.page-about {
  --about-pad-y: clamp(52px, 8vw, 96px);
  --about-gap: clamp(20px, 3vw, 34px);
  background: var(--warm);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: clamp(16px, 2.6vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4.5vw, 52px);
  align-items: end;
  padding: clamp(18px, 3vw, 36px) 0 clamp(46px, 7vw, 88px);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 5.4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--grape-deep);
  margin: 14px 0 0;
}

.page-about .eyebrow {
  color: var(--grape);
  margin: 0;
}

.page-about .about-hero-lede {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 46ch;
  font-size: clamp(0.95rem, 1.15vw, 1.05rem);
  line-height: 1.78;
  color: var(--text-muted);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--mist);
  border: 1px solid var(--mist);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .about-stats li {
  background: var(--warm);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  font-weight: 600;
  color: var(--grape);
  letter-spacing: -0.01em;
}

.page-about .stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.page-about .about-hero-visual {
  margin: 0;
  position: relative;
}

.page-about .about-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-board);
}

.page-about .about-hero-visual::after {
  content: "";
  position: absolute;
  inset: 14px -10px -10px 14px;
  border: 1px solid var(--green);
  border-radius: var(--radius);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero-visual figcaption {
  margin-top: 12px;
  color: var(--text-muted);
}

/* ---------- 通用章节头 ---------- */
.page-about .board-index {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  font-weight: 600;
  line-height: 1;
  color: var(--mist);
  letter-spacing: -0.03em;
}

.page-about .board-index--dark {
  color: rgba(168, 213, 162, 0.45);
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 2.8vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--grape-deep);
  margin: 10px 0 0;
}

.page-about .about-h2--dark {
  color: var(--warm);
}

.page-about .about-h2--small {
  font-size: clamp(1.35rem, 2.2vw, 1.9rem);
}

.page-about .about-section-head {
  margin-bottom: clamp(28px, 4vw, 46px);
  max-width: 62ch;
}

.page-about .about-section-lede {
  margin: 14px 0 0;
  font-size: 0.975rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-about .about-section-lede--dark {
  color: var(--text-on-dark-soft);
}

/* ---------- 品牌自述 ---------- */
.page-about .about-voice {
  padding-bottom: var(--about-pad-y);
}

.page-about .about-voice-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 48px);
  border-top: 1px solid var(--line);
  padding-top: clamp(30px, 4vw, 52px);
}

.page-about .about-voice-body p {
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--text);
  max-width: 52ch;
}

.page-about .about-voice-body .about-lead {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 1.9vw, 1.45rem);
  line-height: 1.5;
  color: var(--grape);
  margin-bottom: 20px;
}

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

.page-about .about-voice-sign {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.02em;
  color: var(--green-vein);
  border-left: 3px solid var(--amber);
  padding-left: 14px;
  margin-top: 22px !important;
}

/* ---------- 三条原则 ---------- */
.page-about .about-principles {
  padding-bottom: var(--about-pad-y);
}

.page-about .principle-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .principle {
  background: var(--surface);
  border: 1px solid var(--mist);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 30px);
  box-shadow: var(--shadow-board);
  transform: rotate(-0.4deg);
}

.page-about .principle:nth-child(2) {
  transform: rotate(0.5deg);
}

.page-about .principle:nth-child(3) {
  transform: rotate(-0.2deg);
}

.page-about .principle-no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--green-vein);
  margin-bottom: 10px;
}

.page-about .principle-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  line-height: 1.35;
  color: var(--grape-deep);
  margin: 0 0 10px;
}

.page-about .principle p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text-muted);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background: var(--lilac);
  clip-path: polygon(0 0, 100% 34px, 100% 100%, 0 100%);
  padding: clamp(56px, 8vw, 104px) 0 clamp(54px, 8vw, 96px);
  margin-top: clamp(10px, 2vw, 22px);
}

.page-about .timeline-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.5vw, 56px);
}

.page-about .timeline-index-title {
  margin: 0 0 10px;
  color: var(--text-muted);
}

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

.page-about .timeline-index-list a {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--mist);
  border-radius: 999px;
  background: var(--warm);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--grape);
  text-decoration: none;
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .timeline-index-list a:hover,
.page-about .timeline-index-list a:focus-visible {
  background: var(--grape);
  border-color: var(--grape);
  color: var(--warm);
}

.page-about .timeline-body {
  border-left: 1px solid var(--mist);
  padding-left: clamp(18px, 2.4vw, 30px);
}

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

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: calc(clamp(18px, 2.4vw, 30px) * -1 - 5px);
  top: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--lilac);
}

.page-about .tl-node > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 8px 0;
  transition: color 160ms var(--ease);
}

.page-about .tl-node > summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  font-weight: 600;
  color: var(--grape);
  letter-spacing: -0.02em;
}

.page-about .tl-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.4;
  color: var(--grape-deep);
}

.page-about .tl-toggle {
  margin-left: auto;
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
  align-self: center;
}

.page-about .tl-toggle::before,
.page-about .tl-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 14px;
  height: 1.5px;
  background: var(--grape);
  transform: translateY(-50%);
}

.page-about .tl-toggle::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform 200ms var(--ease);
}

