.page-about {
  --about-rail-width: 208px;
  background: var(--paper);
  color: var(--text-ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 48px) 0 clamp(48px, 7vw, 88px);
  background: var(--ink-900);
  color: var(--white);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(200, 162, 74, 0.09) 0 1px,
    transparent 1px 104px
  );
  pointer-events: none;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(32px, 7.2vw, 58px);
  line-height: 1.18;
  letter-spacing: 0.01em;
  margin: 14px 0 0;
  color: var(--white);
}

.page-about .about-hero-lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 250, 246, 0.82);
}

.page-about .about-hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--ink-700);
}

.page-about .about-meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-meta-label {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--gold-soft);
  letter-spacing: 0.04em;
}

.page-about .about-meta-num {
  margin: 0;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.2;
  color: var(--white);
}

.page-about .about-hero-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--ink-700);
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

/* ---------- 由来 ---------- */
.page-about .about-origin {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-origin-grid {
  display: grid;
  gap: 28px;
}

.page-about .chapter-num {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: clamp(38px, 6vw, 56px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-origin-aside .chapter-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.35;
  color: var(--text-ink);
}

.page-about .about-text {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-ink);
}

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

.page-about .about-quote {
  margin: 28px 0 0;
  padding: 6px 0 6px 20px;
  border-left: 3px solid var(--cinnabar);
  font-family: var(--font-serif);
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.58;
  color: var(--ink-800);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding-block: clamp(48px, 7vw, 88px);
  background: var(--ink-900);
}

.page-about .about-band {
  margin: 0 0 clamp(32px, 5vw, 52px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--ink-700);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .about-timeline-head .chapter-title {
  margin: 6px 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.3;
  color: var(--white);
}

.page-about .about-timeline-head .section-lede {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 250, 246, 0.76);
}

.page-about .about-timeline-layout {
  display: grid;
  gap: 24px;
  margin-top: clamp(28px, 5vw, 44px);
}

.page-about .about-rail {
  position: relative;
}

.page-about .about-rail-inner {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .about-rail-link {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-pill);
  text-decoration: none;
  color: rgba(251, 250, 246, 0.62);
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  color: var(--gold-soft);
  border-color: var(--gold);
}

.page-about .about-rail-link[aria-current="true"] {
  color: var(--ink-900);
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-rail-year {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-rail-label {
  font-size: 12px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-about .about-stages {
  position: relative;
}

.page-about .about-stages-curve {
  display: none;
}

.page-about .about-stage {
  position: relative;
  margin-bottom: 16px;
  padding: clamp(20px, 3.4vw, 28px);
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: 24px;
}

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

.page-about .about-stage-num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin-bottom: 8px;
}

.page-about .about-stage-title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 21px;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-stage p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(251, 250, 246, 0.78);
}

.page-about .about-stage-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .about-stage-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(251, 250, 246, 0.7);
  border-top: 1px solid var(--ink-700);
  padding-top: 8px;
}

.page-about .about-stage-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-team-head .chapter-title {
  margin: 6px 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.3;
}

.page-about .about-team-head .section-lede {
  margin: 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-about .about-team-intro {
  display: grid;
  gap: 22px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-team-figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--paper-deep);
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .team-card {
  padding: 22px;
  background: var(--white);
  border: 1px solid var(--paper-deep);
  border-radius: var(--radius-md);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-visible,
.page-about .team-card:focus-within {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: 0 14px 30px rgba(14, 31, 26, 0.1);
  outline: none;
}

.page-about .team-card:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-about .team-card-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--paper-deep);
}

.page-about .team-count {
  font-family: var(--font-num);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-ink);
}

.page-about .team-role {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.4;
  color: var(--text-ink);
}

.page-about .team-desc {
  margin: 14px 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-about .team-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.page-about .team-list li {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-ink);
}

.page-about .team-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .team-extra {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--paper-deep);
}

.page-about .team-extra-label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

/* ---------- 准则 ---------- */
.page-about .about-principles {
  padding-block: clamp(48px, 7vw, 88px);
  background: var(--paper-deep);
}

.page-about .about-principles-head .chapter-title {
  margin: 6px 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.3;
}

.page-about .about-principles-head .section-lede {
  margin: 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-about .about-principle-list {
  margin-top: clamp(24px, 4vw, 38px);
  border-top: 1px solid rgba(42, 76, 62, 0.24);
}

.page-about .principle {
  border-bottom: 1px solid rgba(42, 76, 62, 0.24);
}

.page-about .principle-summary {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
  transition: color 200ms var(--ease);
}

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

.page-about .principle-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-sans);
  font-size: 20px;
  line-height: 1;
  color: var(--gold-ink);
  transition: transform 240ms var(--ease);
}

.page-about .principle[open] .principle-summary::after {
  transform: rotate(45deg);
}

