.page-about {
  --about-gap: clamp(18px, 3.4vw, 44px);
  --about-pad: clamp(44px, 7vw, 96px);
  --about-line: var(--concrete);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-block: 18px 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 52px) var(--about-pad);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--deep);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 28px;
  height: 3px;
  background: var(--orange);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 9vw, 88px);
  line-height: .98;
  letter-spacing: -.01em;
  text-shadow: 4px 4px 0 var(--ash);
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: 0 0 26px;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.8;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 28px;
}

.page-about .about-stat {
  border: var(--edge) solid var(--ink);
  background: var(--ash);
  padding: 12px 14px;
  box-shadow: 5px 5px 0 var(--concrete);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  color: var(--deep);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink);
}

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

.page-about .about-hero__actions .btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
}

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

/* ---------- 斜切分隔 ---------- */
.page-about .about-slant {
  height: clamp(34px, 5vw, 68px);
  background: var(--grass);
  clip-path: polygon(0 0, 100% 0, 100% 34%, 0 100%);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding-block: var(--about-pad);
  background: var(--ash);
  border-block: var(--edge) solid var(--ink);
}

.page-about .about-origin__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-marker {
  border-left: var(--edge) solid var(--grass);
  padding-left: 18px;
}

.page-about .about-marker__year {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(56px, 14vw, 132px);
  font-weight: 700;
  line-height: .85;
  color: var(--deep);
  letter-spacing: -.03em;
}

.page-about .about-marker__line {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.35;
  color: var(--ink);
}

.page-about .about-origin__body h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.1;
}

.page-about .about-origin__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 18px 20px;
  border: var(--edge) solid var(--ink);
  border-left: 10px solid var(--orange);
  background: var(--paper);
  box-shadow: 8px 8px 0 var(--concrete);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 22px);
  line-height: 1.5;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding-block: var(--about-pad);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 10px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline__item {
  flex: 0 0 min(260px, 78vw);
  scroll-snap-align: start;
  border: var(--edge) solid var(--ink);
  background: var(--paper);
  padding: 18px 18px 22px;
  box-shadow: 8px 8px 0 var(--concrete);
  transition: transform 160ms var(--ease-out), box-shadow 160ms var(--ease-out), border-color 160ms linear;
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus-within {
  transform: translate(-2px, -4px);
  box-shadow: 10px 12px 0 var(--grass);
  border-color: var(--deep);
}

.page-about .about-timeline__item--now {
  background: var(--deep);
  color: var(--paper);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  color: var(--grass);
  font-variant-numeric: tabular-nums;
}

.page-about .about-timeline__item--now .about-timeline__year {
  color: var(--lime);
}

.page-about .about-timeline__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: var(--about-pad);
  background: var(--ash);
  border-block: var(--edge) solid var(--ink);
}

.page-about .about-team__intro {
  max-width: 60ch;
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: 28px;
}

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

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

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

.page-about .about-filter .filter-btn {
  min-height: 44px;
  padding: 8px 18px;
  border: var(--edge) solid var(--ink);
  border-radius: var(--radius-pill);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: .04em;
  cursor: pointer;
}

.page-about .about-filter .filter-btn[aria-pressed="true"] {
  background: var(--orange);
  color: var(--ink);
  box-shadow: 4px 4px 0 var(--deep);
}

.page-about .about-roster {
  display: grid;
  gap: 14px;
}

.page-about .about-roster__row {
  display: grid;
  gap: 6px;
  padding: 18px;
  border: var(--edge) solid var(--ink);
  background: var(--paper);
  box-shadow: 6px 6px 0 var(--concrete);
}

.page-about .about-roster__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.2;
  color: var(--deep);
}

.page-about .about-roster__count {
  margin: 0;
  font-family: var(--font-data);
  font-size: 15px;
  font-weight: 700;
  color: var(--grass);
  font-variant-numeric: tabular-nums;
}

.page-about .about-roster__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about [data-filter-hidden] {
  display: none;
}

/* ---------- 节奏 ---------- */
.page-about .about-flow {
  padding-block: var(--about-pad);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-flow .section-head__kicker {
  color: var(--sand);
}

.page-about .about-flow .section-head__title {
  color: var(--paper);
}

.page-about .about-flow__list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-flow__item {
  border: var(--edge) solid var(--concrete);
  background: var(--deep);
  padding: 20px;
  box-shadow: 8px 8px 0 rgba(0, 0, 0, .35);
}

