.page-about {
  --about-bg: #0C1017;
  --about-glow: rgba(232, 64, 47, 0.22);
  --about-line-soft: rgba(43, 52, 66, 0.7);
  display: block;
  padding-bottom: clamp(40px, 7vw, 88px);
  color: var(--white);
  font-family: var(--sans);
  overflow-x: clip;
}

.page-about .about-hero {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  padding-block: clamp(20px, 4vw, 40px) clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-size: clamp(32px, 6vw, 66px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-hero-stats {
  list-style: none;
  margin: clamp(22px, 3.5vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  background: var(--about-bg);
  padding: 14px 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat-num {
  font-family: var(--mono);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .about-stat-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--silver);
}

.page-about .about-hero-visual {
  position: relative;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 72% 22%, var(--about-glow), transparent 62%),
    linear-gradient(160deg, #101725, var(--ink));
  aspect-ratio: 1 / 1;
  max-height: 400px;
  overflow: hidden;
}

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

.page-about .about-rail {
  margin-top: clamp(14px, 2vw, 22px);
}

.page-about .about-rail ul {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  text-decoration: none;
  font-size: 13px;
  color: var(--silver);
  border: 1px solid var(--line);
  background: var(--about-bg);
  padding: 8px 12px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-rail a:hover,
.page-about .about-rail a:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
}

.page-about .about-rail .mono {
  color: var(--red);
  font-size: 12px;
}

.page-about .about-sec {
  padding-block: clamp(34px, 5.5vw, 62px);
  border-bottom: 1px solid var(--line);
}

.page-about h2 {
  margin: 8px 0 0;
  font-size: clamp(23px, 3.2vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  font-weight: 800;
}

.page-about .about-body p:not(.eyebrow) {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--silver);
  max-width: 62ch;
}

.page-about .about-open {
  display: grid;
  gap: clamp(22px, 3.5vw, 40px);
}

.page-about .about-fig {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 1px solid var(--line);
  background: var(--about-bg);
}

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

.page-about .about-fig--wide img {
  aspect-ratio: 14 / 9;
}

.page-about .about-fig figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--silver);
}

.page-about .tl {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--red) 0%, var(--red-deep) 30%, var(--cyan) 72%, var(--line) 100%);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(20px, 3vw, 28px) 34px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--red);
  border-color: var(--red);
}

.page-about .tl-year {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .tl-title {
  margin: 6px 0 0;
  font-size: clamp(17px, 2.1vw, 20px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-about .tl-text {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
  max-width: 58ch;
}

.page-about .role-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .role-card {
  background: var(--about-bg);
  padding: 18px 16px 20px;
  transition: background 0.2s var(--ease);
}

.page-about .role-card:hover {
  background: var(--panel);
}

.page-about .role-card[hidden],
.page-about .role-card.is-hidden {
  display: none;
}

.page-about .role-idx {
  display: inline-block;
  font-size: 12px;
  color: var(--red);
  border: 1px solid var(--line);
  padding: 2px 6px;
}

.page-about .role-name {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .role-text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--silver);
}

.page-about .table-scroll {
  margin-top: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  overflow-x: auto;
}

.page-about .data-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .data-table caption {
  caption-side: top;
  text-align: left;
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--silver);
  border-bottom: 1px solid var(--line);
}

.page-about .data-table th {
  text-align: left;
  padding: 12px 14px;
  background: var(--panel-deep);
  color: var(--silver);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  white-space: nowrap;
  border-bottom: 1px solid var(--line);
}

.page-about .data-table tbody th {
  background: transparent;
  color: var(--white);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

.page-about .data-table td {
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  color: var(--silver);
  line-height: 1.6;
  vertical-align: top;
}

.page-about .data-table .num {
  font-family: var(--mono);
  color: var(--lime);
  font-weight: 700;
}

.page-about .tag-cloud {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .network {
  display: grid;
  gap: 16px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .network-map {
  position: relative;
  min-height: 190px;
  border: 1px solid var(--line);
  overflow: hidden;
  background:
    radial-gradient(circle at 72% 28%, rgba(52, 216, 232, 0.18), transparent 58%),
    radial-gradient(circle at 18% 78%, rgba(232, 64, 47, 0.22), transparent 56%),
    repeating-linear-gradient(0deg, var(--about-line-soft) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(90deg, var(--about-line-soft) 0 1px, transparent 1px 26px),
    var(--about-bg);
}

.page-about .pin {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(184, 255, 74, 0.16);
}

.page-about .pin--a { top: 26%; left: 22%; }
.page-about .pin--b { top: 58%; left: 38%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(52, 216, 232, 0.16); }
.page-about .pin--c { top: 40%; left: 66%; }
.page-about .pin--d { top: 74%; left: 78%; background: var(--red); box-shadow: 0 0 0 4px rgba(232, 64, 47, 0.18); }
.page-about .pin--e { top: 18%; left: 82%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(52, 216, 232, 0.16); }

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

.page-about .network-cells li {
  background: var(--about-bg);
  padding: 14px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .net-num {
  font-family: var(--mono);
  font-size: 24px;
  line-height: 1;
  color: var(--white);
  min-width: 3ch;
}

.page-about .net-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .rhythm-grid {
  display: grid;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .rhythm-card {
  border: 1px solid var(--line);
  border-left: 2px solid var(--red);
  background: var(--about-bg);
  padding: 16px 16px 18px;
}

.page-about .rhythm-idx {
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

.page-about .rhythm-title {
  margin: 8px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .rhythm-text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--silver);
}

.page-about .about-cta {
  margin-top: clamp(28px, 4.5vw, 44px);
  padding: clamp(22px, 4vw, 40px);
  border: 1px solid rgba(232, 64, 47, 0.45);
  background: linear-gradient(120deg, rgba(232, 64, 47, 0.18), rgba(52, 216, 232, 0.1) 70%, transparent);
  display: grid;
  gap: 20px;
}

.page-about .cta-title {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--white);
}

.page-about .cta-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--silver);
  max-width: 54ch;
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

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

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

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

  .page-about .network-cells li {
    flex-direction: column;
    gap: 6px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: 1.35fr 1fr;
    align-items: center;
  }

  .page-about .about-open {
    grid-template-columns: 1.15fr 1fr;
    align-items: start;
  }

  .page-about .about-open .about-fig {
    margin-top: 0;
  }

  .page-about .network {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: stretch;
  }

  .page-about .network-cells {
    grid-template-columns: 1fr;
  }

  .page-about .about-cta {
    grid-template-columns: 1.4fr 1fr;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .role-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .tl-item {
    padding-left: 40px;
  }

  .page-about .about-fig--wide {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .tl-item::before,
  .page-about .role-card,
  .page-about .about-rail a {
    transition: none;
  }
}
<<<END>>>