.page-about {
  --about-ink: #E6E6F0;
  --about-muted: #A0A0B8;
  --about-line: #3B2A55;
  --about-neon: #00F0FF;
  --about-gold: #FFD700;
  --about-gold-deep: #B8860B;
  --about-panel: #1A0B2E;
  --about-deep: #2E1065;
  --about-bg: #0A0A0F;
  --about-warn: #FF5A3C;
  --about-radius: 10px;
  --about-font-display: "Orbitron", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --about-font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --about-font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  background: var(--about-bg);
  color: var(--about-ink);
  overflow-x: hidden;
}

.page-about .container {
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: 24px;
}

.page-about .page-hero {
  padding-block: 56px 40px;
  position: relative;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px 0;
  align-items: start;
}

.page-about .about-hero-left {
  position: relative;
}

.page-about .section-eyebrow {
  display: inline-block;
  font-family: var(--about-font-mono);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--about-neon);
  border: 1px solid var(--about-line);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.page-about .page-title {
  font-family: var(--about-font-display);
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 1px;
  color: var(--about-ink);
  margin: 0 0 20px;
  max-width: 680px;
  background: linear-gradient(135deg, #E6E6F0 30%, #FFD700 70%, #B8860B 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .page-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-muted);
  max-width: 600px;
  margin: 0 0 24px;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--about-font-mono);
  font-size: 12px;
  color: var(--about-muted);
  border: 1px solid var(--about-line);
  background: rgba(26, 11, 46, 0.7);
  padding: 4px 10px;
  border-radius: 4px;
  white-space: nowrap;
}

.page-about .tag-gold {
  color: var(--about-gold);
  border-color: rgba(255, 215, 0, 0.4);
  background: rgba(46, 16, 101, 0.4);
}

.page-about .about-hero-badge {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 120px;
  height: 120px;
  border-radius: 16px;
  object-fit: cover;
  border: 1px solid var(--about-line);
  opacity: 0.9;
  display: none;
  filter: saturate(1.1);
}

.page-about .about-hero-right {
  border-left: 2px solid var(--about-line);
  padding-left: 20px;
  position: relative;
}

.page-about .about-hero-index {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 14px;
}

.page-about .about-index-num {
  font-family: var(--about-font-display);
  font-size: 48px;
  font-weight: 800;
  color: var(--about-gold);
  line-height: 1;
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.25);
}

.page-about .about-index-label {
  font-family: var(--about-font-mono);
  font-size: 12px;
  color: var(--about-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.page-about .about-hero-rule {
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, var(--about-gold), var(--about-line), transparent);
  margin-bottom: 18px;
}

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

.page-about .about-index-link {
  display: inline-flex;
  font-family: var(--about-font-mono);
  font-size: 14px;
  color: var(--about-muted);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
  border-left: 2px solid transparent;
  padding-left: 10px;
}

.page-about .about-index-link:hover,
.page-about .about-index-link.is-spied {
  color: var(--about-neon);
  border-left-color: var(--about-neon);
  padding-left: 14px;
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: 80px;
}

.page-about .about-aside {
  display: none;
  position: sticky;
  top: 90px;
  align-self: start;
  grid-template-columns: 1fr;
  gap: 0;
  border-right: 1px solid var(--about-line);
  padding-right: 16px;
  padding-top: 24px;
  min-height: 480px;
}

.page-about .about-aside-unit {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-block: 10px;
  border-bottom: 1px solid rgba(59, 42, 85, 0.5);
}

.page-about .about-aside-num {
  font-family: var(--about-font-mono);
  font-size: 12px;
  color: var(--about-gold-deep);
  min-width: 22px;
}

.page-about .about-aside-link {
  font-family: var(--about-font-body);
  font-size: 14px;
  color: var(--about-muted);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.page-about .about-aside-link:hover,
.page-about .about-aside-link.is-spied {
  color: var(--about-neon);
  transform: translateX(4px);
}

.page-about .about-aside-footer {
  margin-top: auto;
  padding-top: 24px;
}

.page-about .about-aside-note {
  font-family: var(--about-font-body);
  font-size: 13px;
  color: var(--about-muted);
  margin: 0 0 4px;
}

.page-about .about-aside-tip {
  font-family: var(--about-font-mono);
  font-size: 12px;
  color: var(--about-gold);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0;
}

.page-about .about-main {
  display: grid;
  gap: 64px;
}

.page-about .about-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  scroll-margin-top: 96px;
}

