.page-about {
  --about-rail: 236px;
  --about-line: rgba(29, 27, 22, .14);
  --about-line-strong: rgba(29, 27, 22, .3);
  --about-line-dark: rgba(244, 239, 228, .2);
  background: var(--paper);
  color: var(--text);
}

/* ---------- masthead ---------- */
.page-about .about-masthead {
  position: relative;
  background:
    radial-gradient(115% 95% at 92% -12%, rgba(109, 107, 232, .42), rgba(11, 43, 38, 0) 58%),
    radial-gradient(85% 75% at -6% 104%, rgba(57, 224, 214, .18), rgba(11, 43, 38, 0) 62%),
    var(--ink);
  color: var(--paper);
}

.page-about .about-masthead .breadcrumb {
  padding-top: clamp(18px, 3vw, 28px);
}

.page-about .about-masthead-inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(20px, 3vw, 34px);
  padding-bottom: clamp(38px, 6vw, 76px);
}

.page-about .about-masthead-copy h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -.01em;
  max-width: 16em;
}

.page-about .about-masthead-copy .lede {
  margin-top: 18px;
  max-width: 52ch;
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.8;
}

.page-about .about-meta {
  margin: 26px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--about-line-dark);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(244, 239, 228, .68);
  max-width: 100%;
  word-break: break-word;
}

.page-about .about-masthead-visual {
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.page-about .about-glyph {
  display: block;
  width: 100%;
  max-width: 440px;
  height: auto;
}

/* ---------- .page-about layout ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
  padding-block: clamp(38px, 7vw, 88px);
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- rail ---------- */
.page-about .about-rail {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.page-about .about-rail-title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mist);
}

.page-about .about-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1px;
  border-left: 1px solid var(--about-line);
}

.page-about .about-rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-left: -1px;
  padding: 9px 0 9px 14px;
  border-left: 2px solid transparent;
  font-size: 15px;
  line-height: 1.4;
  color: var(--text);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-rail-link .mono {
  font-size: 12px;
  color: var(--gold);
  letter-spacing: .04em;
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(57, 224, 214, .08);
  color: var(--ink);
}

.page-about .about-rail-note {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(29, 27, 22, .62);
  padding-left: 14px;
}

.page-about .about-rail-note a {
  color: var(--ink-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- blocks ---------- */
.page-about .about-block {
  padding-block: clamp(30px, 5vw, 56px);
  border-top: 1px solid var(--about-line);
}

.page-about .about-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-block:last-child {
  padding-bottom: 0;
}

.page-about .about-block h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -.005em;
  max-width: 24em;
}

.page-about .about-intro {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.85;
  color: rgba(29, 27, 22, .82);
}

.page-about .about-note {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(29, 27, 22, .66);
}

.page-about .about-block .cluster {
  margin-top: 24px;
}

/* ---------- figures ---------- */
.page-about .about-figure {
  margin: clamp(20px, 3.5vw, 34px) 0;
}

.page-about .about-figure--tight {
  margin: 0;
}

.page-about .media-frame {
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid var(--about-line);
  background: var(--paper-2);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-caption {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- timeline ---------- */
.page-about .tl {
  position: relative;
  list-style: none;
  margin: clamp(22px, 4vw, 38px) 0 0;
  padding: 0;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(to bottom, var(--gold), rgba(57, 224, 214, .85) 55%, rgba(29, 27, 22, .12));
}

.page-about .tl-item {
  position: relative;
  padding-left: 34px;
  padding-bottom: clamp(20px, 3vw, 30px);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--gold);
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .tl-item:nth-child(3)::before {
  border-color: var(--cyan);
}

.page-about .tl-item:nth-child(4)::before {
  border-color: var(--violet);
}

.page-about .tl-item:hover::before {
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(216, 166, 87, .16);
}

.page-about .tl-item:nth-child(3):hover::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(57, 224, 214, .16);
}

.page-about .tl-stage {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .tl-title {
  margin: 6px 0 0;
  font-size: clamp(18px, 2.4vw, 21px);
  line-height: 1.35;
  font-weight: 700;
}

.page-about .tl-text {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(29, 27, 22, .78);
}

/* ---------- crew accordion ---------- */
.page-about .about-crew {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(20px, 3.5vw, 32px);
  align-items: start;
}

.page-about .about-crew-card {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--about-line);
  border-radius: var(--r-md);
  background: var(--paper-2);
  min-width: 0;
}

.page-about .about-crew-card--edit {
  border-color: rgba(216, 166, 87, .45);
  background: linear-gradient(158deg, rgba(216, 166, 87, .2), rgba(244, 239, 228, 0) 74%);
}

