.page-about{
  --about-num-large: clamp(3rem, 6vw, 5.5rem);
  --about-num-medium: clamp(2.2rem, 4vw, 3.4rem);
  --about-card-radius: 24px;
  --about-dark-block: #101828;
  --about-deep-block: #1E3A8A;
  position: relative;
  background: var(--cream-bg);
  color: var(--ink-blue);
  font-family: 'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  line-height: 1.75;
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb-wrap{
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding-top: 1.5rem;
  padding-bottom: 0.5rem;
}
.page-about .breadcrumb{
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  font-size: 0.85rem;
}
.page-about .breadcrumb__link{
  color: var(--accent-orange);
  text-decoration: none;
  font-weight: 500;
}
.page-about .breadcrumb__link:hover{
  color: var(--ink-blue);
}
.page-about .breadcrumb__sep{
  color: var(--line-grey);
}
.page-about .breadcrumb__current{
  color: var(--text-secondary);
  font-weight: 500;
}
.page-about .page-context{
  font-family: 'Noto Serif SC','Source Han Serif SC',serif;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
  letter-spacing: 0.04em;
}

/* 首屏 */
.page-about .about-hero{
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-top: 1.5rem;
  padding-bottom: 3.5rem;
  position: relative;
}
.page-about .about-hero::after{
  content: "";
  display: block;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--accent-orange) 0%, var(--amber-accent) 60%, var(--line-grey) 100%);
  border-radius: var(--radius-pill);
  margin-top: 1.5rem;
}
.page-about .about-hero__inner{
  max-width: 760px;
}
.page-about .about-hero__kicker{
  font-family: 'DIN Condensed','Arial Narrow',sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-orange);
  margin: 0 0 0.75rem;
}
.page-about .about-hero h1{
  font-family: 'DIN Condensed','Arial Narrow',sans-serif;
  font-size: clamp(2.1rem, 4.2vw, 3.6rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
  font-weight: 700;
  margin: 0 0 1.2rem;
  max-width: 760px;
}
.page-about .about-hero__lead{
  font-family: 'Noto Serif SC','Source Han Serif SC',serif;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 0 1.5rem;
}
.page-about .about-hero__meta{
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.page-about .about-hero__visual{
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: linear-gradient(135deg, var(--ink-blue) 0%, var(--deep-blue) 100%);
  padding: 1.8rem 2rem;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.page-about .about-hero__visual::before{
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(240,78,35,0.35) 0%, transparent 70%);
  border-radius: 50%;
}
.page-about .about-hero__date{
  font-family: 'DIN Condensed','Arial Narrow',sans-serif;
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.03em;
  line-height: 1.1;
  white-space: nowrap;
}
.page-about .about-hero__icon{
  flex-shrink: 0;
  width: 100px;
  height: 100px;
}

/* 时间轴 */
.page-about .timeline-section{
  padding: 2rem 0 4rem;
}
.page-about .timeline-archive{
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 2rem;
  background: var(--cream-light);
  box-shadow: 0 2px 0 var(--line-grey);
}
.page-about .timeline-archive__bg{
  position: absolute;
  inset: 0;
  opacity: 0.5;
}
.page-about .timeline-archive__bg img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-about .timeline-list{
  position: relative;
  list-style: none;
  margin: 0;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.page-about .timeline-item{
  display: grid;
  grid-template-columns: 5rem 1fr;
  gap: 1.2rem;
  align-items: start;
  position: relative;
}
.page-about .timeline-item::before{
  content: "";
  position: absolute;
  left: 2.4rem;
  top: 3.2rem;
  bottom: -2rem;
  width: 3px;
  background: repeating-linear-gradient(180deg, var(--line-grey) 0 8px, transparent 8px 16px);
}
.page-about .timeline-item:last-child::before{
  display: none;
}
.page-about .timeline-item__year{
  font-family: 'DIN Condensed','Arial Narrow',sans-serif;
  font-weight: 700;
  font-size: var(--about-num-medium);
  line-height: 1;
  color: var(--ink-blue);
  padding: 0.4rem 0 0;
  position: relative;
  z-index: 1;
}
.page-about .timeline-item__year::before{
  content: "";
  display: inline-block;
  width: 2.4rem;
  height: 6px;
  background: var(--accent-orange);
  border-radius: var(--radius-pill);
  margin-right: 0.5rem;
  vertical-align: middle;
}
.page-about .timeline-item__card{
  background: var(--cream-light);
  border-radius: var(--about-card-radius);
  padding: 1.4rem 1.6rem;
  box-shadow: 0 2px 0 var(--line-grey);
  position: relative;
  z-index: 1;
}
.page-about .timeline-item__card h3{
  font-family: 'DIN Condensed','Arial Narrow',sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0.6rem 0 0.5rem;
}
.page-about .timeline-item__card p{
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
}

