.page-about {
  --about-rail-w: 112px;
  --about-flag: linear-gradient(90deg,
      var(--sky) 0 20%,
      var(--snow) 20% 40%,
      var(--flame) 40% 60%,
      var(--barley) 60% 80%,
      var(--saffron) 80% 100%);
  background: var(--snow);
  padding-block: clamp(20px, 4vw, 36px) clamp(48px, 8vw, 96px);
}

.page-about .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
}

/* ---------- Hero ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 52px) clamp(20px, 4vw, 48px) clamp(24px, 4vw, 44px);
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, var(--snow) 0%, var(--cloud) 100%);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.page-about .about-hero__flag {
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--about-flag);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.6vw, 3.6rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--deep);
}

.page-about .about-hero__lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 38em;
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.4vw, 1.0625rem);
  line-height: 1.8;
  color: var(--deep);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(24px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-hero__stat {
  position: relative;
  background: var(--snow);
  padding: 20px 16px 16px;
}

.page-about .about-hero__stat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background: var(--sky);
}

.page-about .about-hero__stat:nth-child(2)::before { background: var(--flame); }
.page-about .about-hero__stat:nth-child(3)::before { background: var(--barley); }
.page-about .about-hero__stat:nth-child(4)::before { background: var(--gold); }

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.2vw, 2.35rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--deep);
}

.page-about .about-hero__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: .8125rem;
  line-height: 1.55;
  color: var(--slate);
}

/* ---------- Layout: rail + panels ---------- */

.page-about .about-layout {
  margin-top: clamp(32px, 6vw, 64px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .about-rail {
  margin-bottom: clamp(28px, 4vw, 40px);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__item {
  flex: 0 0 auto;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--snow);
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--slate);
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-about .about-rail__num {
  color: var(--deep);
  font-weight: 700;
}

.page-about .about-rail__text {
  font-family: var(--font-body);
  font-size: .75rem;
  letter-spacing: .04em;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--flame);
  border-color: var(--flame);
  background: rgba(244, 68, 30, .07);
}

.page-about .about-panels {
  min-width: 0;
}

/* ---------- Chapter panels ---------- */

.page-about .about-chapter {
  position: relative;
  padding-top: clamp(28px, 4vw, 44px);
}

.page-about .about-chapter::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--about-flag);
}

.page-about .about-chapter .panel__lead {
  max-width: 40em;
}

.page-about .chapter-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-about .chapter-split .media {
  margin: 0;
}

.page-about .chapter-split--flip .media {
  order: -1;
}

.page-about .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
}

.page-about .media__caption {
  margin-top: 10px;
  font-family: var(--font-body);
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--slate);
  border-left: 3px solid var(--sky-light);
  padding-left: 10px;
}

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

/* ---------- Principles ---------- */

.page-about .principle-grid {
  margin-top: clamp(18px, 3vw, 28px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .principle {
  border: 1px solid var(--line);
  border-left: 4px solid var(--sky);
  background: var(--snow);
  padding: 18px 18px 16px;
  box-shadow: 6px 6px 0 rgba(12, 34, 51, .06);
  transition: border-color .2s ease, box-shadow .2s ease;
}

.page-about .principle[open] {
  border-left-color: var(--flame);
  box-shadow: 6px 6px 0 rgba(244, 68, 30, .16);
}

.page-about .principle__summary {
  display: block;
  cursor: pointer;
  list-style: none;
}

.page-about .principle__summary::-webkit-details-marker { display: none; }
.page-about .principle__summary::marker { content: ""; }

.page-about .principle__no {
  display: block;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--slate);
}

.page-about .principle__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.375rem);
  font-weight: 800;
  color: var(--deep);
}

.page-about .principle__hint {
  display: inline-block;
  margin-top: 10px;
  padding-bottom: 2px;
  font-family: var(--font-body);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--sky);
  border-bottom: 1px solid currentColor;
}

.page-about .principle[open] .principle__hint {
  color: var(--flame);
}

.page-about .principle__body {
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--deep);
}

/* ---------- Timeline ---------- */

.page-about .timeline {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--sky) 0%, var(--sky-light) 55%, var(--flame) 100%);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(22px, 3.4vw, 34px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 10px;
  width: 10px;
  height: 10px;
  background: var(--snow);
  border: 2px solid var(--sky);
  transform: rotate(45deg);
}

.page-about .timeline__item:nth-child(2)::before { border-color: var(--barley); }
.page-about .timeline__item:nth-child(3)::before { border-color: var(--gold); }
.page-about .timeline__item:nth-child(4)::before { border-color: var(--flame); }

