.page-about {
  --about-mark-size: clamp(2.6rem, 7vw, 5rem);
  --about-rule: 1px solid var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero__copy {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2rem, 7vw, 3.9rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-about .about-hero__title em {
  display: inline-block;
  font-style: normal;
  color: var(--mint);
  background: linear-gradient(transparent 68%, rgba(182, 255, 59, 0.16) 68%);
  padding-inline-end: 0.12em;
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-hero__figure {
  margin: 0;
  border: var(--about-rule);
  background: var(--panel);
}

.page-about .about-hero__figure .media-frame {
  height: 100%;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: stretch;
  }

  .page-about .about-hero__copy {
    padding-top: 1rem;
    justify-content: center;
  }
}

/* ---------- 概况数字条 ---------- */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  background: var(--line);
  border-block: var(--about-rule);
}

.page-about .about-stats__cell {
  background: var(--ink-900);
  padding: 1.35rem clamp(0.9rem, 2.5vw, 1.9rem);
}

.page-about .about-stats .stat {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about .about-stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 5vw, 2.8rem);
  line-height: 1;
  color: var(--fog);
}

.page-about .about-stats .stat--amber .stat__value {
  color: var(--amber);
}

.page-about .about-stats .stat__label {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--muted);
  letter-spacing: 0.02em;
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 通用小标题 ---------- */
.page-about .about-h2 {
  margin: 0 0 0.9rem;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.4vw, 2.15rem);
  line-height: 1.28;
  color: var(--fog);
}

.page-about .about-origin__body p,
.page-about .about-team__body p,
.page-about .about-map__head p,
.page-about .about-eco__head p,
.page-about .about-why__head p {
  margin: 0 0 1rem;
  max-width: 64ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 1rem;
  border-bottom: var(--about-rule);
  padding-bottom: clamp(2rem, 5vw, 3.2rem);
}

.page-about .about-origin__mark {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--about-mark-size);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
  letter-spacing: 0.04em;
}

.page-about .about-points {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-about .about-points li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: baseline;
  padding-bottom: 0.75rem;
  border-bottom: var(--about-rule);
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--fog);
}

.page-about .about-points__num {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--mint);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

@media (min-width: 860px) {
  .page-about .about-origin {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .about-origin__mark {
    align-self: start;
    padding-top: 0.3rem;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline-wrap {
  border-bottom: var(--about-rule);
  padding-bottom: clamp(2rem, 5vw, 3.2rem);
}

.page-about .about-timeline {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3rem);
}

.page-about .timeline {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0 0 0 1.75rem;
  border-left: 1px solid var(--line);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: 1.6rem;
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  top: 0.45rem;
  left: calc(-1.75rem - 4.5px);
  width: 8px;
  height: 8px;
  background: var(--mint);
}

.page-about .timeline__item:nth-child(5)::before {
  background: var(--amber);
}

.page-about .timeline__year {
  margin: 0 0 0.3rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .timeline__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .timeline__desc {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
  max-width: 56ch;
}

.page-about .about-timeline__figure {
  margin: 0;
  border: var(--about-rule);
  background: var(--panel);
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-about .about-timeline__figure {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
  border-bottom: var(--about-rule);
  padding-bottom: clamp(2rem, 5vw, 3.2rem);
}

.page-about .about-team__figure {
  margin: 0;
  border: var(--about-rule);
  background: var(--panel);
  order: -1;
}

.page-about .team-bars {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .team-bar {
  display: grid;
  gap: 0.42rem;
}

.page-about .team-bar__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  font-size: 0.88rem;
  color: var(--fog);
}

.page-about .team-bar__name {
  letter-spacing: 0.04em;
}

.page-about .team-bar__value {
  font-family: var(--font-mono);
  color: var(--amber);
}

.page-about .team-bar__track {
  display: block;
  height: 10px;
  background: var(--line);
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  width: 0;
  background: var(--mint);
  transition: width 0.6s var(--ease);
}

.page-about .team-bar:nth-child(1) .team-bar__fill { width: 37.5%; }
.page-about .team-bar:nth-child(2) .team-bar__fill { width: 29.2%; background: var(--link); }
.page-about .team-bar:nth-child(3) .team-bar__fill { width: 20.8%; background: var(--amber); }
.page-about .team-bar:nth-child(4) .team-bar__fill { width: 12.5%; background: var(--rose); }

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-team__figure {
    order: 0;
  }
}

/* ---------- 内容体系 ---------- */
.page-about .about-map {
  border-bottom: var(--about-rule);
  padding-bottom: clamp(2rem, 5vw, 3.2rem);
}

.page-about .about-map__head {
  display: grid;
  gap: 0.2rem;
}

.page-about .about-map__tabs {
  margin-top: 1.6rem;
}

.page-about .about-map__tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-bottom: var(--about-rule);
  padding-bottom: 0.8rem;
}

.page-about .about-map__tabs .tab {
  appearance: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  padding: 0.55rem 0.85rem;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-map__tabs .tab:hover,
.page-about .about-map__tabs .tab:focus-visible {
  color: var(--fog);
  border-color: var(--muted);
}

.page-about .about-map__tabs .tab[aria-selected="true"] {
  background: var(--mint);
  border-color: var(--mint);
  color: var(--on-mint);
  font-weight: 700;
}

.page-about .about-map__tabs .tabs__panel {
  padding-top: 1.4rem;
  animation: about-fade var(--dur) var(--ease);
}

.page-about .about-map__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .about-map__tabs .tabs__panel p {
  margin: 0 0 0.85rem;
  max-width: 66ch;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-map__link {
  margin-top: 0.4rem;
}

.page-about .about-link {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 211, 183, 0.45);
  font-size: 0.92rem;
  padding-bottom: 1px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--mint);
  border-bottom-color: var(--mint);
}

@keyframes about-fade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 合作与认可 ---------- */
.page-about .about-eco {
  border-bottom: var(--about-rule);
  padding-bottom: clamp(2rem, 5vw, 3.2rem);
}

.page-about .about-eco__grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-about .about-eco__card {
  padding: 1.4rem 1.3rem;
  border: var(--about-rule);
  background: var(--panel);
}

.page-about .about-eco__card h3 {
  margin: 0.7rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--fog);
}

.page-about .about-eco__card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-eco__card .tag {
  margin: 0;
}

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

/* ---------- 选择理由 ---------- */
.page-about .about-why {
  border-bottom: var(--about-rule);
  padding-bottom: clamp(2rem, 5vw, 3.2rem);
}

.page-about .about-why__list {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--about-rule);
}

.page-about .about-why__item {
  background: var(--ink-900);
  padding: 1.4rem 1.25rem;
  display: grid;
  gap: 0.4rem;
  align-content: start;
}

.page-about .about-why__num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--mint);
}

.page-about .about-why__item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .about-why__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

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

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  padding-block: clamp(2rem, 5vw, 3rem) clamp(2.4rem, 6vw, 4rem);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 1.4rem;
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border-left: 3px solid var(--mint);
  background: var(--panel);
}

.page-about .about-cta__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  line-height: 1.3;
  color: var(--fog);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 60ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.2fr) auto;
    align-items: center;
    gap: 2rem;
  }

  .page-about .about-cta__inner .btn-row {
    justify-content: flex-end;
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-map__tabs .tabs__panel {
    animation: none;
  }

  .page-about .team-bar__fill {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>