.page-about .about-crew-card--calib {
  border-color: rgba(57, 224, 214, .42);
  background: linear-gradient(158deg, rgba(57, 224, 214, .18), rgba(244, 239, 228, 0) 74%);
}

.page-about .about-crew-card--support {
  border-color: rgba(109, 107, 232, .38);
  background: linear-gradient(158deg, rgba(109, 107, 232, .16), rgba(244, 239, 228, 0) 74%);
}

.page-about .about-crew .accordion-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.page-about .about-crew-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.35;
  font-weight: 700;
}

.page-about .about-crew-num {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-2);
  padding: 2px 7px;
  border: 1px solid var(--about-line-strong);
  border-radius: var(--r-pill);
}

.page-about .about-crew .accordion-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--about-line-strong);
  border-radius: var(--r-pill);
  background: transparent;
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.4;
  color: var(--text);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-crew .accordion-trigger:hover,
.page-about .about-crew .accordion-trigger:focus-visible {
  border-color: var(--cyan);
  background: rgba(57, 224, 214, .14);
}

.page-about .about-crew .accordion-trigger[aria-expanded="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-about .about-crew-lead {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(29, 27, 22, .78);
  max-width: 34ch;
}

.page-about .about-crew .accordion-body {
  padding-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(29, 27, 22, .8);
}

.page-about .about-crew .accordion-body ul {
  margin: 0;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* ---------- data band ---------- */
.page-about .data-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(22px, 3.5vw, 34px);
  background: var(--about-line);
  border-block: 1px solid var(--about-line);
}

.page-about .data-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 3vw, 26px) clamp(14px, 2.4vw, 22px);
  background: var(--paper-2);
  min-width: 0;
}

.page-about .data-cell:nth-child(2) {
  background: rgba(57, 224, 214, .1);
}

.page-about .data-cell:nth-child(3) {
  background: rgba(216, 166, 87, .14);
}

.page-about .data-num {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
  word-break: break-word;
}

.page-about .data-num em {
  font-style: normal;
  font-size: .52em;
  vertical-align: super;
  margin-left: 2px;
  color: var(--gold);
}

.page-about .data-label {
  font-size: 13px;
  line-height: 1.55;
  color: rgba(29, 27, 22, .7);
}

/* ---------- quality ---------- */
.page-about .about-quality {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 38px);
  margin-top: clamp(22px, 3.5vw, 34px);
  align-items: start;
}

.page-about .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .checklist li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--about-line);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(29, 27, 22, .8);
}

.page-about .checklist li:first-child {
  padding-top: 0;
}

.page-about .checklist li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 10px;
  border-radius: 2px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .checklist li:nth-child(even)::before {
  background: var(--gold);
}

/* ---------- contact ---------- */
.page-about .about-block--contact {
  background:
    linear-gradient(180deg, rgba(57, 224, 214, .07), rgba(244, 239, 228, 0) 60%);
}

.page-about .about-contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(22px, 3.5vw, 32px);
}

.page-about .about-contact-card {
  padding: clamp(16px, 2.6vw, 24px);
  min-width: 0;
}

.page-about .about-contact-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-contact-value {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.6;
  font-weight: 500;
  color: var(--ink);
  word-break: break-word;
}

.page-about .about-copy {
  display: inline-flex;
  align-items: center;
  margin-top: 12px;
  padding: 5px 12px;
  border: 1px solid var(--about-line-strong);
  border-radius: var(--r-pill);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--ink);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-copy:hover,
.page-about .about-copy:focus-visible {
  border-color: var(--cyan);
  background: rgba(57, 224, 214, .14);
}

.page-about .about-contact-note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(29, 27, 22, .62);
}

.page-about .about-legal {
  margin: 26px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-line);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
  word-break: break-word;
}

/* ---------- responsive ---------- */
@media (min-width: 720px) {
  .page-about .data-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 820px) {
  .page-about .about-crew {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 18px;
  }

  .page-about .about-crew .accordion-item:nth-child(2) {
    margin-top: clamp(0px, 3vw, 34px);
  }

  .page-about .about-crew .accordion-item:nth-child(3) {
    grid-column: 1 / -1;
    width: min(100%, 640px);
  }

  .page-about .about-quality {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-masthead-inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-about .about-masthead-visual {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (max-width: 599px) {
  .page-about .about-masthead-copy h1 {
    font-size: 30px;
  }

  .page-about .about-block h2 {
    font-size: 24px;
  }

  .page-about .about-crew .accordion-heading {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-about .about-block .cluster .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail-link,
  .page-about .about-crew .accordion-trigger,
  .page-about .about-copy,
  .page-about .tl-item::before {
    transition: none;
  }
}
<<<END>>>