/* 焕新版诞生记 */
.page-about .upgrade-section{
  padding: 2rem 0 4rem;
}
.page-about .upgrade-section__intro{
  padding-right: 2rem;
}
.page-about .upgrade-card{
  background: var(--cream-light);
  border-radius: var(--about-card-radius);
  padding: 1.6rem 1.8rem;
  margin-bottom: 1.2rem;
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 0 1.2rem;
  box-shadow: 0 2px 0 var(--line-grey);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .upgrade-card:hover{
  transform: translateY(-3px);
  box-shadow: 0 6px 0 var(--line-grey);
}
.page-about .upgrade-card__num{
  grid-row: span 2;
  font-family: 'DIN Condensed','Arial Narrow',sans-serif;
  font-size: var(--about-num-medium);
  font-weight: 700;
  color: var(--accent-orange);
  line-height: 1.1;
}
.page-about .upgrade-card h3{
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
}
.page-about .upgrade-card p{
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
}
.page-about .upgrade-diagram{
  margin-top: 2.5rem;
  background: var(--ink-blue);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.page-about .upgrade-diagram__frame{
  border-radius: calc(var(--about-card-radius) - 8px);
  overflow: hidden;
}
.page-about .upgrade-diagram__frame img{
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.page-about .upgrade-diagram__caption{
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  justify-content: center;
  color: #FFFFFF;
}
.page-about .upgrade-diagram__caption p{
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  opacity: 0.85;
  max-width: 34rem;
}

/* 数据回溯 */
.page-about .archive-section{
  padding: 2rem 0 4rem;
}
.page-about .archive-metrics{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}
.page-about .archive-metric{
  background: var(--ink-blue);
  border-radius: var(--about-card-radius);
  padding: 1.6rem 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  position: relative;
  overflow: hidden;
}
.page-about .archive-metric::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: var(--accent-orange);
}
.page-about .archive-metric__num{
  font-family: 'DIN Condensed','Arial Narrow',sans-serif;
  font-size: var(--about-num-medium);
  font-weight: 700;
  color: #FFFFFF;
  line-height: 1.2;
}
.page-about .archive-metric__label{
  color: rgba(255,255,255,0.7);
  font-size: 0.85rem;
}
.page-about .archive-detail{
  gap: 1.5rem 0;
}
.page-about .data-card{
  height: 100%;
  background: var(--cream-light);
  border-radius: var(--about-card-radius);
  padding: 1.8rem;
  box-shadow: 0 2px 0 var(--line-grey);
}
.page-about .data-card__title{
  font-family: 'DIN Condensed','Arial Narrow',sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0 0 0.8rem;
}
.page-about .data-card__text{
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 0 0 1.2rem;
}
.page-about .btn--mt{
  margin-top: 0.4rem;
}
.page-about .btn--dark{
  display: inline-block;
  background: var(--ink-blue);
  color: #FFFFFF;
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}
.page-about .btn--dark:hover{
  background: var(--accent-orange);
  transform: translateY(-2px);
}

