.page-about {
  display: block;
  background: var(--cream-050);
  color: var(--brown-900);
  --about-measure: 74ch;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ink-900);
  color: var(--on-ink);
  padding-bottom: clamp(28px, 5vw, 56px);
}

.page-about .about-hero__inner {
  padding-top: clamp(26px, 4vw, 46px);
  padding-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-hero .breadcrumb {
  color: var(--on-ink-faint);
  font-size: 12px;
}

.page-about .about-hero .breadcrumb a {
  color: var(--on-ink-soft);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--gold-500);
}

.page-about .about-hero__eyebrow,
.page-about .about-hero .eyebrow {
  margin: clamp(22px, 3vw, 34px) 0 0;
  color: var(--gold-500);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.2vw, 54px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--on-ink);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--on-ink-soft);
}

.page-about .about-hero__sign {
  margin: 26px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--gold-line);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold-200);
}

.page-about .about-hero__figure {
  margin: 0;
  padding: 0 var(--gutter);
  max-width: var(--shell);
  margin-inline: auto;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--gold-line);
  border-radius: var(--radius);
  background: var(--ink-700);
}

.page-about .about-hero__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--on-ink-faint);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--slate-600);
  text-transform: uppercase;
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 1px solid var(--hairline-strong);
}

.page-about .about-index__list a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--ink-700);
  text-decoration: none;
}

.page-about .about-index__list a .mono {
  font-size: 11px;
  color: var(--gold-500);
  letter-spacing: .08em;
}

.page-about .about-index__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--gold-500);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .2s var(--ease);
}

.page-about .about-index__list a:hover {
  color: var(--brown-900);
}

.page-about .about-index__list a:hover::after {
  transform: scaleX(1);
}

.page-about .about-content {
  display: grid;
  gap: clamp(48px, 6vw, 88px);
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  min-width: 0;
}

.page-about .chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline-strong);
}

.page-about .chapter__num {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold-500);
}

.page-about .chapter h2 {
  margin: 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(21px, 2.8vw, 31px);
  line-height: 1.35;
  color: var(--ink-900);
}

.page-about .chapter__body {
  display: grid;
  gap: 18px;
  max-width: var(--about-measure);
  margin-top: 24px;
  min-width: 0;
}

.page-about .chapter__body p {
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--brown-900);
}

.page-about .chapter__sub {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--ink-900);
}

.page-about .chapter__col {
  display: grid;
  gap: 18px;
  min-width: 0;
}

/* ---------- 分区方块 ---------- */
.page-about .about-map {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-map__cell {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 12px;
  background: var(--cream-100);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--ink-700);
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-map__cell .mono {
  font-size: 11px;
  color: var(--gold-500);
}

.page-about .about-map__cell:hover {
  background: #fff;
  border-color: var(--gold-500);
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 6px 0 0;
  min-width: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--cream-100);
}

.page-about .about-figure--team img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure figcaption {
  margin-top: 9px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate-600);
}

/* ---------- 上线流程 ---------- */
.page-about .about-flow {
  counter-reset: flow;
  display: grid;
  gap: 16px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__step {
  counter-increment: flow;
  padding-top: 12px;
  border-top: 2px solid var(--gold-200);
}

.page-about .about-flow__step::before {
  display: block;
  margin-bottom: 6px;
  content: "0" counter(flow);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gold-500);
}

.page-about .about-flow__step h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  color: var(--ink-900);
}

.page-about .about-flow__step p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-600);
}

/* ---------- 旁注 ---------- */
.page-about .about-note {
  margin-top: 6px;
  padding: 18px 20px;
  background: var(--ink-900);
  border-left: 3px solid var(--gold-500);
  border-radius: var(--radius);
}

.page-about .about-note__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold-500);
  text-transform: uppercase;
}

.page-about .about-note p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-ink-soft);
}

/* ---------- 团队名单 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 1px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-roles > li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 16px;
  padding: 15px 18px;
  background: var(--cream-050);
}

.page-about .about-roles__num {
  font-size: 20px;
  line-height: 1.2;
  color: var(--gold-500);
}

.page-about .about-roles__body {
  min-width: 0;
}

.page-about .about-roles h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  color: var(--ink-900);
}

.page-about .about-roles p {
  margin: 5px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-600);
}

/* ---------- 复核周期 ---------- */
.page-about .about-cycles {
  display: grid;
  gap: 14px;
  margin-top: 4px;
}

.page-about .about-cycle {
  position: relative;
  padding: 20px 22px 18px;
  background: var(--cream-100);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
}

.page-about .about-cycle::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--celadon-500);
}

.page-about .about-cycle:nth-child(2)::before {
  background: var(--coral-500);
}

.page-about .about-cycle__freq {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold-500);
}

.page-about .about-cycle h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--ink-900);
}

.page-about .about-cycle p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--brown-900);
}

.page-about .about-cycle__meta {
  padding-top: 10px;
  border-top: 1px solid var(--hairline);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate-600);
}

/* ---------- 引文 ---------- */
.page-about .about-quote {
  margin: 8px 0 0;
  padding: clamp(22px, 3vw, 34px) 0;
  border-top: 1px solid var(--gold-line);
  border-bottom: 1px solid var(--gold-line);
}

.page-about .about-quote p {
  margin: 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.6;
  color: var(--ink-900);
}

.page-about .about-quote__mark {
  background-image: linear-gradient(var(--gold-500), var(--gold-500));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 2px;
  transition: background-size .55s var(--ease);
}

.page-about .about-quote:hover .about-quote__mark,
.page-about .about-quote:focus-within .about-quote__mark {
  background-size: 100% 2px;
}

.page-about .about-quote footer {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate-600);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-next {
  background: var(--ink-900);
  color: var(--on-ink);
  padding: clamp(48px, 6vw, 84px) 0;
}

.page-about .about-next__eyebrow,
.page-about .about-next .eyebrow {
  margin: 0;
  color: var(--gold-500);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
}

.page-about .about-next__title {
  margin: 12px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.28;
  color: var(--on-ink);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-next__card {
  display: block;
  padding: 20px 22px 22px;
  background: var(--ink-700);
  border: 1px solid rgba(216, 162, 63, .28);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--on-ink);
  transition: border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}

.page-about .about-next__card:hover {
  background: var(--ink-500);
  border-color: var(--gold-500);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-about .about-next__index {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold-500);
}

.page-about .about-next__card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--on-ink);
}

.page-about .about-next__card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--on-ink-soft);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__figure img {
    aspect-ratio: 8 / 3;
  }
}

@media (min-width: 800px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 860px) {
  .page-about .about-cycles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .chapter__body--split {
    max-width: none;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(24px, 3.5vw, 48px);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: minmax(150px, 200px) minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 78px);
  }

  .page-about .about-index {
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 14px;
    padding: 0 0 0 16px;
    border-top: 0;
    border-left: 1px solid var(--hairline-strong);
  }

  .page-about .about-figure--map {
    max-width: 640px;
  }

  .page-about .about-note {
    max-width: 640px;
  }
}