.page-about{
  background: var(--c-off-white);
  color: var(--c-black);
  overflow-x: hidden;
  overflow-x: clip;
}
@keyframes pageAboutPulse{
  0%{ box-shadow: 0 0 0 0 rgba(198,255,0,.45); }
  70%{ box-shadow: 0 0 0 10px rgba(198,255,0,0); }
  100%{ box-shadow: 0 0 0 0 rgba(198,255,0,0); }
}

/* 动效渐进增强：JS 未执行时内容保持可见 */
.page-about [data-reveal]{
  transition: opacity .55s ease, transform .55s ease;
}
.js .page-about [data-reveal]:not(.is-visible){
  opacity: 0;
  transform: translateY(28px);
}
@media (prefers-reduced-motion: reduce){
  .page-about [data-reveal]{
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .page-about .pulse-dot{
    animation: none !important;
  }
}

/* 面包屑 */
.page-about .breadcrumb{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .02em;
}
.page-about .breadcrumb__item{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(245,247,250,.7);
}
.page-about .breadcrumb__item + .breadcrumb__item::before{
  content: "/";
  color: var(--c-gray);
}
.page-about .breadcrumb__link{
  color: rgba(245,247,250,.72);
  text-decoration: none;
}
.page-about .breadcrumb__link:hover{
  color: var(--c-neon);
}

/* 首屏封面 */
.page-about .about-hero{
  position: relative;
  padding: 44px 0 92px;
  background: linear-gradient(135deg, var(--c-navy) 0%, var(--c-navy-2) 100%);
  color: var(--c-off-white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 48px), 0 100%);
  overflow: hidden;
}
.page-about .about-hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: .42;
  pointer-events: none;
}
.page-about .about-hero::after{
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  right: -90px;
  top: -76px;
  border-radius: 50%;
  background: conic-gradient(from 200deg, var(--c-orange), transparent 68%);
  opacity: .36;
  pointer-events: none;
}
.page-about .about-hero__grid{
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}
.page-about .about-hero__kicker{
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-neon);
  margin-bottom: 16px;
}
.page-about .pulse-dot{
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-neon);
  animation: pageAboutPulse 2s infinite;
}
.page-about .about-hero__title{
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(36px, 7vw, 62px);
  line-height: 1.06;
  letter-spacing: -.01em;
  margin: 0 0 20px;
}
.page-about .about-hero__title::after{
  content: "";
  display: block;
  width: 64px;
  height: 6px;
  margin-top: 18px;
  background: var(--c-orange);
  clip-path: polygon(0 0, 100% 40%, 100% 100%, 0 60%);
}
.page-about .about-hero__lead{
  max-width: 56ch;
  margin: 0;
  font-size: 18px;
  line-height: 1.75;
  color: rgba(245,247,250,.84);
}
.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-hero .btn--ghost{
  border-color: rgba(255,255,255,.42);
  color: var(--c-off-white);
  background: transparent;
}
.page-about .about-hero .btn--ghost:hover{
  border-color: var(--c-neon);
  color: var(--c-neon);
}
.page-about .about-hero__index{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px 20px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.16);
}
.page-about .about-hero__index-item{
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  color: var(--c-off-white);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}
.page-about .about-hero__index-num{
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--c-neon);
}
.page-about .about-hero__index-item:hover .about-hero__index-num{
  color: var(--c-orange);
}
.page-about .about-hero__side{
  display: grid;
  gap: 14px;
}
.page-about .about-hero__stat{
  padding: 18px 20px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}
.page-about .about-hero__stat-value{
  display: block;
  font-family: var(--font-data);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-orange);
}
.page-about .about-hero__stat-value span{
  font-size: 20px;
  color: var(--c-neon);
}
.page-about .about-hero__stat-label{
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.66);
}

/* 品牌故事 */
.page-about .about-story{
  padding: 72px 0 80px;
  background: var(--c-off-white);
}
.page-about .about-story__grid{
  display: grid;
  gap: 44px;
  align-items: center;
}
.page-about .about-story__media{
  position: relative;
  padding: 16px 16px 0 0;
}
.page-about .about-story__media::before{
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 72%;
  height: 76%;
  background: linear-gradient(135deg, var(--c-navy), var(--c-navy-2));
  clip-path: polygon(0 0, 100% 0, 100% 100%, 18% 100%);
  opacity: .09;
  pointer-events: none;
}
.page-about .about-story__media::after{
  content: "";
  position: absolute;
  left: 0;
  bottom: 24px;
  width: 88px;
  height: 88px;
  border-left: 4px solid var(--c-orange);
  border-bottom: 4px solid var(--c-neon);
  pointer-events: none;
}
.page-about .about-story__media img{
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--c-navy);
  border: 1px solid var(--c-light-gray);
  box-shadow: 0 18px 40px rgba(10,31,68,.12);
}
.page-about .img-frame__label{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
  margin-top: 12px;
  font-size: 13px;
  color: var(--c-gray);
}
.page-about .img-frame__label::before{
  content: "";
  width: 18px;
  height: 2px;
  background: var(--c-orange);
}
.page-about .about-story__text{
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.85;
}
.page-about .about-story__facts{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--c-light-gray);
}
.page-about .about-story__fact-num{
  display: block;
  font-family: var(--font-data);
  font-size: 30px;
  font-weight: 700;
  color: var(--c-navy);
}
.page-about .about-story__fact-label{
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--c-gray);
}

