.page-about {
  --about-rail-w: 216px;
  --about-split-gap: 52px;
  --about-hair: rgba(154, 163, 160, 0.24);
  --about-ink-soft: rgba(14, 43, 38, 0.72);
  background: var(--ink-green);
  color: var(--paper);
  overflow-x: hidden;
}

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

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 48px) 0 60px;
  background: var(--ink-green);
}

.page-about .about-hero-media,
.page-about .about-hero-veil {
  position: absolute;
  inset: 0;
}

.page-about .about-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  filter: saturate(0.6) contrast(1.05);
}

.page-about .about-hero-veil {
  background:
    linear-gradient(180deg, rgba(7, 19, 16, 0.92) 0%, rgba(14, 43, 38, 0.76) 42%, rgba(14, 43, 38, 0.98) 100%),
    repeating-linear-gradient(90deg, rgba(154, 163, 160, 0.09) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(154, 163, 160, 0.06) 0 1px, transparent 1px 96px);
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 34px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--archive);
}

.page-about .about-hero .breadcrumb-item a {
  color: var(--archive);
  text-decoration: none;
}

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

.page-about .about-hero .breadcrumb-item[aria-current="page"] {
  color: var(--paper);
}

.page-about .about-hero .eyebrow {
  color: var(--gold);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  max-width: 20ch;
  font-size: clamp(2.1rem, 6.6vw, 4.7rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-lede {
  margin: 26px 0 0;
  max-width: 62ch;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: rgba(244, 241, 232, 0.82);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: 40px 0 0;
  padding: 24px 0 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .stat-label {
  font-size: 0.875rem;
  color: var(--archive);
}

.page-about .about-hero-years {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .year-chip {
  display: inline-block;
  padding: 9px 16px;
  border: 2px solid rgba(227, 178, 60, 0.42);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-about .year-chip:hover {
  background: var(--gold);
  color: var(--deep-black-green);
}

/* ---------- 年份刻度 + 叙述 ---------- */

.page-about .about-eras {
  background: var(--night-blue);
  color: var(--paper);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-rail-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--whistle);
}

.page-about .era-rail-list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .era-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 148px;
  padding: 12px 14px;
  border: 2px solid var(--about-hair);
  background: rgba(16, 27, 46, 0.6);
  text-decoration: none;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .era-link:hover {
  border-color: var(--gold);
  background: rgba(227, 178, 60, 0.12);
}

.page-about .era-link-year {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .era-link-note {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--archive);
}

.page-about .about-main .section-head {
  margin-bottom: 34px;
}

.page-about .about-main h2 {
  margin: 12px 0 0;
  font-size: clamp(1.55rem, 4.4vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-main .lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(244, 241, 232, 0.76);
}

.page-about .era-item {
  padding: 0 0 0 20px;
  margin: 0 0 34px;
  border-left: 2px solid var(--line-gold);
}

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

.page-about .era-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.6vw, 2.2rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .era-title {
  margin: 12px 0 0;
  font-size: 1.125rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .era-text {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(244, 241, 232, 0.72);
}

/* ---------- 图片框 ---------- */

.page-about .about-frame {
  position: relative;
  margin: 0 0 34px;
  padding: 0;
  border: 2px solid var(--about-hair);
  background: var(--deep-black-green);
  overflow: hidden;
}

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

.page-about .about-frame[data-ratio="21x9"] img {
  aspect-ratio: 21 / 9;
}

.page-about .about-frame[data-ratio="4x3"] img {
  aspect-ratio: 4 / 3;
}

.page-about .about-cap {
  margin: 0;
  padding: 10px 14px;
  border-top: 1px solid var(--about-hair);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--archive);
}

/* ---------- 纸白层 ---------- */

.page-about .about-paper {
  background: var(--paper);
  color: var(--ink-green);
}

.page-about .about-paper h2 {
  margin: 12px 0 0;
  font-size: clamp(1.55rem, 4.6vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink-green);
}

.page-about .about-paper .lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-paper .eyebrow.on-dark-ink {
  color: var(--whistle);
}