.page-about .timeline__year {
  display: inline-block;
  padding: 4px 16px 4px 12px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 100%, 0 100%);
  background: var(--deep);
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .timeline__body {
  margin-top: 12px;
}

.page-about .timeline__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  font-weight: 800;
  color: var(--deep);
}

.page-about .timeline__body p {
  margin: 8px 0 0;
  max-width: 38em;
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .timeline__more a {
  color: var(--sky);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .timeline__more a:hover,
.page-about .timeline__more a:focus-visible {
  color: var(--flame);
}

/* ---------- Team ---------- */

.page-about .team-grid {
  margin-top: clamp(18px, 3vw, 28px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .team-card {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid var(--line);
  background: var(--cloud);
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--deep);
}

.page-about .team-card__name {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--sky);
}

.page-about .team-card p {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: .875rem;
  line-height: 1.75;
  color: var(--deep);
}

.page-about .team-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
}

.page-about .team-note {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .team-note a {
  color: var(--sky);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .team-note a:hover,
.page-about .team-note a:focus-visible {
  color: var(--flame);
}

/* ---------- Flow ---------- */

.page-about .flow {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .flow__step {
  padding: 16px 14px 14px;
  background: var(--snow);
  border: 1px solid var(--line);
  border-top: 3px solid var(--sky);
}

.page-about .flow__step:nth-child(1) { border-top-color: var(--sky); }
.page-about .flow__step:nth-child(2) { border-top-color: var(--barley); }
.page-about .flow__step:nth-child(3) { border-top-color: var(--gold); }
.page-about .flow__step:nth-child(4) { border-top-color: var(--flame); }
.page-about .flow__step:nth-child(5) { border-top-color: var(--purple); }
.page-about .flow__step:nth-child(6) { border-top-color: var(--deep); }

.page-about .flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .12em;
  color: var(--slate);
}

.page-about .flow__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--deep);
}

.page-about .flow__step p {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .flow-note {
  margin: clamp(18px, 2.8vw, 26px) 0 0;
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .flow-note a {
  color: var(--sky);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .flow-note a:hover,
.page-about .flow-note a:focus-visible {
  color: var(--flame);
}

/* ---------- Partners ---------- */

.page-about .partner-list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .partner-item {
  padding: 20px 18px;
  border: 1px solid var(--line);
  background: var(--snow);
  box-shadow: 8px 8px 0 rgba(12, 34, 51, .05);
}

.page-about .partner-item__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--deep);
}

.page-about .partner-item p {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: .875rem;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .partner-foot {
  margin-top: clamp(20px, 3vw, 30px);
  padding: 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  background: var(--cloud);
  border-left: 4px solid var(--flame);
}

.page-about .partner-foot__num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--flame);
}

.page-about .partner-foot__text {
  flex: 1 1 240px;
  margin: 0;
  font-family: var(--font-body);
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--deep);
}

.page-about .partner-foot__text a {
  color: var(--sky);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .partner-foot__text a:hover,
.page-about .partner-foot__text a:focus-visible {
  color: var(--flame);
}

/* ---------- Commitments ---------- */

.page-about .about-chapter--closing {
  background: var(--snow);
}

.page-about .commit-grid {
  margin-top: clamp(18px, 3vw, 28px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .commit {
  padding: 20px 18px;
  border: 1px solid var(--line);
  background: var(--cloud);
}

.page-about .commit:last-child {
  background: var(--deep);
  border-color: var(--deep);
}

.page-about .commit__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--deep);
}

.page-about .commit:last-child .commit__title {
  color: var(--snow);
}

.page-about .commit p {
  margin: 10px 0 0;
  font-family: var(--font-body);
  font-size: .875rem;
  line-height: 1.8;
  color: var(--deep);
}

.page-about .commit:last-child p {
  color: rgba(248, 250, 251, .82);
}

.page-about .commit__actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .commit:last-child .btn--outline {
  color: var(--snow);
  border-color: rgba(248, 250, 251, .5);
}

.page-about .commit:last-child .btn--outline:hover,
.page-about .commit:last-child .btn--outline:focus-visible {
  border-color: var(--snow);
}

/* ---------- Responsive ---------- */

@media (min-width: 620px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-about .chapter-split {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .chapter-split--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-about .chapter-split--flip .media {
    order: 0;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    margin-bottom: 0;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-rail__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding: 10px 12px;
    border-color: transparent;
    border-left: 2px solid var(--line-soft);
  }

  .page-about .about-rail__num {
    font-size: 1rem;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--flame);
    background: rgba(244, 68, 30, .07);
  }

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

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

@media (min-width: 1080px) {
  .page-about .team-grid,
  .page-about .partner-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .principle {
    transition: none;
  }
}