.page-about {
  background-color: var(--cream);
  position: relative;
}

.page-about .about-hero {
  position: relative;
  padding: 2rem 0 2.75rem;
  border-bottom: 2px solid var(--gold);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.1) 1px, transparent 1px);
  background-size: 32px 32px;
}

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

.page-about .about-hero-grid {
  display: grid;
  gap: 1.75rem;
  align-items: center;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  line-height: 1.18;
  color: var(--brown);
  margin: 0.75rem 0 0.5rem;
}

.page-about .about-hero-sub {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--red);
  margin: 0 0 0.75rem;
}

.page-about .about-hero-desc {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--brown);
  max-width: 34em;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

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

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

.page-about .caishen-seal {
  position: absolute;
  top: -1rem;
  right: 0.5rem;
  width: 56px;
  height: 56px;
  filter: drop-shadow(0 4px 6px rgba(123, 36, 28, 0.3));
}

.page-about .about-stat-list {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.page-about .about-stat-item {
  background: var(--brown);
  color: var(--cream);
  border-left: 4px solid var(--gold);
  padding: 1rem 1.1rem;
  min-height: 92px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-about .about-stat-item .hl-number {
  font-size: 2.4rem;
  line-height: 1;
  margin-bottom: 0.3rem;
}

.page-about .stat-unit {
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  color: var(--light-gold);
}

.page-about .about-layout {
  display: grid;
  gap: 2rem;
  padding-top: 2rem;
  padding-bottom: 3.5rem;
}

.page-about .about-sidebar-inner {
  background: var(--cream);
  border: 1px solid var(--gold);
  padding: 1.25rem;
}

.page-about .anchor-nav {
  margin-top: 1rem;
}

.page-about .anchor-nav ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-about .anchor-nav a {
  display: block;
  background: var(--light-gold);
  border: 1px solid var(--line-gold);
  color: var(--brown);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.45rem 0.8rem;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .anchor-nav a:hover {
  border-color: var(--gold);
  color: var(--red);
}

.page-about .map-legend {
  margin-top: 1.1rem;
}

.page-about .legend-dot-green {
  background-color: var(--green);
}

.page-about .legend-dot-gold {
  background-color: var(--gold);
}

.page-about .legend-dot-red {
  background-color: var(--red);
}

.page-about .sidebar-contact {
  display: block;
  width: 100%;
  box-sizing: border-box;
  text-align: center;
  margin-top: 1rem;
}

.page-about .about-main {
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
  padding-top: 2.5rem;
  border-top: 1px solid var(--line-gold);
}

.page-about .about-section h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  color: var(--brown);
  margin: 0.5rem 0 1rem;
}

.page-about .about-section h3 {
  font-family: var(--font-serif);
  font-weight: 900;
  color: var(--brown);
  margin: 0 0 0.5rem;
}

.page-about .about-section-intro {
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--brown);
  max-width: 46em;
  margin: 0 0 1.25rem;
}

.page-about .tag-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .about-note-card {
  background: var(--light-gold);
  border-left: 4px solid var(--gold);
  padding: 1rem 1.25rem;
  margin-top: 1.25rem;
}

.page-about .about-note-mark {
  display: inline-block;
  background: var(--red);
  color: var(--cream);
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.6rem;
  margin-bottom: 0.5rem;
}

.page-about .about-note-card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--brown);
}

.page-about .about-map-coords {
  margin-top: 1.25rem;
  border: 1px dashed var(--line-gold);
  padding: 1rem 1.1rem;
  background: var(--cream);
}

.page-about .about-map-coords > p {
  font-family: var(--font-serif);
  font-weight: 900;
  color: var(--brown);
  margin: 0 0 0.5rem;
}

.page-about .about-map-coords dl {
  margin: 0;
}

.page-about .about-map-coords dl div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.35rem 0;
  border-top: 1px dotted var(--line-gold);
}

.page-about .about-map-coords dt {
  color: var(--brown);
  font-weight: 600;
  font-size: 0.9rem;
}

.page-about .about-map-coords dd {
  margin: 0;
  color: var(--red);
  font-weight: 700;
  font-size: 0.9rem;
  text-align: right;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 79px;
  width: 2px;
  background: linear-gradient(180deg, var(--line-gold), var(--gold), var(--red));
}

.page-about .about-timeline-item {
  position: relative;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding-bottom: 1.35rem;
}

.page-about .timeline-coord {
  width: 56px;
  flex: 0 0 56px;
  text-align: right;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  color: var(--gold);
  padding-top: 1.15rem;
  white-space: nowrap;
}

.page-about .about-timeline-item::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 3px solid var(--cream);
  box-shadow: 0 0 0 2px var(--gold);
  background: var(--gold);
  flex: 0 0 14px;
  margin-top: 1.2rem;
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-item.is-current::before {
  background: var(--red);
  box-shadow: 0 0 0 2px var(--red), 0 0 0 5px var(--light-gold);
}

.page-about .timeline-card {
  flex: 1;
  background: var(--cream);
  border: 1px solid var(--line-gold);
  padding: 1rem 1.2rem 1.1rem;
}

.page-about .timeline-card p {
  margin: 0.35rem 0 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--brown);
}

.page-about .timeline-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.page-about .timeline-head h3 {
  margin: 0;
  font-size: 1.05rem;
}

.page-about .timeline-img {
  margin-top: 2rem;
}

.page-about .timeline-img img,
.page-about .ecosystem-card img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

