.page-about {
  --about-track-x: clamp(1.6rem, 4.5vw, 3rem);
  --about-measure: 34rem;
  display: block;
  background: var(--c-void);
  color: var(--c-paper);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(0.9rem, 3vw, 1.6rem);
}
.page-about .about-crumb__sep {
  padding: 0 0.45rem;
  color: var(--c-mist);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-bottom: clamp(0.5rem, 2vw, 1.2rem);
  background:
    radial-gradient(120% 90% at 78% 6%, rgba(28, 110, 154, 0.34) 0%, rgba(28, 110, 154, 0) 62%),
    linear-gradient(180deg, var(--c-deep) 0%, var(--c-void) 76%);
}
.page-about .about-hero__cut {
  position: absolute;
  left: -18%;
  right: -18%;
  top: 42%;
  height: 32%;
  transform: rotate(-8deg);
  background: linear-gradient(100deg, rgba(18, 60, 85, 0.8), rgba(13, 18, 22, 0) 72%);
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(1.6rem, 5vw, 3.2rem);
  padding-bottom: clamp(1.2rem, 3.5vw, 2rem);
}
.page-about .about-hero__title {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.2rem, 7.4vw, 4.9rem);
  line-height: 1.04;
  letter-spacing: -0.01em;
  max-width: 20ch;
  color: var(--c-paper);
}
.page-about .about-hero__lede {
  max-width: 46rem;
  margin-top: clamp(1rem, 3vw, 1.6rem);
  color: var(--c-mist);
}
.page-about .about-hero__meta {
  list-style: none;
  margin: clamp(1.6rem, 4.5vw, 2.6rem) 0 0;
  padding: clamp(1rem, 3vw, 1.4rem) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.page-about .about-metric {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}
.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(1.5rem, 4.4vw, 2.6rem);
  line-height: 1;
  color: var(--c-lava);
  font-variant-numeric: tabular-nums;
}
.page-about .about-metric__label {
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  line-height: 1.5;
  color: var(--c-mist);
}
.page-about .about-hero__media {
  position: relative;
  margin: 0 auto;
  max-width: var(--content-max);
  padding: 0 var(--pad-x);
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
  filter: saturate(0.9) contrast(1.05);
}
.page-about .about-hero__media figcaption {
  margin-top: 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

/* ---------- 赛季时间轨道 ---------- */
.page-about .about-timeline {
  background:
    radial-gradient(90% 60% at 6% 0%, rgba(18, 60, 85, 0.5) 0%, rgba(18, 60, 85, 0) 62%),
    var(--c-void);
}
.page-about .about-timeline__head {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.4rem);
  margin-bottom: clamp(2rem, 5vw, 3.2rem);
}
.page-about .about-timeline__note {
  margin: 0.9rem 0 0;
  max-width: 36rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(241, 247, 250, 0.72);
}
.page-about .about-timeline__figure {
  margin: 0;
  max-width: 20rem;
}
.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line);
}
.page-about .about-timeline__figure figcaption {
  margin-top: 0.55rem;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--c-mist);
}
.page-about .about-timeline__grid {
  position: relative;
}
.page-about .about-trackline {
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 2px;
  height: calc(100% - 1rem);
  overflow: visible;
}
.page-about .season-track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-track-x);
  display: grid;
  gap: clamp(1.7rem, 4.4vw, 2.8rem);
}
.page-about .season-node {
  position: relative;
  outline-offset: 6px;
}
.page-about .season-node::before {
  content: "";
  position: absolute;
  left: calc(var(--about-track-x) * -1 - 5px);
  top: 0.35rem;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--c-void);
  border: 2px solid var(--c-mist);
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.page-about .season-node:hover::before,
.page-about .season-node:focus::before,
.page-about .season-node:focus-within::before {
  border-color: var(--c-lava);
  background: var(--c-lava);
  box-shadow: 0 0 0 5px rgba(232, 88, 28, 0.16);
}
.page-about .season-node__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}
.page-about .season-node__title {
  margin: 0.4rem 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.25rem, 4vw, 1.85rem);
  line-height: 1.2;
  color: var(--c-paper);
}
.page-about .season-node__text {
  margin: 0.6rem 0 0;
  max-width: var(--about-measure);
  font-size: 0.95rem;
  line-height: 1.78;
  color: rgba(241, 247, 250, 0.72);
}
.page-about .season-node:nth-child(n + 3) .season-node__text {
  max-width: calc(var(--about-measure) + 4rem);
}
.page-about .season-node:nth-child(n + 5) .season-node__text {
  max-width: calc(var(--about-measure) + 8rem);
}
.page-about .season-node__hint {
  display: block;
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--c-lava-soft);
  transition:
    max-height var(--dur) var(--ease),
    margin-top var(--dur) var(--ease),
    opacity var(--dur) var(--ease);
}
.page-about .season-node:hover .season-node__hint,
.page-about .season-node:focus .season-node__hint,
.page-about .season-node:focus-within .season-node__hint {
  max-height: 6rem;
  margin-top: 0.55rem;
  opacity: 1;
}

/* ---------- 值守与更新 ---------- */
.page-about .about-duty {
  background:
    radial-gradient(80% 60% at 100% 0%, rgba(28, 110, 154, 0.38) 0%, rgba(28, 110, 154, 0) 62%),
    var(--c-plate);
}
.page-about .about-duty__top {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.8rem);
}
.page-about .about-duty__text {
  margin: 0.9rem 0 0;
  max-width: 36rem;
  font-size: 0.98rem;
  line-height: 1.85;
  color: rgba(241, 247, 250, 0.82);
}
.page-about .about-duty__media {
  margin: 0;
}
.page-about .about-duty__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  box-shadow: 10px 10px 0 0 rgba(10, 31, 43, 0.85);
}
.page-about .about-duty__media figcaption {
  margin-top: 0.7rem;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--c-mist);
}
.page-about .dutyfacts {
  margin: clamp(2rem, 5vw, 3rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-about .dutyfact {
  display: grid;
  gap: 0.35rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .dutyfact__term {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--c-lava-soft);
}
.page-about .dutyfact__desc {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: rgba(241, 247, 250, 0.8);
}

