.page-about {
  --ab-gap: clamp(20px, 3vw, 36px);
  --ab-rule: 1px solid var(--line);
  background: var(--ink);
}

.page-about .ab-hero {
  position: relative;
  padding: clamp(26px, 4vw, 48px) 0 clamp(40px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(53, 224, 208, 0.09), transparent 62%),
    linear-gradient(180deg, var(--deep), var(--ink) 88%);
  border-bottom: var(--ab-rule);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -80px;
  width: 340px;
  height: 340px;
  border: 1px solid rgba(53, 224, 208, 0.16);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-about .ab-hero__lead h1 {
  margin: 12px 0 18px;
  color: var(--warm);
  font-size: clamp(2.1rem, 7vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-about .ab-hero__text {
  margin: 0 0 24px;
  max-width: 54ch;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.8;
}

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

.page-about .ab-index {
  padding: 20px 22px 18px;
  background: rgba(24, 53, 44, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}

.page-about .ab-index__head {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .ab-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 2px;
  border-bottom: 1px dashed var(--line);
  color: var(--warm);
  font-size: 0.95rem;
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), transform var(--ease);
}

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

.page-about .ab-index__list a:hover,
.page-about .ab-index__list a:focus-visible {
  color: var(--cyan);
  border-color: rgba(53, 224, 208, 0.5);
  transform: translateX(2px);
}

.page-about .ab-index__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--apricot);
}

.page-about .ab-index__note {
  margin: 14px 0 0;
  font-size: 0.78rem;
  color: var(--mist);
}

.page-about .ab-section {
  padding: clamp(42px, 6vw, 80px) 0;
  border-top: var(--ab-rule);
}

.page-about .ab-section h2 {
  margin: 0 0 16px;
  color: var(--warm);
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 4.2vw, 2.4rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-about .ab-body > p {
  margin: 0 0 26px;
  max-width: 62ch;
  color: var(--mist);
  line-height: 1.78;
}

.page-about .ab-body h3 {
  margin: 0 0 8px;
  color: var(--warm);
  font-size: 1.02rem;
  line-height: 1.4;
}

.page-about .ab-body h3 + p,
.page-about .ab-body p {
  color: var(--mist);
  line-height: 1.75;
}

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

.page-about .ab-aside {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-aside__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--apricot);
}

.page-about .ab-aside__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .ab-year-nav {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.page-about .ab-year-nav a {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.page-about .ab-year-nav a:hover,
.page-about .ab-year-nav a:focus-visible {
  color: var(--on-accent);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .ab-stance-list {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-about .ab-stance__item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  padding: 18px 20px;
  background: var(--moss);
  border: 1px solid var(--line);
  border-left: 3px solid var(--apricot);
  border-radius: var(--r-md);
  transition: border-color var(--ease), transform var(--ease);
}

.page-about .ab-stance__item:hover {
  border-color: var(--cyan);
  border-left-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .ab-stance__item p {
  margin: 0;
  font-size: 0.94rem;
}

.page-about .ab-stance__num {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--apricot);
  padding-top: 3px;
}

.page-about .ab-quote {
  margin: 0;
  padding: 26px 26px 30px;
  background: linear-gradient(120deg, var(--deep), var(--moss));
  border: 1px solid var(--line);
  border-radius: 4px var(--r-lg) 4px var(--r-lg);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), 0 100%);
}

.page-about .ab-quote p {
  margin: 0;
  max-width: 44ch;
  color: var(--warm);
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  line-height: 1.42;
  letter-spacing: 0.005em;
}

.page-about .ab-tl-visual {
  margin: 0 0 30px;
}

.page-about .ab-tl-visual img,
.page-about .ab-team__visual img,
.page-about .ab-collab__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--moss);
  filter: saturate(0.9) contrast(1.05);
}

.page-about .ab-tl-visual .media-caption,
.page-about .ab-team__visual .media-caption,
.page-about .ab-collab__visual .media-caption {
  margin: 10px 0 0;
  font-size: 0.78rem;
  color: var(--mist);
  line-height: 1.6;
}

.page-about .ab-tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--apricot) 55%, var(--line));
  opacity: 0.7;
}

.page-about .ab-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  padding-bottom: 26px;
  scroll-margin-top: 96px;
}

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

.page-about .ab-tl__year {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  height: 56px;
  background: var(--moss);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  color: var(--warm);
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.page-about .ab-tl__item:hover .ab-tl__year {
  background: var(--apricot);
  border-color: var(--apricot);
  color: var(--on-accent);
}

.page-about .ab-tl__body {
  padding-top: 4px;
}

.page-about .ab-tl__body p {
  margin: 0;
  font-size: 0.94rem;
}

.page-about .ab-team {
  display: grid;
  gap: 26px;
}

.page-about .ab-team__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .ab-team__row {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(24, 53, 44, 0.62);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: border-color var(--ease);
}

