.page-about {
  --about-band-pad: clamp(48px, 8vw, 96px);
  background: var(--fog);
  color: var(--ink);
  font-family: var(--font-body);
}

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

.page-about .about-wrap {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5em;
  padding-top: clamp(16px, 3vw, 28px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

.page-about .about-crumbs a {
  color: var(--graphite);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(20px, 3vw, 34px) clamp(48px, 7vw, 84px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  align-items: center;
}

.page-about .about-kicker {
  margin: 0 0 14px;
  color: var(--graphite);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-hero__lead {
  margin: 0 0 14px;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.65;
  color: var(--ink-2);
  max-width: 34em;
}

.page-about .about-hero__text {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite);
  max-width: 34em;
}

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

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
}

.page-about .about-hero__media {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
  background: var(--ink-2);
}

.page-about .about-hero__media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero__glass {
  position: absolute;
  left: clamp(12px, 2vw, 22px);
  right: clamp(12px, 2vw, 22px);
  bottom: clamp(12px, 2vw, 22px);
  padding: 14px 16px;
  border-radius: 2px;
}

.page-about .about-hero__glass-k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--yellow);
}

.page-about .about-hero__glass-v {
  margin: 0.4em 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: #ffffff;
}

/* ---------- 通用区块 ---------- */
.page-about .about-band {
  padding-block: var(--about-band-pad);
}

.page-about .about-band--fog {
  background: var(--fog);
}

.page-about .about-band--paper {
  background: var(--sand);
}

.page-about .about-band--ink {
  background: var(--ink);
  color: var(--fog);
}

.page-about .about-band--tight {
  padding-block: clamp(40px, 6vw, 76px);
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-about .about-h2--light {
  color: #ffffff;
}

.page-about .about-p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite);
  max-width: 38em;
}

.page-about .about-p--light {
  color: rgba(244, 246, 248, 0.78);
}

.page-about .about-p--wide {
  max-width: 46em;
}

.page-about .about-serif {
  margin: 0 0 20px;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.5;
  color: var(--ink);
  max-width: 22em;
}

.page-about .about-figcap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--graphite);
}

/* ---------- 出发点 ---------- */
.page-about .about-manifesto {
  display: grid;
  gap: clamp(16px, 3vw, 36px);
}

.page-about .about-manifesto__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(56px, 9vw, 116px);
  line-height: 0.8;
  color: rgba(14, 27, 44, 0.12);
  letter-spacing: -0.04em;
}

.page-about .about-points {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-point {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 14px 0;
  border-top: 1px dashed var(--line);
}

.page-about .about-point__idx {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--yellow);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-point__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
}

.page-about .about-point__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--graphite);
}

/* ---------- 阶段轴 ---------- */
.page-about .about-timeline__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  border-left: 1px dashed var(--line);
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--ink-2);
  text-decoration: none;
  padding: 3px 0;
  transition: color 0.2s var(--ease);
}

.page-about .about-rail__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--yellow);
  flex: none;
  transition: background-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--mint);
}

.page-about .about-rail__link:hover .about-rail__dot,
.page-about .about-rail__link:focus-visible .about-rail__dot {
  background: var(--mint);
  transform: scale(1.25);
}

.page-about .about-stages {
  display: grid;
  gap: 0;
}

.page-about .about-stage {
  padding-block: clamp(20px, 3vw, 30px);
  border-top: 1px dashed var(--line);
}

.page-about .about-stage:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .about-stage__idx {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-stage__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.25;
  color: var(--ink);
}

.page-about .about-timeline__figure {
  margin: clamp(22px, 3vw, 34px) 0;
  max-width: 340px;
  border-left: 4px solid var(--mint);
  padding-left: clamp(14px, 2vw, 20px);
}

.page-about .about-timeline__figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background: var(--ink-2);
  border-radius: 2px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img {
  width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  background: var(--ink-2);
  border-radius: 2px;
}

.page-about .about-roles {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-role {
  padding-block: 15px;
  border-top: 1px dashed var(--line);
}

.page-about .about-role__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-role__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--graphite);
}

.page-about .about-role__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
}

.page-about .about-role__base {
  margin: 6px 0 0 30px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-role__more {
  margin: 8px 0 0 30px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
  border-left: 3px solid var(--yellow);
  padding-left: 12px;
}

/* ---------- 场景 ---------- */
.page-about .about-scenes {
  display: grid;
  gap: clamp(12px, 2vw, 20px);
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-scene {
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-2);
  border-left: 3px solid var(--yellow);
}

.page-about .about-scene--mint {
  border-left-color: var(--mint);
}

.page-about .about-scene--orange {
  border-left-color: var(--orange);
}

.page-about .about-scene__idx {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(244, 246, 248, 0.55);
}

.page-about .about-scene__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.35;
  color: #ffffff;
}

.page-about .about-scene__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 246, 248, 0.76);
}

/* ---------- 节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-cadence__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px dashed var(--line);
  align-content: start;
}

.page-about .about-stat {
  padding: 18px 10px 18px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.page-about .about-stat__label {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--graphite);
}

/* ---------- 联系 ---------- */
.page-about .about-band--cta {
  padding-block: clamp(44px, 6vw, 84px);
}

.page-about .about-cta {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: center;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-stat {
    padding-right: 16px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-hero__body {
    border-left: 1px dashed var(--line);
    padding-left: clamp(20px, 3vw, 34px);
  }

  .page-about .about-manifesto {
    grid-template-columns: 180px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 16px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-about .about-cadence {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (hover: hover) and (min-width: 768px) {
  .page-about .about-role__more {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    margin-top: 0;
    transition: max-height 0.32s var(--ease), opacity 0.32s var(--ease), margin-top 0.32s var(--ease);
  }

  .page-about .about-role:hover .about-role__more,
  .page-about .about-role:focus-within .about-role__more {
    max-height: 7em;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role__more,
  .page-about .about-rail__dot,
  .page-about .about-crumbs a {
    transition: none;
  }

  .page-about .about-role:hover .about-role__more,
  .page-about .about-role:focus-within .about-role__more {
    max-height: none;
  }
}
</main>