.page-about{
  --about-hair: rgba(6,19,32,.13);
  --about-hair-dark: rgba(246,243,236,.16);
  --about-body: rgba(6,19,32,.78);
  --about-body-dark: rgba(246,243,236,.74);
}

/* ---------- 通用色带 ---------- */
.page-about .about-band{
  padding-block: 64px;
}
.page-about .about-band--paper{
  background: var(--paper-100);
  color: var(--ink-900);
}
.page-about .about-band--paper2{
  background: var(--paper-200);
  color: var(--ink-900);
}
.page-about .about-band--ink{
  background: var(--ink-900);
  color: var(--paper-100);
}
@media (min-width: 900px){
  .page-about .about-band{ padding-block: 100px; }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--paper-100);
  padding-block: 40px 56px;
}
.page-about .about-hero::before{
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(246,243,236,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(246,243,236,.055) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}
.page-about .about-hero .wrap{
  position: relative;
  z-index: 1;
}
@media (min-width: 900px){
  .page-about .about-hero{ padding-block: 64px 88px; }
}

.page-about .about-hero .breadcrumb{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(246,243,236,.55);
}
.page-about .about-hero .breadcrumb a{
  color: rgba(246,243,236,.85);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease);
}
.page-about .about-hero .breadcrumb a:hover{
  border-bottom-color: var(--orange-500);
}

.page-about .about-hero__eyebrow{
  margin-top: 30px;
  color: var(--celadon-400);
  letter-spacing: .14em;
}

.page-about .about-hero__title{
  margin: 14px 0 0;
  font-size: clamp(46px, 11vw, 126px);
  line-height: .9;
  letter-spacing: -.04em;
  font-weight: 800;
  color: var(--paper-100);
}
.page-about .about-hero__title-alt{
  color: var(--orange-500);
}

.page-about .about-hero__lead{
  margin: 28px 0 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.72;
  color: var(--about-body-dark);
}
@media (min-width: 900px){
  .page-about .about-hero__lead{ font-size: 18px; }
}

.page-about .about-hero__stats{
  margin: 40px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair-dark);
  border-top: 1px solid var(--about-hair-dark);
  border-bottom: 1px solid var(--about-hair-dark);
}
@media (min-width: 720px){
  .page-about .about-hero__stats{ grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.page-about .about-hero__stat{
  background: var(--ink-900);
  padding: 16px 14px 18px;
}
.page-about .about-hero__stat dt{
  font-size: 12px;
  letter-spacing: .1em;
  color: rgba(246,243,236,.55);
}
.page-about .about-hero__stat dd{
  margin: 8px 0 0;
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--paper-100);
  font-variant-numeric: tabular-nums;
}

/* ---------- 章节抬头 ---------- */
.page-about .about-head{
  max-width: 760px;
}
.page-about .about-head .label{
  color: var(--gray-500);
  letter-spacing: .14em;
}
.page-about .about-head .h2{
  margin: 14px 0 0;
  letter-spacing: -.02em;
  line-height: 1.12;
}
.page-about .about-head__note{
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.72;
  color: var(--about-body);
}
.page-about .about-band--ink .about-head .label{
  color: var(--celadon-400);
}
.page-about .about-band--ink .about-head .h2{
  color: var(--paper-100);
}
.page-about .about-band--ink .about-head__note{
  color: var(--about-body-dark);
}

/* ---------- 历程：年份轨道 ---------- */
.page-about .about-timeline{
  margin-top: 36px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}
.page-about .about-rail__list{
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.page-about .about-rail__list::-webkit-scrollbar{ display: none; }
.page-about .about-rail__link{
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--about-hair);
  color: var(--ink-900);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible{
  border-color: var(--orange-700);
  background: var(--paper-200);
}
.page-about .about-rail__year{
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--orange-700);
  font-variant-numeric: tabular-nums;
}
.page-about .about-rail__txt{
  color: var(--gray-500);
  transition: color .2s var(--ease);
}

@media (min-width: 900px){
  .page-about .about-timeline{
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 64px;
    margin-top: 56px;
    align-items: start;
  }
  .page-about .about-rail{
    position: sticky;
    top: 40px;
    align-self: start;
  }
  .page-about .about-rail__list{
    flex-direction: column;
    gap: 0;
    padding: 0;
    overflow: visible;
    border-left: 1px solid var(--about-hair);
  }
  .page-about .about-rail__link{
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding: 12px 0 12px 22px;
    border: 0;
    background: transparent;
    position: relative;
  }
  .page-about .about-rail__link::before{
    content: "";
    position: absolute;
    left: -4px;
    top: 50%;
    width: 7px;
    height: 7px;
    margin-top: -3.5px;
    background: var(--paper-100);
    border: 1px solid var(--about-hair);
    transition: background .2s var(--ease), border-color .2s var(--ease);
  }
  .page-about .about-rail__link:hover::before,
  .page-about .about-rail__link:focus-visible::before{
    background: var(--orange-500);
    border-color: var(--orange-500);
  }
  .page-about .about-rail__link:hover .about-rail__txt,
  .page-about .about-rail__link:focus-visible .about-rail__txt{
    color: var(--ink-900);
  }
  .page-about .about-rail__year{ font-size: 22px; }
  .page-about .about-rail__txt{ font-size: 13px; }
}

