/* ===== page-about 专属样式 ===== */
.page-about {
  --origin-max-width: 1200px;
  --card-min-width: 140px;
  --region-block-min-height: 80px;
  color: var(--color-text-primary, #e0e0e0);
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: var(--origin-max-width, 1200px);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  font-family: var(--font-body, 'Noto Serif SC', Georgia, serif);
  font-size: 0.9rem;
  color: var(--color-text-secondary, #a0a0a0);
}

.page-about .breadcrumb__item a {
  color: var(--color-primary, #1a7a2e);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s);
}

.page-about .breadcrumb__item a:hover,
.page-about .breadcrumb__item a:focus-visible {
  color: var(--color-highlight, #2d8f4e);
  text-decoration: underline;
}

.page-about .breadcrumb__item--current {
  color: var(--color-text-primary, #e0e0e0);
  font-weight: 600;
}

.page-about .breadcrumb__sep {
  margin: 0 0.4rem;
  color: var(--color-text-secondary, #a0a0a0);
}

/* 宽窄章节公共 */
.page-about .section--wide,
.page-about .section--narrow {
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.page-about .section--wide {
  max-width: 100%;
}

.page-about .section--narrow {
  max-width: var(--origin-max-width, 1200px);
}

.page-about .section__subtitle {
  font-family: var(--font-heading, 'Bebas Neue', Impact, sans-serif);
  font-size: 2.2rem;
  letter-spacing: 0.05em;
  color: var(--color-primary, #1a7a2e);
  margin-bottom: 0.75rem;
  border-bottom: 3px solid var(--color-primary, #1a7a2e);
  display: inline-block;
  padding-bottom: 0.25rem;
}

/* 品牌缘起 — 大背景图覆盖 */
.page-about .section--origin {
  position: relative;
  overflow: hidden;
  min-height: 400px;
  display: flex;
  align-items: flex-end;
  padding: 0 1.5rem 2rem;
}

.page-about .origin__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .origin__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: brightness(0.45) saturate(1.1);
}

.page-about .origin__overlay {
  position: relative;
  z-index: 1;
  max-width: var(--origin-max-width, 1200px);
  margin: 0 auto;
  width: 100%;
}

.page-about .origin__heading {
  font-family: var(--font-heading, 'Bebas Neue', Impact, sans-serif);
  font-size: 3rem;
  color: var(--color-accent-silver, #c0c0c0);
  text-shadow: 0 0 12px rgba(0,0,0,0.7);
  margin: 0 0 1rem;
  line-height: 1.1;
}

.page-about .origin__intro {
  font-family: var(--font-body, 'Noto Serif SC', Georgia, serif);
  font-size: 1.15rem;
  max-width: 640px;
  color: #f0f0f0;
  background: rgba(10,15,10,0.6);
  padding: 1rem 1.25rem;
  border-radius: var(--border-radius-sm, 8px);
  backdrop-filter: blur(2px);
  margin: 0;
}

/* 品牌故事 — 窄文本 */
.page-about .section--story .story__inner {
  padding: 0.5rem 0;
}

.page-about .story__text {
  font-family: var(--font-body, 'Noto Serif SC', Georgia, serif);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-secondary, #a0a0a0);
  margin-bottom: 1.2rem;
}

.page-about .story__text:first-of-type {
  margin-top: 0.5rem;
}

.page-about .story__inner .btn {
  margin-top: 0.75rem;
}

/* 数据引擎 */
.page-about .section--engine .engine__row {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  max-width: var(--origin-max-width, 1200px);
  margin: 0 auto;
  align-items: center;
}

.page-about .engine__content {
  flex: 1 1 55%;
  min-width: 280px;
}

.page-about .engine__desc {
  font-family: var(--font-body, 'Noto Serif SC', Georgia, serif);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #a0a0a0);
  margin-bottom: 1.5rem;
}

.page-about .engine__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--card-min-width, 140px), 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-about .card--stat {
  background: var(--color-surface, #141e14);
  border-radius: var(--border-radius-lg, 16px);
  padding: 1.25rem 1rem;
  text-align: center;
  border: 1px solid var(--color-primary-dark, #0d1b0e);
  transition: transform var(--transition-fast, 0.2s), box-shadow var(--transition-fast, 0.2s);
}

.page-about .card--stat:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(26,122,46,0.25);
}

.page-about .card__number {
  display: block;
  font-family: var(--font-heading, 'Bebas Neue', Impact, sans-serif);
  font-size: 2.8rem;
  color: var(--color-accent-silver, #c0c0c0);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.page-about .card__label {
  font-family: var(--font-body, 'Noto Serif SC', Georgia, serif);
  font-size: 0.9rem;
  color: var(--color-text-secondary, #a0a0a0);
  letter-spacing: 0.04em;
}

