.page-about {
  --about-rail: 236px;
  padding-top: calc(var(--header-h) + 10px);
  background-color: var(--fabric);
  background-image:
    radial-gradient(120% 78% at 88% 0%, rgba(201, 162, 39, 0.13), transparent 56%),
    radial-gradient(100% 68% at 4% 24%, rgba(27, 74, 60, 0.55), transparent 62%),
    radial-gradient(90% 58% at 50% 100%, rgba(20, 56, 45, 0.5), transparent 66%);
}

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

.page-about .breadcrumbs {
  padding-top: 6px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 3.2vw, 38px) 0 clamp(34px, 5vw, 60px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 44px);
}

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

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--gold-bright);
}

.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(31px, 5.1vw, 56px);
  line-height: 1.11;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 52ch;
  font-size: clamp(15.5px, 1.5vw, 17.5px);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--hair);
  list-style: none;
}

.page-about .about-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__label {
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--text-dim);
}

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

.page-about .about-hero__figure .figure__media {
  border: 1px solid var(--hair);
  border-radius: 3px;
  overflow: hidden;
  background: var(--card);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.38);
}

.page-about .figure__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--text-dim);
}

/* ---------- 双栏骨架 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 48px);
  padding-top: clamp(28px, 4.4vw, 54px);
  padding-bottom: clamp(46px, 6vw, 86px);
}

@media (min-width: 1040px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 左侧版本刻度 ---------- */

.page-about .about-rail {
  border: 1px solid var(--hair);
  border-radius: 3px;
  background: linear-gradient(180deg, rgba(20, 56, 45, 0.92), rgba(14, 43, 35, 0.68));
  padding: 16px 18px 18px;
  min-width: 0;
}

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__item {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 10px 12px;
  border: 1px solid var(--hair);
  border-radius: 2px;
  background: rgba(18, 17, 15, 0.22);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-rail__item:hover {
  border-color: var(--gold-hair);
  transform: translateY(-2px);
}

.page-about .about-rail__year {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .about-rail__vers {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.page-about .about-rail__chip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--gold-bright);
  border: 1px solid var(--gold-hair);
  border-radius: 2px;
  padding: 1px 5px;
  background: rgba(201, 162, 39, 0.07);
}

.page-about .about-rail__foot {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

@media (min-width: 1040px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    padding: 20px 18px 20px 16px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__item {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px;
    padding: 11px 4px 11px 14px;
    border: 0;
    border-left: 2px solid rgba(244, 239, 228, 0.14);
    border-radius: 0;
    background: transparent;
    transition: border-color 0.18s ease, background-color 0.18s ease;
  }

  .page-about .about-rail__item:hover {
    border-left-color: var(--gold);
    background: rgba(201, 162, 39, 0.08);
    transform: none;
  }
}

/* ---------- 阅读流 ---------- */

.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(30px, 4.4vw, 58px);
  min-width: 0;
}

.page-about .about-block {
  min-width: 0;
  padding-top: clamp(4px, 0.8vw, 10px);
}

@media (min-width: 1040px) {
  .page-about .about-block {
    padding-left: clamp(4px, 1.6vw, 22px);
  }
}

.page-about .about-block__no {
  display: inline-block;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--gold-bright);
  border: 1px solid var(--gold-hair);
  border-radius: 2px;
  padding: 5px 10px;
  background: rgba(201, 162, 39, 0.08);
}

.page-about .about-block__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.22;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-about .about-block__lead {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: clamp(16px, 1.65vw, 18px);
  line-height: 1.78;
  color: rgba(244, 239, 228, 0.92);
}

.page-about .about-block__body p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text-soft);
}

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

.page-about .about-block__note {
  margin: 20px 0 0;
  max-width: 66ch;
  padding: 14px 16px;
  border-left: 2px solid var(--cinnabar);
  border-radius: 0 3px 3px 0;
  background: rgba(178, 58, 46, 0.1);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .about-block__figure {
  margin: 24px 0 0;
  border: 1px solid var(--hair);
  border-radius: 3px;
  overflow: hidden;
  background: var(--card);
}

.page-about .about-block__figure .figure__caption {
  padding: 0 14px 12px;
  margin-top: 10px;
}

