.page-about {
  --about-grid-line: rgba(140, 147, 184, 0.16);
  --about-line: rgba(140, 147, 184, 0.22);
  --about-gap: clamp(16px, 3vw, 28px);
  background: var(--void);
  color: var(--fog);
  font-family: var(--font-body);
  line-height: 1.8;
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 3.6vw, 2.5rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  margin: 10px 0 0;
  color: var(--fog);
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 208, 0.45);
  padding-bottom: 1px;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(44px, 7vw, 84px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  left: -14%;
  right: -14%;
  top: -16%;
  height: 86%;
  transform: skewY(-4deg);
  transform-origin: left top;
  background:
    linear-gradient(135deg, rgba(36, 27, 77, 0.96) 0%, rgba(12, 21, 51, 0.96) 54%, rgba(56, 242, 208, 0.14) 100%);
  border-bottom: 2px solid var(--haze);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 68px 68px;
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 76%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  align-items: start;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 4.2rem);
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin: 14px 0 0;
  max-width: 15em;
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 64px;
  height: 6px;
  margin-top: 22px;
  background: var(--orange);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 34em;
  color: var(--fog);
  font-size: clamp(1rem, 1.6vw, 1.08rem);
  line-height: 1.85;
}

.page-about .about-hero__aside {
  display: grid;
  gap: clamp(16px, 2.5vw, 22px);
}

.page-about .about-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: var(--edge);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-metrics li {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--deep);
}

.page-about .about-metrics__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-metrics__label {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--star);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: var(--edge);
  border-radius: var(--radius);
  background: var(--deep);
  box-shadow: var(--hard-cyan);
}

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

.page-about .media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 26px 14px 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  line-height: 1.5;
  color: var(--star);
  background: linear-gradient(0deg, rgba(7, 11, 26, 0.94), rgba(7, 11, 26, 0));
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding: clamp(40px, 6vw, 88px) 0;
}

.page-about .about-duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

.page-about .about-duo__index {
  margin: 0;
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .about-duo__note {
  margin: 18px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--haze);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--star);
}

.page-about .about-duo__body > p {
  margin: 0 0 1.1em;
  max-width: 66ch;
}

.page-about .about-duo__body > p:last-child {
  margin-bottom: 0;
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  position: relative;
}

.page-about .about-quote {
  margin: clamp(26px, 4vw, 40px) 0;
  padding: 4px 0 4px clamp(16px, 3vw, 24px);
  border-left: 3px solid var(--cyan);
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.1rem, 2.2vw, 1.5rem);
  line-height: 1.65;
  color: var(--fog);
  max-width: 32em;
}

/* ---------- 服务范围 ---------- */
.page-about .about-reach {
  position: relative;
  background:
    linear-gradient(180deg, rgba(12, 21, 51, 0.95) 0%, rgba(36, 27, 77, 0.55) 100%);
  border-top: var(--edge);
  border-bottom: var(--edge);
}

.page-about .about-reach__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-reach__text {
  margin: 18px 0 0;
  color: var(--fog);
  line-height: 1.85;
}

.page-about .about-reach__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-line);
  border-top: 1px solid var(--about-line);
}

.page-about .reach-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 20px 4px;
  background: rgba(7, 11, 26, 0.35);
}

.page-about .reach-item__index {
  grid-row: span 2;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .reach-item__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.45;
  color: var(--fog);
}

.page-about .reach-item__body {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--star);
  max-width: 58ch;
}

/* ---------- 团队 ---------- */
.page-about .about-duo--team {
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-team__figure {
  position: relative;
  margin: clamp(20px, 3vw, 28px) 0 0;
  overflow: hidden;
  border: var(--edge);
  border-radius: var(--radius);
  box-shadow: var(--hard);
  background: var(--deep);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .team-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .team-card {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--deep);
  border: var(--edge);
  border-radius: var(--radius);
  box-shadow: var(--hard);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--cyan);
  box-shadow: var(--hard-cyan);
}

.page-about .team-card__index {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--haze);
}

