.page-about {
  --about-rule: rgba(15, 46, 38, .16);
  --about-veil: rgba(251, 248, 241, .82);
  color: var(--stone);
  background: var(--cream);
}

.page-about .container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-block: var(--space-3) var(--space-1);
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--slate);
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-inline-end: var(--space-1);
  color: var(--slate);
}

.page-about .breadcrumb-link {
  color: var(--deep-gold);
  text-decoration: none;
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  text-decoration: underline;
}

/* ---------- 通用章节标题 ---------- */
.page-about .section {
  padding-block: var(--space-6);
}

.page-about .section--tight {
  padding-block: var(--space-4);
}

.page-about .section-head {
  margin-block-end: var(--space-5);
}

.page-about .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-2);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--deep-gold);
  text-transform: none;
}

.page-about .eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
}

.page-about .section-title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(24px, 5.2vw, 34px);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--stone);
}

/* ---------- 品牌声明 ---------- */
.page-about .about-oath {
  background:
    linear-gradient(180deg, var(--mist) 0%, var(--cream) 100%);
  border-block-end: 1px solid var(--about-rule);
}

.page-about .oath-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.page-about .oath-copy h1 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(28px, 7.4vw, 46px);
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .oath-signs {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin-block-start: var(--space-4);
  padding-block-start: var(--space-4);
  border-block-start: 1px solid var(--about-rule);
}

.page-about .oath-sign {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .oath-sign-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--deep-gold);
}

.page-about .oath-sign-unit {
  font-size: 13px;
  font-weight: 600;
  margin-inline-start: 2px;
  color: var(--slate);
}

.page-about .oath-sign-label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate);
}

.page-about .oath-plate {
  margin: 0;
}

.page-about .oath-plate .media-frame {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--gold-25);
  box-shadow: 0 18px 46px rgba(15, 46, 38, .14);
}

.page-about .oath-plate img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .oath-plate figcaption {
  margin-block-start: var(--space-2);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
}

/* ---------- 三条准则 ---------- */
.page-about .about-rules {
  background: var(--cream);
}

.page-about .rule-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.page-about .rule-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  padding-block-end: var(--space-4);
  border-block-end: 1px solid var(--about-rule);
}

.page-about .rule-item:last-child {
  border-block-end: none;
  padding-block-end: 0;
}

.page-about .rule-num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 9vw, 60px);
  font-weight: 700;
  line-height: .95;
  font-variant-numeric: tabular-nums;
  color: transparent;
  -webkit-text-stroke: 1px var(--gold);
  transition: color var(--dur) var(--ease), -webkit-text-stroke-color var(--dur) var(--ease);
}

.page-about .rule-item:hover .rule-num,
.page-about .rule-item:focus-within .rule-num {
  color: var(--gold-25);
  -webkit-text-stroke-color: var(--gold);
}

.page-about .rule-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-title);
  font-size: clamp(19px, 4.4vw, 24px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .rule-text {
  margin: 0 0 var(--space-2);
  font-size: 15px;
  line-height: 1.85;
  color: var(--stone);
}

.page-about .rule-hint {
  margin: 0;
  padding-inline-start: var(--space-2);
  border-inline-start: 2px solid var(--sand);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  background:
    linear-gradient(180deg, var(--moss) 0%, var(--ink) 100%);
  color: var(--cream);
}

.page-about .about-timeline .section-title {
  color: var(--cream);
}

.page-about .about-timeline .eyebrow {
  color: var(--sand);
}

.page-about .timeline-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-about .year-rail {
  border: 1px solid rgba(200, 169, 106, .32);
  border-radius: var(--radius-card);
  padding: var(--space-3);
  background: rgba(15, 46, 38, .34);
}

.page-about .year-rail-label {
  margin: 0 0 var(--space-2);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--sand);
}

.page-about .year-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .year-link {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid rgba(200, 169, 106, .4);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
  color: var(--sand);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .year-link:hover,
.page-about .year-link:focus-visible {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

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

.page-about .stage-list::before {
  content: "";
  position: absolute;
  inset-block: 8px;
  inset-inline-start: 7px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-40), rgba(200, 169, 106, .06));
}

.page-about .stage-item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2);
  padding-block-end: var(--space-4);
  padding-inline-start: var(--space-4);
}

.page-about .stage-item:last-child {
  padding-block-end: 0;
}

.page-about .stage-item::before {
  content: "";
  position: absolute;
  inset-inline-start: 2px;
  inset-block-start: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .stage-item:hover::before {
  transform: scale(1.3);
  background: var(--gold);
}