/* ---------- 编号示例卡 ---------- */

.page-about .about-sample {
  position: relative;
  margin-top: 24px;
  max-width: 470px;
  padding: 20px 22px 22px;
  border-radius: 3px;
  background: var(--paper);
  color: var(--ink);
  box-shadow:
    0 1px 0 rgba(18, 17, 15, 0.18),
    0 16px 34px rgba(0, 0, 0, 0.36);
}

.page-about .about-sample::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(18, 17, 15, 0.16);
  border-radius: 2px;
  pointer-events: none;
}

.page-about .about-sample__head {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(18, 17, 15, 0.22);
}

.page-about .about-sample__no {
  font-family: var(--font-mono);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .about-copy {
  font-family: var(--font-text);
  font-size: 12px;
  line-height: 1;
  padding: 7px 10px;
  border: 1px solid rgba(18, 17, 15, 0.3);
  border-radius: 2px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.page-about .about-copy:hover,
.page-about .about-copy:focus-visible {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.page-about .about-copy:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-about .about-sample__title {
  position: relative;
  z-index: 1;
  margin: 14px 0 10px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: rgba(18, 17, 15, 0.82);
}

.page-about .about-sample__meta {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-sample__meta li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 7px;
  border-bottom: 1px solid rgba(18, 17, 15, 0.09);
  font-size: 14px;
}

.page-about .about-sample__meta li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-sample__key {
  color: rgba(18, 17, 15, 0.62);
}

.page-about .about-sample__val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 22px;
}

@media (min-width: 680px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team__card {
  min-width: 0;
  padding: 18px 18px 20px;
  border: 1px solid var(--hair);
  border-radius: 3px;
  background: linear-gradient(180deg, rgba(27, 74, 60, 0.9), rgba(20, 56, 45, 0.72));
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-team__card:hover {
  border-color: var(--gold-hair);
  transform: translateY(-2px);
}

.page-about .about-team__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__role {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--text-soft);
}

/* ---------- 版本刻度 ---------- */

.page-about .about-versions {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.page-about .about-versions li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gold-bright);
  border: 1px solid var(--gold-hair);
  border-radius: 2px;
  padding: 5px 9px;
  background: rgba(201, 162, 39, 0.07);
  transition: background-color 0.16s ease, color 0.16s ease;
}

.page-about .about-versions li:hover {
  background: var(--gold);
  color: var(--ink);
}

/* ---------- 一日流程 ---------- */

.page-about .about-day {
  list-style: none;
  margin: 22px 0 0;
  padding: 0 0 0 20px;
  border-left: 1px solid var(--gold-hair);
  display: grid;
  gap: 22px;
}

.page-about .about-day__item {
  position: relative;
}

.page-about .about-day__item::before {
  content: "";
  position: absolute;
  left: -24.5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px var(--fabric);
}

.page-about .about-day__time {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold-bright);
}

.page-about .about-day__item p {
  margin: 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 底部导航块 ---------- */

.page-about .about-cta {
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--gold-hair);
  border-radius: 3px;
  background: linear-gradient(135deg, rgba(27, 74, 60, 0.92), rgba(14, 43, 35, 0.9));
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .about-cta__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

@media (min-width: 680px) {
  .page-about .about-cta__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 18px;
  }
}

.page-about .about-cta__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
  padding: 13px 14px;
  border: 1px solid var(--hair);
  border-radius: 2px;
  background: rgba(18, 17, 15, 0.22);
  color: var(--paper);
  font-size: 14.5px;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-cta__links a::after {
  content: "→";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  color: var(--gold);
  transition: transform 0.18s ease;
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  border-color: var(--gold);
  background: rgba(201, 162, 39, 0.1);
  transform: translateY(-2px);
}

.page-about .about-cta__links a:hover::after,
.page-about .about-cta__links a:focus-visible::after {
  transform: translateX(3px);
}

.page-about .about-cta__links a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ---------- 窄屏微调 ---------- */

@media (max-width: 560px) {
  .page-about .about-hero__stats {
    gap: 14px 24px;
  }

  .page-about .about-sample {
    padding: 18px 16px 20px;
  }

  .page-about .about-sample__meta li {
    gap: 10px;
  }

  .page-about .about-day {
    padding-left: 16px;
  }

  .page-about .about-day__item::before {
    left: -20.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__item,
  .page-about .about-team__card,
  .page-about .about-cta__links a,
  .page-about .about-cta__links a::after,
  .page-about .about-copy,
  .page-about .about-versions li {
    transition: none;
  }
}