.page-about .principle-summary:hover .principle-title,
.page-about .principle-summary:focus-visible .principle-title {
  color: var(--gold-ink);
}

.page-about .principle-summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -2px;
}

.page-about .principle-num {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  color: var(--gold-ink);
}

.page-about .principle-title {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2.6vw, 23px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-ink);
  transition: color 200ms var(--ease);
}

.page-about .principle-body {
  padding: 0 4px 22px;
}

.page-about .principle-body p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

/* ---------- 规模 ---------- */
.page-about .about-scale {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-scale-head .chapter-title {
  margin: 6px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.3;
}

.page-about .about-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 4vw, 38px);
  background: var(--paper-deep);
  border: 1px solid var(--paper-deep);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 18px;
  background: var(--white);
}

.page-about .about-stat-num {
  font-family: var(--font-num);
  font-size: clamp(26px, 4.6vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink-800);
}

.page-about .about-stat-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}

.page-about .about-scale-body {
  margin-top: clamp(24px, 4vw, 34px);
  max-width: 52em;
}

/* ---------- 合作与出口 ---------- */
.page-about .about-partners {
  padding-block: clamp(48px, 7vw, 88px);
  background: var(--ink-900);
}

.page-about .about-partners-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-partners-copy .chapter-title {
  margin: 6px 0 14px;
  font-family: var(--font-serif);
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.3;
  color: var(--white);
}

.page-about .about-partners-copy .section-lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(251, 250, 246, 0.78);
}

.page-about .about-partner-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-partner-list li {
  padding: 12px 0;
  border-top: 1px solid var(--ink-700);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(251, 250, 246, 0.78);
}

.page-about .about-partner-list strong {
  color: var(--gold-soft);
  font-weight: 600;
  margin-right: 8px;
}

.page-about .about-partner-note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(251, 250, 246, 0.62);
  border-left: 1px solid var(--gold);
  padding-left: 16px;
}

.page-about .about-cta-panel {
  padding: 24px;
  background: var(--ink-800);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-lg);
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-cta-title {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-cta-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-pill);
  text-decoration: none;
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .about-cta-link:hover,
.page-about .about-cta-link:focus-visible {
  border-color: var(--gold);
  background: rgba(200, 162, 74, 0.1);
  transform: translateY(-2px);
  outline: none;
}

.page-about .about-cta-link:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-about .about-cta-kicker {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold-soft);
}

.page-about .about-cta-text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 860px) {
  .page-about .about-hero-grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 5fr 7fr;
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-origin-aside {
    position: sticky;
    top: 108px;
  }

  .page-about .about-timeline-layout {
    grid-template-columns: var(--about-rail-width) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-rail-inner {
    position: sticky;
    top: 108px;
    display: flex;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail-link {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 0 12px 18px;
    border: 0;
    border-left: 1px solid var(--ink-700);
    border-radius: 0;
    background: transparent;
  }

  .page-about .about-rail-link:hover,
  .page-about .about-rail-link:focus-visible {
    background: transparent;
    border-left-color: var(--gold);
    color: var(--gold-soft);
  }

  .page-about .about-rail-link[aria-current="true"] {
    background: transparent;
    border-left: 2px solid var(--gold);
    color: var(--gold);
  }

  .page-about .about-rail-link[aria-current="true"] .about-rail-label {
    color: var(--gold-soft);
  }

  .page-about .about-rail-year {
    font-size: 22px;
    color: inherit;
  }

  .page-about .about-rail-label {
    font-size: 12px;
    white-space: normal;
  }

  .page-about .about-stages {
    padding-left: 34px;
  }

  .page-about .about-stages-curve {
    display: block;
    position: absolute;
    left: 4px;
    top: 0;
    width: 36px;
    height: 100%;
    color: var(--gold);
    opacity: 0.45;
  }

  .page-about .about-stage {
    margin-bottom: 22px;
  }

  .page-about .about-stage:nth-child(even) {
    margin-left: 28px;
  }

  .page-about .about-team-intro {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

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

  .page-about .about-partners-grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

@media (hover: hover) and (pointer: fine) and (min-width: 860px) {
  .page-about .team-extra {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    overflow: hidden;
    border-top-color: transparent;
    opacity: 0;
    transition: max-height 280ms var(--ease), opacity 240ms var(--ease), margin-top 240ms var(--ease), padding-top 240ms var(--ease);
  }

  .page-about .team-card:hover .team-extra,
  .page-about .team-card:focus-within .team-extra,
  .page-about .team-card:focus-visible .team-extra {
    max-height: 220px;
    margin-top: 14px;
    padding-top: 12px;
    border-top-color: var(--paper-deep);
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .about-cta-link,
  .page-about .about-rail-link,
  .page-about .principle-summary::after,
  .page-about .team-extra {
    transition: none;
  }

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