.page-about {
  --pf-rail: clamp(14px, 3vw, 22px);
}
.page-about .pf-hero {
  padding: clamp(28px, 5vw, 56px) 0 clamp(48px, 7vw, 96px);
}
.page-about .pf-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}
.page-about .pf-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(34px, 7.4vw, 78px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--text);
}
.page-about .pf-hero__lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .pf-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  list-style: none;
  margin: 32px 0 0;
  padding: 20px 0 0;
  border-top: var(--rule);
}
.page-about .pf-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .pf-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}
.page-about .pf-hero__unit {
  font-size: 0.6em;
  margin-left: 2px;
  color: var(--gold);
}
.page-about .pf-hero__media {
  position: relative;
  margin: 0;
  border: var(--rule);
  background: var(--ink-1);
}
.page-about .pf-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.page-about .pf-hero__media figcaption {
  padding: 8px 12px;
  border-top: var(--rule);
  color: var(--muted);
}

.page-about .pf-start {
  padding: clamp(40px, 6vw, 88px) 0;
  border-top: var(--rule);
}
.page-about .pf-start__grid {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
}
.page-about .pf-start__title {
  margin: 12px 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.16;
  color: var(--text);
}
.page-about .pf-seal {
  display: inline-block;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--purple);
  border: 1px solid var(--purple);
}
.page-about .pf-seal--sm {
  margin-top: 12px;
  padding: 3px 8px;
  font-size: 11px;
  color: var(--magenta);
  border-color: var(--magenta);
}
.page-about .pf-start__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .pf-start__body p:first-child {
  color: var(--text);
}
.page-about .pf-start__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .pf-history {
  padding: clamp(40px, 6vw, 96px) 0;
  border-top: var(--rule);
}
.page-about .pf-history__head {
  margin-bottom: 24px;
}
.page-about .pf-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(28px, 4vw, 48px);
}
.page-about .pf-jump__link {
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  transition: color 0.12s ease, border-color 0.12s ease;
}
.page-about .pf-jump__link:hover,
.page-about .pf-jump__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}
.page-about .pf-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .pf-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--purple), var(--line) 70%);
}
.page-about .pf-node {
  position: relative;
  padding-left: 34px;
  padding-bottom: clamp(30px, 4.5vw, 56px);
}
.page-about .pf-node:last-child {
  padding-bottom: 0;
}
.page-about .pf-node__dot {
  position: absolute;
  left: 1px;
  top: 12px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--cyan);
  background: var(--ink-0);
  transition: background 0.12s ease, box-shadow 0.12s ease;
}
.page-about .pf-node:hover .pf-node__dot {
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(61, 242, 230, 0.55);
}
.page-about .pf-node__year .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(38px, 9vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--text);
  transition: color 0.12s ease;
}
.page-about .pf-node:hover .pf-node__year .num {
  color: var(--purple);
}
.page-about .pf-node__body {
  margin-top: 10px;
  padding-bottom: 18px;
  border-bottom: var(--rule);
}
.page-about .pf-node__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2.6vw, 21px);
  line-height: 1.4;
  color: var(--text);
}
.page-about .pf-node__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .pf-team {
  padding: clamp(40px, 6vw, 96px) 0;
  border-top: var(--rule);
}
.page-about .pf-team__head {
  margin-bottom: clamp(24px, 4vw, 40px);
}
.page-about .pf-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}
.page-about .pf-team__media {
  margin: 0;
  border: var(--rule);
}
.page-about .pf-team__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .pf-team__media figcaption {
  padding: 8px 12px;
  border-top: var(--rule);
  color: var(--muted);
}
.page-about .pf-team__ring {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  padding: clamp(16px, 3vw, 28px);
  border: var(--rule);
  background: var(--ink-1);
}
.page-about .pf-team__ring svg {
  width: min(100%, 240px);
  height: auto;
}
.page-about .pf-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  width: 100%;
  font-size: 14px;
  color: var(--muted);
}
.page-about .pf-legend li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-about .pf-legend__dot {
  width: 8px;
  height: 8px;
  flex: none;
}
.page-about .pf-legend__dot--cyan { background: var(--cyan); }
.page-about .pf-legend__dot--purple { background: var(--purple); }
.page-about .pf-legend__dot--gold { background: var(--gold); }