/* 章节标题（页面内微调） */
.page-about .section-heading__eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-orange);
}
.page-about .section-heading__eyebrow::before{
  content: "";
  width: 24px;
  height: 2px;
  background: var(--c-neon);
}
.page-about .section-heading__title{
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.2;
  letter-spacing: -.01em;
  margin: 12px 0 14px;
}
.page-about .section-heading__desc{
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-gray);
}
.page-about .section-heading--center{
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.page-about .section-heading--center .section-heading__desc{
  margin-left: auto;
  margin-right: auto;
}

/* 里程碑时间线 */
.page-about .about-timeline{
  position: relative;
  padding: 88px 0 96px;
  background:
    linear-gradient(180deg, rgba(198,255,0,.04), transparent 22%),
    var(--c-dark);
  color: var(--c-off-white);
  overflow: hidden;
}
.page-about .about-timeline::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 44px;
  background: var(--c-off-white);
  clip-path: polygon(0 0, 100% 0, calc(100% - 88px) 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-timeline::after{
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 44px;
  background: var(--c-off-white);
  clip-path: polygon(88px 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-timeline .container{
  position: relative;
  z-index: 1;
}
.page-about .about-timeline .section-heading__title{
  color: var(--c-off-white);
}
.page-about .about-timeline .section-heading__desc{
  color: rgba(245,247,250,.68);
}
.page-about .about-timeline .section-heading__eyebrow{
  color: var(--c-neon);
}
.page-about .about-timeline__wrap{
  position: relative;
  max-width: 980px;
  margin: 56px auto 0;
}
.page-about .about-timeline__line{
  position: absolute;
  top: 24px;
  bottom: 24px;
  left: 27px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-neon) 0%, rgba(255,122,0,.9) 100%);
  transform: scaleX(.9);
  transform-origin: top;
}
.page-about .about-timeline__item{
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 36px;
}
.page-about .about-timeline__item:last-child{
  margin-bottom: 0;
}
.page-about .about-timeline__marker{
  grid-column: 1;
  grid-row: 1;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding-top: 10px;
}
.page-about .about-timeline__dot{
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-neon);
  box-shadow: 0 0 0 5px rgba(198,255,0,.15), 0 0 18px rgba(198,255,0,.4);
}
.page-about .about-timeline__year{
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .08em;
  white-space: nowrap;
  color: var(--c-neon);
  background: rgba(198,255,0,.08);
  border: 1px solid rgba(198,255,0,.3);
  padding: 4px 8px;
  border-radius: 2px;
}
.page-about .about-timeline__card{
  grid-column: 2;
  grid-row: 1;
  position: relative;
  padding: 20px 22px;
  background: rgba(10,31,68,.9);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 2px;
}
.page-about .about-timeline__card::before{
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 64px;
  height: 4px;
  background: var(--c-orange);
  clip-path: polygon(0 0, 100% 0, 80% 100%, 0 100%);
}
.page-about .about-timeline__card h3{
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  color: var(--c-off-white);
}
.page-about .about-timeline__card p{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245,247,250,.72);
}

/* 数据覆盖范围 */
.page-about .about-coverage{
  padding: 72px 0 80px;
  background: var(--c-off-white);
}
.page-about .about-coverage__grid{
  display: grid;
  gap: 44px;
  align-items: center;
  margin-top: 28px;
}
.page-about .about-coverage__media{
  position: relative;
  padding: 8px;
  background: var(--c-navy);
}
.page-about .about-coverage__media::before{
  content: "";
  position: absolute;
  right: -14px;
  bottom: -14px;
  width: 120px;
  height: 120px;
  background: var(--c-neon);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: .5;
  z-index: 0;
  pointer-events: none;
}
.page-about .about-coverage__media img{
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--c-navy);
}
.page-about .about-coverage__lead{
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
}
.page-about .about-coverage__list{
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-coverage__item{
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: #fff;
  border: 1px solid var(--c-light-gray);
  border-bottom: 3px solid var(--c-orange);
  box-shadow: 0 4px 12px rgba(10,31,68,.04);
}
.page-about .about-coverage__tag{
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1;
  white-space: nowrap;
  color: var(--c-navy);
  background: rgba(198,255,0,.18);
  border: 1px solid rgba(198,255,0,.65);
  padding: 6px 8px;
  border-radius: 2px;
}
.page-about .about-coverage__item strong{
  display: block;
  font-size: 15px;
  color: var(--c-navy);
}
.page-about .about-coverage__item div span{
  display: block;
  margin-top: 2px;
  font-size: 13px;
  color: var(--c-gray);
}
.page-about .about-coverage__chips{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.page-about .about-coverage__chip{
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--c-navy);
  background: #fff;
  border: 1px solid var(--c-light-gray);
  border-left: 3px solid var(--c-neon);
  padding: 8px 10px;
  border-radius: 2px;
}
.page-about .about-coverage__metrics{
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}
.page-about .metric{
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 18px;
  background: var(--c-navy);
  color: var(--c-off-white);
}
.page-about .metric__value{
  font-family: var(--font-data);
  font-size: 26px;
  font-weight: 700;
  color: var(--c-neon);
}
.page-about .metric__label{
  font-size: 13px;
  color: rgba(245,247,250,.72);
}

