.page-about {
  --ab-gutter: clamp(16px, 4vw, 32px);
  background: var(--hg-ink);
  color: var(--hg-cream);
}

/* ---------- Hero ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 6vw, 52px) 0 clamp(40px, 7vw, 72px);
  border-bottom: 1px solid var(--hg-line-soft);
}

.page-about .ab-hero__glow {
  position: absolute;
  top: -26%;
  right: -14%;
  width: min(76vw, 620px);
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(circle at 62% 38%, rgba(255, 106, 42, 0.34), transparent 58%),
    radial-gradient(circle at 30% 72%, rgba(46, 211, 255, 0.2), transparent 62%),
    radial-gradient(circle at 78% 82%, rgba(122, 31, 61, 0.42), transparent 60%);
  pointer-events: none;
}

.page-about .ab-hero .hg-breadcrumb {
  position: relative;
  margin-bottom: clamp(16px, 3vw, 26px);
}

.page-about .ab-hero__title {
  position: relative;
  margin: 12px 0 0;
  max-width: 22ch;
  font-size: clamp(2rem, 7.4vw, 4.6rem);
  font-weight: 250;
  line-height: 1.04;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .ab-hero__title b {
  font-family: var(--hg-mono);
  font-weight: 900;
  color: var(--hg-orange);
  letter-spacing: -0.01em;
}

.page-about .ab-hero__lede {
  position: relative;
  margin: clamp(16px, 3vw, 24px) 0 0;
  max-width: 60ch;
}

.page-about .ab-figures {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 5vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--hg-line-soft);
  border: 1px solid var(--hg-line-soft);
  border-radius: 16px;
  overflow: hidden;
}

.page-about .ab-figure {
  background: var(--hg-ink-2);
  padding: 16px 14px 15px;
}

.page-about .ab-figure__num {
  display: block;
  font-family: var(--hg-mono);
  font-size: clamp(1.35rem, 4.4vw, 1.95rem);
  font-weight: 700;
  line-height: 1;
  color: var(--hg-cream);
}

.page-about .ab-figure__num small {
  margin-left: 3px;
  font-size: 0.5em;
  font-weight: 400;
  color: var(--hg-orange);
}

.page-about .ab-figure__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--hg-muted);
}

/* ---------- Shell ---------- */
.page-about .ab-shell {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  padding-top: clamp(30px, 6vw, 60px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- Index (mobile: chip rail) ---------- */
.page-about .ab-index {
  min-width: 0;
}

.page-about .ab-index__cap {
  margin: 0 0 10px;
  font-family: var(--hg-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--hg-muted);
}

.page-about .ab-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .ab-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .ab-index__item {
  flex: 0 0 auto;
}

.page-about .ab-index__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--hg-line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--hg-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--hg-ease), border-color 0.2s var(--hg-ease);
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  color: var(--hg-cream);
  border-color: var(--hg-orange);
}

.page-about .ab-index__no {
  font-family: var(--hg-mono);
  font-size: 11px;
  color: var(--hg-orange);
}

/* ---------- Body ---------- */
.page-about .ab-body {
  min-width: 0;
  display: grid;
  gap: clamp(46px, 8vw, 92px);
}

.page-about .ab-sec {
  min-width: 0;
  scroll-margin-top: calc(var(--hg-header-h) + 24px);
}

.page-about .ab-sec__head {
  margin-bottom: clamp(16px, 3vw, 24px);
}

.page-about .ab-sec__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--hg-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--hg-orange);
}

.page-about .ab-sec__title {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(1.4rem, 4.2vw, 2.3rem);
  font-weight: 300;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--hg-cream);
  text-wrap: balance;
}

.page-about .ab-sec__intro,
.page-about .ab-prose p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(244, 233, 216, 0.84);
}

.page-about .ab-sec__intro {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .ab-prose p + p {
  margin-top: 14px;
}

.page-about .ab-prose--after {
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- Media ---------- */
.page-about .ab-media {
  margin: clamp(22px, 4vw, 34px) 0 0;
  border: 1px solid var(--hg-line-soft);
  border-radius: 18px;
}

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

.page-about .ab-media--partner {
  margin-top: clamp(18px, 3vw, 26px);
}

/* ---------- Timeline ---------- */
.page-about .ab-timeline {
  position: relative;
  padding-left: 22px;
  border-left: 2px solid var(--hg-line);
}

.page-about .ab-node {
  position: relative;
  border-bottom: 1px solid var(--hg-line-soft);
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 20px;
  width: 10px;
  height: 10px;
  background: var(--hg-ink-3);
  border: 2px solid var(--hg-orange);
  border-radius: 2px;
  transition: background 0.2s var(--hg-ease), border-color 0.2s var(--hg-ease);
}

.page-about .ab-node[open]::before {
  background: var(--hg-orange);
}

.page-about .ab-node > summary {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 12px;
  min-height: 52px;
  padding: 15px 0 14px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-node > summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-node > summary:focus-visible {
  outline: 2px solid var(--hg-blue);
  outline-offset: 3px;
}

.page-about .ab-node__year {
  font-family: var(--hg-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--hg-blue);
}

.page-about .ab-node__ver {
  font-family: var(--hg-mono);
  font-size: 12px;
  padding: 2px 7px;
  border: 1px solid var(--hg-line);
  border-radius: 4px;
  color: var(--hg-yellow);
}

.page-about .ab-node__name {
  font-size: 15px;
  font-weight: 500;
  color: var(--hg-cream);
}

.page-about .ab-node__mark {
  margin-left: auto;
  font-family: var(--hg-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--hg-orange);
}

