.page-about {
  --abt-purple-glow: rgba(123, 47, 247, 0.22);
  --abt-gold-glow: rgba(255, 215, 0, 0.16);
  --abt-blue-glow: rgba(77, 216, 255, 0.12);
  --abt-card-bg: #151B33;
  --abt-line: #2A3357;
  --abt-font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --abt-font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
  --abt-content-max: 1360px;
  position: relative;
  background: #0B1026;
  color: #F5F7FF;
  font-family: var(--abt-font-sans);
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about .about-breadcrumb {
  max-width: var(--abt-content-max);
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 0.85rem;
  color: #AAB4D1;
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-breadcrumb a {
  color: #AAB4D1;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-breadcrumb a:hover {
  color: #FFD700;
  border-color: #7B2FF7;
}

.page-about .crumb-sep {
  color: #7B2FF7;
  font-family: var(--abt-font-mono);
}

.page-about .about-hero {
  max-width: var(--abt-content-max);
  margin: 0 auto;
  padding: 32px 24px 48px;
  position: relative;
}

.page-about .hero-glint {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, var(--abt-purple-glow) 0%, transparent 70%);
  z-index: 0;
  pointer-events: none;
}

.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: #4DD8FF;
  border: 1px solid #2A3357;
  padding: 6px 12px;
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  background: rgba(21, 27, 51, 0.6);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.page-about .hero-kicker-mark {
  color: #FFD700;
  font-size: 1rem;
  animation: abt-pulse-dot 1.2s ease-in-out infinite;
}

.page-about .hero-title {
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  transform: rotate(-2deg);
  transform-origin: left center;
  margin: 0 0 20px;
  position: relative;
  z-index: 1;
}

.page-about .hero-title em {
  font-style: normal;
  color: #7B2FF7;
  -webkit-text-stroke: 1px rgba(123, 47, 247, 0.5);
  background: linear-gradient(90deg, #7B2FF7 0%, #AAB4D1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .hero-lead {
  max-width: 720px;
  font-size: 1.05rem;
  color: #AAB4D1;
  margin: 0 0 32px;
  border-left: 3px solid #FFD700;
  padding-left: 16px;
  position: relative;
  z-index: 1;
}

.page-about .hero-datastrip {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  border-top: 1px solid #2A3357;
  border-bottom: 1px solid #2A3357;
  padding: 16px 0;
}

.page-about .datastrip-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 12px;
  background: rgba(21, 27, 51, 0.4);
  clip-path: polygon(10px 0, 100% 0, calc(100% - 10px) 100%, 0 100%);
  border-left: 2px solid #7B2FF7;
}

.page-about .datastrip-prefix {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: #AAB4D1;
}

.page-about .datastrip-num {
  font-family: var(--abt-font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: #FFD700;
  line-height: 1.2;
}

.page-about .datastrip-suffix {
  font-size: 0.75rem;
  color: #AAB4D1;
}

.page-about .orbital-rule {
  display: block;
  max-width: var(--abt-content-max);
  margin: 0 auto;
  height: 2px;
  background: linear-gradient(90deg, transparent, #7B2FF7 30%, #FFD700 70%, transparent);
  position: relative;
}

.page-about .orbital-rule .rule-glow {
  position: absolute;
  top: -3px;
  left: 30%;
  width: 8px;
  height: 8px;
  background: #FFD700;
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.6);
}

.page-about .section-no {
  font-family: var(--abt-font-mono);
  font-size: 3rem;
  font-weight: 900;
  color: #7B2FF7;
  line-height: 1;
  display: block;
  text-shadow: 0 0 24px rgba(123, 47, 247, 0.4);
}

.page-about .section-label {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: #AAB4D1;
  border: 1px solid #2A3357;
  padding: 4px 10px;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
  text-transform: uppercase;
}

.page-about .section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
}

.page-about .about-who {
  max-width: var(--abt-content-max);
  margin: 0 auto;
  padding: 80px 24px 40px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  position: relative;
}

