.page-about {
  --about-gap: 16px;
  --about-ink-line: rgba(20, 69, 58, .9);
}

.page-about .about-hero {
  padding-block: 24px 8px;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 28px;
  margin-top: 20px;
}

.page-about .about-hero__text h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 8vw, 58px);
  line-height: 1.08;
  letter-spacing: .03em;
  color: var(--c-paper);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-mist);
}

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

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--about-ink-line);
}

.page-about .about-hero__facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-mist);
  opacity: .82;
}

.page-about .about-hero__facts dd {
  margin: 6px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-cyan-soft);
  letter-spacing: .01em;
}

.page-about .about-hero__visual {
  position: relative;
  overflow: hidden;
  padding: 18px;
  border-radius: var(--r-xl);
  border: 1px solid var(--c-ink-3);
  background:
    radial-gradient(120% 90% at 72% 0%, rgba(59, 232, 196, .16), transparent 62%),
    radial-gradient(90% 70% at 10% 100%, rgba(138, 92, 255, .14), transparent 60%),
    var(--c-ink-2);
  box-shadow: var(--shadow-panel);
}

.page-about .about-hero__visual svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .duty-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .duty {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 6px 14px;
  padding: 22px 0;
  border-top: 1px solid var(--about-ink-line);
}

.page-about .duty:last-child {
  border-bottom: 1px solid var(--about-ink-line);
}

.page-about .duty .badge {
  grid-row: span 2;
  align-self: start;
  margin-top: 2px;
}

.page-about .duty h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-paper);
}

.page-about .duty p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-about .crew-photo {
  margin: 0 0 24px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--c-ink-3);
  box-shadow: var(--shadow-soft);
}

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

.page-about .crew-grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .crew {
  padding: 18px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-ink-3);
  background: var(--c-ink-2);
  box-shadow: var(--shadow-soft);
  transition: border-color .24s var(--ease);
}

.page-about .crew:hover {
  border-color: rgba(59, 232, 196, .45);
}

.page-about .crew summary {
  display: grid;
  gap: 6px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .crew__name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-paper);
}

.page-about .crew__count {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-cyan);
}

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

.page-about .crew__toggle {
  margin-top: 6px;
  align-self: start;
  justify-self: start;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-ink-3);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-cyan-soft);
}

.page-about .crew[open] .crew__toggle {
  background: rgba(59, 232, 196, .12);
  border-color: var(--c-cyan);
}

.page-about .crew__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  border-top: 1px dashed var(--c-ink-3);
  padding-top: 14px;
}

.page-about .crew__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-about .crew__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-cyan);
}

.page-about .timeline {
  position: relative;
  padding: 8px 0 4px;
}

.page-about .timeline__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: var(--r-xl);
  opacity: .3;
  pointer-events: none;
}

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

.page-about .tl-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 32px;
}

.page-about .tl-node {
  position: relative;
  padding-top: 26px;
  border-top: 1px solid rgba(59, 232, 196, .28);
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(59, 232, 196, .16);
}

.page-about .tl-node__ver {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-gold);
}

.page-about .tl-node h3 {
  margin: 10px 0 0;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-paper);
}

.page-about .tl-node > p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-about .tl-more {
  margin-top: 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--c-ink-3);
  background: rgba(11, 43, 34, .78);
  padding: 10px 14px;
}

.page-about .tl-more summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-cyan);
}

.page-about .tl-more summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-more summary::before {
  content: "+ ";
}

.page-about .tl-more[open] summary::before {
  content: "− ";
}

.page-about .tl-more p {
  margin: 10px 0 2px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-about .process-band {
  border-radius: var(--r-xl);
  background: var(--c-paper);
  color: var(--c-ink);
  padding: 36px 22px;
}

.page-about .process-band .eyebrow {
  color: #0B6B57;
}

.page-about .process-band h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--c-ink);
}

.page-about .process-lead {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: #14453A;
}

.page-about .process-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .process-step {
  padding-top: 12px;
  border-top: 3px solid rgba(6, 25, 21, .14);
  transition: border-color .24s var(--ease), transform .24s var(--ease);
  outline: none;
}

