.page-about {
  --about-scale-w: 62px;
  --about-hover: rgba(56, 214, 201, .045);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  padding: 28px 0 44px;
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(56, 214, 201, .10), transparent 62%),
    linear-gradient(180deg, var(--ce-void) 0%, var(--ce-deep) 100%);
  border-bottom: 1px solid var(--ce-line);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 30px;
}

.page-about .about-hero__lede h1 {
  margin: 14px 0 0;
  font-size: clamp(27px, 6.2vw, 44px);
  line-height: 1.24;
  font-weight: 700;
  letter-spacing: -.012em;
  color: var(--ce-ink);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ce-ink);
  opacity: .88;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 30px;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-left: 14px;
  border-left: 1px solid var(--ce-line);
}

.page-about .about-hero__facts .ce-mono {
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: .04em;
  color: var(--ce-cyan);
}

.page-about .about-hero__facts em {
  font-style: normal;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ce-anno);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--ce-line);
  background: var(--ce-deep-2);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- Section base ---------- */
.page-about .about-section {
  padding: 44px 0 48px;
}

.page-about .about-section__title {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.6vw, 26px);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -.008em;
  color: var(--ce-ink);
}

.page-about .about-section__intro {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ce-ink);
  opacity: .78;
}

.page-about .about-section__more {
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ce-anno);
}

.page-about .about-section__more .ce-link {
  color: var(--ce-cyan);
}

/* ---------- Timeline ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: calc(var(--about-scale-w) / 2);
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(143, 183, 201, 0) 0%, rgba(143, 183, 201, .45) 10%, rgba(143, 183, 201, .45) 90%, rgba(143, 183, 201, 0) 100%);
}

.page-about .about-node {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-scale-w) minmax(0, 1fr);
  gap: 18px;
  padding: 26px 0;
  border-top: 1px solid var(--ce-line);
  transition: background var(--ce-dur) var(--ce-ease);
}

.page-about .about-node:first-child {
  border-top: 0;
  padding-top: 6px;
}

.page-about .about-node__scale {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding-top: 2px;
  font-family: var(--ce-mono);
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--ce-steel);
  transition: color var(--ce-dur) var(--ce-ease);
}

.page-about .about-node__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ce-deep);
  border: 1px solid var(--ce-steel);
  transition: background var(--ce-dur) var(--ce-ease), border-color var(--ce-dur) var(--ce-ease), box-shadow var(--ce-dur) var(--ce-ease);
}

.page-about .about-node__body h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--ce-ink);
  transition: color var(--ce-dur) var(--ce-ease);
}

.page-about .about-node__body p {
  margin: 10px 0 0;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ce-ink);
  opacity: .82;
}

.page-about .about-node__body .ce-note {
  margin-top: 12px;
  opacity: 1;
}

.page-about .about-node:hover {
  background: var(--about-hover);
}

.page-about .about-node:hover .about-node__scale {
  color: var(--ce-cyan);
}

.page-about .about-node:hover .about-node__dot {
  background: var(--ce-cyan);
  border-color: var(--ce-cyan);
  box-shadow: 0 0 0 4px rgba(56, 214, 201, .16);
}

.page-about .about-node:has(.about-node__scale:hover) .about-node__body h3 {
  color: var(--ce-cyan);
}

.page-about .about-node:has(.about-node__body:hover) .about-node__scale {
  color: var(--ce-cyan);
}

.page-about .about-node--tail .about-node__scale {
  color: var(--ce-cyan);
}

.page-about .about-node--tail .about-node__dot {
  background: var(--ce-cyan);
  border-color: var(--ce-cyan);
  box-shadow: 0 0 0 4px rgba(56, 214, 201, .14);
}

/* ---------- Rule rows (two-column definition / explanation) ---------- */
.page-about .about-rule {
  display: grid;
  gap: 12px;
  margin-top: 28px;
  padding: 24px 0;
  border-top: 1px solid var(--ce-line);
  border-bottom: 1px solid var(--ce-line);
}

.page-about .about-rule__label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ce-cyan);
}

.page-about .about-rule__key p {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ce-ink);
}

.page-about .about-rule__body p {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ce-ink);
  opacity: .78;
}

.page-about .about-rule__body p + p {
  margin-top: 12px;
}

/* ---------- Product lines ---------- */
.page-about .about-lines {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .about-line {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 20px 0;
  border-top: 1px solid var(--ce-line);
}

.page-about .about-line:last-child {
  border-bottom: 1px solid var(--ce-line);
}

.page-about .about-line__idx {
  grid-column: 1;
  grid-row: 1;
  font-size: 17px;
  letter-spacing: .04em;
  color: var(--ce-steel);
}

.page-about .about-line__main {
  grid-column: 2;
  grid-row: 1;
}

.page-about .about-line__main h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--ce-ink);
}

.page-about .about-line__main p {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ce-ink);
  opacity: .72;
}

.page-about .about-line__chip {
  grid-column: 2;
  grid-row: 2;
  justify-self: start;
  margin-top: 8px;
}

