.page-about {
  --zh-about-bg-grid: 36px;
  position: relative;
  overflow-x: hidden;
  background-color: var(--zh-bg-0);
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.03) 1px, transparent 1px);
  background-size: var(--zh-about-bg-grid) var(--zh-about-bg-grid);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .about-rail {
  display: none;
}

.page-about .about-hero {
  position: relative;
  padding: var(--zh-space-xl) 0 var(--zh-space-xxl);
  border-bottom: 1px solid var(--zh-line-gold-dim);
  background:
    radial-gradient(ellipse at 80% 10%, rgba(212, 175, 55, 0.1) 0%, transparent 48%),
    linear-gradient(180deg, var(--zh-bg-2) 0%, var(--zh-bg-0) 72%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--zh-accent-red), var(--zh-line-gold), var(--zh-accent-red));
}

.page-about .about-hero .zh-container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .zh-breadcrumb {
  margin-bottom: var(--zh-space-xl);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--zh-space-xl);
  align-items: center;
  margin-top: var(--zh-space-xl);
}

.page-about .about-hero-kicker {
  margin: 0 0 var(--zh-space-md);
  font-family: var(--zh-font-heading);
  font-size: var(--zh-fs-micro);
  letter-spacing: 0.32em;
  color: var(--zh-accent-red);
}

.page-about .about-hero h1 {
  margin: 0 0 var(--zh-space-md);
  font-family: var(--zh-font-heading);
  font-size: var(--zh-fs-h1);
  line-height: var(--zh-lh-heading);
  color: var(--zh-text-0);
}

.page-about .about-hero-lead {
  margin: 0 0 var(--zh-space-lg);
  max-width: 56ch;
  color: var(--zh-text-1);
  line-height: var(--zh-lh-body);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--zh-space-md);
}

.page-about .about-hero-figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero-frame {
  position: relative;
  padding: var(--zh-space-md);
  border: 1px solid var(--zh-line-gold-dim);
  background: var(--zh-bg-1);
}

.page-about .about-hero-frame::before,
.page-about .about-hero-frame::after {
  content: "";
  position: absolute;
  width: 28px;
  height: 28px;
  border-color: var(--zh-accent-gold);
  border-style: solid;
}

.page-about .about-hero-frame::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.page-about .about-hero-frame::after {
  right: -1px;
  bottom: -1px;
  border-width: 0 1px 1px 0;
}

.page-about .about-hero-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-hero-caption {
  margin-top: var(--zh-space-md);
  font-size: var(--zh-fs-micro);
  letter-spacing: 0.12em;
  color: var(--zh-text-2);
  text-align: right;
}

.page-about .about-section {
  position: relative;
  padding: var(--zh-space-xl) 0;
  border-bottom: 1px solid var(--zh-line-gold-faint);
}

.page-about .about-section-head {
  margin-bottom: var(--zh-space-xl);
  max-width: 720px;
}

.page-about .about-section-head .zh-chapter-meta {
  margin: 0 0 var(--zh-space-sm);
  color: var(--zh-accent-red);
  font-family: var(--zh-font-heading);
  font-size: var(--zh-fs-data);
  letter-spacing: 0.24em;
}

.page-about .about-section-head .zh-chapter-title {
  margin: 0 0 var(--zh-space-md);
  font-family: var(--zh-font-heading);
  font-size: var(--zh-fs-h2);
  line-height: var(--zh-lh-heading);
  color: var(--zh-text-0);
}

.page-about .about-section-head .zh-chapter-rule {
  display: block;
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, var(--zh-line-gold), var(--zh-line-gold-faint));
}

.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--zh-space-lg);
}

.page-about .about-origin-drop-cap::first-letter {
  float: left;
  padding: 0.08em 0.12em 0 0;
  font-family: var(--zh-font-heading);
  font-size: 3.4em;
  line-height: 1;
  color: var(--zh-accent-red);
}

.page-about .about-origin-main p {
  margin: 0 0 var(--zh-space-md);
  color: var(--zh-text-1);
  line-height: var(--zh-lh-body);
}

