.page-about {
  --ab-rail-w: 216px;
  --ab-bar-h: 10px;
}

/* ---------- HERO ---------- */
.page-about .ab-hero {
  padding: var(--wh-sp-4) 0 var(--wh-sp-5);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(46, 140, 120, 0.16) 0%, rgba(46, 140, 120, 0) 58%),
    linear-gradient(180deg, var(--wh-navy) 0%, var(--wh-navy-deep) 100%);
  color: var(--wh-white);
}

.page-about .ab-hero .wh-breadcrumb__link,
.page-about .ab-hero .wh-breadcrumb__now {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .ab-hero .wh-breadcrumb__sep {
  color: rgba(255, 255, 255, 0.34);
}

.page-about .ab-hero__frame {
  margin-top: var(--wh-sp-3);
  background: rgba(10, 31, 56, 0.42);
  border-color: rgba(46, 92, 138, 0.5);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--wh-sp-4);
}

.page-about .ab-hero .wh-page-title {
  margin: var(--wh-sp-2) 0 var(--wh-sp-3);
  font-family: var(--wh-font-display);
  font-weight: 800;
  font-size: clamp(28px, 6vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--wh-white);
  max-width: 18ch;
}

.page-about .ab-hero .wh-lead {
  max-width: 62ch;
  color: rgba(255, 255, 255, 0.8);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--wh-sp-2);
  margin-top: var(--wh-sp-4);
}

.page-about .ab-hero__actions .wh-btn--line {
  color: var(--wh-white);
  border-color: rgba(255, 255, 255, 0.4);
}

.page-about .ab-hero__actions .wh-btn--line:hover,
.page-about .ab-hero__actions .wh-btn--line:focus-visible {
  border-color: var(--wh-amber);
  color: var(--wh-amber-soft);
}

.page-about .ab-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(46, 92, 138, 0.4);
  border: 1px solid rgba(46, 92, 138, 0.4);
}

.page-about .ab-stat {
  background: rgba(7, 23, 41, 0.86);
  padding: var(--wh-sp-3) var(--wh-sp-2);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-stat .wh-num {
  font-family: var(--wh-font-display);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--wh-amber);
}

.page-about .ab-stat .wh-num__unit {
  font-size: 0.42em;
  letter-spacing: 0.08em;
  color: var(--wh-amber-soft);
}

.page-about .ab-stat .wh-num__label {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.66);
}

.page-about .ab-hero .wh-ticks {
  border-top-color: rgba(46, 92, 138, 0.4);
}

/* ---------- LAYOUT ---------- */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--wh-sp-4);
  padding-top: var(--wh-sp-5);
  padding-bottom: var(--wh-sp-5);
  background: var(--wh-white);
}

.page-about .ab-rail {
  display: none;
}

.page-about .ab-rail__title {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--wh-gray);
  margin: 0 0 var(--wh-sp-2);
}

.page-about .ab-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--wh-line-veil);
}

.page-about .ab-rail__list .wh-rail__link {
  display: block;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--wh-gray);
  border-left: 2px solid transparent;
  margin-left: -1px;
  text-decoration: none;
  transition: color 180ms var(--wh-ease), border-color 180ms var(--wh-ease);
}

.page-about .ab-rail__list .wh-rail__link:hover,
.page-about .ab-rail__list .wh-rail__link:focus-visible {
  color: var(--wh-navy);
}

.page-about .ab-rail__list .wh-rail__link[aria-current="true"] {
  color: var(--wh-amber-deep);
  border-left-color: var(--wh-amber);
  font-weight: 600;
}

.page-about .ab-rail__cta {
  display: inline-block;
  margin-top: var(--wh-sp-3);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--wh-celadon-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--wh-celadon-soft);
  padding-bottom: 2px;
}

.page-about .ab-flow {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--wh-sp-5);
}

/* ---------- BLOCK ---------- */
.page-about .ab-block {
  padding-top: var(--wh-sp-2);
  border-top: 1px solid var(--wh-line-veil);
  scroll-margin-top: calc(var(--wh-header-h) + 24px);
}

.page-about .ab-block .wh-section__title {
  font-family: var(--wh-font-display);
  font-weight: 800;
  font-size: clamp(20px, 3.6vw, 28px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--wh-navy);
  margin: 6px 0 var(--wh-sp-2);
  max-width: 26ch;
}

.page-about .ab-block .wh-section__lede {
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--wh-gray);
  margin: 0 0 var(--wh-sp-4);
}

/* ---------- V-01 CLARIFY ---------- */
.page-about .ab-clarify {
  gap: var(--wh-sp-4);
}

.page-about .ab-clarify__body p {
  margin: 0 0 var(--wh-sp-2);
  font-size: 16px;
  line-height: 1.8;
  color: var(--wh-ink);
  max-width: 62ch;
}

.page-about .ab-clarify__side {
  display: flex;
  flex-direction: column;
  gap: var(--wh-sp-2);
}

.page-about .ab-clarify__side .wh-card__title {
  font-family: var(--wh-font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--wh-navy);
  margin: 6px 0 4px;
}