.page-about .who-index {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
}

.page-about .who-index-note {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  position: absolute;
  right: -8px;
  top: 0;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: #AAB4D1;
  opacity: 0.7;
  white-space: nowrap;
  border-right: 1px solid #2A3357;
  padding-right: 8px;
}

.page-about .who-body {
  position: relative;
}

.page-about .who-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .who-left {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .who-paragraph {
  margin: 0;
  font-size: 0.95rem;
  color: #F5F7FF;
}

.page-about .who-paragraph strong {
  color: #FFD700;
  font-weight: 700;
}

.page-about .who-insight {
  position: relative;
  background: rgba(21, 27, 51, 0.5);
  border: 1px solid #2A3357;
  padding: 28px 24px;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .insight-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, #7B2FF7 0%, transparent 100%);
}

.page-about .insight-text {
  font-size: 0.9rem;
  color: #AAB4D1;
  font-weight: 700;
}

.page-about .insight-arrow {
  color: #FFD700;
  font-size: 1.4rem;
  line-height: 1;
}

.page-about .insight-live {
  font-size: 1.2rem;
  color: #F5F7FF;
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-about .insight-caption {
  font-size: 0.75rem;
  color: #AAB4D1;
  letter-spacing: 0.06em;
}

.page-about .about-timeline {
  max-width: var(--abt-content-max);
  margin: 0 auto;
  padding: 80px 24px 40px;
  position: relative;
}

.page-about .timeline-head {
  margin-bottom: 40px;
}

.page-about .timeline-title-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
}

.page-about .timeline-lead {
  margin: 8px 0 0;
  max-width: 640px;
  color: #AAB4D1;
  font-size: 0.95rem;
}

.page-about .timeline-rail {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 28px;
}

.page-about .rail-bg {
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: repeating-linear-gradient(180deg, #7B2FF7 0 6px, transparent 6px 12px);
  opacity: 0.6;
}

.page-about .timeline-entry {
  position: relative;
  padding: 0 0 32px 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .entry-dot {
  position: absolute;
  left: -28px;
  top: 8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #151B33;
  border: 2px solid #7B2FF7;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: default;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
  z-index: 1;
}

.page-about .entry-dot:hover,
.page-about .entry-dot:focus-visible {
  box-shadow: 0 0 0 6px rgba(123, 47, 247, 0.2);
  transform: scale(1.15);
  outline: none;
}

.page-about .dot-core {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #FFD700;
}

.page-about .timeline-entry.is-current .entry-dot {
  border-color: #FFD700;
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
}

.page-about .timeline-entry.is-current .dot-core {
  background: #FFD700;
}

.page-about .entry-card {
  background: #151B33;
  border: 1px solid #2A3357;
  padding: 20px;
  position: relative;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .entry-card:hover {
  border-color: #7B2FF7;
  transform: translateX(4px);
  box-shadow: 4px 4px 0 rgba(123, 47, 247, 0.25);
}

.page-about .entry-ver {
  color: #7B2FF7;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 4px;
  font-weight: 700;
}

.page-about .entry-title {
  font-size: 1.2rem;
  font-weight: 900;
  margin: 0 0 8px;
  color: #F5F7FF;
}

.page-about .entry-desc {
  margin: 0 0 10px;
  font-size: 0.9rem;
  color: #AAB4D1;
}

.page-about .entry-detail-tag {
  display: inline-block;
  font-size: 0.72rem;
  color: #FFD700;
  border: 1px solid rgba(255, 215, 0, 0.3);
  padding: 3px 8px;
  letter-spacing: 0.04em;
}

.page-about .mono {
  font-family: var(--abt-font-mono);
}

.page-about .about-coverage {
  max-width: var(--abt-content-max);
  margin: 0 auto;
  padding: 80px 24px 40px;
  position: relative;
}

.page-about .coverage-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .coverage-lead {
  max-width: 640px;
  color: #AAB4D1;
  font-size: 0.95rem;
  margin: 0;
}

.page-about .coverage-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .coverage-map {
  position: relative;
}

.page-about .map-frame {
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  border: 1px solid #2A3357;
}

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

.page-about .map-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 16, 38, 0.2) 0%, rgba(11, 16, 38, 0.6) 100%);
}

