.page-about {
  --about-rail-w: 168px;
  --about-gap: 48px;
  background: var(--c-pitch);
  color: var(--c-white);
}

/* ---------- HERO ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 96px var(--gutter) 56px;
  border-bottom: 1px solid var(--hairline);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(59, 240, 208, 0.10), transparent 62%),
    linear-gradient(180deg, var(--c-pitch) 0%, #052722 100%);
}

.page-about .hero-grid-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.28;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
}

.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 34px;
}

.page-about .about-hero .breadcrumb a {
  color: var(--c-index);
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--c-neon);
}

.page-about .about-hero .breadcrumb-item[aria-current="page"] {
  color: var(--c-neon);
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
}

.page-about .hero-eyebrow {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-index);
}

.page-about .eyebrow-idx {
  color: var(--c-neon);
}

.page-about .about-hero-title {
  margin: 0 0 26px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 8vw, 88px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--c-white);
  max-width: 16em;
}

.page-about .about-hero-lead {
  margin: 0 0 40px;
  max-width: 40em;
  font-family: var(--font-body);
  font-size: var(--step-2);
  line-height: 1.85;
  color: #c6ddd8;
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--glass-line);
  background: var(--glass-line);
}

.page-about .hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: rgba(10, 47, 40, 0.72);
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-4);
  font-weight: 600;
  color: var(--c-neon);
  letter-spacing: -0.01em;
}

.page-about .fact-label {
  font-size: var(--step-0);
  letter-spacing: 0.1em;
  color: var(--c-index);
}

/* ---------- BODY FRAME ---------- */

.page-about .about-body {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-about .about-rail {
  padding: 28px 0 4px;
  border-bottom: 1px solid var(--hairline);
}

.page-about .rail-head {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-index);
}

.page-about .rail-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .rail-index a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.06em;
  color: var(--c-index);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .rail-index a:hover,
.page-about .rail-index a:focus-visible {
  color: var(--c-neon);
  border-bottom-color: var(--c-neon);
}

.page-about .about-flow {
  padding-bottom: 72px;
}

/* ---------- SECTION SHELL ---------- */

.page-about .about-section {
  padding: 56px 0 20px;
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-section:last-child {
  border-bottom: 0;
}

.page-about .section-head {
  max-width: 46em;
  margin-bottom: 36px;
}

.page-about .section-index {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-neon-deep);
}

.page-about .section-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.15;
  color: var(--c-white);
}

.page-about .section-sub {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-2);
  line-height: 1.8;
  color: var(--c-index);
}

.page-about .prose {
  margin: 0 0 18px;
  font-family: var(--font-body);
  font-size: var(--step-2);
  line-height: 1.85;
  color: #c6ddd8;
  max-width: 38em;
}

.page-about .media-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--glass-line);
  background: var(--c-locker);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: var(--ratio, 16 / 9);
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .about-figure {
  margin-bottom: 32px;
}

/* ---------- TEAM ---------- */

.page-about .team-grid {
  display: grid;
  gap: 1px;
  background: var(--glass-line);
  border: 1px solid var(--glass-line);
}

.page-about .team-card {
  position: relative;
  padding: 26px 22px 28px;
  background: var(--c-locker);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 0;
  background: var(--c-neon);
  transition: height 0.28s var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  background: var(--c-glass);
  box-shadow: 0 0 0 1px rgba(59, 240, 208, 0.35) inset;
}

.page-about .team-card:hover::before,
.page-about .team-card:focus-within::before {
  height: 100%;
}

.page-about .team-count {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-6);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-neon);
}

.page-about .team-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-3);
  color: var(--c-white);
}

.page-about .team-role {
  margin: 0 0 12px;
  font-size: var(--step-0);
  letter-spacing: 0.06em;
  color: var(--c-timer);
}

.page-about .team-detail {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.8;
  color: #b6cfca;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.32s var(--ease), opacity 0.28s var(--ease), margin 0.28s var(--ease);
}

.page-about .team-card:hover .team-detail,
.page-about .team-card:focus-within .team-detail {
  max-height: 14em;
  opacity: 1;
  margin-top: 2px;
}

@media (hover: none) {
  .page-about .team-detail {
    max-height: 14em;
    opacity: 1;
  }
}

/* ---------- TIMELINE ---------- */

.page-about .track-figure {
  margin-bottom: 32px;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  border-left: 1px solid var(--grid-line);
}

.page-about .timeline-item {
  position: relative;
  padding: 0 0 34px 22px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-pitch);
  border: 2px solid var(--c-neon-deep);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .timeline-item.is-current::before {
  background: var(--c-orange);
  border-color: var(--c-orange);
  box-shadow: 0 0 0 5px rgba(255, 122, 26, 0.18);
}

.page-about .timeline-item:hover::before {
  background: var(--c-neon);
  border-color: var(--c-neon);
}

.page-about .about-timeline .timeline-time {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-4);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--c-timer);
}

.page-about .timeline-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-3);
  color: var(--c-white);
}

.page-about .timeline-text {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.8;
  color: #b6cfca;
  max-width: 36em;
}

/* ---------- SCALE ---------- */

.page-about .scale-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--glass-line);
}

.page-about .scale-item {
  position: relative;
  padding: 24px 20px;
  background: linear-gradient(160deg, rgba(16, 64, 58, 0.55), rgba(4, 33, 29, 0.9));
  overflow: hidden;
}