.page-about .about-paper .about-cap {
  color: var(--about-ink-soft);
}

/* 三条战线 */

.page-about .about-lines {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 40px;
}

.page-about .line-card {
  position: relative;
  padding: 26px 22px 24px;
  border: 2px solid rgba(14, 43, 38, 0.16);
  background: rgba(255, 255, 255, 0.62);
}

.page-about .line-card::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 52px;
  height: 4px;
  background: var(--gold);
}

.page-about .line-tag {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--whistle);
}

.page-about .line-title {
  margin: 0;
  font-size: 1.1875rem;
  line-height: 1.4;
  color: var(--ink-green);
}

.page-about .line-text {
  margin: 12px 0 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

/* 归整方式 + 纪律 */

.page-about .about-grid-two {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 46px;
}

.page-about .sub-title {
  margin: 0 0 18px;
  font-size: 1.0625rem;
  letter-spacing: 0.02em;
  color: var(--ink-green);
}

.page-about .about-bullets {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(14, 43, 38, 0.16);
}

.page-about .about-bullets li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid rgba(14, 43, 38, 0.12);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .bullet-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--whistle);
}

.page-about .about-discipline {
  align-self: start;
  padding: 24px 22px;
  border: 2px solid rgba(14, 43, 38, 0.18);
  background: rgba(227, 178, 60, 0.12);
}

.page-about .about-discipline .tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .discipline-title {
  margin: 14px 0 0;
  font-size: 1.25rem;
  color: var(--ink-green);
}

.page-about .discipline-text {
  margin: 12px 0 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .discipline-note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  color: var(--archive);
}

.page-about .about-paper .discipline-note a {
  color: var(--whistle);
  text-decoration: underline;
}

/* 收藏 */

.page-about .about-keep {
  margin-top: 46px;
  padding: 28px 24px;
  border-left: 4px solid var(--gold);
  background: rgba(14, 43, 38, 0.06);
}

.page-about .keep-title {
  margin: 0;
  font-size: 1.25rem;
  color: var(--ink-green);
}

.page-about .keep-text {
  margin: 12px 0 20px;
  max-width: 64ch;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  background: var(--ink-green);
  color: var(--paper);
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .team-frame {
  margin: 0;
  border-color: rgba(227, 178, 60, 0.28);
  background: var(--deep-black-green);
}

.page-about .team-copy h2 {
  margin: 12px 0 0;
  font-size: clamp(1.5rem, 4.4vw, 2.5rem);
  line-height: 1.12;
  color: var(--paper);
}

.page-about .team-copy .lede {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(244, 241, 232, 0.76);
}

.page-about .team-copy .eyebrow {
  color: var(--gold);
}

.page-about .about-team-strip {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: 34px;
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .team-role {
  padding: 22px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .team-role:last-child {
  border-bottom: 0;
}

.page-about .role-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 2rem;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .role-name {
  margin: 10px 0 0;
  font-size: 1rem;
  color: var(--paper);
}

.page-about .role-desc {
  margin: 8px 0 0;
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--archive);
}

.page-about .team-total {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: var(--gold-soft);
}

/* ---------- 协作 ---------- */

.page-about .about-collab {
  background: var(--night-blue);
  color: var(--paper);
}

.page-about .about-collab h2 {
  margin: 12px 0 0;
  font-size: clamp(1.5rem, 4.4vw, 2.5rem);
  line-height: 1.12;
  color: var(--paper);
}

.page-about .about-collab .lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(244, 241, 232, 0.76);
}

.page-about .about-collab .eyebrow {
  color: var(--gold);
}

.page-about .about-collab-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-top: 44px;
}

.page-about .collab-figure {
  margin: 0;
  padding: 16px;
  border: 2px solid var(--about-hair);
  background: rgba(16, 27, 46, 0.55);
}

.page-about .collab-map {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .collab-map text {
  font-family: var(--font-sans);
  font-size: 14px;
  text-anchor: middle;
  fill: var(--archive);
}

.page-about .collab-edges line {
  stroke: rgba(227, 178, 60, 0.42);
  stroke-width: 1.5;
  stroke-dasharray: 5 7;
}

