.page-about {
  --about-cut: 18px;
  --about-card-bg: linear-gradient(152deg, rgba(14, 42, 71, .92), rgba(7, 26, 43, .78));
  --about-card-line: rgba(143, 163, 184, .22);
  background:
    radial-gradient(120% 55% at 88% 0%, rgba(47, 230, 214, .13), transparent 62%),
    radial-gradient(90% 45% at 4% 68%, rgba(108, 92, 231, .12), transparent 66%),
    linear-gradient(180deg, var(--deep) 0%, var(--navy) 38%, var(--deep) 100%);
  color: var(--mist);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: clamp(3rem, 7vw, 6rem);
  overflow-x: hidden;
}

.page-about p {
  margin: 0;
}

.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding-block: clamp(1rem, 2.6vw, 1.6rem);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-about .crumbs a {
  color: var(--steel-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}

.page-about .crumbs__sep {
  color: var(--line);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3vw, 2.75rem);
  align-items: start;
}

.page-about .about-rail {
  border: 1px solid var(--about-card-line);
  border-radius: 2px 22px 2px 22px;
  background: rgba(7, 26, 43, .55);
  padding: clamp(.95rem, 2.2vw, 1.35rem);
}

.page-about .about-rail__tag {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--about-card-line);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--steel);
}

.page-about .about-rail__num {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
  color: var(--cyan);
}

.page-about .about-rail__nav {
  display: grid;
  margin-top: .9rem;
  border-left: 1px solid var(--about-card-line);
}

.page-about .about-rail__nav a {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  margin-left: -1px;
  padding: .5rem 0 .5rem .95rem;
  border-left: 2px solid transparent;
  font-size: .9rem;
  color: var(--steel-2);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-rail__nav a span {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--teal);
}

.page-about .about-rail__nav a:hover,
.page-about .about-rail__nav a:focus-visible {
  color: var(--mist);
  border-left-color: var(--cyan);
  background: rgba(47, 230, 214, .07);
}

.page-about .about-rail__note {
  margin-top: 1.1rem;
  padding-top: .9rem;
  border-top: 1px solid rgba(143, 163, 184, .14);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .about-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: .85rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.95rem, 5.4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-about .about-hero__intro {
  margin-top: 1.1rem;
  max-width: 48ch;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  color: var(--steel-2);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: .7rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stats li {
  padding: .8rem .9rem;
  border: 1px solid rgba(143, 163, 184, .2);
  border-radius: 12px;
  background: rgba(7, 26, 43, .5);
}

.page-about .about-hero__stats b {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-hero__stats span {
  font-size: .76rem;
  color: var(--steel);
}

.page-about .about-hero__figure {
  position: relative;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid rgba(143, 163, 184, .22);
  border-radius: 2px 34px 2px 34px;
}

.page-about .about-hero__figure figcaption {
  margin-top: .75rem;
  padding-left: .9rem;
  border-left: 2px solid var(--coral);
  font-size: .8rem;
  color: var(--steel);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-section {
  padding-top: clamp(2.75rem, 6vw, 5rem);
}

.page-about .about-section__head {
  display: grid;
  gap: .55rem;
  max-width: 64ch;
}

.page-about .about-section__num {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .2em;
  color: var(--coral);
}

.page-about .about-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.4vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -.015em;
  color: var(--mist);
}

.page-about .about-section__lede {
  font-size: .97rem;
  color: var(--steel-2);
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: .85rem;
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 55px;
  top: .5rem;
  bottom: .5rem;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(47, 230, 214, .55) 18%, rgba(255, 107, 74, .55) 82%, transparent);
  display: none;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: .45rem;
}

.page-about .about-timeline__year {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: rgba(47, 230, 214, .42);
}

