/* ===== 品牌故事页专属样式 (page-about) ===== */
.page-about {
  --page-bg: var(--betbo-background);
  --page-text: var(--betbo-text);
  --page-primary: var(--betbo-primary);
  --page-accent: var(--betbo-accent);
  --page-highlight: var(--betbo-highlight);
  --page-secondary: var(--betbo-secondary);
  --page-surface: var(--betbo-surface);
  --page-font-heading: var(--betbo-font-heading);
  --page-font-body: var(--betbo-font-body);
  --page-radius: var(--betbo-radius);
  --page-transition: var(--betbo-transition);
  --page-gap: var(--betbo-gap);
  background-color: var(--page-bg);
  color: var(--page-text);
}

/* 面包屑 */
.page-about__breadcrumb {
  padding: 16px 20px 0;
  max-width: var(--betbo-container-max);
  margin: 0 auto;
  font-family: var(--page-font-body);
  font-weight: 300;
  font-size: 0.875rem;
  color: var(--betbo-highlight);
}
.page-about__breadcrumb a {
  color: var(--betbo-highlight);
  text-decoration: none;
  transition: color var(--page-transition);
}
.page-about__breadcrumb a:hover,
.page-about__breadcrumb a:focus-visible {
  color: var(--page-primary);
  outline: 2px solid var(--page-primary);
  outline-offset: 2px;
}
.page-about__breadcrumb__sep {
  margin: 0 8px;
  color: var(--betbo-highlight);
  opacity: 0.5;
}
.page-about__breadcrumb__current {
  color: var(--page-text);
  font-weight: 500;
}

/* ===== Hero 首屏 ===== */
.page-about__hero {
  position: relative;
  padding: 40px 0 48px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--page-secondary) 0%, #0f1f35 100%);
  color: #fff;
}
.page-about__hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
  position: relative;
  z-index: 2;
}
.page-about__hero-text {
  text-align: center;
  max-width: 720px;
}
.page-about__hero-title {
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 3rem;
  letter-spacing: var(--betbo-tracking-wide);
  line-height: 1.1;
  margin: 0 0 16px;
  color: #fff;
}
.page-about__hero-desc {
  font-family: var(--page-font-body);
  font-weight: 300;
  font-size: 1.125rem;
  line-height: 1.7;
  margin: 0 0 20px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.page-about__hero-glyph {
  display: inline-block;
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--page-primary);
  background: rgba(230, 57, 70, 0.15);
  padding: 6px 18px;
  border-radius: 20px;
  border: 1px solid rgba(230, 57, 70, 0.3);
}
.page-about__hero-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.page-about__hero-shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.08;
}
.page-about__hero-shape--1 {
  width: 480px;
  height: 480px;
  background: var(--page-primary);
  top: -160px;
  right: -100px;
}
.page-about__hero-shape--2 {
  width: 320px;
  height: 320px;
  background: var(--page-accent);
  bottom: -80px;
  left: -60px;
}
.page-about__hero-shape--3 {
  width: 200px;
  height: 200px;
  background: var(--page-highlight);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  filter: blur(60px);
  opacity: 0.06;
}

/* ===== 使命区 ===== */
.page-about__mission {
  padding: 60px 0 64px;
  background: var(--page-bg);
}
.page-about__mission-inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.page-about__mission-label {
  display: flex;
  align-items: center;
  gap: 16px;
}
.page-about__mission-title {
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: var(--betbo-tracking-wide);
  line-height: 1.2;
  margin: 0;
  color: var(--page-text);
  white-space: nowrap;
}
.page-about__mission-line {
  flex: 1;
  height: 3px;
  background: linear-gradient(90deg, var(--page-primary), transparent);
  border-radius: 2px;
}
.page-about__mission-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: center;
}
.page-about__mission-text {
  font-family: var(--page-font-body);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.8;
  margin: 0;
  max-width: 680px;
  color: var(--page-text);
}
.page-about__mission-img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: var(--page-radius);
  box-shadow: var(--betbo-shadow);
  flex-shrink: 0;
}

