/* ===== BSPORTS 品牌档案 - 页面专属样式 ===== */
.page-about {
  --about-red: #E53935;
  --about-blue: #1E88E5;
  --about-silver: #B0BEC5;
  --about-border: #37474F;
  --about-bg-card: #1A1A1A;
  --about-bg-accent: #262626;
  --about-gap: 24px;
  font-family: var(--font-body, Roboto, "Noto Sans SC", sans-serif);
  color: var(--text-primary, #FFFFFF);
  background-color: var(--bg-primary, #0D0D0D);
  position: relative;
  overflow-x: hidden;
}

/* ===== 面包屑 ===== */
.page-about .breadcrumb {
  max-width: var(--container-max, 1280px);
  margin: 0 auto;
  padding: 16px var(--space-unit, 8px) 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-secondary, #B0BEC5);
}
.page-about .breadcrumb-link {
  color: var(--text-secondary, #B0BEC5);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s ease);
  font-family: var(--font-body, Roboto, "Noto Sans SC", sans-serif);
}
.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--about-red);
}
.page-about .breadcrumb-sep {
  color: var(--border-subtle, #37474F);
  font-family: var(--font-mono, "Fira Code", monospace);
}
.page-about .breadcrumb-current {
  color: var(--text-primary, #FFFFFF);
  font-family: var(--font-mono, "Fira Code", monospace);
  letter-spacing: 0.04em;
}

/* ===== 通用章节 ===== */
.page-about .section {
  padding: 48px 0;
}
.page-about .container {
  max-width: var(--container-max, 1280px);
  margin: 0 auto;
  padding: 0 16px;
}
.page-about .section-label {
  font-family: var(--font-mono, "Fira Code", monospace);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--about-red);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.page-about .section-heading {
  font-family: var(--font-heading, Oswald, Impact, sans-serif);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.15;
  color: var(--text-primary, #FFFFFF);
  margin: 0 0 8px 0;
}
.page-about .section-sub {
  font-size: 1rem;
  color: var(--text-secondary, #B0BEC5);
  margin: 0 0 32px 0;
  max-width: 640px;
}

/* ===== 首屏 hero ===== */
.page-about .hero-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: flex-start;
}
.page-about .hero-title {
  font-family: var(--font-heading, Oswald, Impact, sans-serif);
  font-weight: 700;
  font-size: 2.5rem;
  line-height: 1.1;
  margin: 0 0 8px 0;
  color: var(--text-primary, #FFFFFF);
}
.page-about .hero-sub {
  font-family: var(--font-mono, "Fira Code", monospace);
  font-size: 0.875rem;
  color: var(--about-red);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 16px 0;
}
.page-about .hero-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-secondary, #B0BEC5);
  margin: 0 0 28px 0;
  max-width: 540px;
}
.page-about .hero-stats-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}
.page-about .hero-stat {
  background: var(--about-bg-card);
  border: 1px solid var(--about-border);
  padding: 16px 20px;
  min-width: 120px;
  flex: 1 1 0;
  position: relative;
  cursor: default;
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
}
.page-about .hero-stat:hover,
.page-about .hero-stat:focus-within {
  border-color: var(--about-red);
  box-shadow: 0 0 0 1px var(--about-red);
}
.page-about .stat-digit {
  display: block;
  font-family: var(--font-heading, Oswald, Impact, sans-serif);
  font-weight: 700;
  font-size: 2.8rem;
  line-height: 1;
  color: var(--about-red);
  margin-bottom: 4px;
}
.page-about .stat-plus,
.page-about .stat-unit {
  font-size: 1.6rem;
  color: var(--about-blue);
}
.page-about .stat-meta {
  display: block;
  font-family: var(--font-mono, "Fira Code", monospace);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--text-secondary, #B0BEC5);
  text-transform: uppercase;
}
.page-about .stat-hint {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--about-bg-accent);
  border: 1px solid var(--about-border);
  padding: 8px 12px;
  font-size: 0.75rem;
  color: var(--text-primary, #FFFFFF);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast, 0.2s ease);
  z-index: 10;
  font-family: var(--font-body, Roboto, "Noto Sans SC", sans-serif);
}
.page-about .hero-stat:hover .stat-hint,
.page-about .hero-stat:focus-within .stat-hint {
  opacity: 1;
}
.page-about .hero-preview {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  border-top: 1px solid var(--about-border);
  padding-top: 20px;
  width: 100%;
}
.page-about .preview-label {
  font-family: var(--font-mono, "Fira Code", monospace);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--text-secondary, #B0BEC5);
  text-transform: uppercase;
}
.page-about .preview-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.page-about .preview-link {
  font-family: var(--font-heading, Oswald, Impact, sans-serif);
  font-weight: 400;
  font-size: 0.9rem;
  color: var(--text-secondary, #B0BEC5);
  text-decoration: none;
  padding: 4px 10px;
  border: 1px solid transparent;
  transition: color var(--transition-fast, 0.2s ease), border-color var(--transition-fast, 0.2s ease);
}
.page-about .preview-link:hover,
.page-about .preview-link:focus-visible {
  color: var(--about-red);
  border-color: var(--about-red);
}
.page-about .preview-dot {
  color: var(--border-subtle, #37474F);
  font-size: 0.6rem;
}
.page-about .hero-visual {
  width: 100%;
}
.page-about .hero-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-border);
  background: var(--about-bg-card);
  aspect-ratio: 600 / 450;
}

