.page-about {
  background: var(--color-surface);
  color: var(--color-ink);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-3) var(--gutter) 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-about .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease, color 160ms ease;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  align-items: end;
  min-height: clamp(520px, 74vh, 720px);
  overflow: hidden;
  background: var(--color-contrast-surface);
  isolation: isolate;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  z-index: 0;
}

.page-about .about-hero__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  z-index: 1;
}

.page-about .about-hero__body {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-8) var(--gutter) var(--space-6);
  color: var(--color-contrast-ink);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.3em;
  color: var(--color-contrast-accent);
}

.page-about .about-hero__title {
  margin: 0 0 var(--space-3);
  max-width: 16em;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-about .about-hero__lede {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

.page-about .about-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35em;
}

.page-about .about-hero__facts .mono {
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-accent);
}

@media (min-width: 720px) {
  .page-about .about-hero__title {
    font-size: var(--text-4xl);
  }
  .page-about .about-hero__body {
    padding-bottom: var(--space-8);
  }
}

/* ---------- 主体：左轴 + 右流 ---------- */
.page-about .about-canvas {
  box-sizing: border-box;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin: 0 auto;
  padding: var(--section-y) var(--gutter) var(--space-6);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 960px) {
  .page-about .about-canvas {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: var(--space-8);
    padding-top: var(--section-y-lg);
  }
}

/* ---------- 赛季刻度 ---------- */
.page-about .about-rail {
  display: none;
}

@media (min-width: 960px) {
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: 120px;
    align-self: start;
  }
}

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

.page-about .rail-list::before {
  content: "";
  position: absolute;
  left: 4px;
  top: var(--space-1);
  bottom: var(--space-1);
  width: 1px;
  background: var(--color-line);
}

.page-about .rail-item {
  position: relative;
  margin: 0 0 var(--space-4);
}

.page-about .rail-item:last-child {
  margin-bottom: 0;
}

.page-about .rail-link {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  padding-left: var(--space-4);
  text-decoration: none;
  color: var(--color-ink-muted);
  transition: color 200ms ease;
}

.page-about .rail-dot {
  position: absolute;
  left: 0;
  top: 0.4em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-line);
  transition: background-color 240ms ease, transform 240ms ease;
}

.page-about .rail-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

.page-about .rail-name {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
}

.page-about .rail-item.is-lit .rail-dot {
  background: var(--color-primary);
  transform: scale(1.25);
}

.page-about .rail-item.is-lit .rail-name,
.page-about .rail-item.is-lit .rail-num {
  color: var(--color-primary);
}

.page-about .rail-link:hover .rail-name,
.page-about .rail-link:focus-visible .rail-name {
  color: var(--color-accent);
}

/* ---------- 正文流 ---------- */
.page-about .about-stream {
  min-width: 0;
}

.page-about .stream-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding-bottom: var(--space-8);
  margin-bottom: var(--space-8);
}

.page-about .stream-block:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
}

@media (min-width: 720px) {
  .page-about .stream-block {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: var(--space-4);
    align-items: start;
  }
}

.page-about .stream-block__marker {
  display: none;
}

@media (min-width: 720px) {
  .page-about .stream-block__marker {
    display: block;
    padding-top: 0.4em;
  }
}

.page-about .vmark {
  writing-mode: vertical-rl;
  text-orientation: upright;
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.26em;
  line-height: 1;
  color: var(--color-primary);
}

.page-about .stream-block__body {
  min-width: 0;
  max-width: var(--measure);
}

.page-about .stream-block__body h2 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-about .stream-block__body h2::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  margin-bottom: var(--space-2);
  background: var(--color-accent);
}

.page-about .stream-block__body p {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-about .stream-block__body p:last-child {
  margin-bottom: 0;
}

@media (min-width: 960px) {
  .page-about .stream-block__body h2 {
    font-size: var(--text-2xl);
  }
}

/* ---------- 团队 ---------- */
.page-about .team-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-2);
}

@media (min-width: 780px) {
  .page-about .team-split {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }
}

.page-about .team-figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: var(--color-surface-deep);
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 9 / 7;
}

.page-about .team-copy p {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-about .team-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: var(--space-3);
  list-style: none;
  background: var(--color-surface-deep);
  border-radius: var(--radius-sm);
}

@media (min-width: 520px) {
  .page-about .team-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .team-facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .team-facts .mono {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-accent);
  line-height: 1.1;
}

.page-about .team-facts span:last-child {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 数据横带 ---------- */
.page-about .about-band {
  position: relative;
  margin: 0 0 var(--space-4);
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: var(--color-contrast-surface);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1400 / 480;
  object-fit: cover;
}

.page-about .about-band__scrim {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 4px;
  padding: var(--space-4);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
}

.page-about .about-band__label {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.24em;
  color: var(--color-contrast-accent);
}

.page-about .about-band__text {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
}

/* ---------- 接下来 ---------- */
.page-about .next-step {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-highlight);
  border-radius: var(--radius-sm);
}

.page-about .next-step__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-about .next-step__text {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 出口 ---------- */
.page-about .about-exit {
  background: var(--color-primary-soft);
  padding: var(--section-y) var(--gutter);
}

.page-about .about-exit__inner {
  max-width: var(--container);
  margin: 0 auto;
}

.page-about .about-exit__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-about .about-exit__lead {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-about .exit-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .exit-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background-color 180ms ease, color 180ms ease;
}

.page-about .exit-link:hover,
.page-about .exit-link:focus-visible {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-about .exit-link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-about .exit-tip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + var(--space-2));
  transform: translate(-50%, 6px);
  padding: var(--space-1) var(--space-2);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--weight-body);
  white-space: nowrap;
  border-radius: var(--radius-sm);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.page-about .exit-link:hover .exit-tip,
.page-about .exit-link:focus-visible .exit-tip {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .exit-tip,
  .page-about .exit-link,
  .page-about .rail-dot {
    transition: none;
  }
}
</main>