.page-about .tl-node[open] .tl-toggle::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-about .tl-detail {
  padding: 6px 0 4px;
}

.page-about .tl-detail p {
  margin: 0 0 12px;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 54ch;
}

.page-about .tl-figure {
  margin: 8px 0 26px;
}

.page-about .tl-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-board);
}

.page-about .tl-figure figcaption {
  margin-top: 10px;
  color: var(--text-muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-pad-y) 0;
}

.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.5vw, 44px);
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-board);
}

.page-about .team-caption {
  margin: 12px 0 0;
  color: var(--text-muted);
}

.page-about .team-panel {
  background: var(--surface);
  border: 1px solid var(--mist);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .team-panel[open] {
  border-color: var(--green-vein);
  box-shadow: var(--shadow-board);
}

.page-about .team-panel > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--grape-deep);
}

.page-about .team-panel > summary::-webkit-details-marker {
  display: none;
}

.page-about .team-count {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--green-vein);
  background: rgba(168, 213, 162, 0.32);
  border-radius: 999px;
  padding: 3px 10px;
}

.page-about .team-panel p {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text-muted);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  background: var(--lilac);
  clip-path: polygon(0 0, 100% 30px, 100% 100%, 0 100%);
  padding: clamp(54px, 8vw, 100px) 0 clamp(50px, 7vw, 92px);
}

.page-about .eco-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.5vw, 44px);
}

.page-about .eco-types {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .eco-type {
  background: var(--warm);
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  padding: clamp(18px, 2.6vw, 26px);
}

.page-about .eco-type-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--grape-deep);
  margin: 0 0 8px;
}

.page-about .eco-type p {
  margin: 0 0 14px;
  font-size: 0.93rem;
  line-height: 1.76;
  color: var(--text-muted);
}

.page-about .eco-cert {
  background: var(--grape-deep);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 30px);
  color: var(--text-on-dark);
  align-self: start;
}

.page-about .eco-cert-label {
  margin: 0 0 14px;
  color: var(--green);
  letter-spacing: 0.14em;
}

.page-about .eco-cert-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}

.page-about .eco-cert-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(201, 184, 218, 0.28);
}

.page-about .eco-cert-list li:last-child {
  border-bottom: none;
}

.page-about .eco-cert-key {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-on-dark-soft);
}

.page-about .eco-cert-val {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--warm);
}

.page-about .eco-cert-link {
  color: var(--green);
}

/* ---------- 月度机制 ---------- */
.page-about .about-rhythm {
  background: var(--grape-deep);
  clip-path: polygon(0 0, 100% 36px, 100% 100%, 0 100%);
  padding: clamp(62px, 9vw, 112px) 0 clamp(46px, 7vw, 84px);
}

.page-about .rhythm-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .rhythm-item {
  border: 1px solid rgba(201, 184, 218, 0.26);
  border-radius: var(--radius);
  padding: clamp(18px, 2.6vw, 26px);
  background: rgba(251, 248, 243, 0.03);
}

.page-about .rhythm-no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--green);
  margin-bottom: 8px;
}

.page-about .rhythm-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--warm);
  margin: 0 0 10px;
}

.page-about .rhythm-item p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--text-on-dark-soft);
}

.page-about .rhythm-note {
  margin-top: clamp(26px, 4vw, 38px);
  border-top: 1px solid rgba(201, 184, 218, 0.26);
  padding-top: clamp(22px, 3vw, 30px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.page-about .rhythm-note p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text-on-dark);
  max-width: 56ch;
}

.page-about .rhythm-cta {
  justify-self: start;
  border-color: var(--green);
  color: var(--warm);
}

/* ---------- 结尾 ---------- */
.page-about .about-close {
  padding: clamp(44px, 6vw, 78px) 0 clamp(48px, 7vw, 84px);
}

.page-about .about-close-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  align-items: center;
  border-top: 3px solid var(--green);
  padding-top: clamp(24px, 3.4vw, 36px);
}

.page-about .about-stamp {
  margin: 0 0 12px;
  color: var(--green-vein);
}

.page-about .about-close-lede {
  margin: 12px 0 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text-muted);
  max-width: 56ch;
}

.page-about .about-close-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .eco-type:first-child {
    grid-column: span 2;
  }

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

  .page-about .rhythm-note {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }

  .page-about .about-voice-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-voice-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

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

  .page-about .timeline-layout {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-about .timeline-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .timeline-index-list {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: clamp(30px, 4vw, 56px);
    align-items: start;
  }

  .page-about .eco-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(26px, 3.5vw, 48px);
    align-items: start;
  }

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

  .page-about .about-close-inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-about .about-close-actions {
    flex-wrap: nowrap;
    justify-content: flex-end;
  }
}

@media (min-width: 1100px) {
  .page-about .eco-types {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .eco-type:first-child {
    grid-column: span 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .principle,
  .page-about .principle:nth-child(2),
  .page-about .principle:nth-child(3) {
    transform: none;
  }

  .page-about .timeline-index-list a,
  .page-about .team-panel,
  .page-about .tl-toggle::after {
    transition: none;
  }
}
<<<END>>>