.page-about {
  --about-sidebar-w: 250px;
  --about-line: rgba(200, 204, 208, 0.18);
  background: linear-gradient(180deg, rgba(6, 10, 26, 0.75) 0%, rgba(10, 30, 92, 0.42) 100%), var(--c-void);
  color: var(--c-paper);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-wrap: anywhere;
  min-width: 0;
}

.about-chapter-nav {
  position: sticky;
  top: var(--header-h);
  z-index: 40;
  background: rgba(6, 10, 26, 0.96);
  border-bottom: 1px solid var(--about-line);
  backdrop-filter: blur(8px);
}

.about-chapter-nav-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
}

.about-nav-kicker {
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--c-muted);
  margin: 0;
  white-space: nowrap;
}

.about-chapter-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 4px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.about-chapter-list::-webkit-scrollbar {
  display: none;
}

.about-chapter-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  text-decoration: none;
  color: var(--c-paper);
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  background: rgba(17, 34, 64, 0.7);
  border: 1px solid var(--about-line);
}

.about-chapter-num {
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--c-fluor);
}

.about-nav-stats {
  display: none;
}

.about-content {
  min-width: 0;
}

.about-content .breadcrumb {
  padding: 16px 16px 0;
}

.about-hero {
  position: relative;
  padding: 40px 16px 32px;
  overflow: hidden;
}

.about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 58%;
  height: 100%;
  z-index: 0;
  background: linear-gradient(225deg, rgba(0, 255, 157, 0.14) 0%, transparent 55%), linear-gradient(135deg, transparent 30%, rgba(255, 107, 0, 0.12));
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 4% 100%);
}

.about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 22%;
  height: 8px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-fluor));
  z-index: 2;
}

.about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 24px;
}

.about-hero-kicker {
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--c-fluor);
  margin: 0 0 12px;
}

.about-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(28px, 6vw, 52px);
  line-height: 1.18;
  margin: 0 0 16px;
  max-width: 14em;
}

.about-lede {
  font-size: 16px;
  color: var(--c-muted);
  max-width: 60em;
  margin: 0 0 12px;
}

.about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

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

.about-hero-fact {
  background: rgba(17, 34, 64, 0.8);
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--c-fluor);
  padding: 16px;
  box-shadow: var(--shadow);
}

.about-hero-fact:last-child {
  grid-column: 1 / -1;
}

.about-hero-fact .stat-value {
  display: block;
  font-family: var(--font-data);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-fluor);
}

.about-hero-fact .stat-label {
  display: block;
  font-size: 13px;
  color: var(--c-muted);
  margin-top: 4px;
}

.about-section {
  position: relative;
  padding: 32px 16px;
}

.about-section-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
}

.about-section-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 56px;
  line-height: 0.9;
  flex: 0 0 auto;
  color: transparent;
  -webkit-text-stroke: 2px var(--c-fluor);
}

.about-section-head h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 40px);
  margin: 0;
}

.about-kicker {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-fluor);
  margin-bottom: 4px;
}

.about-section-intro {
  color: var(--c-muted);
  max-width: 60em;
  margin-bottom: 24px;
}

.about-timeline {
  position: relative;
  margin-top: 16px;
}

.about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-fluor), rgba(0, 255, 157, 0.08));
}

.about-timeline-item {
  position: relative;
  padding-left: 40px;
  margin-bottom: 16px;
}

.about-timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-space);
  border: 3px solid var(--c-fluor);
  box-shadow: 0 0 0 2px rgba(0, 255, 157, 0.2);
  animation: about-pulse 2.6s ease-in-out infinite;
}

@keyframes about-pulse {
  0%, 100% {
    box-shadow: 0 0 0 2px rgba(0, 255, 157, 0.2);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(0, 255, 157, 0.04);
  }
}

.about-timeline-body {
  background: rgba(17, 34, 64, 0.72);
  border: 1px solid var(--about-line);
  padding: 20px;
  box-shadow: var(--shadow);
}

.about-timeline-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-fluor);
  border: 1px solid rgba(0, 255, 157, 0.4);
  padding: 2px 8px;
  margin-bottom: 10px;
}

.about-timeline-body h3 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  margin: 0 0 8px;
}

.about-timeline-body p {
  font-size: 15px;
  color: var(--c-muted);
  margin: 0;
}

.about-media-timeline {
  margin-top: 32px;
}

.about-media-data {
  margin: 28px 0;
}

.about-media-security {
  margin-top: 16px;
}

.about-media-timeline img,
.about-media-data img,
.about-media-security img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.about-data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 28px;
}

.about-data-item {
  background: var(--c-card);
  border: 1px solid var(--about-line);
  padding: 18px 12px;
  text-align: center;
}

.about-data-item .stat-value {
  display: block;
  font-family: var(--font-data);
  font-size: 30px;
  font-weight: 700;
  color: var(--c-fluor);
}

.about-data-item .stat-label {
  display: block;
  font-size: 13px;
  color: var(--c-muted);
  margin-top: 4px;
}

.about-data-detail {
  border-left: 4px solid var(--c-fluor);
  padding: 8px 0 8px 20px;
  background: rgba(17, 34, 64, 0.35);
}

.about-data-detail h3 {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 900;
  margin: 0 0 12px;
}

