/* ===== 品牌概况页专属样式 ===== */
.page-about {
  --about-aside-width: 140px;
  --about-gap: var(--spacing-xl);
  --about-accent-line: var(--color-accent);
  --about-timeline-dot: var(--color-primary);
  --about-timeline-line: var(--color-border);
  --about-card-bg: var(--color-bg-light);
  --about-card-radius: var(--radius-md);
  --about-tag-radius: var(--radius-pill);

  background-color: var(--color-bg-light);
  color: var(--color-text-primary);
  padding-bottom: var(--spacing-3xl);
}

/* ---- 面包屑 ---- */
.page-about .breadcrumb {
  padding-top: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  align-items: center;
}

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

.page-about .breadcrumb a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.page-about .breadcrumb span[aria-current="page"] {
  font-weight: 600;
  color: var(--color-text-primary);
}

/* ---- 英雄区（杂志左窄右宽） ---- */
.page-about .about-hero {
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
  position: relative;
}

.page-about .about-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.page-about .about-hero__grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.page-about .about-hero__aside {
  flex: 0 0 auto;
}

.page-about .about-hero__tagline {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--font-size-h4);
  color: var(--color-primary);
  letter-spacing: 0.12em;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  padding: var(--spacing-sm) var(--spacing-xs);
  border-left: 3px solid var(--color-accent);
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

.page-about .about-hero__content {
  flex: 1;
}

.page-about .about-hero__content h1 {
  font-family: var(--font-heading);
  font-size: var(--font-size-h1);
  line-height: 1.05;
  color: var(--color-secondary);
  margin: 0 0 var(--spacing-md);
  letter-spacing: -0.02em;
  position: relative;
  display: inline-block;
}

.page-about .about-hero__content h1::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-accent);
  margin-top: var(--spacing-sm);
  border-radius: var(--radius-pill);
}

.page-about .about-hero__lead {
  font-size: var(--font-size-h4);
  line-height: 1.5;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 680px;
}

.page-about .about-hero__fig {
  margin: var(--spacing-xl) 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
  position: relative;
}

.page-about .about-hero__fig::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, transparent 60%);
  opacity: 0.08;
  pointer-events: none;
  z-index: 1;
}

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

/* ---- 杂志双栏 sections ---- */
.page-about .about-section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--color-border);
}

.page-about .about-section__grid {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.page-about .about-section__aside {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  flex: 0 0 auto;
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-accent);
}

.page-about .about-section__num {
  font-family: var(--font-heading);
  font-size: var(--font-size-h2);
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.35;
  letter-spacing: -0.03em;
}

.page-about .about-section__label {
  font-family: var(--font-heading);
  font-size: var(--font-size-h4);
  color: var(--color-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .about-section__content {
  flex: 1;
  min-width: 0;
}

.page-about .about-section__content h2 {
  font-family: var(--font-heading);
  font-size: var(--font-size-h2);
  line-height: 1.1;
  color: var(--color-secondary);
  margin: 0 0 var(--spacing-md);
  letter-spacing: -0.01em;
}

.page-about .about-section__content p {
  font-size: var(--font-size-body);
  line-height: 1.7;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  max-width: 680px;
}

/* ---- 品牌使命 ---- */
.page-about .about-mission .about-section__content p:first-of-type {
  font-size: var(--font-size-h4);
  line-height: 1.5;
  color: var(--color-text-primary);
  font-weight: 500;
}

/* ---- 服务区 ---- */
.page-about .about-services__icon-fig {
  margin: var(--spacing-md) 0 var(--spacing-lg);
  display: inline-block;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  padding: var(--spacing-xs);
}

.page-about .about-services__icon {
  width: 100px;
  height: 100px;
  object-fit: contain;
  display: block;
}

.page-about .service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.page-about .service-card {
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.page-about .service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-primary);
  opacity: 0.6;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .service-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 12px 28px rgba(0,0,0,0.08);
  border-color: var(--color-primary);
}