.page-about .about-flow__step {
  display: inline-block;
  margin-bottom: 12px;
  padding: 5px 12px;
  border: 2px solid var(--amber);
  border-radius: var(--radius-pill);
  font-family: var(--font-data);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.25;
  color: var(--paper);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 合作地图 ---------- */
.page-about .about-venues {
  padding-block: var(--about-pad);
}

.page-about .about-venues__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-venues__copy > p {
  margin: 16px 0 22px;
  font-size: 16px;
  line-height: 1.8;
  max-width: 60ch;
}

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

.page-about .about-city {
  padding: 14px 16px;
  border: var(--edge) solid var(--ink);
  border-left: 10px solid var(--grass);
  background: var(--paper);
  box-shadow: 5px 5px 0 var(--concrete);
  transition: border-left-color 160ms linear, transform 160ms var(--ease-out);
}

.page-about .about-city:hover {
  border-left-color: var(--orange);
  transform: translateX(3px);
}

.page-about .about-city__name {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
}

.page-about .about-city__types {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
}

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

/* ---------- 导览 ---------- */
.page-about .about-guide {
  padding-block: var(--about-pad);
  background: var(--indigo);
  color: var(--paper);
}

.page-about .about-guide .section-head__kicker {
  color: var(--sand);
}

.page-about .about-guide .section-head__title {
  color: var(--paper);
}

.page-about .about-guide__intro {
  max-width: 58ch;
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-guide__list {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-guide__row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px 14px;
  padding: 18px 20px;
  border: var(--edge) solid var(--concrete);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  box-shadow: 8px 8px 0 rgba(0, 0, 0, .3);
  transition: transform 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
}

.page-about .about-guide__row:hover,
.page-about .about-guide__row:focus-visible {
  transform: translate(-2px, -3px);
  box-shadow: 10px 11px 0 var(--grass);
}

.page-about .about-guide__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  color: var(--lime);
}

.page-about .about-guide__desc {
  grid-column: 1 / 2;
  font-size: 14.5px;
  line-height: 1.7;
}

.page-about .about-guide__arrow {
  grid-row: 1 / span 2;
  grid-column: 2;
  font-family: var(--font-data);
  font-size: 24px;
  color: var(--orange);
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestones {
  padding-block: var(--about-pad);
}

.page-about .about-milestones__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--edge) solid var(--ink);
}

.page-about .about-milestones__item {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 2px solid var(--concrete);
}

.page-about .about-milestones__year {
  font-family: var(--font-data);
  font-size: 16px;
  font-weight: 700;
  color: var(--wine);
  font-variant-numeric: tabular-nums;
}

.page-about .about-milestones__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
}

.page-about .about-milestones__text a {
  color: var(--grass);
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-block: 0 var(--about-pad);
}

.page-about .about-cta__panel {
  display: grid;
  gap: 22px;
  padding: clamp(22px, 4vw, 44px);
  border: var(--edge) solid var(--ink);
  background: var(--ash);
  box-shadow: var(--shadow-hard);
}

.page-about .about-cta__copy h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.1;
}

.page-about .about-cta__copy p {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
}

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

.page-about .about-cta__links .btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-roster__row {
    grid-template-columns: 1.1fr .5fr 2.4fr;
    align-items: start;
    gap: 10px 20px;
  }

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

  .page-about .about-milestones__item {
    grid-template-columns: 190px 1fr;
    align-items: baseline;
    gap: 0 24px;
  }

  .page-about .about-guide__row {
    grid-template-columns: 220px 1fr 40px;
  }

  .page-about .about-guide__desc {
    grid-column: 2 / 3;
  }

  .page-about .about-guide__arrow {
    grid-row: 1 / span 2;
    grid-column: 3;
    justify-self: end;
  }

  .page-about .about-cta__panel {
    grid-template-columns: 1.4fr 1fr;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 4fr 7fr;
    gap: clamp(28px, 5vw, 72px);
  }

  .page-about .about-marker {
    padding-left: 24px;
  }

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

  .page-about .about-timeline__item {
    flex: none;
  }

  .page-about .about-team__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .about-venues__grid {
    grid-template-columns: 6fr 5fr;
    align-items: start;
    gap: clamp(28px, 5vw, 72px);
  }

  .page-about .about-guide__list {
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item,
  .page-about .about-city,
  .page-about .about-guide__row {
    transition: none;
  }

  .page-about .about-timeline__item:hover,
  .page-about .about-timeline__item:focus-within,
  .page-about .about-city:hover,
  .page-about .about-guide__row:hover,
  .page-about .about-guide__row:focus-visible {
    transform: none;
  }
}