/* 品牌档案页面专属样式 - 限定于 .page-about 作用域 */
.page-about {
  --about-bg-accent: rgba(178, 34, 34, 0.04);
  --about-bg-gold: rgba(212, 175, 55, 0.06);
  --about-number-size: 4rem;
  --about-gap: 3rem;
  --about-max-width: 900px;

  max-width: var(--about-max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  color: var(--color-text, #1A1A1A);
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
}

/* 面包屑导航 */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary, #555);
}

.page-about .breadcrumb-link {
  color: var(--color-accent, #B22222);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  color: var(--color-gold, #D4AF37);
  outline: none;
}

.page-about .breadcrumb-separator {
  color: var(--color-gold, #D4AF37);
  font-weight: 700;
}

.page-about .breadcrumb-current {
  font-weight: 600;
  color: var(--color-text, #1A1A1A);
}

/* 编号章节体系 */
.page-about .about-section {
  position: relative;
  margin-bottom: var(--about-gap);
  padding: 2.5rem 2rem;
  background-color: var(--color-surface, #FFF);
  border-radius: 16px;
  box-shadow: 0 2px 12px var(--color-shadow, rgba(0,0,0,0.08));
  border-left: 4px solid var(--color-accent, #B22222);
  transition: box-shadow 0.3s ease;
}

.page-about .about-section:nth-child(3) {
  background-color: var(--about-bg-accent);
  border-left-color: var(--color-gold, #D4AF37);
}

.page-about .about-section:nth-child(4) {
  background-color: var(--about-bg-gold);
  border-left-color: var(--color-accent-light, #E63946);
}

.page-about .about-section:hover {
  box-shadow: 0 4px 24px var(--color-shadow, rgba(0,0,0,0.12));
}

.page-about .section-number-wrapper {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.page-about .section-number {
  font-family: var(--font-heading, 'Noto Serif SC', Georgia, serif);
  font-size: var(--about-number-size);
  font-weight: 700;
  font-style: italic;
  line-height: 1;
  color: var(--color-accent, #B22222);
  letter-spacing: -0.02em;
  opacity: 0.75;
}

.page-about .section-heading {
  font-family: var(--font-heading, 'Noto Serif SC', Georgia, serif);
  font-size: 1.75rem;
  font-weight: 700;
  font-style: italic;
  color: var(--color-text, #1A1A1A);
  margin: 0;
  line-height: 1.3;
}

.page-about .section-content {
  margin-top: 0.5rem;
}

.page-about .section-text {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #555);
  margin: 0 0 1rem;
  max-width: 70ch;
}

.page-about .section-text:last-of-type {
  margin-bottom: 1.5rem;
}

/* 图片区块 */
.page-about .image-block {
  margin: 1.5rem 0 0.5rem;
  border-radius: 12px;
  overflow: hidden;
  background-color: var(--color-bg, #F8F8F8);
  position: relative;
}

.page-about .about-image {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 12px;
}

/* SVG 装饰 */
.page-about .section-decoration {
  margin-top: 1.5rem;
  display: flex;
  justify-content: flex-end;
  opacity: 0.6;
}

.page-about .data-flow-svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* 联系列表 */
.page-about .contact-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-about .contact-item {
  font-size: 0.95rem;
  color: var(--color-text, #1A1A1A);
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.5;
}

.page-about .contact-item::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--color-gold, #D4AF37);
  font-size: 0.7rem;
  top: 0.25rem;
}

.page-about .contact-link {
  color: var(--color-accent, #B22222);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-accent-light, #E63946);
  transition: border-bottom-style 0.2s;
}

.page-about .contact-link:hover,
.page-about .contact-link:focus-visible {
  border-bottom-style: solid;
  outline: none;
}

/* CTA */
.page-about .section-cta {
  margin-top: 1.5rem;
  text-align: right;
}

.page-about .btn {
  display: inline-block;
  padding: 0.7rem 2rem;
  background-color: var(--color-accent, #B22222);
  color: var(--color-gold-light, #F0D060);
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 50px;
  text-decoration: none;
  transition: background-color 0.2s, transform 0.15s;
  border: none;
  cursor: pointer;
  line-height: 1.4;
}

.page-about .btn:hover,
.page-about .btn:focus-visible {
  background-color: var(--color-accent-light, #E63946);
  transform: translateY(-2px);
  outline: none;
}

/* 窄屏适配 - 移动端优先 */
@media (max-width: 640px) {
  .page-about {
    padding: 1.5rem 1rem 3rem;
  }

  .page-about .breadcrumb {
    font-size: 0.8rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
  }

  .page-about .about-section {
    padding: 1.75rem 1.25rem;
    margin-bottom: 2rem;
  }

  .page-about .section-number-wrapper {
    gap: 0.75rem;
  }

  .page-about .section-number {
    font-size: 2.75rem;
  }

  .page-about .section-heading {
    font-size: 1.35rem;
  }

  .page-about .section-text {
    font-size: 0.925rem;
  }

  .page-about .contact-list {
    gap: 0.5rem;
  }

  .page-about .contact-item {
    font-size: 0.875rem;
    padding-left: 1.25rem;
  }

  .page-about .section-cta {
    text-align: center;
  }
}

/* 桌面大屏适配 */
@media (min-width: 1024px) {
  .page-about {
    padding: 3rem 2rem 5rem;
  }

  .page-about .about-section {
    padding: 3rem 3rem;
  }

  .page-about .section-number {
    font-size: 5rem;
  }

  .page-about .section-heading {
    font-size: 2.25rem;
  }

  .page-about .section-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
  }

  .page-about .about-section:nth-child(2) .section-content {
    grid-template-areas: "text image";
  }

  .page-about .section-text {
    max-width: 55ch;
  }

  .page-about .image-block {
    margin: 0;
  }

  .page-about .contact-list {
    grid-column: 1 / -1;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1.5rem;
  }

  .page-about .contact-item {
    flex: 1 1 200px;
  }

  .page-about .section-cta {
    grid-column: 1 / -1;
    text-align: right;
  }

  .page-about .section-decoration {
    position: absolute;
    right: 2rem;
    top: 2rem;
    margin: 0;
    opacity: 0.4;
  }
}

/* 超宽屏限制 */
@media (min-width: 1400px) {
  .page-about {
    max-width: 1000px;
  }
}