.page-about {
  background: var(--ink-900);
  color: var(--text);
  overflow-x: hidden;
}

.page-about .section {
  position: relative;
  padding: clamp(30px, 5vw, 58px) 0;
}

.page-about .section + .section {
  border-top: 1px solid var(--line-hair);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: clamp(24px, 4vw, 46px);
  border-bottom: 1px solid var(--line-hair);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(62% 70% at 84% 4%, rgba(95, 242, 193, .13), transparent 70%),
    radial-gradient(48% 55% at 6% 96%, rgba(245, 184, 75, .08), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero .wrap {
  position: relative;
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(20px, 4vw, 38px);
  margin-top: clamp(16px, 3vw, 28px);
}

.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(29px, 6vw, 52px);
  line-height: 1.14;
  letter-spacing: -.022em;
  color: var(--text);
}

.page-about .about-hero .lede {
  max-width: 62ch;
  color: var(--text-body);
  line-height: 1.8;
}

.page-about .about-hero .tag-row {
  margin-top: 18px;
}

.page-about .about-panel {
  padding: clamp(18px, 3vw, 26px);
}

.page-about .about-panel-kicker {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .about-facts {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-hair);
}

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

.page-about .about-fact dt {
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

/* ---------- 起源章节 ---------- */

.page-about .about-origin .grid--split {
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-sub {
  margin: 26px 0 12px;
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--mint);
}

.page-about .about-aside {
  padding-top: 18px;
  border-top: 1px solid var(--line-hair);
}

.page-about .about-quote {
  margin: 0;
  font-size: clamp(17px, 2.4vw, 21px);
  line-height: 1.6;
  color: var(--text);
}

.page-about .about-quote-src {
  margin: 8px 0 0;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .about-mini {
  margin-top: 22px;
  padding: 14px 16px;
  border-left: 2px solid var(--mint);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--mint-wash);
}

.page-about .about-mini-kicker {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mint-soft);
}

.page-about .about-mini-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-body);
}

/* ---------- 时间线 ---------- */

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
}

.page-about .about-jump a {
  display: inline-block;
  padding: 6px 13px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--muted);
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--ink-900);
  background: var(--mint);
  border-color: var(--mint);
}

.page-about .era-list {
  position: relative;
  margin: 0 0 clamp(20px, 4vw, 32px);
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .era-list::before {
  content: "";
  position: absolute;
  left: 56px;
  top: 26px;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, rgba(95, 242, 193, .55), rgba(95, 242, 193, .06));
}

.page-about .era {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
}

.page-about .era-idx {
  position: relative;
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-align: right;
  color: var(--mint);
}

.page-about .era-idx::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 22px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(95, 242, 193, .14);
}

.page-about .era-card {
  padding: 16px 18px;
}

.page-about .era-card .card-text {
  margin-bottom: 0;
  color: var(--text-body);
  line-height: 1.78;
}

/* ---------- 图片容器 ---------- */

.page-about .about-figure {
  margin: clamp(22px, 4vw, 34px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.page-about .about-figure figcaption {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 团队 ---------- */

.page-about .about-lede {
  max-width: 60ch;
  margin-top: 0;
  margin-bottom: 20px;
  color: var(--text-body);
}

.page-about .team-bar {
  display: flex;
  height: 40px;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .team-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  transition: filter .2s ease;
}

.page-about .team-seg--doc {
  flex: 6 1 0;
  background: linear-gradient(180deg, var(--mint-soft), var(--mint));
  color: var(--ink-900);
}

.page-about .team-seg--ver {
  flex: 4 1 0;
  background: linear-gradient(180deg, var(--amber-soft), var(--amber));
  color: var(--ink-900);
}

.page-about .team-seg--sup {
  flex: 8 1 0;
  background: var(--ink-700);
  color: var(--mint);
}

.page-about .team-bar:hover .team-seg {
  filter: brightness(1.06);
}

.page-about .team-cards {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .team-card {
  position: relative;
  padding: 18px 18px 18px 20px;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--mint);
  opacity: 0;
  transition: opacity .2s ease;
}

.page-about .team-card:hover,
.page-about .team-card:focus-visible,
.page-about .team-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--line);
  box-shadow: var(--shadow-md);
}

.page-about .team-card:hover::before,
.page-about .team-card:focus-visible::before,
.page-about .team-card:focus-within::before {
  opacity: 1;
}

.page-about .team-num {
  display: inline-block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .team-card .card-text {
  color: var(--text-body);
  line-height: 1.75;
}

.page-about .team-duty {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line-hair);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 维护节奏 ---------- */

.page-about .log-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .log-row {
  display: grid;
  gap: 5px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-hair);
  transition: background .2s ease;
}

.page-about .log-row:hover {
  background: linear-gradient(90deg, var(--mint-wash), transparent 62%);
}

.page-about .log-when {
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-about .log-what {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-body);
}

.page-about .log-owner {
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 服务原则 ---------- */

.page-about .about-principles {
  display: grid;
  gap: 12px;
}

.page-about .principle {
  padding: 18px;
}

.page-about .principle-idx {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-about .principle .card-text {
  margin-bottom: 0;
  color: var(--text-body);
  line-height: 1.75;
}

/* ---------- 联系 ---------- */

.page-about .about-contact-grid {
  display: grid;
  gap: 12px;
}

.page-about .about-contact-card {
  padding: 18px;
  border: 1px solid var(--line-hair);
  border-radius: var(--radius);
  background: var(--ink-800);
  transition: border-color .2s ease, background .2s ease;
}

.page-about .about-contact-card:hover {
  border-color: var(--line);
  background: var(--ink-700);
}

.page-about .about-contact-key {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .about-contact-val {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.page-about .about-contact-note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-contact-note a,
.page-about .about-contact-tail a {
  color: var(--mint-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(155, 255, 223, .45);
}

.page-about .about-contact-note a:hover,
.page-about .about-contact-tail a:hover {
  color: var(--amber-soft);
  text-decoration-color: currentColor;
}

.page-about .about-contact-tail {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 焦点 ---------- */

.page-about a:focus-visible,
.page-about .team-card:focus-visible {
  outline: 2px solid var(--mint-soft);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-about .about-contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .log-row {
    grid-template-columns: 104px minmax(0, 1fr) 150px;
    align-items: baseline;
    gap: 18px;
  }

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

  .page-about .era {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .era-list::before {
    left: 74px;
  }

  .page-about .era-idx::after {
    right: -14px;
  }
}

@media (min-width: 920px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-origin .grid--split {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, .8fr);
    align-items: start;
  }

  .page-about .about-aside {
    padding-top: 0;
    padding-left: 24px;
    border-top: 0;
    border-left: 1px solid var(--line-hair);
  }
}

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

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

  .page-about .about-contact-card--wide {
    grid-column: span 3;
  }
}

@media (max-width: 420px) {
  .page-about .era {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }

  .page-about .era-list::before {
    left: 46px;
  }

  .page-about .era-idx {
    font-size: 11px;
  }

  .page-about .team-seg {
    font-size: 10.5px;
    letter-spacing: .02em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .about-jump a,
  .page-about .log-row,
  .page-about .about-contact-card,
  .page-about .team-seg {
    transition: none;
  }

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