.page-about .about-origin-main p:last-child {
  margin-bottom: 0;
}

.page-about .about-side-label {
  margin: 0 0 var(--zh-space-md);
  padding-top: var(--zh-space-md);
  border-top: 1px solid var(--zh-line-gold-faint);
  font-size: var(--zh-fs-micro);
  letter-spacing: 0.28em;
  color: var(--zh-accent-gold);
}

.page-about .about-quote {
  margin: 0;
  padding-left: var(--zh-space-lg);
  border-left: 2px solid var(--zh-line-gold);
  color: var(--zh-text-1);
  line-height: var(--zh-lh-body);
  font-family: var(--zh-font-heading);
}

.page-about .about-seal {
  display: inline-flex;
  align-items: center;
  gap: var(--zh-space-md);
  margin-top: var(--zh-space-xl);
  padding: var(--zh-space-sm) var(--zh-space-lg) var(--zh-space-sm) var(--zh-space-sm);
  border: 1px solid var(--zh-line-gold-dim);
  background: rgba(212, 175, 55, 0.05);
}

.page-about .about-seal-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--zh-accent-red);
  color: var(--zh-text-0);
  font-family: var(--zh-font-heading);
  font-size: var(--zh-fs-h3);
}

.page-about .about-seal-text {
  margin: 0;
  font-family: var(--zh-font-heading);
  font-size: var(--zh-fs-data);
  letter-spacing: 0.24em;
  color: var(--zh-text-0);
}

.page-about .about-dilemma-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--zh-space-xl);
}

.page-about .about-panel {
  position: relative;
  padding: var(--zh-space-lg);
  border: 1px solid var(--zh-line-gold-dim);
  background: rgba(14, 17, 22, 0.55);
}

.page-about .about-panel::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 12px;
  height: 12px;
}

.page-about .about-pain::before {
  background: var(--zh-accent-red);
}

.page-about .about-cure::before {
  background: var(--zh-accent-gold);
}

.page-about .about-panel-title {
  margin: 0 0 var(--zh-space-lg);
  font-family: var(--zh-font-heading);
  font-size: var(--zh-fs-h3);
  color: var(--zh-text-0);
}

.page-about .about-pain-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--zh-space-lg);
}

.page-about .about-pain-list li {
  display: grid;
  grid-template-columns: 36px 1fr;
  gap: var(--zh-space-md);
}

.page-about .about-pain-index {
  font-family: var(--zh-font-data);
  font-size: var(--zh-fs-data);
  color: var(--zh-accent-red);
}

.page-about .about-pain-list p,
.page-about .about-cure-item dd {
  margin: 0;
  color: var(--zh-text-1);
  line-height: var(--zh-lh-body);
}

.page-about .about-pain-list strong {
  color: var(--zh-text-0);
}

.page-about .about-cure-intro {
  margin: 0 0 var(--zh-space-lg);
  color: var(--zh-text-1);
}

.page-about .about-cure-list {
  margin: 0;
  display: grid;
  gap: var(--zh-space-lg);
}

.page-about .about-cure-item dt {
  display: flex;
  align-items: baseline;
  gap: var(--zh-space-sm);
  margin-bottom: var(--zh-space-xs);
  font-family: var(--zh-font-heading);
  color: var(--zh-text-0);
}

.page-about .about-cure-num {
  font-family: var(--zh-font-data);
  color: var(--zh-accent-gold);
}

.page-about .about-cure-item dd a {
  color: var(--zh-accent-gold);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-about .about-timeline {
  position: relative;
  margin: 0 0 var(--zh-space-xl);
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 7px;
  width: 1px;
  background: linear-gradient(180deg, var(--zh-line-gold), var(--zh-line-gold-faint) 80%);
}

.page-about .about-timeline-item {
  position: relative;
  display: grid;
  gap: var(--zh-space-sm);
  padding-left: 40px;
  margin-bottom: var(--zh-space-lg);
}

.page-about .about-timeline-item:last-child {
  margin-bottom: 0;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 3px;
  width: 9px;
  height: 9px;
  background: var(--zh-bg-0);
  border: 1px solid var(--zh-line-gold);
  transform: rotate(45deg);
}

