/* page-about - 关于我们页面专属样式 */
.page-about {
  --about-gap: 2rem;
  --about-card-gap: 1.5rem;
  --about-label-bg: var(--accent-orange);
  --about-border: 2px solid var(--accent-orange);
}
.page-about .container {
  padding: 0 1rem;
  max-width: var(--max-width);
  margin: 0 auto;
}
.page-about h1 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--primary-dark-blue);
  margin: 1rem 0 2rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}
.page-about h2 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--primary-dark-blue);
  margin-bottom: 1rem;
  position: relative;
}
.page-about h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent-orange);
  margin-top: 0.5rem;
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}
.page-about .breadcrumb-item {
  color: var(--text-secondary);
  text-decoration: none;
}
.page-about .breadcrumb-item[aria-current="page"] {
  color: var(--primary-dark-blue);
  font-weight: 600;
}
.page-about .breadcrumb-item:not(:last-child)::after {
  content: '/';
  margin-left: 0.5rem;
  color: var(--text-secondary);
}

/* 品牌定位区域 — 杂志式双列布局 */
.page-about .about-hero {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
  margin-bottom: 4rem;
  padding: 2rem 0;
  border-top: var(--about-border);
  border-bottom: 2px solid var(--primary-blue);
  background: var(--neutral-light);
}
.page-about .about-hero__main {
  order: 2;
}
.page-about .about-hero__note {
  order: 1;
}
.page-about .about-hero__note-inner {
  position: relative;
  padding: 0.5rem;
  background: var(--white);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  border: 1px solid var(--neutral-dark);
  transform: rotate(-1deg);
}
.page-about .about-hero__image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-hero__lead {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--neutral-dark);
  margin-bottom: 1.5rem;
}
.page-about .about-hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* 核心能力区域 — 卡片网格 */
.page-about .about-capabilities {
  margin-bottom: 4rem;
}
.page-about .capabilities-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-card-gap);
}
.page-about .capability-card {
  background: var(--white);
  border: 1px solid var(--neutral-light);
  padding: 1.5rem;
  border-radius: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  position: relative;
}
.page-about .capability-card[data-hover]:hover {
  box-shadow: 0 8px 24px rgba(255, 111, 0, 0.15);
  transform: translateY(-4px);
}
.page-about .capability-card__header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}
.page-about .capability-card__number {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--accent-orange);
  line-height: 1;
}
.page-about .capability-card h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary-dark-blue);
  margin: 0;
}
.page-about .capability-card p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--neutral-dark);
}
.page-about .capability-card__image {
  width: 100%;
  height: auto;
  object-fit: cover;
  margin-top: 1rem;
  border: 1px solid var(--neutral-light);
}
.page-about .capability-details {
  margin-top: 1rem;
}
.page-about .capability-details summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--accent-orange);
  font-family: var(--font-head);
}
.page-about .capability-details[data-expand] summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}
.page-about .capability-details[data-expand] summary::after {
  content: '▸';
  transition: transform 0.2s;
}
.page-about .capability-details[data-expand][open] summary::after {
  transform: rotate(90deg);
}
.page-about .capability-details p {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--neutral-light);
  font-size: 0.9rem;
}

/* 运营主体区域 */
.page-about .about-operations {
  margin-bottom: 4rem;
  padding-top: 2rem;
  border-top: var(--about-border);
}
.page-about .operations-grid {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
}
.page-about .operations-info {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--neutral-dark);
}
.page-about .operations-contact {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}
.page-about .operations-contact li {
  padding: 0.4rem 0;
  border-bottom: 1px dashed var(--neutral-light);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}
.page-about .operations-contact li::before {
  content: '◆';
  color: var(--accent-orange);
  font-size: 0.6rem;
}
.page-about .operations-icp {
  font-family: var(--font-mono);
  color: var(--primary-blue);
  font-size: 0.9rem;
  margin-top: 1rem;
}
.page-about .operations-visual {
  order: -1;
}
.page-about .operations-image {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--primary-blue);
  filter: saturate(0.6);
}

/* 备注文字 */
.page-about .note {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-style: italic;
  margin: 0.5rem 0;
}

/* 桌面端布局 (>= 768px) */
@media (min-width: 768px) {
  .page-about .container {
    padding: 0 2rem;
  }
  .page-about .about-hero {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about .about-hero__main {
    flex: 3;
    order: 1;
    padding-right: 2rem;
  }
  .page-about .about-hero__note {
    flex: 1;
    order: 2;
    max-width: 300px;
  }
  .page-about .about-hero__note-inner {
    transform: rotate(1deg) translateY(-10px);
  }
  .page-about .capabilities-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .page-about .operations-grid {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about .operations-info {
    flex: 2;
    order: 1;
  }
  .page-about .operations-visual {
    flex: 1;
    order: 2;
    max-width: 300px;
  }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  .page-about .capability-card {
    transition: none;
  }
  .page-about .capability-details summary::after {
    transition: none;
  }
}