.page-about {
  --ab-shadow: 0 18px 44px rgba(7, 22, 18, 0.52);
  --ab-shadow-soft: 0 8px 22px rgba(7, 22, 18, 0.36);
  padding-bottom: clamp(48px, 8vw, 92px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(16px, 2.4vw, 26px);
}

/* ---------- 首屏分屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: center;
  padding-top: clamp(24px, 4vw, 46px);
}

.page-about .about-hero__eyebrow {
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(28px, 5.6vw, 52px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--cream);
  margin: 0 0 18px;
}

.page-about .about-hero__lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(243, 237, 226, 0.78);
  margin: 0 0 22px;
  max-width: 54ch;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  padding: 10px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  transform: rotate(-0.7deg);
  box-shadow: var(--ab-shadow);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: -8px -8px 8px 8px;
  border: 1px solid var(--line-soft);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.04);
}

.page-about .about-hero__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--slate);
}

/* ---------- 数据带 ---------- */
.page-about .about-stats {
  margin-top: clamp(40px, 6vw, 74px);
}

.page-about .about-stats__list {
  list-style: none;
  margin: 0;
  padding: 22px 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 16px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-stats__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stats__num {
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 500;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-about .about-stats__unit {
  font-size: 0.46em;
  margin-left: 3px;
  color: var(--gold-dark);
}

.page-about .about-stats__key {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  margin-top: clamp(46px, 7vw, 86px);
}

.page-about .about-origin__body {
  margin-top: 26px;
  display: grid;
  gap: 18px;
}

.page-about .about-origin__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.86;
  color: rgba(243, 237, 226, 0.8);
}

.page-about .about-origin__aside {
  margin-top: 26px;
  padding: 20px 22px;
  background: linear-gradient(150deg, rgba(29, 75, 64, 0.86), rgba(20, 60, 51, 0.94));
  border-left: 3px solid var(--gold);
  box-shadow: var(--ab-shadow-soft);
}

.page-about .about-origin__aside-k {
  margin: 0 0 6px;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-origin__aside-v {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.5;
  color: var(--cream);
}

.page-about .about-origin__aside-note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(243, 237, 226, 0.68);
}

.page-about .about-origin__aside-note a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  margin-top: clamp(46px, 7vw, 86px);
  scroll-margin-top: 120px;
}

.page-about .about-timeline__lead {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.86;
  color: rgba(243, 237, 226, 0.78);
}

.page-about .about-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 24px;
}

.page-about .filter-chip {
  font-family: var(--font-body);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  padding: 7px 15px;
  color: var(--slate);
  background: transparent;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.28s var(--ease), border-color 0.28s var(--ease), background-color 0.28s var(--ease);
}

.page-about .filter-chip:hover {
  color: var(--cream);
  border-color: var(--gold-dark);
}

.page-about .filter-chip.is-active {
  color: var(--ink-900);
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--gold-dark) 42%, rgba(200, 161, 90, 0.1) 100%);
}

.page-about .about-node {
  position: relative;
  padding-left: 30px;
  padding-bottom: 32px;
}

.page-about .about-node:last-child {
  padding-bottom: 6px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink-800);
  border: 1px solid var(--gold);
  box-shadow: 0 0 0 4px var(--ink-800);
}

.page-about .about-node__stamp {
  display: inline-block;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-900);
  background: var(--gold);
  padding: 3px 10px;
  transform: rotate(-2deg);
}

.page-about .about-node__body {
  margin-top: 12px;
  padding: 18px 18px 16px;
  background: rgba(29, 75, 64, 0.5);
  border: 1px solid var(--line-soft);
  transition: border-color 0.35s var(--ease), transform 0.35s var(--ease);
}

.page-about .about-node:hover .about-node__body {
  border-color: var(--gold-dark);
  transform: translateX(3px);
}

.page-about .about-node__meta {
  margin: 0 0 7px;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-about .about-node__title {
  margin: 0 0 9px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--cream);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(243, 237, 226, 0.72);
}

.page-about .about-node.is-hidden {
  display: none;
}

.page-about .about-timeline__figure {
  margin: 34px 0 0;
  padding: 10px;
  background: var(--ink-700);
  border: 1px solid var(--line);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.03);
}

.page-about .about-timeline__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin-top: clamp(46px, 7vw, 86px);
}

.page-about .about-team__lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.86;
  color: rgba(243, 237, 226, 0.78);
}