/* ---------- V-02 PHASES ---------- */
.page-about .ab-phases {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-about .ab-phase {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: var(--wh-sp-3);
  padding: var(--wh-sp-3) 0;
  border-top: 1px solid var(--wh-line-veil);
  align-items: start;
}

.page-about .ab-phase:last-child {
  border-bottom: 1px solid var(--wh-line-veil);
}

.page-about .ab-phase__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--wh-white);
  background: var(--wh-eng);
  padding: 5px 8px;
  border-radius: var(--wh-radius);
  text-align: center;
}

.page-about .ab-phase__title {
  font-family: var(--wh-font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--wh-navy);
  margin: 0 0 6px;
}

.page-about .ab-phase__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--wh-gray);
  max-width: 62ch;
}

/* ---------- V-03 NETWORK ---------- */
.page-about .ab-network {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--wh-sp-3);
}

.page-about .ab-network__text p {
  margin: 0 0 var(--wh-sp-2);
  font-size: 16px;
  line-height: 1.8;
  color: var(--wh-ink);
  max-width: 62ch;
}

.page-about .ab-network__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--wh-line-veil);
  border: 1px solid var(--wh-line-veil);
}

.page-about .ab-node {
  background: var(--wh-mist);
  padding: var(--wh-sp-2);
  font-family: var(--wh-font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--wh-gray);
  display: flex;
  align-items: center;
  min-height: 56px;
}

.page-about .ab-node--hub {
  background: linear-gradient(135deg, var(--wh-eng) 0%, var(--wh-navy) 100%);
  color: var(--wh-white);
  position: relative;
  padding-left: 30px;
}

.page-about .ab-node--hub::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-radius: 50%;
  background: var(--wh-amber);
  box-shadow: 0 0 0 3px rgba(240, 130, 60, 0.22);
}

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

.page-about .ab-figure__media {
  background: linear-gradient(135deg, var(--wh-mist) 0%, rgba(168, 216, 203, 0.4) 100%);
  border: 1px solid var(--wh-line-veil);
  overflow: hidden;
}

.page-about .ab-figure .wh-figure__cap {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--wh-gray);
}

/* ---------- V-04 BARS ---------- */
.page-about .ab-bars {
  display: flex;
  flex-direction: column;
  gap: var(--wh-sp-3);
  margin-bottom: var(--wh-sp-4);
}

.page-about .ab-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
}

.page-about .ab-bar__label {
  font-size: 14px;
  color: var(--wh-gray);
}

.page-about .ab-bar__track {
  display: block;
  position: relative;
  height: var(--ab-bar-h);
  background: var(--wh-mist);
  border: 1px solid var(--wh-celadon-soft);
  border-radius: var(--wh-radius-pill);
  overflow: hidden;
}

.page-about .ab-bar__fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: var(--wh-radius-pill);
  background: linear-gradient(90deg, var(--wh-amber) 0%, var(--wh-amber-soft) 100%);
  transition: width 720ms var(--wh-ease) var(--d, 0ms);
}

.page-about .ab-bar__fill--alt {
  background: linear-gradient(90deg, var(--wh-celadon-deep) 0%, var(--wh-celadon) 100%);
}

.page-about .ab-bars.is-revealed .ab-bar__fill {
  width: var(--w, 0%);
}

.page-about .ab-bar__val {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--wh-navy);
  font-weight: 600;
}

.page-about .ab-coop {
  gap: var(--wh-sp-2);
}

.page-about .ab-coop .wh-card__title {
  font-family: var(--wh-font-display);
  font-weight: 700;
  font-size: 18px;
  color: var(--wh-navy);
  margin: 6px 0 6px;
}

/* ---------- V-05 CERTS ---------- */
.page-about .ab-figure--doc {
  margin-bottom: var(--wh-sp-4);
}

.page-about .ab-certs {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--wh-sp-2);
}

.page-about .ab-cert {
  border: 3px double var(--wh-line-soft);
  background: var(--wh-white);
  padding: var(--wh-sp-3);
  transition: border-color 200ms var(--wh-ease), transform 200ms var(--wh-ease);
}

.page-about .ab-cert:hover,
.page-about .ab-cert:focus-visible {
  border-color: var(--wh-celadon);
  transform: translateY(-2px);
  outline: none;
}

.page-about .ab-cert__no {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--wh-celadon-deep);
  margin: 0;
}

.page-about .ab-cert__name {
  font-family: var(--wh-font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--wh-navy);
  margin: 8px 0 6px;
}

.page-about .ab-cert__scope {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--wh-gray);
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 240ms var(--wh-ease), opacity 200ms var(--wh-ease);
}

.page-about .ab-cert:hover .ab-cert__scope,
.page-about .ab-cert:focus-visible .ab-cert__scope {
  max-height: 140px;
  opacity: 1;
}

/* ---------- V-06 TEAM ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--wh-sp-3);
}

