.page-about {
  --about-cut: 16px;
  --about-gap: clamp(48px, 7vw, 84px);
  color: var(--c-text);
  overflow-x: clip;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 56px;
  background:
    radial-gradient(115% 85% at 6% -12%, rgba(34, 230, 255, 0.16), transparent 62%),
    radial-gradient(90% 70% at 102% 8%, rgba(180, 108, 255, 0.13), transparent 66%),
    linear-gradient(158deg, var(--c-space) 0%, var(--c-tactic) 58%, var(--c-space) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -28%;
  z-index: -1;
  width: 64%;
  height: 72%;
  background: linear-gradient(135deg, rgba(255, 154, 46, 0.16), transparent 64%);
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .about-crumb {
  margin-bottom: 22px;
}

.page-about .about-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.page-about .about-crumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-line);
}

.page-about .about-crumb a {
  color: var(--c-muted);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--c-cyan);
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--c-cyan);
}

.page-about .about-kicker {
  margin: 0;
  color: var(--c-violet);
}

.page-about .about-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-about .about-title em {
  font-style: normal;
  color: var(--c-cyan);
}

.page-about .about-lead {
  margin: 18px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-about .about-readout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  border: 1px solid var(--c-line);
  background: var(--c-line);
}

.page-about .about-readout-cell {
  padding: 15px 16px 17px;
  background: var(--c-tactic);
}

.page-about .about-readout-val {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.01em;
  color: var(--c-gold);
}

.page-about .about-readout-key {
  display: block;
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.page-about .about-hero-visual {
  position: relative;
  padding: 0 10px 10px 0;
}

.page-about .about-hero-visual::before {
  content: "";
  position: absolute;
  top: 20px;
  right: 0;
  bottom: 28px;
  left: 20px;
  border: 1px solid var(--c-line);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}

.page-about .about-hero-visual img {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-about .about-hero-tag {
  position: absolute;
  left: 0;
  bottom: 22px;
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
}

/* ---------- Body layout ---------- */
.page-about .about-body {
  display: grid;
  gap: 32px;
  padding: 40px 0 72px;
}

.page-about .about-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-index-title {
  display: none;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--c-muted);
}

.page-about .chapter-link {
  display: flex;
  flex: 0 0 auto;
  align-items: baseline;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--c-line);
  background: var(--c-tactic);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .chapter-link .chapter-num {
  color: var(--c-violet);
  font-size: 11px;
}

.page-about .chapter-link:hover,
.page-about .chapter-link:focus-visible {
  color: var(--c-text);
  border-color: var(--c-cyan);
}

.page-about .chapter-link[aria-current="true"] {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
  background: rgba(34, 230, 255, 0.09);
}

.page-about .chapter-link[aria-current="true"] .chapter-num {
  color: var(--c-cyan);
}

/* ---------- Sections ---------- */
.page-about .about-section {
  position: relative;
  padding-top: 30px;
  border-top: 1px solid var(--c-line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-section + .about-section {
  margin-top: var(--about-gap);
}

.page-about .about-section-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .about-num {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 42px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: rgba(34, 230, 255, 0.32);
}

.page-about .about-section-kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-violet);
}

.page-about .about-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 4.6vw, 31px);
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.page-about .about-section p {
  margin: 0 0 14px;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-about .about-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-left: 3px solid var(--c-gold);
  background: var(--c-tactic);
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-text);
}

/* ---------- Points ---------- */
.page-about .about-points {
  display: grid;
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--c-line);
  background: var(--c-line);
}

.page-about .about-point {
  padding: 17px 18px 19px;
  background: var(--c-tactic);
}

.page-about .about-point h3 {
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-point h3 span {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

.page-about .about-point p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
}

/* ---------- Content system cards ---------- */
.page-about .about-tabs {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-card {
  padding: 17px 19px 19px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-cyan);
  background: linear-gradient(150deg, var(--c-panel), var(--c-tactic));
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-card:hover {
  transform: translateX(3px);
}

.page-about .about-card--gold {
  border-left-color: var(--c-gold);
}

.page-about .about-card--violet {
  border-left-color: var(--c-violet);
}

.page-about .about-card--green {
  border-left-color: var(--c-green);
}

.page-about .about-card-kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

.page-about .about-card h3 {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-muted);
}

/* ---------- Figure ---------- */
.page-about .about-figure {
  margin: 24px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-about .about-figure figcaption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--c-cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}

/* ---------- Team ---------- */
.page-about .about-crew {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crew-item {
  position: relative;
  padding: 16px 18px 18px;
  border: 1px solid var(--c-line);
  background: var(--c-tactic);
}

.page-about .about-crew-tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 10px;
  border: 1px solid rgba(180, 108, 255, 0.5);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-violet);
}

.page-about .about-crew-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
}

/* ---------- Timeline ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 16px;
  left: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-cyan), rgba(34, 230, 255, 0.06));
}

.page-about .about-node {
  position: relative;
  padding: 0 0 24px 34px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 3px;
  width: 11px;
  height: 11px;
  background: var(--c-space);
  border: 2px solid var(--c-violet);
  transform: rotate(45deg);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-node:hover::before,
.page-about .about-node:focus-within::before {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
}

.page-about .about-node-code {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
}

.page-about .about-node h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-node p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
}

/* ---------- Partners ---------- */
.page-about .about-partners {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partner {
  padding: 18px;
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-gold);
  background: var(--c-tactic);
}

.page-about .about-partner-count {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 40px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-gold);
}

.page-about .about-partner-unit {
  display: block;
  margin: 6px 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-text);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
}

/* ---------- Scenes / CTA ---------- */
.page-about .about-scenes {
  display: grid;
  gap: 1px;
  margin: 20px 0 22px;
  padding: 0;
  list-style: none;
  border: 1px solid var(--c-line);
  background: var(--c-line);
}

.page-about .about-scenes li {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--c-tactic);
}

.page-about .about-scenes strong {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-cyan);
}

.page-about .about-scenes span {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- Responsive ---------- */
@media (min-width: 720px) {
  .page-about .about-readout {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

  .page-about .about-lead {
    font-size: 17px;
  }

  .page-about .about-section p {
    font-size: 16px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 62px) 0 76px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-hero-visual {
    margin-top: -14px;
  }

  .page-about .about-body {
    grid-template-columns: 196px minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4.5vw, 68px);
    padding: 68px 0 104px;
  }

  .page-about .about-index {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index-title {
    display: block;
  }

  .page-about .chapter-link {
    display: block;
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 2px solid var(--c-line);
    background: transparent;
    font-size: 13px;
  }

  .page-about .chapter-link + .chapter-link {
    margin-top: 2px;
  }

  .page-about .chapter-link[aria-current="true"] {
    background: transparent;
  }

  .page-about .chapter-link .chapter-num {
    display: block;
    margin-bottom: 2px;
  }

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

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

  .page-about .about-timeline::before {
    left: 10px;
  }

  .page-about .about-node {
    padding-left: 38px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-tabs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-crew {
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .chapter-link,
  .page-about .about-node::before {
    transition: none;
  }

  .page-about .about-card:hover {
    transform: none;
  }
}