.page-about {
  --ab-rail: 220px;
  --ab-card-a: #0B1F33;
  --ab-card-b: #16304A;
  background: var(--paper);
  color: var(--ink);
}

.page-about .ab-hero {
  position: relative;
  padding: calc(var(--sp-section) * 0.72) 0 var(--sp-section);
  background:
    radial-gradient(680px 340px at 88% -12%, rgba(200, 148, 47, 0.16), transparent 70%),
    radial-gradient(520px 300px at 4% 108%, rgba(95, 122, 88, 0.1), transparent 72%);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: var(--sp-lg);
  align-items: start;
}

.page-about .ab-hero__label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: var(--sp-md) 0 0;
  color: var(--slate);
  letter-spacing: 0.16em;
}

.page-about .ab-hero__label::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--amber);
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  letter-spacing: -0.015em;
  max-width: 13em;
}

.page-about .ab-hero__lede {
  margin: var(--sp-md) 0 0;
  max-width: 36em;
  color: var(--ink-soft);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--sp-lg);
}

.page-about .ab-hero .btn--ghost {
  border-color: rgba(11, 31, 51, 0.22);
  color: var(--ink);
}

.page-about .ab-hero__card {
  background: linear-gradient(165deg, var(--ab-card-a) 0%, var(--ab-card-b) 100%);
  color: var(--paper);
  border: 1px solid var(--rule-inv);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: 0 18px 40px -28px rgba(11, 31, 51, 0.9);
}

.page-about .ab-hero__brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-about .ab-hero__name {
  font-family: var(--font-display);
  font-size: 1.32rem;
  letter-spacing: 0.02em;
}

.page-about .ab-hero__ver {
  color: var(--amber-bright);
  border: 1px solid rgba(200, 148, 47, 0.5);
  border-radius: var(--radius);
  padding: 2px 8px;
  font-size: 0.75rem;
}

.page-about .ab-hero__card-lede {
  margin: 10px 0 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .ab-stats {
  margin: var(--sp-md) 0 0;
  padding: 0;
}

.page-about .ab-stats__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-top: 1px dashed var(--rule-inv);
}

.page-about .ab-stats__row dt {
  margin: 0;
  font-size: 0.82rem;
  color: var(--mist);
}

.page-about .ab-stats__row dd {
  margin: 0;
  font-size: 0.92rem;
  color: var(--paper);
}

.page-about .ab-hero__card-note {
  margin: var(--sp-md) 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--rule-inv);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-about .ab-chap {
  margin: 0;
  font-size: clamp(2rem, 3.4vw, 3rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .ab-chap--inv {
  color: var(--amber-bright);
}

.page-about .ab-chap__name {
  margin: 10px 0 0;
  font-size: 0.76rem;
  letter-spacing: 0.28em;
  color: var(--slate);
}

.page-about .ab-split {
  display: grid;
  gap: var(--sp-md);
}

.page-about .ab-split__rail {
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-split__body .h2 {
  margin-top: 0;
  font-family: var(--font-display);
}

.page-about .ab-split__body p + p {
  margin-top: var(--sp-md);
}

.page-about .ab-split__body .prose {
  color: var(--ink-soft);
  max-width: 40em;
}

.page-about .ab-def {
  margin-top: var(--sp-lg);
}

.page-about .def-list__row {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-about .def-list__term {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-about .def-list__desc {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .ab-track {
  background: var(--ink);
  color: var(--paper);
}

.page-about .ab-track .h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  color: var(--paper);
  max-width: 20em;
}

.page-about .ab-track__lede {
  margin-top: var(--sp-md);
  max-width: 44em;
  color: var(--mist);
}

.page-about .ab-track__media {
  margin: var(--sp-lg) 0 0;
}

.page-about .ab-track__media img,
.page-about .ab-method__fig img,
.page-about .ab-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .ab-track__media img {
  border: 1px solid var(--rule-inv);
}

.page-about .ab-track .media__cap {
  margin-top: 10px;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .ab-track__acc {
  margin-top: var(--sp-lg);
  border-bottom: 1px solid var(--rule-inv);
}

.page-about .ab-track .acc__item {
  border-top: 1px solid var(--rule-inv);
}

.page-about .ab-track .acc__title {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .ab-track .acc__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 0;
  background: none;
  border: 0;
  color: var(--paper);
  font-family: var(--font-ui);
  font-size: clamp(1rem, 1.4vw, 1.16rem);
  text-align: left;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-about .ab-track .acc__trigger:hover {
  color: var(--amber-bright);
}

.page-about .ab-track .acc__num {
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--amber);
  min-width: 2.4em;
}

.page-about .ab-track .acc__icon {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-about .ab-track .acc__icon::before,
.page-about .ab-track .acc__icon::after {
  content: "";
  position: absolute;
  background: var(--amber);
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-track .acc__icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-about .ab-track .acc__icon::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-about .ab-track .acc__item[data-open="true"] .acc__icon::after {
  transform: scaleY(0);
}

.page-about .ab-track .acc__panel {
  overflow: hidden;
}

.page-about .ab-track .acc__item[data-open="false"] .acc__panel {
  display: none;
}

.page-about .ab-track .acc__inner {
  max-width: 62ch;
  padding: 0 0 22px;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .ab-track__foot {
  margin: var(--sp-lg) 0 0;
}

