.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.5vw, 44px) 0 clamp(44px, 7vw, 88px);
  background:
    radial-gradient(120% 90% at 86% -12%, rgba(200, 162, 74, 0.15), transparent 62%),
    linear-gradient(180deg, var(--ink-0) 0%, var(--ink-1) 100%);
  border-bottom: 2px solid var(--line);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--gold-08) 1px, transparent 1px),
    linear-gradient(to bottom, var(--gold-08) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: linear-gradient(180deg, #000 6%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 6%, transparent 88%);
}

.page-about .ab-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3.4vw, 36px);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
}

.page-about .ab-hero__lead {
  min-width: 0;
}

.page-about .ab-hero h1 {
  margin: 14px 0 0;
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 74px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .ab-hero h1 em {
  display: inline-block;
  font-style: normal;
  color: var(--gold-bright);
  border-bottom: 4px solid var(--gold-32);
}

.page-about .ab-hero__intro {
  margin: 20px 0 0;
  max-width: 60ch;
  font-family: var(--serif);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--mist);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-hero__index {
  min-width: 0;
  background: var(--ink-2);
  border: 2px solid var(--line);
  border-top: 3px solid var(--gold);
  box-shadow: 8px 8px 0 var(--gold-16);
  padding: 18px 18px 22px;
}

.page-about .ab-hero__index-title {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .ab-index {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .ab-index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 6px;
  border-bottom: 1px dashed var(--line);
  color: var(--paper);
  text-decoration: none;
  font-family: var(--sans);
  font-size: 14px;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .ab-index li:last-child a {
  border-bottom: 0;
}

.page-about .ab-index a .mono {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .ab-index a:hover,
.page-about .ab-index a:focus-visible {
  color: var(--gold-bright);
  background: var(--gold-08);
  padding-left: 12px;
}

.page-about .ab-sec {
  position: relative;
  padding: clamp(44px, 6.4vw, 84px) 0;
  border-bottom: 1px solid var(--line-soft);
  background: var(--ink-0);
}

.page-about .ab-sec--tint {
  background:
    linear-gradient(180deg, var(--ink-1) 0%, var(--ink-0) 100%);
}

.page-about .ab-sec__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .ab-sec__marker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .ab-sec__marker::after {
  content: "";
  width: 44px;
  height: 2px;
  background: var(--line);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-sec.is-current .ab-sec__marker {
  color: var(--gold-bright);
}

.page-about .ab-sec.is-current .ab-sec__marker::after {
  background: var(--gold);
  box-shadow: 0 0 12px var(--gold-32);
}

.page-about .ab-sec__body {
  min-width: 0;
}

.page-about .ab-sec h2 {
  margin: 10px 0 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .ab-sec h3 {
  margin: 0 0 8px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(16px, 1.9vw, 18.5px);
  line-height: 1.42;
  color: var(--paper);
}

.page-about .ab-sec__body .prose {
  margin-top: 16px;
  color: var(--mist);
}

.page-about .ab-sec__body p {
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.9;
}

.page-about .media-frame {
  margin: clamp(22px, 3vw, 32px) 0;
}

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

.page-about .ab-dual {
  position: relative;
  margin-top: 28px;
  background: var(--ink-2);
  border: 2px solid var(--line);
}

.page-about .ab-dual__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .ab-dual:focus-within .ab-dual__tabs {
  box-shadow: inset 0 0 0 2px var(--teal);
}

.page-about .ab-dual__tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--line);
}

.page-about .ab-dual__tab {
  flex: 1 1 150px;
  padding: 13px 15px;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--mist);
  border-right: 1px solid var(--line);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-dual__tab:last-child {
  border-right: 0;
}

.page-about .ab-dual__tab:hover {
  background: var(--gold-08);
  color: var(--paper);
}

.page-about .ab-dual__panel {
  display: none;
  padding: 20px 18px 24px;
}

.page-about .ab-dual__panel p {
  margin: 0;
  color: var(--mist);
}

.page-about #ab-dual-1:checked ~ .ab-dual__tabs .ab-dual__tab[for="ab-dual-1"],
.page-about #ab-dual-2:checked ~ .ab-dual__tabs .ab-dual__tab[for="ab-dual-2"] {
  background: var(--gold-16);
  color: var(--gold-bright);
  box-shadow: inset 0 -3px 0 var(--gold);
}