.page-about .scale-item::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 240, 208, 0.16), transparent 68%);
  pointer-events: none;
}

.page-about .scale-num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-5);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-neon);
}

.page-about .scale-plus {
  font-size: 0.55em;
  color: var(--c-neon-deep);
}

.page-about .scale-name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-2);
  letter-spacing: 0.02em;
  color: var(--c-white);
}

.page-about .scale-desc {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.75;
  color: var(--c-index);
}

/* ---------- RHYTHM ---------- */

.page-about .rhythm-strip {
  display: grid;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--glass-line);
}

.page-about .rhythm-slot {
  position: relative;
  padding: 24px 20px 26px;
  background: var(--c-locker);
}

.page-about .rhythm-slot.is-key {
  background: linear-gradient(180deg, rgba(255, 122, 26, 0.14), rgba(10, 47, 40, 0.95));
  border-top: 2px solid var(--c-orange);
}

.page-about .rhythm-time {
  margin: 0 0 12px;
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.1em;
  color: var(--c-white);
  background: rgba(43, 90, 82, 0.55);
  border: 1px solid var(--glass-line);
}

.page-about .rhythm-slot.is-key .rhythm-time {
  background: var(--c-orange);
  color: var(--c-pitch);
  border-color: var(--c-orange);
  font-weight: 700;
}

.page-about .rhythm-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-3);
  color: var(--c-white);
}

.page-about .rhythm-text {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.8;
  color: #b6cfca;
}

/* ---------- REGION ---------- */

.page-about .region-split {
  display: grid;
  gap: 28px;
}

.page-about .region-stats {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--glass-line);
  border: 1px solid var(--glass-line);
}

.page-about .region-stats li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--c-locker);
  font-family: var(--font-body);
  font-size: var(--step-1);
  color: var(--c-index);
}

.page-about .rs-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-3);
  font-weight: 600;
  color: var(--c-neon);
  min-width: 4.5em;
}

/* ---------- PARTNERS ---------- */

.page-about .partner-grid {
  margin-top: 24px;
}

.page-about .partner-card {
  background: var(--c-locker);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  padding: 22px 20px;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .partner-card:hover {
  border-color: rgba(59, 240, 208, 0.5);
  background: var(--c-glass);
}

.page-about .partner-card .card-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.1em;
  border-radius: var(--radius);
}

.page-about .partner-card .card-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-3);
  color: var(--c-white);
}

.page-about .partner-card .card-body {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.78;
  color: #b6cfca;
}

.page-about .partner-card .card-meta {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--hairline);
  font-size: var(--step-0);
  letter-spacing: 0.05em;
  color: var(--c-index);
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .filter-btn {
  appearance: none;
  cursor: pointer;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.08em;
  color: var(--c-index);
  background: transparent;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .filter-btn:hover {
  color: var(--c-neon);
  border-color: var(--c-neon);
}

.page-about .filter-btn[aria-pressed="true"] {
  color: var(--c-pitch);
  background: var(--c-neon);
  border-color: var(--c-neon);
  font-weight: 700;
}

.page-about .filter-btn:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 2px;
}

.page-about .partner-card.is-filtered-out {
  display: none;
}

/* ---------- JOIN ---------- */

.page-about .join-paths {
  display: grid;
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--glass-line);
}

.page-about .join-path {
  display: block;
  padding: 24px 20px 26px;
  background: var(--c-locker);
  text-decoration: none;
  transition: background 0.22s var(--ease);
}

.page-about .join-path:hover {
  background: var(--c-glass);
}

.page-about .join-idx {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.2em;
  color: var(--c-neon);
}

.page-about .join-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-3);
  color: var(--c-white);
}

.page-about .join-text {
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.78;
  color: #b6cfca;
}

.page-about .join-go {
  font-family: var(--font-mono);
  font-size: var(--step-0);
  letter-spacing: 0.1em;
  color: var(--c-orange);
  border-bottom: 1px solid rgba(255, 122, 26, 0.45);
}

.page-about .join-note {
  margin: 26px 0 0;
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.8;
  color: var(--c-index);
}

.page-about .join-note a {
  color: var(--c-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 208, 0.4);
}

.page-about .join-note a:hover {
  color: var(--c-white);
  border-bottom-color: var(--c-white);
}

/* ---------- FOCUS ---------- */

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 2px;
}

/* ---------- RESPONSIVE ---------- */

@media (min-width: 640px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

  .page-about .grid-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 120px var(--gutter) 72px;
  }

  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap);
    padding: 0 var(--gutter);
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
    padding: 64px 0 0;
    border-bottom: 0;
    border-right: 1px solid var(--hairline);
  }

  .page-about .rail-index {
    flex-direction: column;
    gap: 12px;
    padding-right: 16px;
  }

  .page-about .about-section {
    padding: 76px 0 28px;
  }

  .page-about .region-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 36px;
  }

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

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

  .page-about .about-card,
  .page-about .partner-card {
    min-height: 100%;
  }
}

@media (min-width: 1200px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
  }

  .page-about .grid-cards {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-detail,
  .page-about .team-card::before,
  .page-about .join-path,
  .page-about .partner-card {
    transition: none;
  }

  .page-about .team-detail {
    max-height: 14em;
    opacity: 1;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>

.page-about {
  --ratio: inherit;
}