.page-about .engine__visual {
  flex: 1 1 35%;
  min-width: 220px;
}

.page-about .engine__img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-lg, 16px);
  object-fit: contain;
  background: var(--color-surface, #141e14);
  display: block;
}

/* 服务区域 — 地图色块 */
.page-about .section--region .region__inner {
  padding: 0.5rem 0;
}

.page-about .region__desc {
  font-family: var(--font-body, 'Noto Serif SC', Georgia, serif);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #a0a0a0);
  margin-bottom: 1.5rem;
}

.page-about .region__map {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.page-about .region__block {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: var(--region-block-min-height, 80px);
  border-radius: var(--border-radius-sm, 8px);
  font-family: var(--font-heading, 'Bebas Neue', Impact, sans-serif);
  font-size: 1.6rem;
  letter-spacing: 0.05em;
  color: #fff;
  cursor: pointer;
  transition: transform var(--transition-fast, 0.2s), filter var(--transition-fast, 0.2s);
}

.page-about .region__block:hover {
  transform: scale(1.04);
  filter: brightness(1.2);
}

.page-about .region__block--tier1 {
  background: var(--color-primary, #1a7a2e);
}

.page-about .region__block--tier2 {
  background: var(--color-accent-red, #e63946);
}

.page-about .region__block--tier3 {
  background: var(--color-data-blue, #3a86ff);
}

.page-about .region__block--tier4 {
  background: var(--color-accent-silver, #c0c0c0);
  color: var(--color-primary-dark, #0d1b0e);
}

.page-about .region__hint {
  font-family: var(--font-body, 'Noto Serif SC', Georgia, serif);
  font-size: 0.85rem;
  color: var(--color-text-secondary, #a0a0a0);
  font-style: italic;
  margin-top: 0.5rem;
  margin-bottom: 1.2rem;
}

/* 运营主体 */
.page-about .section--legal .legal__inner {
  padding: 0.5rem 0;
}

.page-about .legal__media {
  margin-bottom: 1.25rem;
}

.page-about .legal__img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-sm, 8px);
  object-fit: cover;
  display: block;
  max-height: 320px;
}

.page-about .legal__list {
  list-style: none;
  padding: 0;
  margin: 0 0 1rem;
  font-family: var(--font-body, 'Noto Serif SC', Georgia, serif);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-text-secondary, #a0a0a0);
}

.page-about .legal__list li {
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--color-surface, #141e14);
}

.page-about .legal__list li strong {
  color: var(--color-text-primary, #e0e0e0);
  display: inline-block;
  min-width: 80px;
}

.page-about .legal__note {
  font-family: var(--font-body, 'Noto Serif SC', Georgia, serif);
  font-size: 0.85rem;
  color: var(--color-text-secondary, #a0a0a0);
  border-left: 3px solid var(--color-primary, #1a7a2e);
  padding-left: 0.75rem;
  margin-bottom: 1.2rem;
}

/* 按钮变体 override */
.page-about .btn--outline {
  border: 2px solid var(--color-primary, #1a7a2e);
  color: var(--color-primary, #1a7a2e);
  background: transparent;
}

.page-about .btn--outline:hover,
.page-about .btn--outline:focus-visible {
  background: var(--color-primary, #1a7a2e);
  color: #fff;
}

.page-about .btn--ghost {
  color: var(--color-text-secondary, #a0a0a0);
  border: 1px solid transparent;
  transition: color var(--transition-fast, 0.2s), border-color var(--transition-fast, 0.2s);
}

.page-about .btn--ghost:hover,
.page-about .btn--ghost:focus-visible {
  color: var(--color-primary, #1a7a2e);
  border-color: var(--color-primary, #1a7a2e);
}

/* 移动端优先样式 */
@media (max-width: 768px) {
  .page-about .origin__heading {
    font-size: 2.2rem;
  }

  .page-about .origin__intro {
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
  }

  .page-about .section--origin {
    min-height: 320px;
    padding: 0 1rem 1.5rem;
  }

  .page-about .section--wide,
  .page-about .section--narrow {
    padding: 1.5rem 1rem;
  }

  .page-about .section__subtitle {
    font-size: 1.8rem;
  }

  .page-about .engine__row {
    flex-direction: column;
  }

  .page-about .engine__visual {
    order: -1;
  }

  .page-about .engine__img {
    max-height: 280px;
    width: 100%;
  }

  .page-about .region__map {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .region__block {
    min-height: 70px;
    font-size: 1.3rem;
  }

  .page-about .legal__list li strong {
    min-width: 60px;
  }

  .page-about .breadcrumb {
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
  }
}

/* 中等屏幕适配 */
@media (min-width: 769px) and (max-width: 1024px) {
  .page-about .origin__heading {
    font-size: 2.6rem;
  }

  .page-about .section--origin {
    min-height: 360px;
  }
}