.page-about {
  --about-gap: clamp(1.6rem, 4vw, 3rem);
  --about-soft: rgba(17, 27, 61, .72);
  background: var(--void);
  color: var(--star);
  padding-top: calc(var(--header-h) + 1.2rem);
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  letter-spacing: -.015em;
}

.page-about .inline-link {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: .5rem 0 clamp(2.4rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(1.2rem, 3vw, 2rem);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.4rem);
  align-items: center;
}

.page-about h1 {
  font-size: clamp(2rem, 6.4vw, 3.6rem);
  font-weight: 800;
  line-height: 1.1;
  margin: .5rem 0 1rem;
  background: linear-gradient(118deg, var(--star) 34%, var(--cyan) 74%, var(--violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero .lede {
  color: var(--mist);
  font-size: clamp(.95rem, 2.4vw, 1.05rem);
  line-height: 1.8;
  max-width: 44ch;
}

.page-about .hero-stats {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .9rem 1.1rem;
}

.page-about .hero-stats li {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding-left: .85rem;
  border-left: 1px solid var(--line);
  min-width: 0;
}

.page-about .hero-stats .mono {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 3.4vw, 1.55rem);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.15;
}

.page-about .hero-stats li span:last-child {
  font-size: .78rem;
  color: var(--mist);
  line-height: 1.4;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.8rem;
}

.page-about .about-hero__stage {
  position: relative;
  display: grid;
  place-items: center;
  padding: clamp(1rem, 3vw, 1.6rem);
  min-height: 300px;
  aspect-ratio: 1 / 1.02;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    radial-gradient(circle at 72% 18%, rgba(138, 92, 255, .30), transparent 62%),
    radial-gradient(circle at 12% 86%, rgba(61, 231, 255, .16), transparent 58%),
    var(--deep);
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero__stage::before,
.page-about .about-hero__stage::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border: 1px solid var(--cyan);
  opacity: .55;
  z-index: 3;
}

.page-about .about-hero__stage::before {
  top: 14px;
  left: 14px;
  border-right: 0;
  border-bottom: 0;
  border-radius: 4px 0 0 0;
}

.page-about .about-hero__stage::after {
  right: 14px;
  bottom: 14px;
  border-left: 0;
  border-top: 0;
  border-radius: 0 0 4px 0;
}

.page-about .stage-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .48;
  z-index: 1;
}

.page-about .orbit {
  position: relative;
  z-index: 2;
  width: min(100%, 340px);
  aspect-ratio: 1 / 1;
}

.page-about .orbit svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .stage-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: .9rem;
  z-index: 3;
  margin: 0;
  text-align: center;
  font-size: .7rem;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 通用章节 ---------- */
.page-about .chapter-head {
  margin-bottom: clamp(1.4rem, 3vw, 2.2rem);
}

.page-about .chapter-num {
  display: block;
  font-size: clamp(.9rem, 2.4vw, 1.1rem);
  letter-spacing: .22em;
  color: var(--violet);
  margin-bottom: .4rem;
}

.page-about .chapter-title {
  font-size: clamp(1.6rem, 4.6vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  margin: 0;
}

.page-about .chapter-head .lede {
  margin: .8rem 0 0;
  max-width: 62ch;
  color: var(--mist);
  line-height: 1.8;
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .origin-grid {
  display: grid;
  gap: clamp(1.4rem, 3.5vw, 2.6rem);
}

.page-about .origin-body p {
  margin: 0 0 1rem;
  color: var(--mist);
  line-height: 1.85;
  font-size: clamp(.9rem, 2.3vw, .98rem);
}

.page-about .origin-points {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: .6rem;
}

.page-about .origin-points li {
  display: grid;
  grid-template-columns: 1.7rem minmax(0, 1fr);
  align-items: baseline;
  gap: .6rem;
  padding: .7rem .9rem;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--violet);
  border-radius: var(--r-sm);
  background: rgba(10, 18, 48, .55);
  font-size: .88rem;
  line-height: 1.6;
}

.page-about .origin-points .mono {
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: .82rem;
}

