.page-about {
  --about-radius-lg: 24px;
  --about-radius-md: 18px;
  --about-timeline-line: rgba(10, 37, 64, 0.16);
  --about-hero-line: rgba(255, 255, 255, 0.16);
  scroll-padding-top: calc(var(--header-h) + 24px);
  background-color: var(--color-bg);
}

.page-about .section {
  padding: 56px 0;
}

.page-about .about-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.page-about .about-heading--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.page-about .about-heading .section-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--color-info);
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.page-about .about-heading h2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  line-height: 1.28;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.page-about .about-heading .section-intro {
  color: var(--color-text-light);
  font-size: 1rem;
  line-height: 1.75;
  margin: 0;
}

/* 首屏章节预览 */
.page-about .about-hero {
  background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 55%, #16486c 100%);
  color: #ffffff;
  padding: 40px 0 56px;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 194, 209, 0.35) 0%, transparent 70%);
  top: -80px;
  right: -60px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-info), var(--color-accent));
  opacity: 0.85;
}

.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 32px;
  display: flex;
  gap: 10px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85rem;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
}

.page-about .about-hero__copy .section-eyebrow {
  color: #9adbe5;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  line-height: 1.22;
  margin: 12px 0 18px;
  max-width: 760px;
  color: #ffffff;
}

.page-about .about-hero__lead {
  font-size: 1.05rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.82);
  max-width: 640px;
  margin: 0;
}

.page-about .about-hero__map {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 12px;
}

.page-about .about-map__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--about-hero-line);
  text-decoration: none;
  color: #ffffff;
  transition: background 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-map__item:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(0, 194, 209, 0.5);
  transform: translateY(-2px);
}

.page-about .about-map__num {
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--color-info);
}

.page-about .about-map__label {
  font-size: 0.9rem;
  font-weight: 500;
}

/* 品牌故事 */
.page-about .about-story {
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-label-bg) 100%);
}

.page-about .about-story__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-story__media,
.page-about .about-team__media,
.page-about .about-journey__figure {
  margin: 0;
}

.page-about .about-story__img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  display: block;
}

.page-about .about-story__body h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.32;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.page-about .about-story__body p {
  color: var(--color-text);
  line-height: 1.82;
  margin-bottom: 16px;
}

.page-about .about-story__body .btn-primary {
  margin-top: 8px;
}

/* 发展历程时间轴 */
.page-about .about-journey {
  background: var(--color-bg);
}

.page-about .about-timeline {
  display: grid;
  gap: 24px;
  margin-top: 36px;
}

.page-about .timeline-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 20px;
}

.page-about .timeline-item__mark {
  display: flex;
  flex-direction: column;
  align-items: center;
  align-self: stretch;
  position: relative;
}

.page-about .timeline-item__mark::after {
  content: "";
  flex: 1;
  width: 2px;
  min-height: 24px;
  background: var(--about-timeline-line);
  margin-top: 12px;
  border-radius: 2px;
}

.page-about .timeline-item:last-child .timeline-item__mark::after {
  display: none;
}

.page-about .timeline-item__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.05rem;
  box-shadow: var(--shadow-sm);
  transition: background 0.3s ease, transform 0.3s ease;
}

.page-about .timeline-item:hover .timeline-item__num {
  background: var(--color-accent);
  transform: scale(1.05);
}

.page-about .timeline-item__tag {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: var(--color-label-bg);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.page-about .timeline-item__card {
  background: var(--color-surface);
  border: 1px solid rgba(10, 37, 64, 0.08);
  border-left: 4px solid var(--color-info);
  border-radius: var(--about-radius-md);
  padding: 20px 22px;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-left-color 0.3s ease;
}

.page-about .timeline-item__card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.page-about .timeline-item__card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--color-text);
}

.page-about .timeline-item:hover .timeline-item__card {
  background: var(--color-label-bg);
  border-left-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.page-about .about-journey__figure {
  margin-top: 44px;
}

.page-about .about-journey__img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  display: block;
}

/* 数据与能力 */
.page-about .about-data {
  background: var(--color-bg);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .stat-card {
  background: var(--color-label-bg);
  border: 1px solid rgba(10, 37, 64, 0.06);
  border-radius: var(--about-radius-md);
  padding: 24px 20px 24px 28px;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

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

.page-about .stat-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 4px;
  border-radius: 0 8px 8px 0;
  background: var(--color-info);
}

.page-about .stat-card__number {
  display: block;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 2.4rem;
  line-height: 1.1;
  color: var(--color-primary);
}

.page-about .stat-card__unit {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-info);
  margin-left: 4px;
}

.page-about .stat-card__label {
  display: block;
  margin-top: 8px;
  font-size: 0.95rem;
  color: var(--color-text);
}

.page-about .about-stats__note {
  margin-top: 24px;
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* 认证与荣誉 */
.page-about .about-honor {
  background: var(--color-surface);
}

.page-about .honor-grid {
  display: grid;
  gap: 20px;
}

.page-about .honor-card {
  border: 1px solid rgba(10, 37, 64, 0.08);
  border-radius: var(--about-radius-md);
  padding: 24px;
  background: linear-gradient(145deg, var(--color-surface) 0%, #f0f7ff 100%);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.page-about .honor-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-3px);
}

.page-about .honor-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  margin-bottom: 16px;
}

.page-about .honor-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.page-about .honor-card p {
  margin: 0;
  color: var(--color-text);
  line-height: 1.75;
  font-size: 0.95rem;
}

/* 技术团队 */
.page-about .about-team {
  background: linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
  color: #ffffff;
}

.page-about .about-team__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-team__content .section-eyebrow {
  color: #9adbe5;
}

.page-about .about-team__content h2 {
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1.32;
  margin-bottom: 16px;
}

.page-about .about-team__content p {
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.82;
  margin-bottom: 18px;
}

.page-about .about-team__list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: grid;
  gap: 10px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 22px;
  color: rgba(255, 255, 255, 0.92);
  line-height: 1.7;
  font-size: 0.95rem;
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-info);
}

.page-about .about-team__img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  display: block;
}

/* 延伸阅读 */
.page-about .about-more {
  background: var(--color-bg);
}

.page-about .more-grid {
  display: grid;
  gap: 14px;
}

.page-about .more-card {
  display: block;
  padding: 22px 24px;
  border-radius: var(--about-radius-md);
  background: var(--color-surface);
  border: 1px solid rgba(10, 37, 64, 0.08);
  text-decoration: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.page-about .more-card:hover {
  border-color: var(--color-info);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.page-about .more-card__kicker {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-info);
  margin-bottom: 6px;
}

.page-about .more-card__title {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.page-about .more-card__text {
  display: block;
  color: var(--color-text-light);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* 平板到桌面 */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .more-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .honor-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (min-width: 960px) {
  .page-about .section {
    padding: 84px 0;
  }

  .page-about .about-hero {
    padding: 56px 0 72px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 48px;
  }

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

  .page-about .about-map__item {
    padding: 14px 18px;
  }

  .page-about .about-story__grid,
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
    gap: 52px;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-about .about-team__content {
    order: 1;
  }

  .page-about .about-team__media {
    order: 2;
  }

  .page-about .about-timeline {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    gap: 28px;
  }

  .page-about .timeline-item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .about-journey__figure {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }

  .page-about .honor-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .about-heading {
    margin-bottom: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-map__item,
  .page-about .stat-card,
  .page-about .more-card,
  .page-about .honor-card,
  .page-about .timeline-item__num,
  .page-about .timeline-item__card {
    transition: none;
  }
}