.page-about {
  --about-rule: rgba(14, 39, 73, 0.14);
  --about-gold-rule: rgba(201, 162, 39, 0.38);
  padding-top: 0;
  background: var(--cream);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 38px) 0 52px;
  background:
    radial-gradient(circle at 84% 14%, rgba(201, 162, 39, 0.24), transparent 58%),
    radial-gradient(circle at 8% 92%, rgba(232, 103, 75, 0.18), transparent 55%),
    linear-gradient(165deg, var(--royal) 0%, var(--royal-2) 54%, var(--royal-3) 100%);
  color: var(--cream);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(230, 206, 140, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230, 206, 140, 0.08) 1px, transparent 1px);
  background-size: 68px 68px;
  -webkit-mask-image: radial-gradient(circle at 28% 24%, #000 0%, transparent 74%);
  mask-image: radial-gradient(circle at 28% 24%, #000 0%, transparent 74%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: 46px;
  width: 260px;
  height: 260px;
  border: 2px solid rgba(201, 162, 39, 0.32);
  border-radius: 50%;
  z-index: -1;
}

.page-about .about-hero__crumb {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: rgba(246, 241, 231, 0.58);
}

.page-about .about-hero__crumb a {
  color: rgba(246, 241, 231, 0.78);
  text-decoration: none;
}

.page-about .about-hero__crumb a:hover {
  color: var(--gold-light);
}

.page-about .about-hero__eyebrow {
  margin-top: 22px;
  color: var(--gold-light);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 22ch;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(28px, 6.6vw, 58px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 54ch;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: rgba(246, 241, 231, 0.82);
}

.page-about .about-figures {
  list-style: none;
  margin: 34px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--about-gold-rule);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .about-figures__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(22px, 3.6vw, 32px);
  letter-spacing: 0.02em;
  color: var(--gold-light);
}

.page-about .about-figures__label {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-12);
  letter-spacing: 0.05em;
  color: rgba(246, 241, 231, 0.62);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  padding-top: 6px;
  padding-bottom: 0;
}

/* ---------- 章节目录 ---------- */
.page-about .about-rail {
  padding: 14px 0 16px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-rail__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--fog);
}

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

.page-about .about-rail .toc-link {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  padding: 8px 13px;
  border: 1px solid var(--about-rule);
  border-radius: 999px;
  background: #fff;
  font-size: var(--fs-12);
  color: var(--royal);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-about .about-rail .toc-link:hover {
  border-color: var(--gold);
  color: var(--gold-deep);
}

.page-about .about-rail .toc-link.is-active {
  border-color: var(--royal);
  background: var(--royal);
  color: var(--cream);
}

.page-about .toc-num {
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fog);
}

.page-about .about-rail .toc-link.is-active .toc-num {
  color: var(--gold-light);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: 46px 0 6px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-section--first {
  padding-top: 40px;
  border-top: 0;
}

.page-about .about-section__title {
  margin: 12px 0 0;
  max-width: 28ch;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(23px, 4.6vw, 36px);
  line-height: 1.32;
  color: var(--royal);
}

.page-about .about-section__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: var(--fs-17);
  line-height: 1.85;
  color: #2c3038;
}

.page-about .about-section p + p {
  margin-top: 14px;
}

.page-about .about-section p {
  font-size: var(--fs-17);
  line-height: 1.85;
  color: #33383f;
}

/* ---------- 序言 ---------- */
.page-about .about-quote {
  margin: 28px 0 0;
  padding: 6px 0 6px 20px;
  border-left: 3px solid var(--gold);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(20px, 3.8vw, 30px);
  line-height: 1.55;
  color: var(--royal);
}

.page-about .about-quote::first-letter {
  float: left;
  margin: 8px 12px 0 0;
  font-size: 3.1em;
  line-height: 0.86;
  color: var(--gold);
}

