.page-about {
  --about-rail: 210px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .crumbs {
  padding: 18px 0 0;
  font-size: 13px;
}

.page-about .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--slate-blue);
}

.page-about .crumbs__list li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--paper-line);
}

.page-about .crumbs__link {
  color: var(--slate-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .crumbs__link:hover,
.page-about .crumbs__link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--gold);
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  margin-top: 18px;
  background: var(--ink);
  background-image: radial-gradient(circle at 86% 4%, rgba(200, 162, 74, 0.18), transparent 48%);
  color: var(--paper);
  border-top: 3px solid var(--gold);
}

.page-about .about-hero__inner {
  display: grid;
  gap: 30px;
  padding-top: 38px;
  padding-bottom: 46px;
}

.page-about .about-eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(27px, 5vw, 44px);
  line-height: 1.24;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 241, 230, 0.76);
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__plate {
  padding: 20px;
  border: 1px solid rgba(200, 162, 74, 0.45);
  border-radius: var(--radius);
  background: rgba(247, 241, 230, 0.06);
}

.page-about .about-hero__plate-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

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

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(247, 241, 230, 0.18);
}

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

.page-about .about-facts dt {
  font-size: 13px;
  color: rgba(247, 241, 230, 0.66);
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 15px;
  color: var(--gold-soft);
}

/* ---------- 通用章节头 ---------- */

.page-about .about-head {
  display: grid;
  gap: 10px;
  margin-bottom: 26px;
}

.page-about .about-head__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 4.2vw, 32px);
  line-height: 1.3;
}

.page-about .about-head__lead {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-blue);
}

/* ---------- 图片 ---------- */

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

.page-about .about-fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--paper-line);
  background: var(--paper-line);
}

.page-about .about-fig figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate-blue);
}

.page-about .about-fig--wide {
  margin-bottom: 30px;
}

/* ---------- 里程碑 ---------- */

.page-about .about-track {
  padding: 54px 0 24px;
}

.page-about .about-track__body {
  display: grid;
  gap: 26px;
}

.page-about .about-index__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--slate-blue);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
}

.page-about .about-index__link {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
  padding: 8px 12px;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--slate-blue);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--ease), border-color var(--ease), background var(--ease), transform var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--ink);
  border-color: var(--gold);
  transform: translateY(-2px);
}

.page-about .about-index__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--brown);
}

.page-about .about-panels {
  display: grid;
  gap: 16px;
}

.page-about .about-panel {
  padding: 20px 20px 22px;
  border: 1px solid var(--paper-line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-soft);
  transition: transform var(--ease), box-shadow var(--ease);
}

.page-about .about-panel:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-panel__no {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 10px;
  border: 1px solid rgba(200, 162, 74, 0.7);
  border-radius: 3px;
  background: var(--gold-soft);
  color: var(--brown);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-about .about-panel__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 19px;
  line-height: 1.45;
}

.page-about .about-panel__text {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate-blue);
}

.page-about .about-panel__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate-blue);
}

.page-about .about-panel--ink {
  background: var(--ink);
  border-color: var(--brown);
  border-left-color: var(--cinnabar);
  color: var(--paper);
}

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

.page-about .about-panel--ink .about-panel__text {
  color: rgba(247, 241, 230, 0.76);
}

.page-about .about-panel--ink .about-panel__no {
  background: rgba(200, 162, 74, 0.16);
  border-color: rgba(200, 162, 74, 0.5);
  color: var(--gold-soft);
}

.page-about .about-panel--ink .about-panel__meta {
  color: rgba(247, 241, 230, 0.62);
}

/* ---------- 档案流程 ---------- */

.page-about .about-flow {
  padding: 52px 0;
}

.page-about .about-steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.page-about .about-step {
  padding: 20px;
  border: 1px solid var(--paper-line);
  border-radius: var(--radius);
  background: var(--card);
}

.page-about .about-step__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-step__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
}

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

.page-about .about-rule {
  margin-top: 22px;
  padding: 22px;
  border: 1px dashed rgba(200, 162, 74, 0.55);
  border-radius: var(--radius);
  background: rgba(200, 162, 74, 0.07);
}

.page-about .about-rule__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--brown);
}

.page-about .about-rule__code {
  margin: 10px 0;
  font-family: var(--font-mono);
  font-size: clamp(16px, 3.6vw, 22px);
  letter-spacing: 0.1em;
  color: var(--ink);
}

.page-about .about-rule__note {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-blue);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: 52px 0;
}

