.page-about {
  --page-bg: var(--color-bg-dark, #212121);
  --page-card-bg: var(--color-bg-card, #2C2C2C);
  --page-red: var(--color-red, #E53935);
  --page-blue: var(--color-blue, #1E88E5);
  --page-yellow: var(--color-yellow, #FFC107);
  --page-text: var(--color-text-primary, #FFFFFF);
  --page-text-secondary: var(--color-text-secondary, #B0BEC5);
  --page-font-heading: var(--font-heading, 'Impact', 'Montserrat Black', sans-serif);
  --page-font-body: var(--font-body, 'Inter', system-ui, sans-serif);

  background-color: var(--page-bg);
  color: var(--page-text);
  font-family: var(--page-font-body);
  line-height: 1.6;
  padding: 2rem 0;
}

/* 面包屑 */
.page-about .breadcrumbs {
  font-size: 0.875rem;
  color: var(--page-text-secondary);
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
}

.page-about .breadcrumbs__link {
  color: var(--page-blue);
  text-decoration: none;
}

.page-about .breadcrumbs__link:hover {
  text-decoration: underline;
}

.page-about .breadcrumbs__separator {
  color: var(--page-text-secondary);
}

.page-about .breadcrumbs__current {
  color: var(--page-text);
  font-weight: 600;
}

/* 标题 */
.page-about__title {
  font-family: var(--page-font-heading);
  font-size: 3rem;
  margin: 0 0 2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--page-red);
  transform: skewX(-10deg);
  transform-origin: left;
}

@media (min-width: 768px) {
  .page-about__title {
    font-size: 4.5rem;
  }
}

/* 翻页区 */
.page-about__flip {
  position: relative;
  margin-bottom: 4rem;
  overflow: hidden;
  border-radius: 4px;
}

.page-about__flip-scene {
  perspective: 1200px;
}

.page-about__flip-page {
  position: relative;
  min-height: 300px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  background: var(--page-card-bg);
  border: 1px solid var(--page-blue);
  padding: 2rem 1.5rem;
  transform: rotateY(0deg);
  animation: pageAboutFlipIn 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
  transform-origin: left center;
}

@keyframes pageAboutFlipIn {
  0% {
    transform: rotateY(-90deg);
    opacity: 0;
  }
  100% {
    transform: rotateY(0deg);
    opacity: 1;
  }
}

.page-about__flip-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about__flip-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.page-about__flip-content {
  position: relative;
  z-index: 1;
  flex: 1 1 300px;
  padding-right: 1.5rem;
}

.page-about__flip-heading {
  font-family: var(--page-font-heading);
  font-size: 2.5rem;
  margin: 0 0 1rem;
  color: var(--page-yellow);
  transform: skewX(-8deg);
}

@media (min-width: 768px) {
  .page-about__flip-heading {
    font-size: 3.5rem;
  }
}

.page-about__flip-text {
  font-size: 1.125rem;
  color: var(--page-text-secondary);
  max-width: 40ch;
}

.page-about__flip-deco {
  position: relative;
  z-index: 1;
  flex: 0 0 200px;
  margin: 1rem 0 0 0;
}

.page-about__flip-deco-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  border: 2px solid var(--page-red);
}

@media (min-width: 600px) {
  .page-about__flip-deco {
    flex: 0 0 250px;
    margin: 0 0 0 auto;
  }
}

/* 服务区 */
.page-about__services {
  margin-bottom: 4rem;
}

.page-about__section-title {
  font-family: var(--page-font-heading);
  font-size: 2rem;
  margin: 0 0 2rem;
  color: var(--page-blue);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

@media (min-width: 768px) {
  .page-about__section-title {
    font-size: 2.8rem;
  }
}

.page-about__cards {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.page-about__card {
  flex: 1 1 260px;
  background: var(--page-card-bg);
  padding: 1.5rem;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: border-color 0.3s, transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about__card:hover {
  border-color: var(--page-yellow);
  transform: translateY(-4px);
}

.page-about__card-icon {
  color: var(--page-red);
  margin-bottom: 1rem;
  transition: color 0.3s;
}

.page-about__card:hover .page-about__card-icon {
  color: var(--page-yellow);
}

.page-about__card-title {
  font-family: var(--page-font-heading);
  font-size: 1.5rem;
  margin: 0 0 0.5rem;
  color: var(--page-text);
  text-transform: uppercase;
}

.page-about__card-text {
  color: var(--page-text-secondary);
  font-size: 0.95rem;
  margin: 0;
}

/* 联系方式区 */
.page-about__contact {
  margin-bottom: 3rem;
}

.page-about__contact-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: flex-start;
  background: var(--page-card-bg);
  padding: 2rem;
  border-radius: 4px;
  border: 1px solid var(--page-red);
}

.page-about__contact-fig {
  flex: 0 0 200px;
  margin: 0;
}

.page-about__contact-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 4px;
  border: 2px solid var(--page-blue);
}

@media (min-width: 600px) {
  .page-about__contact-fig {
    flex: 0 0 250px;
  }
}

.page-about__contact-dl {
  flex: 1 1 300px;
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem 1rem;
  align-items: baseline;
}

.page-about__contact-term {
  font-family: var(--page-font-heading);
  font-size: 1rem;
  color: var(--page-yellow);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.page-about__contact-desc {
  color: var(--page-text);
  font-size: 1rem;
}

.page-about__contact-desc a {
  color: var(--page-blue);
  text-decoration: none;
}

.page-about__contact-desc a:hover {
  text-decoration: underline;
}

.page-about__contact-note {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--page-text-secondary);
  text-align: center;
}

/* 相关链接 */
.page-about__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: center;
  padding-top: 2rem;
  border-top: 2px solid var(--color-line-grad, #E53935);
}

.page-about__links-item {
  font-family: var(--page-font-heading);
  font-size: 1rem;
  color: var(--page-red);
  text-transform: uppercase;
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color 0.3s;
}

.page-about__links-item:hover {
  color: var(--page-yellow);
}

/* 移动端优化 */
@media (max-width: 599px) {
  .page-about__flip-page {
    padding: 1.5rem 1rem;
  }

  .page-about__flip-deco {
    display: none;
  }

  .page-about__contact-wrapper {
    padding: 1.5rem;
  }

  .page-about__contact-dl {
    grid-template-columns: 1fr;
    gap: 0.25rem 0;
  }

  .page-about__card {
    flex: 1 1 100%;
  }
}