.page-about .process-step:hover,
.page-about .process-step:focus {
  border-top-color: #0B6B57;
}

.page-about .process-step:focus-visible {
  outline: 2px solid #0B6B57;
  outline-offset: 4px;
}

.page-about .process-step__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: #0B6B57;
}

.page-about .process-step h3 {
  margin: 8px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-about .process-step p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #14453A;
}

.page-about .about-kunming__inner {
  display: grid;
  gap: 24px;
}

.page-about .about-kunming__text h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1.24;
  letter-spacing: .02em;
  color: var(--c-paper);
}

.page-about .about-kunming__text p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-about .about-kunming__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-about .kn-photo {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--c-ink-3);
  background: var(--c-ink-2);
}

.page-about .kn-photo img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .num-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .num {
  display: grid;
  gap: 6px;
  padding: 18px 16px;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-ink-3);
  background:
    linear-gradient(160deg, rgba(59, 232, 196, .08), transparent 60%),
    var(--c-ink-2);
}

.page-about .num:nth-child(even) {
  background:
    linear-gradient(160deg, rgba(242, 192, 99, .1), transparent 60%),
    var(--c-ink-2);
}

.page-about .num__val {
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--c-cyan);
}

.page-about .num:nth-child(even) .num__val {
  color: var(--c-gold);
}

.page-about .num__label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-mist);
}

.page-about .about-crosscheck__inner {
  display: grid;
  gap: 24px;
  padding: 28px 22px;
  border-radius: var(--r-xl);
  border: 1px solid var(--c-ink-3);
  background: var(--c-ink-2);
}

.page-about .crosscheck-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 4.6vw, 32px);
  line-height: 1.26;
  letter-spacing: .02em;
  color: var(--c-paper);
}

.page-about .crosscheck-head p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-about .crosscheck-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .crosscheck-list li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--about-ink-line);
}

.page-about .crosscheck-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-violet);
}

.page-about .crosscheck-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-about .about-next__inner {
  max-width: 880px;
}

.page-about .about-next__inner h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5vw, 36px);
  line-height: 1.22;
  letter-spacing: .02em;
  color: var(--c-paper);
}

.page-about .about-next__lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-about .next-links {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-about .next-link {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-ink-3);
  background: var(--c-ink-2);
  text-decoration: none;
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.page-about .next-link:hover {
  border-color: var(--c-cyan);
  transform: translateY(-2px);
}

.page-about .next-link__title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-paper);
}

.page-about .next-link__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-mist);
}

.page-about .about-next__note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-mist);
}

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

@media (min-width: 768px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .about-hero__visual {
    padding: 22px;
  }

  .page-about .duty {
    grid-template-columns: 44px 220px 1fr;
    align-items: start;
    gap: 4px 20px;
    padding: 24px 0;
  }

  .page-about .duty .badge {
    grid-row: auto;
    margin-top: 4px;
  }

  .page-about .duty p {
    margin: 2px 0 0;
  }

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

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

  .page-about .tl-node {
    padding: 28px 22px 0 0;
  }

  .page-about .tl-node::before {
    left: 0;
  }

  .page-about .process-band {
    padding: 44px 40px;
  }

  .page-about .process-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-kunming__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .num-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .num {
    padding: 22px 20px;
  }

  .page-about .about-crosscheck__inner {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    gap: 36px;
    padding: 36px 32px;
    align-items: start;
  }

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

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-block: 32px 12px;
  }

  .page-about .about-hero__inner {
    gap: 56px;
    margin-top: 28px;
  }

  .page-about .about-hero__facts dd {
    font-size: 19px;
  }

  .page-about .crew-grid {
    grid-template-columns: repeat(10, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .crew--a { grid-column: span 4; }
  .page-about .crew--b { grid-column: span 3; }
  .page-about .crew--c { grid-column: span 3; }
  .page-about .crew--d { grid-column: span 6; }
  .page-about .crew--e { grid-column: span 4; }

  .page-about .process-band {
    padding: 52px 56px;
  }

  .page-about .process-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .num-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crew,
  .page-about .next-link,
  .page-about .process-step {
    transition: opacity .12s linear;
  }

  .page-about .next-link:hover {
    transform: none;
  }
}