.page-about .ab-node__mark::before {
  content: "+";
}

.page-about .ab-node[open] .ab-node__mark::before {
  content: "–";
}

.page-about .ab-node__body {
  padding: 0 0 18px;
}

.page-about .ab-node__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 233, 216, 0.78);
}

/* ---------- Team grid ---------- */
.page-about .ab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-card {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid var(--hg-line-soft);
  border-left: 3px solid var(--hg-orange);
  border-radius: 0 16px 16px 0;
  background: linear-gradient(150deg, var(--hg-ink-2), rgba(20, 53, 44, 0.45));
  transition: transform 0.25s var(--hg-ease), border-left-color 0.25s var(--hg-ease);
}

.page-about .ab-card:hover,
.page-about .ab-card:focus-within {
  transform: translateY(-3px);
  border-left-color: var(--hg-blue);
}

.page-about .ab-card__icon {
  display: block;
  margin-bottom: 14px;
  color: var(--hg-orange);
}

.page-about .ab-card:hover .ab-card__icon {
  color: var(--hg-blue);
}

.page-about .ab-card__title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--hg-cream);
}

.page-about .ab-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(244, 233, 216, 0.8);
}

.page-about .ab-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-chip {
  padding: 4px 9px;
  border: 1px solid var(--hg-line-soft);
  border-radius: 4px;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--hg-muted);
  transition: color 0.2s var(--hg-ease), border-color 0.2s var(--hg-ease);
}

.page-about .ab-card:hover .ab-chip {
  color: var(--hg-yellow);
  border-color: rgba(255, 209, 102, 0.45);
}

/* ---------- Panels ---------- */
.page-about .ab-panel {
  padding: clamp(20px, 4vw, 32px);
  border-radius: 20px;
}

.page-about .ab-panel--indigo {
  border: 1px solid rgba(59, 42, 107, 0.9);
  background: linear-gradient(160deg, rgba(59, 42, 107, 0.72), rgba(11, 31, 26, 0.2) 76%);
}

.page-about .ab-panel--wine {
  border: 1px solid rgba(122, 31, 61, 0.75);
  background: linear-gradient(160deg, rgba(122, 31, 61, 0.6), rgba(11, 31, 26, 0.15) 78%);
}

/* ---------- Steps ---------- */
.page-about .ab-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid rgba(244, 233, 216, 0.16);
}

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

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

.page-about .ab-step__no {
  font-family: var(--hg-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--hg-orange);
}

.page-about .ab-step__title {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 700;
  color: var(--hg-cream);
}

.page-about .ab-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 233, 216, 0.82);
}

/* ---------- Partners ---------- */
.page-about .ab-sub {
  margin: clamp(22px, 4vw, 30px) 0 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--hg-yellow);
}

.page-about .ab-types {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .ab-type {
  display: grid;
  gap: 4px;
  padding: 14px 15px;
  border: 1px solid rgba(244, 233, 216, 0.16);
  border-radius: 12px;
  background: rgba(11, 31, 26, 0.42);
  transition: border-color 0.2s var(--hg-ease), background 0.2s var(--hg-ease);
}

.page-about .ab-type:hover {
  border-color: var(--hg-blue);
  background: rgba(11, 31, 26, 0.66);
}

.page-about .ab-type__name {
  font-size: 15px;
  font-weight: 700;
  color: var(--hg-cream);
}

.page-about .ab-type__desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 233, 216, 0.76);
}

.page-about .ab-flowline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

.page-about .ab-prose__tail {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 233, 216, 0.78);
}

/* ---------- Contact ---------- */
.page-about .ab-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .ab-contact__row {
  padding: 14px 16px;
  border: 1px solid var(--hg-line-soft);
  border-radius: 12px;
  background: rgba(20, 53, 44, 0.55);
}

.page-about .ab-contact__key {
  display: block;
  font-family: var(--hg-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--hg-muted);
}

.page-about .ab-contact__val {
  display: block;
  margin-top: 7px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--hg-cream);
  word-break: break-word;
}

.page-about .ab-note {
  margin-top: clamp(16px, 3vw, 22px);
}

.page-about .ab-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
}

.page-about .ab-legal {
  margin: clamp(16px, 3vw, 22px) 0 0;
  font-size: 12px;
  line-height: 1.8;
  color: var(--hg-muted);
}

/* ---------- Breakpoints ---------- */
@media (min-width: 600px) {
  .page-about .ab-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .ab-contact__row--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 960px) {
  .page-about .ab-shell {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .ab-index {
    position: sticky;
    top: calc(var(--hg-header-h) + 28px);
    padding-left: 18px;
    border-left: 1px solid var(--hg-line-soft);
  }

  .page-about .ab-index__cap {
    margin-bottom: 16px;
  }

  .page-about .ab-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .ab-index__link {
    width: 100%;
    min-height: 0;
    padding: 11px 0;
    border: 0;
    border-radius: 0;
    font-size: 14px;
    background: none;
  }

  .page-about .ab-index__link:hover,
  .page-about .ab-index__link:focus-visible {
    color: var(--hg-cream);
    border-bottom: 1px solid var(--hg-orange);
  }

  .page-about .ab-hero__title {
    max-width: 18ch;
  }

  .page-about .ab-media {
    border-radius: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-card,
  .page-about .ab-card__icon,
  .page-about .ab-type,
  .page-about .ab-chip,
  .page-about .ab-node::before,
  .page-about .ab-index__link {
    transition: none;
  }

  .page-about .ab-card:hover,
  .page-about .ab-card:focus-within {
    transform: none;
  }
}