.page-about .stage-year {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
  padding-block-start: 4px;
}

.page-about .stage-title {
  margin: 0 0 6px;
  font-family: var(--font-title);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .stage-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--cream-70);
}

.page-about .archive-plate {
  margin: 0;
}

.page-about .archive-plate .media-frame {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid rgba(200, 169, 106, .3);
}

.page-about .archive-plate img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .archive-plate figcaption {
  margin-block-start: var(--space-2);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cream-55);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--mist);
}

.page-about .team-mosaic {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-about .team-card {
  padding: var(--space-3);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-card);
  background: var(--cream);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--gold-40);
  box-shadow: 0 14px 32px rgba(15, 46, 38, .10);
}

.page-about .team-card .tag {
  display: inline-block;
  margin-block-end: var(--space-2);
  padding: 4px 10px;
  font-size: 12px;
  letter-spacing: .04em;
  border-radius: var(--radius-pill);
}

.page-about .team-card--wide {
  background: var(--ink);
  border-color: var(--ink);
  padding: var(--space-4) var(--space-3);
}

.page-about .team-card--wide .tag--moss {
  background: rgba(200, 169, 106, .16);
  color: var(--sand);
}

.page-about .team-card--wide .team-title {
  color: var(--cream);
}

.page-about .team-card--wide .team-text {
  color: var(--cream-70);
}

.page-about .team-card:not(.team-card--wide) .tag--moss {
  background: rgba(111, 140, 134, .14);
  color: var(--moss);
}

.page-about .team-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .team-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .team-rhythm {
  margin-block-start: var(--space-4);
  padding: var(--space-3);
  border-radius: var(--radius-card);
  background: var(--cream);
  border: 1px dashed var(--gold-40);
}

.page-about .team-rhythm-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-title);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--deep-gold);
}

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

.page-about .rhythm-list li {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: var(--space-2);
  align-items: baseline;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
  padding-block-end: 10px;
  border-block-end: 1px solid var(--ink-08);
}

.page-about .rhythm-list li:last-child {
  border-block-end: none;
  padding-block-end: 0;
}

.page-about .rhythm-list .num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--moss);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  background: var(--cream);
}

.page-about .eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.page-about .eco-note {
  margin: var(--space-3) 0 0;
  padding: var(--space-2) var(--space-3);
  border-inline-start: 2px solid var(--gold);
  background: var(--mist);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .eco-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-block-start: var(--space-4);
}

.page-about .eco-links .btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .eco-links .btn--outline {
  border: 1px solid var(--gold);
  color: var(--deep-gold);
  background: transparent;
}

.page-about .eco-links .btn--outline:hover,
.page-about .eco-links .btn--outline:focus-visible {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--cream);
}

.page-about .eco-links .btn--ghost {
  border: 1px solid var(--ink-14);
  color: var(--ink);
  background: transparent;
}

.page-about .eco-links .btn--ghost:hover,
.page-about .eco-links .btn--ghost:focus-visible {
  border-color: var(--ink);
  background: var(--mist);
}

.page-about .eco-seals {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  align-content: flex-start;
}

.page-about .seal {
  width: 148px;
  height: 148px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-align: center;
  padding: var(--space-2);
  background:
    radial-gradient(circle at 32% 26%, rgba(217, 185, 138, .22), transparent 62%),
    var(--mist);
  transition: transform var(--dur) var(--ease);
}

.page-about .seal:hover {
  transform: rotate(-3deg) scale(1.03);
}

.page-about .seal--offset {
  margin-block-start: var(--space-4);
  border-style: dashed;
  border-color: var(--clay);
  background:
    radial-gradient(circle at 68% 30%, rgba(181, 106, 76, .14), transparent 64%),
    var(--cream);
}

.page-about .seal-year {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: .06em;
  color: var(--deep-gold);
}

.page-about .seal--offset .seal-year {
  color: var(--clay);
}

.page-about .seal-name {
  font-family: var(--font-title);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

/* ---------- 本地承诺 ---------- */
.page-about .about-local {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-6);
  background: var(--ink);
  color: var(--cream);
  isolation: isolate;
}

.page-about .local-scene {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: .30;
}

.page-about .local-scene img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(.72);
}

.page-about .about-local::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(160deg, rgba(15, 46, 38, .94) 0%, rgba(30, 77, 61, .86) 58%, rgba(15, 46, 38, .92) 100%);
}