/* ===== 核心功能一览 ===== */
.page-about__features {
  padding: 60px 0 64px;
  background: var(--page-surface);
}
.page-about__features-title {
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: var(--betbo-tracking-wide);
  line-height: 1.2;
  margin: 0 0 40px;
  text-align: center;
  color: var(--page-text);
}
.page-about__features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-about__feature-card {
  background: var(--page-bg);
  border-radius: var(--page-radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--betbo-shadow);
  transition: transform var(--page-transition), box-shadow var(--page-transition);
  position: relative;
}
.page-about__feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(29, 53, 87, 0.18);
}
.page-about__feature-icon-wrap {
  position: relative;
  display: inline-block;
  margin-bottom: 16px;
}
.page-about__feature-icon {
  width: 120px;
  height: 120px;
  object-fit: contain;
  border-radius: var(--page-radius);
  background: var(--page-surface);
  padding: 8px;
  display: block;
  margin: 0 auto;
}
.page-about__feature-hint {
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%) translateY(100%);
  background: var(--page-secondary);
  color: #fff;
  font-family: var(--page-font-body);
  font-weight: 300;
  font-size: 0.8rem;
  line-height: 1.4;
  padding: 8px 14px;
  border-radius: var(--page-radius);
  white-space: nowrap;
  max-width: 220px;
  white-space: normal;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--page-transition), visibility var(--page-transition), transform var(--page-transition);
  z-index: 10;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}
.page-about__feature-card:hover .page-about__feature-hint,
.page-about__feature-card:focus-within .page-about__feature-hint {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(8px);
}
.page-about__feature-name {
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.03em;
  margin: 0;
  color: var(--page-text);
}

/* ===== 品牌原则 ===== */
.page-about__principles {
  padding: 60px 0 64px;
  background: var(--page-bg);
}
.page-about__principles-title {
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: var(--betbo-tracking-wide);
  line-height: 1.2;
  margin: 0 0 28px;
  text-align: center;
  color: var(--page-text);
}
.page-about__principles-visual {
  text-align: center;
  margin-bottom: 40px;
}
.page-about__principles-img {
  max-width: 100%;
  height: auto;
  border-radius: var(--page-radius);
  box-shadow: var(--betbo-shadow);
  object-fit: cover;
}
.page-about__principles-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.page-about__principle {
  display: flex;
  gap: 16px;
  background: var(--page-surface);
  border-radius: var(--page-radius);
  box-shadow: var(--betbo-shadow);
  overflow: hidden;
  transition: box-shadow var(--page-transition);
}
.page-about__principle:focus-within {
  box-shadow: 0 0 0 3px var(--page-primary), var(--betbo-shadow);
}
.page-about__principle-bar {
  width: 6px;
  flex-shrink: 0;
  background: var(--principle-color, var(--page-primary));
}
.page-about__principle-body {
  flex: 1;
  padding: 20px 20px 20px 0;
}
.page-about__principle-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.page-about__principle-name {
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.03em;
  margin: 0;
  color: var(--page-text);
}
.page-about__principle-toggle {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.page-about__principle-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--page-bg);
  cursor: pointer;
  transition: background var(--page-transition), transform var(--page-transition);
  flex-shrink: 0;
  border: 1px solid var(--betbo-highlight);
}
.page-about__principle-label:hover,
.page-about__principle-label:focus-visible {
  background: var(--page-primary);
  border-color: var(--page-primary);
  outline: none;
}
.page-about__principle-label:focus-visible {
  outline: 2px solid var(--page-primary);
  outline-offset: 2px;
}
.page-about__principle-arrow {
  display: block;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--page-text);
  border-bottom: 2px solid var(--page-text);
  transform: rotate(45deg);
  transition: transform var(--page-transition);
  margin-top: -4px;
}
.page-about__principle-toggle:checked + .page-about__principle-label .page-about__principle-arrow {
  transform: rotate(-135deg);
  margin-top: 4px;
}
.page-about__principle-brief {
  font-family: var(--page-font-body);
  font-weight: 300;
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
  color: var(--page-text);
}
.page-about__principle-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 4px 0 0;
}
.page-about__principle-detail p {
  font-family: var(--page-font-body);
  font-weight: 300;
  font-size: 0.9rem;
  line-height: 1.7;
  margin: 12px 0 0;
  color: var(--page-text);
  opacity: 0.88;
}
.page-about__principle-toggle:checked ~ .page-about__principle-detail {
  max-height: 320px;
  padding: 0 4px 8px 0;
}