.page-about .pf-team__filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}
.page-about .pf-team__count {
  color: var(--muted);
  margin-left: auto;
}
.page-about .pf-role {
  padding: 18px 0;
  border-top: var(--rule);
}
.page-about .pf-role h3 {
  margin: 6px 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2.6vw, 21px);
  color: var(--text);
}
.page-about .pf-role p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .pf-process {
  padding: clamp(40px, 6vw, 96px) 0;
  border-top: var(--rule);
}
.page-about .pf-process__grid {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
}
.page-about .pf-process__title {
  margin: 12px 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1.16;
  color: var(--text);
}
.page-about .pf-process__lead p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .pf-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .pf-flow__step {
  position: relative;
  padding: 16px 0 16px 44px;
  border-top: var(--rule);
}
.page-about .pf-flow__step:last-child {
  border-bottom: var(--rule);
}
.page-about .pf-flow__no {
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
}
.page-about .pf-flow__step h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  color: var(--text);
}
.page-about .pf-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .pf-net {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 7vw, 110px) 0;
  margin-top: clamp(20px, 4vw, 48px);
  background: var(--ink-1);
  border-top: var(--rule);
  border-bottom: var(--rule);
}
.page-about .pf-net__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.28;
  pointer-events: none;
}
.page-about .pf-net::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 10, 20, 0.72), rgba(7, 10, 20, 0.94));
  pointer-events: none;
}
.page-about .pf-net__inner {
  position: relative;
  z-index: 1;
}
.page-about .pf-net__title {
  margin: 12px 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.14;
  color: var(--text);
}
.page-about .pf-net__head p {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .pf-net__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 48px;
  margin: clamp(28px, 4vw, 44px) 0;
  padding: 20px 0;
  border-top: var(--rule);
  border-bottom: var(--rule);
}
.page-about .pf-net__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .pf-net__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}
.page-about .pf-net__cols {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .pf-net__col {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 12px;
  background: var(--ink-0);
  font-size: 15px;
  color: var(--text);
  text-decoration: none;
  transition: background 0.12s ease, color 0.12s ease;
}
.page-about .pf-net__col .anno {
  color: var(--muted);
}
.page-about a.pf-net__col:hover,
.page-about a.pf-net__col:focus-visible {
  background: var(--ink-1);
  color: var(--cyan);
}
.page-about .pf-net__col--here {
  color: var(--magenta);
}
.page-about .pf-net__col--here .anno {
  color: var(--magenta);
}

.page-about .pf-access {
  padding: clamp(44px, 6vw, 100px) 0 clamp(56px, 8vw, 120px);
}
.page-about .pf-access__grid {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  margin-top: clamp(24px, 4vw, 40px);
}
.page-about .pf-access__item {
  padding: 20px;
  border: var(--rule);
  background: var(--ink-1);
}
.page-about .pf-access__item h3 {
  margin: 8px 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  color: var(--text);
}
.page-about .pf-access__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}
.page-about .pf-access__panel {
  margin-top: clamp(24px, 4vw, 40px);
}
.page-about .pf-access__panel .panel__value {
  font-family: var(--font-mono);
  word-break: break-all;
}
.page-about .pf-access__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px 0 0;
}

@media (min-width: 780px) {
  .page-about .pf-access__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .pf-net__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .pf-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
  }
  .page-about .pf-start__grid {
    grid-template-columns: 0.42fr 0.58fr;
    align-items: start;
  }
  .page-about .pf-team__grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
  .page-about .pf-team__roles {
    grid-column: 1 / -1;
  }
  .page-about .pf-process__grid {
    grid-template-columns: 0.4fr 0.6fr;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .pf-history {
    padding-bottom: clamp(70px, 8vw, 120px);
  }
  .page-about .pf-timeline::before {
    left: 50%;
  }
  .page-about .pf-node {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: clamp(32px, 5vw, 88px);
    padding-left: 0;
    padding-bottom: clamp(36px, 5vw, 64px);
  }
  .page-about .pf-node__dot {
    left: calc(50% - 5px);
    top: 28px;
  }
  .page-about .pf-node:nth-child(odd) .pf-node__year {
    grid-column: 1;
    text-align: right;
    padding-top: 10px;
  }
  .page-about .pf-node:nth-child(odd) .pf-node__body {
    grid-column: 2;
  }
  .page-about .pf-node:nth-child(even) .pf-node__year {
    grid-column: 2;
    grid-row: 1;
    text-align: left;
    padding-top: 10px;
  }
  .page-about .pf-node:nth-child(even) .pf-node__body {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
    padding-left: 20px;
  }
  .page-about .pf-node:nth-child(odd) .pf-node__body {
    padding-right: 20px;
  }
  .page-about .pf-node:nth-child(even) .pf-node__body .pf-seal--sm {
    margin-top: 12px;
  }
  .page-about .pf-team__grid {
    grid-template-columns: 1.05fr 0.62fr 0.83fr;
    align-items: start;
  }
  .page-about .pf-team__roles {
    grid-column: auto;
  }
}
<<<END>>>