.page-about {
  --about-pad: clamp(48px, 8vw, 108px);
  --about-rule: 1px solid rgba(212, 166, 74, .22);
  --about-line: 1px solid rgba(28, 53, 84, .95);
  --about-text: rgba(245, 239, 226, .8);
  background: var(--c-ink);
  color: var(--c-ivory);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: clamp(16px, 2.4vw, 26px);
}

.page-about .about-crumb .breadcrumb {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-mist);
}

.page-about .about-crumb .breadcrumb a {
  color: var(--c-mist);
  text-decoration: none;
}

.page-about .about-crumb .breadcrumb a:hover {
  color: var(--c-gold-soft);
}

.page-about .about-crumb .breadcrumb__sep {
  color: rgba(212, 166, 74, .55);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: clamp(26px, 4vw, 52px) 0 clamp(36px, 5.5vw, 74px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: var(--about-line);
}

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

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(198deg, rgba(10, 21, 36, 0) 44%, rgba(10, 21, 36, .78) 100%);
  pointer-events: none;
}

.page-about .about-hero__cap {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 13px;
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(245, 239, 226, .78);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(36px, 8vw, 80px);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--c-ivory);
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--c-gold-soft);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--about-text);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(28, 53, 84, .9);
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
}

.page-about .about-stats__item {
  background: var(--c-ink);
  padding: 16px 12px 18px;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1;
  color: var(--c-gold);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 9px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-mist);
}

/* ---------- 章节导航条 ---------- */

.page-about .about-chapters {
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
  background: var(--c-ink-deep);
}

.page-about .about-chapters__inner {
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-chapters__link {
  flex: 0 0 auto;
  padding: 15px 16px;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--c-mist);
  text-decoration: none;
  white-space: nowrap;
  border-right: var(--about-line);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-chapters__link:first-child {
  border-left: var(--about-line);
}

.page-about .about-chapters__link:hover,
.page-about .about-chapters__link:focus-visible {
  color: var(--c-gold-soft);
  background: rgba(16, 35, 63, .8);
}

/* ---------- 章节通用 ---------- */

.page-about .about-sec {
  padding: var(--about-pad) 0;
  border-bottom: var(--about-line);
}

.page-about .about-sec__inner {
  display: grid;
  gap: clamp(22px, 3.6vw, 48px);
}

.page-about .about-num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(38px, 6.4vw, 66px);
  line-height: 1;
  color: var(--c-gold);
  letter-spacing: .02em;
}

.page-about .about-sec__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(25px, 3.8vw, 42px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--c-ivory);
}

.page-about .about-sec__body p {
  margin: 0 0 1.05em;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.92;
  color: var(--about-text);
}

.page-about .about-sec__body p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-quote {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--c-gold);
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.6;
  color: var(--c-gold-soft);
}

.page-about .about-head {
  margin-bottom: clamp(26px, 3.6vw, 44px);
}

.page-about .about-head__lead {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--about-text);
}

/* ---------- 四大板块 ---------- */

.page-about .pillars {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .pillar {
  padding: clamp(20px, 3vw, 26px) clamp(18px, 2.6vw, 24px) clamp(22px, 3vw, 28px);
  background: var(--c-veil);
  border: var(--about-line);
  border-top: 2px solid rgba(212, 166, 74, .75);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .pillar:hover {
  border-top-color: var(--c-cinnabar);
}

.page-about .pillar__mark {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1;
  color: rgba(212, 166, 74, .6);
}

.page-about .pillar__title {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: .01em;
  color: var(--c-ivory);
}

.page-about .pillar__text {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-text);
}

.page-about .pillar__link {
  display: inline-block;
  padding-bottom: 3px;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--c-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 166, 74, .42);
}

.page-about .pillar__link:hover,
.page-about .pillar__link:focus-visible {
  color: var(--c-gold-soft);
  border-bottom-color: var(--c-gold-soft);
}

/* ---------- 时间轴 ---------- */

.page-about .tl-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 2.6vw, 26px);
}

.page-about .tl-chip {
  font-family: var(--font-body);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--c-mist);
  background: transparent;
  border: var(--about-line);
  padding: 8px 14px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .tl-chip:hover,
.page-about .tl-chip:focus-visible {
  color: var(--c-gold-soft);
  border-color: rgba(212, 166, 74, .5);
}

.page-about .tl-chip[aria-pressed="true"] {
  color: var(--c-ink);
  background: var(--c-gold);
  border-color: var(--c-gold);
}

.page-about .tl-status {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-mist);
}

.page-about .tl-track {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding: 4px 0 20px;
  scroll-snap-type: x proximity;
}

.page-about .tl-node {
  flex: 0 0 min(276px, 80vw);
  scroll-snap-align: start;
  padding: 18px 18px 20px;
  background: var(--c-veil);
  border: var(--about-line);
  border-left: 2px solid rgba(212, 166, 74, .55);
}

.page-about .tl-node[hidden] {
  display: none !important;
}

.page-about .tl-node__summary {
  position: relative;
  display: block;
  list-style: none;
  cursor: pointer;
}

