.page-about {
  background: var(--night);
  color: var(--cream);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(155, 255, 87, .14), transparent 56%),
    radial-gradient(90% 70% at 4% 100%, rgba(78, 214, 200, .12), transparent 62%),
    linear-gradient(180deg, var(--night) 0%, var(--night-deep) 100%);
  padding-block: clamp(1.2rem, 3vw, 2rem) clamp(2.6rem, 6vw, 5rem);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--turf), var(--cyan) 38%, transparent 82%);
}

.page-about .about-hero__crumb {
  margin: 0 0 clamp(1.6rem, 4vw, 2.8rem);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .06em;
}

.page-about .about-hero__crumb .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__crumb li + li::before {
  content: "/";
  margin-right: .5rem;
  color: var(--line-strong);
}

.page-about .about-hero__crumb a {
  color: var(--rock);
  text-decoration: none;
}

.page-about .about-hero__crumb a:hover {
  color: var(--turf);
}

.page-about .about-hero__crumb [aria-current="page"] {
  color: var(--silver);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: end;
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: baseline;
  gap: .6rem;
  margin: 0 0 1.1rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--turf);
}

.page-about .about-eyebrow__num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1rem;
  color: var(--signal);
  letter-spacing: 0;
}

.page-about .about-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 7vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -.022em;
  color: var(--cream);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  max-width: 46ch;
  margin: 0 0 1.6rem;
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  line-height: 1.88;
  color: var(--silver);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 40px 80px -50px rgba(0, 0, 0, .9);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .about-hero__media .about-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 1.8rem 1rem .9rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--silver);
  background: linear-gradient(180deg, transparent, rgba(4, 18, 29, .88));
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding-block: clamp(2.6rem, 7vw, 5.5rem);
}

.page-about .about-chapter--green {
  background: var(--ink-green);
  border-top: 1px solid var(--line);
}

.page-about .about-chapter--cream {
  background: var(--cream);
  color: var(--night);
}

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

.page-about .about-chapter--deep {
  background: var(--night-deep);
}

.page-about .about-chapter--ink {
  background: var(--ink-green);
}

.page-about .about-chapter__grid {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
}

.page-about .about-rail {
  display: grid;
  gap: .3rem;
  align-content: start;
}

.page-about .about-rail__num {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.9rem);
  line-height: 1;
  color: var(--turf);
}

.page-about .about-rail__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--silver);
}

.page-about .about-rail__note {
  margin: 0;
  font-size: .8rem;
  line-height: 1.6;
  color: var(--rock);
}

.page-about .about-chapter--cream .about-rail__num {
  color: var(--clay);
}

.page-about .about-chapter--cream .about-rail__year {
  color: var(--stand);
}

.page-about .about-h2 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.6vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -.015em;
  text-wrap: balance;
}

.page-about .about-text {
  max-width: 62ch;
  margin: 0 0 1rem;
  line-height: 1.92;
  color: var(--silver);
}

.page-about .about-chapter--cream .about-text {
  color: rgba(7, 26, 43, .78);
}

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  margin: 1.9rem 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-stat {
  display: grid;
  gap: .3rem;
  align-content: start;
  padding: 1.15rem 1.1rem;
  background: var(--ink-green);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--turf);
}

.page-about .about-stat__num small {
  margin-left: .12em;
  font-family: var(--font-body);
  font-size: .52em;
  color: var(--silver);
}

.page-about .about-stat__label {
  font-size: .82rem;
  line-height: 1.6;
  color: var(--rock);
}

/* ---------- 图文分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  align-items: center;
  margin-top: 1.9rem;
}

.page-about .about-split__text .about-text {
  margin-bottom: 0;
}

.page-about .about-split__media {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-split__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 三段节拍 ---------- */
.page-about .about-beats {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2.5vw, 1.5rem);
  margin: 2rem 0 0;
}

.page-about .about-beat {
  position: relative;
  padding: 1.45rem 1.3rem 1.55rem;
  border-radius: var(--r-md);
  background: rgba(7, 26, 43, .045);
  border: 1px solid rgba(7, 26, 43, .1);
  border-top: 3px solid var(--stand);
}

.page-about .about-beat:nth-child(2) {
  border-top-color: var(--signal);
}

.page-about .about-beat:nth-child(3) {
  border-top-color: var(--clay);
}

.page-about .about-beat__num {
  position: absolute;
  top: .85rem;
  right: 1.05rem;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.6rem;
  line-height: 1;
  color: rgba(7, 26, 43, .16);
}

.page-about .about-beat__time {
  display: block;
  margin: 0 0 .55rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--clay);
}

.page-about .about-beat__title {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: 1.12rem;
  letter-spacing: -.01em;
  color: var(--night);
}

.page-about .about-beat__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: rgba(7, 26, 43, .72);
}

.page-about .about-note {
  margin: 1.7rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(7, 26, 43, .14);
  font-size: .86rem;
  line-height: 1.85;
  color: rgba(7, 26, 43, .62);
}

.page-about .about-wide-media {
  margin: 1.9rem 0 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid rgba(7, 26, 43, .12);
  background: rgba(7, 26, 43, .05);
}

.page-about .about-wide-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-wide-media .about-caption {
  padding: .7rem 1rem .8rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: rgba(7, 26, 43, .6);
}

