.page-about {
  --about-axis-w: 236px;
  --about-card-shadow: 6px 6px 0 var(--line);
}

.page-about .about-crumb-wrap {
  padding-block: 20px 4px;
}

/* ---------- Hero ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(28px, 5vw, 56px) clamp(48px, 7vw, 88px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero-copy .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  font-family: var(--sans);
  font-weight: 900;
  font-size: var(--h1);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 clamp(16px, 2vw, 24px);
  max-width: 15em;
}

.page-about .about-hero .lede {
  font-size: clamp(16px, 1.2vw, 18px);
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 34em;
  margin: 0 0 clamp(24px, 3vw, 36px);
}

.page-about .about-hero-stats {
  list-style: none;
  margin: 0 0 clamp(24px, 3vw, 34px);
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero-stats li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero-stats li:last-child {
  border-bottom: 0;
}

.page-about .stat-key {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
  min-width: 76px;
}

.page-about .stat-num {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--orange);
  line-height: 1;
}

.page-about .stat-unit {
  font-size: 13px;
  color: var(--gray);
}

.page-about .about-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

/* Hero mark */

.page-about .about-hero-mark {
  position: relative;
  min-height: 240px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(5, 1fr);
  gap: 6px;
}

.page-about .mark-block {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .mark-forest {
  grid-column: 1 / 5;
  grid-row: 1 / 3;
  background: var(--forest);
  clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
}

.page-about .mark-ice {
  grid-column: 3 / 7;
  grid-row: 3 / 4;
  background: var(--ice);
  clip-path: polygon(6% 0, 100% 0, 94% 100%, 0 100%);
}

.page-about .mark-orange {
  grid-column: 2 / 6;
  grid-row: 4 / 6;
  background: var(--orange);
  clip-path: polygon(0 0, 94% 0, 100% 100%, 8% 100%);
}

.page-about .mark-tag {
  grid-column: 5 / 7;
  grid-row: 1 / 2;
  align-self: center;
  justify-self: end;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--forest);
  border: 1px solid var(--forest);
  padding: 4px 8px;
  background: var(--paper);
}

.page-about .mark-tag-alt {
  grid-column: 1 / 3;
  grid-row: 3 / 4;
  justify-self: start;
  align-self: center;
  color: var(--ice-deep);
  border-color: var(--ice-deep);
}

/* ---------- Section base ---------- */

.page-about .section {
  padding-block: clamp(48px, 7vw, 96px);
}

.page-about .section-head {
  max-width: 46em;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .section-head .eyebrow {
  margin-bottom: 12px;
}

.page-about a {
  color: var(--ice-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-about a:hover {
  color: var(--orange-deep);
}

/* ---------- Why ---------- */

.page-about .about-why {
  background: var(--forest);
  color: var(--forest-ink);
}

.page-about .about-why-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-why-copy .eyebrow-invert {
  color: var(--gold);
}

.page-about .about-why-copy h2 {
  font-family: var(--sans);
  font-weight: 900;
  font-size: var(--h2);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0 0 clamp(18px, 2vw, 26px);
}

.page-about .about-why-copy p {
  color: var(--forest-ink);
  line-height: 1.8;
  margin: 0 0 18px;
  max-width: 40em;
}

.page-about .about-why-copy p:last-child {
  margin-bottom: 0;
}

.page-about .about-why-quote {
  margin: 0;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--gold);
  background: var(--forest-deep);
  align-self: start;
}

.page-about .about-why-quote p {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.4;
  color: var(--paper);
  margin: 0 0 12px;
}

.page-about .about-why-quote cite {
  font-family: var(--mono);
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

/* ---------- Stages ---------- */

.page-about .stage-layout {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .stage-axis-wrap {
  order: -1;
}

.page-about .stage-axis {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .axis-item {
  flex: 0 0 auto;
}

.page-about .axis-item a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--paper);
  text-decoration: none;
  color: var(--ink);
  white-space: nowrap;
}

.page-about .axis-item a:hover {
  border-color: var(--orange);
  color: var(--orange-deep);
}

