/* ===== 品牌概况页专属样式 .page-about ===== */
.page-about {
  --about-cream: #F4F7FC;
  --about-dark-brown: #1A1A2E;
  --about-accent: #FF6B35;
  --about-primary: #0B1D3A;
  --about-card-bg: rgba(255, 255, 255, 0.92);
  --about-radius-card: 20px;
  --about-radius-sm: 12px;
  --about-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --about-shadow-hover: 0 8px 40px rgba(0, 0, 0, 0.14);
  --about-transition: 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  background: var(--about-cream);
  color: var(--about-dark-brown);
  font-family: var(--font-body, "Inter", "Noto Sans SC", system-ui, sans-serif);
  line-height: 1.6;
  padding: 2rem 0 4rem;
}

/* 容器 */
.page-about .container {
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* 面包屑 */
.page-about .breadcrumb {
  font-size: 0.875rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  color: rgba(26, 26, 46, 0.55);
}
.page-about .breadcrumb a {
  color: var(--about-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--about-transition);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--about-accent);
  outline: 2px solid var(--about-accent);
  outline-offset: 2px;
  border-radius: 2px;
}
.page-about .breadcrumb .separator {
  color: rgba(26, 26, 46, 0.30);
  user-select: none;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--about-dark-brown);
  font-weight: 600;
}

/* 左右分屏栅格 */
.page-about .about-split {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* ===== 左侧叙事区 ===== */
.page-about .about-narrative {
  flex: 0 0 100%;
}

/* 品牌理念区块 */
.page-about .about-intro {
  position: relative;
  background: linear-gradient(135deg, #ffffff 0%, rgba(11, 29, 58, 0.03) 100%);
  border-radius: var(--about-radius-card);
  padding: 2rem 1.5rem;
  overflow: hidden;
  box-shadow: var(--about-shadow);
  border: 1px solid rgba(11, 29, 58, 0.06);
}
.page-about .intro-text-wrap {
  position: relative;
  z-index: 2;
  max-width: 720px;
}
.page-about .about-intro h1 {
  font-family: var(--font-heading, "Montserrat", "Noto Sans SC", system-ui, sans-serif);
  font-style: italic;
  font-weight: 700;
  font-size: 2.2rem;
  line-height: 1.2;
  margin: 0 0 0.25rem;
  color: var(--about-primary);
  letter-spacing: -0.01em;
}
.page-about .about-intro .page-subtitle {
  font-family: var(--font-heading, "Montserrat", "Noto Sans SC", system-ui, sans-serif);
  font-style: italic;
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--about-accent);
  margin: 0 0 1.25rem;
}
.page-about .intro-paragraph {
  font-size: 1rem;
  line-height: 1.7;
  margin: 0 0 1rem;
  color: rgba(26, 26, 46, 0.80);
  max-width: 660px;
}
.page-about .intro-link {
  color: var(--about-accent);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
  transition: color var(--about-transition);
}
.page-about .intro-link:hover,
.page-about .intro-link:focus-visible {
  color: var(--about-primary);
  outline: 2px solid var(--about-accent);
  outline-offset: 2px;
  border-radius: 2px;
}
.page-about .intro-visual {
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.12;
  overflow: hidden;
}
.page-about .intro-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

/* 我们的服务 */
.page-about .about-services {
  padding: 2.5rem 0 0;
}
.page-about .about-services h2,
.page-about .about-features h2 {
  font-family: var(--font-heading, "Montserrat", "Noto Sans SC", system-ui, sans-serif);
  font-style: italic;
  font-weight: 700;
  font-size: 1.75rem;
  margin: 0 0 0.25rem;
  color: var(--about-primary);
}
.page-about .section-desc {
  font-size: 0.95rem;
  color: rgba(26, 26, 46, 0.55);
  margin: 0 0 1.75rem;
}
.page-about .services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}
.page-about .service-card {
  background: var(--about-card-bg);
  border-radius: var(--about-radius-card);
  padding: 1.5rem 1.25rem;
  border: 1px solid rgba(11, 29, 58, 0.06);
  box-shadow: var(--about-shadow);
  transition: transform var(--about-transition), box-shadow var(--about-transition);
  cursor: default;
  position: relative;
}
.page-about .service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--about-shadow-hover);
}
.page-about .service-icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 0.75rem;
}
.page-about .service-title {
  font-family: var(--font-heading, "Montserrat", "Noto Sans SC", system-ui, sans-serif);
  font-weight: 600;
  font-size: 1.2rem;
  margin: 0 0 0.35rem;
  color: var(--about-primary);
}
.page-about .short-desc {
  font-size: 0.95rem;
  color: rgba(26, 26, 46, 0.65);
  margin: 0 0 0.5rem;
}
.page-about .detailed-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(26, 26, 46, 0.75);
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.40s ease, opacity 0.40s ease, margin 0.30s ease;
}
.page-about .service-card:hover .detailed-desc {
  max-height: 120px;
  opacity: 1;
  margin-top: 0.5rem;
}
.page-about .services-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.page-about .btn {
  display: inline-block;
  padding: 0.6rem 1.6rem;
  border-radius: var(--radius-md, 12px);
  font-family: var(--font-nav, "Inter", "Noto Sans SC", system-ui, sans-serif);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  transition: background var(--about-transition), color var(--about-transition), box-shadow var(--about-transition);
  cursor: pointer;
  border: 2px solid transparent;
}
.page-about .btn-accent {
  background: var(--about-accent);
  color: #fff;
  border-color: var(--about-accent);
}
.page-about .btn-accent:hover,
.page-about .btn-accent:focus-visible {
  background: #e85a2a;
  border-color: #e85a2a;
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.30);
  outline: none;
}
.page-about .btn-outline {
  background: transparent;
  color: var(--about-primary);
  border-color: var(--about-primary);
}
.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: var(--about-primary);
  color: #fff;
  border-color: var(--about-primary);
  outline: none;
}