.page-about .ab-team__list {
  margin: 0 0 var(--wh-sp-3);
  border-top: 1px solid var(--wh-line-veil);
}

.page-about .ab-team__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--wh-sp-2);
  padding: 12px 0;
  border-bottom: 1px solid var(--wh-line-veil);
}

.page-about .ab-team__row dt {
  font-size: 15px;
  color: var(--wh-gray);
}

.page-about .ab-team__row dd {
  margin: 0;
  font-size: 15px;
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--wh-navy);
  text-align: right;
}

.page-about .ab-team__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--wh-gray);
  max-width: 62ch;
  border-left: 3px solid var(--wh-celadon);
  padding-left: var(--wh-sp-2);
}

.page-about .ab-figure--team .wh-figure__media {
  background: linear-gradient(160deg, var(--wh-mist) 0%, rgba(255, 192, 138, 0.28) 100%);
}

/* ---------- V-07 TABS ---------- */
.page-about .ab-tabs {
  border-top: 1px solid var(--wh-line-veil);
}

.page-about .ab-panel {
  padding: var(--wh-sp-3) 0 var(--wh-sp-2);
}

.page-about .ab-panel__title {
  font-family: var(--wh-font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--wh-navy);
  margin: 0 0 var(--wh-sp-2);
}

.page-about .ab-panel__text {
  margin: 0 0 var(--wh-sp-2);
  font-size: 16px;
  line-height: 1.8;
  color: var(--wh-ink);
  max-width: 62ch;
}

.page-about .ab-panel__list {
  list-style: none;
  margin: 0 0 var(--wh-sp-3);
  padding: 0;
}

.page-about .ab-panel__list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--wh-gray);
}

.page-about .ab-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 2px;
  background: var(--wh-amber);
}

/* ---------- V-08 CLOSING ---------- */
.page-about .ab-closing {
  background: linear-gradient(135deg, var(--wh-eng) 0%, var(--wh-navy) 100%);
  color: var(--wh-white);
  padding: var(--wh-sp-4) var(--wh-sp-3);
  position: relative;
  overflow: hidden;
}

.page-about .ab-closing::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 140, 120, 0.34) 0%, rgba(46, 140, 120, 0) 70%);
  pointer-events: none;
}

.page-about .ab-closing .wh-index {
  color: var(--wh-amber-soft);
}

.page-about .ab-closing__title {
  font-family: var(--wh-font-display);
  font-weight: 800;
  font-size: clamp(20px, 3.6vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--wh-white);
  margin: 8px 0 var(--wh-sp-2);
  max-width: 24ch;
}

.page-about .ab-closing__text {
  margin: 0 0 var(--wh-sp-3);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
  max-width: 58ch;
}

.page-about .ab-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--wh-sp-2);
  position: relative;
  z-index: 1;
}

.page-about .ab-closing__actions .wh-btn--line {
  color: var(--wh-white);
  border-color: rgba(255, 255, 255, 0.4);
}

.page-about .ab-closing__actions .wh-btn--line:hover,
.page-about .ab-closing__actions .wh-btn--line:focus-visible {
  border-color: var(--wh-amber);
  color: var(--wh-amber-soft);
}

/* ---------- RESPONSIVE ---------- */
@media (min-width: 600px) {
  .page-about .ab-bar {
    grid-template-columns: 180px minmax(0, 1fr) 100px;
    align-items: center;
    gap: var(--wh-sp-2);
  }

  .page-about .ab-bar__val {
    text-align: right;
  }

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

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

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: var(--wh-sp-5);
    align-items: start;
  }

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

  .page-about .ab-network {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-network__grid {
    align-self: stretch;
  }

  .page-about .ab-network .ab-figure {
    grid-column: 1 / -1;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--wh-sp-4);
  }
}

@media (min-width: 1024px) {
  .page-about .ab-layout {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: var(--wh-sp-5);
  }

  .page-about .ab-rail {
    display: block;
    position: sticky;
    top: calc(var(--wh-header-h) + 32px);
    align-self: start;
  }

  .page-about .ab-clarify {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .ab-phase {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: var(--wh-sp-4);
  }

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

  .page-about .ab-closing {
    padding: var(--wh-sp-5) var(--wh-sp-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-bar__fill,
  .page-about .ab-cert,
  .page-about .ab-cert__scope,
  .page-about .ab-rail__list .wh-rail__link {
    transition: none !important;
  }

  .page-about .ab-bars.is-revealed .ab-bar__fill {
    transition: none;
  }

  .page-about .ab-cert:hover,
  .page-about .ab-cert:focus-visible {
    transform: none;
  }

  .page-about .ab-cert__scope {
    max-height: none;
    opacity: 1;
  }
}

@media (max-width: 599px) {
  .page-about .ab-hero {
    padding-top: var(--wh-sp-3);
  }

  .page-about .ab-phase {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--wh-sp-2);
  }

  .page-about .ab-closing {
    padding: var(--wh-sp-3) var(--wh-sp-2);
  }
}

.page-about {
  --d: 0.3s;
  --w: 1rem;
}