.page-about {
  --about-line: rgba(143, 169, 184, 0.22);
  --about-line-soft: rgba(143, 169, 184, 0.12);
  --about-soft: rgba(242, 247, 240, 0.76);
  --about-card: rgba(3, 11, 18, 0.5);
  background:
    radial-gradient(120% 50% at 10% 0%, rgba(18, 76, 64, 0.5), rgba(7, 23, 38, 0) 60%),
    var(--night);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.72;
  overflow-x: clip;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about p {
  margin: 0;
}

.page-about .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0 0 clamp(14px, 3vw, 22px);
  padding: 0;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(143, 169, 184, 0.5);
}

.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 56px) 0 clamp(36px, 6vw, 76px);
  border-bottom: 2px solid var(--line-strong);
  background:
    radial-gradient(90% 70% at 88% 6%, rgba(18, 76, 64, 0.85), rgba(7, 23, 38, 0) 62%),
    linear-gradient(180deg, var(--night) 0%, #05202a 58%, var(--pitch) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--about-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--about-line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.28;
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
  align-items: end;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background: rgba(3, 11, 18, 0.4);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--lime);
  margin-bottom: clamp(12px, 2.5vw, 20px);
}

.page-about .about-kicker .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.16);
  animation: about-breathe 2.8s ease-in-out infinite;
}

.page-about .about-hero h1 {
  font-size: clamp(2rem, 7.2vw, 4.2rem);
  max-width: 20ch;
  margin-bottom: clamp(14px, 2.6vw, 22px);
}

.page-about .about-hero .lede {
  font-size: clamp(0.98rem, 1.6vw, 1.06rem);
  color: var(--about-soft);
  max-width: 56ch;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-about .about-panel {
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, rgba(18, 76, 64, 0.62), var(--about-card));
  box-shadow: var(--shadow-hard);
  padding: clamp(16px, 3vw, 22px);
}

.page-about .about-panel-title {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-about .about-panel-list {
  margin: 0;
}

.page-about .about-panel-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-top: 1px dashed var(--about-line);
}

.page-about .about-panel-row:first-child {
  border-top: 0;
}

.page-about .about-panel-row dt {
  font-size: 0.86rem;
  color: var(--mist);
}

.page-about .about-panel-row dd {
  margin: 0;
  font-size: 1.16rem;
  color: var(--lime);
}

.page-about .about-panel-note {
  margin-top: 12px;
  font-size: 0.78rem;
  color: rgba(242, 247, 240, 0.6);
}

.page-about .about-hero-media {
  position: relative;
  margin-top: clamp(24px, 4vw, 44px);
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1.05) contrast(1.03);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: clamp(40px, 7vw, 84px) 0;
  border-bottom: 2px solid var(--about-line-soft);
}

.page-about .about-section:nth-of-type(even) {
  background: linear-gradient(180deg, rgba(12, 59, 46, 0.55), rgba(7, 23, 38, 0.1));
}

.page-about .about-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 20px;
  margin-bottom: clamp(22px, 4vw, 36px);
}

.page-about .index-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--night);
  background: var(--lime);
  padding: 3px 9px;
  border-radius: 4px;
}

.page-about .about-head h2 {
  flex: 1 1 320px;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
}

.page-about .about-head .lede {
  flex: 1 1 100%;
  max-width: 66ch;
  font-size: 0.98rem;
  color: var(--about-soft);
}

/* ---------- 01 起点 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .about-prose p {
  font-size: clamp(0.95rem, 1.5vw, 1.02rem);
  color: rgba(242, 247, 240, 0.86);
  padding-left: 16px;
  border-left: 2px solid var(--about-line);
}

.page-about .about-prose p + p {
  margin-top: 16px;
}

.page-about .about-prose p:first-child {
  border-left-color: var(--lime);
  color: var(--paper);
}

.page-about .stat-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-content: start;
}

.page-about .stat-card {
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--about-card);
  padding: 14px 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 8px;
}

.page-about .stat-num {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  color: var(--lime);
  line-height: 1;
}

.page-about .stat-unit {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--lime);
}

.page-about .stat-label {
  flex: 1 1 100%;
  font-size: 0.82rem;
  color: var(--mist);
}

/* ---------- 02 团队 ---------- */
.page-about .team-bar-wrap {
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .team-bar {
  display: flex;
  width: 100%;
  height: 34px;
  border: 2px solid var(--line-strong);
  background: rgba(3, 11, 18, 0.5);
  overflow: hidden;
}

.page-about .team-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--night);
  border-right: 2px solid rgba(7, 23, 38, 0.85);
  transition: flex-grow 0.3s ease;
}

.page-about .team-seg:last-child {
  border-right: 0;
}

.page-about .seg-a { width: 39.1%; background: var(--lime); }
.page-about .seg-b { width: 26.1%; background: var(--cyan); }
.page-about .seg-c { width: 19.6%; background: var(--orange); }
.page-about .seg-d { width: 15.2%; background: var(--mist); }

.page-about .team-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  font-size: 0.8rem;
  color: var(--about-soft);
}

.page-about .team-legend li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 2px;
  display: inline-block;
}

.page-about .dot-a { background: var(--lime); }
.page-about .dot-b { background: var(--cyan); }
.page-about .dot-c { background: var(--orange); }
.page-about .dot-d { background: var(--mist); }