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

.page-about .tl-node__summary::after {
  content: "＋";
  float: right;
  font-size: 14px;
  line-height: 1;
  color: var(--c-gold);
}

.page-about .tl-node[open] .tl-node__summary::after {
  content: "－";
}

.page-about .tl-node__idx {
  display: block;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--c-gold);
}

.page-about .tl-node__title {
  display: block;
  margin: 9px 0 6px;
  padding-right: 22px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.35;
  color: var(--c-ivory);
}

.page-about .tl-node__hint {
  display: block;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--c-mist);
}

.page-about .tl-node__body {
  margin-top: 13px;
  padding-top: 13px;
  border-top: var(--about-line);
  font-size: 13.5px;
  line-height: 1.82;
  color: var(--about-text);
}

.page-about .tl-figure {
  margin: clamp(26px, 4vw, 42px) 0 0;
}

.page-about .tl-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .tl-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-mist);
}

/* ---------- 团队 ---------- */

.page-about .team {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

.page-about .team__figure {
  margin: 0;
  border: var(--about-line);
}

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

.page-about .team__roles {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
}

.page-about .team__role {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-top: var(--about-line);
}

.page-about .team__role:last-child {
  border-bottom: var(--about-line);
}

.page-about .team__role-name {
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--c-gold);
}

.page-about .team__role-desc {
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-text);
}

/* ---------- 合作与荣誉 ---------- */

.page-about .eco {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-about .eco__panel {
  padding: clamp(22px, 3vw, 32px);
  background: var(--c-veil);
  border: var(--about-line);
}

.page-about .eco__panel--seal {
  background: transparent;
  border-color: rgba(196, 73, 54, .42);
}

.page-about .eco__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: .02em;
  color: var(--c-gold-soft);
}

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

.page-about .eco__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .eco__item {
  position: relative;
  padding: 8px 0 8px 18px;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(245, 239, 226, .74);
  border-top: var(--about-line);
}

.page-about .eco__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 9px;
  height: 1px;
  background: var(--c-gold);
}

.page-about .eco__seal {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 128px;
  height: 128px;
  margin: 4px 0 20px;
  border: 2px solid var(--c-cinnabar);
  color: var(--c-cinnabar);
  font-family: var(--font-display);
  font-size: 14px;
  line-height: 1.35;
  letter-spacing: .06em;
  text-align: center;
  transform: rotate(-4deg);
}

/* ---------- 到访四步 ---------- */

.page-about .steps {
  display: grid;
  gap: 1px;
  background: rgba(28, 53, 84, .9);
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
}

.page-about .step {
  background: var(--c-ink);
  padding: clamp(20px, 3vw, 28px);
}

.page-about .step__idx {
  display: block;
  font-family: var(--font-num);
  font-size: 28px;
  line-height: 1;
  color: var(--c-gold);
}

.page-about .step__title {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  color: var(--c-ivory);
}

.page-about .step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--about-text);
}

.page-about .visit-links {
  display: grid;
  gap: 12px;
  margin-top: clamp(26px, 3.6vw, 40px);
}

.page-about .visit-links__item {
  display: block;
  padding: 16px 18px;
  text-decoration: none;
  background: var(--c-veil);
  border: var(--about-line);
  border-left: 2px solid rgba(63, 139, 132, .8);
  transition: border-left-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .visit-links__item:hover,
.page-about .visit-links__item:focus-visible {
  border-left-color: var(--c-gold);
  background: rgba(16, 35, 63, .95);
}

.page-about .visit-links__label {
  display: block;
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--c-gold-soft);
}

.page-about .visit-links__desc {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 结尾 ---------- */

.page-about .about-cta {
  padding: var(--about-pad) 0;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.25;
  color: var(--c-ivory);
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-text);
}

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

.page-about .about-cta__actions .btn {
  padding: 14px 24px;
  font-size: 13.5px;
  letter-spacing: .08em;
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .team__role {
    grid-template-columns: 104px 1fr;
    gap: 18px;
    align-items: baseline;
  }

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

@media (min-width: 720px) {
  .page-about .pillars {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .page-about .tl-status {
    margin-left: auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.05fr .95fr;
    align-items: end;
    gap: clamp(30px, 4.6vw, 66px);
  }

  .page-about .about-sec__inner {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .eco {
    grid-template-columns: 1.15fr .85fr;
    align-items: start;
  }

  .page-about .tl-figure {
    width: 64%;
    margin-left: auto;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 36px;
  }
}

@media (min-width: 960px) {
  .page-about .team {
    grid-template-columns: 1.05fr .95fr;
    align-items: start;
  }

  .page-about .team__figure {
    margin-top: 12px;
  }
}

@media (min-width: 1080px) {
  .page-about .pillars {
    grid-template-columns: repeat(4, 1fr);
    align-items: start;
  }

  .page-about .pillar:nth-child(even) {
    margin-top: 38px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .pillar,
  .page-about .tl-node__summary,
  .page-about .visit-links__item,
  .page-about .about-chapters__link {
    transition: none;
  }

  .page-about .eco__seal {
    transform: none;
  }
}