/* 便捷功能 */
.page-about .about-features {
  padding: 2.5rem 0 0;
}
.page-about .features-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: flex-start;
}
.page-about .features-list {
  flex: 1;
  width: 100%;
}
.page-about .feature-item {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(11, 29, 58, 0.06);
  align-items: flex-start;
}
.page-about .feature-item:last-child {
  border-bottom: none;
}
.page-about .feature-num {
  font-family: var(--font-data, "JetBrains Mono", "Courier New", monospace);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--about-accent);
  line-height: 1;
  flex-shrink: 0;
  width: 2.2rem;
}
.page-about .feature-text strong {
  display: block;
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: 0.15rem;
  color: var(--about-primary);
}
.page-about .feature-text p {
  font-size: 0.92rem;
  color: rgba(26, 26, 46, 0.65);
  margin: 0;
}
.page-about .features-more {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}
.page-about .features-visual {
  flex-shrink: 0;
  width: 100%;
  max-width: 240px;
  margin-top: 0.5rem;
}
.page-about .feature-phone-img {
  width: 100%;
  height: auto;
  border-radius: var(--about-radius-sm);
  box-shadow: var(--about-shadow);
  display: block;
}

/* ===== 右侧数据区 ===== */
.page-about .about-data {
  flex: 0 0 100%;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* 数据卡片（圆环图） */
.page-about .data-card {
  background: var(--about-primary);
  border-radius: var(--about-radius-card);
  padding: 1.75rem 1.5rem;
  text-align: center;
  box-shadow: var(--about-shadow);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.page-about .data-circle-wrap {
  position: relative;
  width: 160px;
  height: 160px;
  margin: 0 auto 0.75rem;
}
.page-about .data-circle-svg {
  display: block;
  width: 100%;
  height: 100%;
}
.page-about .circle-bg {
  opacity: 0.35;
}
.page-about .circle-fg {
  filter: drop-shadow(0 0 8px rgba(255, 107, 53, 0.40));
}
.page-about .data-circle-number {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-data, "JetBrains Mono", "Courier New", monospace);
  font-weight: 700;
  font-size: 3rem;
  color: #fff;
  line-height: 1;
  letter-spacing: 0.02em;
}
.page-about .data-circle-number small {
  font-size: 1.2rem;
  color: var(--about-accent);
}
.page-about .data-circle-label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.60);
  margin: 0 0 0.75rem;
}
.page-about .league-details {
  text-align: left;
  color: rgba(255, 255, 255, 0.80);
  font-size: 0.88rem;
}
.page-about .league-summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--about-accent);
  padding: 0.25rem 0;
  transition: color var(--about-transition);
  list-style: none;
}
.page-about .league-summary::-webkit-details-marker {
  display: none;
}
.page-about .league-summary::before {
  content: "▶ ";
  font-size: 0.7rem;
  display: inline-block;
  margin-right: 0.3rem;
  transition: transform 0.25s ease;
}
.page-about details[open] .league-summary::before {
  transform: rotate(90deg);
}
.page-about .league-summary:hover,
.page-about .league-summary:focus-visible {
  color: #ff9f6e;
  outline: 2px solid var(--about-accent);
  outline-offset: 2px;
  border-radius: 2px;
}
.page-about .league-list {
  margin: 0.75rem 0 0;
  padding-left: 1.2rem;
  list-style: none;
}
.page-about .league-list li {
  padding: 0.25rem 0;
  line-height: 1.5;
  position: relative;
}
.page-about .league-list li::before {
  content: "•";
  color: var(--about-accent);
  position: absolute;
  left: -1rem;
}