.page-about .collab-hub circle {
  fill: none;
  stroke: var(--gold);
  stroke-width: 2;
}

.page-about .collab-map .collab-hub-name {
  font-size: 19px;
  font-weight: 700;
  fill: var(--paper);
}

.page-about .collab-map .collab-hub-sub {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--gold);
}

.page-about .collab-leaf circle {
  fill: var(--turf);
  transition: fill 0.2s ease;
}

.page-about .collab-leaf:hover circle {
  fill: var(--gold);
}

.page-about .collab-map .collab-leaf-num {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: var(--gold-soft);
}

.page-about .collab-figure .about-cap {
  border-top-color: var(--about-hair);
  color: var(--archive);
}

.page-about .collab-points {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .collab-point {
  padding-left: 18px;
  border-left: 2px solid rgba(31, 111, 92, 0.7);
}

.page-about .point-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .point-title {
  margin: 10px 0 0;
  font-size: 1.0625rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .point-text {
  margin: 10px 0 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(244, 241, 232, 0.72);
}

/* ---------- 更新节奏 ---------- */

.page-about .about-rhythm {
  background: var(--ink-green);
  color: var(--paper);
}

.page-about .about-rhythm h2 {
  margin: 12px 0 0;
  font-size: clamp(1.5rem, 4.4vw, 2.5rem);
  line-height: 1.12;
  color: var(--paper);
}

.page-about .about-rhythm .lede {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(244, 241, 232, 0.76);
}

.page-about .about-rhythm .eyebrow {
  color: var(--gold);
}

.page-about .rhythm-list {
  display: grid;
  grid-template-columns: 1fr;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .rhythm-item {
  position: relative;
  padding: 0 0 30px 26px;
  border-left: 2px solid var(--about-hair);
}

.page-about .rhythm-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .rhythm-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--turf);
}

.page-about .rhythm-item.is-now::before {
  background: var(--whistle);
  box-shadow: 0 0 0 5px rgba(242, 107, 42, 0.18);
}

.page-about .rhythm-time {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .rhythm-item.is-now .rhythm-time {
  color: var(--whistle);
}

.page-about .rhythm-title {
  margin: 10px 0 0;
  font-size: 1.0625rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .rhythm-text {
  margin: 8px 0 0;
  max-width: 52ch;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(244, 241, 232, 0.72);
}

/* ---------- 入口 ---------- */

.page-about .entry-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 40px;
}

.page-about .entry-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px;
  border: 2px solid rgba(14, 43, 38, 0.16);
  background: rgba(255, 255, 255, 0.62);
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

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

.page-about .entry-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--whistle);
}

.page-about .entry-title {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.45;
  color: var(--ink-green);
}

.page-about .entry-text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .entry-go {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid rgba(14, 43, 38, 0.14);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--turf);
}

.page-about .entry-card:hover .entry-go {
  color: var(--whistle);
}

.page-about .entries-foot {
  margin: 30px 0 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .entries-foot a {
  color: var(--whistle);
  text-decoration: underline;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .about-lines {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .entry-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-team-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .team-role {
    padding: 24px 20px;
    border-bottom: 0;
    border-left: 1px solid var(--about-hair);
  }

  .page-about .team-role:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .collab-points {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 72px);
    padding-bottom: 84px;
  }

  .page-about .about-split {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-split-gap);
    align-items: start;
  }

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

  .page-about .era-rail-list {
    flex-direction: column;
    gap: 12px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .era-link {
    min-width: 0;
  }

  .page-about .about-lines {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-grid-two {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-collab-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .collab-points {
    grid-template-columns: 1fr;
  }

  .page-about .rhythm-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .rhythm-item {
    padding: 30px 22px 0 0;
    border-left: 0;
    border-top: 2px solid var(--about-hair);
  }

  .page-about .rhythm-item:last-child {
    border-top-color: var(--about-hair);
  }

  .page-about .rhythm-item::before {
    left: 0;
    top: -7px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .year-chip,
  .page-about .era-link,
  .page-about .collab-leaf circle,
  .page-about .entry-card {
    transition: none;
  }

  .page-about .entry-card:hover {
    transform: none;
  }
}