/* ---------- 数据来源 ---------- */
.page-about .about-sources {
  background: var(--c-void);
}
.page-about .about-sources__grid {
  display: grid;
  gap: clamp(1.8rem, 5vw, 3rem);
}
.page-about .about-sources__copy p {
  margin: 0.95rem 0 0;
  max-width: 38rem;
  font-size: 0.96rem;
  line-height: 1.85;
  color: rgba(241, 247, 250, 0.75);
}
.page-about .about-sources__panel {
  padding: clamp(1.4rem, 3.5vw, 2rem);
  background: var(--c-graphite);
  border: 1px solid var(--line);
  box-shadow: 8px 8px 0 0 rgba(28, 110, 154, 0.3);
}
.page-about .about-sources__panelnum {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(2.8rem, 9vw, 4.4rem);
  line-height: 1;
  color: var(--c-lava);
  font-variant-numeric: tabular-nums;
}
.page-about .about-sources__panelcap {
  margin: 0.5rem 0 0;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--c-mist);
}
.page-about .about-sources__panel .rule {
  margin: 1.2rem 0;
  border: 0;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-sources__panelnote {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: rgba(241, 247, 250, 0.7);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--c-paper);
  color: var(--c-void);
}
.page-about .about-team .eyebrow {
  color: var(--c-main);
}
.page-about .about-team .section-title {
  color: var(--c-deep);
}
.page-about .about-team__grid {
  margin-top: clamp(1.7rem, 4vw, 2.6rem);
  display: grid;
  gap: 1px;
  background: rgba(28, 110, 154, 0.3);
  border: 1px solid rgba(28, 110, 154, 0.3);
}
.page-about .teamcard {
  background: var(--c-paper);
  padding: clamp(1.3rem, 3.5vw, 1.9rem);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition:
    background-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}
.page-about .teamcard:hover {
  background: #ffffff;
  transform: translateY(-3px);
}
.page-about .teamcard__idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--c-lava);
}
.page-about .teamcard__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  line-height: 1.2;
  color: var(--c-deep);
}
.page-about .teamcard p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: #33424c;
}

/* ---------- 阅读取向 ---------- */
.page-about .about-identity {
  background: linear-gradient(180deg, var(--c-void) 0%, var(--c-deep) 100%);
}
.page-about .about-identity__lede {
  margin: 0.95rem 0 0;
  max-width: 42rem;
  font-size: 1.02rem;
  line-height: 1.85;
  color: rgba(241, 247, 250, 0.78);
}
.page-about .identitylist {
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}
.page-about .identitylist__item {
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
}
.page-about .identitylist__item dt {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--c-lava-soft);
}
.page-about .identitylist__item dd {
  margin: 0.5rem 0 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: rgba(241, 247, 250, 0.74);
}

/* ---------- 版本方向 ---------- */
.page-about .about-next {
  background:
    radial-gradient(70% 70% at 0% 100%, rgba(232, 88, 28, 0.14) 0%, rgba(232, 88, 28, 0) 64%),
    var(--c-graphite);
}
.page-about .nextlist {
  list-style: none;
  margin: clamp(1.7rem, 4vw, 2.6rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1.6rem;
}
.page-about .nextitem {
  display: grid;
  gap: 0.5rem;
  align-content: start;
  padding-top: 1.1rem;
  border-top: 2px solid var(--c-lava);
}
.page-about .nextitem__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--c-lava);
}
.page-about .nextitem__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.2rem, 3.2vw, 1.55rem);
  line-height: 1.2;
  color: var(--c-paper);
}
.page-about .nextitem p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: rgba(241, 247, 250, 0.74);
}
.page-about .about-next__more {
  margin: clamp(1.6rem, 4vw, 2.2rem) 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(241, 247, 250, 0.7);
}
.page-about .about-next__more a {
  color: var(--c-lava-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  background: var(--c-void);
  border-top: 1px solid var(--line);
}
.page-about .about-cta__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(1.7rem, 5vw, 2.8rem);
  line-height: 1.15;
  color: var(--c-paper);
}
.page-about .about-cta__text {
  margin: 0.9rem 0 0;
  max-width: 38rem;
  font-size: 0.96rem;
  line-height: 1.82;
  color: rgba(241, 247, 250, 0.74);
}
.page-about .about-cta__links {
  margin-top: clamp(1.3rem, 3.5vw, 2rem);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .dutyfact {
    grid-template-columns: 12rem minmax(0, 1fr);
    gap: 1.5rem;
    align-items: baseline;
  }
  .page-about .identitylist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.8rem 3rem;
  }
}

@media (min-width: 880px) {
  .page-about .about-timeline__head {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.75fr);
    align-items: end;
  }
  .page-about .about-timeline__figure {
    max-width: none;
  }
  .page-about .nextlist {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-duty__top {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
  .page-about .about-sources__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 20rem);
    align-items: start;
  }
}

@media (min-width: 1020px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .identitylist {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-about .about-hero__meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.1rem 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .season-node::before,
  .page-about .season-node__hint,
  .page-about .teamcard {
    transition: none;
  }
  .page-about .teamcard:hover {
    transform: none;
  }
}