/* ---------- 标签页 ---------- */
.page-about .about-tabs {
  margin-top: 1.8rem;
}

.page-about .about-tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0;
  padding: 0 0 .85rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-tabs .tabs__tab {
  padding: .6rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-tabs .tabs__tab:hover {
  border-color: var(--turf);
  color: var(--turf);
}

.page-about .about-tabs .tabs__tab[aria-selected="true"] {
  background: var(--turf);
  border-color: var(--turf);
  color: var(--night-deep);
  font-weight: 700;
}

.page-about .about-tabs .tabs__tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-tabs .tabs__panel {
  padding-top: 1.5rem;
  animation: about-fade .22s var(--ease);
}

.page-about .about-tabs .tabs__panel:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
}

@keyframes about-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  display: grid;
  gap: 1.2rem;
}

.page-about .about-team__lead {
  margin: 0;
  line-height: 1.9;
  color: var(--silver);
}

.page-about .about-team__list {
  display: grid;
  gap: .7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 1.35rem;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: .5rem;
  height: .5rem;
  border-radius: 2px;
  background: var(--signal);
  transform: rotate(45deg);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 1.7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: .3rem;
  top: .5rem;
  bottom: .5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--turf), rgba(78, 214, 200, .4) 55%, transparent);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 1.8rem;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .42rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--night-deep);
  border: 2px solid var(--turf);
  box-shadow: 0 0 0 4px rgba(155, 255, 87, .12);
}

.page-about .about-timeline__year {
  margin: 0 0 .3rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .12em;
  color: var(--turf);
}

.page-about .about-timeline__title {
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-about .about-timeline__text {
  max-width: 58ch;
  margin: 0;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 社群块 ---------- */
.page-about .about-clubs {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(.85rem, 2vw, 1.2rem);
  margin-top: 1.9rem;
}

.page-about .about-club-block {
  display: grid;
  align-content: end;
  gap: .45rem;
  min-height: 8.5rem;
  padding: 1.4rem 1.3rem;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--stand);
}

.page-about .about-clubs__lg {
  min-height: 15rem;
  background:
    radial-gradient(120% 120% at 0% 0%, rgba(184, 106, 75, .9), transparent 68%),
    var(--ink-green);
}

.page-about .about-club-block__num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--turf);
}

.page-about .about-clubs__sm .about-club-block__num {
  font-size: clamp(1.35rem, 3vw, 1.85rem);
}

.page-about .about-club-block__label {
  font-size: .88rem;
  line-height: 1.72;
  color: var(--silver);
}

/* ---------- 可用性与联系 ---------- */
.page-about .about-support {
  display: grid;
  gap: clamp(1.3rem, 3vw, 2.4rem);
  margin-top: 1.7rem;
}

.page-about .about-metrics {
  display: grid;
  align-content: start;
}

.page-about .about-metric {
  display: grid;
  gap: .3rem;
  padding: 1.1rem 0;
  border-top: 1px solid rgba(7, 26, 43, .14);
}

.page-about .about-metric:last-child {
  border-bottom: 1px solid rgba(7, 26, 43, .14);
}

.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-size: clamp(1.65rem, 4vw, 2.4rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--stand);
}

.page-about .about-metric__label {
  font-size: .86rem;
  line-height: 1.65;
  color: rgba(7, 26, 43, .62);
}

.page-about .about-contact {
  padding: 1.4rem 1.25rem;
  border-radius: var(--r-md);
  background: rgba(7, 26, 43, .055);
  border: 1px solid rgba(7, 26, 43, .1);
}

.page-about .about-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: .2rem .9rem;
  margin: 0 0 .6rem;
  font-size: .92rem;
}

.page-about .about-contact__k {
  min-width: 4.4rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  line-height: 1.8;
  color: var(--rock);
}

.page-about .about-contact__row span:last-child {
  color: var(--night);
  overflow-wrap: anywhere;
}

.page-about .about-contact__hint {
  margin: 1rem 0 0;
  padding-top: .9rem;
  border-top: 1px dashed rgba(7, 26, 43, .2);
  font-size: .84rem;
  line-height: 1.8;
  color: rgba(7, 26, 43, .62);
}

/* ---------- 行动行 ---------- */
.page-about .about-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.7rem;
}

.page-about .about-chapter--cream .btn--line {
  color: var(--night);
  border-color: rgba(7, 26, 43, .32);
}

.page-about .about-chapter--cream .btn--line:hover {
  color: var(--stand);
  border-color: var(--stand);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-clubs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-clubs__lg {
    grid-column: span 2;
  }
}

@media (min-width: 760px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }

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

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 2.4rem;
    align-items: start;
  }

  .page-about .about-support {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (min-width: 800px) {
  .page-about .about-clubs {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    align-items: stretch;
  }

  .page-about .about-clubs__lg {
    grid-column: span 4;
    grid-row: span 2;
  }

  .page-about .about-clubs__sm {
    grid-column: span 2;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
  }
}

@media (min-width: 860px) {
  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 168px) minmax(0, 1fr);
    column-gap: clamp(2rem, 6vw, 5rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: 6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tabs .tabs__panel {
    animation: none;
  }

  .page-about * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}
<<<END>>>