.page-about {
  --about-measure: 680px;
  --about-seq-gap: clamp(20px, 4vw, 44px);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: 18px;
  padding-bottom: 6px;
  font-size: 13px;
  color: var(--ink-3);
}
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}
.page-about .breadcrumb a {
  color: var(--ink-2);
  text-decoration: none;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-bottom: clamp(28px, 5vw, 56px);
}
.page-about .about-hero-figure {
  margin: 0;
  overflow: hidden;
}
.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: clamp(210px, 40vh, 440px);
  object-fit: cover;
}
.page-about .about-hero-figure::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 55%;
  background: linear-gradient(180deg, rgba(6, 11, 26, 0) 0%, rgba(6, 11, 26, 0.86) 72%, var(--night) 100%);
  pointer-events: none;
}
.page-about .about-hero-body {
  position: relative;
  z-index: 1;
  margin-top: clamp(-96px, -8vw, -48px);
}
.page-about .about-h1 {
  margin: 10px 0 0;
  font-size: clamp(34px, 7vw, 68px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  max-width: 15em;
}
.page-about .about-lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: var(--about-measure);
  color: var(--ink);
}
.page-about .about-lede-secondary {
  margin: 14px 0 0;
  max-width: var(--about-measure);
  color: var(--ink-2);
  font-size: 15px;
  line-height: 1.72;
}

/* 数据条 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 5vw, 48px) auto 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  clip-path: var(--cut);
}
.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--board);
}
.page-about .about-stats .stat-value {
  font-family: var(--font-num);
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 800;
  line-height: 1;
  color: var(--cyan);
}
.page-about .about-stats .stat-value--orange {
  color: var(--orange);
}
.page-about .about-stats .stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-2);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: block;
  padding-bottom: clamp(48px, 8vw, 96px);
}
.page-about .about-flow {
  min-width: 0;
}
.page-about .about-sec {
  padding: clamp(38px, 7vw, 78px) 0;
  border-top: 1px solid var(--line);
}
.page-about .about-sec:first-child {
  border-top: 0;
}
.page-about .about-seq {
  margin: 0 0 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.page-about .about-seq span {
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--night);
  background: var(--cyan);
  padding: 4px 10px 4px 14px;
  clip-path: var(--cut-tag);
}
.page-about .about-seq::after {
  content: "";
  flex: 1;
  max-width: 160px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(56, 242, 208, 0) 100%);
  transform: skewX(-24deg);
}
.page-about .about-sec-title {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-family: var(--font-display);
  font-size: clamp(26px, 5.2vw, 44px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: var(--ink);
  max-width: 18em;
}
.page-about .about-copy {
  max-width: var(--about-measure);
}
.page-about .about-copy p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.72;
  color: var(--ink-2);
}
.page-about .about-copy p:last-child {
  margin-bottom: 0;
}