/* ===== 信任与行动 ===== */
.page-about__trust {
  padding: 60px 0 64px;
  background: var(--page-secondary);
  color: #fff;
}
.page-about__trust-inner {
  text-align: center;
  max-width: 680px;
}
.page-about__trust-title {
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: var(--betbo-tracking-wide);
  line-height: 1.2;
  margin: 0 0 16px;
  color: #fff;
}
.page-about__trust-text {
  font-family: var(--page-font-body);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.7;
  margin: 0 0 32px;
  color: rgba(255, 255, 255, 0.85);
}
.page-about__trust-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.page-about__trust-btn {
  font-family: var(--page-font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  padding: 12px 28px;
  border-radius: var(--page-radius);
  text-decoration: none;
  transition: background var(--page-transition), color var(--page-transition), transform var(--page-transition);
}
.page-about__trust-btn.betbo-btn {
  background: var(--page-primary);
  color: #fff;
  border: none;
}
.page-about__trust-btn.betbo-btn:hover,
.page-about__trust-btn.betbo-btn:focus-visible {
  background: #c62e3a;
  transform: translateY(-2px);
  outline: 2px solid #fff;
  outline-offset: 2px;
}
.page-about__trust-btn.betbo-btn--outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.6);
}
.page-about__trust-btn.betbo-btn--outline:hover,
.page-about__trust-btn.betbo-btn--outline:focus-visible {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
  transform: translateY(-2px);
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* ===== 响应式 移动端优先 → 桌面 ===== */
@media (min-width: 768px) {
  .page-about__hero {
    padding: 60px 0 72px;
  }
  .page-about__hero-title {
    font-size: 4.5rem;
  }
  .page-about__hero-desc {
    font-size: 1.25rem;
  }
  .page-about__hero-glyph {
    font-size: 1rem;
    padding: 8px 24px;
  }

  .page-about__mission {
    padding: 80px 0 88px;
  }
  .page-about__mission-inner {
    flex-direction: row;
    align-items: flex-start;
    gap: 48px;
  }
  .page-about__mission-label {
    flex-direction: column;
    align-items: flex-start;
    min-width: 200px;
    gap: 12px;
  }
  .page-about__mission-line {
    width: 60px;
    height: 4px;
    flex: none;
  }
  .page-about__mission-title {
    font-size: 2rem;
    white-space: normal;
  }
  .page-about__mission-content {
    flex-direction: row;
    align-items: flex-start;
    gap: 32px;
  }
  .page-about__mission-text {
    font-size: 1.05rem;
    flex: 1;
  }
  .page-about__mission-img {
    width: 200px;
    height: 200px;
  }

  .page-about__features {
    padding: 80px 0 88px;
  }
  .page-about__features-title {
    font-size: 2rem;
    margin-bottom: 48px;
  }
  .page-about__features-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
  .page-about__feature-card {
    padding: 36px 24px;
  }
  .page-about__feature-hint {
    font-size: 0.85rem;
    max-width: 240px;
  }

  .page-about__principles {
    padding: 80px 0 88px;
  }
  .page-about__principles-title {
    font-size: 2rem;
    margin-bottom: 36px;
  }
  .page-about__principles-visual {
    margin-bottom: 48px;
  }
  .page-about__principles-list {
    gap: 24px;
  }
  .page-about__principle {
    gap: 20px;
  }
  .page-about__principle-bar {
    width: 8px;
  }
  .page-about__principle-body {
    padding: 24px 24px 24px 0;
  }
  .page-about__principle-name {
    font-size: 1.4rem;
  }
  .page-about__principle-brief {
    font-size: 1rem;
  }
  .page-about__principle-detail p {
    font-size: 0.95rem;
  }

  .page-about__trust {
    padding: 72px 0 80px;
  }
  .page-about__trust-title {
    font-size: 1.75rem;
  }
  .page-about__trust-text {
    font-size: 1.05rem;
  }
  .page-about__trust-btn {
    font-size: 1rem;
    padding: 14px 36px;
  }
}

@media (min-width: 1024px) {
  .page-about__hero-title {
    font-size: 5.5rem;
  }
  .page-about__hero-desc {
    font-size: 1.35rem;
  }
  .page-about__mission-title {
    font-size: 2.25rem;
  }
  .page-about__features-title {
    font-size: 2.25rem;
  }
  .page-about__principles-title {
    font-size: 2.25rem;
  }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  .page-about__principle-detail {
    transition: none;
  }
  .page-about__principle-arrow {
    transition: none;
  }
  .page-about__feature-card {
    transition: none;
  }
  .page-about__feature-card:hover {
    transform: none;
  }
  .page-about__feature-hint {
    transition: none;
  }
  .page-about__trust-btn {
    transition: none;
  }
  .page-about__trust-btn:hover {
    transform: none;
  }
}

.page-about {
  --principle-color: transparent;
}