.page-about .axis-no {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gray);
}

.page-about .axis-name {
  font-size: 14px;
  font-weight: 600;
}

.page-about .axis-bar {
  display: block;
  width: 26px;
  height: 6px;
}

.page-about .axis-item:nth-child(1) .axis-bar {
  background: var(--line);
}

.page-about .axis-item:nth-child(2) .axis-bar {
  background: var(--ice);
}

.page-about .axis-item:nth-child(3) .axis-bar {
  background: var(--gold);
}

.page-about .axis-item:nth-child(4) .axis-bar {
  background: var(--orange);
}

.page-about .stage-stream {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .stage-card {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: var(--about-card-shadow);
  scroll-margin-top: 120px;
}

.page-about .stage-card-current {
  border-color: var(--orange);
  background: var(--orange-soft);
  box-shadow: 6px 6px 0 var(--orange);
}

.page-about .stage-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.page-about .stage-head .index-no {
  color: var(--orange-deep);
}

.page-about .stage-head h3 {
  font-family: var(--sans);
  font-weight: 800;
  font-size: var(--h3);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}

.page-about .stage-kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ice-deep);
  margin: 0 0 12px;
}

.page-about .stage-card p {
  line-height: 1.78;
  color: var(--ink-soft);
  margin: 0 0 12px;
}

.page-about .stage-card p:last-child {
  margin-bottom: 0;
}

.page-about .stage-note {
  font-size: 14px;
  color: var(--gray);
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}

.page-about .stage-note a {
  font-weight: 600;
}

/* ---------- Team ---------- */

.page-about .about-team {
  background: var(--paper-2);
}

.page-about .team-grid {
  display: grid;
  gap: 16px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .team-item {
  border: 1px solid var(--ink);
  background: var(--paper);
  box-shadow: 5px 5px 0 var(--line);
}

.page-about .team-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid transparent;
}

.page-about .team-item summary::-webkit-details-marker {
  display: none;
}

.page-about .team-item[open] summary {
  border-bottom-color: var(--line);
}

.page-about .team-item summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 16px;
  color: var(--orange);
}

.page-about .team-item[open] summary::after {
  content: "－";
}

.page-about .team-name {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 18px;
  color: var(--ink);
}

.page-about .team-count {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ice-deep);
  border: 1px solid var(--ice);
  padding: 2px 8px;
  background: var(--ice-soft);
}

.page-about .team-body {
  padding: 16px 18px 18px;
}

.page-about .team-body p {
  line-height: 1.75;
  color: var(--ink-soft);
  margin: 0 0 10px;
}

.page-about .team-handoff {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--gray);
  border-left: 3px solid var(--gold);
  padding-left: 12px;
}

.page-about .about-team-figure {
  margin: 0 0 clamp(20px, 3vw, 28px);
}

.page-about .about-team-tail {
  font-size: 15px;
  color: var(--gray);
  margin: 0;
}

.page-about .about-team-tail a {
  font-weight: 600;
}

/* ---------- Maintenance ---------- */

.page-about .about-maint-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .maint-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: maint;
}

.page-about .maint-step {
  position: relative;
  padding: 20px 0 20px 20px;
  border-left: 1px solid var(--line);
}

.page-about .maint-step:last-child {
  border-left-color: var(--orange);
}

.page-about .maint-step::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 26px;
  width: 9px;
  height: 9px;
  background: var(--paper);
  border: 1px solid var(--orange);
}

.page-about .maint-step:last-child::before {
  background: var(--orange);
}

.page-about .maint-step h3 {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 20px;
  margin: 0 0 8px;
  color: var(--ink);
}

.page-about .maint-step h3 .index-no {
  margin-right: 8px;
  color: var(--gray);
}

.page-about .maint-step p {
  margin: 0;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 40em;
}

.page-about .about-maint-panel {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .maint-ops {
  display: grid;
  gap: 0;
  border: 1px solid var(--ink);
  background: var(--paper);
}