.page-about #ab-dual-1:checked ~ .ab-dual__panels .ab-dual__panel--a,
.page-about #ab-dual-2:checked ~ .ab-dual__panels .ab-dual__panel--b {
  display: block;
}

.page-about .ab-zones {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-zone {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--ink-2);
  border: 2px solid var(--line);
  border-top: 3px solid var(--gold);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-zone:hover {
  transform: translateY(-3px);
  border-color: var(--gold-32);
  border-top-color: var(--gold-bright);
  box-shadow: 6px 6px 0 var(--gold-08);
}

.page-about .ab-zone__num {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--rose);
}

.page-about .ab-zone p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .ab-zone__meta {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.page-about .ab-benefits {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-benefit {
  padding: 18px 18px 22px;
  background: var(--ink-2);
  border: 2px solid var(--line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-benefit:hover {
  transform: translateY(-3px);
  border-color: var(--gold-32);
}

.page-about .ab-benefit .tag {
  display: inline-block;
  margin-bottom: 12px;
}

.page-about .ab-benefit p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .ab-rhythm {
  list-style: none;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-left: 2px solid var(--line);
}

.page-about .ab-rhythm__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0 20px 22px;
  border-bottom: 1px dashed var(--line);
}

.page-about .ab-rhythm__item:last-child {
  border-bottom: 0;
}

.page-about .ab-rhythm__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 28px;
  width: 12px;
  height: 12px;
  background: var(--ink-0);
  border: 2px solid var(--gold);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-rhythm__item:hover::before {
  background: var(--gold);
  box-shadow: 0 0 12px var(--gold-32);
}

.page-about .ab-rhythm__key {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .ab-rhythm__text h3 {
  margin-bottom: 6px;
}

.page-about .ab-rhythm__text p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.88;
}

.page-about .ab-principles {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 2px solid var(--line);
}

.page-about .ab-principle {
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-principle__num {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--teal);
}

.page-about .ab-principle p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.88;
}

.page-about .ab-team {
  margin-top: 28px;
  padding: 20px 20px 24px;
  background: var(--gold-08);
  border: 2px solid var(--line);
  border-left: 4px solid var(--gold);
}

.page-about .ab-team p {
  margin: 0;
  color: var(--mist);
}

.page-about .ab-swatch {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.page-about .ab-swatch__item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  background: var(--ink-2);
  border: 1px solid var(--line);
}

.page-about .ab-swatch__dot {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  border: 1px solid var(--line);
}

.page-about .ab-swatch__dot--ink { background: var(--ink-0); }
.page-about .ab-swatch__dot--gold { background: var(--gold); }
.page-about .ab-swatch__dot--rose { background: var(--rose); }
.page-about .ab-swatch__dot--teal { background: var(--teal); }
.page-about .ab-swatch__dot--paper { background: var(--paper); }

.page-about .ab-swatch__name {
  font-family: var(--sans);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .ab-swatch__hex {
  width: 100%;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .ab-cta {
  padding: clamp(40px, 6vw, 72px) 0;
  background:
    linear-gradient(120deg, var(--ink-2) 0%, var(--ink-0) 100%);
  border-top: 3px solid var(--gold);
}

.page-about .ab-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

.page-about .ab-cta__lead h2 {
  margin: 10px 0 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .ab-cta__lead p {
  margin: 12px 0 0;
  max-width: 58ch;
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .ab-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 700px) {
  .page-about .ab-zones {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .ab-rhythm__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
  }

  .page-about .ab-rhythm__key {
    padding-top: 2px;
  }

  .page-about .ab-principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 48px);
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .ab-sec__inner {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: clamp(26px, 4vw, 56px);
    align-items: start;
  }

  .page-about .ab-sec__marker {
    position: sticky;
    top: 96px;
    flex-direction: column;
    align-items: flex-start;
    align-self: start;
    height: max-content;
  }

  .page-about .ab-sec__marker::after {
    width: 2px;
    height: auto;
    min-height: 72px;
    flex: 1 1 auto;
  }

  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .ab-cta__links {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-benefits {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-hero__index {
    padding: 22px 22px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index a,
  .page-about .ab-zone,
  .page-about .ab-benefit,
  .page-about .ab-dual__tab,
  .page-about .ab-sec__marker::after,
  .page-about .ab-rhythm__item::before {
    transition: none;
  }

  .page-about .ab-zone:hover,
  .page-about .ab-benefit:hover,
  .page-about .ab-index a:hover {
    transform: none;
    padding-left: 6px;
  }
}