.page-about .overlay-region {
  position: absolute;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #FFD700;
  background: rgba(11, 16, 38, 0.8);
  padding: 4px 10px;
  border: 1px solid rgba(255, 215, 0, 0.4);
}

.page-about .region-east {
  top: 18%;
  left: 72%;
}

.page-about .region-south {
  bottom: 18%;
  left: 62%;
}

.page-about .region-north {
  top: 14%;
  left: 35%;
}

.page-about .region-west {
  top: 42%;
  left: 14%;
}

.page-about .region-mid {
  top: 38%;
  left: 48%;
}

.page-about .map-caption {
  font-size: 0.78rem;
  color: #AAB4D1;
  margin: 10px 0 0;
  text-align: right;
  letter-spacing: 0.06em;
  border-bottom: 1px solid #2A3357;
  padding-bottom: 6px;
}

.page-about .coverage-detail {
  position: relative;
}

.page-about .detail-buffer {
  height: 24px;
  background: repeating-linear-gradient(135deg, #7B2FF7 0 2px, transparent 2px 8px);
  opacity: 0.3;
  margin-bottom: 20px;
}

.page-about .coverage-subtitle {
  font-size: 1.2rem;
  font-weight: 900;
  margin: 0 0 8px;
  color: #F5F7FF;
}

.page-about .coverage-text {
  margin: 0 0 20px;
  font-size: 0.95rem;
  color: #AAB4D1;
}

.page-about .coverage-cats {
  margin-bottom: 20px;
}

.page-about .cat-label {
  display: inline-block;
  font-size: 0.72rem;
  color: #7B2FF7;
  letter-spacing: 0.1em;
  margin-bottom: 10px;
  border: 1px solid #7B2FF7;
  padding: 3px 8px;
}

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

.page-about .cat-list li {
  font-size: 0.82rem;
  color: #F5F7FF;
  border: 1px solid #2A3357;
  padding: 4px 10px;
  background: rgba(21, 27, 51, 0.5);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .cat-list li:hover {
  border-color: #FFD700;
  color: #FFD700;
}

.page-about .coverage-boundary {
  background: rgba(21, 27, 51, 0.6);
  border-left: 3px solid #FF9F40;
  padding: 16px;
  font-size: 0.9rem;
  color: #F5F7FF;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.page-about .coverage-boundary strong {
  color: #FF9F40;
}

.page-about .boundary-icon {
  flex-shrink: 0;
  color: #FF9F40;
  font-size: 1.2rem;
  line-height: 1.6;
}

.page-about .about-principles {
  max-width: var(--abt-content-max);
  margin: 0 auto;
  padding: 80px 24px 40px;
  position: relative;
}

.page-about .principles-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .principles-lead {
  max-width: 640px;
  color: #AAB4D1;
  font-size: 0.95rem;
  margin: 0;
}

.page-about .principles-more {
  align-self: flex-start;
  margin-top: 4px;
}

.page-about .principles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .principle-item {
  background: #151B33;
  border: 1px solid #2A3357;
  padding: 32px 24px 28px;
  position: relative;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .principle-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, #7B2FF7 0%, #FFD700 100%);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.page-about .principle-item:hover {
  border-color: #7B2FF7;
  transform: translateY(-3px);
}

.page-about .principle-item:hover::before {
  opacity: 1;
}

.page-about .principle-idx {
  display: block;
  color: #7B2FF7;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
  font-weight: 700;
}

.page-about .principle-title {
  font-size: 1.2rem;
  font-weight: 900;
  margin: 0 0 10px;
  color: #F5F7FF;
}

.page-about .principle-text {
  margin: 0 0 16px;
  font-size: 0.9rem;
  color: #AAB4D1;
}

.page-about .principle-tag {
  font-size: 0.7rem;
  color: #FFD700;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.page-about .about-version-note {
  max-width: var(--abt-content-max);
  margin: 0 auto;
  padding: 80px 24px 40px;
  position: relative;
}

.page-about .version-note-body {
  background: #151B33;
  border: 1px solid #2A3357;
  padding: 48px 32px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
  overflow: hidden;
}

