.page-about {
  --about-accent: var(--accent-orange);
  --about-bg-alt: var(--primary-dark);
  --about-text-light: var(--text-light);
  --about-card-gap: clamp(1rem, 2vw, 1.5rem);
  --about-img-radius: 6px;
  --about-transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.page-about .container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--content-pad);
}

/* 面包屑 */
.page-about .breadcrumb {
  padding: 1.5rem 0 0.5rem;
  font-family: var(--font-body);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted-text);
}

.page-about .breadcrumb a {
  color: var(--muted-text);
  text-decoration: none;
  transition: color var(--about-transition);
}

.page-about .breadcrumb a:hover {
  color: var(--accent-orange);
}

.page-about .breadcrumb__sep {
  margin: 0 0.5rem;
  color: var(--divider-color);
}

/* 节索引 */
.page-about .section-index {
  font-family: var(--font-body);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-orange);
  margin: 0 0 0.75rem;
  position: relative;
  display: inline-block;
  padding-left: 1.5rem;
}

.page-about .section-index::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 1rem;
  height: 2px;
  background: var(--accent-orange);
  transform: translateY(-50%);
}

/* 页面标题 */
.page-about .about__intro {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  padding: 2rem 0 3rem;
  border-bottom: 1px solid var(--divider-color);
  margin-bottom: 2rem;
}

.page-about .about__intro-text {
  flex: 1 1 55%;
  min-width: 280px;
}

.page-about .about__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-dark);
  margin: 0 0 1rem;
  text-transform: uppercase;
}

.page-about .about__tagline {
  font-family: var(--font-body);
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--muted-text);
  max-width: 480px;
}

.page-about .about__intro-visual {
  flex: 1 1 35%;
  min-width: 200px;
}

.page-about .about__hero-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--about-img-radius);
  display: block;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 6px 6px, calc(100% - 6px) 6px, calc(100% - 6px) calc(100% - 6px), 6px calc(100% - 6px));
}

/* 品牌故事 */
.page-about .about__story {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  padding: 3rem 0 2rem;
  margin-bottom: 2rem;
}

.page-about .about__story-content {
  flex: 1 1 55%;
  min-width: 280px;
}

.page-about .about__story-content .section-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text-dark);
  margin: 0 0 1.5rem;
}

.page-about .about__story-content .content-body p {
  margin: 0 0 1.2rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-dark);
}

.page-about .about__story-visual {
  flex: 1 1 35%;
  min-width: 200px;
  align-self: center;
}

.page-about .about__story-visual img {
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--about-img-radius);
  display: block;
  clip-path: polygon(6px 0, 100% 0, 100% 100%, 0 100%, 6px 6px, calc(100% - 6px) 6px, calc(100% - 6px) calc(100% - 6px), 6px calc(100% - 6px));
}

/* 核心数据区域 */
.page-about .about__data {
  padding: 2rem 0 2rem;
  margin-bottom: 2rem;
  border-top: 1px solid var(--divider-color);
  border-bottom: 1px solid var(--divider-color);
}

.page-about .about__data .section-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text-dark);
  margin: 0 0 2rem;
}

.page-about .about__data-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--about-card-gap);
}

.page-about .card--data {
  background: var(--warm-paper-light);
  border: 1px solid var(--divider-color);
  border-radius: 6px;
  padding: 1.5rem 1.5rem 1rem;
  transition: transform var(--about-transition), box-shadow var(--about-transition), border-color var(--about-transition);
  position: relative;
  cursor: pointer;
}

.page-about .card--data:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-orange);
}

.page-about .card__icon {
  margin-bottom: 0.75rem;
}

.page-about .card__number {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--accent-orange);
  letter-spacing: -0.03em;
  line-height: 1;
  border-bottom: 3px solid var(--accent-orange);
  padding-bottom: 0.25rem;
}

.page-about .card__number--accent {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
}

.page-about .card__title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--text-dark);
  letter-spacing: -0.01em;
}

.page-about .card__desc {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--muted-text);
  margin: 0 0 1rem;
}

.page-about .card__detail {
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-dark);
  margin: 1rem 0;
  padding: 0.75rem;
  background: var(--warm-paper);
  border-radius: 4px;
  border-left: 3px solid var(--accent-orange);
}

.page-about .card__detail ul {
  margin: 0;
  padding-left: 1.2rem;
  list-style: disc;
}

.page-about .card__detail li {
  margin-bottom: 0.3rem;
}

.page-about .card__toggle {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  padding: 0.35rem 1rem;
  background: var(--accent-orange);
  color: var(--text-light);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background var(--about-transition), transform 0.15s ease;
  font-family: var(--font-body);
  font-weight: 600;
}

.page-about .card__toggle:hover {
  background: var(--accent-green);
  transform: scale(0.98);
}

/* 联系信息 */
.page-about .about__contact {
  padding: 2rem 0 3rem;
}

.page-about .about__contact .section-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text-dark);
  margin: 0 0 2rem;
}

.page-about .about__contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--about-card-gap);
}

.page-about .card--contact {
  background: var(--warm-paper-light);
  border: 1px solid var(--divider-color);
  border-radius: 6px;
  padding: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  transition: transform var(--about-transition), box-shadow var(--about-transition);
}

.page-about .card--contact:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.page-about .contact__icon {
  width: 48px;
  height: 48px;
  object-fit: contain;
  flex-shrink: 0;
}

.page-about .contact__info {
  flex: 1;
  min-width: 160px;
}

.page-about .contact__label {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0 0 0.3rem;
  color: var(--text-dark);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.page-about .contact__value {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--accent-orange);
  text-decoration: none;
  word-break: break-all;
  transition: color var(--about-transition);
}

.page-about .contact__value:hover {
  color: var(--accent-green);
  text-decoration: underline;
}

.page-about .contact__value--address {
  font-style: normal;
  color: var(--text-dark);
}

.page-about .contact__note {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--muted-text);
  margin: 0.5rem 0 0;
  width: 100%;
  line-height: 1.4;
}

.page-about .contact__disclaimer {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--muted-text);
  margin-top: 1.5rem;
  text-align: center;
  line-height: 1.5;
  border-top: 1px solid var(--divider-color);
  padding-top: 1.5rem;
}

/* 移动端调整 */
@media (max-width: 640px) {
  .page-about .about__intro {
    flex-direction: column-reverse;
    padding: 1.5rem 0 2rem;
  }

  .page-about .about__intro-text {
    min-width: unset;
  }

  .page-about .about__intro-visual {
    min-width: unset;
    width: 100%;
  }

  .page-about .about__story {
    flex-direction: column;
    padding: 2rem 0 1.5rem;
  }

  .page-about .about__story-visual {
    order: -1;
    min-width: unset;
    width: 100%;
  }

  .page-about .about__data-grid {
    grid-template-columns: 1fr;
  }

  .page-about .about__contact-grid {
    grid-template-columns: 1fr;
  }

  .page-about .card--contact {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-about .contact__icon {
    align-self: flex-start;
  }

  .page-about .about__title {
    font-size: 1.8rem;
  }

  .page-about .about__story-content .section-title,
  .page-about .about__data .section-title,
  .page-about .about__contact .section-title {
    font-size: 1.4rem;
  }
}