.page-about {
  --about-idx: 168px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 24px 0 44px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(166, 64, 42, 0.22), rgba(166, 64, 42, 0) 70%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 8.4vw, 92px);
  line-height: 0.94;
  letter-spacing: -0.025em;
}

.page-about .about-hero__sub {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .hero-board {
  position: relative;
  background: var(--night);
  color: var(--paper);
  padding: 18px 20px 20px;
  border-top: 3px solid var(--ember);
}

.page-about .hero-board::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 44px;
  height: 44px;
  background: var(--paper);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.page-about .hero-board__label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-invert-soft);
}

.page-about .hero-board .status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ember);
}

.page-about .hero-board__rows {
  margin: 16px 0 0;
  display: grid;
  gap: 0;
}

.page-about .hero-board__rows > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-invert);
}

.page-about .hero-board__rows > div:last-child {
  border-bottom: 0;
  padding-bottom: 6px;
}

.page-about .hero-board__rows dt {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-invert-soft);
}

.page-about .hero-board__rows dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--ember);
}

/* ---------- 我们做什么 ---------- */
.page-about .what-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .what-row {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 22px 12px 22px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color var(--dur) var(--ease);
}

.page-about .what-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--ember);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-about .what-row:hover,
.page-about .what-row:focus-within {
  background: rgba(239, 229, 216, 0.6);
}

.page-about .what-row:hover::before,
.page-about .what-row:focus-within::before {
  transform: scaleY(1);
}

.page-about .what-row__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--clay);
  padding-top: 3px;
}

.page-about .what-row__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-about .what-row__text {
  margin: 8px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .what-row__link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ember-ink);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease);
}

.page-about .what-row__link:hover {
  color: var(--clay-deep);
}

/* ---------- 横向标尺 ---------- */
.page-about .ruler-band {
  padding: 0;
  margin: 40px 0 0;
}

.page-about .about-ruler {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding-top: 10px;
  border-top: 3px solid var(--clay);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: var(--graphite);
  overflow-x: auto;
}

.page-about .about-ruler span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.page-about .about-ruler span::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clay);
}

/* ---------- 时间线 ---------- */
.page-about .about-archive {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about .year-rail__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-about .year-rail__list {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0 0 4px;
  overflow-x: auto;
}

.page-about .year-rail__link {
  display: block;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--graphite);
  text-decoration: none;
  border-left: 2px solid transparent;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .year-rail__link:hover,
.page-about .year-rail__link:focus-visible {
  color: var(--ink);
  border-left-color: var(--ember);
}

.page-about .year-entries {
  position: relative;
  padding-left: 26px;
}

.page-about .year-entries::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(to bottom, var(--clay), rgba(166, 64, 42, 0.16));
}

.page-about .year-entry {
  position: relative;
  padding-bottom: 34px;
  scroll-margin-top: 80px;
}

.page-about .year-entry:last-of-type {
  padding-bottom: 0;
}

.page-about .year-entry::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 16px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-about .year-entry__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(38px, 6.4vw, 72px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--clay);
}

.page-about .year-entry__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.page-about .year-entry__text {
  margin: 8px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .year-entry__tag {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--clay);
  border: 1px solid rgba(166, 64, 42, 0.42);
}

.page-about .entry-figure {
  margin: 4px 0 32px;
}

.page-about .entry-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-left: 3px solid var(--clay);
}

.page-about .entry-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 32px;
}

.page-about .team-lead {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .team-bars {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .team-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-bar:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-about .team-bar__label {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .team-bar__num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--clay);
  text-align: right;
}

.page-about .team-bar__track {
  grid-column: 1 / -1;
  display: block;
  height: 8px;
  background: rgba(20, 24, 27, 0.09);
  position: relative;
}

.page-about .team-bar__fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: var(--clay);
}

.page-about .team-bar:nth-child(1) .team-bar__fill { width: 37.5%; }
.page-about .team-bar:nth-child(2) .team-bar__fill { width: 25%; }
.page-about .team-bar:nth-child(3) .team-bar__fill { width: 25%; background: var(--clay-deep); }
.page-about .team-bar:nth-child(4) .team-bar__fill { width: 12.5%; background: var(--ember); }

