.page-about {
  --about-ink: #0B1D3A;
  --about-body: #1E2A44;
  --about-muted: #5A6F88;
  --about-rule: rgba(176, 196, 222, 0.32);
  --about-paper: rgba(245, 247, 250, 0.04);
  --about-paper-deep: rgba(245, 247, 250, 0.07);

  background:
    radial-gradient(ellipse at 82% -8%, rgba(57, 255, 136, 0.09), transparent 42%),
    radial-gradient(ellipse at 8% 65%, rgba(255, 122, 24, 0.055), transparent 46%),
    var(--dark-background);
  color: var(--text-light);
  font-family: var(--body-family);
  line-height: 1.65;
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 2.25rem;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

.page-about .breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--neon-green);
}

.page-about .breadcrumb-sep {
  color: var(--text-secondary);
  opacity: 0.7;
}

.page-about .breadcrumb-current {
  color: var(--neon-green);
}

/* Hero 头部 */
.page-about .about-hero {
  padding: 2.75rem 0 1.5rem;
}

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

.page-about .about-hero-main {
  max-width: 780px;
}

.page-about .about-hero h1 {
  margin: 0.75rem 0 1.15rem;
  font-family: var(--heading-family);
  font-size: clamp(2.1rem, 5vw, 3.9rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text-light);
}

.page-about .about-hero-desc {
  max-width: 62ch;
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

.page-about .about-hero-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.7rem;
  font-family: var(--heading-family);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border-left: 1px solid var(--about-rule);
  padding-left: 1.1rem;
}

.page-about .about-hero-year {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--neon-green);
}

.page-about .about-hero-ver {
  color: var(--text-secondary);
}

/* 图录通用 */
.page-about .about-figure {
  margin-block: 1.75rem 2.5rem;
}

.page-about .about-figure img,
.page-about .capability-chart img,
.page-about .honor-texture img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--about-rule);
}

.page-about figure figcaption {
  display: block;
  margin-top: 0.65rem;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* 展览章节 */
.page-about .about-chapter {
  position: relative;
  padding-block: 3rem 4.25rem;
}

.page-about .chapter-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem 1.5rem;
  align-items: end;
  margin-bottom: 2.75rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .chapter-index {
  line-height: 0.85;
}

.page-about .chapter-num {
  display: block;
  font-family: var(--heading-family);
  font-size: clamp(4rem, 12vw, 6.5rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 0.82;
  color: var(--neon-green);
}

@supports (-webkit-text-stroke: 1px var(--neon-green)) {
  .page-about .chapter-num {
    color: transparent;
    -webkit-text-stroke: 1.5px var(--neon-green);
  }
}

.page-about .chapter-title-group h2 {
  margin: 0;
  font-family: var(--heading-family);
  font-size: clamp(1.65rem, 3.6vw, 2.85rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text-light);
}

.page-about .chapter-label {
  color: var(--neon-green);
}

.page-about .eyebrow {
  margin: 0 0 0.4rem;
}

/* 章节01 品牌缘起 */
.page-about .origin-layout {
  display: grid;
  gap: 2rem;
}

.page-about .origin-copy {
  position: relative;
  padding-right: 1.25rem;
}

.page-about .origin-copy p {
  margin: 0 0 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 66ch;
}

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

.page-about .vertical-note {
  position: absolute;
  top: 0.1rem;
  right: 0;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--heading-family);
  font-size: 0.65rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--neon-green);
  opacity: 0.72;
}

.page-about .origin-plate {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 2rem 1.5rem 1.75rem;
  background: linear-gradient(150deg, rgba(57, 255, 136, 0.08), rgba(255, 122, 24, 0.04));
  border: 1px solid var(--about-rule);
  border-top: 4px solid var(--neon-green);
  border-radius: 6px;
}

.page-about .origin-plate::after {
  content: '';
  position: absolute;
  left: 12px;
  right: -9px;
  bottom: -11px;
  height: 11px;
  background: rgba(176, 196, 222, 0.08);
  border: 1px solid var(--about-rule);
  border-radius: 0 0 6px 6px;
  z-index: -1;
}

