/* ===== 页面专属样式：page-about（品牌概况） ===== */
.page-about {
  --brand-accent-line: var(--main-green);
  --stat-number-color: var(--main-green);
  --dot-size: 12px;
  --cloud-max: 640px;
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.page-about .breadcrumb a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-about .breadcrumb a:hover {
  color: var(--main-green);
}
.page-about .breadcrumb__sep {
  color: var(--border-subtle);
}
.page-about .breadcrumb__current {
  color: var(--text-primary);
  font-weight: 500;
}

/* === 首屏预览区 === */
.page-about .hero-preview {
  padding: 2rem 0 3rem;
}
.page-about .hero-preview__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.page-about .hero-preview__visual {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: rotate(-0.5deg) scale(1.02);
  transition: transform var(--transition-med);
}
.page-about .hero-preview__visual:hover {
  transform: rotate(0deg) scale(1.04);
}
.page-about .hero-preview__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 380px;
  object-fit: cover;
}
.page-about .hero-preview__content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-about .hero-preview .overline {
  color: var(--main-green);
  letter-spacing: 1.5px;
}
.page-about .hero-preview__summary {
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 36em;
}
.page-about .preview-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}
.page-about .preview-card {
  flex: 1 1 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 1.25rem 1rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}
.page-about .preview-card:hover {
  border-color: var(--main-green);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.page-about .preview-card__icon {
  color: var(--main-green);
  width: 36px;
  height: 36px;
  transition: color var(--transition-fast);
}
.page-about .preview-card:hover .preview-card__icon {
  color: var(--accent-orange);
}
.page-about .preview-card__title {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.3px;
}
.page-about .preview-card__desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* === 倾斜分割线 === */
.page-about .section__divider--angled {
  height: 3px;
  background: linear-gradient(135deg, var(--main-green) 0%, var(--accent-orange) 60%, var(--accent-blue) 100%);
  transform: skewY(-1deg);
  margin: 0;
  border: none;
  max-width: var(--max-width);
  width: 100%;
}

/* === 品牌简介章节 === */
.page-about .section-brand {
  padding: 4rem 0;
}
.page-about .section-brand__grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}
.page-about .section-brand__text {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-about .section-brand__text .overline {
  color: var(--main-green);
  letter-spacing: 1.5px;
}
.page-about .section-brand__text p {
  max-width: 36em;
}
.page-about .section-brand__btn {
  align-self: flex-start;
  margin-top: 0.5rem;
}
.page-about .section-brand__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.page-about .brand-stat {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 1.5rem 1rem;
  text-align: center;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-med);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.6s ease forwards;
}
.page-about .brand-stat:nth-child(1) { animation-delay: 0.1s; }
.page-about .brand-stat:nth-child(2) { animation-delay: 0.2s; }
.page-about .brand-stat:nth-child(3) { animation-delay: 0.3s; }
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
.page-about .brand-stat:hover {
  border-color: var(--main-green);
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.page-about .brand-stat__number {
  display: block;
  font-family: var(--font-data);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--stat-number-color);
  line-height: 1;
  margin-bottom: 0.3rem;
}
.page-about .brand-stat__label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

/* === 核心数据章节 === */
.page-about .section-data {
  padding: 4rem 0;
}
.page-about .section-data .overline {
  color: var(--accent-orange);
}
.page-about .heading--center {
  text-align: center;
}
.page-about .data-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2rem auto;
  max-width: 800px;
}
.page-about .data-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.75rem;
  padding: 2rem 1.5rem;
  transition: all var(--transition-med);
  position: relative;
  overflow: hidden;
}
.page-about .data-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--main-green), var(--accent-orange));
  opacity: 0;
  transition: opacity var(--transition-med);
}
.page-about .data-card:hover::before {
  opacity: 1;
}
.page-about .data-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.page-about .data-card__icon {
  flex-shrink: 0;
}
.page-about .data-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}
.page-about .data-card__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  max-width: 24em;
}
.page-about .data-card .tag {
  margin-top: 0.25rem;
}

