.page-about {
  --about-block: clamp(56px, 8vw, 104px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(20px, 4vw, 48px));
  padding-bottom: clamp(36px, 6vw, 72px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(76vw, 760px);
  height: clamp(200px, 32vw, 360px);
  background: linear-gradient(135deg, rgba(43, 227, 201, .12) 0%, rgba(43, 227, 201, 0) 64%);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  pointer-events: none;
}

.page-about .breadcrumb {
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-hero-grid {
  align-items: start;
  gap: clamp(28px, 4.5vw, 60px);
}

.page-about .about-hero-copy h1 {
  margin: clamp(12px, 2vw, 20px) 0 0;
  font-size: clamp(1.75rem, 4.4vw, 3.25rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-hero-copy .lede {
  margin-top: clamp(16px, 2.5vw, 24px);
  max-width: 46ch;
  color: var(--mist);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 24px);
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(18px, 2.5vw, 26px);
  border-top: 1px solid var(--line);
}

.page-about .about-hero-stats .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 4vw, 2.125rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-hero-stats .stat-value--neon {
  color: var(--neon);
}

.page-about .about-hero-stats .stat-value--orange {
  color: var(--orange);
}

.page-about .about-hero-stats .stat-label {
  display: block;
  margin-top: 8px;
  font-size: var(--s12);
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-hero-media .media-frame {
  border: 1px solid var(--line);
}

.page-about .about-origin-grid,
.page-about .coverage-grid,
.page-about .following-grid,
.page-about .xian-grid {
  gap: clamp(28px, 4.5vw, 56px);
}

.page-about .about-origin-note {
  padding: clamp(20px, 3vw, 28px);
}

.page-about .about-note-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-note-list li {
  position: relative;
  padding-left: 18px;
  font-size: var(--s15);
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-note-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 1px;
  background: var(--neon);
}

.page-about .about-timeline-lede {
  max-width: 56ch;
  color: var(--mist);
  margin-top: clamp(16px, 2.5vw, 24px);
}

.page-about .timeline {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .timeline-item {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .timeline-trigger {
  display: grid;
  grid-template-columns: 4.5rem 1fr auto;
  grid-template-areas: "year title icon";
  align-items: baseline;
  gap: 0 clamp(12px, 2vw, 28px);
  width: 100%;
  padding: clamp(18px, 2.6vw, 26px) 0;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .timeline-year {
  grid-area: year;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--s13);
  letter-spacing: 0.1em;
  color: var(--neon);
}

.page-about .timeline-title {
  grid-area: title;
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  font-weight: 600;
  color: var(--cream);
  transition: color 0.2s ease;
}

.page-about .timeline-trigger:hover .timeline-title,
.page-about .timeline-trigger:focus-visible .timeline-title {
  color: var(--neon);
}

.page-about .timeline-trigger .accordion-icon {
  grid-area: icon;
  align-self: center;
}

.page-about .accordion-icon {
  position: relative;
  display: block;
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.page-about .accordion-icon::before,
.page-about .accordion-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 1.5px;
  background: var(--neon);
  transform: translate(-50%, -50%);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.page-about .accordion-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-about .timeline-trigger[aria-expanded="true"] .accordion-icon::after {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-about .timeline-panel .accordion-panel-inner {
  padding: 0 0 clamp(20px, 3vw, 28px) calc(4.5rem + clamp(12px, 2vw, 28px));
}

.page-about .timeline-panel p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--s15);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-team-lede {
  max-width: 58ch;
  color: var(--mist);
  margin-top: clamp(16px, 2.5vw, 24px);
}

.page-about .team-stack {
  display: flex;
  height: 14px;
  margin-top: clamp(28px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .team-stack-seg {
  flex: 0 0 var(--seg, 0%);
  background: var(--seg-tone, var(--moss));
  border-right: 1px solid rgba(4, 18, 15, .6);
}

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

.page-about .team-legend {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
}

.page-about .team-legend-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "name count"
    "note note";
  gap: 6px clamp(12px, 2vw, 20px);
  padding: clamp(16px, 2.2vw, 22px) 0 clamp(16px, 2.2vw, 22px) clamp(16px, 2vw, 22px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-legend-item:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-about .team-legend-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: clamp(21px, 2.7vw, 27px);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--seg-tone, var(--neon));
}

.page-about .team-legend-name {
  grid-area: name;
  font-size: var(--s17);
  font-weight: 600;
  color: var(--cream);
}

.page-about .team-legend-count {
  grid-area: count;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--s15);
  color: var(--seg-tone, var(--orange));
}

.page-about .team-legend-note {
  grid-area: note;
  margin: 0;
  max-width: 66ch;
  font-size: var(--s15);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .coverage-anchor {
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
  align-content: start;
}

.page-about .coverage-stat {
  padding-left: clamp(14px, 2vw, 20px);
  border-left: 2px solid var(--neon);
}

.page-about .coverage-stat .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2rem, 6vw, 3.25rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cream);
}

.page-about .coverage-stat .stat-value--neon {
  color: var(--neon);
}

.page-about .coverage-stat .stat-value--orange {
  color: var(--orange);
}

.page-about .coverage-stat .stat-label {
  display: block;
  margin-top: 8px;
  font-size: var(--s13);
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .coverage-points {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: clamp(16px, 2vw, 22px) 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 12px;
}