/* 团队 */
.page-about .team-section{
  padding: 2rem 0 4rem;
  background: var(--cream-light);
}
.page-about .team-section__text{
  padding-right: 2rem;
}
.page-about .team-section__img{
  width: 100%;
  height: auto;
  border-radius: var(--about-card-radius);
  margin-top: 1.8rem;
  object-fit: cover;
  box-shadow: 0 2px 0 var(--line-grey);
}
.page-about .team-list{
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.page-about .team-item{
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1.2rem;
  align-items: start;
  background: var(--cream-bg);
  border-radius: var(--about-card-radius);
  padding: 1.5rem 1.6rem;
  box-shadow: 0 2px 0 var(--line-grey);
  transition: transform 0.2s ease;
}
.page-about .team-item:hover{
  transform: translateX(4px);
}
.page-about .team-item__num{
  font-family: 'DIN Condensed','Arial Narrow',sans-serif;
  font-size: var(--about-num-large);
  font-weight: 700;
  color: var(--accent-orange);
  line-height: 1;
}
.page-about .team-item__body h3{
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
}
.page-about .team-item__body p{
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
  margin: 0;
}

/* 合规 */
.page-about .compliance-section{
  padding: 2rem 0 4rem;
}
.page-about .compliance-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  margin: 2rem 0;
}
.page-about .compliance-card{
  background: var(--cream-light);
  border-radius: var(--about-card-radius);
  padding: 1.8rem;
  box-shadow: 0 2px 0 var(--line-grey);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: background 0.2s ease;
}
.page-about .compliance-card:hover{
  background: #FFFFFF;
}
.page-about .compliance-card__icon{
  width: 48px;
  height: 48px;
  margin-bottom: 0.4rem;
}
.page-about .compliance-card h3{
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0;
}
.page-about .compliance-card p{
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
}
.page-about .compliance-note{
  background: linear-gradient(90deg, rgba(240,78,35,0.12) 0%, rgba(245,158,11,0.12) 100%);
  border-radius: var(--about-card-radius);
  padding: 1.4rem 1.8rem;
}
.page-about .compliance-note p{
  margin: 0;
  font-size: 0.95rem;
}
.page-about .compliance-note a{
  color: var(--accent-orange);
  font-weight: 600;
  text-decoration: none;
}
.page-about .compliance-note a:hover{
  text-decoration: underline;
}

/* 显现动效 */
.page-about [data-reveal]{
  transition: opacity 0.5s ease, transform 0.5s ease;
}

/* 响应式 */
@media (min-width: 768px){
  .page-about .about-hero{
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }
  .page-about .timeline-list{
    padding: 3rem;
    gap: 2.5rem;
  }
  .page-about .timeline-item{
    grid-template-columns: 7rem 1fr;
    gap: 1.8rem;
  }
  .page-about .upgrade-diagram{
    grid-template-columns: 1.3fr 1fr;
    align-items: center;
    padding: 2rem;
  }
  .page-about .archive-metrics{
    grid-template-columns: repeat(4, 1fr);
    gap: 1.2rem;
  }
  .page-about .archive-metric{
    padding: 2rem 1.6rem;
  }
  .page-about .archive-detail{
    gap: 1.5rem;
  }
  .page-about .compliance-grid{
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .page-about .compliance-card{
    padding: 2rem;
  }
  .page-about .grid{
    column-gap: 2rem;
  }
}

@media (max-width: 767px){
  .page-about .about-hero__visual{
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
  }
  .page-about .about-hero__date{
    font-size: 2.6rem;
  }
  .page-about .about-hero__icon{
    width: 72px;
    height: 72px;
  }
  .page-about .grid > [class*="col-span-"]{
    width: 100%;
  }
  .page-about .upgrade-section__intro,
  .page-about .team-section__text{
    padding-right: 0;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about *,
  .page-about *::before,
  .page-about *::after{
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .page-about [data-reveal]{
    opacity: 1 !important;
    transform: none !important;
  }
}