.page-about {
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(28px, 5vw, 64px);
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: end;
}

.page-about .hero-title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(40px, 8.6vw, 90px);
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 14px 0 22px;
  max-width: 13ch;
}

.page-about .hero-lede {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 54ch;
  margin: 0 0 26px;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

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

.page-about .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  box-shadow: 8px 8px 0 var(--paper-2);
  object-fit: cover;
}

.page-about .hero-figure .figure-note {
  margin-top: 14px;
}

/* ---------- 通用小标题 ---------- */
.page-about .about-intro {
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding-left: 16px;
  border-left: 3px solid var(--turf);
}

/* ---------- 流程 ---------- */
.page-about .process-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .process-step {
  background: var(--chalk);
  padding: 26px 22px 30px;
  transition: background 160ms ease-out;
}

.page-about .process-step:hover {
  background: var(--paper);
}

.page-about .process-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-style: italic;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--turf);
  margin-bottom: 12px;
}

.page-about .process-step__title {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.15;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .process-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .flow-figure {
  margin: clamp(32px, 5vw, 56px) 0 0;
  max-width: 900px;
}

.page-about .flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  object-fit: cover;
}

.page-about .flow-figure .figure-note {
  margin-top: 12px;
}

/* ---------- 团队 ---------- */
.page-about .team-stairs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .team-card {
  position: relative;
  background: var(--chalk);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--turf);
  padding: 26px 22px 24px;
  box-shadow: 5px 5px 0 var(--paper-2);
  transition: transform 140ms ease-out, border-color 140ms ease-out;
}

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

.page-about .team-card__count {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(48px, 9vw, 72px);
  font-style: italic;
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: var(--ink);
  margin-bottom: 6px;
}

.page-about .team-card__role {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.1;
  color: var(--turf-deep);
  margin: 0 0 12px;
}

.page-about .team-card p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .team-card__duty {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  opacity: 0.75;
  margin: 0;
}

.page-about .team-note {
  margin: clamp(28px, 4vw, 44px) 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  padding: 18px 20px;
  background: var(--paper-2);
  border-left: 3px solid var(--whistle);
}

/* ---------- 时间线（深色区） ---------- */
.page-about .about-timeline {
  background: var(--turf-dark);
  color: var(--paper);
  padding-top: clamp(56px, 8vw, 104px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .about-timeline .section-head__num,
.page-about .about-timeline .section-head__title {
  color: var(--paper);
}

.page-about .about-timeline .about-intro {
  color: var(--paper);
  opacity: 0.86;
  border-left-color: var(--whistle);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  border-left: 1px solid rgba(245, 240, 230, 0.3);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: 18px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 18px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--turf);
  border: 2px solid var(--whistle);
  box-sizing: content-box;
}

.page-about .about-timeline .fold__head {
  width: 100%;
  display: flex;
  align-items: baseline;
  gap: 14px;
  text-align: left;
  background: rgba(253, 252, 248, 0.06);
  color: var(--paper);
  border: 1px solid rgba(245, 240, 230, 0.22);
  padding: 14px 16px;
  cursor: pointer;
  transition: background 140ms ease-out, border-color 140ms ease-out;
}

.page-about .about-timeline .fold__head:hover {
  background: rgba(253, 252, 248, 0.12);
  border-color: var(--whistle);
}

.page-about .about-timeline .fold__index {
  font-family: var(--font-mono);
  font-size: 20px;
  font-style: italic;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--whistle);
  flex: 0 0 auto;
}

.page-about .about-timeline .fold__title {
  flex: 1 1 auto;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-timeline .fold__sign {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--whistle);
}

.page-about .about-timeline .fold__body {
  padding: 16px 16px 4px;
  border: 1px solid rgba(245, 240, 230, 0.22);
  border-top: 0;
}

.page-about .about-timeline .fold__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.9;
  max-width: 62ch;
}

/* ---------- 合作生态 ---------- */
.page-about .partner-groups {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .partner-group {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 24px 22px 26px;
}

.page-about .partner-group__title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--rule);
}

.page-about .partner-group__count {
  font-family: var(--font-mono);
  font-size: 26px;
  font-style: italic;
  font-weight: 700;
  color: var(--turf);
  letter-spacing: 0.02em;
}

.page-about .partner-group p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .partner-cloud {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .partner-figure {
  margin: clamp(32px, 5vw, 56px) 0 0;
}

.page-about .partner-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--rule);
  object-fit: cover;
}

.page-about .partner-figure .figure-note {
  margin-top: 12px;
}

/* ---------- 认可 ---------- */
.page-about .recognition-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  background: var(--ink-2);
  color: var(--paper);
  padding: clamp(26px, 4vw, 40px);
  border-left: 6px solid var(--turf);
}

.page-about .recognition-band__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(72px, 14vw, 128px);
  font-style: italic;
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: 0.02em;
  color: var(--whistle);
}

.page-about .recognition-band__label {
  margin: 10px 0 0;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .recognition-band__side p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.88;
  max-width: 46ch;
}

.page-about .recognition-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .recognition-card {
  padding: 22px 20px 24px;
  background: var(--chalk);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--whistle);
}

.page-about .recognition-card h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.15;
  color: var(--ink);
  margin: 12px 0 10px;
}

.page-about .recognition-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-2);
}

/* ---------- 合作入口 ---------- */
.page-about .coop-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .coop-card {
  background: var(--paper);
  padding: 26px 22px 28px;
  transition: background 140ms ease-out;
}

.page-about .coop-card:hover {
  background: var(--chalk);
}

.page-about .coop-card h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.12;
  color: var(--ink);
  margin: 12px 0 10px;
}

.page-about .coop-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .coop-action {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(22px, 3vw, 32px);
  background: var(--turf-dark);
  color: var(--paper);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .coop-action__text {
  flex: 1 1 320px;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
}

.page-about .coop-hint {
  margin: 20px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .coop-hint a {
  color: var(--turf-deep);
  text-decoration: underline;
  text-decoration-color: var(--whistle);
  text-underline-offset: 3px;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

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

  .page-about .team-stairs {
    gap: 24px;
  }

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

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: clamp(48px, 6vw, 88px);
  }

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

  .page-about .team-card:nth-child(1) {
    margin-right: 22%;
  }

  .page-about .team-card:nth-child(2) {
    margin-left: 11%;
    margin-right: 11%;
  }

  .page-about .team-card:nth-child(3) {
    margin-left: 22%;
  }

  .page-about .recognition-band {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: center;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .recognition-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
<<<END>>>