.page-about {
  --about-rail: 62px;
  --about-dot: 38px;
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

@media (min-width: 900px) {
  .page-about {
    --about-rail: 88px;
    --about-dot: 44px;
  }
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-about .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--flame-red);
}

.page-about .eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--feather-red);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 44px) clamp(36px, 6vw, 72px);
  border-bottom: var(--line);
  background:
    radial-gradient(120% 80% at 100% 0%, rgba(255, 217, 166, 0.62), transparent 58%),
    radial-gradient(90% 70% at 0% 100%, rgba(224, 58, 47, 0.07), transparent 60%),
    var(--paper);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
  }
}

.page-about .about-hero .h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.4vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-about .about-hero .lead {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  background: var(--haze);
  border: var(--line);
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-stats > div {
  background: var(--paper);
  padding: 14px 16px 16px;
}

.page-about .about-stats dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
}

.page-about .about-stats dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--flame-red);
}

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

@media (min-width: 900px) {
  .page-about .about-hero__media img {
    aspect-ratio: 5 / 7;
  }
}

.page-about .about-hero__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--stone);
}

/* 导读条 */
.page-about .about-index {
  background: var(--ink-blue);
  border-bottom: 3px solid var(--flame-red);
}

.page-about .about-index ul {
  display: flex;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 13px 16px;
  font-size: 14px;
  white-space: nowrap;
  color: rgba(247, 245, 242, 0.72);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--feather-red);
}

.page-about .about-index .num {
  font-size: 11px;
  font-weight: 700;
  color: var(--gold);
}

/* 时间轴主线 */
.page-about .about-stream {
  position: relative;
  padding-block: clamp(32px, 5vw, 64px) clamp(44px, 7vw, 96px);
}

.page-about .about-stream::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--about-dot) / 2);
  width: 1px;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 0, var(--haze) 3%, var(--haze) 95%, transparent 100%);
}

.page-about .about-node {
  position: relative;
  padding-left: calc(var(--about-rail) + 4px);
}

.page-about .about-node + .about-node {
  margin-top: clamp(36px, 5.5vw, 76px);
}

.page-about .about-node__idx {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--about-dot);
  height: var(--about-dot);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper);
  background: var(--flame-red);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}

.page-about .about-node__content {
  max-width: 44rem;
}

.page-about .about-node--wide .about-node__content {
  max-width: none;
}

.page-about .about-node .h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.015em;
}

.page-about .about-text {
  margin: 14px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

/* 阶段 */
.page-about .stage__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 12px;
  border-bottom: var(--line);
}

.page-about .stage__head .h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.2;
}

.page-about .stage__fig {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--flame-red);
  white-space: nowrap;
}

/* 四组分工 */
.page-about .crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--haze);
  border: var(--line);
}

@media (min-width: 680px) {
  .page-about .crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .crew {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .crew__item {
  position: relative;
  background: var(--paper);
  padding: clamp(18px, 2.2vw, 26px);
  transition: background 0.16s var(--ease);
}

.page-about .crew__item:hover {
  background: #fffbf4;
}

.page-about .crew__item::after {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 14px;
  height: 1px;
  background: var(--feather-red);
  transform: rotate(-45deg);
}

.page-about .crew__no {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--flame-red);
}

.page-about .crew__item .h3 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.35;
}

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

.page-about .about-figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

/* 覆盖地图 */
.page-about .mapbox {
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(8px, 1.6vw, 20px);
  border: var(--line);
  background: #fcfaf7;
}

.page-about .mapbox__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .mapbox__outline {
  fill: rgba(47, 211, 198, 0.06);
  stroke: var(--haze);
  stroke-width: 1.5;
  stroke-dasharray: 6 6;
}

.page-about .district {
  cursor: default;
  outline: none;
}

.page-about .district__hit {
  fill: transparent;
}

.page-about .district__dot {
  fill: var(--night-blue);
  transform-box: fill-box;
  transform-origin: center;
  transition: fill 0.16s var(--ease), transform 0.16s var(--ease);
}

.page-about .district:hover .district__dot,
.page-about .district:focus .district__dot {
  fill: var(--feather-red);
  transform: scale(1.5);
}

.page-about .district__name {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  fill: var(--ink);
  text-anchor: middle;
  pointer-events: none;
}

.page-about .district__meta {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--flame-red);
  text-anchor: middle;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.16s var(--ease);
}

.page-about .district:hover .district__meta,
.page-about .district:focus .district__meta {
  opacity: 1;
}

.page-about .coverage-legend {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(20px, 3vw, 32px) 0 0;
  background: var(--haze);
  border: var(--line);
}

@media (min-width: 760px) {
  .page-about .coverage-legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .coverage-legend > div {
  background: var(--paper);
  padding: 18px 20px;
}

.page-about .coverage-legend dt {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--flame-red);
}

.page-about .coverage-legend dd {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

/* 合作深色带 */
.page-about .about-band {
  position: relative;
  margin-top: 6px;
  padding: clamp(24px, 4vw, 48px);
  overflow: hidden;
  color: var(--paper);
  background:
    radial-gradient(120% 100% at 100% 0%, rgba(176, 18, 28, 0.55), transparent 62%),
    radial-gradient(90% 80% at 0% 100%, rgba(47, 211, 198, 0.14), transparent 62%),
    var(--ink-blue);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-band::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(217, 211, 202, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(217, 211, 202, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
}

.page-about .about-band > * {
  position: relative;
  z-index: 1;
}

.page-about .about-band .eyebrow {
  color: var(--gold);
}

.page-about .about-band .eyebrow::before {
  background: var(--gold);
}

.page-about .about-band .h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-band .about-text {
  max-width: 62ch;
  color: rgba(247, 245, 242, 0.84);
}

.page-about .about-band__media {
  margin: clamp(20px, 3vw, 30px) 0 0;
}

.page-about .about-band__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: 0.92;
}

.page-about .rules {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0 clamp(20px, 3vw, 36px);
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 760px) {
  .page-about .rules {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .rules li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  padding: 14px 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(247, 245, 242, 0.8);
  border-top: 1px solid rgba(217, 211, 202, 0.22);
}

.page-about .rules__no {
  font-size: 11px;
  font-weight: 700;
  color: var(--cyan);
  padding-top: 2px;
}

/* 团队 */
.page-about .team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
}

@media (min-width: 900px) {
  .page-about .team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .team__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--line);
}

.page-about .team__list li {
  border-bottom: var(--line);
}

.page-about .team__item summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  cursor: pointer;
  list-style: none;
  transition: color 0.16s var(--ease);
}

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

.page-about .team__item summary:hover {
  color: var(--flame-red);
}

.page-about .team__item summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--flame-red);
  margin-right: 2px;
}

.page-about .team__item[open] summary::before {
  content: "−";
}

.page-about .team__count {
  flex: none;
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-about .team__item p {
  margin: 0 0 16px;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .team__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 3px solid var(--flame-red);
}

.page-about .team__cta p {
  flex: 1 1 260px;
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--stone);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .crew__item,
  .page-about .district__dot,
  .page-about .district__meta,
  .page-about .team__item summary {
    transition: none;
  }
}
<<<END>>>