.page-about .about-timeline__panel {
  position: relative;
  padding: clamp(.9rem, 2vw, 1.3rem) clamp(1rem, 2.4vw, 1.55rem);
  border: 1px solid var(--about-card-line);
  border-radius: 2px 20px 2px 20px;
  background: var(--about-card-bg);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .about-timeline__panel:hover {
  border-color: var(--line-cyan);
  transform: translateY(-2px);
}

.page-about .about-timeline__stage {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-about .about-timeline__panel h3 {
  margin: .35rem 0 .5rem;
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 2vw, 1.22rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--mist);
}

.page-about .about-timeline__panel p:last-child {
  font-size: .92rem;
  color: var(--steel-2);
}

/* ---------- 六栏 ---------- */

.page-about .about-lines {
  display: grid;
  grid-template-columns: 1fr;
  gap: .8rem;
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-lines__item {
  position: relative;
  padding: clamp(1rem, 2.2vw, 1.35rem);
  border: 1px solid var(--about-card-line);
  border-top: 2px solid rgba(47, 230, 214, .45);
  border-radius: 2px 18px 2px 18px;
  background: rgba(7, 26, 43, .58);
  transition: background .2s var(--ease), border-top-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .about-lines__item:hover {
  background: rgba(14, 42, 71, .82);
  border-top-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .about-lines__num {
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--violet);
}

.page-about .about-lines__item h3 {
  margin: .4rem 0 .5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-lines__item p {
  font-size: .9rem;
  color: var(--steel-2);
}

.page-about .about-lines__meta {
  margin-top: .6rem;
  padding-top: .55rem;
  border-top: 1px dashed rgba(143, 163, 184, .2);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--steel);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.1rem, 2.6vw, 1.8rem);
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .about-team__cards {
  display: grid;
  gap: .8rem;
}

.page-about .about-card {
  padding: clamp(1rem, 2.2vw, 1.4rem);
  border: 1px solid var(--about-card-line);
  border-radius: 16px 2px 16px 2px;
  background: var(--about-card-bg);
}

.page-about .about-card__label {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-card h3 {
  margin: .45rem 0 .55rem;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--mist);
}

.page-about .about-card p:last-child {
  font-size: .9rem;
  color: var(--steel-2);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid rgba(143, 163, 184, .2);
  border-radius: 2px 26px 2px 26px;
}

.page-about .about-team__figure figcaption {
  margin-top: .65rem;
  font-size: .78rem;
  color: var(--steel);
}

.page-about .about-team__rhythm {
  display: grid;
  grid-template-columns: 1fr;
  gap: .7rem;
  margin-top: 1.1rem;
}

.page-about .about-team__beat {
  display: grid;
  gap: .3rem;
  padding: .85rem 1rem;
  border-left: 2px solid var(--amber);
  background: rgba(255, 200, 87, .06);
}

.page-about .about-team__beat span {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-about .about-team__beat p {
  font-size: .88rem;
  color: var(--steel-2);
}

/* ---------- 治理 ---------- */

.page-about .about-gov {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.1rem, 2.6vw, 1.8rem);
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .about-gov__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .7rem;
}

.page-about .about-gov__item {
  position: relative;
  padding: clamp(.9rem, 2vw, 1.2rem) clamp(.95rem, 2.2vw, 1.3rem) clamp(.9rem, 2vw, 1.2rem) clamp(2.4rem, 4vw, 3rem);
  border: 1px solid var(--about-card-line);
  background: rgba(7, 26, 43, .6);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-gov__idx {
  position: absolute;
  left: clamp(.7rem, 1.6vw, 1rem);
  top: clamp(.95rem, 2vw, 1.25rem);
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 600;
  color: var(--coral);
}

.page-about .about-gov__item h3 {
  margin: 0 0 .4rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-gov__item p {
  font-size: .88rem;
  color: var(--steel-2);
}

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

.page-about .about-gov__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid rgba(143, 163, 184, .2);
  border-radius: 22px 2px 22px 2px;
}