.page-about .op-item {
  display: grid;
  gap: 4px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}

.page-about .op-item:last-child {
  border-bottom: 0;
}

.page-about .op-key {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-about .op-val {
  font-size: 16px;
  color: var(--ink);
  line-height: 1.6;
}

/* ---------- Coverage ---------- */

.page-about .about-cover {
  background: var(--ice-soft);
}

.page-about .cover-grid {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-about .cover-copy .eyebrow-ice {
  color: var(--ice-deep);
}

.page-about .cover-copy h2 {
  font-family: var(--sans);
  font-weight: 900;
  font-size: var(--h2);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 clamp(16px, 2vw, 24px);
}

.page-about .cover-copy p {
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 16px;
  max-width: 38em;
}

.page-about .cover-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .cover-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 15px;
  color: var(--ink-soft);
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(46, 107, 122, 0.22);
}

.page-about .cover-num {
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--ice-deep);
  line-height: 1;
}

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

/* ---------- Cooperation ---------- */

.page-about .coop-grid {
  display: grid;
  gap: 16px;
}

.page-about .coop-card {
  display: block;
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--ink);
  background: var(--paper);
  text-decoration: none;
  color: var(--ink);
  box-shadow: 5px 5px 0 var(--line);
  transition: box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .coop-card:hover {
  border-color: var(--orange);
  box-shadow: 6px 6px 0 var(--orange);
  transform: translate(-2px, -2px);
  color: var(--ink);
}

.page-about .coop-card h3 {
  font-family: var(--sans);
  font-weight: 800;
  font-size: var(--h3);
  margin: 10px 0 12px;
  color: var(--ink);
}

.page-about .coop-card p {
  margin: 0 0 16px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .coop-go {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--orange-deep);
}

.page-about .coop-cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 32px);
  background: var(--orange-soft);
  border-left: 4px solid var(--orange);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.page-about .coop-cta p {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  max-width: 42em;
}

/* ---------- Media frames ---------- */

.page-about .media-frame {
  display: block;
  border: 1px solid var(--ink);
  background: var(--paper);
  padding: 8px;
}

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

.page-about .figure-caption {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--gray);
  padding: 10px 4px 2px;
  line-height: 1.6;
}

/* ---------- Responsive ---------- */

@media (min-width: 640px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: 0;
  }

  .page-about .about-hero-stats li {
    flex-direction: column;
    gap: 6px;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    padding: 14px 14px 14px 0;
  }

  .page-about .about-hero-stats li:last-child {
    border-right: 0;
  }

  .page-about .maint-ops {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .op-item:nth-child(odd) {
    border-right: 1px solid var(--line);
  }

  .page-about .op-item:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .page-about .coop-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-about .about-hero-mark {
    min-height: 380px;
  }

  .page-about .about-why-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-maint-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

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

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

@media (min-width: 960px) {
  .page-about .stage-layout {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .stage-axis-wrap {
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-about .stage-axis {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .axis-item a {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    column-gap: 12px;
    row-gap: 6px;
    align-items: center;
    border: 0;
    background: transparent;
    padding: 14px 0 14px 16px;
    position: relative;
  }

  .page-about .axis-item a::before {
    content: "";
    position: absolute;
    left: -4px;
    top: 20px;
    width: 7px;
    height: 7px;
    background: var(--paper);
    border: 1px solid var(--gray);
  }

  .page-about .axis-item:nth-child(4) a::before {
    background: var(--orange);
    border-color: var(--orange);
  }

  .page-about .axis-no {
    grid-row: 1;
    grid-column: 1;
  }

  .page-about .axis-name {
    grid-row: 1;
    grid-column: 2;
    font-size: 16px;
  }

  .page-about .axis-bar {
    grid-row: 2;
    grid-column: 1 / 3;
    width: 100%;
    height: 4px;
  }

  .page-about .about-team-figure {
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-about .stage-layout {
    --about-axis-w: 260px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .coop-card {
    transition: none;
  }

  .page-about .coop-card:hover {
    transform: none;
  }
}