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 28px);
}

.page-about .team-media {
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.page-about .team-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .role-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .role-card {
  position: relative;
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: rgba(12, 59, 46, 0.5);
  padding: 14px 16px 14px 46px;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-about .role-card:hover,
.page-about .role-card:focus-within {
  transform: translate(-2px, -2px);
  border-color: var(--lime);
  box-shadow: 6px 6px 0 0 rgba(200, 255, 61, 0.18);
  outline: none;
}

.page-about .role-index {
  position: absolute;
  left: 14px;
  top: 15px;
  font-size: 0.76rem;
  color: var(--mist);
}

.page-about .role-card .card-title {
  font-size: 1.06rem;
  margin-bottom: 6px;
}

.page-about .role-main {
  font-size: 0.88rem;
  color: rgba(242, 247, 240, 0.82);
}

.page-about .role-more {
  font-size: 0.82rem;
  color: var(--mist);
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--about-line);
}

/* ---------- 03 时间线 ---------- */
.page-about .timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 36px);
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime), rgba(46, 211, 198, 0.45), rgba(143, 169, 184, 0.1));
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(20px, 3vw, 28px) 30px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--night);
  border: 3px solid var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.1);
}

.page-about .tl-year {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
  margin-bottom: 4px;
}

.page-about .tl-title {
  font-size: 1.08rem;
  margin-bottom: 5px;
}

.page-about .tl-text {
  font-size: 0.9rem;
  color: var(--about-soft);
  max-width: 56ch;
}

.page-about .board-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-content: start;
}

.page-about .board-card {
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: linear-gradient(150deg, rgba(18, 76, 64, 0.7), rgba(3, 11, 18, 0.6));
  padding: 14px;
}

.page-about .board-num {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--orange);
  line-height: 1.1;
}

.page-about .board-label {
  margin-top: 6px;
  font-size: 0.78rem;
  color: var(--about-soft);
}

/* ---------- 04 覆盖与合作 ---------- */
.page-about .coverage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 4vw, 34px);
}

.page-about .coverage-numbers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .coverage-tile {
  border-left: 4px solid var(--lime);
  background: rgba(3, 11, 18, 0.42);
  padding: 10px 14px;
}

.page-about .coverage-num {
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  color: var(--paper);
  line-height: 1.1;
}

.page-about .coverage-label {
  font-size: 0.84rem;
  color: var(--about-soft);
}

.page-about .coverage-note {
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: rgba(18, 76, 64, 0.38);
  padding: 16px;
}

.page-about .coverage-note p {
  font-size: 0.9rem;
  color: rgba(242, 247, 240, 0.86);
  margin-bottom: 14px;
}

.page-about .coverage-media {
  border: 2px solid var(--line-strong);
  box-shadow: var(--shadow-hard);
}

.page-about .coverage-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 05 做法与原则 ---------- */
.page-about .principle-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 2px solid var(--line-strong);
}

.page-about .principle-row {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 4px 12px;
  padding: 16px 0;
  border-bottom: 2px solid var(--line-strong);
}

.page-about .principle-index {
  font-size: 0.9rem;
  color: var(--cyan);
  grid-row: span 2;
  padding-top: 2px;
}

.page-about .principle-title {
  font-size: 1.06rem;
}

.page-about .principle-text {
  font-size: 0.9rem;
  color: var(--about-soft);
  max-width: 70ch;
}

/* ---------- 结尾引导 ---------- */
.page-about .about-next {
  padding: clamp(36px, 6vw, 70px) 0 clamp(44px, 7vw, 80px);
  background:
    radial-gradient(80% 120% at 15% 0%, rgba(200, 255, 61, 0.14), rgba(7, 23, 38, 0) 62%),
    var(--pitch);
}

.page-about .about-next-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 3vw, 28px);
  align-items: center;
}

.page-about .about-next-copy h2 {
  font-size: clamp(1.45rem, 4vw, 2.1rem);
  margin-bottom: 8px;
}

.page-about .about-next-copy p {
  font-size: 0.95rem;
  color: var(--about-soft);
  max-width: 58ch;
}

.page-about .about-next .btn-row {
  justify-content: flex-start;
}

@keyframes about-breathe {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

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

  .page-about .coverage-tile:first-child {
    grid-column: 1 / -1;
  }

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

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

  .page-about .principle-row {
    grid-template-columns: 44px minmax(0, 0.9fr) minmax(0, 1.6fr);
    align-items: baseline;
  }

  .page-about .principle-index {
    grid-row: auto;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-panel {
    align-self: end;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.4fr);
    align-items: start;
  }

  .page-about .timeline-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .board-stack {
    position: sticky;
    top: 96px;
  }

  .page-about .coverage-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .coverage-tile:first-child {
    grid-column: auto;
  }

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

  .page-about .about-next-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  }

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

@media (hover: hover) and (min-width: 720px) {
  .page-about .role-more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    transition: max-height 0.28s ease, opacity 0.24s ease, margin-top 0.24s ease, padding-top 0.24s ease;
  }

  .page-about .role-card:hover .role-more,
  .page-about .role-card:focus-within .role-more {
    max-height: 12em;
    opacity: 1;
    margin-top: 8px;
    padding-top: 8px;
    border-top-color: var(--about-line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-kicker .status-dot {
    animation: none;
  }

  .page-about .role-card,
  .page-about .role-more,
  .page-about .team-seg {
    transition: none;
  }

  .page-about .role-card:hover,
  .page-about .role-card:focus-within {
    transform: none;
  }
}
<<<END>>>