.page-about .about-line--fold .about-line__idx {
  color: var(--ce-terra);
}

.page-about .about-lines__figure {
  margin: 32px 0 0;
  border: 1px solid var(--ce-line);
  background: var(--ce-deep-2);
  overflow: hidden;
}

.page-about .about-lines__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- Batch definitions ---------- */
.page-about .about-defs {
  margin-top: 6px;
}

.page-about .about-def {
  padding: 22px 0;
  border-bottom: 1px solid var(--ce-line);
  transition: background var(--ce-dur) var(--ce-ease);
}

.page-about .about-def:hover {
  background: var(--about-hover);
}

.page-about .about-def__head {
  display: grid;
  gap: 8px;
}

.page-about .about-def__idx {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ce-steel);
}

.page-about .about-def__head h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--ce-ink);
}

.page-about .about-def__sum {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ce-ink);
  opacity: .74;
}

.page-about .about-def__head .ce-expand {
  justify-self: start;
}

.page-about .about-def__panel {
  margin-top: 14px;
  padding-left: 14px;
  border-left: 1px solid var(--ce-line);
}

.page-about .about-def__panel p {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ce-ink);
  opacity: .82;
}

.page-about .about-def__panel p + p {
  margin-top: 10px;
}

.page-about .about-batch__figure {
  margin: 32px 0 0;
  border: 1px solid var(--ce-line);
  background: var(--ce-deep-2);
  overflow: hidden;
}

.page-about .about-batch__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- Contact ---------- */
.page-about .about-contact {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about .about-contact__list {
  margin: 0;
}

.page-about .about-contact__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid var(--ce-line);
}

.page-about .about-contact__row:last-child {
  border-bottom: 1px solid var(--ce-line);
}

.page-about .about-contact__row dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ce-steel);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ce-ink);
  word-break: break-word;
}

.page-about .about-contact__note p {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ce-ink);
  opacity: .78;
}

.page-about .about-contact__note p + p {
  margin-top: 12px;
}

.page-about .about-contact__note .ce-note {
  opacity: 1;
}

/* ---------- Record / filing ---------- */
.page-about .about-record__grid {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--ce-line);
  border: 1px solid var(--ce-line);
}

.page-about .about-record__item {
  padding: 18px 16px;
  background: var(--ce-deep);
}

.page-about .about-record__key {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ce-steel);
}

.page-about .about-record__val {
  margin: 8px 0 0;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ce-ink);
}

.page-about .about-record__text {
  margin: 24px 0 0;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ce-ink);
  opacity: .8;
}

.page-about .about-record__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-record__rule {
  margin: 34px 0 0;
}

.page-about .about-record__close {
  margin: 20px 0 0;
  max-width: 44em;
}

/* ---------- Tablet ---------- */
@media (min-width: 760px) {
  .page-about {
    --about-scale-w: 76px;
  }

  .page-about .about-hero {
    padding: 40px 0 56px;
  }

  .page-about .about-section {
    padding: 56px 0 60px;
  }

  .page-about .about-line {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    align-items: center;
    gap: 18px;
  }

  .page-about .about-line__idx {
    font-size: 20px;
  }

  .page-about .about-line__chip {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
    margin-top: 0;
  }

  .page-about .about-record__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- Desktop ---------- */
@media (min-width: 1000px) {
  .page-about {
    --about-scale-w: 96px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
    gap: 48px;
  }

  .page-about .about-node {
    grid-template-columns: var(--about-scale-w) minmax(0, 1fr);
    gap: 34px;
    padding: 32px 0;
  }

  .page-about .about-node__scale {
    align-items: flex-start;
    flex-direction: row;
    gap: 14px;
    padding-top: 4px;
  }

  .page-about .about-node__scale .ce-mono {
    font-size: 17px;
  }

  .page-about .about-timeline::before {
    left: 5px;
  }

  .page-about .about-node__body {
    padding-left: 30px;
  }

  .page-about .about-def__head {
    grid-template-columns: 44px minmax(0, 1fr) auto;
    align-items: baseline;
    column-gap: 18px;
  }

  .page-about .about-def__idx {
    grid-column: 1;
  }

  .page-about .about-def__head h3 {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .about-def__sum {
    grid-column: 2;
    grid-row: 2;
  }

  .page-about .about-def__head .ce-expand {
    grid-column: 3;
    grid-row: 1;
    align-self: start;
  }

  .page-about .about-def__panel {
    margin-left: 62px;
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-lines__figure {
    margin-top: 40px;
  }
}

/* ---------- Wide ---------- */
@media (min-width: 1200px) {
  .page-about .about-rule {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    column-gap: 52px;
    align-items: start;
  }

  .page-about .about-rule + .about-rule {
    margin-top: 0;
  }

  .page-about .about-batch__figure {
    margin-top: 40px;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-node__scale,
  .page-about .about-node__dot,
  .page-about .about-node__body h3,
  .page-about .about-def {
    transition: none;
  }
}
<<<END>>>