/* ---------- 五条准则 ---------- */
.page-about .about-principles {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .principle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .principle__num {
  grid-row: span 2;
  align-self: start;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--royal);
  box-shadow: 3px 3px 0 rgba(232, 103, 75, 0.95);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--gold-light);
}

.page-about .principle__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--fs-20);
  line-height: 1.45;
  color: var(--royal);
  transition: color 0.25s var(--ease);
}

.page-about .principle__text {
  font-size: 15px;
  line-height: 1.8;
  color: #3a3f48;
}

.page-about .principle:hover .principle__title {
  color: var(--coral);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 3px solid var(--royal);
  box-shadow: var(--shadow-hard);
  background: var(--paper);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--fog);
}

.page-about .about-figure--clip::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 30px solid var(--cream);
  border-left: 30px solid var(--gold);
  transition: border-top-width 0.3s var(--ease), border-left-width 0.3s var(--ease);
}

.page-about .about-figure--clip:hover::after {
  border-top-width: 18px;
  border-left-width: 18px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-about .about-team__text p {
  font-size: var(--fs-17);
  line-height: 1.85;
  color: #33383f;
}

.page-about .about-stats {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.page-about .about-stats li {
  padding: 4px 0 4px 12px;
  border-left: 3px solid var(--gold);
}

.page-about .about-stats strong {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--fs-26);
  color: var(--royal);
}

.page-about .about-stats span {
  display: block;
  margin-top: 4px;
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--fog);
}

/* ---------- 覆盖地图 ---------- */
.page-about .about-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}

.page-about .zone {
  position: relative;
  min-height: 98px;
  padding: 14px 12px;
  border: 2px solid var(--royal);
  background: var(--royal);
  color: var(--cream);
  transition: transform 0.28s var(--ease), background 0.28s var(--ease),
    border-color 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .zone--mid {
  background: var(--royal-2);
  border-color: var(--royal-2);
}

.page-about .zone--edge {
  background: rgba(22, 52, 92, 0.78);
  border-color: rgba(14, 39, 73, 0.45);
}

.page-about .zone__name {
  display: block;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--fs-17);
  line-height: 1.3;
}

.page-about .zone__note {
  display: block;
  margin-top: 8px;
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: rgba(246, 241, 231, 0.7);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-about .zone:hover,
.page-about .zone:focus-within {
  transform: translateY(-3px);
  border-color: var(--gold);
  background: var(--royal-3);
  box-shadow: 0 6px 0 rgba(201, 162, 39, 0.9);
}

.page-about .zone:hover .zone__note,
.page-about .zone:focus-within .zone__note,
.page-about .zone:focus .zone__note {
  opacity: 1;
  transform: none;
}

.page-about .zone:focus {
  outline: 2px dashed var(--gold);
  outline-offset: 2px;
}

.page-about .about-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 16px 0 0;
  font-size: var(--fs-12);
  color: var(--fog);
}

.page-about .about-legend__swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-right: 6px;
  vertical-align: -1px;
  border: 1px solid rgba(14, 39, 73, 0.35);
  background: var(--royal);
}

.page-about .about-legend__swatch--mid {
  background: var(--royal-2);
}

.page-about .about-legend__swatch--edge {
  background: rgba(22, 52, 92, 0.6);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-wrap {
  display: grid;
  gap: 30px;
  margin-top: 28px;
}

.page-about .about-timeline__figure {
  margin-bottom: 28px;
}

.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0 0 0 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 162, 39, 0.14) 100%);
}

.page-about .about-tl {
  position: relative;
  padding-bottom: 22px;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 12px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--cream);
  border: 3px solid var(--gold);
  box-sizing: border-box;
}

.page-about .about-tl__details summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl__details summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--coral);
}

.page-about .about-tl__details[open] summary::after {
  content: "–";
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--fs-20);
  color: var(--gold-deep);
}

.page-about .about-tl__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--fs-20);
  line-height: 1.4;
  color: var(--royal);
  transition: color 0.25s var(--ease);
}

