.page-about {
  --about-line: 1px solid var(--grid-line);
  background: var(--ink-void);
  color: var(--chalk);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-hero {
  position: relative;
  padding-block: 20px 0;
  background: linear-gradient(180deg, var(--ink-void) 0%, var(--pitch-900) 68%, var(--ink-void) 100%);
  border-bottom: var(--about-line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(36, 53, 45, 0.9) 1px, transparent 1px);
  background-size: 96px 100%;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb {
  font-size: 12px;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0 0 20px;
  color: var(--slate);
}

.page-about .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--grid-line);
}

.page-about .breadcrumb__list a {
  color: var(--signal-cyan);
  text-decoration: none;
}

.page-about .breadcrumb__list a:hover {
  text-decoration: underline;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: 8px;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--signal-cyan);
  margin: 0;
  text-transform: none;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 6vw, 5.4rem);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  color: var(--chalk);
  overflow-wrap: break-word;
}

.page-about .about-hero__title span {
  display: block;
  color: var(--signal-cyan);
}

.page-about .about-hero__text {
  margin: 18px 0 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .about-ledger {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid-line);
  border: var(--about-line);
}

.page-about .about-ledger li {
  background: var(--ink-void);
  padding: 14px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-ledger__num {
  font-size: clamp(1.5rem, 4.4vw, 2.1rem);
  font-weight: 500;
  line-height: 1;
  color: var(--signal-cyan);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-ledger__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--slate);
}

.page-about .about-shot {
  position: relative;
  margin: 32px 0 0;
  border: var(--about-line);
  border-bottom: 0;
  background: var(--pitch-700);
}

.page-about .about-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.92) brightness(0.92);
}

.page-about .about-shot figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 28px 14px 12px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--chalk);
  background: linear-gradient(0deg, rgba(11, 15, 13, 0.94), rgba(11, 15, 13, 0));
}

.page-about .about-body {
  padding-block: 48px;
  background: var(--pitch-900);
  border-bottom: var(--about-line);
}

.page-about .about-body__inner {
  display: grid;
  gap: 36px;
}

.page-about .about-rail {
  border-top: 2px solid var(--signal-cyan);
  padding-top: 16px;
  min-width: 0;
}

.page-about .about-rail__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--chalk);
}

.page-about .about-rail__list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.page-about .about-rail__list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 9px;
  border-bottom: var(--about-line);
}

.page-about .about-rail__list dt {
  font-size: 13px;
  color: var(--slate);
}

.page-about .about-rail__list dd {
  margin: 0;
  font-size: 13px;
  color: var(--chalk);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-about .about-rail__note {
  margin: 16px 0 18px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
  padding-left: 12px;
  border-left: 2px solid var(--amber);
}

.page-about .about-rail__cta {
  width: 100%;
  text-align: center;
}

.page-about .about-flow {
  min-width: 0;
  display: grid;
  gap: 40px;
}

.page-about .about-sec {
  border-top: var(--about-line);
  padding-top: 28px;
}

.page-about .about-flow > .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  margin-bottom: 16px;
}

.page-about .about-sec__kicker {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--signal-cyan);
}

.page-about .about-sec__title {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--chalk);
  overflow-wrap: break-word;
}

.page-about .about-sec__note {
  margin: 0;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

.page-about .about-text {
  margin: 0 0 14px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

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

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 16px 0 16px 18px;
  border-left: 2px solid var(--signal-cyan);
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(1.15rem, 2.6vw, 1.6rem);
  line-height: 1.55;
  color: var(--chalk);
  max-width: 22em;
}

/* 角色卡 */
.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.page-about .role-card {
  position: relative;
  background: var(--paper);
  color: var(--ink-void);
  border: 1px solid var(--ink-void);
  padding: 18px 16px 14px;
  box-shadow: var(--shadow-paper);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .role-card::before {
  content: "";
  position: absolute;
  top: 6px;
  right: 6px;
  width: 14px;
  height: 14px;
  border-top: 1px solid var(--cyan-deep);
  border-right: 1px solid var(--cyan-deep);
  transition: border-color 0.2s var(--ease);
}

.page-about .role-card:hover,
.page-about .role-card:focus-within {
  border-color: var(--amber-deep);
  transform: translateY(-2px);
}

.page-about .role-card:hover::before,
.page-about .role-card:focus-within::before {
  border-color: var(--amber-deep);
}

.page-about .role-card__no {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan-deep);
}

.page-about .role-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-void);
}

.page-about .role-card__count {
  margin: 2px 0 10px;
  font-size: 12px;
  color: var(--slate-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .role-card__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-deep);
}

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

.page-about .role-card details {
  border-top: 1px dashed rgba(78, 95, 87, 0.45);
  padding-top: 10px;
}

.page-about .role-card summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--cyan-deep);
}

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

.page-about .role-card summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-about .role-card details[open] summary::after {
  content: "–";
}

.page-about .role-card details p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-deep);
}

/* 复核三步 */
.page-about .about-verify {
  display: grid;
  gap: 24px;
  margin-top: 20px;
}

.page-about .about-verify__steps {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.page-about .step {
  border: var(--about-line);
  border-left: 2px solid var(--grid-line);
  background: rgba(23, 69, 58, 0.42);
  padding: 14px 16px;
  transition: border-color 0.18s var(--ease);
}