.page-about .about-gov__figure figcaption {
  margin-top: .65rem;
  padding-left: .85rem;
  border-left: 2px solid var(--violet);
  font-size: .78rem;
  color: var(--steel);
}

/* ---------- 覆盖与节奏 ---------- */

.page-about .about-reach {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.1rem, 2.6vw, 2rem);
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .about-reach__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-reach__stats li {
  display: grid;
  gap: .2rem;
  padding: .9rem;
  border: 1px solid rgba(143, 163, 184, .2);
  border-radius: 2px 16px 2px 16px;
  background: rgba(14, 42, 71, .6);
}

.page-about .about-reach__stats b {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--teal);
}

.page-about .about-reach__stats span {
  font-size: .76rem;
  color: var(--steel);
}

.page-about .about-reach__text {
  display: grid;
  gap: .85rem;
  font-size: .93rem;
  color: var(--steel-2);
}

.page-about .about-reach__links {
  padding-top: .8rem;
  border-top: 1px solid rgba(143, 163, 184, .18);
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--steel);
}

.page-about .about-reach__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

.page-about .about-reach__links a:hover,
.page-about .about-reach__links a:focus-visible {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

/* ---------- 合作 ---------- */

.page-about .about-partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.1rem, 2.6vw, 1.8rem);
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .about-partners__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(143, 163, 184, .2);
}

.page-about .about-partners__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .85rem;
  padding: 1rem .2rem;
  border-bottom: 1px solid rgba(143, 163, 184, .16);
  transition: background .2s var(--ease);
}

.page-about .about-partners__list li:hover {
  background: rgba(47, 230, 214, .05);
}

.page-about .about-partners__num {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .12em;
  color: var(--violet);
  padding-top: .2rem;
}

.page-about .about-partners__list h3 {
  margin: 0 0 .3rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-partners__list p {
  font-size: .88rem;
  color: var(--steel-2);
}

.page-about .about-partners__cta {
  align-self: start;
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  border: 1px solid var(--line-cyan);
  border-radius: 2px 24px 2px 24px;
  background: linear-gradient(150deg, rgba(47, 230, 214, .1), rgba(7, 26, 43, .7));
}

.page-about .about-partners__kicker {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--coral);
}

.page-about .about-partners__cta h3 {
  margin: .5rem 0 .6rem;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  font-weight: 700;
  line-height: 1.32;
  color: var(--mist);
}

.page-about .about-partners__cta p {
  font-size: .88rem;
  color: var(--steel-2);
}

.page-about .about-partners__btn {
  display: inline-block;
  margin-top: 1rem;
  padding: .62rem 1.25rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .08em;
  text-decoration: none;
  color: var(--deep);
  background: var(--cyan);
  border: 1px solid var(--cyan);
  border-radius: 2px 12px 2px 12px;
  transition: background .18s var(--ease), color .18s var(--ease), transform .18s var(--ease);
}

.page-about .about-partners__btn:hover,
.page-about .about-partners__btn:focus-visible {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--ink);
  transform: translateY(-2px);
}

/* ---------- 焦点可见 ---------- */

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-gov__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

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

  .page-about .about-timeline::before {
    display: block;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: clamp(1rem, 2.4vw, 2rem);
    align-items: start;
  }

  .page-about .about-timeline__year {
    padding-top: .15rem;
  }

  .page-about .about-timeline__panel::before {
    content: "";
    position: absolute;
    left: -14px;
    top: 1.5rem;
    width: 14px;
    height: 1px;
    background: var(--line-cyan);
    transform: rotate(-16deg);
    transform-origin: right center;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .about-gov {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-reach {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
  }
}

@media (min-width: 1120px) {
  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-reach__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__panel,
  .page-about .about-lines__item,
  .page-about .about-partners__btn {
    transition: none;
  }

  .page-about .about-timeline__panel:hover,
  .page-about .about-lines__item:hover,
  .page-about .about-partners__btn:hover {
    transform: none;
  }
}
<<<END>>>