.page-about .about-tl__details[open] .about-tl__title {
  color: var(--coral);
}

.page-about .about-tl__body {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: #3a3f48;
}

.page-about .about-note {
  padding: 20px;
  border: 3px solid var(--royal);
  background: #fff;
  box-shadow: var(--shadow-gold);
}

.page-about .about-note__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--fs-20);
  color: var(--royal);
}

.page-about .about-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #3a3f48;
}

.page-about .about-note p + p {
  margin-top: 10px;
}

.page-about .about-note__link,
.page-about .about-inline-link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--royal);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 3px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-note__link:hover,
.page-about .about-inline-link:hover {
  color: var(--coral);
  border-color: var(--coral);
}

/* ---------- 社区行动 ---------- */
.page-about .about-community {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-about .about-community__text p {
  font-size: var(--fs-17);
  line-height: 1.85;
  color: #33383f;
}

/* ---------- 认可与合作 ---------- */
.page-about .about-panel {
  margin-top: 26px;
  padding: 24px 20px;
  border: 3px solid var(--royal-3);
  background: var(--royal);
  box-shadow: var(--shadow-gold);
  color: var(--cream);
}

.page-about .about-panel__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-panel__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--fs-34);
  line-height: 1.1;
  color: var(--gold-light);
}

.page-about .about-panel__cell p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(246, 241, 231, 0.78);
}

.page-about .about-panel__subtitle {
  margin: 24px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--about-gold-rule);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: var(--fs-17);
  color: var(--cream);
}

.page-about .about-eco {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-eco li {
  padding: 6px 13px;
  border: 1px solid rgba(230, 206, 140, 0.5);
  border-radius: 999px;
  font-size: var(--fs-12);
  letter-spacing: 0.03em;
  color: var(--gold-light);
}

.page-about .about-panel__note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(246, 241, 231, 0.72);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  margin-top: 40px;
  padding: 32px 0 56px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(22px, 4.2vw, 32px);
  line-height: 1.35;
  color: var(--royal);
}

.page-about .about-cta__text {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: var(--fs-17);
  line-height: 1.8;
  color: #33383f;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-cta__more {
  margin: 16px 0 0;
  font-size: var(--fs-14);
  color: var(--fog);
}

.page-about .about-cta__more a {
  color: var(--royal);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
}

.page-about .about-cta__more a:hover {
  color: var(--coral);
  border-color: var(--coral);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero {
    padding-bottom: 64px;
  }

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

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

  .page-about .about-panel {
    padding: 32px 28px;
  }

  .page-about .about-panel__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 860px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .about-community {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
    gap: 48px;
  }

  .page-about .about-note {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    padding: 24px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 44px;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    padding: 4px 0 0 16px;
    border-bottom: 0;
    border-left: 1px solid var(--about-gold-rule);
  }

  .page-about .about-rail .toc-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail .toc-list li + li {
    margin-top: 2px;
  }

  .page-about .about-rail .toc-link {
    display: block;
    padding: 7px 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    font-size: var(--fs-14);
    color: #3a3f48;
  }

  .page-about .about-rail .toc-link:hover {
    color: var(--gold-deep);
  }

  .page-about .about-rail .toc-link.is-active {
    background: transparent;
    color: var(--royal);
    font-weight: 700;
  }

  .page-about .about-rail .toc-link.is-active .toc-num {
    color: var(--coral);
  }

  .page-about .about-section {
    padding-top: 54px;
  }

  .page-about .about-section--first {
    padding-top: 4px;
  }

  .page-about .about-quote {
    padding-left: 26px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 56px);
    padding-bottom: 76px;
  }

  .page-about .about-body {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 72px;
  }

  .page-about .zone {
    min-height: 106px;
    padding: 16px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .zone,
  .page-about .zone__note,
  .page-about .principle__title,
  .page-about .about-figure--clip::after,
  .page-about .about-tl__title {
    transition: none;
  }

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