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

.page-about a {
  color: var(--gold-soft);
  text-decoration: underline;
  text-decoration-color: rgba(240, 210, 140, 0.4);
  text-underline-offset: 3px;
}

.page-about a:hover {
  color: var(--gold);
  text-decoration-color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: calc(var(--header-h) + 56px);
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line-faint);
  background:
    radial-gradient(120% 90% at 12% 0%, rgba(179, 32, 43, 0.22), transparent 62%),
    radial-gradient(90% 70% at 92% 10%, rgba(46, 156, 140, 0.12), transparent 60%);
}

.page-about .about-hero-grid {
  display: grid;
  gap: 32px;
  margin-top: 26px;
}

.page-about .about-title-in {
  color: var(--gold);
}

.page-about .about-hero-main .lead {
  max-width: 34em;
  color: var(--paper);
  margin-top: 20px;
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line-faint);
  align-self: end;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 18px 16px;
  background: var(--ink-2);
}

.page-about .about-fact-num {
  font-family: var(--mono);
  font-size: 1.375rem;
  line-height: 1.1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.page-about .about-fact-label {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--mist);
  letter-spacing: 0.02em;
}

/* ---------- 双栏主体 ---------- */
.page-about .about-grid {
  display: grid;
  gap: 36px;
  padding-top: 48px;
  padding-bottom: 80px;
}

.page-about .about-toc-label {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--mist);
  margin: 0 0 12px;
}

.page-about .about-toc-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-toc-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  font-size: 0.8125rem;
  line-height: 1.3;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--line-faint);
  background: var(--ink-2);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-toc-link:hover {
  color: var(--paper);
  border-color: var(--line-strong);
  text-decoration: none;
}

.page-about .about-toc-no {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--gold);
}

.page-about .about-toc-link[aria-current="true"] {
  color: var(--paper);
  border-color: var(--saffron);
  background: var(--wine);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding-bottom: 56px;
  margin-bottom: 56px;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-sec:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-sec-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .sec-no {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  padding: 4px 6px;
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--gold);
  border: 1px solid var(--line-strong);
}

.page-about .sec-no--light {
  color: var(--gold-soft);
  border-color: rgba(240, 210, 140, 0.55);
}

.page-about .about-h2 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.2vw, 2.1rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0;
}

.page-about .about-sec-body p {
  max-width: 36em;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(243, 234, 220, 0.9);
  margin: 0 0 18px;
}

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

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure .media-frame {
  border: 1px solid var(--line-strong);
  overflow: hidden;
}

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

.page-about .media-caption {
  margin-top: 10px;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--mist);
  letter-spacing: 0.02em;
}

/* ---------- 规则评审 ---------- */
.page-about .about-rule-list {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-faint);
  border: 1px solid var(--line);
}

.page-about .about-rule-list li {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: var(--ink-2);
  transition: background 200ms var(--ease);
}

.page-about .about-rule-list li:hover {
  background: var(--wine);
}

.page-about .about-rule-key {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1rem;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .about-rule-text {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(243, 234, 220, 0.86);
}

/* ---------- 段位阶梯 ---------- */
.page-about .about-ladder {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 5px;
  list-style: none;
  margin: 26px 0;
  padding: 0;
}

.page-about .ladder-step {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 8px;
  padding: 10px 2px 12px;
  background: var(--ink-2);
  border: 1px solid var(--line-faint);
  text-align: center;
}

.page-about .ladder-bar {
  display: block;
  background: linear-gradient(180deg, var(--gold-soft), var(--saffron));
  opacity: 0.9;
}

.page-about .ladder-step:nth-child(1) .ladder-bar { height: 10px; }
.page-about .ladder-step:nth-child(2) .ladder-bar { height: 18px; }
.page-about .ladder-step:nth-child(3) .ladder-bar { height: 26px; }
.page-about .ladder-step:nth-child(4) .ladder-bar { height: 34px; }
.page-about .ladder-step:nth-child(5) .ladder-bar { height: 42px; }
.page-about .ladder-step:nth-child(6) .ladder-bar { height: 50px; }
.page-about .ladder-step:nth-child(7) .ladder-bar { height: 60px; }