/* 联赛云图 */
.page-about .league-cloud {
  margin: 3rem auto 0;
  max-width: var(--cloud-max);
  text-align: center;
}
.page-about .league-cloud__heading {
  margin-bottom: 1rem;
  color: var(--text-primary);
}
.page-about .league-cloud__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  padding: 1.5rem 1rem;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}
.page-about .league-dot {
  display: inline-block;
  width: var(--dot-size);
  height: var(--dot-size);
  border-radius: 50%;
  background: hsla(var(--dot-hue), 75%, 55%, 0.9);
  cursor: default;
  transition: all var(--transition-fast);
  position: relative;
  box-shadow: 0 0 0 0 hsla(var(--dot-hue), 75%, 55%, 0.3);
}
.page-about .league-dot:hover {
  transform: scale(2.2);
  box-shadow: 0 0 0 6px hsla(var(--dot-hue), 75%, 55%, 0.3);
  z-index: 10;
}
.page-about .league-dot::after {
  content: attr(data-league);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0);
  background: var(--bg-dark);
  color: var(--text-primary);
  font-size: 0.65rem;
  font-family: var(--font-data);
  padding: 2px 8px;
  border-radius: 4px;
  white-space: nowrap;
  border: 1px solid var(--border-subtle);
  opacity: 0;
  transition: all var(--transition-fast);
  pointer-events: none;
}
.page-about .league-dot:hover::after {
  transform: translateX(-50%) scale(1);
  opacity: 1;
}
.page-about .league-cloud__hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

/* 联赛地图 */
.page-about .section-data__map {
  margin-top: 2.5rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.page-about .section-data__map img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
}
.page-about .section-data__map-caption {
  text-align: center;
  margin-top: 0.5rem;
  color: var(--text-muted);
}

/* === 用户承诺章节 === */
.page-about .section-promise {
  padding: 4rem 0;
}
.page-about .promise-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.page-about .promise-content {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-about .promise-content .overline {
  color: var(--main-green);
  letter-spacing: 1.5px;
}
.page-about .promise-content p {
  max-width: 36em;
}
.page-about .promise-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-about .promise-list__item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.page-about .promise-list__icon {
  flex-shrink: 0;
  margin-top: 0.15rem;
}
.page-about .promise-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}
.page-about .promise-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.page-about .promise-image img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 320px;
  object-fit: cover;
}

/* === 响应式：平板 768px+ === */
@media (min-width: 768px) {
  .page-about .hero-preview__grid {
    flex-direction: row;
    align-items: center;
  }
  .page-about .hero-preview__visual {
    flex: 0 0 48%;
    max-width: 48%;
  }
  .page-about .hero-preview__visual img {
    max-height: 500px;
  }
  .page-about .hero-preview__content {
    flex: 1;
  }
  .page-about .section-brand__grid {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about .section-brand__text {
    flex: 1.2;
  }
  .page-about .section-brand__stats {
    flex: 0 0 280px;
    grid-template-columns: 1fr 1fr;
  }
  .page-about .data-cards {
    grid-template-columns: repeat(3, 1fr);
    max-width: none;
  }
  .page-about .promise-grid {
    flex-direction: row;
    align-items: center;
  }
  .page-about .promise-content {
    flex: 1.2;
  }
  .page-about .promise-image {
    flex: 0 0 45%;
  }
  .page-about .promise-image img {
    max-height: 400px;
  }
  .page-about .breadcrumb {
    padding-left: 2.5rem;
    padding-right: 2.5rem;
  }
}

/* === 响应式：桌面 1024px+ === */
@media (min-width: 1024px) {
  .page-about .hero-preview {
    padding: 3rem 0 4rem;
  }
  .page-about .hero-preview__visual img {
    max-height: 540px;
  }
  .page-about .section-brand__stats {
    flex-basis: 320px;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }
  .page-about .brand-stat__number {
    font-size: 3rem;
  }
  .page-about .data-card {
    padding: 2.5rem 2rem;
  }
  .page-about .league-cloud__grid {
    gap: 8px;
    padding: 2rem 1.5rem;
  }
  .page-about .league-dot {
    width: 14px;
    height: 14px;
  }
  .page-about .brand-stat {
    padding: 2rem 1.5rem;
  }
}

/* === 数据动画：进入视口时增长（配合 JS） === */
.page-about [data-animate="stats"] .brand-stat {
  opacity: 0;
  transform: translateY(20px);
}
.page-about [data-animate="stats"].in-view .brand-stat {
  animation: fadeUp 0.6s ease forwards;
}
.page-about [data-animate="stats"].in-view .brand-stat:nth-child(1) { animation-delay: 0.1s; }
.page-about [data-animate="stats"].in-view .brand-stat:nth-child(2) { animation-delay: 0.2s; }
.page-about [data-animate="stats"].in-view .brand-stat:nth-child(3) { animation-delay: 0.3s; }

/* 小而美：防止溢出 */
@media (max-width: 480px) {
  .page-about .hero-preview__visual {
    transform: none;
  }
  .page-about .preview-card {
    flex: 1 1 100%;
    flex-direction: row;
    justify-content: flex-start;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
  }
  .page-about .preview-card__icon {
    width: 28px;
    height: 28px;
  }
  .page-about .brand-stat__number {
    font-size: 2rem;
  }
  .page-about .data-card {
    padding: 1.5rem 1rem;
  }
}

.page-about {
  --dot-hue: none;
}