.page-about .about-timeline-meta {
  display: flex;
  align-items: center;
  gap: var(--zh-space-sm);
  color: var(--zh-line-gold);
}

.page-about .about-timeline-icon {
  flex-shrink: 0;
}

.page-about .about-timeline-era {
  min-width: 3ch;
  font-family: var(--zh-font-data);
  font-size: var(--zh-fs-data);
  letter-spacing: 0.08em;
  color: var(--zh-accent-red);
}

.page-about .about-timeline-card {
  border: 1px solid var(--zh-line-gold-faint);
  background: var(--zh-bg-1);
}

.page-about .about-timeline-card summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--zh-space-sm);
  padding: var(--zh-space-md) var(--zh-space-lg);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.page-about .about-timeline-card summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline-card summary::after {
  content: "+";
  font-family: var(--zh-font-data);
  font-size: var(--zh-fs-h3);
  color: var(--zh-accent-gold);
  transition: transform 0.3s var(--zh-ease);
}

.page-about .about-timeline-card[open] summary::after {
  transform: rotate(45deg);
}

.page-about .about-timeline-term {
  font-family: var(--zh-font-heading);
  font-size: var(--zh-fs-body);
  color: var(--zh-text-0);
}

.page-about .about-timeline-hint {
  font-size: var(--zh-fs-micro);
  color: var(--zh-text-2);
  letter-spacing: 0.08em;
}

.page-about .about-timeline-body {
  padding: var(--zh-space-md) var(--zh-space-lg) var(--zh-space-lg);
  border-top: 1px solid var(--zh-line-gold-faint);
}

.page-about .about-timeline-body p {
  margin: 0;
  color: var(--zh-text-1);
  line-height: var(--zh-lh-body);
}

.page-about .about-chart-figure {
  margin: var(--zh-space-xl) 0 0;
  padding: var(--zh-space-md);
  border: 1px solid var(--zh-line-gold-dim);
}

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

.page-about .about-chart-figure figcaption {
  margin-top: var(--zh-space-md);
  font-size: var(--zh-fs-micro);
  letter-spacing: 0.12em;
  color: var(--zh-text-2);
  text-align: right;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--zh-space-md);
  margin-top: var(--zh-space-lg);
}

.page-about .about-stat {
  padding: var(--zh-space-md);
  border: 1px solid var(--zh-line-gold-faint);
  background: rgba(14, 17, 22, 0.4);
  text-align: center;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--zh-font-data);
  font-size: var(--zh-fs-h2);
  line-height: var(--zh-lh-heading);
  color: var(--zh-accent-gold);
}

.page-about .about-stat-label {
  display: block;
  margin-top: var(--zh-space-xs);
  font-size: var(--zh-fs-micro);
  letter-spacing: 0.12em;
  color: var(--zh-text-2);
}

.page-about .about-belief-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--zh-space-xl);
}

.page-about .about-belief-principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--zh-space-md);
}

.page-about .about-principle {
  padding: var(--zh-space-md);
  border: 1px solid var(--zh-line-gold-faint);
  border-left: 2px solid var(--zh-line-gold);
  background: rgba(14, 17, 22, 0.5);
}

.page-about .about-principle-num {
  display: inline-block;
  margin-bottom: var(--zh-space-xs);
  font-family: var(--zh-font-data);
  font-size: var(--zh-fs-micro);
  letter-spacing: 0.12em;
  color: var(--zh-accent-red);
}

.page-about .about-principle h3 {
  margin: 0 0 var(--zh-space-xs);
  font-family: var(--zh-font-heading);
  font-size: var(--zh-fs-body);
  color: var(--zh-text-0);
}

.page-about .about-principle p {
  margin: 0;
  font-size: var(--zh-fs-data);
  line-height: var(--zh-lh-body);
  color: var(--zh-text-1);
}

.page-about .about-belief-figure {
  margin: 0;
}

.page-about .about-belief-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--zh-line-gold-dim);
}

.page-about .about-belief-figure figcaption {
  margin-top: var(--zh-space-md);
  font-size: var(--zh-fs-micro);
  letter-spacing: 0.12em;
  color: var(--zh-text-2);
  text-align: right;
}

