.page-about {
  --about-rail: 232px;
  --about-gap: clamp(26px, 4vw, 56px);
  --about-amber-ink: #9a5f16;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(18px, 3vw, 32px) clamp(30px, 5vw, 60px);
  background:
    radial-gradient(115% 85% at 92% 0%, rgba(168, 123, 214, 0.24), transparent 62%),
    radial-gradient(90% 75% at 0% 100%, rgba(143, 209, 79, 0.16), transparent 60%);
}

.page-about .about-hero-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
  margin-top: clamp(18px, 3vw, 34px);
}

.page-about .about-hero-lead h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 7vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-about .about-h1-mark {
  display: inline;
  color: var(--grape);
  box-shadow: inset 0 -0.16em 0 rgba(143, 209, 79, 0.5);
}

.page-about .about-hero-lead .lead {
  margin-top: clamp(16px, 2.4vw, 24px);
  max-width: 46ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 0;
  margin-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-about .meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-inline: 16px;
  border-left: 1px solid var(--line);
}

.page-about .meta-item:first-child {
  padding-left: 0;
  border-left: 0;
}

.page-about .meta-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

.page-about .meta-val {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--grape);
}

.page-about .about-hero-media {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--white);
}

.page-about .about-hero-media img,
.page-about .about-section-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-hero-media .media-caption,
.page-about .about-section-media .media-caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}

/* ---------- 主体布局 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  padding-block: clamp(24px, 4vw, 48px) 0;
}

.page-about .about-rail {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding-block: 14px;
}

.page-about .about-rail .toc-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.page-about .about-rail .toc-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail .toc-list > li {
  flex: 0 0 auto;
}

.page-about .about-rail .toc-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-rail .toc-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--grape);
}

.page-about .about-rail .toc-link:hover,
.page-about .about-rail .toc-link[aria-current="true"] {
  border-color: var(--grape);
  background: var(--white);
  color: var(--ink);
}

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

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding-block: clamp(26px, 4vw, 46px);
  border-top: 1px solid var(--line);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px 14px;
  align-items: start;
}

.page-about .about-section-head .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-about .about-note {
  display: none;
}

.page-about .about-section-body {
  margin-top: clamp(16px, 2.6vw, 26px);
}

.page-about .about-section-body .prose {
  max-width: 62ch;
}

.page-about .about-section-body .prose p {
  margin: 0 0 1.1em;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.page-about .about-prose-tight {
  margin-top: clamp(16px, 2.4vw, 22px);
}

.page-about .about-section-media {
  margin: clamp(18px, 3vw, 26px) 0 0;
  border: 1px solid var(--line);
  background: var(--white);
}

/* ---------- 时间线暗区 ---------- */
.page-about .about-night-panel {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(22px, 4vw, 38px);
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(168, 123, 214, 0.34), transparent 62%),
    linear-gradient(165deg, #37205a 0%, var(--night) 58%, #1b0b2c 100%);
  border: 1px solid var(--line-night);
  color: var(--white);
}

.page-about .panel-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--green);
}

.page-about .timeline {
  position: relative;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--green), var(--apricot) 58%, var(--violet-soft));
}

.page-about .timeline-item {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 30px);
}

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

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--night);
  border: 1px solid var(--green);
  transition: background-color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .timeline-item:hover::before {
  background: var(--green);
  border-color: var(--green);
}

.page-about .timeline-year {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--green);
}

.page-about .timeline-title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.4;
  color: var(--white);
}

.page-about .timeline-text {
  margin: 6px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-night);
}

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .team-card {
  padding: 20px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--grape);
  background: var(--white);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-2px);
  border-color: var(--violet-soft);
}

.page-about .team-card--violet {
  border-top-color: var(--grape);
}

.page-about .team-card--green {
  border-top-color: var(--green-deep);
}

.page-about .team-card--apricot {
  border-top-color: var(--apricot);
}

.page-about .team-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
}

.page-about .team-name {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.3;
}

.page-about .team-desc {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-accordion {
  margin-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--line);
}

.page-about .about-accordion .accordion-item {
  border-bottom: 1px solid var(--line);
}

.page-about .about-accordion .accordion-trigger {
  width: 100%;
  padding: 16px 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-accordion .accordion-panel {
  padding: 0 0 16px;
}

.page-about .about-accordion .accordion-panel p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 共建数字 ---------- */
.page-about .partner-figures {
  display: grid;
  gap: 1px;
  margin-top: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .about-figure {
  padding: clamp(18px, 3vw, 26px);
  background: var(--paper);
}

.page-about .about-figure--amber {
  background: var(--apricot-soft);
}

.page-about .figure-num {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 8vw, 68px);
  line-height: 1;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-figure--green .figure-num {
  color: var(--green-deep);
}

.page-about .about-figure--amber .figure-num {
  color: var(--about-amber-ink);
}

.page-about .about-figure--grape .figure-num {
  color: var(--grape);
}

.page-about .figure-label {
  margin: 10px 0 0;
  max-width: 28ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 可回查 ---------- */
.page-about .recall-list {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .recall-item {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .recall-key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--grape);
}

.page-about .recall-text {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  margin-top: clamp(32px, 5vw, 56px);
  padding-block: clamp(26px, 4vw, 44px) clamp(36px, 6vw, 68px);
  border-top: 1px solid var(--line-strong);
}

.page-about .about-next-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.28;
}

.page-about .next-grid {
  display: grid;
  gap: 10px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .next-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 14px;
  align-items: center;
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .next-card:hover {
  transform: translateY(-2px);
  border-color: var(--grape);
}

.page-about .next-card-label {
  grid-column: 1;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
}

.page-about .next-card-text {
  grid-column: 1;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .next-card-arrow {
  grid-column: 2;
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--grape);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 640px) {
  .page-about .partner-figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .recall-item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 6px 20px;
    align-items: start;
  }

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

@media (min-width: 780px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  }

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

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-rail {
    align-self: start;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    border-top: 0;
    border-bottom: 0;
    padding-block: 4px;
  }

  .page-about .about-rail .toc-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-about .about-rail .toc-list > li {
    flex: 0 0 auto;
  }

  .page-about .about-rail .toc-link {
    display: flex;
    width: 100%;
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 1px solid var(--line);
    font-size: 14px;
    white-space: normal;
  }

  .page-about .about-rail .toc-link:hover,
  .page-about .about-rail .toc-link[aria-current="true"] {
    border-left-color: var(--grape);
    background: transparent;
    color: var(--grape);
  }

  .page-about .about-section:first-child {
    padding-top: 0;
  }

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

@media (min-width: 1100px) {
  .page-about .about-section-head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 10px 18px;
  }

  .page-about .about-note {
    display: block;
    height: 84px;
    padding-left: 12px;
    border-left: 1px solid var(--line);
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.2em;
    color: var(--ink-faint);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .next-card,
  .page-about .timeline-item::before,
  .page-about .about-rail .toc-link {
    transition: none;
  }

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