.page-about {
  --about-rail: 88px;
  --about-soft: rgba(246, 247, 242, 0.78);
  --about-shadow: 0 18px 34px -26px rgba(0, 0, 0, 0.9);
  background: var(--ink);
  color: var(--chalk);
  overflow-x: clip;
}

/* ============ HERO ============ */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(22px, 3.5vw, 44px);
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(22px, 3vw, 38px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.4vw, 82px);
  line-height: 1.02;
  letter-spacing: -0.04em;
  margin: 14px 0 0;
  text-wrap: balance;
}

.page-about .about-hero__mark {
  color: var(--signal);
  position: relative;
  display: inline-block;
}

.page-about .about-hero__mark::after {
  content: "";
  position: absolute;
  left: 0;
  right: -6px;
  bottom: 0.08em;
  height: 0.16em;
  background: var(--signal);
  opacity: 0.28;
}

.page-about .about-hero__intro {
  max-width: 36em;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  font-size: clamp(15px, 1.35vw, 18px);
  line-height: 1.78;
  color: var(--about-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero__legend {
  border: 1px solid var(--line);
  background: rgba(12, 33, 24, 0.7);
  padding: 16px 18px 8px;
  box-shadow: var(--about-shadow);
}

.page-about .about-hero__legend-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .about-crosshair {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: var(--score);
  stroke-width: 1.4;
  flex: none;
}

.page-about .about-index {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index li + li {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 2px;
  color: var(--about-soft);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.04em;
  transition: color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--chalk);
  transform: translateX(4px);
}

.page-about .about-index__link.is-current {
  color: var(--pulse);
}

.page-about .about-index__n {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--signal);
  min-width: 2.2em;
}

.page-about .about-hero__media {
  width: min(100% - var(--gutter) * 2, var(--max));
  margin: clamp(28px, 4vw, 54px) auto 0;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
}

.page-about .about-hero__cap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .about-hero__cap::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--signal);
  flex: none;
}

/* ============ 通用区块 ============ */
.page-about .about-block {
  position: relative;
  padding-block: clamp(52px, 8.5vw, 108px);
}

.page-about .about-block--pitch {
  background: var(--pitch);
}

.page-about .about-block--stand {
  background: var(--stand);
}

.page-about .about-block--timeline {
  background:
    radial-gradient(120% 70% at 88% 0%, rgba(47, 227, 207, 0.07), transparent 60%),
    var(--ink);
}

.page-about .about-block--scale {
  background: var(--pitch);
}

.page-about .about-block--local {
  background: linear-gradient(165deg, rgba(124, 147, 255, 0.16), var(--ink) 62%);
}

.page-about .about-block--next {
  background: var(--stand);
  border-top: 1px solid var(--line);
}

.page-about .about-head {
  max-width: 780px;
}

.page-about .about-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.035em;
  margin: 12px 0 0;
  text-wrap: balance;
}

.page-about .about-head__lede {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: clamp(14.5px, 1.25vw, 17px);
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-copy {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: clamp(14.5px, 1.25vw, 17px);
  line-height: 1.82;
  color: var(--about-soft);
}

/* ============ 起点 ============ */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .about-origin__rail {
  display: flex;
  align-items: center;
  gap: 18px;
}

.page-about .about-origin__coord {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--score);
  white-space: nowrap;
}

.page-about .annotation--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--mist);
  line-height: 1;
}

.page-about .about-origin__body h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 50px);
  line-height: 1.06;
  letter-spacing: -0.035em;
  margin: 12px 0 0;
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-facts__item {
  background: var(--ink);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-facts__k {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--signal);
}

.page-about .about-facts__v {
  font-size: 14px;
  line-height: 1.6;
  color: var(--chalk);
}

/* ============ 团队 ============ */
.page-about .about-team {
  margin-top: clamp(30px, 4vw, 50px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-team__total {
  border-left: 3px solid var(--signal);
  padding-left: 18px;
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(88px, 15vw, 156px);
  line-height: 0.78;
  letter-spacing: -0.04em;
  color: var(--pulse);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__unit {
  display: block;
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--score);
}

.page-about .about-team__cap {
  margin: 14px 0 0;
  max-width: 28ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-soft);
}

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

.page-about .about-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px 18px;
  background: var(--pitch);
  border: 1px solid var(--line);
  box-shadow: 0 2px 0 rgba(241, 231, 214, 0.05), var(--about-shadow);
  transition: transform 240ms var(--ease), border-color 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  transform: translate(-2px, -2px);
  border-color: var(--signal);
  box-shadow: 7px 9px 0 rgba(255, 90, 31, 0.12), 0 22px 34px -24px #000;
}

.page-about .about-role__n {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  color: var(--score);
  font-variant-numeric: tabular-nums;
}

.page-about .about-role__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-role__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-soft);
}

/* ============ 流程 ============ */
.page-about .about-process__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-process__body h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.5vw, 50px);
  line-height: 1.06;
  letter-spacing: -0.035em;
  margin: 12px 0 0;
}

.page-about .about-shifts {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-shift {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-shift__mark {
  writing-mode: vertical-rl;
  text-orientation: upright;
  letter-spacing: 0.22em;
  font-size: 11px;
  color: var(--signal);
  border-right: 2px solid var(--signal);
  padding-right: 6px;
  justify-self: start;
}

.page-about .about-shift__text h3 {
  margin: 0;
  font-family: var(--font-num);
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--chalk);
}

.page-about .about-shift__text p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-soft);
}

.page-about .about-process__figure {
  margin: 0;
  align-self: start;
}

.page-about .about-process__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  transition: transform 600ms var(--ease);
}

