.page-about {
  --page-accent: var(--color-red);
  --page-accent-alt: var(--color-yellow);
  --page-bg-alt: var(--color-light-gray);
  --page-timeline-line: var(--color-gold);
  --page-card-shadow: var(--shadow-sm);
  --page-card-radius: var(--radius-lg);
  --page-timeline-dot-size: 1.2rem;
  --page-spacer: var(--space-xl);
  background-color: var(--color-white);
  color: var(--color-dark-blue);
  font-family: var(--font-body);
}

/* 面包屑 */
.page-about .breadcrumb {
  padding-top: var(--space-md);
  padding-bottom: var(--space-sm);
  font-size: var(--space-sm);
  color: var(--color-blue);
}
.page-about .breadcrumb a {
  color: var(--color-blue);
  text-decoration: none;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus {
  color: var(--color-red);
  text-decoration: underline;
}

/* 首屏 杂志式左右布局 */
.page-about .hero-intro {
  padding: var(--space-lg) 0 0;
}
.page-about .hero-intro__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: var(--space-lg);
}
.page-about .hero-intro__sidebar {
  flex: 0 0 220px;
  max-width: 220px;
  border-right: 2px solid var(--color-gold);
  padding-right: var(--space-lg);
}
.page-about .hero-intro__heading {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-red);
  margin: 0 0 var(--space-sm);
  letter-spacing: 0.02em;
}
.page-about .hero-intro__subtitle {
  font-size: 0.9rem;
  color: var(--color-blue);
  font-style: italic;
  margin: 0;
  line-height: 1.5;
  border-left: 3px solid var(--color-yellow);
  padding-left: var(--space-sm);
}
.page-about .hero-intro__main {
  flex: 1;
  min-width: 240px;
}
.page-about .hero-intro__image-wrap {
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.page-about .hero-intro__image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .hero-intro__text {
  --text-spacing: 1.2rem;
}
.page-about .hero-intro__lead {
  font-size: 1.125rem;
  line-height: 1.7;
  font-weight: 600;
  color: var(--color-dark-blue);
  margin-bottom: var(--text-spacing);
}
.page-about .hero-intro__text p {
  line-height: 1.7;
  margin: 0 0 var(--text-spacing);
  max-width: 680px;
}
.page-about .hero-intro__text p:last-child {
  margin-bottom: 0;
}