.page-about .ab-team__row:hover {
  border-color: var(--cyan);
}

.page-about .ab-team__row p {
  margin: 0;
  font-size: 0.92rem;
}

.page-about .ab-team__num {
  font-family: var(--font-mono);
  font-size: 1.55rem;
  line-height: 1;
  color: var(--apricot);
  letter-spacing: 0.01em;
}

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

.page-about .ab-collab {
  margin-bottom: 26px;
}

.page-about .ab-collab__card {
  padding: 22px 22px 24px;
  background: var(--moss);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: border-color var(--ease);
}

.page-about .ab-collab__card:hover {
  border-color: var(--cyan);
}

.page-about .ab-collab__card p {
  margin: 0;
  font-size: 0.92rem;
}

.page-about .ab-collab__tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  background: var(--apricot);
  color: var(--on-accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.page-about .ab-collab__tag--cyan {
  background: var(--cyan);
}

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

.page-about .ab-flow-arrow {
  display: block;
  width: 100%;
  max-width: 260px;
  height: 12px;
  margin: 0 0 22px;
  color: var(--cyan);
  opacity: 0.6;
}

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

.page-about .ab-flow__item {
  position: relative;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 16px 0 22px 18px;
  border-left: 2px solid var(--line);
}

.page-about .ab-flow__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 22px;
  width: 12px;
  height: 12px;
  background: var(--cyan);
  border-radius: 3px;
  transform: rotate(45deg);
}

.page-about .ab-flow__item:hover {
  border-left-color: var(--apricot);
}

.page-about .ab-flow__item p {
  margin: 0;
  font-size: 0.92rem;
}

.page-about .ab-flow__no {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--apricot);
  padding-top: 3px;
}

.page-about .ab-honor {
  display: grid;
  gap: 18px;
  margin-bottom: 24px;
}

.page-about .ab-honor__item {
  padding: 24px 24px 26px;
  background: var(--moss);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  border-radius: var(--r-md);
}

.page-about .ab-honor__item--alt {
  border-top-color: var(--cyan);
}

.page-about .ab-honor__item p {
  margin: 0;
  font-size: 0.92rem;
}

.page-about .ab-honor__tag {
  display: inline-block;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .ab-honor__tag--cyan {
  color: var(--cyan);
}

.page-about .ab-honor__foot {
  margin: 0;
  font-size: 0.95rem;
  color: var(--mist);
  line-height: 1.75;
}

.page-about .ab-honor__foot a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--ease);
}

.page-about .ab-honor__foot a:hover,
.page-about .ab-honor__foot a:focus-visible {
  color: var(--apricot);
}

.page-about .ab-cta {
  padding: clamp(34px, 5vw, 58px) 0;
  background:
    linear-gradient(180deg, var(--ink), var(--deep)),
    var(--deep);
  border-top: 1px solid var(--line);
}

.page-about .ab-cta__inner {
  display: grid;
  gap: 22px;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(24, 53, 44, 0.5);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), 0 100%);
}

.page-about .ab-cta h2 {
  margin: 10px 0 0;
  color: var(--warm);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 4vw, 2rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
}

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

@media (min-width: 760px) {
  .page-about .ab-collab {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }

  .page-about .ab-team__row {
    grid-template-columns: 60px 1fr;
  }

  .page-about .ab-team__num {
    font-size: 1.85rem;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
    gap: clamp(36px, 5vw, 64px);
  }

  .page-about .ab-index {
    margin-top: 8px;
  }

  .page-about .ab-split {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-about .ab-aside {
    position: sticky;
    top: 96px;
    display: block;
    border-bottom: 0;
    padding-bottom: 0;
    border-left: 2px solid var(--line);
    padding-left: 18px;
  }

  .page-about .ab-aside__no {
    font-size: 2.2rem;
    margin-bottom: 8px;
  }

  .page-about .ab-aside__label {
    margin-bottom: 16px;
    line-height: 1.6;
  }

  .page-about .ab-year-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .page-about .ab-year-nav a {
    text-align: center;
    padding: 6px 0;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    align-items: start;
    gap: 28px;
  }

  .page-about .ab-honor {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 34px 36px;
  }

  .page-about .ab-flow__item {
    grid-template-columns: 52px 1fr;
    padding-right: 24px;
  }

  .page-about .ab-tl__item {
    grid-template-columns: 96px 1fr;
    gap: 26px;
    padding-bottom: 30px;
  }

  .page-about .ab-tl::before {
    left: 47px;
  }

  .page-about .ab-tl__year {
    height: 62px;
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index__list a,
  .page-about .ab-year-nav a,
  .page-about .ab-stance__item,
  .page-about .ab-tl__year,
  .page-about .ab-team__row,
  .page-about .ab-collab__card {
    transition: none;
  }

  .page-about .ab-index__list a:hover,
  .page-about .ab-stance__item:hover {
    transform: none;
  }
}