.page-about {
  --about-rail: 118px;
  --about-hair: rgba(201, 212, 208, 0.14);
  --about-glow: radial-gradient(circle at 76% 10%, rgba(200, 255, 61, 0.1), transparent 56%);
  --about-tint: rgba(200, 255, 61, 0.07);
  background: var(--ink-900);
  color: var(--text);
}

.page-about .about-hero {
  position: relative;
  padding: 40px 0 44px;
  background-image: var(--about-glow);
  background-repeat: no-repeat;
  background-size: cover;
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-about .display-1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(34px, 7vw, 66px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .about-hero__lead .lead {
  max-width: 46em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-hero__status {
  margin-top: 22px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: rgba(11, 59, 46, 0.45);
}

.page-about .about-hero__status .status__text {
  font-size: 13px;
  color: var(--silver);
  line-height: 1.5;
}

.page-about .about-index {
  padding: 18px 18px 12px;
  border-radius: var(--radius);
}

.page-about .about-index__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-about .about-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 6px;
  border-bottom: 1px solid var(--about-hair);
  color: var(--silver);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-index__list li:last-child .about-index__link {
  border-bottom: 0;
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime);
  letter-spacing: 0.1em;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--text);
  background: var(--about-tint);
}

/* ---------- chapter skeleton ---------- */

.page-about .about-chapter {
  padding: 52px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-chapter--panel {
  background: linear-gradient(180deg, rgba(11, 59, 46, 0.5), rgba(6, 35, 29, 0));
}

.page-about .about-row {
  display: grid;
  gap: 18px;
}

.page-about .about-row__index {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--silver);
}

.page-about .about-row__index::before {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  background: var(--lime);
}

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

.page-about .about-heading {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(25px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .about-sub {
  max-width: 62em;
  margin: 0 0 26px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--silver);
  max-width: 60em;
}

.page-about .about-prose p strong {
  color: var(--text);
}

.page-about .about-note {
  margin: 24px 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--cyan);
  background: rgba(11, 59, 46, 0.42);
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- focus list ---------- */

.page-about .about-focus {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-focus li {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-focus__key {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-about .about-focus__text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- timeline ---------- */

.page-about .axis-scale {
  display: block;
  width: 100%;
  height: auto;
  margin: 4px 0 22px;
}

.page-about .axis-list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .axis-item {
  position: relative;
  margin-left: 7px;
  padding: 0 0 16px 22px;
  border-left: 1px solid var(--line);
}

.page-about .axis-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 14px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.12);
}

.page-about .axis-item:last-child {
  padding-bottom: 0;
}

.page-about .axis-item--end::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 184, 75, 0.14);
}

.page-about .axis-item details {
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .axis-item details:hover {
  transform: translateY(-2px);
  border-color: rgba(200, 255, 61, 0.4);
}

.page-about .axis-item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .axis-item summary::after {
  content: "展开";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .axis-item details[open] summary::after {
  content: "收起";
}

.page-about .axis-item summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .axis-item__year {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text);
  letter-spacing: 0.04em;
}

.page-about .axis-item__title {
  flex: 1 1 100%;
  font-size: 15px;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .axis-item__body {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
  border-top: 1px solid var(--about-hair);
  padding-top: 12px;
}

/* ---------- images ---------- */

.page-about .about-shot {
  margin: 0 0 22px;
}

.page-about .about-shot img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.page-about .about-shot--wide {
  margin-top: 22px;
}

.page-about .about-shot .media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-shot--coda {
  margin: 0;
}

.page-about .about-shot--coda img {
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

/* ---------- breath ---------- */

.page-about .about-breath {
  padding: 60px 0;
  background: var(--ink-950);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-breath__line {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 62px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.08em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(200, 255, 61, 0.55);
  text-align: right;
}

/* ---------- team ---------- */

.page-about .team-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-card {
  padding: 18px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(200, 255, 61, 0.45);
  background: rgba(18, 63, 53, 0.9);
}

.page-about .team-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 44px;
  line-height: 1;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .team-card__role {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text);
}

.page-about .team-card__duty {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--silver);
  transition: color var(--dur) var(--ease);
}

.page-about .team-card:hover .team-card__duty {
  color: var(--mist);
}

/* ---------- steps ---------- */

.page-about .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .step {
  padding: 20px 18px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-top: 2px solid var(--lime);
  border-radius: var(--radius);
}

.page-about .step:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-about .step:nth-child(3) {
  border-top-color: var(--amber);
}

.page-about .step__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--silver);
}

.page-about .step__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

.page-about .step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- network ---------- */

.page-about .stats {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .about-stat {
  padding: 16px 14px;
  background: rgba(11, 59, 46, 0.55);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-stat .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-stat .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-network {
  display: grid;
  gap: 16px;
}

.page-about .about-network__col {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-800);
}

.page-about .about-network__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-network__col p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- reach ---------- */

.page-about .contact-split {
  display: grid;
  gap: 18px;
}

.page-about .about-paths {
  display: grid;
  gap: 10px;
}

.page-about .path-card {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: start;
  gap: 4px 12px;
  padding: 14px 16px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .path-card:hover,
.page-about .path-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(200, 255, 61, 0.5);
  background: rgba(18, 63, 53, 0.95);
}

.page-about .path-card__num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lime);
  letter-spacing: 0.08em;
  padding-top: 3px;
}

.page-about .path-card__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.page-about .path-card__text {
  grid-column: 2;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-contact {
  padding: 20px 18px;
  border-radius: var(--radius);
}

.page-about .about-contact__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-about .about-contact__list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-contact__row {
  display: grid;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-contact__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-contact__row dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--silver);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-about .about-contact__row dd a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 216, 196, 0.5);
}

.page-about .about-contact__row dd a:hover,
.page-about .about-contact__row dd a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .about-contact__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- coda ---------- */

.page-about .about-coda {
  padding: 52px 0 60px;
  background: var(--ink-950);
}

.page-about .about-coda__grid {
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-about .about-coda__line {
  margin: 14px 0 22px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-about .about-coda__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- responsive ---------- */

@media (min-width: 640px) {
  .page-about .about-focus {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 64px 0 60px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 108px;
  }

  .page-about .about-chapter {
    padding: 76px 0;
  }

  .page-about .about-row {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 34px;
  }

  .page-about .about-row__index {
    position: sticky;
    top: 118px;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    writing-mode: vertical-rl;
    letter-spacing: 0.42em;
  }

  .page-about .about-row__index::before {
    width: 2px;
    height: 36px;
  }

  .page-about .about-breath {
    padding: 92px 0;
  }

  .page-about .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

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

  .page-about .contact-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 26px;
    align-items: start;
  }

  .page-about .about-coda {
    padding: 76px 0 84px;
  }

  .page-about .about-coda__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 42px;
  }
}

@media (min-width: 1080px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .team-card:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .team-card:nth-child(3) {
    margin-top: 12px;
  }

  .page-about .team-card:nth-child(4) {
    margin-top: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .path-card,
  .page-about .axis-item details {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus-within,
  .page-about .path-card:hover,
  .page-about .path-card:focus-visible,
  .page-about .axis-item details:hover {
    transform: none;
  }
}
<<<END>>>