.page-about .about-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.page-about .about-section-head {
  position: relative;
  padding-left: 14px;
  border-left: 3px solid var(--about-neon);
}

.page-about .about-section-chapter {
  display: block;
  font-family: var(--about-font-mono);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--about-gold-deep);
  margin-bottom: 6px;
}

.page-about .about-section-title {
  font-family: var(--about-font-display);
  font-size: clamp(22px, 3.5vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  # margin: 0;
  color: var(--about-ink);
}

.page-about .about-section-body {
  display: grid;
  gap: 20px;
  max-width: 720px;
}

.page-about .about-paragraph {
  font-family: var(--about-font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-muted);
  margin: 0;
}

.page-about .about-position-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .card-data {
  background: rgba(26, 11, 46, 0.85);
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  padding: 20px;
  position: relative;
  display: grid;
  gap: 8px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .card-data:hover {
  border-color: var(--about-neon);
  box-shadow: 0 0 24px rgba(0, 240, 255, 0.12);
}

.page-about .card-label {
  font-family: var(--about-font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--about-muted);
}

.page-about .about-card-strong {
  font-family: var(--about-font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--about-ink);
}

.page-about .about-card-sub {
  font-family: var(--about-font-body);
  font-size: 13px;
  color: var(--about-muted);
  line-height: 1.5;
}

.page-about .about-image {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--about-line);
  background: linear-gradient(135deg, rgba(26, 11, 46, 0.6), rgba(10, 10, 15, 0.9));
}

.page-about .about-image-wide {
  margin-block: 8px;
}

.page-about .about-version-stack {
  position: relative;
  display: grid;
  gap: 14px;
  padding-left: 12px;
}

.page-about .about-version-stack::before {
  content: "";
  position: absolute;
  left: 32px;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--about-neon), var(--about-gold), var(--about-warn), var(--about-neon));
  opacity: 0.45;
}

.page-about .about-version-card {
  position: relative;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px 14px;
  background: rgba(26, 11, 46, 0.6);
  border: 1px solid var(--about-line);
  border-radius: 10px;
  padding: 16px;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-version-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--v-accent, var(--about-neon));
}

.page-about .about-version-card:hover {
  border-color: var(--v-accent, var(--about-neon));
  transform: translateX(4px);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.1);
}

.page-about .about-version-mark {
  font-family: var(--about-font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--v-accent, var(--about-neon));
  align-self: start;
  padding-top: 2px;
}

.page-about .about-version-info {
  display: grid;
  gap: 6px;
}

.page-about .about-version-name {
  font-family: var(--about-font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--about-ink);
  margin: 0;
}

.page-about .about-version-desc {
  font-family: var(--about-font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0;
}

.page-about .about-version-era {
  grid-column: 2 / 3;
  justify-self: start;
  font-family: var(--about-font-mono);
  font-size: 11px;
  color: var(--v-accent, var(--about-neon));
  border: 1px solid rgba(59, 42, 85, 0.8);
  padding: 2px 8px;
  border-radius: 999px;
}

.page-about .about-version-svg {
  width: 100%;
  height: auto;
  max-width: 800px;
  margin-top: 4px;
}

.page-about .about-scale-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.page-about .about-scale-visual {
  order: 2;
}

.page-about .about-scale-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .card-number {
  font-family: var(--about-font-mono);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--about-gold);
  line-height: 1.1;
  text-shadow: 0 0 18px rgba(255, 215, 0, 0.15);
}

.page-about .about-scale-meta {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-scale-meta li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--about-font-body);
  font-size: 13px;
  color: var(--about-muted);
  background: rgba(10, 10, 15, 0.6);
  border: 1px solid var(--about-line);
  padding: 6px 12px;
  border-radius: 6px;
}

.page-about .status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--about-neon);
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
  display: inline-block;
  flex-shrink: 0;
}

.page-about .about-quote {
  margin: 8px 0;
  padding: 24px 28px;
  background: linear-gradient(135deg, rgba(46, 16, 101, 0.45), rgba(26, 11, 46, 0.6));
  border-left: 4px solid var(--about-gold);
  border-radius: 0 12px 12px 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-quote::after {
  content: "";
  position: absolute;
  right: -20px;
  top: -20px;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.08), transparent 70%);
}

.page-about .about-quote p {
  font-family: var(--about-font-display);
  font-size: clamp(17px, 2.5vw, 22px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--about-ink);
  margin: 0 0 10px;
}

.page-about .about-quote cite {
  font-family: var(--about-font-mono);
  font-size: 12px;
  font-style: normal;
  color: var(--about-gold-deep);
  letter-spacing: 1px;
}

