.page-about {
  --about-narrow: 40em;
  --about-rule: 2px solid var(--grid-gray);
  background: var(--asphalt-900);
  color: var(--pit-white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 5vw, 44px) 0 clamp(36px, 7vw, 76px);
  border-bottom: var(--line) solid var(--grid-gray);
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(244, 245, 242, 0.035) 0 1px, transparent 1px 9px);
  pointer-events: none;
}
.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 5vw, 48px);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(46px, 11.5vw, 128px);
  line-height: 0.94;
  letter-spacing: 0.01em;
  margin: 14px 0 20px;
  color: var(--pit-white);
}
.page-about .about-hero__title em {
  font-style: normal;
  color: var(--signal-yellow);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-tower {
  border: var(--line) solid var(--grid-gray);
  background: var(--asphalt-800);
  box-shadow: var(--shadow-hard);
  padding: 14px 16px 16px;
}
.page-about .about-tower__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--grid-gray);
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist-cyan);
}
.page-about .about-tower__rows {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-tower__rows li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(43, 49, 56, 0.95);
}
.page-about .about-tower__rows li:last-child {
  border-bottom: 0;
}
.page-about .about-tower__num {
  flex: 0 0 auto;
  min-width: 4.4em;
  font-family: var(--font-index);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--signal-yellow);
}
.page-about .about-tower__label {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(244, 245, 242, 0.72);
}
.page-about .about-tower__bar {
  height: 6px;
  margin-top: 14px;
  background: var(--grid-gray);
}
.page-about .about-tower__bar span {
  display: block;
  height: 100%;
  width: 72%;
  background: var(--signal-yellow);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
    align-items: end;
    gap: clamp(32px, 5vw, 64px);
  }
}

/* ---------- 章节目录条 ---------- */
.page-about .about-nav {
  background: var(--deep-ink);
  border-bottom: var(--line) solid var(--grid-gray);
}
.page-about .about-nav__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.page-about .about-nav__label {
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist-cyan);
}
.page-about .section-index {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .section-index__item {
  margin: 0;
}
.page-about .section-index__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  border: 1px solid var(--grid-gray);
  background: transparent;
  color: rgba(244, 245, 242, 0.8);
  font-size: 13px;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.page-about .section-index__link:hover,
.page-about .section-index__link:focus-visible,
.page-about .section-index__link[data-active="true"] {
  background: var(--signal-yellow);
  border-color: var(--signal-yellow);
  color: var(--asphalt-900);
}
.page-about .section-index__num {
  font-family: var(--font-index);
  font-size: 10px;
  letter-spacing: 0.1em;
  opacity: 0.8;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: clamp(42px, 8vw, 92px) 0;
  border-bottom: 1px solid var(--grid-gray);
}
.page-about .about-sec--board {
  background: var(--asphalt-800);
}
.page-about .about-col {
  max-width: var(--about-narrow);
}
.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(28px, 4.6vw, 50px);
  line-height: 1.08;
  margin: 12px 0 18px;
  color: var(--pit-white);
}
.page-about .about-head {
  max-width: 46em;
  margin-bottom: clamp(24px, 4vw, 40px);
}
.page-about .about-head__note {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 245, 242, 0.66);
}
.page-about .about-col .prose p {
  margin: 0 0 1.1em;
}

.page-about .about-figure {
  margin: clamp(26px, 5vw, 44px) 0 0;
  max-width: 100%;
}
.page-about .about-figure .figure__media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.page-about .about-figure .figure__media img,
.page-about .about-team__figure .figure__media img,
.page-about .about-versions__figure .figure__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
@media (min-width: 900px) {
  .page-about .about-figure {
    max-width: 820px;
  }
}

.page-about .about-quote {
  margin: clamp(24px, 4vw, 34px) 0 0;
  padding: 18px 20px;
  border: var(--line) solid var(--signal-yellow);
  border-left-width: 6px;
  background: var(--asphalt-800);
  box-shadow: var(--shadow-hard);
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.65;
  color: var(--pit-white);
}

/* ---------- 覆盖 ---------- */
.page-about .about-reach {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}
.page-about .about-map {
  border: var(--line) solid var(--grid-gray);
  background: var(--asphalt-900);
  padding: 12px;
}
.page-about .about-map__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2px;
  background: var(--grid-gray);
  border: 1px solid var(--grid-gray);
}
.page-about .about-map__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 2px;
  overflow: hidden;
  background: var(--asphalt-800);
  font-family: var(--font-index);
  font-size: 10px;
  letter-spacing: 0.02em;
  color: rgba(244, 245, 242, 0.62);
  transition: background 0.16s ease, color 0.16s ease;
}
.page-about .about-map__cell--key {
  background: var(--asphalt-900);
  color: var(--signal-yellow);
  box-shadow: inset 0 0 0 1px var(--signal-yellow);
}
.page-about .about-map__cell:hover {
  background: var(--signal-yellow);
  color: var(--asphalt-900);
}
.page-about .about-map__name {
  white-space: nowrap;
  pointer-events: none;
}
.page-about .about-map__hint {
  margin: 12px 0 0;
  font-family: var(--font-index);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.06em;
  color: var(--mist-cyan);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  border: var(--line) solid var(--grid-gray);
  background: var(--grid-gray);
}
.page-about .about-stats .stat {
  background: var(--asphalt-900);
  padding: 14px 12px;
}
.page-about .about-stats .stat__value {
  display: block;
  font-family: var(--font-index);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--signal-yellow);
}
.page-about .about-stats .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: rgba(244, 245, 242, 0.66);
}

