.page-about {
  --about-index-w: 176px;
  --about-rule: 1px solid var(--c-paper-300);
  background: var(--c-paper-100);
  color: var(--c-graphite-800);
  font-family: var(--font-sans);
}

.page-about .crumbs {
  padding-block: 18px 0;
  background: var(--c-ink-900);
  color: rgba(244, 234, 215, 0.62);
}

.page-about .crumbs a {
  color: var(--c-amber-200);
  text-decoration: none;
}

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  text-decoration: underline;
}

.page-about .crumbs .crumbs__sep {
  margin-inline: 8px;
  color: rgba(244, 234, 215, 0.35);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--c-ink-900);
  color: var(--c-paper-100);
  padding-block: clamp(28px, 4vw, 48px) clamp(40px, 6vw, 80px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(111, 243, 168, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(111, 243, 168, 0.055) 1px, transparent 1px);
  background-size: 52px 52px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--c-amber-500), rgba(227, 155, 58, 0) 62%);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-hero .kicker {
  color: var(--c-crt-400);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  margin: 0 0 14px;
}

.page-about .about-hero h1 {
  font-family: var(--font-condensed);
  font-weight: 900;
  font-size: clamp(1.75rem, 5.4vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  max-width: 20ch;
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 234, 215, 0.82);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  background: rgba(220, 205, 178, 0.26);
  border: 1px solid rgba(220, 205, 178, 0.26);
}

.page-about .about-figures__item {
  background: var(--c-ink-900);
  padding: 12px 14px 14px;
}

.page-about .about-figures dt {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(244, 234, 215, 0.6);
}

.page-about .about-figures dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(22px, 3.4vw, 28px);
  line-height: 1;
  color: var(--c-amber-500);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(243, 206, 146, 0.32);
  filter: saturate(0.86) contrast(1.04);
}

/* ---------- 正文骨架 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  padding-block: clamp(28px, 4vw, 56px) clamp(48px, 7vw, 96px);
}

.page-about .about-index {
  border-top: var(--about-rule);
  padding-top: 14px;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  color: var(--c-slate-500);
}

.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-index a {
  display: block;
  padding: 5px 10px;
  border: 1px solid var(--c-paper-300);
  font-size: 12px;
  line-height: 1.4;
  color: var(--c-slate-500);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--c-ink-900);
  border-color: var(--c-amber-500);
  background: rgba(227, 155, 58, 0.1);
  outline: none;
}

/* ---------- 章节 ---------- */

.page-about .about-section {
  border-top: var(--about-rule);
  padding-block: clamp(24px, 4vw, 44px);
  scroll-margin-top: 92px;
}

.page-about .about-section__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-about .about-section__head h2 {
  font-family: var(--font-condensed);
  font-weight: 700;
  font-size: clamp(1.25rem, 3vw, 1.9rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0;
  max-width: 24ch;
}

.page-about .about-section__tag {
  flex: none;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.28em;
  color: var(--c-slate-500);
  border-right: 1px solid var(--c-paper-300);
  padding-right: 6px;
  min-height: 60px;
}

.page-about .about-section__body p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  max-width: 66ch;
}

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

.page-about .about-section__body a {
  color: var(--c-rust-600);
  text-decoration: none;
  border-bottom: 1px solid rgba(180, 85, 47, 0.4);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-section__body a:hover,
.page-about .about-section__body a:focus-visible {
  color: var(--c-ink-900);
  border-bottom-color: var(--c-ink-900);
  outline: none;
}

.page-about .about-section__body--wide {
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

/* ---------- 四类内容 ---------- */

.page-about .about-columns {
  list-style: none;
  margin: clamp(16px, 2.4vw, 22px) 0 clamp(20px, 3vw, 30px);
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--c-paper-300);
  border: 1px solid var(--c-paper-300);
}

.page-about .about-columns li {
  background: var(--c-paper-100);
  padding: 18px 18px 20px;
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-columns li:hover {
  background: var(--c-ink-900);
  color: var(--c-paper-100);
}

.page-about .about-columns li:hover h3 {
  color: var(--c-amber-200);
}

.page-about .about-columns li:hover p {
  color: rgba(244, 234, 215, 0.78);
}

.page-about .about-columns__no {
  display: block;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-amber-500);
  margin-bottom: 8px;
}

.page-about .about-columns h3 {
  margin: 0 0 8px;
  font-family: var(--font-condensed);
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ink-900);
  transition: color var(--dur) var(--ease);
}

.page-about .about-columns p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-slate-500);
  transition: color var(--dur) var(--ease);
}

