.ch-h2 {
  max-width: 30ch;
  margin: 0 0 var(--sp-4);
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 650;
  line-height: 1.14;
  letter-spacing: -.012em;
  color: var(--ink);
}

.ch-p {
  max-width: var(--wrap-txt);
  margin: 0 0 var(--sp-4);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--ink);
}



.ch-hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: min(84vh, 720px);
  padding-block-end: clamp(2.5rem, 5vw, 4rem);
  overflow: hidden;
  background: var(--ground-cool);
}

.ch-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ch-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, var(--scrim) 0%, var(--scrim) 46%, transparent 80%);
}

.ch-hero__in { position: relative; z-index: 1; }

.ch-hero__band { max-width: 46%; }

.ch-hero__h1 {
  margin: var(--sp-4) 0;
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 3.3vw, 2.85rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -.022em;
  color: var(--ink);
}

.ch-hero__sub {
  max-width: 46ch;
  margin: 0 0 var(--sp-6);
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--ink);
}


.ch-hero__fig {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--sp-3);
  margin: 0;
  padding-block-start: var(--sp-4);
  border-block-start: 1px solid var(--rule);
}

.ch-hero__figtail {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: .02em;
  line-height: 1.4;
  color: var(--ink-muted);
}



.ch-grid {
  background: var(--ground);
  border-block-start: 1px solid var(--rule);
}

.ch-fam {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--sp-6);
  margin-block-start: var(--sp-8);
}

.ch-cell {
  display: grid;
  gap: var(--sp-3);
  align-content: start;
  padding-block-start: var(--sp-4);
  border-block-start: 2px solid var(--rule);
}

.ch-cell--lead {
  grid-column: span 2;
  grid-row: span 2;
}


.ch-cell__no {
  display: inline-block;
  padding-block-end: var(--sp-1);
  border-block-end: 2px solid var(--accent);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .18em;
  color: var(--ink-muted);
}

.ch-cell__t {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 650;
  line-height: 1.24;
}

.ch-cell--lead .ch-cell__t { font-size: clamp(1.5rem, 2.2vw, 1.9rem); }

.ch-cell__t a {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: .2em;
}

.ch-shot {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--r-flat);
  background: var(--ground-cool);
}

.ch-shot > img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.ch-shot--wide > img { aspect-ratio: 16 / 9; }

.ch-shot::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: var(--ground);
  opacity: .1;
}


.ch-shot--draw {
  padding: var(--sp-3);
  background: var(--sheet);
  border: 1px solid var(--rule-soft);
}

.ch-shot--draw::after { display: none; }

.ch-flow,
.ch-loop {
  display: block;
  width: 100%;
  height: auto;
}

.ch-flow__line,
.ch-loop__line {
  fill: none;
  stroke: var(--ink-muted);
  stroke-width: 1.5;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.ch-flow__cold,
.ch-loop__cold {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linecap: square;
}

.ch-flow__warm,
.ch-loop__warm {
  fill: none;
  stroke: var(--ink-muted);
  stroke-width: 1.5;
  stroke-linecap: square;
}

.ch-flow__lbl text,
.ch-loop__lbl text {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  fill: var(--ink-muted);
}

.ch-cell__spec {
  display: grid;
  gap: 0;
  margin: 0;
}

.ch-cell__spec > div {
  display: grid;
  grid-template-columns: minmax(0, 6.5rem) minmax(0, 1fr);
  gap: var(--sp-2);
  padding-block: var(--sp-2);
  border-block-start: 1px solid var(--rule-soft);
}

.ch-cell__spec dt {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.ch-cell__spec dd {
  margin: 0;
  font-size: var(--fs-micro);
  line-height: 1.45;
  color: var(--ink);
}

.ch-cell__when {
  margin: 0;
  padding-block-start: var(--sp-2);
  border-block-start: 1px solid var(--rule-soft);
  font-size: var(--fs-micro);
  line-height: 1.5;
  color: var(--ink-muted);
}

.ch-cell--lead .ch-cell__spec dd,
.ch-cell--lead .ch-cell__when { font-size: var(--fs-small); }


.ch-cell--note {
  grid-column: span 2;
  gap: var(--sp-4);
  align-content: center;
  padding: var(--sp-6);
  background: var(--sheet);
  border: 1px solid var(--rule);
  border-block-start: 2px solid var(--rule);
}

.ch-note {
  max-width: 52ch;
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.55;
  color: var(--ink-muted);
}

.ch-note--after {
  max-width: 86ch;
  margin-block-start: var(--sp-6);
  padding-block-start: var(--sp-4);
  border-block-start: 1px solid var(--rule-soft);
  color: var(--ink);
}

.ch-note__link {
  margin: 0;
  font-size: var(--fs-small);
  font-weight: 600;
}



.ch-mfg {
  background: var(--sheet);
  border-block-start: 1px solid var(--rule);
}

.ch-table th[scope="row"] { font-weight: 600; white-space: nowrap; }

.ch-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink);
}

.ch-tag--ext { color: var(--ink-muted); }



.ch-certs {
  background: var(--ground);
  border-block-start: 1px solid var(--rule);
}

.ch-certs__grid {  

  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.ch-reports {
  margin: var(--sp-6) 0 0;
  padding: 0;
  list-style: none;
}

.ch-report {
  display: grid;
  grid-template-columns: minmax(0, 9rem) minmax(0, 1fr);
  gap: var(--sp-4);
  padding-block: var(--sp-3);
  border-block-start: 1px solid var(--rule-soft);
}

.ch-report:last-child { border-block-end: 1px solid var(--rule-soft); }

.ch-report__k {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.ch-report__v {
  font-size: var(--fs-small);
  line-height: 1.5;
  color: var(--ink);
}

.ch-certs__imgs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
}


.ch-scan {
  display: grid;
  gap: var(--sp-2);
  align-content: start;
  margin: 0;
}

.ch-scan img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: contain;
  background: var(--sheet);
  border-radius: var(--r-flat);
}

.ch-scan figcaption {
  font-size: var(--fs-micro);
  line-height: 1.45;
  color: var(--ink-muted);
}



.ch-cta__in {
  display: grid;
  gap: var(--sp-4);
  justify-items: start;
}

.ch-cta .ch-h2 { max-width: 28ch; margin: 0; }
.ch-cta__acts { margin: 0; }



@media (max-width: 1080px) {
  .ch-fam { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .ch-cell--lead { grid-column: span 2; grid-row: span 2; }
  .ch-cell--note { grid-column: span 3; }
}

@media (max-width: 900px) {
  .ch-hero {
    min-height: auto;
    padding-block: var(--head-h) clamp(2.5rem, 8vw, 4rem);
  }
  .ch-hero__band { max-width: 100%; }
  .ch-hero::after { background: var(--scrim); }
  .ch-certs__grid { grid-template-columns: minmax(0, 1fr); }
  .ch-fam { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ch-cell--note { grid-column: span 2; }
}

@media (max-width: 620px) {
  .ch-fam { grid-template-columns: minmax(0, 1fr); gap: var(--sp-8); }
  .ch-cell--lead,
  .ch-cell--note { grid-column: span 1; }
  .ch-cell--lead { grid-row: span 1; }
  .ch-certs__imgs { grid-template-columns: minmax(0, 1fr); }
  .ch-report { grid-template-columns: minmax(0, 1fr); gap: var(--sp-1); }
  .ch-cell__spec > div { grid-template-columns: minmax(0, 1fr); gap: var(--sp-1); }
}