.page-about .about-local .eyebrow {
  color: var(--sand);
}

.page-about .local-inner {
  max-width: 760px;
}

.page-about .about-local .section-title {
  color: var(--cream);
}

.page-about .about-local .lede {
  color: var(--cream-70);
}

.page-about .local-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-block-start: var(--space-4);
}

.page-about .local-col {
  padding-block-start: var(--space-2);
  border-block-start: 1px solid rgba(200, 169, 106, .34);
}

.page-about .local-col-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 700;
  color: var(--sand);
}

.page-about .local-col-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--cream-70);
}

.page-about .local-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-block-start: var(--space-5);
}

.page-about .local-actions .btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .local-actions .btn--gold {
  background: var(--gold);
  color: var(--ink);
  border: 1px solid var(--gold);
}

.page-about .local-actions .btn--gold:hover,
.page-about .local-actions .btn--gold:focus-visible {
  background: var(--sand);
  border-color: var(--sand);
}

.page-about .local-actions .btn--outline {
  border: 1px solid rgba(244, 239, 228, .5);
  color: var(--cream);
  background: transparent;
}

.page-about .local-actions .btn--outline:hover,
.page-about .local-actions .btn--outline:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  background: var(--mist);
  padding-block: var(--space-5);
  border-block-start: 1px solid var(--about-rule);
}

.page-about .next-bar {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  align-items: start;
}

.page-about .next-text {
  margin: 0;
  font-family: var(--font-title);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .next-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-about .next-links a {
  display: block;
  padding-block: 10px;
  border-block-end: 1px solid var(--ink-08);
  font-size: 14px;
  color: var(--moss);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-inline-start var(--dur) var(--ease);
}

.page-about .next-links a:hover,
.page-about .next-links a:focus-visible {
  color: var(--deep-gold);
  padding-inline-start: 6px;
}

/* ---------- 视窗进入 ---------- */
.page-about [data-reveal] {
  opacity: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal] {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 320ms var(--ease), transform 320ms var(--ease);
  }

  .page-about [data-reveal][data-revealed="true"] {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .oath-signs {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
  }

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

  .page-about .team-card--wide {
    grid-column: span 2;
  }

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

  .page-about .next-bar {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-4);
  }

  .page-about .next-links {
    grid-template-columns: 1fr;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .section {
    padding-block: var(--space-7);
  }

  .page-about .about-local {
    padding-block: var(--space-7);
  }

  .page-about .oath-grid {
    grid-template-columns: 7fr 4fr;
    gap: var(--space-6);
    align-items: start;
  }

  .page-about .oath-plate {
    margin-block-start: var(--space-5);
  }

  .page-about .rule-item {
    grid-template-columns: 120px 1fr;
    gap: var(--space-4);
  }

  .page-about .timeline-layout {
    grid-template-columns: 150px 1fr 220px;
    gap: var(--space-4);
    align-items: start;
  }

  .page-about .year-rail {
    position: sticky;
    top: 120px;
  }

  .page-about .year-list {
    flex-direction: column;
    overflow: visible;
  }

  .page-about .year-link {
    display: block;
    width: 100%;
    text-align: center;
  }

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

  .page-about .team-card--wide {
    grid-column: span 3;
    padding: var(--space-5);
  }

  .page-about .team-mosaic .team-card:nth-child(2) {
    transform: translateY(-14px);
  }

  .page-about .team-mosaic .team-card:nth-child(4) {
    transform: translateY(14px);
  }

  .page-about .team-mosaic .team-card:nth-child(2):hover,
  .page-about .team-mosaic .team-card:nth-child(4):hover {
    transform: translateY(-18px);
  }

  .page-about .team-rhythm {
    padding: var(--space-4) var(--space-5);
  }

  .page-about .rhythm-list {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2) var(--space-4);
  }

  .page-about .rhythm-list li {
    border-block-end: none;
    padding-block-end: 0;
  }

  .page-about .eco-grid {
    grid-template-columns: 6fr 4fr;
    gap: var(--space-6);
    align-items: start;
  }

  .page-about .eco-seals {
    justify-content: flex-end;
    padding-block-start: var(--space-5);
  }

  .page-about .seal {
    width: 168px;
    height: 168px;
  }

  .page-about .seal--offset {
    margin-block-start: var(--space-5);
    margin-inline-start: -24px;
  }

  .page-about .local-columns {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }

  .page-about .local-inner {
    max-width: 820px;
  }
}
<<<END>>>