.page-about {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  padding-block: clamp(1rem, 2.6vw, 2rem) calc(var(--space) * 0.9);
}

.page-about .about-text {
  margin: 0 0 0.9rem;
  font-size: 1rem;
  line-height: 1.8;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-hero {
  margin-top: clamp(1.25rem, 3vw, 2.5rem);
}

.page-about .about-hero .eyebrow {
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about h1 {
  margin: 0 0 1.25rem;
  max-width: 20em;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1.06;
  letter-spacing: 0.04em;
  color: var(--paper);
  text-shadow: 4px 4px 0 var(--ink-deep);
}

.page-about .about-hero__grid {
  display: grid;
  gap: calc(var(--gap) * 1.1);
  align-items: start;
}

.page-about .about-hero__copy {
  max-width: 40em;
}

.page-about .about-jump {
  display: inline-block;
  margin-top: 0.4rem;
  padding-bottom: 0.15rem;
  border-bottom: 2px dashed var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.05em;
  color: var(--cyan);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-jump:hover,
.page-about .about-jump:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

.page-about .about-jump--small {
  margin-top: auto;
  font-size: 0.8rem;
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
  border: var(--bw) solid var(--cyan);
  background: var(--ink-panel);
  box-shadow: var(--hard);
}

.page-about .about-metrics__item {
  padding: 0.85rem 0.9rem;
  border-bottom: 1px dashed var(--paper-20);
  border-right: 1px dashed var(--paper-20);
}

.page-about .about-metrics__item:nth-child(2n) {
  border-right: 0;
}

.page-about .about-metrics__item:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.page-about .about-metrics__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-metrics__item--gold .about-metrics__num {
  color: var(--gold);
}

.page-about .about-metrics__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--mist);
}

.page-about .about-split {
  display: grid;
  gap: calc(var(--gap) * 1.5);
  margin-top: var(--space);
}

.page-about .about-block + .about-block {
  margin-top: calc(var(--gap) * 1.4);
  padding-top: calc(var(--gap) * 1.1);
  border-top: var(--bw) solid var(--paper-20);
}

.page-about .about-h2 {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 2.8vw, 1.8rem);
  line-height: 1.28;
  letter-spacing: 0.06em;
  color: var(--paper);
}

.page-about .about-h2::before {
  content: "";
  display: inline-block;
  width: 0.5em;
  height: 0.5em;
  margin-right: 0.45em;
  background: var(--gold);
  vertical-align: 0.06em;
}

.page-about .about-figure {
  margin: 1.25rem 0;
  border: var(--bw) solid var(--ink-panel);
  box-shadow: var(--hard-sm);
  background: var(--ink-panel);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure--wide {
  border-color: var(--cyan-35);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stats--tight {
  margin-top: 1rem;
}

.page-about .about-stats__item {
  padding: 0.7rem 0.75rem;
  border: var(--bw) solid var(--paper-20);
  background: var(--ink-panel);
  box-shadow: var(--hard-sm);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tags .tag {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

.page-about .about-track {
  padding-top: calc(var(--gap) * 0.2);
}

.page-about .about-track__head {
  display: grid;
  gap: 0.4rem;
}

.page-about .about-track__note {
  margin: 0;
  max-width: 34em;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-track__figure {
  margin: 1.25rem 0 0;
  border: var(--bw) solid var(--paper-20);
  box-shadow: var(--hard-sm);
  background: var(--ink-panel);
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.page-about .about-track__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .rank-axis {
  position: relative;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .rank-axis::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--violet), var(--gold) 55%, var(--cyan));
}

.page-about .rank-node {
  position: relative;
  padding-left: 2rem;
  padding-bottom: 0.7rem;
}

.page-about .rank-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 16px;
  height: 16px;
  border: 2px solid var(--gold);
  background: var(--ink);
  transform: rotate(45deg);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .rank-node__box {
  border: var(--bw) solid var(--paper-20);
  background: var(--ink-panel);
  box-shadow: var(--hard-sm);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .rank-node__box:hover,
.page-about .rank-node__box[open] {
  border-color: var(--cyan);
}