.page-about .team-card__role {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  line-height: 1.4;
  color: var(--fog);
}

.page-about .team-card__count {
  margin: 6px 0 0;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: -0.01em;
}

.page-about .team-card__desc {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--star);
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestones {
  background:
    linear-gradient(180deg, rgba(12, 21, 51, 0.92), rgba(7, 11, 26, 1));
  border-top: var(--edge);
  border-bottom: var(--edge);
}

.page-about .about-milestones__banner {
  position: relative;
  margin: 0 0 clamp(24px, 4vw, 40px);
  overflow: hidden;
  border: var(--edge);
  border-radius: var(--radius);
  background: var(--galaxy);
}

.page-about .about-milestones__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 5;
  object-fit: cover;
  opacity: 0.9;
}

.page-about .milestones__track {
  list-style: none;
  margin: 0;
  padding: 0 0 16px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(216px, 1fr);
  gap: 14px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .milestones__track:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .milestone {
  scroll-snap-align: start;
  position: relative;
  padding: 22px 18px 20px;
  background: rgba(36, 27, 77, 0.62);
  border: var(--edge);
  border-radius: var(--radius);
}

.page-about .milestone::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 46px;
  height: 4px;
  background: var(--orange);
}

.page-about .milestone__year {
  margin: 0;
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .milestone__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--fog);
}

.page-about .milestone__text {
  margin: 10px 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--star);
}

/* ---------- 协作生态 ---------- */
.page-about .about-eco {
  position: relative;
}

.page-about .eco-stats {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .eco-stat {
  display: grid;
  grid-template-columns: minmax(0, 78px) minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  background: var(--galaxy);
  border: var(--edge);
  border-radius: var(--radius);
}

.page-about .eco-stat__num {
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
  letter-spacing: -0.02em;
}

.page-about .eco-stat__label {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--fog);
}

/* ---------- 合作路径 ---------- */
.page-about .about-partner {
  padding-top: clamp(32px, 5vw, 72px);
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .partner-card {
  position: relative;
  padding: 24px 20px 20px;
  background: var(--deep);
  border: var(--edge);
  border-radius: var(--radius);
  box-shadow: var(--hard);
  display: grid;
  align-content: start;
}

.page-about .partner-card__tag {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .partner-card__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.1rem, 2.4vw, 1.3rem);
  line-height: 1.4;
  color: var(--fog);
}

.page-about .partner-card__desc {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--star);
}

.page-about .partner-card__more {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--about-line);
}

.page-about .partner-card__more summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--cyan);
  padding: 4px 0;
}

.page-about .partner-card__more summary::-webkit-details-marker {
  display: none;
}

.page-about .partner-card__more summary::after {
  content: " +";
  color: var(--orange);
}

.page-about .partner-card__more[open] summary::after {
  content: " −";
}

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

.page-about .partner-card__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .partner-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--star);
}

.page-about .partner-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background: var(--haze);
  border-radius: 1px;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: clamp(8px, 2vw, 24px);
  padding: clamp(32px, 5vw, 56px) 0;
  background:
    linear-gradient(115deg, rgba(255, 106, 43, 0.16) 0%, rgba(36, 27, 77, 0.85) 46%, rgba(12, 21, 51, 0.95) 100%);
  border-top: var(--edge);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 3.4vw, 2.1rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--fog);
}

.page-about .about-cta__text {
  margin: 12px 0 0;
  max-width: 52ch;
  color: var(--star);
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__meta {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--star);
}

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

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

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

  .page-about .eco-stat {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
    gap: 6px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: end;
  }

  .page-about .about-duo {
    grid-template-columns: minmax(0, 3.5fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-duo__side {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-reach__head {
    max-width: 58ch;
  }

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

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    align-items: end;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .about-cta__meta {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1080px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .milestones__track {
    grid-auto-columns: minmax(240px, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus-within {
    transform: none;
  }

  .page-about .milestones__track {
    scroll-behavior: auto;
  }
}
<<<END>>>