.page-about {
  --ab-gold-soft: rgba(201, 168, 106, 0.34);
  --ab-hair: rgba(143, 166, 191, 0.16);
  background: linear-gradient(180deg, var(--navy-900) 0%, var(--navy-800) 62%, var(--navy-900) 100%);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .ab-crumbs {
  padding-top: clamp(16px, 3vw, 26px);
}

.page-about .ab-crumbs .dp-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .ab-crumbs a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .ab-crumbs a:hover {
  color: var(--teal);
}

.page-about .ab-crumbs .dp-crumbs__current {
  color: var(--paper);
}

/* ---------- hero ---------- */
.page-about .ab-hero {
  padding-top: clamp(20px, 4vw, 42px);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .ab-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: 0.03em;
  line-height: 1.06;
  font-size: clamp(2.3rem, 9vw, 5.2rem);
  color: var(--paper);
}

.page-about .ab-hero__lede {
  margin-top: 20px;
  max-width: 46ch;
  color: var(--mist);
}

.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.page-about .ab-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ab-hero__facts .dp-mono {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--orange);
  letter-spacing: 0.04em;
}

.page-about .ab-hero__facts span:last-child {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

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

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

/* ---------- origin ---------- */
.page-about .ab-origin {
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-origin__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .ab-origin__mark {
  position: relative;
  display: flex;
  align-items: center;
  gap: 18px;
}

.page-about .ab-origin__big {
  font-size: clamp(2.6rem, 11vw, 4.4rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--gold);
  letter-spacing: 0.02em;
}

.page-about .ab-origin__spark {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--ab-gold-soft), transparent);
}

.page-about .ab-origin__body p {
  margin: 0 0 18px;
  color: var(--mist);
  max-width: 62ch;
}

.page-about .ab-origin__body .dp-title {
  margin: 8px 0 20px;
  color: var(--paper);
  font-size: clamp(1.9rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
}

.page-about .ab-origin__body p:last-child {
  margin-bottom: 0;
}

/* ---------- timeline ---------- */
.page-about .ab-timeline {
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-timeline__head .dp-title {
  margin: 8px 0 16px;
  font-size: clamp(1.9rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
  color: var(--paper);
}

.page-about .ab-track {
  position: relative;
  margin-top: clamp(28px, 5vw, 52px);
  padding-left: 26px;
}

.page-about .ab-track__rail {
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--ab-gold-soft), rgba(201, 168, 106, 0.06) 55%, transparent);
}

.page-about .ab-node {
  position: relative;
  display: grid;
  gap: 10px;
  padding-bottom: clamp(26px, 4vw, 44px);
}

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

.page-about .ab-node__year {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .ab-node__year .dp-mono {
  font-size: clamp(1.8rem, 6vw, 2.6rem);
  line-height: 1;
  color: var(--paper);
  letter-spacing: 0.03em;
}

.page-about .ab-node__dot {
  position: absolute;
  left: -24px;
  top: 10px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--navy-900);
  border: 1px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, 0.08);
  transition: background 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.page-about .ab-node:target .ab-node__dot,
.page-about .ab-node:target .ab-node__year .dp-mono {
  color: var(--orange);
}

.page-about .ab-node:target .ab-node__dot {
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 122, 26, 0.18);
}

.page-about .ab-node__card {
  border-left: 2px solid transparent;
  padding-left: 2px;
}

.page-about .ab-node:target .ab-node__card {
  border-left-color: var(--orange);
  padding-left: 16px;
}

.page-about .ab-node__title {
  margin: 0 0 8px;
  font-size: clamp(1.05rem, 3vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--teal);
}

.page-about .ab-node__card p {
  margin: 0;
  color: var(--mist);
  max-width: 58ch;
}

/* ---------- team ---------- */
.page-about .ab-team {
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-team .dp-section__head .dp-title {
  margin: 8px 0 16px;
  font-size: clamp(1.9rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
  color: var(--paper);
}

.page-about .ab-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-hair);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin: clamp(24px, 4vw, 40px) 0;
}

.page-about .ab-band__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 18px;
  background: var(--navy-900);
}

.page-about .ab-band__num {
  font-size: clamp(1.9rem, 6vw, 2.8rem);
  line-height: 1;
  color: var(--orange);
  letter-spacing: 0.02em;
}

.page-about .ab-band__item .dp-stat__label {
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .ab-team__split {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

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

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

.page-about .ab-team__text p {
  margin: 0 0 18px;
  color: var(--mist);
}

.page-about .ab-team__text p:last-child {
  margin-bottom: 0;
}

/* ---------- promise ---------- */
.page-about .ab-promise {
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-promise .dp-section__head .dp-title {
  margin: 8px 0 16px;
  font-size: clamp(1.9rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.15;
  color: var(--paper);
}

