.page-about {
  --about-neon: #00FF6A;
  --about-orange: #FF6D00;
  --about-gold: #FFD700;
  --about-bg-panel: #101B3C;
  --about-steel: #1B2A4A;
  --about-muted: #8A94A6;
  --about-cloud: #F5F7FA;
  --about-bg-deep: #060D1F;
  position: relative;
  overflow-x: hidden;
  background: var(--color-bg, #0A1128);
  color: var(--color-cloud, #F5F7FA);
  font-family: var(--font-body, monospace);
  line-height: 1.6;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  max-width: var(--container, 80rem);
  margin: 0 auto;
  padding: 1rem 1.25rem 0;
  font-size: 0.8125rem;
  color: var(--about-muted);
}
.page-about .breadcrumb a {
  color: var(--about-neon);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.page-about .breadcrumb a:hover {
  border-bottom-color: var(--about-neon);
}
.page-about .breadcrumb-sep {
  color: var(--about-steel);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  max-width: calc(var(--container, 80rem) + 4rem);
  margin: 1.5rem auto 0;
  padding: 1.25rem;
}
.page-about .about-hero-left {
  position: relative;
  z-index: 2;
  max-width: 44rem;
}
.page-about .about-kicker {
  display: inline-block;
  margin: 0 0 0.75rem;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--about-bg-deep);
  background: var(--about-neon);
}
.page-about .about-title {
  margin: 0;
  font-family: var(--font-title, serif);
  font-size: clamp(1.9rem, 5.2vw, 3.6rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--about-cloud);
}
.page-about .about-lead {
  margin: 1.25rem 0 1.75rem;
  max-width: 36rem;
  font-family: var(--font-body, monospace);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--about-muted);
}
.page-about .about-hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.5rem;
  background: var(--about-neon);
  color: var(--about-bg-deep);
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border: 2px solid var(--about-neon);
}
.page-about .about-hero-cta:hover {
  background: transparent;
  color: var(--about-neon);
}
.page-about .about-hero-visual {
  position: relative;
  margin-top: 1.75rem;
  min-height: 380px;
  overflow: hidden;
}
.page-about .about-hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.6) contrast(1.1) brightness(0.55);
  border: 2px solid var(--about-steel);
}
.page-about .about-hero-num {
  position: absolute;
  right: -0.05em;
  bottom: -0.12em;
  z-index: 2;
  font-family: var(--font-title, serif);
  font-size: clamp(8rem, 22vw, 19rem);
  font-weight: 900;
  line-height: 0.8;
  color: var(--about-neon);
  text-shadow: 0 0 2.5rem rgba(0, 255, 106, 0.35), 8px 8px 0 var(--about-bg-deep);
}
.page-about .about-hero-flare {
  position: absolute;
  top: -2.5rem;
  left: 20%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(255, 109, 0, 0.5) 0%, transparent 62%);
  z-index: 1;
  pointer-events: none;
}

/* 章节通用 */
.page-about .about-chapter {
  max-width: calc(var(--container, 80rem) + 4rem);
  margin: 0 auto;
  padding: 3.5rem 1.25rem;
}
.page-about .about-chapter-head {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--about-steel);
  padding-bottom: 1.25rem;
}
.page-about .about-chapter-num {
  font-family: var(--font-title, serif);
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--about-neon);
  white-space: nowrap;
}
.page-about .about-chapter-title {
  margin: 0;
  font-family: var(--font-title, serif);
  font-size: clamp(1.45rem, 3.2vw, 2.2rem);
  font-weight: 800;
  color: var(--about-cloud);
}
.page-about .about-chapter-sub {
  margin: 0.25rem 0 0;
  font-family: var(--font-body, monospace);
  font-size: 0.8125rem;
  color: var(--about-muted);
}

/* 01 我们的主场 */
.page-about .about-home-grid {
  display: grid;
  gap: 1.75rem;
}
.page-about .about-home-statement p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-cloud);
  max-width: 42rem;
}
.page-about .about-home-points {
  display: grid;
  gap: 0.875rem;
}
.page-about .about-home-point {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem;
  background: var(--about-bg-panel);
  border-left: 4px solid var(--about-neon);
}
.page-about .about-home-point-num {
  font-family: var(--font-title, serif);
  font-weight: 900;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--about-neon);
}
.page-about .about-home-point h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--about-cloud);
}
.page-about .about-home-point p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--about-muted);
}

/* 02 数据规模 */
.page-about .about-data {
  position: relative;
}
.page-about .about-data-bg {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-steel);
  min-height: 280px;
  margin-bottom: 2rem;
}
.page-about .about-data-bg img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  filter: brightness(0.4) saturate(0.3);
}
.page-about .about-data-bg-label {
  position: absolute;
  bottom: 0.75rem;
  left: 0.75rem;
  z-index: 2;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--about-neon);
  background: rgba(10, 17, 40, 0.65);
  padding: 0.25rem 0.5rem;
}
.page-about .about-data-stats {
  display: grid;
  gap: 1rem;
}
.page-about .about-stat-card {
  position: relative;
  padding: 1.5rem 1.25rem;
  background: var(--about-bg-panel);
  border: 1px solid var(--about-steel);
  box-shadow: 6px 6px 0 var(--about-steel);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.page-about .about-stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 10px 10px 0 var(--about-steel);
}
.page-about .about-stat-card .stat-number {
  display: block;
  font-family: var(--font-title, serif);
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--about-neon);
}
.page-about .about-stat-card .stat-mini {
  font-size: 1.2rem;
  margin-left: 0.25rem;
}
.page-about .about-stat-card .stat-label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--about-gold);
}
.page-about .about-stat-card p {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: var(--about-muted);
}