/* ---------- 02 使命与原则 ---------- */
.page-about .about-mission {
  background:
    radial-gradient(circle at 84% 0%, rgba(138, 92, 255, .16), transparent 55%),
    transparent;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .mission-statement {
  margin: 0 0 clamp(1.6rem, 4vw, 2.6rem);
  padding: clamp(1.2rem, 3.5vw, 2rem) clamp(1rem, 3vw, 1.8rem);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
  background: linear-gradient(100deg, rgba(255, 200, 87, .08), rgba(17, 27, 61, .5) 60%, transparent);
  font-family: var(--font-head);
  font-size: clamp(1.08rem, 3.2vw, 1.6rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--star);
}

.page-about .principles {
  display: grid;
  gap: 1rem;
}

.page-about .principle {
  position: relative;
  padding: 1.2rem 1.1rem 1.3rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(17, 27, 61, .9), rgba(10, 18, 48, .6));
  overflow: hidden;
}

.page-about .principle::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
}

.page-about .principle--gold::after { background: linear-gradient(90deg, var(--gold), transparent); }
.page-about .principle--cyan::after { background: linear-gradient(90deg, var(--cyan), transparent); }
.page-about .principle--violet::after { background: linear-gradient(90deg, var(--violet), transparent); }

.page-about .principle__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--mist);
  margin-bottom: .5rem;
}

.page-about .principle h3 {
  margin: 0 0 .55rem;
  font-size: clamp(1.1rem, 3vw, 1.32rem);
  font-weight: 800;
}

.page-about .principle p {
  margin: 0;
  color: var(--mist);
  font-size: .88rem;
  line-height: 1.8;
}

/* ---------- 03 里程碑 ---------- */
.page-about .about-timeline {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .milestones {
  list-style: none;
  margin: clamp(1.4rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 1.4rem;
}

.page-about .milestones::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--violet), var(--cyan) 62%, transparent);
}

.page-about .milestone {
  position: relative;
  padding-left: 2rem;
}

.page-about .milestone::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 10px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 200, 87, .14);
}

.page-about .milestone__year {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--violet);
  margin-bottom: .6rem;
  letter-spacing: -.02em;
}

.page-about .milestone__card {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(17, 27, 61, .92), rgba(10, 18, 48, .68));
  padding: 1rem 1.1rem 1.1rem;
}

.page-about .milestone__card h3 {
  margin: 0 0 .45rem;
  font-size: clamp(1rem, 2.8vw, 1.16rem);
  font-weight: 800;
}

.page-about .milestone__card p {
  margin: 0;
  color: var(--mist);
  font-size: .87rem;
  line-height: 1.8;
}

.page-about .milestone__card .mono {
  font-family: var(--font-mono);
  color: var(--cyan);
}

/* ---------- 04 空间与团队 ---------- */
.page-about .about-space {
  border-bottom: 1px solid var(--line-soft);
}

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

.page-about .space-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--deep);
}

.page-about .space-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .space-figure .media__caption {
  padding: .7rem 1rem;
  font-size: .76rem;
  color: var(--mist);
  line-height: 1.6;
  border-top: 1px solid var(--line-soft);
}

.page-about .space-panels {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-about .space-card {
  padding: 1.2rem 1.1rem 1.3rem;
}

.page-about .space-card h3 {
  margin: 0 0 .9rem;
  font-size: clamp(1rem, 2.8vw, 1.14rem);
  font-weight: 800;
  color: var(--cyan);
}

.page-about .space-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .8rem;
}

.page-about .space-list li {
  display: grid;
  gap: .2rem;
  padding-left: .8rem;
  border-left: 1px solid var(--line);
}

.page-about .space-list strong {
  font-size: .9rem;
  font-weight: 700;
  color: var(--star);
}

.page-about .space-list span {
  font-size: .84rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-eco {
  background:
    radial-gradient(circle at 8% 12%, rgba(61, 231, 255, .12), transparent 52%),
    transparent;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-about .eco-figure {
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--deep);
}

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

.page-about .eco-folds {
  display: grid;
  gap: .7rem;
}

.page-about .eco-folds .fold {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: rgba(17, 27, 61, .62);
  overflow: hidden;
}

.page-about .eco-folds .fold__head {
  cursor: pointer;
  padding: .85rem 1rem;
  font-size: .9rem;
  font-weight: 700;
  color: var(--star);
  list-style: none;
  position: relative;
  padding-right: 2.2rem;
}