/* 时间轴区域 */
.page-about .section-timeline {
  padding: var(--page-spacer) 0;
  background: var(--page-bg-alt);
}
.page-about .section-timeline__header {
  margin-bottom: var(--space-lg);
  max-width: 700px;
}
.page-about .section-timeline__header .section-title {
  color: var(--color-dark-blue);
  margin: 0;
}
.page-about .section-timeline__header .section-subtitle {
  color: var(--color-blue);
  margin: var(--space-xs) 0 0;
}
.page-about .timeline {
  position: relative;
  padding-left: var(--space-lg);
  margin: 0;
}
.page-about .timeline::before {
  content: '';
  position: absolute;
  left: calc(var(--space-lg) / 2 - 1px);
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--page-timeline-line);
  opacity: 0.5;
}
.page-about .timeline__item {
  position: relative;
  margin-bottom: var(--space-lg);
  padding-left: var(--space-md);
}
.page-about .timeline__item:last-child {
  margin-bottom: 0;
}
.page-about .timeline__marker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  padding: var(--space-xs) 0;
  transition: color var(--transition);
}
.page-about .timeline__marker:hover,
.page-about .timeline__marker:focus-visible {
  color: var(--color-red);
}
.page-about .timeline__dot {
  display: inline-block;
  width: var(--page-timeline-dot-size);
  height: var(--page-timeline-dot-size);
  border-radius: 50%;
  background: var(--color-red);
  border: 3px solid var(--color-gold);
  box-shadow: 0 0 0 2px var(--color-white), 0 0 0 4px var(--color-gold);
  flex-shrink: 0;
  transition: transform var(--transition), background var(--transition);
}
.page-about .timeline__marker:hover .timeline__dot,
.page-about .timeline__marker:focus-visible .timeline__dot {
  transform: scale(1.3);
  background: var(--color-yellow);
}
.page-about .timeline__label {
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-dark-blue);
}
.page-about .timeline__content {
  margin-top: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--page-card-shadow);
  display: none;
}
.page-about .timeline__item[data-timeline-node] .timeline__content {
  display: block;
}
.page-about .timeline__title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin: 0 0 var(--space-xs);
  color: var(--color-dark-blue);
}
.page-about .timeline__content p {
  line-height: 1.7;
  margin: 0 0 var(--space-sm);
  max-width: 600px;
}
.page-about .timeline__img-wrap {
  margin-top: var(--space-sm);
  border-radius: var(--radius-sm);
  overflow: hidden;
  max-width: 600px;
}
.page-about .timeline__img-wrap img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 数据的力量 区块 */
.page-about .section-data {
  padding: var(--page-spacer) 0;
}
.page-about .section-data__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  align-items: center;
}
.page-about .section-data__text {
  flex: 1 1 280px;
  min-width: 240px;
}
.page-about .section-data__title {
  color: var(--color-dark-blue);
  margin: 0;
}
.page-about .section-data__text .section-subtitle {
  color: var(--color-blue);
  margin: var(--space-xs) 0 var(--space-md);
}
.page-about .section-data__desc {
  line-height: 1.7;
  margin-bottom: var(--space-md);
  max-width: 600px;
}
.page-about .section-data__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.page-about .section-data__visual {
  flex: 1 1 300px;
  min-width: 240px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.page-about .section-data__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 为球迷而生 区块 */
.page-about .section-fan {
  padding: var(--page-spacer) 0;
  background: linear-gradient(135deg, var(--color-light-gray) 0%, var(--color-white) 80%);
}
.page-about .section-fan__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
}
.page-about .section-fan__sidebar {
  flex: 0 0 220px;
  max-width: 220px;
}
.page-about .section-fan__title {
  color: var(--color-red);
  margin: 0;
}
.page-about .section-fan__sub {
  color: var(--color-blue);
  margin: var(--space-xs) 0 var(--space-md);
}
.page-about .section-fan__icon {
  margin-top: var(--space-md);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  max-width: 220px;
}
.page-about .section-fan__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .section-fan__main {
  flex: 1;
  min-width: 240px;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}
.page-about .fan-card {
  background: var(--color-white);
  border-radius: var(--page-card-radius);
  padding: var(--space-lg);
  box-shadow: var(--page-card-shadow);
  transition: box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
  border-left: 4px solid transparent;
}
.page-about .fan-card:hover,
.page-about .fan-card:focus-visible {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-left-color: var(--color-gold);
}
.page-about .fan-card__heading {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  margin: 0 0 var(--space-sm);
  color: var(--color-dark-blue);
}
.page-about .fan-card__summary {
  font-size: 0.95rem;
  color: var(--color-blue);
  margin: 0 0 var(--space-sm);
  line-height: 1.5;
}
.page-about .fan-card__detail {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-light-gray);
}
.page-about .fan-card__detail p {
  line-height: 1.6;
  margin: 0 0 var(--space-sm);
}
.page-about .fan-card__detail .btn {
  margin-top: var(--space-sm);
}

/* 结尾号召 */
.page-about .section-cta {
  padding: var(--space-lg) 0 var(--space-xl);
  text-align: center;
}
.page-about .section-cta__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}
.page-about .section-cta__text {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-dark-blue);
  margin: 0;
  max-width: 500px;
}

/* 响应式：窄屏 ~ 平板 */
@media (max-width: 768px) {
  .page-about .hero-intro__sidebar {
    flex: 1 1 100%;
    max-width: 100%;
    border-right: none;
    padding-right: 0;
    border-bottom: 2px solid var(--color-gold);
    padding-bottom: var(--space-sm);
    margin-bottom: var(--space-sm);
  }
  .page-about .hero-intro__heading {
    font-size: 2rem;
  }
  .page-about .timeline {
    padding-left: var(--space-md);
  }
  .page-about .timeline__content {
    padding: var(--space-sm) var(--space-md);
  }
  .page-about .section-data__inner,
  .page-about .section-fan__inner {
    flex-direction: column;
  }
  .page-about .section-fan__sidebar {
    flex: 1 1 100%;
    max-width: 100%;
  }
  .page-about .section-fan__icon {
    max-width: 100%;
  }
  .page-about .section-fan__main {
    grid-template-columns: 1fr;
  }
  .page-about .fan-card {
    padding: var(--space-md);
  }
}