.page-about .plate-title {
  font-family: var(--heading-family);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-about .origin-plate strong {
  font-family: var(--heading-family);
  font-size: 1.35rem;
  line-height: 1.45;
  font-weight: 800;
  color: var(--text-light);
}

.page-about .plate-num {
  font-family: var(--heading-family);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  color: var(--neon-green);
}

/* 章节02 发展里程碑 */
.page-about .milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .milestone-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
  margin: 0;
  padding: 0 0 2.5rem 1.6rem;
  border-left: 1px solid var(--about-rule);
}

.page-about .milestone-item:last-child {
  padding-bottom: 0.5rem;
}

.page-about .milestone-item::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 0.4rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 136, 0.14), 0 0 16px rgba(57, 255, 136, 0.4);
}

.page-about .milestone-meta {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  font-family: var(--heading-family);
}

.page-about .milestone-version {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--neon-green);
  letter-spacing: 0.04em;
}

.page-about .milestone-year {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.page-about .milestone-content {
  padding: 1.2rem 1.25rem;
  border: 1px solid var(--about-rule);
  border-radius: 8px;
  background: var(--about-paper);
  transition: border-color 0.3s ease, background 0.3s ease;
}

.page-about .milestone-item:hover .milestone-content {
  border-color: rgba(57, 255, 136, 0.48);
  background: var(--about-paper-deep);
}

.page-about .milestone-content h3 {
  margin: 0 0 0.55rem;
  font-family: var(--heading-family);
  font-size: 1.18rem;
  line-height: 1.35;
  font-weight: 800;
  color: var(--text-light);
}

.page-about .milestone-content p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* 章节03 数据服务能力 —— 浅色纸张区 */
.page-about .about-capability {
  background: var(--light-background);
  color: var(--about-body);
}

.page-about .about-capability .chapter-head {
  border-bottom-color: rgba(11, 29, 58, 0.16);
}

.page-about .about-capability .chapter-num {
  color: var(--deep-space);
}

@supports (-webkit-text-stroke: 1px var(--deep-space)) {
  .page-about .about-capability .chapter-num {
    color: transparent;
    -webkit-text-stroke: 1.5px var(--deep-space);
  }
}

.page-about .about-capability .chapter-title-group h2 {
  color: var(--about-ink);
}

.page-about .about-capability .chapter-label {
  color: var(--orange-red);
}

.page-about .about-capability .eyebrow {
  color: var(--about-muted);
}

.page-about .capability-grid {
  display: grid;
  gap: 2rem;
}

.page-about .capability-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.9rem;
}

.page-about .stat-card {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1.35rem 1rem;
  background: #FFFFFF;
  border: 1px solid rgba(11, 29, 58, 0.1);
  border-radius: 8px;
  box-shadow: 0 1px 0 rgba(11, 29, 58, 0.05);
}

.page-about .stat-num {
  font-family: var(--heading-family);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1;
  color: var(--deep-space);
}

.page-about .stat-num small {
  font-size: 0.6em;
  color: var(--orange-red);
}

.page-about .stat-label {
  margin-top: 0.4rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--about-body);
}

.page-about .stat-desc {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--about-muted);
}

.page-about .capability-chart {
  margin: 0;
}

.page-about .capability-note {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(11, 29, 58, 0.14);
}

.page-about .capability-note-text p {
  margin: 0 0 0.85rem;
  color: var(--about-body);
  font-size: 0.98rem;
  line-height: 1.75;
}

.page-about .capability-note-text p:last-child {
  margin-bottom: 0;
}

.page-about .capability-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
}

/* 章节04 资质与荣誉 */
.page-about .honor-grid {
  display: grid;
  gap: 1.5rem;
}

.page-about .honor-card {
  perspective: 1200px;
  min-height: 270px;
}

.page-about .honor-card-inner {
  position: relative;
  width: 100%;
  min-height: 270px;
  transform-style: preserve-3d;
  transition: transform 0.65s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.page-about .honor-card:hover .honor-card-inner,
.page-about .honor-card:focus-within .honor-card-inner {
  transform: rotateY(180deg);
}

