.page-about {
  --display-heading: clamp(2.6rem, 6vw, 4.2rem);
  --section-pad: clamp(4rem, 8vw, 7rem);
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-headline);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin-top: 0;
}

.page-about p {
  margin-top: 0;
}

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

.page-about .page-hero {
  position: relative;
  padding: calc(var(--header-h) + var(--space-lg)) 0 var(--space-xl);
  background:
    radial-gradient(circle at 82% 10%, rgba(0, 229, 255, 0.12), transparent 38%),
    var(--color-primary);
  overflow: hidden;
}

.page-about .page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.55;
  pointer-events: none;
}

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

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-lg);
}

.page-about .breadcrumb a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--color-accent);
}

.page-about .breadcrumb__sep {
  color: rgba(255, 255, 255, 0.4);
}

.page-about .page-hero__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.page-about .page-hero__meta .data-text {
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--color-cyan);
}

.page-about .about-hero__title-break {
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-accent);
  margin: var(--space-sm) 0;
}

.page-about .page-hero__title {
  font-size: var(--display-heading);
  line-height: 1.08;
  max-width: 14em;
  margin-bottom: var(--space-md);
}

.page-about .about-hero__title-sub {
  display: block;
  font-size: 0.58em;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: rgba(255, 255, 255, 0.88);
  margin-top: var(--space-xs);
}

.page-about .page-hero__lead {
  max-width: 44rem;
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 0;
}

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

/* 品牌故事 */
.page-about .about-story {
  background: var(--color-cream);
  color: var(--color-ink);
  padding: var(--section-pad) 0;
}

.page-about .about-story__grid {
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}

.page-about .about-story__content h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.7rem);
  margin: var(--space-sm) 0 var(--space-md);
}

.page-about .about-story__content p {
  color: rgba(26, 26, 26, 0.78);
  margin-bottom: var(--space-sm);
}

.page-about .about-story__content blockquote {
  margin: var(--space-md) 0;
  padding-left: var(--space-md);
  border-left: 3px solid var(--color-accent);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
}

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

.page-about .about-story__media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(10, 27, 61, 0.14);
  border-radius: var(--radius-lg);
  pointer-events: none;
}

.page-about .about-story__media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

/* 章节标题统一 */
.page-about .about-chapter {
  margin-bottom: var(--space-xl);
}

.page-about .about-chapter .chapter__title {
  margin: var(--space-sm) 0;
}

.page-about .about-chapter .chapter__lead {
  max-width: 42rem;
  color: inherit;
  opacity: 0.78;
}

/* 发展里程碑 */
.page-about .about-timeline {
  position: relative;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--section-pad) 0;
  overflow: hidden;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.5;
  pointer-events: none;
}

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

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 24px;
  top: 24px;
  bottom: 24px;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-cyan) 100%);
  opacity: 0.8;
}

.page-about .timeline__item {
  position: relative;
  padding-left: 64px;
  margin-bottom: var(--space-lg);
}

.page-about .timeline__node {
  position: absolute;
  left: 24px;
  top: 18px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-primary);
  transform: translateX(-50%);
  box-shadow: 0 0 0 4px rgba(255, 90, 60, 0.22);
  z-index: 1;
}

.page-about .timeline__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--color-cyan);
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
}

.page-about .timeline__year {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.page-about .timeline__card {
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
  padding: var(--space-md);
  backdrop-filter: blur(6px);
  overflow: hidden;
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.page-about .timeline__card h3 {
  font-size: 1.4rem;
  margin-bottom: var(--space-xs);
}

.page-about .timeline__card p {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: var(--space-sm);
}

.page-about .timeline__card::after {
  content: "";
  position: absolute;
  top: -20px;
  right: -18px;
  width: 90px;
  height: 3px;
  background: var(--color-accent);
  transform: rotate(-42deg);
}

.page-about .timeline__card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 229, 255, 0.4);
  transform: translateY(-4px);
}

.page-about .timeline__tag {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.5);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: var(--space-xs);
  margin-top: var(--space-sm);
}

/* 数据与团队 */
.page-about .about-data {
  position: relative;
  background: var(--color-secondary);
  color: var(--color-white);
  padding: var(--section-pad) 0;
  overflow: hidden;
}

.page-about .about-data__rings {
  position: absolute;
  right: -80px;
  bottom: -80px;
  width: 320px;
  height: 320px;
  opacity: 0.5;
  pointer-events: none;
}

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

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

.page-about .about-data__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

.page-about .about-stat {
  position: relative;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: background 0.2s ease, transform 0.2s ease;
}