.page-about .step[open] {
  border-left-color: var(--signal-cyan);
}

.page-about .step summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-about .step__no {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--signal-cyan);
}

.page-about .step__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-about .step__list {
  margin: 12px 0 0;
  padding: 0 0 0 16px;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .step__list li {
  position: relative;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .step__list li::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 9px;
  width: 6px;
  height: 1px;
  background: var(--signal-cyan);
}

.page-about .about-link {
  justify-self: start;
  display: inline-block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--signal-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 240, 192, 0.4);
  padding-bottom: 2px;
}

.page-about .about-link:hover {
  border-bottom-color: var(--signal-cyan);
}

.page-about .about-verify__fig {
  position: relative;
  margin: 0;
  border: var(--about-line);
  background: var(--pitch-700);
  align-self: start;
}

.page-about .about-verify__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(0.9) brightness(0.9);
}

.page-about .about-verify__fig figcaption {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--slate);
  border-top: var(--about-line);
}

/* 赛季带 */
.page-about .about-seasons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1px;
  background: var(--grid-line);
  border: var(--about-line);
  margin-top: 20px;
}

.page-about .season {
  background: var(--ink-void);
  padding: 14px 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-top: 2px solid transparent;
  min-width: 0;
  transition: background 0.18s var(--ease);
}

.page-about .season:hover {
  background: var(--pitch-900);
}

.page-about .season__no {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--slate);
}

.page-about .season__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--chalk);
  line-height: 1.25;
}

.page-about .season__text {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--slate);
}

.page-about .season.is-current {
  background: var(--pitch-900);
  border-top-color: var(--signal-cyan);
}

.page-about .season.is-current .season__no {
  color: var(--signal-cyan);
}

.page-about .season.is-current .season__name {
  color: var(--signal-cyan);
}

/* 合作 */
.page-about .about-partners {
  display: grid;
  gap: 20px;
  margin-top: 18px;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--grid-line);
  border: var(--about-line);
  align-self: start;
}

.page-about .about-partners__list li {
  background: var(--ink-void);
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-partners__tag {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--signal-cyan);
  border: 1px solid rgba(79, 240, 192, 0.35);
  padding: 1px 6px;
  white-space: nowrap;
}

.page-about .about-partners__cta {
  margin-top: 22px;
}

/* 对接区 */
.page-about .about-handoff {
  background: var(--paper);
  color: var(--ink-void);
  padding-block: 48px;
}

.page-about .about-handoff__inner {
  display: grid;
  gap: 28px;
}

.page-about .about-handoff__eyebrow {
  color: var(--cyan-deep);
}

.page-about .about-handoff__title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 12px 0 16px;
  color: var(--ink-void);
}

.page-about .about-handoff__text {
  margin: 0 0 14px;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate-deep);
}

.page-about .about-handoff__contact {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(78, 95, 87, 0.22);
  border-top: 1px solid rgba(78, 95, 87, 0.35);
  border-bottom: 1px solid rgba(78, 95, 87, 0.35);
}

.page-about .about-handoff__contact li {
  background: var(--paper);
  padding: 11px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  font-size: 14px;
}

.page-about .about-handoff__contact span {
  min-width: 68px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan-deep);
}

.page-about .about-handoff__contact strong {
  font-weight: 500;
  color: var(--ink-void);
  overflow-wrap: anywhere;
}

.page-about .about-handoff__note {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate-deep);
}

.page-about .about-handoff__actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
}

.page-about .about-handoff .about-link {
  color: var(--cyan-deep);
  border-bottom-color: rgba(11, 127, 99, 0.45);
  margin-top: 0;
}

.page-about .about-handoff .about-link:hover {
  border-bottom-color: var(--cyan-deep);
}

.page-about .about-handoff__fig {
  margin: 0;
  border: 1px solid rgba(78, 95, 87, 0.4);
  background: var(--pitch-900);
  position: relative;
}

.page-about .about-handoff__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: brightness(0.86) saturate(0.9);
}

.page-about .about-handoff__fig figcaption {
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--slate);
  background: var(--pitch-900);
}

.page-about :focus-visible {
  outline: 2px solid var(--signal-cyan);
  outline-offset: 2px;
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding-block: 28px 0;
  }

  .page-about .about-hero__text {
    font-size: 16px;
  }

  .page-about .about-ledger {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-shot figcaption {
    font-size: 13px;
    padding: 36px 20px 14px;
  }

  .page-about .about-body {
    padding-block: 64px;
  }

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

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .about-handoff {
    padding-block: 64px;
  }

  .page-about .about-handoff__contact li {
    font-size: 14.5px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 40px;
    margin-top: 16px;
    padding-bottom: 8px;
  }

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

  .page-about .about-body__inner {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 24px;
  }

  .page-about .about-verify {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-flow {
    gap: 52px;
  }

  .page-about .about-handoff__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-about .about-seasons {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }

  .page-about .about-hero__text {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .season,
  .page-about .step {
    transition: none;
  }

  .page-about .role-card:hover,
  .page-about .role-card:focus-within {
    transform: none;
  }
}