/* 团队与技术 */
.page-about .about-team{
  position: relative;
  padding: 72px 0 84px;
  background: var(--c-off-white);
  border-top: 1px solid var(--c-light-gray);
}
.page-about .about-team__grid{
  display: grid;
  gap: 44px;
  align-items: center;
  margin-top: 32px;
}
.page-about .about-team__media{
  position: relative;
}
.page-about .about-team__media::after{
  content: "";
  position: absolute;
  top: -10px;
  left: -10px;
  width: 64px;
  height: 64px;
  border-top: 4px solid var(--c-neon);
  border-left: 4px solid var(--c-orange);
  z-index: 2;
  pointer-events: none;
}
.page-about .about-team__frame{
  padding: 8px;
  background: var(--c-navy);
}
.page-about .about-team__frame img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--c-navy);
}
.page-about .about-team__lead{
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
}
.page-about .about-team__points{
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-team__points li{
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  line-height: 1.72;
}
.page-about .about-team__point-dot{
  flex: 0 0 8px;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 2px;
  background: var(--c-orange);
  transform: rotate(45deg);
}
.page-about .about-team__cta{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* 延伸入口 */
.page-about .about-coda{
  position: relative;
  padding: 72px 0 88px;
  background: var(--gradient-flow);
  color: var(--c-off-white);
  overflow: hidden;
}
.page-about .about-coda::before{
  content: "";
  position: absolute;
  right: -52px;
  bottom: -68px;
  width: 230px;
  height: 230px;
  border-radius: 50%;
  border: 36px solid rgba(255,122,0,.46);
  pointer-events: none;
}
.page-about .about-coda::after{
  content: "";
  position: absolute;
  left: -48px;
  top: -76px;
  width: 224px;
  height: 224px;
  border: 2px dashed rgba(198,255,0,.22);
  border-radius: 50%;
  pointer-events: none;
}
.page-about .about-coda__inner{
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  align-items: end;
}
.page-about .about-coda__text h2{
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  letter-spacing: -.01em;
}
.page-about .about-coda__text p{
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(245,247,250,.76);
}
.page-about .about-coda__links{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-coda .btn--light{
  background: var(--c-off-white);
  border: 1px solid var(--c-off-white);
  color: var(--c-navy);
}
.page-about .about-coda .btn--light:hover{
  background: var(--c-neon);
  border-color: var(--c-neon);
  color: var(--c-navy);
}

/* ===== 响应式 ===== */
@media (min-width: 480px){
  .page-about .about-hero__side{
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-hero__index{
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-coverage__list{
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px){
  .page-about .about-timeline__line{
    left: 50%;
    transform: translateX(-50%) scaleX(.9);
  }
  .page-about .about-timeline__item{
    grid-template-columns: 1fr 64px 1fr;
    gap: 24px;
    margin-bottom: 44px;
  }
  .page-about .about-timeline__marker{
    grid-column: 2;
    grid-row: 1;
    flex-direction: column;
    gap: 8px;
    padding-top: 22px;
  }
  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card{
    grid-column: 1;
    grid-row: 1;
  }
  .page-about .about-timeline__item:nth-child(even) .about-timeline__card{
    grid-column: 3;
    grid-row: 1;
  }
}

@media (min-width: 960px){
  .page-about .about-hero__grid{
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 64px;
    align-items: end;
  }
  .page-about .about-hero__side{
    grid-template-columns: 1fr;
    padding-bottom: 6px;
  }
  .page-about .about-story,
  .page-about .about-team{
    padding: 96px 0;
  }
  .page-about .about-story__grid{
    grid-template-columns: 5fr 6fr;
    gap: 72px;
  }
  .page-about .about-coverage,
  .page-about .about-timeline{
    padding: 104px 0;
  }
  .page-about .about-coverage__grid{
    grid-template-columns: 5fr 6fr;
    gap: 72px;
  }
  .page-about .about-team__grid{
    grid-template-columns: 5fr 6fr;
    gap: 72px;
  }
  .page-about .about-team__content{
    grid-column: 1;
    grid-row: 1;
  }
  .page-about .about-team__media{
    grid-column: 2;
    grid-row: 1;
  }
  .page-about .about-coda__inner{
    grid-template-columns: 1fr auto;
  }
}