.page-about .honor-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 1.75rem;
  text-align: center;
  border-radius: 12px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border: 1px solid var(--about-rule);
}

.page-about .honor-face::before {
  content: '';
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(176, 196, 222, 0.3);
  border-radius: 8px;
  pointer-events: none;
}

.page-about .honor-face-front {
  background: linear-gradient(150deg, rgba(176, 196, 222, 0.1), rgba(245, 247, 250, 0.04));
}

.page-about .honor-face-back {
  background: linear-gradient(150deg, rgba(57, 255, 136, 0.14), rgba(255, 122, 24, 0.1));
  transform: rotateY(180deg);
}

.page-about .honor-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid var(--neon-green);
  font-size: 1.4rem;
  color: var(--neon-green);
}

.page-about .honor-face h3 {
  margin: 0;
  font-family: var(--heading-family);
  font-size: 1.25rem;
  line-height: 1.3;
  font-weight: 800;
  color: var(--text-light);
}

.page-about .honor-face p {
  margin: 0;
  max-width: 34ch;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

.page-about .honor-dossier {
  display: grid;
  gap: 1.5rem;
  margin-top: 3rem;
  padding: 1.5rem;
  background: var(--about-paper);
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--orange-red);
  border-radius: 8px;
}

.page-about .honor-texture {
  margin: 0;
}

.page-about .honor-text h3 {
  margin: 0 0 0.8rem;
  font-family: var(--heading-family);
  font-size: 1.4rem;
  line-height: 1.3;
  color: var(--text-light);
}

.page-about .honor-text p {
  margin: 0 0 0.9rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* 桌面端布局 */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding-top: 3.5rem;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 2fr 1fr;
    align-items: end;
    gap: 3rem;
  }

  .page-about .about-hero-meta {
    align-items: flex-end;
    border-left: 0;
    border-right: 1px solid var(--about-rule);
    padding-left: 0;
    padding-right: 1.1rem;
    text-align: right;
  }

  .page-about .about-figure {
    margin-block: 2.25rem 3.5rem;
  }

  .page-about .about-chapter {
    padding-block: 4rem 5.25rem;
  }

  .page-about .chapter-head {
    grid-template-columns: 170px 1fr;
  }

  .page-about .origin-layout {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 3rem;
  }

  .page-about .milestone-item {
    grid-template-columns: 160px 1fr;
    gap: 2.25rem;
    padding-left: 2.6rem;
  }

  .page-about .milestone-content h3 {
    font-size: 1.28rem;
  }

  .page-about .capability-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 2.5rem;
  }

  .page-about .capability-stats {
    gap: 1rem;
  }

  .page-about .capability-note {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 2rem;
  }

  .page-about .honor-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }

  .page-about .honor-dossier {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
  }
}

@media (min-width: 1024px) {
  .page-about .origin-copy p {
    font-size: 1.05rem;
  }

  .page-about .capability-note-text p {
    font-size: 1.02rem;
  }

  .page-about .honor-text p {
    font-size: 1rem;
  }
}

/* 减少动态效果：关闭翻转，让正反两面以静态方式展示 */
@media (prefers-reduced-motion: reduce) {
  .page-about .honor-card,
  .page-about .honor-card-inner {
    min-height: 0;
    perspective: none;
  }

  .page-about .honor-card-inner {
    display: block;
    transform: none;
    transition: none;
    transform-style: flat;
  }

  .page-about .honor-face {
    position: relative;
    inset: auto;
    transform: none;
    backface-visibility: visible;
    -webkit-backface-visibility: visible;
    margin-bottom: 1rem;
  }

  .page-about .honor-face-back {
    transform: none;
  }

  .page-about .honor-card:hover .honor-card-inner,
  .page-about .honor-card:focus-within .honor-card-inner {
    transform: none;
  }
}