.page-about {
  --about-rule: rgba(244, 241, 234, 0.12);
  --about-rule-soft: rgba(244, 241, 234, 0.07);
  --about-glass: rgba(21, 17, 38, 0.74);
  --about-rail-w: 92px;
  --about-anchor: calc(var(--bar-h) + 104px);
  background: var(--c-void);
  color: var(--c-paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(24px, 4vw, 40px) 0 clamp(32px, 5vw, 64px);
  border-bottom: 1px solid rgba(139, 92, 246, 0.3);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(820px 400px at 8% -12%, rgba(139, 92, 246, 0.32), transparent 70%),
    radial-gradient(640px 360px at 96% 4%, rgba(34, 211, 238, 0.16), transparent 72%),
    repeating-linear-gradient(90deg, rgba(139, 92, 246, 0.07) 0 1px, transparent 1px 96px);
  pointer-events: none;
}
.page-about .about-hero-inner {
  display: grid;
  gap: var(--sp-6);
  margin-top: clamp(20px, 3vw, 36px);
}
.page-about .eyebrow {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--c-cyan);
  text-transform: uppercase;
}
.page-about .about-hero h1 {
  margin: var(--sp-4) 0 var(--sp-5);
  font-family: var(--font-head);
  font-size: var(--fs-hero);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.035em;
  max-width: 17ch;
  color: var(--c-paper);
  background: linear-gradient(98deg, var(--c-paper) 34%, #c3adff 66%, var(--c-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-about .about-lede {
  margin: 0 0 var(--sp-4);
  max-width: 56ch;
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.78;
  color: var(--c-paper);
}
.page-about .about-lede-sub {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(0.9375rem, 1.2vw, 1.0625rem);
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.62);
}
.page-about .hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  overflow: hidden;
}
.page-about .hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--sp-4);
  background: rgba(11, 7, 20, 0.82);
}
.page-about .fact-num {
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  font-weight: 700;
  line-height: 1.05;
  color: var(--c-gold);
  letter-spacing: -0.02em;
}
.page-about .fact-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(244, 241, 234, 0.54);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-index {
  position: sticky;
  top: var(--bar-h);
  z-index: 6;
  background: rgba(11, 7, 20, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--about-rule);
}
.page-about .about-index-inner {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding-top: 10px;
  padding-bottom: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-index-inner::-webkit-scrollbar {
  display: none;
}
.page-about .idx-chapters,
.page-about .idx-years {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  flex: 0 0 auto;
}
.page-about .idx-chapters a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  color: rgba(244, 241, 234, 0.68);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-about .idx-chapters a:hover,
.page-about .idx-chapters a:focus-visible {
  color: var(--c-paper);
  border-color: rgba(139, 92, 246, 0.45);
  background: rgba(139, 92, 246, 0.12);
  outline: none;
}
.page-about .idx-num {
  font-size: 11px;
  color: var(--c-violet);
}
.page-about .idx-years {
  margin-left: auto;
}
.page-about .idx-years li + li::before {
  content: "·";
  margin-right: 6px;
  color: rgba(244, 241, 234, 0.28);
}
.page-about .idx-years a {
  font-family: var(--font-mono);
  font-size: 12px;
  text-decoration: none;
  color: rgba(34, 211, 238, 0.8);
  transition: color var(--dur) var(--ease);
}
.page-about .idx-years a:hover,
.page-about .idx-years a:focus-visible {
  color: var(--c-cyan);
  outline: none;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding: clamp(44px, 7vw, 96px) 0;
  border-bottom: 1px solid var(--about-rule-soft);
  scroll-margin-top: var(--about-anchor);
}
.page-about .about-chapter:last-of-type {
  border-bottom: 0;
}
.page-about .chapter-grid {
  display: grid;
  gap: var(--sp-4);
}
.page-about .chapter-rail {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.page-about .chapter-num {
  font-size: clamp(2.2rem, 6.5vw, 3.6rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: rgba(139, 92, 246, 0.2);
  -webkit-text-stroke: 1.4px rgba(139, 92, 246, 0.85);
}
.page-about .chapter-kicker {
  font-size: 10px;
  letter-spacing: 0.26em;
  color: rgba(244, 241, 234, 0.34);
  white-space: nowrap;
}
.page-about .chapter-main h2 {
  margin: 0 0 var(--sp-4);
  font-family: var(--font-head);
  font-size: var(--fs-h2);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}
.page-about .chapter-main h2::after {
  content: "";
  display: block;
  width: 56px;
  height: 2px;
  margin-top: var(--sp-4);
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-violet), var(--c-cyan));
}
.page-about .chapter-main p {
  margin: 0 0 var(--sp-4);
  max-width: 64ch;
  font-size: 1rem;
  line-height: 1.82;
  color: rgba(244, 241, 234, 0.74);
}
.page-about .chapter-lede {
  font-size: clamp(1.0625rem, 1.4vw, 1.15rem) !important;
  line-height: 1.75 !important;
  color: var(--c-paper) !important;
}
.page-about .chapter-main p:last-child {
  margin-bottom: 0;
}
.page-about .chapter-main h3 {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--c-paper);
}