.page-about .about-story-timeline {
  display: grid;
  gap: 18px;
  margin-top: 8px;
}

.page-about .about-story-line-item {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: 14px;
  align-items: start;
}

.page-about .about-story-node {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--about-font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--about-bg);
  background: linear-gradient(135deg, var(--about-neon), #00A8C8);
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.25);
}

.page-about .about-story-line-item:nth-child(2) .about-story-node {
  background: linear-gradient(135deg, var(--about-gold), var(--about-gold-deep));
  box-shadow: 0 0 14px rgba(255, 215, 0, 0.25);
}

.page-about .about-story-line-item:nth-child(3) .about-story-node {
  background: linear-gradient(135deg, #2E1065, #1A0B2E);
  color: var(--about-neon);
  border: 1px solid var(--about-neon);
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.15);
}

.page-about .about-story-line-item:nth-child(4) .about-story-node {
  background: linear-gradient(135deg, var(--about-neon), var(--about-deep));
  box-shadow: 0 0 14px rgba(0, 240, 255, 0.2);
}

.page-about .about-story-line-item h3 {
  font-family: var(--about-font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--about-ink);
  margin: 2px 0 6px;
}

.page-about .about-story-line-item p {
  font-family: var(--about-font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0;
}

.page-about .about-source-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .card-glow {
  position: relative;
  background: rgba(26, 11, 46, 0.7);
  border: 1px solid var(--about-line);
  border-radius: 10px;
  padding: 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}

.page-about .card-glow:hover {
  border-color: rgba(0, 240, 255, 0.5);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.08);
}

.page-about .about-source-title {
  font-family: var(--about-font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--about-ink);
  margin: 0 0 8px;
}

.page-about .about-source-desc {
  font-family: var(--about-font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0;
}

.page-about .about-source-note {
  font-size: 13px;
  color: var(--about-muted);
  border-left: 2px solid rgba(184, 134, 11, 0.6);
  padding-left: 14px;
}

.page-about .about-source-trust {
  font-size: 14px;
  color: var(--about-ink);
  background: rgba(10, 10, 15, 0.5);
  border: 1px solid var(--about-line);
  border-radius: 10px;
  padding: 18px;
}

.page-about .about-bottom-nav {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-bottom-card {
  display: grid;
  gap: 6px;
  background: linear-gradient(135deg, rgba(26, 11, 46, 0.8), rgba(10, 10, 15, 0.9));
  border: 1px solid var(--about-line);
  border-radius: 10px;
  padding: 18px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-bottom-card:hover {
  border-color: var(--about-neon);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.1);
}

.page-about .about-bottom-label {
  font-family: var(--about-font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--about-gold-deep);
}

.page-about .about-bottom-link {
  font-family: var(--about-font-body);
  font-size: 15px;
  font-weight: 600;
  color: var(--about-ink);
  text-decoration: none;
  line-height: 1.5;
}

.page-about .about-bottom-link:hover {
  color: var(--about-neon);
}

@media (min-width: 640px) {
  .page-about .container {
    padding-inline: 32px;
  }

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

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

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

  .page-about .about-hero-badge {
    display: block;
  }
}

@media (min-width: 1024px) {
  .page-about .page-hero {
    padding-block: 72px 56px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1.8fr 1fr;
    gap: 48px;
  }

  .page-about .about-hero-index {
    display: none;
  }

  .page-about .about-layout {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .about-aside {
    display: grid;
  }

  .page-about .about-section {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 32px;
  }

  .page-about .about-section-head {
    position: sticky;
    top: 100px;
    align-self: start;
  }

  .page-about .about-section-title {
    font-size: 30px;
  }

  .page-about .about-scale-grid {
    grid-template-columns: 0.8fr 1.2fr;
  }

  .page-about .about-scale-visual {
    order: initial;
  }

  .page-about .about-version-card {
    grid-template-columns: 56px 1fr auto;
    gap: 16px;
    align-items: center;
    padding: 20px;
  }

  .page-about .about-version-era {
    grid-column: 3 / 4;
    justify-self: end;
  }
}

@media (min-width: 1280px) {
  .page-about .container {
    padding-inline: 48px;
  }

  .page-about .about-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-section {
    grid-template-columns: 200px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .page-title,
  .page-about .about-version-card,
  .page-about .card-data,
  .page-about .card-glow {
    transition: none;
  }

  .page-about .about-section {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.page-about {
  --v-accent: transparent;
}