.page-about .about-process__figure:hover img {
  transform: scale(1.02);
}

.page-about .about-process__figure figcaption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ============ 时间线 ============ */
.page-about .about-timeline {
  margin-top: clamp(30px, 4vw, 54px);
  border-top: 1px solid var(--line);
}

.page-about .about-year {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding-block: clamp(26px, 3.6vw, 42px);
  border-bottom: 1px solid var(--line);
  position: relative;
}

.page-about .about-year__rail {
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-about .about-year__num {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(44px, 8.4vw, 96px);
  line-height: 0.84;
  letter-spacing: -0.03em;
  color: rgba(158, 183, 170, 0.34);
  font-variant-numeric: tabular-nums;
  transition: color 260ms var(--ease);
}

.page-about .about-year.is-current .about-year__num {
  color: var(--signal);
}

.page-about .about-year__dash {
  flex: 1;
  height: 2px;
  max-width: 72px;
  background: var(--line);
  transition: background 260ms var(--ease);
}

.page-about .about-year.is-current .about-year__dash {
  background: var(--signal);
}

.page-about .about-year__body h3 {
  margin: 0;
  font-size: clamp(17px, 1.7vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-about .about-year__body p {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-year__note {
  font-size: 13px;
  color: var(--mist);
  border-left: 2px solid var(--rank);
  padding-left: 12px;
}

/* ============ 覆盖规模 ============ */
.page-about .about-scale {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-scale__item {
  background: var(--ink);
  padding: 20px 16px 22px;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
  min-width: 0;
}

.page-about .about-scale__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-scale__num {
  margin: 0;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(30px, 4.2vw, 44px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--chalk);
  font-variant-numeric: tabular-nums;
}

.page-about .about-scale__item:nth-child(1) .about-scale__num {
  color: var(--pulse);
}

.page-about .about-scale__item:nth-child(4) .about-scale__num {
  color: var(--rank);
}

.page-about .about-scale__item:nth-child(6) .about-scale__num {
  color: var(--score);
}

.page-about .about-partners {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .about-partners__item {
  padding-top: 16px;
  border-top: 2px solid var(--signal);
}

.page-about .about-partners__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--chalk);
}

.page-about .about-partners__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-soft);
}

/* ============ 本地服务 ============ */
.page-about .about-local {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

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

.page-about .about-local__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
  filter: saturate(0.9);
}

.page-about .about-local__body h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.5vw, 50px);
  line-height: 1.06;
  letter-spacing: -0.035em;
  margin: 12px 0 0;
}

.page-about .about-honors {
  list-style: none;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-honor {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  background: var(--paper);
  color: #17211c;
  box-shadow: 5px 6px 0 rgba(0, 0, 0, 0.32);
}

.page-about .about-honor__n {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 24px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #b03a0d;
  font-variant-numeric: tabular-nums;
}

.page-about .about-honor__t {
  font-size: 13.5px;
  line-height: 1.6;
}

/* ============ 下一步 ============ */
.page-about .about-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-next h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5vw, 56px);
  line-height: 1.04;
  letter-spacing: -0.04em;
  margin: 12px 0 0;
}

.page-about .about-next__lead {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: clamp(14.5px, 1.3vw, 17px);
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-next__alt {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-next__alt a {
  color: var(--score);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 207, 0.4);
}

.page-about .about-next__alt a:hover,
.page-about .about-next__alt a:focus-visible {
  border-bottom-color: var(--score);
}

.page-about .about-next__card {
  border: 1px solid var(--line);
  background: rgba(6, 19, 15, 0.55);
  padding: 20px 20px 22px;
  box-shadow: var(--about-shadow);
}

.page-about .about-next__card-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--signal);
}

.page-about .about-next__line {
  margin: 0 0 8px;
  font-size: 13.5px;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-about .about-next__strong {
  font-family: var(--font-num);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--chalk);
}

.page-about .about-copy-btn {
  appearance: none;
  border: 1px solid var(--score);
  background: transparent;
  color: var(--score);
  font: inherit;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  padding: 7px 14px;
  margin: 0 0 16px;
  cursor: pointer;
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-copy-btn:hover,
.page-about .about-copy-btn:focus-visible {
  background: rgba(47, 227, 207, 0.14);
}

.page-about .about-copy-btn[data-copied="true"] {
  border-color: var(--pulse);
  color: var(--pulse);
  background: rgba(216, 255, 69, 0.12);
}

.page-about .about-next__note {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }

  .page-about .about-year {
    grid-template-columns: minmax(140px, 200px) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-year__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    position: sticky;
    top: 96px;
  }

  .page-about .about-year__dash {
    width: 2px;
    max-width: none;
    height: 44px;
    flex: none;
  }

  .page-about .about-year__body {
    padding-left: var(--step, 0);
    transition: transform 300ms var(--ease);
  }

  .page-about .about-year:nth-child(2) {
    --step: 16px;
  }

  .page-about .about-year:nth-child(3) {
    --step: 32px;
  }

  .page-about .about-year:nth-child(4) {
    --step: 48px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .about-origin__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-origin__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    position: sticky;
    top: 100px;
    align-self: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-about .about-process__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-local {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-next {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
}

@media (min-width: 1120px) {
  .page-about .about-scale {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-role,
  .page-about .about-year__num,
  .page-about .about-year__dash,
  .page-about .about-year__body,
  .page-about .about-process__figure img,
  .page-about .about-copy-btn {
    transition: none;
  }

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

  .page-about .about-process__figure:hover img {
    transform: none;
  }
}