.page-about .eco-folds .fold__head::-webkit-details-marker {
  display: none;
}

.page-about .eco-folds .fold__head::after {
  content: "+";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  color: var(--cyan);
  font-size: 1rem;
}

.page-about .eco-folds .fold[open] .fold__head::after {
  content: "−";
}

.page-about .eco-folds .fold__body {
  padding: 0 1rem .95rem;
}

.page-about .eco-folds .fold__body p {
  margin: 0;
  font-size: .85rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .eco-honor {
  margin-top: clamp(1.4rem, 3.5vw, 2rem);
  display: grid;
  gap: .7rem;
  padding: 1.1rem 1.1rem 1.2rem;
  border: 1px solid rgba(255, 200, 87, .3);
  border-radius: var(--r-lg);
  background: linear-gradient(120deg, rgba(255, 200, 87, .08), rgba(10, 18, 48, .6));
}

.page-about .eco-honor p {
  margin: 0;
  font-size: .87rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 06 适合谁 ---------- */
.page-about .about-fit {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .fit-grid {
  display: grid;
  gap: 1rem;
}

.page-about .fit-card {
  padding: 1.15rem 1.1rem 1.25rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, rgba(17, 27, 61, .88), rgba(10, 18, 48, .58));
}

.page-about .fit-card__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--cyan);
  border: 1px solid var(--line-cyan);
  border-radius: var(--pill);
  padding: .18rem .62rem;
  margin-bottom: .7rem;
}

.page-about .fit-card h3 {
  margin: 0 0 .5rem;
  font-size: clamp(1rem, 2.8vw, 1.12rem);
  font-weight: 800;
  line-height: 1.4;
}

.page-about .fit-card p {
  margin: 0;
  font-size: .86rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .fit-links {
  margin-top: clamp(1.4rem, 3.5vw, 2rem);
  display: flex;
  flex-wrap: wrap;
  gap: .6rem 1.4rem;
}

.page-about .fit-links a {
  font-size: .86rem;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 231, 255, .4);
  padding-bottom: .12rem;
}

.page-about .fit-links a:hover,
.page-about .fit-links a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  padding-bottom: clamp(2.4rem, 6vw, 4rem);
}

.page-about .cta-panel {
  position: relative;
  padding: clamp(1.4rem, 4.5vw, 2.6rem);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    radial-gradient(circle at 88% 10%, rgba(138, 92, 255, .30), transparent 58%),
    linear-gradient(140deg, var(--deep), var(--void));
  overflow: hidden;
}

.page-about .cta-panel h2 {
  margin: 0 0 .7rem;
  font-size: clamp(1.4rem, 4.2vw, 2.2rem);
  font-weight: 800;
  line-height: 1.25;
}

.page-about .cta-panel p {
  margin: 0;
  max-width: 56ch;
  font-size: .9rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.4rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .eco-honor {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
    gap: 1rem;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(2rem, 4vw, 3.6rem);
  }

  .page-about .about-hero__stage {
    aspect-ratio: 3 / 4;
    min-height: 460px;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    gap: clamp(1.6rem, 4vw, 3.4rem);
    align-items: start;
  }

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

  .page-about .milestones::before {
    left: 132px;
  }

  .page-about .milestone {
    display: grid;
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 2.6rem;
    padding-left: 0;
    align-items: start;
  }

  .page-about .milestone::before {
    left: 127px;
    top: 16px;
  }

  .page-about .milestone__year {
    text-align: right;
    margin-bottom: 0;
    padding-top: .1rem;
  }

  .page-about .space-grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: clamp(1.4rem, 3vw, 2.2rem);
  }

  .page-about .space-figure img {
    aspect-ratio: 4 / 4.2;
  }

  .page-about .eco-grid {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  }

  .page-about .fit-card:nth-child(even) {
    transform: translateY(1.5rem);
  }

  .page-about .fit-grid {
    padding-bottom: 1.5rem;
    gap: 1.1rem;
  }

  .page-about .cta-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: center;
    gap: 1.6rem;
  }

  .page-about .cta-actions {
    margin-top: 0;
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .fit-card:nth-child(even) {
    transform: none;
  }
}
<<<END>>>