.page-about .about-belief-ref {
  margin: var(--zh-space-xl) 0 0;
  padding: var(--zh-space-md) var(--zh-space-lg);
  border: 1px dashed var(--zh-line-gold-dim);
  font-size: var(--zh-fs-data);
  line-height: var(--zh-lh-body);
  color: var(--zh-text-1);
}

.page-about .about-belief-ref a {
  color: var(--zh-accent-gold);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-about .about-next {
  position: relative;
  padding: var(--zh-space-xxl) 0;
  border-top: 1px solid var(--zh-line-gold-dim);
  background: linear-gradient(180deg, var(--zh-bg-1), var(--zh-bg-0));
}

.page-about .about-next-frame {
  position: relative;
  padding: var(--zh-space-xl);
  border: 1px solid var(--zh-line-gold-dim);
  background: rgba(14, 17, 22, 0.6);
}

.page-about .about-next-frame::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 12px;
  height: 12px;
  background: var(--zh-accent-red);
}

.page-about .about-next-text {
  margin: var(--zh-space-md) 0 var(--zh-space-lg);
  max-width: 52ch;
  color: var(--zh-text-1);
  line-height: var(--zh-lh-body);
}

@media (min-width: 600px) {
  .page-about .about-belief-principles {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 768px) {
  .page-about .about-hero {
    padding-top: var(--zh-space-xxl);
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--zh-space-xxl);
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--zh-space-xxl);
  }

  .page-about .about-dilemma-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--zh-space-xxl);
  }

  .page-about .about-timeline-item {
    grid-template-columns: 180px minmax(0, 1fr);
    align-items: start;
    gap: var(--zh-space-md);
    padding-left: 48px;
  }

  .page-about .about-timeline-meta {
    padding-top: var(--zh-space-sm);
  }

  .page-about .about-belief-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--zh-space-xxl);
    align-items: center;
  }
}

@media (min-width: 992px) {
  .page-about .about-rail {
    display: flex;
    flex-direction: column;
    gap: var(--zh-space-sm);
    position: fixed;
    top: 50%;
    left: 20px;
    z-index: 60;
    transform: translateY(-50%);
    padding: var(--zh-space-md) var(--zh-space-sm);
    border: 1px solid var(--zh-line-gold-faint);
    background: rgba(8, 10, 13, 0.7);
  }

  .page-about .about-rail::before {
    content: "";
    position: absolute;
    top: var(--zh-space-md);
    bottom: var(--zh-space-md);
    left: 50%;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--zh-line-gold), transparent);
  }

  .page-about .about-rail-dot {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--zh-space-md);
    padding: var(--zh-space-xs) 0;
    text-decoration: none;
    color: var(--zh-text-2);
    transition: color 0.3s var(--zh-ease);
  }

  .page-about .about-rail-dot-core {
    flex-shrink: 0;
    width: 9px;
    height: 9px;
    border: 1px solid var(--zh-line-gold-dim);
    background: var(--zh-bg-0);
    transform: rotate(45deg);
    transition: background 0.3s var(--zh-ease), border-color 0.3s var(--zh-ease), box-shadow 0.3s var(--zh-ease);
  }

  .page-about .about-rail-dot-text {
    opacity: 0;
    transform: translateX(-4px);
    white-space: nowrap;
    font-size: var(--zh-fs-micro);
    letter-spacing: 0.12em;
    transition: opacity 0.3s var(--zh-ease), transform 0.3s var(--zh-ease);
  }

  .page-about .about-rail-dot:hover,
  .page-about .about-rail-dot.is-active {
    color: var(--zh-text-0);
  }

  .page-about .about-rail-dot:hover .about-rail-dot-core,
  .page-about .about-rail-dot.is-active .about-rail-dot-core {
    background: var(--zh-accent-gold);
    border-color: var(--zh-accent-gold);
    box-shadow: 0 0 8px rgba(232, 200, 55, 0.45);
  }

  .page-about .about-rail-dot:hover .about-rail-dot-text,
  .page-about .about-rail-dot.is-active .about-rail-dot-text {
    opacity: 1;
    transform: translateX(0);
  }
}