.page-about {
  --about-rail: 208px;
  --about-gap: clamp(28px, 5vw, 60px);
  background: var(--cream);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .container {
  max-width: var(--wrap);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  background: linear-gradient(148deg, var(--turf) 0%, var(--night) 100%);
  color: var(--on-dark);
  padding: clamp(18px, 3vw, 30px) 0 clamp(40px, 6vw, 76px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -25% -12%;
  background: repeating-linear-gradient(102deg, rgba(20, 216, 198, .085) 0 1px, transparent 1px 30px);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(20, 216, 198, .6) 22%, rgba(255, 106, 19, .55) 62%, transparent);
}

.page-about .about-hero .breadcrumb-item {
  color: var(--on-dark-soft);
}

.page-about .about-hero .breadcrumb-item a {
  color: var(--on-dark-soft);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb-item a:hover {
  color: var(--cyan);
}

.page-about .about-hero .breadcrumb-item[aria-current="page"] {
  color: var(--on-dark);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 5vw, 52px);
  align-items: center;
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__copy {
  max-width: 34em;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-hero h1 {
  font-family: var(--font-sans);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.12;
  margin: 0 0 18px;
  color: var(--on-dark);
}

.page-about .lede {
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.72;
  color: var(--on-dark-soft);
  max-width: 40em;
  margin: 0 0 26px;
}

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

.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  padding: 1px;
  background: linear-gradient(160deg, rgba(20, 216, 198, .85), rgba(255, 106, 19, .5) 70%, rgba(20, 216, 198, .2));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 38px), calc(100% - 38px) 100%, 0 100%);
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 37px), calc(100% - 37px) 100%, 0 100%);
  filter: saturate(1.05) contrast(1.02);
}

/* ---------- Body / rail ---------- */
.page-about .about-body {
  padding: clamp(34px, 6vw, 84px) 0 clamp(40px, 6vw, 88px);
  background: var(--cream);
}

.page-about .about-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

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

.page-about .about-rail__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-deep);
  margin: 0 0 12px;
}

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

.page-about .rail-item {
  position: relative;
  flex: 0 0 auto;
}

.page-about .rail-link {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: rgba(10, 90, 99, .05);
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}

.page-about .rail-no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--wine);
  letter-spacing: .04em;
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  background: var(--turf);
  border-color: var(--turf);
  color: var(--on-dark);
}

.page-about .rail-link:hover .rail-no,
.page-about .rail-link:focus-visible .rail-no {
  color: var(--cyan);
}

/* ---------- Flow of chapters ---------- */
.page-about .about-flow {
  min-width: 0;
}

.page-about .about-chapter {
  padding-bottom: clamp(30px, 5vw, 54px);
  margin-bottom: clamp(32px, 5.5vw, 58px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-chapter:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .chapter-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.page-about .about-chapter .chapter-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--on-dark);
  background: var(--wine);
  padding: 5px 11px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}

.page-about .chapter-title {
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.28;
  letter-spacing: -.01em;
  margin: 0;
  color: var(--ink);
  max-width: 24em;
}

.page-about .prose p {
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
  margin: 0 0 16px;
  max-width: 40em;
}

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

.page-about .prose a {
  color: var(--cyan-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .prose a:hover {
  color: var(--orange);
}

/* ---------- Data figures ---------- */
.page-about .about-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-facts .data-figure {
  background: var(--turf);
  color: var(--on-dark);
  padding: 18px 20px 16px;
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 17px), calc(100% - 17px) 100%, 0 100%);
  border-left: 3px solid var(--cyan);
}

.page-about .about-facts .data-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-about .about-facts .data-unit {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--on-dark-soft);
  margin-left: 6px;
}

.page-about .about-facts .data-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-dark-soft);
  margin: 10px 0 0;
}

.page-about .about-facts .data-figure:first-child .data-num {
  color: var(--orange);
}

/* ---------- Split block: grid image + glossary ---------- */
.page-about .about-split {
  margin-top: 26px;
}

.page-about .about-split__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.page-about .about-grid-media {
  margin: 0;
}

.page-about .glossary {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-about .glossary-row {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0 14px 0;
  border-bottom: 1px solid var(--line);
  transition: background .24s var(--ease), padding-left .24s var(--ease);
}

.page-about .glossary-row:hover,
.page-about .glossary-row:focus-within {
  background: rgba(20, 216, 198, .09);
  padding-left: 12px;
}

.page-about .glossary-term {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cyan-deep);
}

.page-about .glossary-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- Flow diagram ---------- */
.page-about .flow {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  counter-reset: flowstep;
}