/* ===== 核心能力 ===== */
.page-about .capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}
.page-about .capability-card {
  background: var(--about-bg-card);
  border: 1px solid var(--about-border);
  padding: 28px 24px;
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
  position: relative;
}
.page-about .capability-card:hover,
.page-about .capability-card:focus-within {
  border-color: var(--about-red);
  box-shadow: 0 0 0 1px var(--about-red);
}
.page-about .card-icon {
  margin-bottom: 16px;
}
.page-about .card-icon-num {
  font-family: var(--font-mono, "Fira Code", monospace);
  font-size: 1.2rem;
  color: var(--about-blue);
  letter-spacing: 0.04em;
}
.page-about .card-title {
  font-family: var(--font-heading, Oswald, Impact, sans-serif);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--text-primary, #FFFFFF);
  margin: 0 0 10px 0;
}
.page-about .card-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-secondary, #B0BEC5);
  margin: 0 0 18px 0;
}
.page-about .card-link {
  display: inline-block;
  font-family: var(--font-mono, "Fira Code", monospace);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--about-red);
  text-decoration: none;
  text-transform: uppercase;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast, 0.2s ease), color var(--transition-fast, 0.2s ease);
}
.page-about .card-link:hover,
.page-about .card-link:focus-visible {
  border-bottom-color: var(--about-red);
  color: var(--about-blue);
}

/* ===== 服务理念 ===== */
.page-about .philosophy-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.page-about .philosophy-content {
  flex: 1 1 0;
}
.page-about .philosophy-text {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-secondary, #B0BEC5);
  margin: 16px 0 28px 0;
  max-width: 600px;
}
.page-about .philosophy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-family: var(--font-heading, Oswald, Impact, sans-serif);
  font-weight: 400;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
  border: 1px solid var(--about-red);
  cursor: pointer;
  transition: background var(--transition-fast, 0.2s ease), color var(--transition-fast, 0.2s ease), border-color var(--transition-fast, 0.2s ease);
}
.page-about .btn-primary {
  background: var(--about-red);
  color: #0D0D0D;
  border-color: var(--about-red);
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: transparent;
  color: var(--about-red);
}
.page-about .btn-outline {
  background: transparent;
  color: var(--about-red);
}
.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: var(--about-red);
  color: #0D0D0D;
}
.page-about .philosophy-visual {
  width: 100%;
  flex: 1 1 0;
}
.page-about .philosophy-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--about-border);
  background: var(--about-bg-card);
  aspect-ratio: 800 / 500;
}