.page-about .service-card__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-h4);
  font-weight: 700;
  color: var(--color-secondary);
  margin: 0 0 var(--spacing-xs);
  line-height: 1.2;
}

.page-about .service-card__desc {
  font-size: var(--font-size-small);
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0;
}

.page-about .about-services__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

/* ---- 时间轴 ---- */
.page-about .about-timeline {
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg-dark);
  color: var(--color-text-light);
  margin: var(--spacing-xl) 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-primary));
}

.page-about .about-timeline__intro {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.page-about .about-timeline__num {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--font-size-h3);
  color: var(--color-accent);
  letter-spacing: 0.2em;
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
}

.page-about .about-timeline__intro h2 {
  font-family: var(--font-heading);
  font-size: var(--font-size-h2);
  line-height: 1.1;
  margin: 0 0 var(--spacing-sm);
  color: var(--color-text-light);
}

.page-about .about-timeline__intro p {
  font-size: var(--font-size-body);
  color: rgba(255,255,255,0.7);
  max-width: 500px;
  margin: 0 auto;
}

.page-about .timeline-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  position: relative;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.page-about .timeline-list::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 28px;
  width: 2px;
  background: var(--color-secondary-light);
  opacity: 0.4;
}

.page-about .timeline-item {
  display: flex;
  gap: var(--spacing-lg);
  position: relative;
  padding-left: 0;
}

.page-about .timeline-item__marker {
  flex: 0 0 56px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 1;
}

.page-about .timeline-item__version {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-light);
  font-family: var(--font-mono);
  font-size: var(--font-size-tiny);
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  box-shadow: 0 0 0 4px var(--color-bg-dark), 0 0 0 6px var(--color-primary);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.page-about .timeline-item:hover .timeline-item__version {
  transform: scale(1.1);
  box-shadow: 0 0 0 4px var(--color-bg-dark), 0 0 0 6px var(--color-accent), 0 0 20px rgba(255,209,102,0.3);
}

.page-about .timeline-item__body {
  flex: 1;
  padding-top: var(--spacing-xs);
  padding-bottom: var(--spacing-md);
}

.page-about .timeline-item__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-h4);
  font-weight: 700;
  color: var(--color-text-light);
  margin: 0 0 var(--spacing-xs);
  line-height: 1.3;
}

.page-about .timeline-item__desc {
  font-size: var(--font-size-small);
  line-height: 1.6;
  color: rgba(255,255,255,0.75);
  margin: 0;
}

/* ---- 赛事覆盖 ---- */
.page-about .about-coverage__fig {
  margin: var(--spacing-md) 0 var(--spacing-lg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 28px rgba(0,0,0,0.06);
}

.page-about .about-coverage__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow);
}

.page-about .about-coverage__fig:hover .about-coverage__img {
  transform: scale(1.02);
}

.page-about .about-coverage__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin: var(--spacing-lg) 0;
}

.page-about .tag {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-small);
  font-weight: 600;
  line-height: 1.4;
  transition: all var(--transition-fast);
}

.page-about .tag--primary {
  background: var(--color-primary);
  color: var(--color-text-light);
}

.page-about .tag--outline {
  background: transparent;
  color: var(--color-secondary);
  border: 1.5px solid var(--color-secondary);
}

.page-about .tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* ---- 为什么选择云体育 ---- */
.page-about .why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.page-about .why-card {
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), border-color var(--transition-base);
  position: relative;
}

.page-about .why-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.page-about .why-card__icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: var(--spacing-sm);
  display: block;
}

.page-about .why-card__title {
  font-family: var(--font-heading);
  font-size: var(--font-size-h4);
  font-weight: 700;
  color: var(--color-secondary);
  margin: 0 0 var(--spacing-xs);
  line-height: 1.2;
}

.page-about .why-card__desc {
  font-size: var(--font-size-small);
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0;
}

.page-about .about-why__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

/* ---- 共享按钮重定义 ---- */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-xl);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: var(--font-size-small);
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 2px solid transparent;
}