.page-about .system-card {
  position: relative;
  background: var(--cream);
  border: 1px solid var(--line-gold);
  padding: 1.2rem 1.25rem 1.4rem;
  margin-bottom: 1.1rem;
  overflow: hidden;
}

.page-about .system-card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 0;
  height: 0;
  border-right: 24px solid var(--gold);
  border-top: 24px solid transparent;
}

.page-about .system-card-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
}

.page-about .system-card-head h3 {
  margin: 0;
  font-size: 1.08rem;
}

.page-about .system-card-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--brown);
  color: var(--yellow);
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 0.9rem;
  flex: 0 0 28px;
}

.page-about .system-card > p {
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--brown);
  margin: 0 0 0.75rem;
}

.page-about .system-card-list,
.page-about .ecosystem-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .system-card-list li,
.page-about .ecosystem-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--brown);
}

.page-about .system-card-list li::before,
.page-about .ecosystem-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.58em;
  width: 6px;
  height: 6px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .system-update-note {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: var(--brown);
  color: var(--cream);
  padding: 1rem 1.25rem;
  margin-top: 1.25rem;
}

.page-about .system-update-note p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-about .system-update-mark {
  flex: 0 0 auto;
  background: var(--gold);
  color: var(--brown);
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 0.9rem;
  padding: 0.15rem 0.55rem;
  white-space: nowrap;
}

.page-about .team-list {
  margin-top: 0.75rem;
}

.page-about .team-item {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line-gold);
}

.page-about .team-item:last-child {
  border-bottom: none;
}

.page-about .team-item h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
}

.page-about .team-item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--brown);
}

.page-about .team-code {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--brown);
  background: var(--light-gold);
  border: 1px solid var(--line-gold);
  padding: 0.3rem 0.55rem;
  flex: 0 0 auto;
  line-height: 1.1;
}

.page-about .ecosystem-card {
  border: 1px solid var(--line-gold);
  background: var(--cream);
  padding: 1.2rem;
  margin-top: 1.25rem;
}

.page-about .ecosystem-card .img-frame {
  margin-bottom: 1rem;
}

.page-about .ecosystem-card h3 {
  font-size: 1.05rem;
}

.page-about .ecosystem-card > p {
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--brown);
  margin: 0 0 0.75rem;
}

.page-about .contact-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
}

.page-about .contact-list li {
  background: var(--light-gold);
  border: 1px solid var(--line-gold);
  padding: 0.9rem 1rem;
  margin-bottom: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.page-about .contact-label {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--red);
}

.page-about .contact-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--brown);
  word-break: break-all;
}

.page-about .contact-note {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--brown);
  opacity: 0.82;
}

.page-about .trust-note {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--brown);
  background: var(--cream);
  border-left: 3px solid var(--orange);
  padding: 0.6rem 0.85rem;
  margin: 0.85rem 0 0.75rem;
}

.page-about .trust-icp {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--brown);
  margin: 0;
}

.page-about .trust-statement-box {
  background: var(--dark-red);
  color: var(--cream);
  padding: 1.4rem 1.5rem;
  margin: 1.25rem 0;
}

.page-about .trust-statement-mark {
  display: inline-block;
  background: var(--yellow);
  color: var(--brown);
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.6rem;
  margin-bottom: 0.75rem;
}

.page-about .trust-statement-box p {
  margin: 0.4rem 0;
  font-size: 0.96rem;
  line-height: 1.75;
}

.page-about .trust-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .trust-links a {
  display: inline-block;
  border: 1px solid var(--gold);
  color: var(--brown);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.4rem 0.85rem;
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .trust-links a:hover {
  background: var(--gold);
  color: var(--cream);
}

@media (min-width: 768px) {
  .page-about .about-stat-list {
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
  }

  .page-about .about-stat-item {
    min-height: 100px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (min-width: 921px) {
  .page-about .about-layout {
    grid-template-columns: 235px 1fr;
    gap: 2.75rem;
    align-items: start;
  }

  .page-about .about-sidebar {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
    align-self: start;
  }

  .page-about .anchor-nav ol {
    display: block;
  }

  .page-about .anchor-nav li + li {
    border-top: 1px solid var(--line-gold);
  }

  .page-about .anchor-nav a {
    background: none;
    border: none;
    font-size: 0.95rem;
    padding: 0.7rem 0.2rem;
  }

  .page-about .about-section {
    padding-top: 3rem;
  }

  .page-about .about-note-card {
    margin-top: 0;
  }

  .page-about .system-card {
    margin-bottom: 0;
  }

  .page-about .ecosystem-card {
    margin-top: 0;
  }
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .page-about .caishen-seal {
    animation: floatSeal 5s var(--ease) infinite;
  }

  .page-about .timeline-card,
  .page-about .system-card,
  .page-about .ecosystem-card,
  .page-about .team-item {
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
  }

  .page-about .timeline-card:hover,
  .page-about .system-card:hover,
  .page-about .ecosystem-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
  }

  .page-about .team-item:hover {
    transform: translateX(4px);
  }

  @keyframes floatSeal {
    0%,
    100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-7px);
    }
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .caishen-seal,
  .page-about .timeline-card,
  .page-about .system-card,
  .page-about .ecosystem-card,
  .page-about .team-item {
    animation: none;
    transform: none;
    transition: none;
  }
}