,
  .benchmark-layout,
  .operations-layout,
  .workflow-grid,
  .faq-layout,
  .closing-layout { grid-template-columns: 1fr; gap: 30px; }
  .video-explainer-heading { gap: 20px; }
  .video-explainer-layout { gap: 16px; margin-top: 30px; }
  .video-chapters { padding: 16px; }
  .video-chapters ol { grid-template-columns: 1fr; }
  .path-panel { min-height: 0; padding: 24px; }
  .path-number { margin-bottom: 28px; }
  .path-panel h3 { font-size: 24px; }
  .frame-sequence { grid-template-columns: repeat(4, 1fr); gap: 7px; }
  .temporal-lab { padding: 14px; }
  .event-result { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .filter-layout { gap: 36px; }
  .feature-list { grid-template-columns: 1fr; }
  .filter-visual { padding: 10px; }
  .filter-evidence-row { grid-template-columns: minmax(140px, .62fr) minmax(0, 1.38fr); gap: 10px; padding: 9px; }
  .filter-verdict { padding: 12px 10px; }
  .filter-verdict > span { font-size: 10px; }
  .filter-verdict strong { font-size: 16px; }
  .filter-principle { padding: 14px 10px; }
  .filter-principle strong { font-size: 17px; }
  .segmentation-visual { grid-template-columns: 1fr; }
  .segment-rules { display: grid; grid-template-columns: 1fr 1fr; }
  .benchmark-visual { padding: 18px; }
  .metric-row { grid-template-columns: 88px 1fr 60px; gap: 8px; }
  .metric-row b { font-size: 15px; }
  .benchmark-table div { align-items: start; }
  .benchmark-table strong { text-align: right; }
  .scale-row { grid-template-columns: 95px 1fr; }
  .scale-row strong { grid-column: 1 / -1; }
  .scale-row small { grid-column: 1 / -1; }
  .propagation-chain { grid-template-columns: 1fr 1fr; }
  .related-links { grid-template-columns: 1fr; }
  .related-links a { border-left: 0; border-top: 1px solid var(--st-line); }
  .related-links a:first-child { border-top: 0; }
  .faq-intro { position: static; }
}

@media (max-width: 420px) {
  .subtitle-tech h1 { font-size: 36px; }
  .subtitle-tech h2 { font-size: 31px; }
  .hero-actions { align-items: stretch; }
  .hero-actions .button,
  .hero-actions .text-link { width: 100%; justify-content: center; }
  .hero-metrics { grid-template-columns: 1fr; }
  .hero-metrics div { min-height: 0; padding: 14px 16px; }
  .evidence-workstation { grid-template-columns: 1fr; }
  .evidence-video-wrap { width: min(100%, 260px); margin: 0 auto; }
  .output-cue { margin-top: 16px; }
  .frame-sequence { grid-template-columns: 1fr 1fr; }
  .filter-evidence-row { grid-template-columns: 1fr; }
  .filter-shot { width: min(100%, 260px); margin: 0 auto; }
  .filter-verdict > span { font-size: 12px; }
  .filter-verdict strong { font-size: 19px; }
  .process-steps { grid-template-columns: 1fr; }
  .propagation-chain { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *:before, *:after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}