.page-about .rank-node__box:hover {
  transform: translate(-2px, -2px);
}

.page-about .rank-node__box summary {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.72rem 0.9rem;
  cursor: pointer;
  list-style: none;
}

.page-about .rank-node__box summary::-webkit-details-marker {
  display: none;
}

.page-about .rank-node__box summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .rank-node__box summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--cyan);
}

.page-about .rank-node__box[open] summary::after {
  content: "–";
  color: var(--gold);
}

.page-about .rank-node__code {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .rank-node__name {
  font-family: var(--font-display);
  font-size: 0.98rem;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.page-about .rank-node__body {
  padding: 0.7rem 0.9rem 0.95rem;
  border-top: 1px dashed var(--paper-20);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .rank-node__body p {
  margin: 0;
}

.page-about .node-chip {
  display: inline-block;
  padding: 0.08rem 0.36rem;
  border: 1px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .about-benefits {
  margin-top: var(--space);
  padding-top: calc(var(--gap) * 1.1);
  border-top: var(--bw) solid var(--paper-20);
}

.page-about .about-benefits .section-head {
  margin-bottom: 1.25rem;
}

.page-about .about-benefits .section-head__note {
  margin: 0;
  max-width: 40em;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .benefit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
}

.page-about .benefit-card {
  display: flex;
  flex-direction: column;
  border: var(--bw) solid var(--ink-deep);
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--hard-sm);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .benefit-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--hard);
}

.page-about .benefit-card summary {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  flex-wrap: wrap;
  padding: 0.75rem 0.85rem;
  cursor: pointer;
  list-style: none;
}

.page-about .benefit-card summary::-webkit-details-marker {
  display: none;
}

.page-about .benefit-card summary:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: -4px;
}

.page-about .benefit-card summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--ink-panel);
}

.page-about .benefit-card[open] summary::after {
  content: "–";
}

.page-about .benefit-card__code {
  padding: 0.1rem 0.35rem;
  border: 1px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.page-about .benefit-card__title {
  font-family: var(--font-display);
  font-size: 0.94rem;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.page-about .benefit-card__rank {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-panel);
}

.page-about .benefit-card__body {
  padding: 0 0.85rem 0.85rem;
  border-top: 1px dashed rgba(11, 27, 43, 0.35);
  padding-top: 0.65rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--ink-panel);
}

.page-about .benefit-card__body p {
  margin: 0;
}

.page-about .benefit-card--summary {
  justify-content: flex-start;
  gap: 0.6rem;
  padding: 0.85rem;
  background: var(--ink-panel);
  border-color: var(--gold);
  color: var(--paper);
  box-shadow: var(--hard-sm);
}

.page-about .benefit-card--summary:hover {
  transform: none;
  box-shadow: var(--hard-sm);
}

.page-about .benefit-card--summary .benefit-card__code {
  align-self: flex-start;
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .benefit-card__summary-text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-next {
  margin-top: var(--space);
  padding-top: calc(var(--gap) * 1.1);
  border-top: var(--bw) solid var(--paper-20);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin-top: 1.1rem;
}

.page-about .about-link-card {
  display: block;
  padding: 0.95rem 1rem;
  border: var(--bw) solid var(--paper-20);
  background: var(--ink-panel);
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-link-card:hover,
.page-about .about-link-card:focus-visible {
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: var(--hard-sm);
}

.page-about .about-link-card__label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.98rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-link-card__desc {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-next__foot {
  margin: 1.1rem 0 0;
  font-size: 0.82rem;
  color: var(--mist);
}

.page-about .about-next__foot a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-next__foot a:hover {
  color: var(--gold);
}

@media (min-width: 640px) {
  .page-about .benefit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: calc(var(--gap) * 1.6);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: calc(var(--gap) * 1.8);
  }

  .page-about .about-track__figure {
    aspect-ratio: 4 / 3;
  }

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

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

@media (min-width: 1200px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

  .page-about .rank-node__box:hover,
  .page-about .benefit-card:hover,
  .page-about .about-link-card:hover {
    transform: none;
  }
}