/* ---------- 内联统计 ---------- */
.page-about .inline-stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin: var(--sp-5) 0 0;
  padding: 0;
}
.page-about .inline-stats li {
  padding: 10px 14px;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-sm);
  background: rgba(21, 17, 38, 0.6);
  font-size: 13px;
  color: rgba(244, 241, 234, 0.72);
}
.page-about .inline-stats .mono {
  margin-right: 7px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-gold);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: var(--sp-5) 0 var(--sp-6);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure--narrow {
  max-width: 460px;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  list-style: none;
  margin: var(--sp-6) 0 0;
  padding: 4px 0 4px 32px;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-violet), var(--c-cyan));
  opacity: 0.6;
}
.page-about .tl-item {
  position: relative;
  padding-bottom: var(--sp-5);
  scroll-margin-top: var(--about-anchor);
}
.page-about .tl-item:last-child {
  padding-bottom: 0;
}
.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 12px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-void);
  border: 2px solid var(--c-cyan);
  box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.1);
}
.page-about .tl-year {
  display: block;
  margin-bottom: 6px;
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c-gold);
}
.page-about .tl-card {
  padding: var(--sp-4);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  background: var(--about-glass);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .tl-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.7);
  max-width: 62ch;
}
.page-about .tl-item:hover .tl-card,
.page-about .tl-item:focus-within .tl-card {
  border-color: rgba(34, 211, 238, 0.45);
  transform: translateX(4px);
  box-shadow: var(--glow-c);
}
.page-about .tl-item:target .tl-card {
  border-color: var(--c-cyan);
  box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.5), var(--glow-c);
}

/* ---------- 团队展签 ---------- */
.page-about .team-plates {
  display: grid;
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}
.page-about .team-plate {
  position: relative;
  padding: var(--sp-5);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  background: rgba(21, 17, 38, 0.68);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-about .team-plate::before {
  content: "";
  position: absolute;
  left: var(--sp-5);
  top: -1px;
  width: 42px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-violet), var(--c-cyan));
}
.page-about .team-plate:hover {
  border-color: rgba(139, 92, 246, 0.42);
  background: rgba(21, 17, 38, 0.88);
}
.page-about .team-meta {
  margin: 0 0 var(--sp-3);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}
.page-about .team-plate p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.7);
}

/* ---------- 流程 ---------- */
.page-about .flow-nav {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: var(--sp-5) 0 0;
  padding: 0;
}
.page-about .flow-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 13px;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-pill);
  font-size: 13px;
  text-decoration: none;
  color: rgba(244, 241, 234, 0.7);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-about .flow-nav a:hover,
.page-about .flow-nav a:focus-visible {
  color: var(--c-paper);
  border-color: var(--c-cyan);
  background: rgba(34, 211, 238, 0.1);
  outline: none;
}
.page-about .flow-nav .mono {
  font-size: 11px;
  color: var(--c-cyan);
}
.page-about .flow-steps {
  list-style: none;
  display: grid;
  gap: var(--sp-3);
  margin: var(--sp-5) 0 0;
  padding: 0;
}
.page-about .flow-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--sp-4);
  padding: var(--sp-4);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(21, 17, 38, 0.9), rgba(11, 7, 20, 0.62));
  scroll-margin-top: var(--about-anchor);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-about .flow-step:target {
  border-color: var(--c-violet);
  box-shadow: 0 0 0 1px rgba(139, 92, 246, 0.5), var(--glow-v);
}
.page-about .flow-num {
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-violet);
}
.page-about .flow-body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.7);
}

/* ---------- 规模数字 ---------- */
.page-about .scale-figures {
  list-style: none;
  display: grid;
  gap: var(--sp-5);
  margin: var(--sp-6) 0 var(--sp-6);
  padding: 0;
}
.page-about .scale-figures li {
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--about-rule);
}
.page-about .scale-num {
  display: block;
  font-size: clamp(2.4rem, 5.2vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--c-gold);
}
.page-about .scale-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(244, 241, 234, 0.56);
}
.page-about .about-link-row {
  margin-top: var(--sp-5) !important;
}

/* ---------- 玩家场景 ---------- */
.page-about .scene-list {
  display: grid;
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}
.page-about .scene {
  padding: var(--sp-5);
  border-left: 2px solid rgba(139, 92, 246, 0.7);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(21, 17, 38, 0.55);
}
.page-about .scene:nth-child(2) {
  border-left-color: rgba(34, 211, 238, 0.7);
}
.page-about .scene:nth-child(3) {
  border-left-color: rgba(255, 122, 61, 0.7);
}
.page-about .scene-tag {
  display: inline-block;
  margin-bottom: var(--sp-3);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--c-cyan);
}
.page-about .scene p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: rgba(244, 241, 234, 0.72);
}

/* ---------- 行动区 ---------- */
.page-about .about-cta {
  margin-top: var(--sp-6);
  padding: var(--sp-5);
  border: 1px solid rgba(139, 92, 246, 0.34);
  border-radius: var(--r-lg);
  background:
    radial-gradient(420px 200px at 6% 0%, rgba(139, 92, 246, 0.2), transparent 70%),
    rgba(21, 17, 38, 0.8);
}
.page-about .about-cta > p {
  margin: 0 0 var(--sp-4);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.78);
}
.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

/* ---------- 焦点可见性 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .team-plates {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .scale-figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .tl-card {
    padding: var(--sp-5);
  }
}

@media (min-width: 860px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }
  .page-about .chapter-grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }
  .page-about .chapter-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--sp-2);
    align-self: start;
    position: sticky;
    top: var(--about-anchor);
  }
  .page-about .chapter-kicker {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
  }
  .page-about .scene-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta {
    padding: var(--sp-6);
  }
}

@media (min-width: 1024px) {
  .page-about .scale-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-index-inner {
    gap: var(--sp-5);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-card,
  .page-about .team-plate,
  .page-about .flow-step,
  .page-about .idx-chapters a,
  .page-about .flow-nav a {
    transition: none;
  }
  .page-about .tl-item:hover .tl-card,
  .page-about .tl-item:focus-within .tl-card {
    transform: none;
  }
}