/* ===== 覆盖范围 ===== */
.page-about .coverage-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--about-gap);
  margin-bottom: 32px;
}
.page-about .league-card {
  background: var(--about-bg-card);
  border: 1px solid var(--about-border);
  padding: 20px 16px;
  text-align: center;
  cursor: default;
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
}
.page-about .league-card:hover,
.page-about .league-card:focus-within {
  border-color: var(--about-blue);
  box-shadow: 0 0 0 1px var(--about-blue);
}
.page-about .league-code {
  display: block;
  font-family: var(--font-mono, "Fira Code", monospace);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--about-blue);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.page-about .league-name {
  display: block;
  font-family: var(--font-heading, Oswald, Impact, sans-serif);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-primary, #FFFFFF);
  margin-bottom: 4px;
}
.page-about .league-desc {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary, #B0BEC5);
}
.page-about .coverage-footer {
  border-top: 1px solid var(--about-border);
  padding-top: 24px;
}
.page-about .trust-statement {
  font-size: 0.8rem;
  color: var(--text-secondary, #B0BEC5);
  line-height: 1.6;
  margin: 0;
  max-width: 720px;
  font-style: normal;
}

/* ===== 装饰纹理 ===== */
.page-about .about-texture {
  position: absolute;
  bottom: 60px;
  right: 20px;
  width: 160px;
  height: 160px;
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.page-about .texture-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== 桌面端布局（≥768px） ===== */
@media (min-width: 768px) {
  .page-about .section {
    padding: 72px 0;
  }
  .page-about .container {
    padding: 0 24px;
  }
  .page-about .section-heading {
    font-size: 2.8rem;
  }
  .page-about .section-sub {
    font-size: 1.05rem;
    margin-bottom: 40px;
  }

  /* 首屏：左右并排 */
  .page-about .hero-layout {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }
  .page-about .hero-text {
    flex: 1 1 50%;
  }
  .page-about .hero-visual {
    flex: 1 1 50%;
  }
  .page-about .hero-title {
    font-size: 3.5rem;
  }
  .page-about .stat-digit {
    font-size: 3.2rem;
  }
  .page-about .hero-stats-group {
    flex-wrap: nowrap;
    gap: 12px;
  }
  .page-about .hero-stat {
    min-width: 0;
  }
  .page-about .hero-preview {
    width: auto;
  }

  /* 核心能力：三列网格 */
  .page-about .capability-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .page-about .capability-card {
    padding: 32px 24px;
  }

  /* 服务理念：左右并排 */
  .page-about .philosophy-layout {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }
  .page-about .philosophy-content {
    flex: 1 1 45%;
  }
  .page-about .philosophy-visual {
    flex: 1 1 55%;
  }

  /* 覆盖范围：五列网格 */
  .page-about .coverage-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
  }
  .page-about .league-card {
    padding: 28px 12px;
  }
  .page-about .league-name {
    font-size: 1.6rem;
  }

  /* 装饰纹理放大 */
  .page-about .about-texture {
    width: 260px;
    height: 260px;
    bottom: 80px;
    right: 40px;
  }
}

/* ===== 大桌面端微调（≥1024px） ===== */
@media (min-width: 1024px) {
  .page-about .hero-title {
    font-size: 4rem;
  }
  .page-about .stat-digit {
    font-size: 3.6rem;
  }
  .page-about .section-heading {
    font-size: 3.2rem;
  }
  .page-about .capability-grid {
    gap: 24px;
  }
  .page-about .coverage-grid {
    gap: 20px;
  }
  .page-about .philosophy-layout {
    gap: 64px;
  }
}

/* ===== 确保数字和等宽元素不受全局影响 ===== */
.page-about .mono {
  font-family: var(--font-mono, "Fira Code", monospace);
}
.page-about .text-secondary {
  color: var(--text-secondary, #B0BEC5);
}