.page-about {
  --border-radius: 16px;
  --border-width: 6px;
  --shadow-strong: 0 8px 24px rgba(0,0,0,0.25);
  --shadow-hover: 0 12px 32px rgba(0,0,0,0.35);
  --color-primary: #D4AF37;
  --color-primary-light: #F9E79F;
  --color-primary-dark: #B8962A;
  --color-secondary: #1A237E;
  --color-accent: #FF6F00;
  --color-accent-light: #FF8F00;
  --color-bg-dark: #0D1B2A;
  --color-bg-light: #F5F5F5;
  --color-text: #212121;
  --color-text-secondary: #757575;
  --color-text-on-dark: #FFFFFF;
  --color-border: #B0BEC5;
  --font-primary: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --font-secondary: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'Georgia', serif;
  --max-width: 1280px;

  background-color: var(--color-bg-light);
  color: var(--color-text);
  font-family: var(--font-secondary);
  line-height: 1.7;
  padding-bottom: 3rem;
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-primary);
  font-size: 0.875rem;
  margin-bottom: 2rem;
  padding: 1rem 0 0;
}
.page-about .breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
}
.page-about .breadcrumb a:hover {
  color: var(--color-accent);
}
.page-about .breadcrumb-separator {
  color: var(--color-text-secondary);
  margin: 0 0.25rem;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* 章节通用 */
.page-about .section-block {
  display: flex;
  flex-direction: column;
  position: relative;
  padding: 2rem 0;
}

.page-about .section-block__intro {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.page-about .section-number {
  font-family: var(--font-primary);
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--color-primary);
  opacity: 0.9;
}
.page-about .section-title {
  font-family: var(--font-primary);
  font-size: 2.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--color-text);
}
.page-about .section-subtitle {
  font-family: var(--font-primary);
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin: 0;
  flex-basis: 100%;
}
.page-about .section-annotation {
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

/* 分割线 */
.page-about .section-divider {
  width: 100%;
  height: 4px;
  margin: 2.5rem 0;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

/* 01 理念区 */
.page-about .philosophy-statement {
  font-size: 1.125rem;
  color: var(--color-text);
  margin-bottom: 1.5rem;
  max-width: 600px;
}
.page-about .brand-oath {
  border-left: 6px solid var(--color-primary);
  margin: 0;
  padding: 1rem 1.5rem;
  background: rgba(212, 175, 55, 0.08);
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-family: var(--font-primary);
  font-size: 1.25rem;
  font-weight: 700;
  font-style: italic;
  color: var(--color-primary-dark);
}
.page-about .brand-oath p {
  margin: 0;
}

/* 分屏布局 */
.page-about .split-screen {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.page-about .split-screen__panel--text {
  flex: 1;
}
.page-about .split-screen__panel--visual {
  flex-shrink: 0;
}
.page-about .img-container--square {
  width: 100%;
  max-width: 400px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-strong);
  border: var(--border-width) solid var(--color-primary);
}
.page-about .img-container--square img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1/1;
}
.page-about .img-container--hero {
  width: 100%;
  max-width: 600px;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-strong);
  border: var(--border-width) solid var(--color-secondary-light);
}
.page-about .img-container--hero img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 02 服务网格 */
.page-about .services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.page-about .service-card {
  background: var(--color-white, #FFFFFF);
  border: 4px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
  box-shadow: var(--shadow-strong);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
}
.page-about .service-card__icon {
  width: 80px;
  height: 80px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-about .service-card__icon img {
  display: block;
  width: 80px;
  height: 80px;
  object-fit: contain;
}
.page-about .service-card__title {
  font-family: var(--font-primary);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin: 0;
}
.page-about .service-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* 按钮 */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.5rem;
  border-radius: 8px;
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  transition: all 0.25s ease;
  border: 3px solid transparent;
  cursor: pointer;
}
.page-about .btn-accent {
  background: var(--color-accent);
  color: var(--color-text-on-dark);
  border-color: var(--color-accent);
}
.page-about .btn-accent:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
  transform: scale(1.03);
}
.page-about .btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.page-about .btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
}
.page-about .btn--small {
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
}
.page-about .btn--copy {
  margin-left: auto;
}

/* 03 联系区 */
.page-about .contact-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.page-about .contact-visual {
  display: flex;
  justify-content: center;
}
.page-about .contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-about .contact-card {
  background: var(--color-bg-dark);
  border: 4px solid var(--color-secondary-light);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--shadow-strong);
  color: var(--color-text-on-dark);
}
.page-about .contact-card__label {
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-basis: 100%;
}
.page-about .contact-card__value {
  font-family: var(--font-primary);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-on-dark);
}
.page-about .contact-card__note {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  width: 100%;
  margin-top: 0.25rem;
}

/* 桌面端样式 */
@media (min-width: 768px) {
  .page-about .section-block {
    padding: 3rem 0;
  }
  .page-about .section-number {
    font-size: 5rem;
  }
  .page-about .section-title {
    font-size: 3rem;
  }
  .page-about .split-screen {
    flex-direction: row;
    align-items: center;
  }
  .page-about .split-screen__panel--visual {
    margin-left: auto;
  }
  .page-about .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .contact-container {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-about .contact-visual {
    flex: 1;
  }
  .page-about .contact-details {
    flex: 1;
  }
  .page-about .contact-card__label {
    flex-basis: auto;
    width: auto;
    min-width: 100px;
  }
}

@media (min-width: 1024px) {
  .page-about .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}