.page-about .about-stat:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-3px);
}

.page-about .about-stat::before {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-cyan);
  box-shadow: 0 0 10px var(--color-cyan);
  opacity: 0.7;
}

.page-about .about-stat__value {
  display: block;
  font-weight: 800;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  color: var(--color-white);
  line-height: 1.2;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 5px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.65);
}

.page-about .about-data__chart {
  margin: 0;
}

.page-about .about-data__chart img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-data__team {
  display: grid;
  gap: var(--space-sm);
}

.page-about .about-data__team-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 3px solid var(--color-cyan);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition: background 0.2s ease;
}

.page-about .about-data__team-card:hover {
  background: rgba(255, 255, 255, 0.08);
}

.page-about .about-data__team-card h3 {
  font-size: 1.2rem;
  margin: var(--space-xs) 0;
}

.page-about .about-data__team-card p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.66);
  margin-bottom: 0;
}

/* 资质与荣誉 */
.page-about .about-honors {
  position: relative;
  background-color: var(--color-cream);
  color: var(--color-ink);
  padding: var(--section-pad) 0;
  background-image:
    linear-gradient(rgba(26, 26, 26, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 26, 26, 0.04) 1px, transparent 1px);
  background-size: 72px 72px;
}

.page-about .about-honors .chapter__lead {
  color: rgba(26, 26, 26, 0.7);
}

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

.page-about .honor-card {
  background: var(--color-white);
  border: 1px solid rgba(10, 27, 61, 0.1);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: var(--space-md);
  box-shadow: 0 4px 16px rgba(10, 27, 61, 0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .honor-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 14px 28px rgba(10, 27, 61, 0.12);
}

.page-about .honor-card__status {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  border: 1px solid rgba(255, 90, 60, 0.3);
  border-radius: 999px;
  padding: 4px 10px;
  margin-bottom: var(--space-sm);
}

.page-about .honor-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.page-about .honor-card p {
  font-size: 0.9rem;
  color: rgba(26, 26, 26, 0.7);
  margin-bottom: 0;
}

.page-about .about-honors__media {
  margin: var(--space-lg) auto 0;
  max-width: 620px;
}

.page-about .about-honors__media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

/* 下一步探索 */
.page-about .about-next {
  position: relative;
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--section-pad) 0;
  overflow: hidden;
}

.page-about .about-next::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-cyan) 100%);
}

.page-about .about-next .site-container {
  position: relative;
}

.page-about .about-next__inner {
  display: grid;
  gap: var(--space-lg);
}

.page-about .about-next__content h2 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin: var(--space-sm) 0;
}

.page-about .about-next__content p {
  max-width: 32rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.page-about .about-next__sub-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

.page-about .about-next__sub-links a {
  color: var(--color-cyan);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  border-bottom: 1px solid rgba(0, 229, 255, 0.3);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-next__sub-links a:hover {
  color: var(--color-accent);
  border-color: rgba(255, 90, 60, 0.4);
}

/* 响应式 */
@media (min-width: 560px) {
  .page-about .about-data__stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 760px) {
  .page-about .honor-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-next__links {
    flex-wrap: nowrap;
  }
}

@media (min-width: 900px) {
  .page-about .about-story__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-xl);
  }

  .page-about .about-hero__lines {
    display: block;
    position: absolute;
    right: -4%;
    top: 20%;
    width: 380px;
    height: 380px;
    pointer-events: none;
    z-index: 0;
  }

  .page-about .about-hero__line {
    position: absolute;
    display: block;
    height: 2px;
    transform-origin: left center;
  }

  .page-about .about-hero__line--accent {
    background: var(--color-accent);
    transform: rotate(-35deg);
    top: 60px;
    width: 100%;
  }

  .page-about .about-hero__line--cyan {
    background: var(--color-cyan);
    transform: rotate(-24deg);
    top: 110px;
    width: 230px;
  }
}

@media (min-width: 960px) {
  .page-about .about-data__layout {
    grid-template-columns: 0.9fr 1.1fr;
    grid-template-areas:
      "stats chart"
      "team chart";
  }

  .page-about .about-data__stats {
    grid-area: stats;
    align-content: start;
  }

  .page-about .about-data__chart {
    grid-area: chart;
    align-self: stretch;
  }

  .page-about .about-data__team {
    grid-area: team;
    align-content: start;
  }

  .page-about .about-next__inner {
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: var(--space-xl);
  }

  .page-about .about-next__links {
    justify-content: flex-end;
  }

  .page-about .about-next__sub-links {
    justify-content: flex-end;
  }
}