/* 侧注 */
.page-about .about-note {
  max-width: var(--about-measure);
  margin-top: 22px;
  padding: 16px 18px;
  background: var(--board);
  border-left: 2px solid var(--cyan);
  clip-path: var(--cut-sm);
}
.page-about .about-note .meta {
  margin: 0 0 6px;
  color: var(--cyan);
  letter-spacing: 0.08em;
}
.page-about .about-note p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 能力地图 ---------- */
.page-about .about-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(22px, 4vw, 34px);
  padding: 1px;
  background: var(--line);
  clip-path: var(--cut);
}
.page-about .map-cell {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--board);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .map-cell::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  pointer-events: none;
  transition: border-color var(--dur) var(--ease);
}
.page-about .map-cell:hover,
.page-about .map-cell:focus-within {
  background: var(--board-2);
}
.page-about .map-cell:hover::before,
.page-about .map-cell:focus-within::before {
  border-color: var(--cyan);
}
.page-about .map-cell h3 {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 24px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}
.page-about .map-cell p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-2);
}
.page-about .map-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 208, 0.35);
  padding-bottom: 2px;
}
.page-about .map-link:hover,
.page-about .map-link:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 32px);
  align-items: start;
}
.page-about .about-team-figure {
  margin: 0;
}
.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-shifts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(22px, 4vw, 32px) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  clip-path: var(--cut-sm);
}
.page-about .about-shifts li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  align-items: baseline;
  padding: 14px 16px;
  background: var(--board);
}
.page-about .shift-key {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--orange);
  min-width: 3.6em;
}
.page-about .shift-val {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin-top: clamp(24px, 4vw, 36px);
  padding-left: 30px;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--glow) 55%, rgba(38, 53, 92, 0) 100%);
  transform: skewX(-6deg);
  transform-origin: top;
}
.page-about .tl-node {
  position: relative;
  padding: 0 0 clamp(24px, 4vw, 34px);
}
.page-about .tl-node:last-child {
  padding-bottom: 0;
}
.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 11px;
  height: 11px;
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  box-shadow: 0 0 0 3px var(--night);
}
.page-about .tl-phase {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.page-about .tl-node h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 27px);
  font-weight: 700;
  line-height: 1.24;
  color: var(--ink);
}
.page-about .tl-node > p {
  margin: 0;
  max-width: var(--about-measure);
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-2);
}
.page-about .tl-more {
  max-width: var(--about-measure);
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 220ms var(--ease), opacity 200ms var(--ease), margin-top 220ms var(--ease);
}
.page-about .tl-node:hover .tl-more,
.page-about .tl-node:focus-within .tl-more {
  max-height: 260px;
  opacity: 1;
  margin-top: 12px;
}
.page-about .tl-more p {
  margin: 0 0 10px;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}
.page-about .tl-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 208, 0.35);
}
.page-about .tl-link:hover,
.page-about .tl-link:focus-visible {
  border-bottom-color: var(--cyan);
}
.page-about .about-seasons-figure {
  margin: 0 0 clamp(24px, 4vw, 34px);
}
.page-about .about-seasons-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 伙伴 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(22px, 4vw, 30px);
}
.page-about .partner-card {
  padding: 20px 20px 22px;
  background: var(--board);
  border-top: 2px solid var(--orange);
  clip-path: var(--cut);
}
.page-about .partner-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(19px, 3vw, 23px);
  font-weight: 700;
  line-height: 1.28;
  color: var(--ink);
}
.page-about .partner-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-2);
}
.page-about .about-partners-note {
  margin: 18px 0 0;
  max-width: var(--about-measure);
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  padding: clamp(34px, 6vw, 62px) 0 0;
  border-top: 1px solid var(--line);
}
.page-about .about-cta-title {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-family: var(--font-display);
  font-size: clamp(24px, 4.4vw, 36px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
  max-width: 20em;
}
.page-about .about-cta-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  clip-path: var(--cut);
}
.page-about .about-cta-list a {
  display: grid;
  gap: 6px;
  padding: 18px 18px 20px;
  background: var(--board);
  text-decoration: none;
  transition: background var(--dur) var(--ease);
}
.page-about .about-cta-list a:hover,
.page-about .about-cta-list a:focus-visible {
  background: var(--board-2);
}
.page-about .cta-key {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--orange);
}
.page-about .cta-main {
  font-family: var(--font-display);
  font-size: clamp(19px, 3vw, 23px);
  font-weight: 700;
  line-height: 1.26;
  color: var(--ink);
}
.page-about .about-cta-list a:hover .cta-main,
.page-about .about-cta-list a:focus-visible .cta-main {
  color: var(--cyan);
}
.page-about .cta-sub {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
}

/* ---------- 右侧锚点目录 ---------- */
.page-about .about-anchor {
  display: none;
  margin-top: clamp(38px, 7vw, 78px);
}
.page-about .about-anchor-title {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink-3);
  text-transform: uppercase;
}
.page-about .about-anchor ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}
.page-about .about-anchor a {
  display: block;
  padding: 8px 10px 8px 12px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--ink-2);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-about .about-anchor a:hover,
.page-about .about-anchor a:focus-visible {
  color: var(--cyan);
  background: var(--cyan-soft);
}
.page-about .about-anchor a[aria-current="true"] {
  color: var(--ink);
  border-left-color: var(--cyan);
}

/* ---------- 聚焦环 ---------- */
.page-about a:focus-visible,
.page-about .map-cell:focus-within {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-map {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-shifts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
  .page-about .about-map {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  }
  .page-about .about-shifts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1060px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 216px;
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
  .page-about .about-anchor {
    display: block;
    position: sticky;
    top: 108px;
  }
  .page-about .about-timeline {
    padding-left: 38px;
  }
  .page-about .tl-node::before {
    left: -34px;
  }
}

@media (max-width: 480px) {
  .page-about .about-anchor {
    display: none;
  }
  .page-about .map-cell,
  .page-about .partner-card {
    padding: 18px 16px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .map-cell,
  .page-about .about-cta-list a,
  .page-about .tl-more,
  .page-about .about-anchor a {
    transition: none;
  }
  .page-about .about-timeline::before {
    transform: none;
  }
}