.page-about .about-team__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(238px, 80%);
  gap: 14px;
  margin-top: 28px;
  padding: 4px 2px 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .tcard {
  scroll-snap-align: start;
  position: relative;
  padding: 22px 18px 16px;
  background: linear-gradient(158deg, rgba(29, 75, 64, 0.92), rgba(20, 60, 51, 0.98));
  border: 1px solid var(--line-soft);
  box-shadow: var(--ab-shadow-soft);
  outline: none;
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}

.page-about .tcard:hover,
.page-about .tcard:focus-visible {
  transform: translateY(-6px);
  border-color: var(--gold);
}

.page-about .tcard__num {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 500;
  line-height: 1;
  color: var(--gold);
  display: block;
  margin-bottom: 12px;
}

.page-about .tcard__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--cream);
}

.page-about .tcard__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(243, 237, 226, 0.74);
}

.page-about .tcard__more {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--slate);
  transition: max-height 0.42s var(--ease), opacity 0.32s var(--ease), margin-top 0.42s var(--ease);
}

.page-about .tcard:hover .tcard__more,
.page-about .tcard:focus-visible .tcard__more {
  max-height: 180px;
  opacity: 1;
  margin-top: 12px;
}

.page-about .about-criteria {
  margin-top: 34px;
  padding: 26px 20px 22px;
  background: var(--paper);
  border: 1px solid var(--line);
  color: var(--ink-800);
}

.page-about .about-criteria__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 600;
  color: var(--ink-800);
}

.page-about .about-criteria__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-criteria__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ink-700);
}

.page-about .about-criteria__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--amber);
  transform: rotate(45deg);
}

.page-about .about-criteria__list strong {
  color: var(--ink-900);
  font-weight: 700;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partners {
  margin-top: clamp(46px, 7vw, 86px);
}

.page-about .about-partners__grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .about-partners__figure {
  margin: 0;
  padding: 9px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  transform: rotate(0.5deg);
}

.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.03);
}

.page-about .about-partners__body p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.86;
  color: rgba(243, 237, 226, 0.78);
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--line-soft);
  padding-top: 16px;
}

.page-about .about-partners__list li {
  font-size: 14px;
  line-height: 1.78;
  color: rgba(243, 237, 226, 0.72);
}

.page-about .about-partners__k {
  display: inline-block;
  min-width: 70px;
  margin-right: 10px;
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

/* ---------- 面向未来 ---------- */
.page-about .about-forward {
  margin-top: clamp(48px, 7vw, 88px);
}

.page-about .about-forward__inner {
  padding: clamp(24px, 4vw, 42px) clamp(18px, 3.4vw, 40px);
  background: linear-gradient(165deg, rgba(29, 75, 64, 0.9), rgba(14, 42, 36, 0.96));
  border: 1px solid var(--line);
  box-shadow: var(--ab-shadow);
}

.page-about .about-forward__lead {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.86;
  color: rgba(243, 237, 226, 0.78);
}

.page-about .about-forward__steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-forward__steps li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 14px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .about-forward__steps li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-forward__step-n {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.3;
  color: var(--gold);
  border: 1px solid var(--gold-dark);
  text-align: center;
  padding: 3px 0;
}

.page-about .about-forward__steps h3 {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-forward__steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(243, 237, 226, 0.72);
}

.page-about .about-forward__links {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 700px) {
  .page-about .about-stats__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-origin__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 34px;
  }

  .page-about .about-origin__body p:first-child {
    grid-column: 1 / -1;
  }

  .page-about .about-criteria__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 24px;
  }

  .page-about .about-team__track {
    grid-auto-flow: row;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-columns: auto;
    overflow: visible;
    padding-bottom: 4px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: 32px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: 52px;
  }

  .page-about .about-origin__aside {
    margin-top: 30px;
    max-width: 520px;
  }

  .page-about .about-timeline__figure {
    max-width: 620px;
  }

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

@media (min-width: 1100px) {
  .page-about .timeline {
    padding-right: 60px;
  }

  .page-about .about-node {
    padding-left: 40px;
    padding-bottom: 38px;
  }

  .page-about .about-node::before {
    left: -5px;
    width: 11px;
    height: 11px;
  }

  .page-about .about-node__body {
    max-width: 760px;
    padding: 22px 26px 20px;
  }
}

@media (hover: none) {
  .page-about .tcard__more {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tcard,
  .page-about .about-node__body,
  .page-about .filter-chip,
  .page-about .tcard__more {
    transition: none;
  }

  .page-about .tcard:hover,
  .page-about .tcard:focus-visible,
  .page-about .about-node:hover .about-node__body {
    transform: none;
  }
}
</main>