.page-about {
  --about-space: clamp(56px, 9vw, 104px);
  --about-pad: clamp(22px, 4vw, 48px);
  --about-ink-soft: #4b5057;
}

.page-about .about-crumbs {
  padding-top: clamp(16px, 3vw, 26px);
}

.page-about .about-section {
  margin-top: var(--about-space);
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.page-about .about-kicker__num {
  font-size: 12px;
  letter-spacing: 0.12em;
  padding: 3px 7px;
  border: 1px solid var(--brass);
  color: var(--brass);
}

.page-about .about-kicker__label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--slate);
}

.page-about .about-section__title {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--snow);
  max-width: 20em;
}

.page-about .about-section__lede {
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
  max-width: 46em;
}

/* ---------- 01 品牌自述 ---------- */
.page-about .about-lede__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
}

.page-about .about-lede__paper {
  background: var(--paper);
  color: var(--ink-text);
  border: 1px solid var(--line-paper);
  border-radius: var(--radius);
  padding: var(--about-pad);
  box-shadow: inset 0 1px 0 rgba(201, 162, 39, 0.55), 0 24px 48px -40px rgba(0, 0, 0, 0.9);
}

.page-about .about-lede__paper .about-kicker__num {
  color: var(--ochre);
  border-color: var(--ochre);
}

.page-about .about-lede__paper .about-kicker__label {
  color: var(--about-ink-soft);
}

.page-about .about-lede__title {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-size: clamp(27px, 5.4vw, 48px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--ink-text);
}

.page-about .about-lede__lead {
  margin: 0 0 1.1em;
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.7;
  font-weight: 600;
  color: var(--ink-text);
}

.page-about .about-lede__text {
  margin: 0 0 1em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

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

.page-about .about-lede__figure {
  margin: 0;
}

/* ---------- 02 时间线 ---------- */
.page-about .about-history__figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(22px, 3.6vw, 36px);
  max-width: 78ch;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--brass), rgba(201, 162, 39, 0.1));
}

.page-about .timeline__item {
  position: relative;
  padding-left: 34px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--turquoise);
  border: 1px solid var(--turquoise-lit);
  box-shadow: 0 0 0 4px rgba(46, 140, 122, 0.16);
}

.page-about .timeline__year {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--brass);
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.4vw, 23px);
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--snow);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 03 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .team-card {
  background: var(--ink-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 10px;
  align-content: start;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-about .team-card:hover {
  transform: translateY(-6px);
  border-color: var(--brass);
  box-shadow: 0 20px 34px -26px rgba(0, 0, 0, 0.95);
}

.page-about .team-card__tag {
  justify-self: start;
  font-size: 11px;
  letter-spacing: 0.12em;
  padding: 4px 9px;
  background: var(--brass);
  color: var(--ink);
}

.page-about .team-card__num {
  margin: 0;
  font-size: clamp(30px, 4.4vw, 42px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--snow);
}

.page-about .team-card__title {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--snow);
}

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

.page-about .team-card__note {
  margin: 4px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(154, 167, 180, 0.62);
  transition: color 0.22s ease;
}

.page-about .team-card:hover .team-card__note {
  color: var(--turquoise-lit);
}

/* ---------- 04 四步流程 ---------- */
.page-about .about-paper {
  position: relative;
  background: var(--paper);
  color: var(--ink-text);
  border: 1px solid var(--line-paper);
  border-radius: var(--radius);
  padding: var(--about-pad);
  box-shadow: inset 0 1px 0 rgba(201, 162, 39, 0.55);
}

.page-about .about-paper .about-kicker__num {
  color: var(--ochre);
  border-color: var(--ochre);
}

.page-about .about-paper .about-kicker__label {
  color: var(--about-ink-soft);
}

.page-about .about-paper .about-section__title {
  color: var(--ink-text);
}

.page-about .about-paper .about-section__lede {
  color: var(--about-ink-soft);
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 2px solid rgba(20, 24, 30, 0.16);
  padding-top: 14px;
}

.page-about .flow__details {
  background: rgba(20, 24, 30, 0.035);
  border: 1px solid var(--line-paper);
  border-radius: var(--radius);
}

.page-about .flow__details[open] {
  border-color: var(--ochre);
  background: rgba(178, 74, 46, 0.06);
}

.page-about .flow__summary {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .flow__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ochre);
}

.page-about .flow__details[open] .flow__summary::after {
  content: "–";
}

.page-about .flow__num {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ochre);
}

.page-about .flow__label {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink-text);
}

.page-about .flow__hint {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--about-ink-soft);
}

.page-about .flow__text {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* ---------- 05 服务区域 ---------- */
.page-about .region-grid {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  align-items: start;
}

.page-about .factlist {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .factlist li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .factlist__k {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-about .factlist__v {
  font-size: 14px;
  font-weight: 600;
  color: var(--snow);
  text-align: right;
}

.page-about .region-body p {
  margin: 0 0 1.1em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .about-region__figure {
  margin: clamp(16px, 3vw, 28px) 0 0;
}

/* ---------- 06 合作生态 ---------- */
.page-about .tagwall {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .tagwall__item {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  line-height: 1.5;
  padding: 8px 13px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--snow);
  overflow-wrap: anywhere;
}

.page-about .tagwall__item:nth-child(3n + 1) {
  background: var(--ochre);
  border-color: rgba(245, 242, 234, 0.18);
}

.page-about .tagwall__item:nth-child(3n + 2) {
  background: var(--night);
  border-color: var(--line);
}

.page-about .tagwall__item:nth-child(3n + 3) {
  background: transparent;
  border-color: var(--turquoise);
  color: var(--turquoise-lit);
}

.page-about .eco-notes {
  max-width: 62ch;
}

.page-about .eco-notes p {
  margin: 0 0 1em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .eco-notes__legal {
  font-size: 13px;
  color: rgba(154, 167, 180, 0.8);
}

/* ---------- 收尾行动区 ---------- */
.page-about .about-cta {
  margin-top: var(--about-space);
  background: var(--ochre);
  color: var(--snow);
  padding: clamp(30px, 5vw, 58px) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  align-items: center;
}

.page-about .about-cta__eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(245, 242, 234, 0.78);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-about .about-cta__copy {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(245, 242, 234, 0.9);
  max-width: 44em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta__btn {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid rgba(245, 242, 234, 0.62);
  border-radius: var(--radius);
  color: var(--snow);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-cta__btn:hover,
.page-about .about-cta__btn:focus-visible {
  background: var(--snow);
  color: var(--ochre);
  border-color: var(--snow);
}

.page-about .about-cta__btn--solid {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--snow);
}

.page-about .about-cta__btn--solid:hover,
.page-about .about-cta__btn--solid:focus-visible {
  background: var(--ink-deep);
  color: var(--snow);
  border-color: var(--brass);
}

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 16px;
  }
}

@media (min-width: 820px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .team-card:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .team-card:nth-child(3) {
    margin-top: 68px;
  }
}

@media (min-width: 900px) {
  .page-about .about-lede__grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.78fr);
  }

  .page-about .about-lede__figure {
    margin-top: 46px;
  }

  .page-about .region-grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  }

  .page-about .factlist li {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .page-about .factlist__v {
    text-align: left;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .team-card__note,
  .page-about .about-cta__btn {
    transition: none;
  }

  .page-about .team-card:hover {
    transform: none;
  }
}