.page-about .flow-step {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan-deep);
  padding: 16px 18px 18px;
}

.page-about .flow-step::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -19px;
  width: 10px;
  height: 10px;
  border-right: 1px solid var(--cyan-deep);
  border-bottom: 1px solid var(--cyan-deep);
  transform: translateX(-50%) rotate(45deg);
}

.page-about .flow-step:last-child::after {
  display: none;
}

.page-about .flow-title {
  font-size: 16px;
  margin: 0 0 8px;
  color: var(--ink);
  letter-spacing: .01em;
}

.page-about .flow-text {
  font-size: 14px;
  line-height: 1.68;
  color: var(--ink-soft);
  margin: 0;
}

/* ---------- Indigo note ---------- */
.page-about .about-note {
  margin-top: 26px;
  background: var(--indigo);
  color: var(--on-dark);
  padding: 20px 22px 20px 24px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  border-left: 3px solid var(--amber);
}

.page-about .about-note__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--amber);
  margin: 0 0 10px;
}

.page-about .about-note p {
  font-size: 15px;
  line-height: 1.74;
  margin: 0;
  color: var(--on-dark);
  max-width: 42em;
}

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

.page-about .about-note a:hover {
  color: var(--amber);
}

/* ---------- Team media ---------- */
.page-about .about-team-media {
  margin: 24px 0 0;
}

/* ---------- Tabs ---------- */
.page-about .about-tabs {
  margin-top: 30px;
}

.page-about .about-tabs .tablist {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-tabs .tab {
  appearance: none;
  background: none;
  border: 0;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  padding: 12px 14px;
  color: var(--ink-soft);
  transition: color .24s var(--ease), background .24s var(--ease);
}

.page-about .about-tabs .tab:hover {
  color: var(--ink);
  background: rgba(10, 90, 99, .06);
}

.page-about .about-tabs .tab[aria-selected="true"] {
  color: var(--orange);
}

.page-about .about-tabs .tab-indicator {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  background: var(--orange);
  transition: transform .24s var(--ease), width .24s var(--ease);
}

.page-about .about-tabs .tabpanel {
  padding: 20px 0 0;
}

.page-about .about-tabs .tabpanel[hidden] {
  display: none;
}

.page-about .about-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-soft);
  max-width: 46em;
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ---------- Timeline ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-timeline .timeline-item {
  position: relative;
  padding: 0 0 26px 22px;
}

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

.page-about .about-timeline .timeline-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-about .timeline-mark {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--wine);
  background: rgba(110, 31, 58, .1);
  padding: 3px 9px;
  margin-bottom: 8px;
}

.page-about .timeline-title {
  font-size: 17px;
  margin: 0 0 6px;
  color: var(--ink);
}

.page-about .timeline-text {
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-soft);
  margin: 0;
  max-width: 44em;
}

/* ---------- Closing CTA ---------- */
.page-about .about-cta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: center;
  margin-top: 32px;
  padding: 22px 24px;
  background: var(--turf);
  color: var(--on-dark);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-cta__title {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--on-dark);
}

.page-about .about-cta__desc {
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
  color: var(--on-dark-soft);
  max-width: 44em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .glossary-row {
    grid-template-columns: minmax(130px, .3fr) minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: clamp(32px, 4.5vw, 64px);
    align-items: start;
  }

  .page-about .about-hero__visual {
    margin-top: 26px;
  }

  .page-about .about-split__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: 32px;
  }

  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px 32px;
    counter-reset: none;
  }

  .page-about .flow-step::after {
    left: auto;
    right: -22px;
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
  }

  .page-about .flow-step:nth-child(3n)::after {
    display: none;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(36px, 4vw, 68px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 128px;
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .rail-item {
    flex: none;
  }

  .page-about .rail-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 9px;
    height: 1px;
    background: var(--line-strong);
  }

  .page-about .rail-link {
    width: 100%;
    padding: 11px 8px 11px 22px;
    border: 0;
    background: none;
    clip-path: none;
    font-size: 14px;
  }

  .page-about .rail-link:hover,
  .page-about .rail-link:focus-visible {
    background: rgba(20, 216, 198, .12);
    color: var(--ink);
  }

  .page-about .rail-link:hover .rail-no,
  .page-about .rail-link:focus-visible .rail-no {
    color: var(--orange);
  }

  .page-about .chapter-title {
    max-width: 26em;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero h1 {
    font-size: 60px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail-link,
  .page-about .glossary-row,
  .page-about .about-tabs .tab,
  .page-about .about-tabs .tab-indicator {
    transition: none;
  }
}