/* ===== 页面专属：关于博万 (.page-about) ===== */
.page-about {
  --brand-large-font-size: clamp(3rem, 8vw, 6rem);
  --index-font-size: clamp(0.875rem, 1.5vw, 1.125rem);
  --hero-gap: 2rem;
  --section-padding-vertical: 4rem;
}

/* 首屏框架 */
.page-about .frame-hero {
  position: relative;
  padding: var(--section-padding-vertical) 0;
  text-align: center;
  background: var(--color-warm-white);
  overflow: hidden;
}

.page-about .hero-title {
  font-size: var(--brand-large-font-size);
  font-weight: var(--body-weight);  /* 细字重（继承 body-weight = 400） */
  letter-spacing: var(--letter-spacing-headings);
  color: var(--color-primary);
  line-height: 1.1;
  margin: 0;
}

.page-about .hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-accent);
  font-weight: var(--heading-weight);
  margin-top: 0.5rem;
}

.page-about .hero-index {
  font-size: var(--index-font-size);
  color: var(--color-text-medium);
  margin-top: 1rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
  letter-spacing: 0.05em;
}

/* 角标（复用共享类）位置调整 */
.page-about .corner-mark {
  width: 32px;
  height: 32px;
  border-color: var(--color-accent);
  opacity: 0.6;
}

/* 通用 section 间距 */
.page-about .section {
  padding: var(--section-padding-vertical) 0;
}

/* 图片包装 */
.page-about .img-wrapper img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-card);
  display: block;
}

/* 文字区对中 */
.page-about .text-wrapper {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* 资料整合卡片（复用共享 .card）悬停效果 */
.page-about .card {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.page-about .card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(10, 37, 64, 0.12);
}

/* 双列栅格对齐 */
.page-about .grid-2 {
  gap: 2rem;
  align-items: center;
}

/* 底部装饰条 */
.page-about .deco-bg {
  overflow: hidden;
  max-height: 200px;
}

.page-about .deco-bg img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

/* ===== 移动端适配 ===== */
@media (max-width: 768px) {
  .page-about {
    --section-padding-vertical: 2.5rem;
  }

  .page-about .frame-hero {
    padding: var(--section-padding-vertical) 0;
  }

  .page-about .hero-title {
    font-size: 2.5rem;
  }

  .page-about .hero-index {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1rem;
  }

  .page-about .grid-2 {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .page-about .img-wrapper img {
    max-width: 100%;
    margin: 0 auto;
  }

  .page-about .section {
    padding: var(--section-padding-vertical) 0;
  }

  .page-about .card:hover {
    transform: none;  /* 触屏设备避免悬停残留 */
  }
}