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

/* ---------- 首屏 ---------- */

.page-about .about-masthead {
  position: relative;
  padding: clamp(1.75rem, 5vw, 3.25rem) 0 clamp(2.25rem, 6vw, 4rem);
  overflow: hidden;
}

.page-about .about-masthead::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: min(640px, 82vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 42% 42%, rgba(75, 46, 131, 0.15), rgba(75, 46, 131, 0) 68%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-masthead .canvas {
  position: relative;
  z-index: 1;
}

.page-about .about-title {
  margin: 0.75rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.4vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
  max-width: 20ch;
}

.page-about .about-title em {
  display: block;
  font-style: normal;
  color: var(--violet);
  border-bottom: 4px solid var(--gold);
  padding-bottom: 0.1em;
  width: fit-content;
  max-width: 100%;
}

.page-about .about-lede {
  margin-top: clamp(1.25rem, 3vw, 1.9rem);
  max-width: 62ch;
}

.page-about .about-lede p {
  margin: 0;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.9;
  color: #3b3350;
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: clamp(1.15rem, 2.6vw, 1.6rem) 0 0;
  border-top: 1px solid var(--line-gold);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about .fact-num {
  font-size: clamp(1.45rem, 4vw, 2.05rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--violet);
}

.page-about .fact-cap {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--mauve);
}

/* ---------- 区块通用 ---------- */

.page-about .about-stage,
.page-about .about-team,
.page-about .about-list,
.page-about .about-scenes,
.page-about .about-almanac,
.page-about .about-collab {
  padding: clamp(2.5rem, 7vw, 4.5rem) 0;
}

.page-about .stage-intro,
.page-about .scenes-intro {
  margin: clamp(0.9rem, 2vw, 1.25rem) 0 0;
  max-width: 66ch;
  font-size: 1rem;
  line-height: 1.9;
  color: #3b3350;
}

.page-about .tl-figure,
.page-about .issue-figure,
.page-about .scene-figure {
  margin-left: 0;
  margin-right: 0;
}

.page-about .figure-cap {
  color: var(--mauve);
}

/* ---------- 01 时间轴 ---------- */

.page-about .tl-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: clamp(1.25rem, 3vw, 2rem) 0 clamp(1.85rem, 4vw, 2.5rem);
}

.page-about .tl-jump a {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--line-gold);
  background: var(--ivory);
  color: var(--violet);
  text-decoration: none;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.page-about .tl-jump a:hover,
.page-about .tl-jump a:focus-visible {
  background: var(--violet);
  border-color: var(--violet);
  color: var(--gold-soft);
}

.page-about .timeline {
  --tl-pad: 2rem;
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--tl-pad);
  border-left: 1px solid var(--line-gold);
  display: flex;
  flex-direction: column;
  gap: clamp(2.25rem, 5vw, 3.25rem);
}

.page-about .tl-item {
  position: relative;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 0.55rem;
  left: calc(-1 * var(--tl-pad) - 5px);
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px var(--cream);
}

.page-about .tl-item:last-child::before {
  background: var(--vermilion);
}

.page-about .tl-year {
  margin: 0 0 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-about .tl-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .tl-text {
  margin-top: 0.7rem;
  max-width: 64ch;
}

.page-about .tl-text p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.95;
  color: #3b3350;
}

.page-about .tl-figure {
  margin-top: 1.35rem;
  max-width: 660px;
}

/* ---------- 02 团队 ---------- */

.page-about .about-team {
  background: var(--ivory);
}

.page-about .role-grid {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(0.9rem, 2.2vw, 1.4rem);
}

.page-about .role-card {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  border-radius: var(--radius-md);
  background: var(--cream);
  border: 1px solid var(--line);
}

.page-about .role-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 39, 0));
}

.page-about .role-num {
  display: block;
  margin-bottom: 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--mauve);
}

.page-about .role-card h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.0875rem;
  font-weight: 700;
  color: var(--violet);
}

.page-about .role-card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: #3b3350;
}

.page-about .verify-plate {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  padding: clamp(1.4rem, 3.6vw, 2.15rem);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--ink) 0%, var(--violet-deep) 100%);
  color: var(--gold-soft);
}

.page-about .verify-plate h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  font-weight: 700;
  color: var(--ivory);
}

.page-about .verify-steps {
  list-style: none;
  margin: 1.15rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .verify-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  align-items: start;
}

.page-about .verify-steps .step-num {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  padding-top: 0.25rem;
}

.page-about .verify-steps p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(233, 217, 164, 0.88);
}

/* ---------- 03 服务清单 ---------- */

.page-about .list-layout {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-about .issue-track {
  display: grid;
  gap: clamp(0.9rem, 2.2vw, 1.25rem);
}