.about-data-detail p {
  font-size: 15px;
  color: var(--c-muted);
  margin: 0 0 12px;
}

.about-compliance-grid {
  display: grid;
  gap: 24px;
}

.about-compliance-text h3 {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 900;
  margin: 0 0 12px;
}

.about-compliance-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.about-compliance-list li {
  position: relative;
  padding: 12px 0 12px 28px;
  border-bottom: 1px solid var(--about-line);
  font-size: 15px;
}

.about-compliance-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 12px;
  height: 8px;
  background: var(--c-fluor);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

.about-compliance-text p {
  font-size: 15px;
  color: var(--c-muted);
}

.about-compliance-links {
  margin-top: 20px;
}

.about-eco-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 28px;
}

.about-eco-card {
  background: var(--c-card);
}

.about-eco-card h3 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  margin: 0 0 8px;
}

.about-eco-card p {
  color: var(--c-muted);
  font-size: 15px;
}

.about-eco-note {
  background: rgba(6, 10, 26, 0.5);
  border: 1px dashed rgba(0, 255, 157, 0.35);
  padding: 20px;
}

.about-eco-note h3 {
  font-size: 20px;
  font-weight: 900;
  margin: 0 0 8px;
}

.about-eco-note p {
  color: var(--c-muted);
  font-size: 15px;
}

.about-eco-note a {
  color: var(--c-fluor);
}

.about-trust {
  padding: 32px 16px 56px;
}

.about-trust-card {
  background: linear-gradient(135deg, rgba(0, 255, 157, 0.08), transparent 40%), rgba(17, 34, 64, 0.92);
  border: 2px solid rgba(0, 255, 157, 0.24);
  padding: 24px;
  box-shadow: var(--shadow);
}

.about-trust-claim {
  font-size: 18px;
  font-weight: 700;
  margin: 0;
}

.about-trust-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0;
}

.about-trust-meta {
  border-top: 1px solid var(--about-line);
  padding-top: 16px;
  margin-top: 8px;
  font-size: 14px;
  color: var(--c-muted);
}

.about-trust-meta p {
  margin: 4px 0;
}

.about-expand {
  margin-top: 20px;
  border: 1px solid var(--about-line);
  background: rgba(6, 10, 26, 0.55);
  padding: 14px 16px;
}

.about-expand summary {
  cursor: pointer;
  color: var(--c-fluor);
  font-weight: 700;
}

.about-expand[open] summary {
  margin-bottom: 8px;
}

.about-expand p {
  color: var(--c-muted);
  font-size: 14px;
  margin: 8px 0 0;
}

.about-expand a {
  color: var(--c-fluor);
}

@media (min-width: 640px) {
  .about-content .breadcrumb {
    padding: 20px 32px 0;
  }

  .about-hero {
    padding: 56px 32px 40px;
  }

  .about-hero-panel {
    grid-template-columns: repeat(5, 1fr);
  }

  .about-hero-fact:last-child {
    grid-column: auto;
  }

  .about-section {
    padding: 48px 32px;
  }

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

  .about-trust {
    padding: 40px 32px 64px;
  }

  .about-trust-card {
    padding: 32px;
  }
}

@media (min-width: 1024px) {
  .page-about {
    display: grid;
    grid-template-columns: var(--about-sidebar-w) minmax(0, 1fr);
    align-items: start;
  }

  .about-chapter-nav {
    position: sticky;
    top: var(--header-h);
    height: calc(100vh - var(--header-h));
    overflow-y: auto;
    border-bottom: 0;
    border-right: 2px solid rgba(0, 255, 157, 0.16);
    background: rgba(6, 10, 26, 0.5);
  }

  .about-chapter-nav-inner {
    height: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 24px;
    padding: 32px 20px;
  }

  .about-chapter-list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding: 0;
  }

  .about-chapter-link {
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    padding: 10px 12px;
    justify-content: flex-start;
  }

  .about-chapter-link:hover {
    border-left-color: var(--c-fluor);
    background: rgba(0, 255, 157, 0.06);
  }

  .about-nav-stats {
    display: grid;
    gap: 12px;
    margin-top: auto;
  }

  .about-nav-stat {
    border: 1px solid var(--about-line);
    padding: 12px;
    background: rgba(17, 34, 64, 0.6);
  }

  .about-nav-stat .stat-value {
    display: block;
    font-family: var(--font-data);
    font-size: 26px;
    color: var(--c-fluor);
  }

  .about-nav-stat .stat-label {
    font-size: 12px;
    color: var(--c-muted);
  }

  .about-content .breadcrumb {
    padding: 24px 48px 0;
  }

  .about-hero {
    padding: 72px 48px 48px;
  }

  .about-hero-grid {
    grid-template-columns: 1.35fr 0.65fr;
    align-items: stretch;
    gap: 40px;
  }

  .about-hero-panel {
    grid-template-columns: 1fr;
  }

  .about-hero-fact:last-child {
    grid-column: auto;
  }

  .about-section {
    padding: 64px 48px;
  }

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

  .about-compliance-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }

  .about-trust {
    padding: 40px 48px 80px;
  }
}

@media (min-width: 1440px) {
  .about-hero,
  .about-section,
  .about-trust {
    padding-right: 96px;
    padding-left: 96px;
  }
}