.page-about {
  --about-border: 1px solid var(--guo-line);
  --about-pad: 48px;
  --about-sticky: calc(var(--bar-h) + 24px);
}

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

.page-about .about-hero {
  position: relative;
  padding: 32px 0 44px;
  border-bottom: var(--about-border);
  overflow: hidden;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  padding: 5px 10px;
  background: var(--guo-yellow);
  color: var(--guo-ink);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.page-about .about-hero__kicker .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-about .about-hero__title {
  margin: 0 0 30px;
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(36px, 10.2vw, 92px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--guo-ink);
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  font-weight: 900;
  color: var(--guo-orange);
}

.page-about .about-hero__split {
  display: grid;
  gap: 28px;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.78;
  color: var(--guo-ink);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: var(--about-border);
  border-left: var(--about-border);
}

.page-about .about-hero__facts li {
  padding: 14px 12px 14px 14px;
  border-right: var(--about-border);
  border-bottom: var(--about-border);
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 6.4vw, 30px);
  font-weight: 500;
  line-height: 1.1;
  color: var(--guo-orange-deep);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--guo-ink-green);
  opacity: 0.78;
}

.page-about .section-head {
  margin-bottom: 28px;
}

.page-about .about-who,
.page-about .about-roles,
.page-about .about-versions,
.page-about .about-reach,
.page-about .about-rhythm {
  padding: var(--about-pad) 0;
}

.page-about .about-who__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-border);
}

.page-about .who-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 6px;
  padding: 22px 0;
  border-bottom: var(--about-border);
}

.page-about .who-row__no {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--guo-orange);
}

.page-about .who-row__title {
  grid-column: 2;
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--guo-ink);
}

.page-about .who-row__text {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--guo-ink);
  opacity: 0.86;
}

.page-about .about-who__result {
  margin: 24px 0 0;
  padding: 14px 16px;
  background: var(--guo-cream-deep);
  border-left: 4px solid var(--guo-orange);
  font-size: 15px;
  line-height: 1.7;
  color: var(--guo-ink);
}

.page-about .about-who__result .mono {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--guo-ink-green);
}

.page-about .about-roles__layout {
  display: grid;
  gap: 28px;
}

.page-about .about-roles__index-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--guo-ink-green);
  opacity: 0.7;
}

.page-about .about-roles__index ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--guo-line);
  border: var(--about-border);
}

.page-about .about-roles__index a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 12px;
  background: var(--guo-cream);
  font-size: 14px;
  color: var(--guo-ink);
  text-decoration: none;
  transition: background-color 160ms ease-out, color 160ms ease-out;
}

.page-about .about-roles__index a .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--guo-orange);
}

.page-about .about-roles__index a:hover,
.page-about .about-roles__index a:focus-visible {
  background: var(--guo-orange);
  color: var(--guo-cream);
}

.page-about .about-roles__index a:hover .mono,
.page-about .about-roles__index a:focus-visible .mono {
  color: var(--guo-cream);
}

.page-about .about-roles__cards {
  display: grid;
  gap: 18px;
}

.page-about .role-card {
  position: relative;
  padding: 22px 18px 20px;
  background: var(--guo-cream-deep);
  border: var(--about-border);
  transition: border-color 160ms ease-out, background-color 160ms ease-out;
}

.page-about .role-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 44px;
  height: 4px;
  background: var(--guo-orange);
}

.page-about .role-card:hover,
.page-about .role-card:focus-within {
  border-color: var(--guo-orange);
  background: var(--guo-cream);
}

.page-about .role-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .role-card__no,
.page-about .role-card__count {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--guo-ink-green);
}

.page-about .role-card__count {
  color: var(--guo-orange-deep);
}

.page-about .role-card__title {
  margin: 12px 0 8px;
  font-size: 21px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--guo-ink);
}

.page-about .role-card__duty {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--guo-ink);
  opacity: 0.86;
}

.page-about .role-card__week {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 200ms ease, opacity 160ms ease-out;
}

.page-about .role-card:hover .role-card__week,
.page-about .role-card:focus-within .role-card__week {
  max-height: 220px;
  opacity: 1;
}

.page-about .role-card__week-title {
  margin: 14px 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--guo-teal);
}