.page-about .ab-track .btn--ghost {
  border-color: rgba(174, 187, 198, 0.4);
  color: var(--paper);
}

.page-about .ab-method__top {
  display: grid;
  gap: var(--sp-lg);
  align-items: start;
}

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

.page-about .ab-method__fig img {
  border: 1px solid var(--line);
}

.page-about .ab-method .media__cap {
  margin-top: 10px;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .ab-method__text .h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
}

.page-about .ab-method__text .prose {
  margin-top: var(--sp-md);
  color: var(--ink-soft);
  max-width: 36em;
}

.page-about .ab-steps {
  list-style: none;
  margin: var(--sp-xl) 0 0;
  padding: 0;
  display: grid;
  gap: var(--sp-md);
}

.page-about .ab-steps__item {
  padding: 20px 0 0;
  border-top: 2px solid var(--amber);
}

.page-about .ab-steps__no {
  display: block;
  font-size: 1.5rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .ab-steps__item .h3 {
  margin: 10px 0 0;
}

.page-about .ab-steps__item p {
  margin: 8px 0 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .ab-tagblock {
  margin-top: var(--sp-xl);
  padding: clamp(20px, 3vw, 34px);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .ab-tagblock__title {
  margin: 0 0 var(--sp-md);
}

.page-about .ab-tagset {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
}

.page-about .ab-tagset li {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.page-about .ab-tagset__no {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--slate);
  flex: none;
}

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

.page-about .ab-team__head .h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  max-width: 22em;
}

.page-about .ab-team__lede {
  margin-top: var(--sp-md);
  max-width: 46em;
  color: var(--ink-soft);
}

.page-about .ab-team__fig {
  margin: var(--sp-lg) 0 0;
}

.page-about .ab-team__fig img {
  border: 1px solid var(--line);
}

.page-about .ab-team .media__cap {
  margin-top: 10px;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .ab-roles {
  margin-top: var(--sp-lg);
  display: grid;
  gap: var(--sp-md);
}

.page-about .ab-roles__item {
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-roles__no {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--clay);
}

.page-about .ab-roles__item .h3 {
  margin: 8px 0 0;
}

.page-about .ab-roles__item p:last-child {
  margin: 8px 0 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .ab-promise {
  margin-top: var(--sp-xl);
  display: grid;
  gap: var(--sp-md);
}

.page-about .ab-promise__item {
  padding: 22px clamp(16px, 2.4vw, 24px);
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--moss);
  border-radius: var(--radius);
}

.page-about .ab-promise__item:nth-child(2) {
  border-left-color: var(--signal);
}

.page-about .ab-promise__item:nth-child(3) {
  border-left-color: var(--amber);
}

.page-about .ab-promise__item:nth-child(4) {
  border-left-color: var(--slate);
}

.page-about .ab-promise__tag {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--slate);
}

.page-about .ab-promise__item .h3 {
  margin: 8px 0 0;
}

.page-about .ab-promise__item p:last-child {
  margin: 8px 0 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .ab-promise__mail {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
}

.page-about .ab-promise__mail:hover {
  color: var(--amber);
}

.page-about .ab-cta {
  background:
    linear-gradient(180deg, rgba(200, 148, 47, 0.08), transparent 55%),
    var(--paper);
}

.page-about .ab-cta__label {
  color: var(--slate);
  letter-spacing: 0.2em;
}

.page-about .ab-cta .h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
}

.page-about .ab-cta__grid {
  margin-top: var(--sp-lg);
  display: grid;
  gap: 14px;
}

.page-about .ab-cta__item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 20px 44px 20px clamp(18px, 2.4vw, 24px);
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .ab-cta__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--amber);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-cta__item:hover,
.page-about .ab-cta__item:focus-visible {
  border-color: rgba(200, 148, 47, 0.6);
  background: rgba(255, 255, 255, 0.86);
  transform: translateY(-2px);
}

.page-about .ab-cta__item:hover::before,
.page-about .ab-cta__item:focus-visible::before {
  transform: scaleY(1);
}

.page-about .ab-cta__no {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--slate);
}

.page-about .ab-cta__name {
  font-family: var(--font-display);
  font-size: 1.12rem;
}

.page-about .ab-cta__desc {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .ab-cta__go {
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--amber);
  font-size: 1.1rem;
  transition: transform var(--dur) var(--ease);
}

.page-about .ab-cta__item:hover .ab-cta__go {
  transform: translateY(-50%) translateX(4px);
}

@media (min-width: 720px) {
  .page-about .ab-tagset {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

  .page-about .ab-cta__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .def-list__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: clamp(36px, 5vw, 72px);
  }

  .page-about .ab-hero__card {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }

  .page-about .ab-split {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .ab-split__rail {
    position: sticky;
    top: 96px;
    align-self: start;
    padding-bottom: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding-left: 18px;
  }

  .page-about .ab-method__top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 64px);
    align-items: center;
  }

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

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

  .page-about .ab-cta__item {
    padding: 22px 30px 22px 20px;
  }

  .page-about .ab-cta__go {
    right: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-cta__item,
  .page-about .ab-cta__item::before,
  .page-about .ab-cta__go,
  .page-about .ab-track .acc__icon::before,
  .page-about .ab-track .acc__icon::after {
    transition: none;
  }

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