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

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(18px, 3vw, 34px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.6vw, 4.3rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin: 12px 0 18px;
  max-width: 16em;
}

.page-about .about-hero__lede {
  font-size: clamp(16px, 1.05vw, 17.5px);
  line-height: 1.85;
  color: var(--text-soft);
  max-width: 34em;
  margin: 0;
}

.page-about .about-hero__meta {
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 2px solid var(--gold);
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--text-soft);
}

.page-about .about-hero__meta strong {
  font-family: var(--font-num);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

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

.page-about .about-hero__art .figure__frame {
  border-radius: var(--radius);
  overflow: hidden;
}

/* ---------- 章节跳转条 ---------- */
.page-about .about-jump {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-top: 1px solid rgba(22, 19, 15, 0.12);
  border-bottom: 1px solid rgba(22, 19, 15, 0.12);
}

.page-about .about-jump__inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 11px;
  padding-bottom: 11px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-jump__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-jump__caption {
  flex: none;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--stone);
  border-right: 1px solid rgba(22, 19, 15, 0.16);
  padding-right: 14px;
}

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

.page-about .about-jump__link {
  display: inline-block;
  flex: none;
  padding: 7px 14px;
  border: 1px solid rgba(22, 19, 15, 0.14);
  border-radius: 999px;
  font-size: 0.86rem;
  line-height: 1.2;
  color: var(--text-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-jump__link:hover {
  border-color: var(--gold);
  color: var(--ink);
}

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

/* ---------- 由来 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(22px, 3vw, 48px);
}

.page-about .about-origin__aside {
  border-left: 3px solid var(--gold);
  padding-left: 18px;
}

.page-about .about-origin__aside h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 10px 0 0;
}

.page-about .about-origin__body p {
  font-size: clamp(16px, 1.05vw, 17.5px);
  line-height: 1.85;
  color: var(--text-soft);
  max-width: 34em;
  margin: 0 0 1.1em;
}

.page-about .about-origin__body p:first-child {
  color: var(--ink);
  font-size: clamp(17px, 1.15vw, 19px);
}

/* ---------- 团队 ---------- */
.page-about .about-team__head,
.page-about .about-cert__head,
.page-about .about-history__head,
.page-about .about-eco__head {
  max-width: 46em;
}

.page-about .about-team__head h2,
.page-about .about-cert__head h2,
.page-about .about-history__head h2,
.page-about .about-eco__head h2,
.page-about .about-quality__intro h2,
.page-about .about-next h2 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  margin: 10px 0 14px;
}

.page-about .about-team__lede,
.page-about .about-cert__lede,
.page-about .about-history__lede,
.page-about .about-eco__lede {
  font-size: clamp(16px, 1.02vw, 17px);
  line-height: 1.85;
  color: var(--text-soft);
  margin: 0;
}

.page-about .about-roles {
  display: grid;
  gap: 18px;
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
}

.page-about .role {
  background: var(--paper);
  border-radius: var(--radius);
  border-top: 3px solid var(--gold);
  box-shadow: var(--shadow-1);
  padding: 20px 20px 22px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .role:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-about .role__idx {
  display: block;
  font-family: var(--font-num);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--gold-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .role__title {
  font-size: 1.12rem;
  font-weight: 800;
  line-height: 1.35;
  margin: 8px 0 8px;
}

.page-about .role__desc {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-soft);
  margin: 0;
}

/* ---------- 认证 ---------- */
.page-about .about-cert__figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-about .about-cert__figure .figure__frame {
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .cert-steps {
  display: grid;
  gap: 16px;
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
}

.page-about .cert-step {
  background: var(--paper-2);
  border-radius: var(--radius);
  border-top: 5px solid var(--gold);
  padding: 22px;
  display: flex;
  flex-direction: column;
}

.page-about .cert-step--s2 {
  border-top-color: var(--clay);
}

.page-about .cert-step--s3 {
  border-top-color: var(--cinnabar);
}

.page-about .cert-step__tag {
  font-family: var(--font-num);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--gold-deep);
}

.page-about .cert-step--s2 .cert-step__tag {
  color: var(--clay);
}

.page-about .cert-step--s3 .cert-step__tag {
  color: var(--cinnabar);
}

.page-about .cert-step__title {
  font-size: 1.14rem;
  font-weight: 800;
  line-height: 1.35;
  margin: 10px 0 10px;
}

.page-about .cert-step__desc {
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--text-soft);
  margin: 0;
}

.page-about .about-cert__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--celadon);
  background: rgba(110, 139, 116, 0.08);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--text-soft);
}

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

.page-about .about-history__figure .figure__frame {
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding: 4px 0 4px 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold), var(--gold-pale));
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 2px var(--paper-2), 0 0 0 2px var(--gold);
}

.page-about .tl-item--current::before {
  background: var(--ink);
  box-shadow: 0 0 0 2px var(--paper-2), 0 0 0 2px var(--ink);
}

.page-about .tl-item__ver {
  display: block;
  font-family: var(--font-num);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--gold-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .tl-item--current .tl-item__ver {
  color: var(--cinnabar);
}

.page-about .tl-item__title {
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1.4;
  margin: 6px 0 8px;
}

.page-about .tl-item__desc {
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text-soft);
  margin: 0;
  max-width: 38em;
}

.page-about .about-history__more {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(22, 19, 15, 0.12);
}

.page-about .link-more {
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 3px;
}

.page-about .link-more:hover {
  color: var(--gold-deep);
}

/* ---------- 质量控制 ---------- */
.page-about .about-quality__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-quality__intro p {
  font-size: clamp(16px, 1.02vw, 17px);
  line-height: 1.85;
  color: var(--text-soft);
  margin: 0;
  max-width: 34em;
}

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

.page-about .quality-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--paper-2);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--gold);
  padding: 16px 18px;
}

.page-about .quality-item__idx {
  flex: none;
  font-family: var(--font-num);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--gold-deep);
  padding-top: 3px;
  font-variant-numeric: tabular-nums;
}

.page-about .quality-item p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---------- 生态 ---------- */
.page-about .eco-body {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .eco-body__text p {
  font-size: clamp(16px, 1.02vw, 17px);
  line-height: 1.85;
  color: var(--text-soft);
  margin: 0 0 1.1em;
  max-width: 34em;
}

.page-about .eco-body__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .stat-cell {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}

.page-about .stat-cell__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 4.4vw, 2.7rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .stat-cell__label {
  display: block;
  margin-top: 9px;
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--text-soft);
}

/* ---------- 尾段入口 ---------- */
.page-about .about-next {
  border-top: 1px solid rgba(22, 19, 15, 0.12);
}

.page-about .about-next__lede {
  font-size: clamp(16px, 1.02vw, 17px);
  line-height: 1.85;
  color: var(--text-soft);
  margin: 0;
  max-width: 40em;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .cert-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: end;
  }

  .page-about .cert-step--s1 {
    min-height: 200px;
  }

  .page-about .cert-step--s2 {
    min-height: 240px;
  }

  .page-about .cert-step--s3 {
    min-height: 280px;
  }

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

@media (min-width: 860px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-quality__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .eco-body {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.88fr);
  }

  .page-about .about-hero__art {
    justify-self: end;
    width: 100%;
  }
}

@media (min-width: 1040px) {
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
<<<END>>>