.page-about .role-card__week ul {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  border-top: 1px dashed var(--guo-line);
}

.page-about .role-card__week li {
  padding: 7px 0 7px 14px;
  position: relative;
  font-size: 14px;
  line-height: 1.6;
  color: var(--guo-ink);
}

.page-about .role-card__week li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  background: var(--guo-teal);
}

.page-about .about-roles__media {
  margin: 28px 0 0;
  border-left: 4px solid var(--guo-teal);
}

.page-about .about-maint {
  padding: var(--about-pad) 0;
  background: var(--guo-ink-green);
  color: var(--guo-cream);
}

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

.page-about .about-maint__num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--guo-yellow);
}

.page-about .about-maint__title {
  margin: 0 0 14px;
  font-size: clamp(26px, 7vw, 42px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--guo-cream);
}

.page-about .about-maint__text {
  margin: 0;
  max-width: 33em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--guo-cream);
  opacity: 0.86;
}

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

.page-about .about-maint__fig img {
  width: 100%;
  border: 1px solid rgba(251, 243, 230, 0.28);
}

.page-about .about-maint__fig figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--guo-teal-soft);
}

.page-about .about-maint__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-maint__points li {
  padding: 16px 0 0;
  border-top: 1px solid rgba(251, 243, 230, 0.26);
}

.page-about .about-maint__point-no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--guo-yellow);
}

.page-about .about-maint__points p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--guo-cream);
  opacity: 0.9;
}

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

.page-about .about-versions__fig {
  margin: 0 0 20px;
  border: var(--about-border);
}

.page-about .ladder {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: end;
  gap: 5px;
}

.page-about .ladder__step {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 8px 2px 6px;
  background: var(--guo-cream-deep);
  border: var(--about-border);
  border-bottom: 3px solid var(--guo-orange);
  text-decoration: none;
  color: var(--guo-ink);
  transition: background-color 160ms ease-out, color 160ms ease-out, border-color 160ms ease-out;
}

.page-about .ladder__step .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.page-about .ladder__step:hover,
.page-about .ladder__step:focus-visible {
  background: var(--guo-orange);
  border-bottom-color: var(--guo-orange-deep);
  color: var(--guo-cream);
}

.page-about .ladder__step--1 { height: 46px; }
.page-about .ladder__step--2 { height: 56px; }
.page-about .ladder__step--3 { height: 66px; }
.page-about .ladder__step--4 { height: 76px; }
.page-about .ladder__step--5 {
  height: 88px;
  background: var(--guo-ink-green);
  border-color: var(--guo-ink-green);
  border-bottom-color: var(--guo-yellow);
  color: var(--guo-cream);
}

.page-about .ver-notes {
  border-bottom: var(--about-border);
}

.page-about .ver-note {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  column-gap: 16px;
  row-gap: 6px;
  padding: 20px 12px 20px 0;
  border-top: var(--about-border);
  scroll-margin-top: var(--about-sticky);
  transition: background-color 160ms ease-out, box-shadow 160ms ease-out;
}

.page-about .ver-note:hover {
  background: var(--guo-cream-deep);
}

.page-about .ver-note:target {
  background: var(--guo-cream-deep);
  box-shadow: inset 4px 0 0 var(--guo-teal);
  padding-left: 12px;
}

.page-about .ver-note__tag {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--guo-orange-deep);
}

.page-about .ver-note__title {
  grid-column: 2;
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--guo-ink);
}

.page-about .ver-note__text {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--guo-ink);
  opacity: 0.86;
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--guo-line);
  border: var(--about-border);
}

.page-about .reach-cell {
  padding: 20px 16px 22px;
  background: var(--guo-cream);
}

.page-about .reach-cell:nth-child(odd) {
  background: var(--guo-cream-deep);
}

.page-about .reach-cell__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 7vw, 38px);
  font-weight: 500;
  line-height: 1.05;
  color: var(--guo-teal);
}

.page-about .reach-cell:nth-child(4n + 1) .reach-cell__num,
.page-about .reach-cell:nth-child(4n) .reach-cell__num {
  color: var(--guo-orange);
}

.page-about .reach-cell__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--guo-ink);
  opacity: 0.84;
}