.page-about .about-stages{
  display: grid;
  gap: 0;
}
.page-about .about-stage{
  padding: 0 0 34px;
  border-bottom: 1px solid var(--about-hair);
  scroll-margin-top: 84px;
}
.page-about .about-stage + .about-stage{
  padding-top: 34px;
}
.page-about .about-stage:last-child{
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-stage__year{
  display: inline-block;
  margin: 0 0 14px;
  padding: 5px 12px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .1em;
  color: var(--orange-700);
  border: 1px solid rgba(194,65,12,.32);
  font-variant-numeric: tabular-nums;
}
.page-about .about-stage .h3{
  margin: 0 0 12px;
  letter-spacing: -.015em;
}
.page-about .about-stage p{
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--about-body);
}
.page-about .about-stage .about-stage__year{
  max-width: none;
  font-size: 13px;
  line-height: 1.4;
  color: var(--orange-700);
}

/* ---------- 队伍 ---------- */
.page-about .about-crews__grid{
  margin-top: 40px;
  display: grid;
  gap: 36px;
}
@media (min-width: 980px){
  .page-about .about-crews__grid{
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 64px;
    align-items: start;
  }
}
.page-about .about-crews__list{
  display: grid;
  gap: 0;
}
.page-about .about-crew{
  padding: 20px 0;
  border-top: 1px solid var(--about-hair-dark);
}
.page-about .about-crew:first-child{
  border-top: 0;
  padding-top: 0;
}
.page-about .about-crew__head{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
}
.page-about .about-crew__name{
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper-100);
}
.page-about .about-crew__num{
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--celadon-400);
  font-variant-numeric: tabular-nums;
}
.page-about .about-crew__desc{
  margin: 8px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--about-body-dark);
}

/* ---------- 图片 ---------- */
.page-about .about-fig{ margin: 0; }
.page-about .about-fig__frame{
  overflow: hidden;
  background: var(--ink-700);
}
.page-about .about-fig__frame img{
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-crews__fig .about-fig__frame{ aspect-ratio: 1200 / 900; }
.page-about .about-cert__fig .about-fig__frame{ aspect-ratio: 1200 / 800; }
.page-about .about-super__fig .about-fig__frame{ aspect-ratio: 1 / 1; }
.page-about .about-fig__cap{
  margin: 12px 0 0;
  max-width: 46ch;
  font-size: 13px;
  line-height: 1.62;
  color: var(--gray-500);
}
.page-about .about-band--ink .about-fig__cap{
  color: rgba(246,243,236,.55);
}

/* ---------- 一单流程 ---------- */
.page-about .about-flow{
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--about-hair-dark);
  border-top: 1px solid var(--about-hair-dark);
  border-bottom: 1px solid var(--about-hair-dark);
}
@media (min-width: 760px){
  .page-about .about-flow{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.page-about .about-flow__item{
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 16px 14px 18px;
  background: var(--ink-900);
}
.page-about .about-flow__n{
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--orange-500);
  padding-top: 3px;
}
.page-about .about-flow__txt strong{
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  color: var(--paper-100);
}
.page-about .about-flow__txt p{
  margin: 0;
  font-size: 14px;
  line-height: 1.66;
  color: var(--about-body-dark);
}

/* ---------- 认证四步 ---------- */
.page-about .about-cert__grid{
  margin-top: 40px;
  display: grid;
  gap: 40px;
}
@media (min-width: 980px){
  .page-about .about-cert__grid{
    grid-template-columns: minmax(0, 1fr) minmax(0, .85fr);
    gap: 64px;
    align-items: start;
  }
}
.page-about .about-step{
  border-top: 1px solid var(--about-hair);
}
.page-about .about-step:last-of-type{
  border-bottom: 1px solid var(--about-hair);
}
.page-about .about-step__title{
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 24px;
  align-items: center;
  gap: 10px;
  padding: 18px 0;
  cursor: pointer;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink-900);
  list-style: none;
}
.page-about .about-step__title::-webkit-details-marker{ display: none; }
.page-about .about-step__title::after{
  content: "+";
  font-size: 22px;
  line-height: 1;
  text-align: center;
  color: var(--orange-700);
  transition: transform .2s var(--ease);
}
.page-about .about-step[open] > .about-step__title::after{
  transform: rotate(45deg);
}
.page-about .about-step__n{
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--gray-500);
  font-variant-numeric: tabular-nums;
}
.page-about .about-step[open] > .about-step__title .about-step__n{
  color: var(--orange-700);
}
.page-about .about-step__body{
  padding: 0 0 20px;
}
@media (min-width: 900px){
  .page-about .about-step__body{ padding-left: 46px; }
}
.page-about .about-step__body p{
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--about-body);
}