.page-about .about-team__body {
  display: grid;
  gap: 26px;
}

.page-about .about-crews {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crew {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border: 1px solid var(--paper-line);
  border-left: 3px solid var(--jade);
  border-radius: var(--radius);
  background: var(--card);
}

.page-about .about-crew__seal {
  display: inline-block;
  padding: 3px 7px;
  border: 1px solid rgba(46, 110, 98, 0.5);
  border-radius: 3px;
  color: var(--jade);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-crew__name {
  margin: 0 0 5px;
  font-family: var(--font-head);
  font-size: 16px;
}

.page-about .about-crew__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-blue);
}

.page-about .about-cadence {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 18px;
}

.page-about .about-chip {
  padding: 6px 12px;
  border: 1px solid rgba(200, 162, 74, 0.5);
  border-radius: 3px;
  background: var(--gold-soft);
  color: var(--brown);
  font-size: 13px;
  line-height: 1.5;
}

.page-about .about-team__note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--paper-line);
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate-blue);
}

/* ---------- 数据与安全 ---------- */

.page-about .about-trust {
  padding: 52px 0;
  background: linear-gradient(180deg, rgba(229, 223, 211, 0.5), rgba(247, 241, 230, 0));
}

.page-about .about-seals {
  display: grid;
  gap: 16px;
}

.page-about .about-seal {
  position: relative;
  padding: 22px 18px 20px;
  border: 1px solid var(--paper-line);
  border-top: 2px solid var(--jade);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-soft);
}

.page-about .about-seal::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(46, 110, 98, 0.2);
  border-radius: 3px;
  pointer-events: none;
}

.page-about .about-seal__mark {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--jade);
}

.page-about .about-seal__text {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-blue);
}

/* ---------- 合作与荣誉 ---------- */

.page-about .about-eco {
  padding: 52px 0;
}

.page-about .about-eco__inner {
  display: grid;
  gap: 26px;
}

.page-about .about-eco__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--slate-blue);
}

.page-about .about-eco__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-stat {
  padding: 16px 16px 18px;
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 4vw, 26px);
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .about-stat__label {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(247, 241, 230, 0.72);
}

.page-about .about-eco__cta {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate-blue);
}

.page-about .about-eco__cta .ghost-link {
  margin-left: 6px;
}

/* ---------- 内容规模 ---------- */

.page-about .about-scale {
  padding: 52px 0 56px;
  background: var(--brown);
  color: var(--paper);
}

.page-about .about-eyebrow--light {
  color: var(--gold-soft);
}

.page-about .about-scale__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 4.2vw, 30px);
  line-height: 1.32;
  color: var(--paper);
}

.page-about .about-scale__lead {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 241, 230, 0.74);
}

.page-about .about-scale__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  border: 1px solid rgba(247, 241, 230, 0.16);
  border-radius: var(--radius);
  background: rgba(247, 241, 230, 0.16);
  overflow: hidden;
}

.page-about .about-scale__item {
  padding: 18px 16px 20px;
  background: var(--brown);
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 4.2vw, 25px);
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .about-scale__label {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(247, 241, 230, 0.72);
}

.page-about .about-scale__note {
  margin: 22px 0 0;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(247, 241, 230, 0.7);
}

/* ---------- 结尾入口 ---------- */

.page-about .about-cta {
  padding: 52px 0 64px;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 20px;
  padding: 26px 22px 28px;
  border: 1px solid var(--paper-line);
  border-top: 3px solid var(--gold);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-soft);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(20px, 3.6vw, 26px);
  line-height: 1.4;
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate-blue);
}

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

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .about-hero__inner {
    padding-top: 48px;
    padding-bottom: 56px;
  }

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

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

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

  .page-about .about-cta__inner {
    padding: 32px 30px 34px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(280px, 4fr);
    gap: 46px;
    align-items: end;
    padding-top: 60px;
    padding-bottom: 68px;
  }

  .page-about .about-team__body {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-eco__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

@media (min-width: 960px) {
  .page-about .about-track__body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 104px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    border: 0;
    border-bottom: 1px dashed var(--paper-line);
    border-radius: 0;
    background: transparent;
    padding: 12px 4px;
    white-space: normal;
    transition: color var(--ease), border-color var(--ease), padding-left var(--ease);
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    transform: none;
    padding-left: 12px;
    border-bottom-color: var(--gold);
    color: var(--ink);
  }

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

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

  .page-about .about-scale__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-panels {
    gap: 20px;
  }

  .page-about .about-panel:nth-of-type(even) {
    margin-left: 44px;
  }

  .page-about .about-panel:nth-of-type(odd) {
    margin-right: 22px;
  }
}