.page-about .about-reach__note {
  margin: 22px 0 0;
  max-width: 38em;
  padding-left: 14px;
  border-left: 3px solid var(--guo-teal-soft);
  font-size: 15px;
  line-height: 1.75;
  color: var(--guo-ink);
  opacity: 0.86;
}

.page-about .rhythm-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-border);
}

.page-about .rhythm-item {
  display: grid;
  gap: 6px;
  padding: 20px 0 20px 16px;
  border-bottom: var(--about-border);
  position: relative;
}

.page-about .rhythm-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 7px;
  height: 7px;
  background: var(--guo-yellow);
}

.page-about .rhythm-item__when {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--guo-orange-deep);
}

.page-about .rhythm-item__what {
  font-size: 17px;
  font-weight: 700;
  color: var(--guo-ink);
}

.page-about .rhythm-item__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--guo-ink);
  opacity: 0.86;
}

.page-about .about-cta {
  padding: var(--about-pad) 0;
  background: var(--guo-ink-green);
  color: var(--guo-cream);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 32px;
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  font-size: clamp(24px, 6.4vw, 38px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--guo-cream);
}

.page-about .about-cta__text {
  margin: 0 0 22px;
  max-width: 30em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--guo-cream);
  opacity: 0.86;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__links {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--guo-cream);
  opacity: 0.82;
}

.page-about .about-cta__links a {
  color: var(--guo-teal-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-cta__links a:hover {
  color: var(--guo-yellow);
}

.page-about .about-cta__side {
  padding: 20px 18px 22px;
  border: 1px solid rgba(251, 243, 230, 0.32);
}

.page-about .about-cta__side-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--guo-yellow);
}

.page-about .about-cta__copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(251, 243, 230, 0.28);
}

.page-about .about-cta__email {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--guo-cream);
  overflow-wrap: anywhere;
}

.page-about .copy-btn {
  appearance: none;
  border: 1px dashed var(--guo-teal-soft);
  background: transparent;
  color: var(--guo-cream);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 6px 10px;
  cursor: pointer;
  transition: background-color 160ms ease-out, border-color 160ms ease-out, color 160ms ease-out;
}

.page-about .copy-btn:hover,
.page-about .copy-btn:focus-visible {
  background: rgba(127, 212, 184, 0.18);
  border-color: var(--guo-teal);
}

.page-about .copy-btn[data-copy-state="copied"] {
  border-color: var(--guo-yellow);
  color: var(--guo-yellow);
}

.page-about .about-cta__hint {
  margin: 14px 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--guo-cream);
  opacity: 0.82;
}

.page-about .about-cta__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .copy-btn--tag {
  border-style: solid;
  border-color: rgba(251, 243, 230, 0.4);
  font-family: var(--font-mono);
}

@media (hover: none) {
  .page-about .role-card__week {
    max-height: none;
    opacity: 1;
  }
}

@media (min-width: 720px) {
  .page-about .about-roles__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .role-card:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .role-card:nth-child(3) {
    margin-top: 0;
  }

  .page-about .role-card:nth-child(4) {
    margin-top: 34px;
  }

  .page-about .about-maint__points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-reach__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .rhythm-item {
    grid-template-columns: 150px 180px minmax(0, 1fr);
    column-gap: 24px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-pad: 64px;
  }

  .page-about .about-hero {
    padding: 44px 0 60px;
  }

  .page-about .about-hero__split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-roles__layout {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-roles__index {
    position: sticky;
    top: var(--about-sticky);
  }

  .page-about .about-roles__index ul {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-roles__media {
    margin-top: 36px;
  }

  .page-about .about-maint__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .about-maint__head {
    max-width: 40em;
  }

  .page-about .about-versions__split {
    grid-template-columns: 340px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-versions__side {
    position: sticky;
    top: var(--about-sticky);
  }

  .page-about .who-row {
    grid-template-columns: 52px minmax(0, 1fr);
    column-gap: 24px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__title {
    font-size: clamp(72px, 7.4vw, 96px);
  }

  .page-about .about-maint__inner {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    column-gap: 48px;
  }

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

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

  .page-about .about-maint__points {
    grid-column: 1 / -1;
    margin-top: 8px;
  }
}
<<<END>>>