.page-about .ab-promise__layout {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .ab-promise__indexhead {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-promise__indexhead .dp-mono {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .ab-promise__hint {
  margin: 12px 0 6px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .ab-acc {
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-acc__sum {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 2px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(0.95rem, 2.6vw, 1.05rem);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--paper);
  transition: color 0.25s var(--ease-out);
}

.page-about .ab-acc__sum::-webkit-details-marker {
  display: none;
}

.page-about .ab-acc__sum:hover {
  color: var(--teal);
}

.page-about .ab-acc__code {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .ab-acc[open] .ab-acc__sum {
  color: var(--teal);
}

.page-about .ab-acc__body {
  padding: 0 2px 16px 34px;
}

.page-about .ab-acc__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .ab-promise__aside {
  display: grid;
  gap: 22px;
}

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

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

.page-about .ab-promise__note {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(11, 31, 58, 0.7);
}

.page-about .ab-promise__note p {
  margin: 8px 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- eco ---------- */
.page-about .ab-eco {
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-eco__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .ab-eco__lead .dp-title {
  margin: 8px 0 18px;
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.16;
  color: var(--paper);
}

.page-about .ab-eco__lead p {
  margin: 0 0 18px;
  color: var(--mist);
  max-width: 56ch;
}

.page-about .ab-eco__lead .dp-btn {
  margin-top: 6px;
}

.page-about .ab-eco__honors {
  display: grid;
  gap: 1px;
  background: var(--ab-hair);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  overflow: hidden;
}

.page-about .ab-honor {
  padding: 22px 20px;
  background: var(--navy-800);
}

.page-about .ab-honor__mark {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--ab-gold-soft);
  margin-bottom: 10px;
}

.page-about .ab-honor p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}

/* ---------- home / stable entry ---------- */
.page-about .ab-home {
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-home__panel {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  padding: clamp(24px, 5vw, 52px);
}

.page-about .ab-home__text .dp-title {
  margin: 8px 0 18px;
  font-size: clamp(1.7rem, 4.6vw, 2.6rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.16;
  color: var(--paper);
}

.page-about .ab-home__text p {
  margin: 0 0 16px;
  color: var(--mist);
}

.page-about .ab-home__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .ab-home__list {
  display: grid;
  gap: 1px;
  list-style: none;
  margin: 0;
  padding: 0;
  background: rgba(43, 217, 180, 0.18);
  align-self: start;
  border-radius: var(--radius-s);
  overflow: hidden;
}

.page-about .ab-home__list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(7, 19, 38, 0.72);
  font-size: 14px;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-about .ab-home__list .dp-mono {
  font-size: 12px;
  color: var(--teal);
  letter-spacing: 0.1em;
}

.page-about .ab-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: 20px;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-link {
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s var(--ease-out), color 0.25s var(--ease-out);
}

.page-about .ab-link:hover {
  color: var(--paper);
  border-bottom-color: var(--teal);
}

/* ---------- responsive ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 0.38fr) minmax(0, 0.62fr);
    align-items: start;
  }

  .page-about .ab-origin__mark {
    flex-direction: column;
    align-items: flex-start;
    position: sticky;
    top: 120px;
  }

  .page-about .ab-origin__spark {
    width: 100%;
    flex: none;
  }

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

  .page-about .ab-promise__layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .ab-eco__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-about .ab-home__panel {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
    gap: clamp(40px, 6vw, 84px);
  }

  .page-about .ab-track {
    padding-left: 150px;
  }

  .page-about .ab-track__rail {
    left: 120px;
  }

  .page-about .ab-node {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
    padding-bottom: clamp(36px, 4vw, 56px);
  }

  .page-about .ab-node__year {
    justify-content: flex-end;
    padding-right: 4px;
  }

  .page-about .ab-node__dot {
    left: 114px;
    top: 14px;
  }

  .page-about .ab-node__year .dp-mono {
    font-size: clamp(2.4rem, 3.4vw, 3.2rem);
    color: var(--mist);
    transition: color 0.3s var(--ease-out);
  }

  .page-about .ab-node:hover .ab-node__year .dp-mono {
    color: var(--paper);
  }

  .page-about .ab-team__split {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .ab-band {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .ab-band__item {
    padding: 26px 20px;
  }

  .page-about .ab-promise__layout {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: clamp(36px, 5vw, 64px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-acc__sum,
  .page-about .ab-link,
  .page-about .ab-node__dot,
  .page-about .ab-node__year .dp-mono {
    transition: none;
  }
}