.page-about {
  position: relative;
  background: var(--ink-950);
  color: var(--paper-100);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 72px) 0 clamp(32px, 5vw, 64px);
  background:
    radial-gradient(120% 90% at 92% 8%, rgba(53, 232, 200, 0.08), transparent 55%),
    linear-gradient(180deg, rgba(107, 18, 38, 0.42) 0%, rgba(10, 9, 12, 0) 72%);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -60px;
  width: 46%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--line-copper), transparent);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    gap: clamp(32px, 4vw, 64px);
  }
}

.page-about .about-hero__copy > * + * {
  margin-top: 0.9em;
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(1.75rem, 5.4vw, 3.25rem);
  line-height: 1.16;
  letter-spacing: -0.012em;
  font-weight: 800;
  color: var(--paper-100);
  max-width: 22ch;
}

.page-about .about-hero .lede {
  margin-top: 0.9em;
  color: var(--copper-200);
  font-size: clamp(0.9375rem, 1.4vw, 1.0625rem);
  line-height: 1.75;
  max-width: 42ch;
}

.page-about .about-hero__note {
  margin: 1.1em 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--copper-500);
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-about .about-hero__media {
  margin: 0;
}

/* ---------- Layout: rail + .page-about ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 72px);
  }
}

/* ---------- Rail ---------- */
.page-about .about-index {
  align-self: start;
}

@media (min-width: 900px) {
  .page-about .about-index {
    position: sticky;
    top: 108px;
  }
}

.page-about .about-index__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  counter-reset: none;
}

.page-about .about-index .index-rail__link {
  display: inline-block;
  font-size: 0.8125rem;
  line-height: 1.4;
  color: var(--slate-400);
  text-decoration: none;
  transition: color 160ms ease-out;
}

.page-about .about-index .index-rail__link:hover,
.page-about .about-index .index-rail__link:focus-visible {
  color: var(--copper-200);
}

@media (min-width: 900px) {
  .page-about .about-index__list {
    display: block;
    border-top: none;
    padding-top: 0;
  }
  .page-about .about-index__list .index-rail__item + .index-rail__item {
    margin-top: 2px;
  }
  .page-about .about-index .index-rail__link {
    padding: 7px 0 7px 12px;
    border-left: 2px solid transparent;
    font-size: 0.8125rem;
  }
  .page-about .about-index .index-rail__link:hover,
  .page-about .about-index .index-rail__link:focus-visible {
    border-left-color: var(--copper-500);
  }
}

/* ---------- Chapters ---------- */
.page-about .about-main {
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 6vw, 92px);
  min-width: 0;
}

.page-about .about-chapter {
  position: relative;
  min-width: 0;
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    border-left: 1px solid var(--line-soft);
    padding-left: clamp(16px, 2vw, 32px);
  }
}

.page-about .about-chapter__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 22px;
}

.page-about .about-chapter__no {
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--copper-500);
  border: 1px solid var(--line-copper);
  padding: 2px 8px;
  flex: none;
}

.page-about .about-chapter h2 {
  margin: 0;
  font-size: clamp(1.2rem, 3.2vw, 1.875rem);
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-about .about-chapter__body.prose p {
  margin: 0 0 0.9em;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper-100);
}

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

.page-about .about-chapter__body.prose a {
  color: var(--copper-200);
  text-decoration: none;
  border-bottom: 1px solid var(--line-copper);
  transition: color 160ms ease-out, border-color 160ms ease-out;
}

.page-about .about-chapter__body.prose a:hover,
.page-about .about-chapter__body.prose a:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.page-about .about-chapter__body.prose > p.prose {
  margin: 0 0 0.9em;
}

/* ---------- Team ---------- */
.page-about .about-team {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

@media (min-width: 700px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team__item {
  background: var(--ink-800);
  padding: 22px 20px 24px;
  min-width: 0;
  transition: background 160ms ease-out, box-shadow 160ms ease-out;
}

.page-about .about-team__item:hover {
  background: #1c1a22;
  box-shadow: inset 0 0 0 1px var(--line-copper);
}

.page-about .about-team__count {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4.6vw, 2.75rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan-400);
}

.page-about .about-team__count .mono {
  font-size: inherit;
  line-height: 1;
}

.page-about .about-team__unit {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--slate-400);
}