.page-about .team-bar__note {
  grid-column: 1 / -1;
  font-size: 13px;
  line-height: 1.7;
  color: var(--graphite);
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.page-about .team-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- 覆盖 ---------- */
.page-about .coverage {
  position: relative;
  overflow: hidden;
  background: var(--sand);
  padding: 28px 20px 30px;
}

.page-about .coverage__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.14;
  filter: saturate(0.85);
  pointer-events: none;
}

.page-about .coverage__grid {
  position: relative;
  display: grid;
  gap: 24px;
}

.page-about .coverage__lead {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .coverage__more {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .coverage__more a {
  color: var(--ember-ink);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .coverage__more a:hover {
  color: var(--clay-deep);
}

.page-about .city-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(20, 24, 27, 0.14);
  border: 1px solid rgba(20, 24, 27, 0.14);
}

.page-about .city {
  display: grid;
  gap: 3px;
  padding: 12px 14px;
  background: var(--paper);
  transition: background-color var(--dur) var(--ease);
}

.page-about .city:hover,
.page-about .city:focus-within {
  background: var(--mist);
}

.page-about .city__name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .city__tags {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--graphite);
  opacity: 0.68;
  transition: opacity var(--dur) var(--ease);
}

.page-about .city:hover .city__tags,
.page-about .city:focus-within .city__tags {
  opacity: 1;
}

/* ---------- 赛季成绩 ---------- */
.page-about .about-season {
  background: var(--pine);
  color: var(--paper);
}

.page-about .about-season .eyebrow {
  color: var(--volt);
}

.page-about .about-season__title {
  color: var(--paper);
}

.page-about .season-stats {
  display: grid;
  gap: 22px;
  margin-top: 30px;
}

.page-about .season-stat {
  display: grid;
  gap: 6px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-invert);
}

.page-about .season-stat__value {
  font-family: var(--font-mono);
  font-size: clamp(40px, 7vw, 64px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--ember);
}

.page-about .season-stat__label {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--text-invert-soft);
}

.page-about .about-season__note {
  margin: 30px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-invert-soft);
}

/* ---------- 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .partner {
  background: var(--paper);
  padding: 24px 20px;
  transition: background-color var(--dur) var(--ease);
}

.page-about .partner:hover {
  background: var(--sand);
}

.page-about .partner h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about .partner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .partner__link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ember-ink);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease);
}

.page-about .partner__link:hover {
  color: var(--clay-deep);
}

.page-about .partner__num {
  display: block;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ember-ink);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: 48px;
  padding: 24px 22px 26px;
  background: var(--sand);
  border-left: 3px solid var(--clay);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
}

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

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

@media (min-width: 720px) {
  .page-about .about-hero__sub {
    font-size: 18px;
  }

  .page-about .about-ruler {
    font-size: 14px;
  }

  .page-about .what-row__title {
    font-size: 22px;
  }

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

  .page-about .year-entry__title {
    font-size: 22px;
  }

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

  .page-about .coverage {
    padding: 40px 36px 44px;
  }
}

@media (min-width: 780px) {
  .page-about .season-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .season-stat {
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-about .season-stat + .season-stat {
    padding-left: 32px;
    border-left: 1px solid var(--line-invert);
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 28px 32px;
  }
}

@media (min-width: 860px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 28px 0 56px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 48px;
    align-items: end;
    margin-top: 28px;
  }

  .page-about .about-archive {
    grid-template-columns: var(--about-idx) minmax(0, 1fr);
    gap: 56px;
    margin-top: 36px;
  }

  .page-about .year-rail {
    position: sticky;
    top: 32px;
    align-self: start;
  }

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

  .page-about .year-rail__link {
    padding: 8px 12px;
    font-size: 15px;
  }

  .page-about .year-entries {
    padding-left: 30px;
  }

  .page-about .year-entry::before {
    left: -30px;
  }
}

@media (min-width: 940px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 56px;
    align-items: start;
  }

  .page-about .team-figure {
    margin-top: 28px;
  }

  .page-about .coverage__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 48px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }
}