/* 03 维护里程碑 */
.page-about .about-history {
  position: relative;
}
.page-about .about-history-band {
  border-top: 2px solid var(--about-steel);
  border-bottom: 2px solid var(--about-steel);
  background: linear-gradient(115deg, var(--about-bg-panel) 0%, var(--about-bg-deep) 100%);
}
.page-about .about-milestone-wrap {
  overflow-x: hidden;
}
.page-about .about-milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.875rem;
}
.page-about .about-milestone-card {
  background: rgba(16, 27, 60, 0.72);
  border: 1px solid var(--about-steel);
  border-left: 4px solid var(--about-neon);
}
.page-about .about-milestone-card summary {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 0.875rem 1rem;
  cursor: pointer;
  list-style: none;
}
.page-about .about-milestone-card summary::-webkit-details-marker {
  display: none;
}
.page-about .about-milestone-card summary::before {
  content: "＋";
  flex: 0 0 auto;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--about-steel);
  color: var(--about-neon);
  font-size: 0.875rem;
}
.page-about .about-milestone-card[open] summary::before {
  content: "－";
}
.page-about .about-round {
  flex: 0 0 auto;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--about-bg-deep);
  background: var(--about-neon);
  padding: 0.2rem 0.5rem;
}
.page-about .about-milestone-title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--about-cloud);
}
.page-about .about-milestone-card p {
  margin: 0;
  padding: 0 1rem 1rem 3.375rem;
  font-size: 0.875rem;
  color: var(--about-muted);
}
.page-about .about-mobile-figure {
  margin-top: 1.75rem;
  text-align: center;
}
.page-about .about-mobile-figure img {
  max-width: 260px;
  width: 100%;
  border: 2px solid var(--about-steel);
  box-shadow: 12px 12px 0 rgba(255, 109, 0, 0.25);
}

/* 04 资质与认证 */
.page-about .about-legal-grid {
  display: grid;
  gap: 1rem;
}
.page-about .about-legal-card {
  padding: 1.5rem 1.25rem;
  background: var(--about-bg-panel);
  border: 1px solid var(--about-steel);
  border-top: 4px solid var(--about-steel);
}
.page-about .about-legal-card:hover {
  border-top-color: var(--about-neon);
}
.page-about .about-legal-card .tag {
  display: inline-block;
  font-size: 0.703125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.625rem;
  text-transform: uppercase;
}
.page-about .about-legal-card .tag-neon {
  color: var(--about-bg-deep);
  background: var(--about-neon);
}
.page-about .about-legal-card .tag-gold {
  color: var(--about-bg-deep);
  background: var(--about-gold);
}
.page-about .about-legal-value {
  margin: 0.875rem 0 0.375rem;
  font-family: var(--font-title, serif);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--about-cloud);
}
.page-about .about-legal-note {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--about-muted);
}

/* 05 用户价值 */
.page-about .about-value-grid {
  display: grid;
  gap: 1rem;
}
.page-about .about-value-card {
  position: relative;
  padding: 1.5rem 1.25rem 1.25rem;
  background: var(--about-bg-panel);
  overflow: hidden;
}
.page-about .about-value-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, rgba(255, 109, 0, 0.3) 0%, transparent 72%);
  pointer-events: none;
}
.page-about .about-value-card h3 {
  margin: 0 0 0.625rem;
  font-family: var(--font-title, serif);
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--about-cloud);
}
.page-about .about-value-card p {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  color: var(--about-muted);
}
.page-about .about-value-link {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--about-neon);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}
.page-about .about-value-link:hover {
  border-bottom-color: var(--about-neon);
}

@media (min-width: 48rem) {
  .page-about .about-hero {
    flex-direction: row;
    align-items: flex-end;
    gap: 3rem;
    min-height: 520px;
    padding: 2.5rem 2rem 2rem;
  }
  .page-about .about-hero-left {
    flex: 0 0 46%;
  }
  .page-about .about-hero-visual {
    flex: 1;
    margin-top: 0;
    min-height: 420px;
  }
  .page-about .about-chapter {
    padding: 5rem 2rem;
  }
  .page-about .about-home-grid {
    grid-template-columns: 5fr 4fr;
    gap: 3rem;
  }
  .page-about .about-data-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .page-about .about-milestone-list {
    grid-template-columns: 1fr;
  }
  .page-about .about-legal-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .page-about .about-value-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 64rem) {
  .page-about .about-history {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 3rem;
  }
  .page-about .about-milestone-wrap {
    order: 1;
  }
  .page-about .about-mobile-figure {
    order: 2;
    margin-top: 0;
    align-self: start;
  }
  .page-about .about-mobile-figure img {
    max-width: 100%;
  }
  .page-about .about-value-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-data {
    display: grid;
    grid-template-columns: 5fr 7fr;
    gap: 3rem;
  }
  .page-about .about-data-bg {
    margin-bottom: 0;
    min-height: 420px;
  }
  .page-about .about-data-stats {
    grid-template-columns: 1fr;
    align-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
    box-shadow: none !important;
  }
}