.page-about .about-team__role {
  margin: 14px 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--copper-200);
  letter-spacing: 0.02em;
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--slate-400);
}

/* ---------- Flow ---------- */
.page-about .about-flow {
  margin-top: 26px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 900px) {
  .page-about .about-flow {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
    gap: 36px;
  }
}

.page-about .about-flow__media {
  margin: 0;
  position: relative;
}

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

.page-about .about-flow__step {
  position: relative;
  padding: 14px 16px 14px 54px;
  border-left: 1px solid var(--line-copper);
  background: linear-gradient(90deg, rgba(201, 135, 60, 0.09), rgba(201, 135, 60, 0) 74%);
  transition: background 180ms ease-out, transform 180ms ease-out;
}

.page-about .about-flow__step:hover {
  background: linear-gradient(90deg, rgba(201, 135, 60, 0.2), rgba(201, 135, 60, 0) 82%);
  transform: translateX(4px);
}

.page-about .about-flow__idx {
  position: absolute;
  left: 14px;
  top: 16px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--copper-500);
}

.page-about .about-flow__step h3 {
  margin: 0 0 6px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--paper-100);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--slate-400);
}

/* ---------- Column saga ---------- */
.page-about .about-columns__media {
  margin: 22px 0 26px;
}

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

.page-about .about-saga .timeline__item {
  position: relative;
  padding-left: 30px;
  padding-bottom: 24px;
}

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

.page-about .about-saga .timeline__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 14px;
  bottom: 0;
  width: 1px;
  background: var(--line-soft);
}

.page-about .about-saga .timeline__item:last-child::before {
  display: none;
}

.page-about .about-saga .timeline__marker {
  position: absolute;
  left: 0;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--copper-500);
  box-shadow: 0 0 0 3px rgba(201, 135, 60, 0.16);
}

.page-about .about-saga__when {
  display: inline-block;
  margin: 0 0 6px;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--cyan-400);
}

.page-about .about-saga .timeline__body h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper-100);
  letter-spacing: 0.01em;
}

.page-about .about-saga .timeline__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 0.875rem;
  line-height: 1.78;
  color: var(--slate-400);
}

.page-about .about-saga__tail {
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--copper-500);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--copper-200);
  max-width: 62ch;
}

/* ---------- Season phases ---------- */
.page-about .about-season {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  margin: 24px 0 24px;
}

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

.page-about .about-season__phase {
  background: var(--ink-800);
  padding: 22px 20px 24px;
  min-width: 0;
  position: relative;
}

.page-about .about-season__phase:nth-child(1) { box-shadow: inset 0 2px 0 var(--wine-400); }
.page-about .about-season__phase:nth-child(2) { box-shadow: inset 0 2px 0 var(--copper-500); }
.page-about .about-season__phase:nth-child(3) { box-shadow: inset 0 2px 0 var(--cyan-400); }

.page-about .about-season__label {
  display: inline-block;
  margin: 0 0 12px;
  padding-bottom: 3px;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--copper-200);
  border-bottom: 1px solid var(--line-copper);
}

.page-about .about-season__phase h3 {
  margin: 0 0 8px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--paper-100);
}

.page-about .about-season__phase p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--slate-400);
}

/* ---------- Partner list ---------- */
.page-about .about-partner {
  margin: 22px 0 24px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-partner__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

@media (min-width: 720px) {
  .page-about .about-partner__row {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }
}

.page-about .about-partner dt {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--copper-200);
  letter-spacing: 0.03em;
  position: relative;
  padding-left: 14px;
}

.page-about .about-partner dt::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--copper-500);
}

.page-about .about-partner dd {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.78;
  color: var(--slate-400);
  max-width: 62ch;
}

/* ---------- Narrow-screen safety ---------- */
@media (max-width: 480px) {
  .page-about .about-hero h1 {
    font-size: 1.6rem;
  }
  .page-about .about-team__item,
  .page-about .about-season__phase {
    padding-left: 16px;
    padding-right: 16px;
  }
  .page-about .about-flow__step {
    padding-left: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__step,
  .page-about .about-team__item {
    transition: none;
  }
  .page-about .about-flow__step:hover {
    transform: none;
  }
}