.page-about {
  --ab-rail: 88px;
  --ab-gap: clamp(20px, 3vw, 40px);
  background: var(--score);
  color: var(--slate);
}

.page-about .container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
  box-sizing: border-box;
}

.page-about .media {
  margin: 0;
  overflow: hidden;
}

.page-about .media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .media__caption {
  display: block;
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  background: var(--score);
  padding-top: clamp(14px, 2vw, 22px);
}

.page-about .about-crumb .breadcrumb {
  font-size: 13px;
}

/* ---------- 开篇窄栏长文 ---------- */
.page-about .about-lede {
  background: var(--score);
  padding: clamp(18px, 2.6vw, 32px) 0 clamp(44px, 6vw, 84px);
}

.page-about .about-lede__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ab-gap);
}

.page-about .about-lede__rail {
  position: relative;
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-lede__num {
  font-size: 24px;
  font-weight: 600;
  line-height: 1;
  color: var(--steppe);
}

.page-about .about-lede__code {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--moss);
}

.page-about .about-lede__body {
  max-width: 66ch;
}

.page-about .about-lede__body h1 {
  margin: 12px 0 0;
  font-size: clamp(27px, 4.2vw, 46px);
  line-height: 1.16;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--night);
}

.page-about .about-lede__lead {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--signal);
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.78;
  color: var(--slate);
}

.page-about .about-lede__prose p {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--slate);
}

.page-about .about-lede__meta {
  margin: 26px 0 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--moss);
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

/* ---------- 粘性目录 ---------- */
.page-about .about-index {
  position: sticky;
  top: var(--header-stack);
  z-index: 30;
  background: var(--night);
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-index__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 54px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__label {
  flex: none;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--lime);
  padding-right: 12px;
  border-right: 1px solid var(--line-light);
}

.page-about .about-index__list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  white-space: nowrap;
}

.page-about .about-index__list a {
  display: inline-block;
  padding: 6px 10px;
  font-size: 13px;
  line-height: 1.4;
  color: rgba(247, 245, 239, .66);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .24s var(--ease), border-color .24s var(--ease), transform .24s var(--ease);
}

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

.page-about .about-index__list a.is-active {
  color: var(--score);
  border-bottom-color: var(--lime);
  transform: translateX(2px);
}

/* ---------- 赛区覆盖 ---------- */
.page-about .about-coverage {
  position: relative;
  background: var(--night);
  color: var(--score);
  padding: clamp(44px, 6vw, 92px) 0 clamp(48px, 6vw, 88px);
}

.page-about .about-coverage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(247, 245, 239, .035) 1px, transparent 1px);
  background-size: 100% 44px;
  pointer-events: none;
}

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

.page-about .about-coverage__media {
  margin-bottom: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line-light);
  background: var(--night-soft);
}

.page-about .about-coverage__media img {
  border-radius: 0;
  filter: saturate(.85);
}

.page-about .about-coverage__head {
  max-width: 74ch;
}

.page-about .about-coverage__head h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.26;
  letter-spacing: -.015em;
  font-weight: 900;
  color: var(--score);
}

.page-about .about-coverage__intro {
  margin-top: 18px;
  font-size: 16px;
  line-height: 1.88;
  color: rgba(247, 245, 239, .78);
}

.page-about .about-map {
  margin: clamp(26px, 4vw, 46px) 0 0;
}

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

.page-about .about-map__lines path {
  fill: none;
  stroke: rgba(247, 245, 239, .22);
  stroke-width: 1;
  stroke-dasharray: 3 6;
}

.page-about .about-map__dot {
  fill: var(--lime);
}

.page-about .about-map__halo {
  fill: none;
  stroke: var(--steppe);
  stroke-width: 1.2;
  opacity: .8;
  transform-box: fill-box;
  transform-origin: center;
  transition: transform .32s var(--ease), stroke .32s var(--ease), opacity .32s var(--ease);
}

.page-about .about-map__node:hover .about-map__halo {
  transform: scale(1.5);
  stroke: var(--signal);
  opacity: 1;
}

.page-about .about-map__name {
  fill: var(--score);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
}

.page-about .about-map__code {
  fill: var(--moss);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
}

.page-about .about-map__node:hover .about-map__code {
  fill: var(--lime);
}

.page-about .about-map__caption {
  margin-top: 12px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--moss);
}

.page-about .about-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 0;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.page-about .about-stats__item {
  flex: 1 1 44%;
  min-width: 0;
  padding: 18px 14px 18px 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-stats__num {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 600;
  line-height: 1;
  color: var(--signal);
}

.page-about .about-stats__label {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(247, 245, 239, .7);
}

.page-about .about-coverage__note {
  margin: clamp(24px, 3vw, 34px) 0 0;
  max-width: 76ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(247, 245, 239, .66);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--clay);
  padding: clamp(48px, 6.5vw, 100px) 0;
}

.page-about .about-team h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.26;
  letter-spacing: -.015em;
  font-weight: 900;
  color: var(--night);
}

.page-about .about-team__intro {
  margin-top: 16px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-team__card {
  background: var(--score);
  border: 1px solid var(--line);
  border-top: 3px solid var(--steppe);
  border-radius: var(--radius);
  padding: 22px 22px 26px;
  box-shadow: 0 18px 34px -30px rgba(14, 27, 44, .9);
}

.page-about .about-team__card--text {
  border-top-color: var(--brick);
}

.page-about .about-team__code {
  display: block;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--moss);
}

.page-about .about-team__num {
  margin: 14px 0 4px;
  font-size: clamp(40px, 6vw, 58px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--steppe);
}

.page-about .about-team__card h3 {
  margin: 10px 0 0;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--night);
}

.page-about .about-team__desc {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-muted);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  background: var(--score);
  padding: clamp(48px, 6.5vw, 100px) 0;
}