/* 关键数据指标 */
.page-about .data-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.75rem;
}
.page-about .stat-item {
  background: rgba(11, 29, 58, 0.04);
  border-radius: var(--about-radius-sm);
  padding: 1rem 0.75rem;
  text-align: center;
  border: 1px solid rgba(11, 29, 58, 0.06);
}
.page-about .stat-value {
  display: block;
  font-family: var(--font-data, "JetBrains Mono", "Courier New", monospace);
  font-weight: 700;
  font-size: 1.8rem;
  line-height: 1.1;
  color: var(--about-primary);
  margin-bottom: 0.2rem;
}
.page-about .stat-value small {
  font-size: 0.9rem;
  color: var(--about-accent);
}
.page-about .stat-label {
  font-size: 0.78rem;
  color: rgba(26, 26, 46, 0.50);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

/* 赛场氛围图 */
.page-about .atmosphere-wrap {
  border-radius: var(--about-radius-card);
  overflow: hidden;
  box-shadow: var(--about-shadow);
  line-height: 0;
}
.page-about .atmosphere-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* 数据信任声明 */
.page-about .data-trust {
  font-size: 0.78rem;
  text-align: center;
  color: rgba(26, 26, 46, 0.35);
  margin: 0;
}

/* ===== 桌面端（≥768px） ===== */
@media (min-width: 768px) {
  .page-about {
    padding: 3rem 0 5rem;
  }
  .page-about .container {
    padding: 0 2rem;
  }
  .page-about .breadcrumb {
    margin-bottom: 2.5rem;
  }
  .page-about .about-split {
    flex-direction: row;
    gap: 3rem;
    align-items: flex-start;
  }
  .page-about .about-narrative {
    flex: 0 0 60%;
    max-width: 780px;
  }
  .page-about .about-data {
    flex: 1 1 0;
    min-width: 280px;
    position: sticky;
    top: calc(var(--header-height, 72px) + 1.5rem);
  }
  .page-about .about-intro {
    padding: 2.5rem 2.5rem 2.5rem 2rem;
  }
  .page-about .about-intro h1 {
    font-size: 2.6rem;
  }
  .page-about .about-intro .page-subtitle {
    font-size: 1.25rem;
  }
  .page-about .intro-visual {
    width: 50%;
    opacity: 0.18;
  }
  .page-about .services-grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.5rem;
  }
  .page-about .service-card {
    padding: 1.75rem 1.5rem;
  }
  .page-about .features-layout {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about .features-list {
    width: auto;
  }
  .page-about .features-visual {
    width: 200px;
    margin-top: 0;
  }
  .page-about .data-circle-wrap {
    width: 180px;
    height: 180px;
  }
  .page-about .data-circle-number {
    font-size: 3.4rem;
  }
  .page-about .stat-value {
    font-size: 2rem;
  }
  .page-about .league-list li {
    font-size: 0.85rem;
  }
}

/* ===== 宽桌面（≥1024px） ===== */
@media (min-width: 1024px) {
  .page-about .about-narrative {
    flex: 0 0 62%;
  }
  .page-about .about-intro h1 {
    font-size: 3rem;
  }
  .page-about .about-intro .page-subtitle {
    font-size: 1.35rem;
  }
  .page-about .services-grid {
    gap: 1.75rem;
  }
  .page-about .data-stats {
    gap: 1rem;
  }
}

/* ===== 极窄屏保护（≤420px） ===== */
@media (max-width: 420px) {
  .page-about {
    padding: 1.25rem 0 3rem;
  }
  .page-about .container {
    padding: 0 0.75rem;
  }
  .page-about .about-intro {
    padding: 1.5rem 1rem;
  }
  .page-about .about-intro h1 {
    font-size: 1.7rem;
  }
  .page-about .about-intro .page-subtitle {
    font-size: 0.95rem;
  }
  .page-about .intro-visual {
    width: 70%;
    opacity: 0.08;
  }
  .page-about .service-card {
    padding: 1.25rem 1rem;
  }
  .page-about .data-stats {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.5rem;
  }
  .page-about .stat-value {
    font-size: 1.4rem;
  }
  .page-about .features-more {
    flex-direction: column;
  }
  .page-about .features-more .btn {
    text-align: center;
  }
}