.page-about .version-note-body::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 100%;
  background: linear-gradient(135deg, rgba(123, 47, 247, 0.2) 0%, transparent 100%);
  pointer-events: none;
}

.page-about .version-note-glow {
  position: absolute;
  top: 40px;
  right: 40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 215, 0, 0.15) 0%, transparent 70%);
  z-index: 0;
}

.page-about .version-note-badge {
  display: inline-block;
  background: #7B2FF7;
  color: #F5F7FF;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 16px;
  margin-bottom: 16px;
  letter-spacing: 0.1em;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}

.page-about .version-note-title {
  font-size: 1.6rem;
  font-weight: 900;
  margin: 0 0 12px;
  color: #F5F7FF;
  position: relative;
  z-index: 1;
}

.page-about .version-note-text {
  margin: 0 0 24px;
  max-width: 620px;
  font-size: 0.95rem;
  color: #AAB4D1;
  position: relative;
  z-index: 1;
}

.page-about .version-note-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.page-about .about-stats-strip {
  background: #151B33;
  border-top: 1px solid #2A3357;
  border-bottom: 1px solid #2A3357;
  padding: 0 24px;
}

.page-about .stats-strip-inner {
  max-width: var(--abt-content-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  padding: 32px 0;
}

.page-about .stat-block {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-left: 2px solid #2A3357;
  padding-left: 14px;
}

.page-about .stat-num {
  font-size: 2.2rem;
  font-weight: 700;
  color: #FFD700;
  line-height: 1;
  letter-spacing: -0.03em;
}

.page-about .stat-desc {
  font-size: 0.8rem;
  color: #AAB4D1;
}

.page-about .about-cta-image {
  position: relative;
  width: 100%;
  height: 260px;
  overflow: hidden;
}

.page-about .cta-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .cta-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 16, 38, 0.4) 0%, rgba(11, 16, 38, 0.8) 100%);
}

@keyframes abt-pulse-dot {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.8);
  }
}

.page-about .btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #7B2FF7;
  color: #F5F7FF;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 12px 28px;
  border: none;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.page-about .btn-primary:hover {
  background: #6a27dd;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(123, 47, 247, 0.4);
}

.page-about .btn-primary:focus-visible,
.page-about .btn-ghost:focus-visible {
  outline: 2px solid #FFD700;
  outline-offset: 2px;
}

.page-about .btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: #F5F7FF;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 12px 24px;
  border: 1px solid #2A3357;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
  cursor: pointer;
}

.page-about .btn-ghost:hover {
  border-color: #FFD700;
  color: #FFD700;
  background: rgba(255, 215, 0, 0.05);
}

.page-about .panel-clip {
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

@media (min-width: 640px) {
  .page-about .hero-datastrip {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .page-about .timeline-entry {
    grid-template-columns: 80px 1fr;
    gap: 16px;
  }

  .page-about .principle-item {
    padding: 40px 32px 32px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 56px 24px 72px;
  }

  .page-about .hero-title {
    font-size: 4.2rem;
  }

  .page-about .about-who {
    grid-template-columns: 220px 1fr;
    gap: 48px;
    padding: 96px 24px 48px;
  }

  .page-about .who-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .who-index-note {
    left: -12px;
    right: auto;
  }

  .page-about .about-timeline {
    padding: 96px 24px 48px;
  }

  .page-about .about-coverage {
    padding: 96px 24px 48px;
  }

  .page-about .coverage-body {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-principles {
    padding: 96px 24px 48px;
  }

  .page-about .principles-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .page-about .about-version-note {
    padding: 96px 24px 48px;
  }

  .page-about .version-note-body {
    padding: 64px 48px;
  }

  .page-about .about-cta-image {
    height: 400px;
  }
}

@media (min-width: 1200px) {
  .page-about .timeline-lead {
    font-size: 1rem;
  }

  .page-about .principles-lead {
    font-size: 1rem;
  }

  .page-about .coverage-lead {
    font-size: 1rem;
  }

  .page-about .who-paragraph {
    font-size: 1rem;
  }
}