.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-flow h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.26;
  letter-spacing: -.015em;
  font-weight: 900;
  color: var(--night);
}

.page-about .about-flow__intro {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .about-flow__steps {
  margin: clamp(24px, 3vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-flow__idx {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--steppe);
  padding-top: 3px;
}

.page-about .about-flow__stepbody h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--night);
}

.page-about .about-flow__stepbody p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-muted);
}

.page-about .about-flow__note {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 16px 18px;
  background: var(--clay);
  border-left: 3px solid var(--signal);
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}

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

.page-about .about-flow__media img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius);
}

/* ---------- 时间轴 ---------- */
.page-about .about-track {
  background: var(--clay);
  padding: clamp(48px, 6.5vw, 100px) 0;
}

.page-about .about-track h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.26;
  letter-spacing: -.015em;
  font-weight: 900;
  color: var(--night);
}

.page-about .about-track__intro {
  margin-top: 14px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-muted);
}

.page-about .about-track__list {
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.6vw, 40px) clamp(26px, 3.4vw, 40px);
}

.page-about .about-track__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 9px;
  height: 9px;
  box-sizing: content-box;
  border: 2px solid var(--steppe);
  border-radius: 50%;
  background: var(--clay);
}

.page-about .about-track__item::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 24px;
  bottom: 0;
  width: 1px;
  background: rgba(42, 48, 56, .18);
}

.page-about .about-track__item:last-child::after {
  display: none;
}

.page-about .about-track__details summary {
  list-style: none;
  cursor: pointer;
}

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

.page-about .about-track__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
}

.page-about .about-track__idx {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--steppe);
  border: 1px solid rgba(31, 111, 92, .35);
  padding: 2px 6px;
  border-radius: var(--radius);
}

.page-about .about-track__title {
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--night);
  transition: color .24s var(--ease);
}

.page-about .about-track__details summary:hover .about-track__title {
  color: var(--steppe);
}

.page-about .about-track__details[open] .about-track__title {
  color: var(--steppe);
}

.page-about .about-track__details[open] .about-track__idx {
  background: var(--night);
  color: var(--lime);
  border-color: var(--night);
}

.page-about .about-track__body {
  max-width: 68ch;
  margin-top: 10px;
}

.page-about .about-track__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink-muted);
}

/* ---------- 城市会客厅 ---------- */
.page-about .about-club {
  background: var(--night);
  color: var(--score);
  padding: clamp(48px, 6.5vw, 100px) 0 clamp(52px, 7vw, 104px);
}

.page-about .about-club__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-club h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.26;
  letter-spacing: -.015em;
  font-weight: 900;
  color: var(--score);
}

.page-about .about-club__body > p {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.88;
  color: rgba(247, 245, 239, .78);
}

.page-about .about-club__list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-light);
}

.page-about .about-club__list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--line-light);
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 245, 239, .76);
}

.page-about .about-club__tag {
  display: inline-block;
  margin-right: 10px;
  padding: 1px 7px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--lime);
  border: 1px solid rgba(200, 240, 74, .4);
  border-radius: var(--radius);
}

.page-about .about-club__addr {
  margin: 24px 0 0;
  font-style: normal;
  font-size: 15px;
  line-height: 1.8;
  color: var(--score);
}

.page-about .about-club__addrlabel {
  display: inline-block;
  margin-right: 10px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--moss);
}

.page-about .about-club__contact {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(247, 245, 239, .82);
}

.page-about .about-club__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-club__fav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 0 16px;
  background: transparent;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  color: var(--score);
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: border-color .24s var(--ease), color .24s var(--ease), background .24s var(--ease);
}

.page-about .about-club__fav:hover,
.page-about .about-club__fav:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
}

.page-about .about-club__favicon {
  width: 13px;
  height: 13px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  box-sizing: border-box;
  transition: background .24s var(--ease);
}

.page-about .about-club__fav[aria-pressed="true"] {
  border-color: var(--signal);
  color: var(--signal);
}

.page-about .about-club__fav[aria-pressed="true"] .about-club__favicon {
  background: var(--signal);
}

.page-about .about-club__hint {
  margin-top: 20px;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(247, 245, 239, .6);
}

.page-about .about-club__hint a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 240, 74, .45);
}

.page-about .about-club__hint a:hover {
  color: var(--score);
  border-bottom-color: var(--score);
}

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

.page-about .about-club__media img {
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line-light);
}

.page-about .about-club__media .media__caption {
  color: rgba(247, 245, 239, .5);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats__item {
    flex: 1 1 22%;
    padding-right: 18px;
    border-right: 1px solid var(--line-light);
  }

  .page-about .about-stats__item:last-child {
    border-right: 0;
  }
}

@media (min-width: 860px) {
  .page-about .about-lede__grid {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-lede__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-about .about-lede__rail::after {
    content: "";
    position: absolute;
    left: 15px;
    top: 40px;
    bottom: 0;
    width: 1px;
    background: linear-gradient(var(--steppe), rgba(31, 111, 92, 0));
  }

  .page-about .about-stats__item {
    flex: 1 1 23%;
  }
}

@media (min-width: 780px) {
  .page-about .about-team__row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-team__card:nth-child(2) {
    margin-top: 36px;
  }

  .page-about .about-team__card:nth-child(3) {
    margin-top: 76px;
  }
}

@media (min-width: 920px) {
  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .about-club__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-map__halo,
  .page-about .about-index__list a,
  .page-about .about-club__fav,
  .page-about .about-track__title {
    transition: none;
  }

  .page-about .about-map__node:hover .about-map__halo {
    transform: none;
  }

  .page-about .about-index__list a.is-active {
    transform: none;
  }
}
<<<END>>>