/* ---------- 状态提示条 ---------- */

.page-about .about-note {
  margin-top: clamp(18px, 2.6vw, 26px);
  border-left: 3px solid var(--c-crt-400);
  background: var(--c-ink-700);
  color: var(--c-paper-100);
  padding: 16px 18px;
  display: grid;
  gap: 8px;
}

.page-about .about-note p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244, 234, 215, 0.82);
}

.page-about .about-note .status {
  color: var(--c-crt-400);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0 0 10px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(216px, 1fr);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-timeline::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-timeline::-webkit-scrollbar-thumb {
  background: var(--c-paper-300);
}

.page-about .about-timeline__node {
  position: relative;
  padding: 26px 20px 8px 16px;
  border-left: 1px solid var(--c-paper-300);
}

.page-about .about-timeline__node::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--c-paper-300);
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--c-crt-400);
  box-shadow: 0 0 0 3px var(--c-paper-100);
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-timeline__node:hover::before {
  background: var(--c-amber-500);
  transform: scale(1.25);
}

.page-about .about-timeline__stage {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--c-ink-900);
  margin-bottom: 10px;
}

.page-about .about-timeline__node p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-slate-500);
}

.page-about .about-timeline__series {
  display: block;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--c-paper-300);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-amber-500);
}

/* ---------- 正文配图 ---------- */

.page-about .about-figure {
  margin: clamp(22px, 3.2vw, 34px) 0 clamp(18px, 2.6vw, 26px);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--c-paper-300);
  filter: saturate(0.88) contrast(1.02);
}

.page-about .about-figure figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--c-slate-500);
}

/* ---------- 团队表格 ---------- */

.page-about .about-team-wrap {
  overflow-x: auto;
  margin-top: clamp(16px, 2.4vw, 22px);
}

.page-about .about-team {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 13.5px;
}

.page-about .about-team__caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--c-slate-500);
  padding-bottom: 10px;
}

.page-about .about-team th,
.page-about .about-team td {
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--c-paper-300);
  padding: 12px 14px 12px 0;
}

.page-about .about-team thead th {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--c-slate-500);
  padding-bottom: 8px;
}

.page-about .about-team tbody th {
  font-weight: 700;
  color: var(--c-ink-900);
  white-space: nowrap;
}

.page-about .about-team tbody th .status__dot {
  margin-right: 8px;
}

.page-about .about-team tbody td {
  color: var(--c-slate-500);
  line-height: 1.7;
}

.page-about .about-team tbody tr {
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-team tbody tr:hover {
  background: rgba(227, 155, 58, 0.13);
}

/* ---------- 联系引导 ---------- */

.page-about .about-cta {
  margin-top: clamp(20px, 3vw, 30px);
  border: 1px solid var(--c-ink-900);
  background: var(--c-paper-100);
  padding: 18px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.page-about .about-cta__title {
  margin: 0 0 6px;
  font-family: var(--font-condensed);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.5;
  color: var(--c-ink-900);
}

.page-about .about-cta__sub {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-slate-500);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(220px, 0.55fr);
    align-items: end;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 92px;
    border-top: 0;
    padding-top: 0;
    border-left: 1px solid var(--c-paper-300);
    padding-left: 14px;
  }

  .page-about .about-index ol {
    display: block;
  }

  .page-about .about-index a {
    border: 0;
    border-left: 2px solid transparent;
    padding: 6px 0 6px 12px;
    margin-left: -16px;
    white-space: normal;
    font-size: 13px;
    background: none;
  }

  .page-about .about-index a:hover,
  .page-about .about-index a:focus-visible {
    border-left-color: var(--c-amber-500);
    color: var(--c-ink-900);
    background: none;
  }

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

  .page-about .about-timeline {
    grid-auto-columns: minmax(0, 1fr);
    overflow-x: visible;
  }

  .page-about .about-section:nth-of-type(odd) .about-section__body {
    max-width: 68ch;
  }

  .page-about .about-section:nth-of-type(even) .about-section__body {
    max-width: 84ch;
  }
}

@media (hover: hover) and (pointer: fine) {
  .page-about .about-timeline__series {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding-top: 0;
    border-top-color: transparent;
    margin-top: 0;
    transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease),
      margin-top var(--dur) var(--ease), padding-top var(--dur) var(--ease);
  }

  .page-about .about-timeline__node:hover .about-timeline__series,
  .page-about .about-timeline__node:focus-within .about-timeline__series {
    max-height: 6em;
    opacity: 1;
    margin-top: 10px;
    padding-top: 8px;
    border-top-color: var(--c-paper-300);
  }
}
<<<END>>>