.page-about .about-promo{
  margin-top: 44px;
  padding: 24px 20px 26px;
  background: var(--paper-200);
  border-left: 4px solid var(--orange-500);
}
.page-about .about-promo .h3{
  margin: 0 0 10px;
  font-size: clamp(19px, 2vw, 23px);
  letter-spacing: -.01em;
}
.page-about .about-promo p{
  margin: 0;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- 督导 ---------- */
.page-about .about-super__grid{
  display: grid;
  gap: 36px;
}
@media (min-width: 900px){
  .page-about .about-super__grid{
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 64px;
    align-items: center;
  }
}
.page-about .about-super__main .h2{
  margin: 14px 0 0;
  letter-spacing: -.02em;
  line-height: 1.12;
}
.page-about .about-super__main .label{
  color: var(--gray-500);
  letter-spacing: .14em;
}
.page-about .about-super__points{
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}
.page-about .about-super__points li{
  padding: 14px 0;
  border-top: 1px solid var(--about-hair);
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-body);
}
.page-about .about-super__points li:first-child{
  border-top: 0;
  padding-top: 0;
}
.page-about .about-super__points strong{
  color: var(--ink-900);
  font-weight: 700;
}

/* ---------- 能力与合作 ---------- */
.page-about .about-net__grid{
  margin-top: 36px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}
@media (min-width: 700px){
  .page-about .about-net__grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1080px){
  .page-about .about-net__grid{ grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.page-about .about-net__item{
  background: var(--paper-100);
  padding: 24px 20px 26px;
}
.page-about .about-net__num{
  margin: 0;
  font-size: clamp(28px, 3.6vw, 38px);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.1;
  color: var(--ink-900);
  font-variant-numeric: tabular-nums;
}
.page-about .about-net__num small{
  margin-left: 4px;
  font-size: .45em;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--gray-500);
}
.page-about .about-net__label{
  margin: 8px 0 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--orange-700);
}
.page-about .about-net__desc{
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-body);
}
.page-about .about-net__note{
  margin: 32px 0 0;
  max-width: 76ch;
  padding-left: 18px;
  border-left: 3px solid var(--celadon-700);
  font-size: 15px;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- 接下来 ---------- */
.page-about .about-next__list{
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}
@media (min-width: 820px){
  .page-about .about-next__list{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 48px;
  }
}
.page-about .about-next__item{
  padding: 20px 0 22px;
  border-top: 1px solid var(--about-hair-dark);
}
.page-about .about-next__n{
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--orange-500);
  font-variant-numeric: tabular-nums;
}
.page-about .about-next__item .h3{
  margin: 0 0 8px;
  font-size: clamp(18px, 1.9vw, 22px);
  letter-spacing: -.01em;
  color: var(--paper-100);
}
.page-about .about-next__item p{
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--about-body-dark);
}

.page-about .about-cta{
  margin-top: 44px;
  padding-top: 32px;
  border-top: 1px solid var(--about-hair-dark);
  display: grid;
  gap: 20px;
}
@media (min-width: 820px){
  .page-about .about-cta{
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}
.page-about .about-cta__text{
  margin: 0;
  max-width: 56ch;
  font-size: 17px;
  line-height: 1.72;
  color: var(--about-body-dark);
}
.page-about .about-cta__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta__actions .btn{
  text-decoration: none;
}
.page-about .about-band--ink .about-cta__actions .btn--ghost{
  color: var(--paper-100);
  border-color: var(--about-hair-dark);
}
.page-about .about-band--ink .about-cta__actions .btn--ghost:hover,
.page-about .about-band--ink .about-cta__actions .btn--ghost:focus-visible{
  color: var(--ink-900);
  background: var(--paper-100);
  border-color: var(--paper-100);
}
.page-about .about-cta__more{
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(246,243,236,.6);
}
.page-about .about-cta__more a{
  color: var(--celadon-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(87,196,168,.42);
  transition: border-color .2s var(--ease);
}
.page-about .about-cta__more a:hover{
  border-bottom-color: var(--celadon-400);
}
<<<END>>>