.page-about .about-legend {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-legend__item {
  display: grid;
  grid-template-columns: 4.6em minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(244, 245, 242, 0.74);
}
.page-about .about-legend__key {
  font-family: var(--font-index);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--signal-yellow);
}

@media (min-width: 600px) {
  .page-about .about-map__grid {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
  .page-about .about-map__cell {
    min-height: 42px;
  }
}
@media (min-width: 880px) {
  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.85fr);
    align-items: start;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}
.page-about .about-team__figure {
  margin: 0;
}
.page-about .about-team__figure .figure__media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
}
.page-about .about-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--grid-gray);
  border: var(--line) solid var(--grid-gray);
}
.page-about .about-steps__item {
  display: grid;
  grid-template-columns: 2.4em minmax(0, 1fr);
  gap: 10px;
  padding: 14px 16px;
  background: var(--asphalt-900);
}
.page-about .about-steps__num {
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--signal-yellow);
  padding-top: 3px;
}
.page-about .about-steps__title {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--pit-white);
}
.page-about .about-steps__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(244, 245, 242, 0.66);
}
@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

/* ---------- 版本时间线 ---------- */
.page-about .about-ruler {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 10px;
}
.page-about .about-mile {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-mile__item {
  position: relative;
  padding: 18px 16px 16px;
  border: var(--line) solid var(--grid-gray);
  background: var(--asphalt-900);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.page-about .about-mile__item:hover,
.page-about .about-mile__item:focus,
.page-about .about-mile__item:focus-within {
  transform: translateY(-4px);
  border-color: var(--signal-yellow);
  box-shadow: var(--shadow-hard);
  outline: none;
}
.page-about .about-mile__ver {
  display: inline-block;
  padding: 2px 8px;
  background: var(--signal-yellow);
  color: var(--asphalt-900);
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.1em;
}
.page-about .about-mile__title {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(20px, 2.4vw, 24px);
  color: var(--pit-white);
}
.page-about .about-mile__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 245, 242, 0.72);
}
.page-about .about-mile__more {
  overflow: hidden;
  max-height: none;
  opacity: 1;
  transition: max-height 0.28s ease, opacity 0.2s ease;
}
.page-about .about-mile__more p {
  margin: 0;
  padding-top: 10px;
  margin-top: 12px;
  border-top: 1px dashed var(--grid-gray);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist-cyan);
}
.page-about .about-versions__figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
  max-width: 100%;
}
.page-about .about-versions__figure .figure__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}
@media (min-width: 820px) {
  .page-about .about-mile {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-mile__item {
    padding: 20px 18px 18px;
  }
  .page-about .about-mile__more {
    max-height: 0;
    opacity: 0;
  }
  .page-about .about-mile__item:hover .about-mile__more,
  .page-about .about-mile__item:focus .about-mile__more,
  .page-about .about-mile__item:focus-within .about-mile__more {
    max-height: 220px;
    opacity: 1;
  }
  .page-about .about-versions__figure {
    max-width: 660px;
  }
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 18px;
}
.page-about .about-partners .card {
  padding: 18px 16px 20px;
}
.page-about .about-partners .card__index {
  display: block;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist-cyan);
  margin-bottom: 8px;
}
.page-about .about-partners .card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(19px, 2.2vw, 23px);
  line-height: 1.25;
  color: var(--pit-white);
}
.page-about .about-partners .card__meta {
  margin: 0 0 10px;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--signal-yellow);
}
.page-about .about-partners .card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 245, 242, 0.7);
}
@media (min-width: 780px) {
  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    align-items: start;
  }
}

/* ---------- 主体与联系 ---------- */
.page-about .about-contact {
  margin: 26px 0 0;
  display: grid;
  gap: 2px;
  background: var(--grid-gray);
  border: var(--line) solid var(--grid-gray);
}
.page-about .about-contact__row {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  background: var(--asphalt-900);
}
.page-about .about-contact__label {
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist-cyan);
}
.page-about .about-contact__value {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--pit-white);
  word-break: break-word;
}
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

@media (min-width: 560px) {
  .page-about .about-contact__row {
    grid-template-columns: 7em minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-mile__item,
  .page-about .about-section__link,
  .page-about .about-map__cell {
    transition: none;
  }
  .page-about .about-mile__item:hover,
  .page-about .about-mile__item:focus {
    transform: none;
  }
}
<<<END>>>