.page-about {
  --about-pad: clamp(1.1rem, 3.6vw, 2.1rem);
  --about-measure: 58ch;
  color: var(--ak-paper);
  background:
    radial-gradient(80% 50% at 100% 0%, rgba(26, 34, 68, 0.6), rgba(4, 18, 15, 0) 62%),
    var(--ak-ink-950);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.75rem, 5vw, 3.5rem) 0 clamp(1.5rem, 4vw, 2.75rem);
  background:
    radial-gradient(120% 90% at 88% -20%, rgba(54, 241, 205, 0.12), rgba(4, 18, 15, 0) 58%),
    linear-gradient(180deg, var(--ak-ink-850) 0%, var(--ak-ink-950) 82%);
  border-bottom: 1px solid var(--ak-line-soft);
}

.page-about .about-hero h1 {
  margin: 0.55rem 0 0;
  max-width: 18ch;
  font-family: var(--ak-font-sans);
  font-weight: 900;
  font-size: clamp(1.9rem, 6.4vw, 3.35rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 46ch;
  font-size: clamp(0.98rem, 2.4vw, 1.08rem);
  line-height: 1.75;
  color: var(--ak-mist);
}

.page-about .about-hero__lead strong {
  color: var(--ak-cyan);
  font-weight: 700;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 0.7rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts li {
  padding: 0.85rem 1rem;
  border: 1px solid var(--ak-line-soft);
  border-radius: var(--ak-radius-md);
  background: rgba(15, 59, 51, 0.42);
}

.page-about .about-facts b {
  display: block;
  font-family: var(--ak-font-mono);
  font-size: clamp(1.4rem, 4vw, 1.7rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ak-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-facts span {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--ak-mist);
}

.page-about .about-hero__figure {
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  border-radius: var(--ak-radius-lg);
  border: 1px solid var(--ak-line-soft);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  padding: clamp(1.75rem, 5vw, 3.5rem) 0 clamp(2rem, 6vw, 4rem);
}

/* 目录 */
.page-about .about-toc {
  padding: 1rem 1.05rem;
  border: 1px solid var(--ak-line-soft);
  border-radius: var(--ak-radius-lg);
  background: rgba(8, 36, 29, 0.72);
}

.page-about .about-toc__title {
  margin: 0 0 0.7rem;
  font-family: var(--ak-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--ak-mist);
  text-transform: uppercase;
}

.page-about .about-toc ol {
  display: grid;
  gap: 0.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-toc a {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.5rem;
  align-items: baseline;
  padding: 0.55rem 0.45rem;
  border-left: 2px solid transparent;
  border-radius: var(--ak-radius-sm);
  color: var(--ak-mist);
  font-size: 0.88rem;
  line-height: 1.4;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  color: var(--ak-paper);
  background: rgba(54, 241, 205, 0.09);
  border-left-color: var(--ak-cyan);
  outline: none;
}

.page-about .about-toc__num {
  font-family: var(--ak-font-mono);
  font-size: 0.78rem;
  color: var(--ak-cyan);
  font-variant-numeric: tabular-nums;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-bottom: clamp(1.75rem, 5vw, 3rem);
  margin-bottom: clamp(1.75rem, 5vw, 3rem);
  border-bottom: 1px dashed var(--ak-line-soft);
}

.page-about .about-chapter--last {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-about .about-band {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.75rem 1.1rem;
  align-items: start;
  padding: var(--about-pad);
  border: 1px solid var(--ak-line-soft);
  border-radius: var(--ak-radius-lg);
}

.page-about .about-band--teal {
  background:
    linear-gradient(130deg, rgba(54, 241, 205, 0.14), rgba(4, 18, 15, 0) 62%),
    linear-gradient(160deg, #0f3b33 0%, #08241d 100%);
}

.page-about .about-band--indigo {
  background:
    linear-gradient(130deg, rgba(54, 241, 205, 0.1), rgba(4, 18, 15, 0) 58%),
    linear-gradient(160deg, #1a2244 0%, #0f3b33 100%);
}

.page-about .about-band--wine {
  background:
    linear-gradient(130deg, rgba(255, 122, 26, 0.16), rgba(4, 18, 15, 0) 60%),
    linear-gradient(160deg, #451c27 0%, #1a2244 100%);
}

.page-about .about-band__num {
  font-family: var(--ak-font-mono);
  font-size: clamp(2.2rem, 8vw, 3.6rem);
  font-weight: 700;
  line-height: 0.9;
  color: var(--ak-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-band__body {
  min-width: 0;
}

.page-about .about-band__kicker {
  margin: 0;
  font-family: var(--ak-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--ak-mist);
}

.page-about .about-band h2 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.22rem, 3.8vw, 1.95rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ak-paper);
}

.page-about .about-prose {
  margin-top: 1.3rem;
  max-width: var(--about-measure);
}

.page-about .about-prose p {
  margin: 0 0 1rem;
  font-size: clamp(0.95rem, 2.2vw, 1.02rem);
  line-height: 1.85;
  color: var(--ak-paper);
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

/* 旁注 */
.page-about .about-note {
  position: relative;
  margin: 1.4rem 0 0;
  max-width: 30rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--ak-line-soft);
  border-radius: var(--ak-radius-md);
  background:
    repeating-linear-gradient(0deg, rgba(51, 84, 76, 0.22) 0 1px, rgba(4, 18, 15, 0) 1px 22px),
    rgba(15, 59, 51, 0.5);
}

.page-about .about-note strong {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--ak-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--ak-cyan);
}

.page-about .about-note p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--ak-mist);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: 0.7rem;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
  max-width: 42rem;
}