.page-about .coverage-points li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: var(--s15);
  line-height: 1.7;
  color: var(--mist);
}

.page-about .coverage-point-num {
  flex: 0 0 3rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--s20);
  color: var(--orange);
}

.page-about .following-media .media-frame {
  border: 1px solid var(--line);
}

.page-about .following-rail {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .following-rail .rail-track {
  display: flex;
  gap: clamp(14px, 2vw, 22px);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 8px;
  scrollbar-width: none;
}

.page-about .following-rail .rail-track::-webkit-scrollbar {
  display: none;
}

.page-about .following-card {
  flex: 0 0 min(80vw, 300px);
  scroll-snap-align: start;
  padding: clamp(20px, 3vw, 28px);
  background: var(--rock);
  border: 1px solid var(--line);
  border-top: 2px solid var(--neon);
  border-radius: var(--radius);
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .following-card-num {
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.14em;
  color: var(--neon);
}

.page-about .following-card-title {
  margin: 0;
  font-size: var(--s20);
  color: var(--cream);
}

.page-about .following-card p {
  margin: 0;
  font-size: var(--s15);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .following-rail .rail-nav {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.page-about .reasons-grid {
  margin-top: clamp(24px, 3.5vw, 36px);
  gap: clamp(16px, 2.2vw, 26px);
}

.page-about .reason-card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: clamp(22px, 3vw, 30px);
  box-shadow: 6px 6px 0 0 rgba(62, 107, 82, .18);
}

.page-about .reason-num {
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.14em;
  color: var(--neon);
}

.page-about .reason-title {
  margin: 0;
  font-size: var(--s20);
  color: var(--cream);
}

.page-about .reason-text {
  margin: 0;
  font-size: var(--s15);
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-xian {
  position: relative;
  overflow: hidden;
}

.page-about .about-xian::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -70px;
  width: 240px;
  height: 240px;
  background:
    repeating-linear-gradient(45deg, rgba(43, 227, 201, .07) 0 1px, transparent 1px 12px),
    repeating-linear-gradient(-45deg, rgba(196, 105, 74, .06) 0 1px, transparent 1px 12px);
  pointer-events: none;
}

.page-about .xian-copy .section-num {
  display: block;
  margin-bottom: 10px;
}

.page-about .xian-copy .section-band {
  margin: 12px 0 clamp(16px, 2.5vw, 24px);
}

.page-about .about-more {
  padding-top: clamp(40px, 6vw, 72px);
  padding-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-more-inner {
  border-top: 1px solid var(--line);
  padding-top: clamp(28px, 4vw, 44px);
}

.page-about .about-more-title {
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-size: clamp(1.375rem, 2.6vw, 2.125rem);
  color: var(--cream);
}

.page-about .about-more-links {
  display: grid;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-more-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease, padding-left 0.25s ease;
}

.page-about .about-more-link:hover,
.page-about .about-more-link:focus-visible {
  color: var(--neon);
  padding-left: 10px;
  text-decoration: none;
}

.page-about .about-more-k {
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.14em;
  color: var(--mist);
  transition: color 0.2s ease;
}

.page-about .about-more-link:hover .about-more-k,
.page-about .about-more-link:focus-visible .about-more-k {
  color: var(--neon);
}

.page-about .about-more-v {
  font-size: var(--s17);
  color: var(--cream);
  text-align: right;
  transition: color 0.2s ease;
}

.page-about .about-more-link:hover .about-more-v,
.page-about .about-more-link:focus-visible .about-more-v {
  color: var(--neon);
}

@media (max-width: 900px) {
  .page-about .about-hero-copy h1 {
    font-size: clamp(1.625rem, 6vw, 2.25rem);
  }

  .page-about .coverage-anchor {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(12px, 3vw, 20px);
  }

  .page-about .coverage-stat {
    padding-left: 12px;
  }

  .page-about .about-more-link {
    flex-wrap: wrap;
  }

  .page-about .about-more-v {
    text-align: left;
  }
}

@media (max-width: 700px) {
  .page-about .timeline-trigger {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "year icon"
      "title title";
    gap: 8px 16px;
  }

  .page-about .timeline-panel .accordion-panel-inner {
    padding-left: 0;
  }

  .page-about .about-hero-stats {
    gap: 14px;
  }

  .page-about .about-hero-stats .stat-value {
    font-size: clamp(1.375rem, 7vw, 1.75rem);
  }

  .page-about .coverage-anchor {
    grid-template-columns: 1fr;
  }

  .page-about .following-card {
    flex: 0 0 min(86vw, 280px);
  }

  .page-about .team-stack {
    height: 12px;
  }
}

@media (max-width: 460px) {
  .page-about .about-hero-stats .stat-label {
    font-size: 11px;
    letter-spacing: 0.04em;
  }

  .page-about .coverage-point-num {
    flex: 0 0 2.4rem;
    font-size: var(--s17);
  }

  .page-about .about-more-k {
    letter-spacing: 0.08em;
  }
}

.page-about {
  --seg: transparent;
  --seg-tone: transparent;
}