.page-about .issue {
  padding: clamp(1.1rem, 2.6vw, 1.5rem) clamp(1.1rem, 2.6vw, 1.6rem);
  border-radius: var(--radius-md);
  background: var(--ivory);
  border: 1px solid var(--line);
  border-left: 4px solid var(--gold);
}

.page-about .issue--latest {
  border-left-color: var(--vermilion);
  background: linear-gradient(180deg, rgba(178, 58, 46, 0.055), rgba(178, 58, 46, 0));
}

.page-about .issue-no {
  display: inline-block;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--violet);
  background: rgba(75, 46, 131, 0.08);
}

.page-about .issue--latest .issue-no {
  color: var(--vermilion);
  background: rgba(178, 58, 46, 0.1);
}

.page-about .issue h3 {
  margin: 0.7rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .issue p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: #3b3350;
}

.page-about .issue-figure {
  margin-top: 0;
}

/* ---------- 04 场景 ---------- */

.page-about .about-scenes {
  background: linear-gradient(160deg, var(--ink) 0%, var(--felt) 100%);
  color: var(--ivory);
}

.page-about .about-scenes .section-idx {
  color: var(--gold);
}

.page-about .about-scenes .section-title {
  color: var(--ivory);
}

.page-about .scenes-intro {
  color: rgba(247, 241, 228, 0.8);
}

.page-about .scene-grid {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(0.9rem, 2.2vw, 1.4rem);
}

.page-about .scene {
  padding: clamp(1.15rem, 2.8vw, 1.6rem);
  border-radius: var(--radius-md);
  background: rgba(255, 251, 243, 0.06);
  border: 1px solid rgba(201, 162, 39, 0.28);
}

.page-about .scene h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gold-soft);
}

.page-about .scene p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(247, 241, 228, 0.82);
}

.page-about .scene-figure {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-about .about-scenes .figure-cap {
  color: rgba(233, 217, 164, 0.7);
}

.page-about .scene-note {
  margin: clamp(1.35rem, 3vw, 1.85rem) 0 0;
  padding-left: 1.1rem;
  border-left: 2px solid var(--gold);
  max-width: 68ch;
  font-size: 0.95rem;
  line-height: 1.9;
  color: rgba(233, 217, 164, 0.9);
}

/* ---------- 05 年度汇编 ---------- */

.page-about .almanac-plate {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-radius: var(--radius-lg);
  background: var(--ivory);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-about .almanac-plate .prose p {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.95;
  color: #3b3350;
}

.page-about .almanac-plate .prose p:last-child {
  margin-bottom: 0;
}

.page-about .almanac-marks {
  list-style: none;
  margin: 0;
  padding: clamp(1rem, 2.4vw, 1.4rem) 0 0;
  border-top: 1px solid var(--line-gold);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(1rem, 2.4vw, 1.5rem);
}

.page-about .almanac-marks li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about .mark-num {
  font-size: clamp(1.3rem, 3.4vw, 1.8rem);
  font-weight: 600;
  line-height: 1;
  color: var(--violet);
}

.page-about .mark-cap {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--mauve);
}

/* ---------- 06 合作 ---------- */

.page-about .about-collab {
  background: linear-gradient(150deg, var(--violet-deep) 0%, var(--violet) 100%);
  color: var(--ivory);
}

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

.page-about .about-collab .section-title {
  color: var(--ivory);
}

.page-about .collab-lede {
  margin: clamp(0.9rem, 2vw, 1.25rem) 0 0;
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(247, 241, 228, 0.85);
}

.page-about .collab-list {
  list-style: none;
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(0.9rem, 2.2vw, 1.4rem);
}

.page-about .collab-list li {
  padding: clamp(1rem, 2.6vw, 1.4rem);
  border-radius: var(--radius-md);
  background: rgba(255, 251, 243, 0.07);
  border: 1px solid rgba(201, 162, 39, 0.3);
}

.page-about .collab-list h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gold-soft);
}

.page-about .collab-list p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(247, 241, 228, 0.82);
}

.page-about .collab-actions {
  margin-top: clamp(1.5rem, 3.5vw, 2.25rem);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .scene-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .collab-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .timeline {
    --tl-pad: 3.25rem;
  }

  .page-about .list-layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .issue-figure {
    position: sticky;
    top: calc(var(--topbar-h) + 1.5rem);
  }

  .page-about .almanac-plate {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .almanac-marks {
    border-top: 0;
    padding-top: 0;
    border-left: 1px solid var(--line-gold);
    padding-left: clamp(1.25rem, 3vw, 2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-jump a {
    transition: none;
  }
}