.page-about .ladder-name {
  font-size: 0.75rem;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-note-line {
  padding-left: 14px;
  border-left: 2px solid var(--turq);
  color: rgba(243, 234, 220, 0.86) !important;
  font-size: 0.9375rem !important;
}

/* ---------- 团队斜切带 ---------- */
.page-about .about-team-band {
  position: relative;
  margin-bottom: 56px;
  padding: 56px 20px 36px;
  background: linear-gradient(160deg, var(--wine), var(--ink-3) 78%);
  clip-path: polygon(0 26px, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-team-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .about-team-lead {
  max-width: 34em;
  margin: 0 0 26px;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(243, 234, 220, 0.88);
}

.page-about .about-team-table {
  display: grid;
  gap: 1px;
  background: rgba(240, 210, 140, 0.24);
  border-top: 1px solid rgba(240, 210, 140, 0.32);
  border-bottom: 1px solid rgba(240, 210, 140, 0.32);
}

.page-about .about-team-cell {
  padding: 20px 0;
  transition: background 200ms var(--ease);
}

.page-about .about-team-cell:hover {
  background: rgba(12, 21, 38, 0.42);
}

.page-about .about-team-num {
  display: block;
  font-family: var(--mono);
  font-size: 2.4rem;
  line-height: 1;
  color: var(--gold-soft);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.page-about .about-team-name {
  margin: 10px 0 8px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1rem;
  color: var(--paper);
  letter-spacing: 0.04em;
}

.page-about .about-team-cell p {
  margin: 0;
  max-width: 26em;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(243, 234, 220, 0.8);
}

.page-about .about-team-foot {
  margin: 26px 0 0;
  max-width: 40em;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(217, 168, 78, 0.18));
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 28px 28px;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-mark {
  position: absolute;
  left: 0;
  top: 7px;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.page-about .tl-item:first-child .tl-mark {
  background: var(--gold);
}

.page-about .tl-stage {
  display: block;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--gold);
  margin-bottom: 6px;
}

.page-about .tl-title {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-about .tl-item p {
  max-width: 32em;
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(243, 234, 220, 0.82);
}

/* ---------- 社群与公约 ---------- */
.page-about .about-pacts {
  display: grid;
  gap: 1px;
  margin: 26px 0;
  background: var(--line-faint);
  border: 1px solid var(--line);
}

.page-about .about-pact {
  padding: 18px;
  background: var(--ink-2);
  border-left: 2px solid var(--turq);
}

.page-about .about-pact-name {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1rem;
  color: var(--turq);
  letter-spacing: 0.04em;
}

.page-about .about-pact p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(243, 234, 220, 0.85);
}

.page-about .about-tail {
  margin-top: 22px !important;
  padding-top: 18px;
  border-top: 1px solid var(--line-faint);
  font-size: 0.9375rem !important;
  color: var(--mist) !important;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-team-band {
    padding: 64px 32px 40px;
  }

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

  .page-about .about-team-cell {
    padding: 22px 22px 22px 0;
    border-right: 1px solid rgba(240, 210, 140, 0.18);
  }

  .page-about .about-team-cell:nth-child(2) {
    padding-left: 22px;
  }

  .page-about .about-team-cell:nth-child(3) {
    padding-left: 22px;
    border-right: 0;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-sec-body p {
    font-size: 1.0625rem;
  }

  .page-about .about-figure--inset {
    max-width: 720px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-grid {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 64px;
    padding-top: 64px;
    padding-bottom: 104px;
  }

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

  .page-about .about-toc-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    border-left: 1px solid var(--line-faint);
  }

  .page-about .about-toc-link {
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    margin-left: -1px;
    padding: 8px 4px 8px 12px;
    font-size: 0.875rem;
  }

  .page-about .about-toc-link:hover {
    border-left-color: var(--line-strong);
  }

  .page-about .about-toc-link[aria-current="true"] {
    background: transparent;
    border-left-color: var(--saffron);
    color: var(--paper);
  }

  .page-about .about-team-band {
    padding: 72px 44px 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc-link,
  .page-about .about-rule-list li,
  .page-about .about-team-cell {
    transition: none;
  }
}