.page-about {
  --about-accent: #D94F14;
  --about-accent-soft: #F5E6D6;
  --about-card-bg: #FDFBF5;
  --about-border-light: #E8DCC8;
  --about-radius-card: 20px;
  --about-radius-icon: 16px;
  --about-gap: 2rem;
  --about-section-gap: 3.5rem;
}

/* ── 面包屑 ── */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--about-border-light);
}
.page-about .breadcrumb-link {
  color: var(--about-accent);
  text-decoration: none;
  transition: color 0.2s;
}
.page-about .breadcrumb-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}
.page-about .breadcrumb-sep {
  font-size: 0.7rem;
  color: var(--text-secondary);
}
.page-about .breadcrumb-current {
  color: var(--text-primary);
  font-weight: 600;
}

/* ── 品牌定位 ── */
.page-about .about-identity {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: var(--about-section-gap);
  position: relative;
}
.page-about .identity-text {
  order: 1;
}
.page-about .identity-title {
  font-family: var(--font-heading);
  font-size: 3rem;
  line-height: 1.1;
  color: var(--text-primary);
  margin: 0 0 0.25rem;
  letter-spacing: -0.02em;
}
.page-about .identity-subtitle {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--about-accent);
  margin: 0 0 1.25rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.page-about .identity-desc {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-primary);
  max-width: 36em;
  margin: 0;
}
.page-about .identity-figure {
  order: 2;
  position: relative;
  margin: 0;
}
.page-about .identity-img {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--about-radius-card);
  box-shadow: 0 4px 20px rgba(43,43,43,0.08);
  border: 2px solid var(--about-border-light);
}
/* 装饰框（复古窗口风格） */
.page-about .identity-figure::before {
  content: "";
  position: absolute;
  top: -10px;
  left: -10px;
  width: 100%;
  height: 100%;
  max-width: 400px;
  border: 2px dashed var(--about-accent);
  border-radius: var(--about-radius-card);
  opacity: 0.3;
  pointer-events: none;
  z-index: 0;
}

/* ── 服务范围 ── */
.page-about .about-services {
  margin-bottom: var(--about-section-gap);
  position: relative;
}
.page-about .services-header {
  margin-bottom: 1.75rem;
}
.page-about .services-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  color: var(--text-primary);
  margin: 0 0 0.4rem;
  position: relative;
  display: inline-block;
}
.page-about .services-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: var(--about-accent);
  border-radius: 4px;
  margin-top: 6px;
}
.page-about .services-intro {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 0.5rem 0 0;
}
.page-about .services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.page-about .service-card {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  background: var(--about-card-bg);
  border: 1px solid var(--about-border-light);
  border-radius: var(--about-radius-card);
  padding: 1.25rem 1.25rem 1.25rem 1.5rem;
  transition: box-shadow 0.25s, border-color 0.25s;
  cursor: default;
}
.page-about .service-card:hover {
  border-color: var(--about-accent);
  box-shadow: 0 6px 24px rgba(217,79,20,0.08);
}
.page-about .service-icon-wrap {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: var(--about-radius-icon);
  background: var(--about-accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 2px solid transparent;
  transition: border-color 0.25s;
}
.page-about .service-card:hover .service-icon-wrap {
  border-color: var(--about-accent);
}
.page-about .service-icon {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: calc(var(--about-radius-icon) - 2px);
}
.page-about .service-body {
  flex: 1;
  min-width: 0;
}
.page-about .service-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--text-primary);
  margin: 0 0 0.35rem;
  font-weight: 700;
}
.page-about .service-summary {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* ── 数据承诺 ── */
.page-about .about-commitment {
  margin-bottom: var(--about-section-gap);
  background: var(--about-accent-soft);
  border-radius: var(--about-radius-card);
  padding: 2rem 1.5rem;
  border-left: 6px solid var(--about-accent);
  position: relative;
}
.page-about .commitment-header {
  margin-bottom: 1.75rem;
}
.page-about .commitment-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--text-primary);
  margin: 0 0 0.25rem;
}
.page-about .commitment-intro {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--about-accent);
  letter-spacing: 0.1em;
  margin: 0;
}
.page-about .commitment-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.page-about .commitment-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--about-card-bg);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 2px 8px rgba(43,43,43,0.04);
}
.page-about .commitment-icon {
  font-size: 1.5rem;
  color: var(--about-accent);
  line-height: 1.4;
  flex-shrink: 0;
}
.page-about .commitment-content {
  flex: 1;
  min-width: 0;
}
.page-about .commitment-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--text-primary);
  margin: 0 0 0.3rem;
}
.page-about .commitment-desc {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

/* ── 内部链接导航 ── */
.page-about .about-internal {
  margin-bottom: 0;
  padding-top: 1rem;
  border-top: 1px solid var(--about-border-light);
}
.page-about .internal-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--text-primary);
  margin: 0 0 1.25rem;
}
.page-about .internal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.page-about .internal-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--about-accent);
  background: var(--about-card-bg);
  border: 1px solid var(--about-border-light);
  border-radius: 40px;
  padding: 0.7rem 1.5rem;
  text-decoration: none;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.page-about .internal-link:hover {
  background: var(--about-accent);
  border-color: var(--about-accent);
  color: #fff;
}
.page-about .internal-arrow {
  font-size: 1.2rem;
  line-height: 1;
  transition: transform 0.2s;
}
.page-about .internal-link:hover .internal-arrow {
  transform: translateX(4px);
}

/* ── 桌面端 (≥768px) ── */
@media (min-width: 768px) {
  .page-about .about-identity {
    grid-template-columns: 1.2fr 0.9fr;
    gap: 2.5rem;
    align-items: start;
  }
  .page-about .identity-title {
    font-size: 4rem;
  }
  .page-about .identity-subtitle {
    font-size: 1.5rem;
  }
  .page-about .identity-figure {
    margin-top: 1.8rem;
  }
  .page-about .identity-figure::before {
    top: -14px;
    left: -14px;
  }

  .page-about .services-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .page-about .about-commitment {
    padding: 2.5rem 2.5rem;
  }
  .page-about .commitment-list {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.5rem;
  }
  .page-about .commitment-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .page-about .commitment-icon {
    font-size: 1.8rem;
  }

  .page-about .internal-links {
    gap: 1.25rem;
  }
}

/* ── 宽屏 (≥1024px) ── */
@media (min-width: 1024px) {
  .page-about .identity-title {
    font-size: 5rem;
  }
  .page-about .identity-desc {
    font-size: 1.1rem;
  }
  .page-about .services-title {
    font-size: 2.5rem;
  }
  .page-about .commitment-title {
    font-size: 2.3rem;
  }
}

/* ── 确保图片响应 ── */
.page-about img {
  max-width: 100%;
  height: auto;
}

/* ── 减少动效偏好 ── */
@media (prefers-reduced-motion: reduce) {
  .page-about .service-card,
  .page-about .internal-link,
  .page-about .internal-arrow {
    transition: none;
  }
  .page-about .identity-figure::before {
    display: none;
  }
}