.page-about .about-node {
  border: 1px solid var(--ak-line-soft);
  border-radius: var(--ak-radius-md);
  background: rgba(8, 36, 29, 0.68);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.page-about .about-node[open] {
  border-color: rgba(54, 241, 205, 0.5);
}

.page-about .about-node__summary {
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr) 1.4rem;
  gap: 0.7rem;
  align-items: center;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
}

.page-about .about-node__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node__summary:focus-visible {
  outline: 2px solid var(--ak-cyan);
  outline-offset: -2px;
}

.page-about .about-node__year {
  font-family: var(--ak-font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ak-orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-node__label {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ak-paper);
}

.page-about .about-node__mark {
  justify-self: end;
  font-family: var(--ak-font-mono);
  font-size: 1.1rem;
  color: var(--ak-cyan);
}

.page-about .about-node__mark::after {
  content: "+";
}

.page-about .about-node[open] .about-node__mark::after {
  content: "−";
}

.page-about .about-node__body {
  padding: 0 1rem 0.95rem;
  border-top: 1px solid var(--ak-line-soft);
}

.page-about .about-node__body p {
  margin: 0.7rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--ak-mist);
}

.page-about .about-figure {
  margin: 1.5rem 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--ak-radius-lg);
  border: 1px solid var(--ak-line-soft);
}

.page-about .about-figure figcaption {
  margin-top: 0.65rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--ak-mist);
}

/* ---------- 团队 ---------- */
.page-about .about-work {
  display: grid;
  gap: 1.3rem;
  margin-top: 0.2rem;
}

.page-about .about-roles {
  display: grid;
  gap: 0.55rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-roles li {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0.15rem 0.75rem;
  padding: 0.8rem 0.95rem;
  border: 1px solid var(--ak-line-soft);
  border-radius: var(--ak-radius-md);
  background: rgba(15, 59, 51, 0.35);
}

.page-about .about-roles__n {
  grid-row: span 2;
  align-self: center;
  font-family: var(--ak-font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ak-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-roles__t {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ak-paper);
}

.page-about .about-roles__d {
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--ak-mist);
}

.page-about .about-work__figure {
  margin: 0;
}

.page-about .about-work__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: var(--ak-radius-lg);
  border: 1px solid var(--ak-line-soft);
}

/* ---------- 覆盖数据 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  margin: 1.3rem 0 1.4rem;
  max-width: 40rem;
}

.page-about .about-stats__item {
  padding: 0.85rem 0.95rem;
  border: 1px solid var(--ak-line-soft);
  border-radius: var(--ak-radius-md);
  background: rgba(26, 34, 68, 0.55);
}

.page-about .about-stats dt {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--ak-mist);
}

.page-about .about-stats dd {
  margin: 0.3rem 0 0;
  display: flex;
  align-items: baseline;
  gap: 0.3rem;
}

.page-about .about-stats__n {
  font-family: var(--ak-font-mono);
  font-size: clamp(1.4rem, 4.4vw, 1.8rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ak-cyan);
  border-bottom: 2px solid rgba(54, 241, 205, 0.45);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stats__u {
  font-size: 0.78rem;
  color: var(--ak-mist);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: clamp(2rem, 5vw, 3.25rem) 0 clamp(2.25rem, 6vw, 3.75rem);
  border-top: 1px solid var(--ak-line-soft);
  background:
    linear-gradient(180deg, rgba(8, 36, 29, 0.85) 0%, rgba(4, 18, 15, 0.95) 100%);
}

.page-about .about-next h2 {
  margin: 0;
  font-size: clamp(1.3rem, 4vw, 1.75rem);
  line-height: 1.25;
  color: var(--ak-paper);
}

.page-about .about-next__lead {
  margin: 0.55rem 0 1.3rem;
  max-width: 42ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--ak-mist);
}

.page-about .about-next__list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__list a {
  display: block;
  padding: 0.9rem 1rem;
  border: 1px solid var(--ak-line-soft);
  border-radius: var(--ak-radius-md);
  background: rgba(15, 59, 51, 0.4);
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-about .about-next__list a:hover,
.page-about .about-next__list a:focus-visible {
  border-color: var(--ak-cyan);
  background: rgba(54, 241, 205, 0.1);
  transform: translateY(-2px);
  outline: none;
}

.page-about .about-next__t {
  display: block;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ak-paper);
}

.page-about .about-next__d {
  display: block;
  margin-top: 0.22rem;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--ak-mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 48rem) {
  .page-about .about-work {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 1.5rem 2rem;
  }

  .page-about .about-work .about-prose,
  .page-about .about-work .about-roles {
    grid-column: 1;
  }

  .page-about .about-work__figure {
    grid-column: 2;
    grid-row: 1 / span 3;
    position: sticky;
    top: 6.5rem;
  }

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

  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
  }

  .page-about .about-node__summary {
    grid-template-columns: 4rem minmax(0, 1fr) 1.4rem;
    padding: 1rem 1.2rem;
  }

  .page-about .about-node__body {
    padding: 0 1.2rem 1.1rem;
  }
}

@media (min-width: 62rem) {
  .page-about .about-body {
    grid-template-columns: 14rem minmax(0, 1fr);
    align-items: start;
    gap: clamp(1.75rem, 3vw, 3rem);
  }

  .page-about .about-toc {
    position: sticky;
    top: 6.5rem;
  }

  .page-about .about-band {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.9rem 1.6rem;
    padding: clamp(1.35rem, 2.4vw, 2rem);
  }

  .page-about .about-band__num {
    font-size: clamp(3rem, 5vw, 4.4rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-next__list a,
  .page-about .about-toc a,
  .page-about .about-node {
    transition: none;
  }

  .page-about .about-next__list a:hover,
  .page-about .about-next__list a:focus-visible {
    transform: none;
  }
}
<<<END>>>