.page-about .btn-primary {
  background: var(--color-primary);
  color: var(--color-text-light);
  border-color: var(--color-primary);
}

.page-about .btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(230,57,70,0.25);
}

.page-about .btn-accent {
  background: var(--color-accent);
  color: var(--color-secondary);
  border-color: var(--color-accent);
}

.page-about .btn-accent:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,209,102,0.35);
}

.page-about .btn-outline {
  background: transparent;
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.page-about .btn-outline:hover {
  background: var(--color-secondary);
  color: var(--color-text-light);
  transform: translateY(-2px);
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .page-about {
    padding-bottom: var(--spacing-3xl);
  }

  .page-about .about-hero__grid {
    flex-direction: row;
    gap: var(--spacing-2xl);
    align-items: flex-start;
  }

  .page-about .about-hero__aside {
    flex: 0 0 var(--about-aside-width);
    padding-top: var(--spacing-sm);
  }

  .page-about .about-hero__tagline {
    writing-mode: vertical-rl;
    font-size: var(--font-size-h3);
    margin-bottom: 0;
    padding: var(--spacing-md) var(--spacing-xs);
  }

  .page-about .about-hero__content {
    flex: 1;
    max-width: 780px;
  }

  .page-about .about-hero__content h1 {
    font-size: calc(var(--font-size-h1) * 1.1);
  }

  .page-about .about-section__grid {
    flex-direction: row;
    gap: var(--spacing-2xl);
    align-items: flex-start;
  }

  .page-about .about-section__aside {
    flex: 0 0 var(--about-aside-width);
    flex-direction: column;
    align-items: flex-start;
    border-bottom: none;
    padding-bottom: 0;
    padding-top: var(--spacing-sm);
    border-left: 3px solid var(--color-accent);
    padding-left: var(--spacing-md);
  }

  .page-about .about-section__num {
    font-size: var(--font-size-h1);
    opacity: 0.3;
  }

  .page-about .about-section__label {
    font-size: var(--font-size-h3);
  }

  .page-about .about-section__content {
    flex: 1;
    max-width: 780px;
  }

  .page-about .service-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .why-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .page-about .about-timeline__intro h2 {
    font-size: calc(var(--font-size-h2) * 1.1);
  }

  .page-about .timeline-list {
    gap: var(--spacing-xl);
  }

  .page-about .timeline-item__version {
    width: 64px;
    height: 64px;
    font-size: var(--font-size-small);
  }

  .page-about .timeline-item__marker {
    flex: 0 0 64px;
  }

  .page-about .timeline-list::before {
    left: 31px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__content h1 {
    font-size: 4.2rem;
  }

  .page-about .about-hero__tagline {
    font-size: var(--font-size-h2);
  }

  .page-about .about-section__aside {
    flex-basis: 180px;
  }

  .page-about .service-grid {
    gap: var(--spacing-lg);
  }

  .page-about .why-grid {
    gap: var(--spacing-lg);
  }
}

/* ===== 动效：时间轴项渐入 ===== */
@media (prefers-reduced-motion: no-preference) {
  .page-about .timeline-item {
    opacity: 0;
    transform: translateY(20px);
    animation: aboutFadeUp 0.6s ease forwards;
  }

  .page-about .timeline-item:nth-child(1) { animation-delay: 0.1s; }
  .page-about .timeline-item:nth-child(2) { animation-delay: 0.25s; }
  .page-about .timeline-item:nth-child(3) { animation-delay: 0.4s; }
  .page-about .timeline-item:nth-child(4) { animation-delay: 0.55s; }

  @keyframes aboutFadeUp {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

/* ===== 图片响应式 ===== */
.page-about img {
  max-width: 100%;
  height: auto;
}

/* ===== 链接样式增强 ===== */
.page-about a:not(.btn):not(.breadcrumb a) {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.page-about a:not(.btn):not(.breadcrumb a):hover {
  color: var(--color-primary-hover);
}

/* ===== 高亮强调 ===== */
.page-about strong {
  color: var(--color-secondary);
  font-weight: 700;
}
</style>