.page-about{
  background: var(--turf);
  color: var(--white);
  overflow-x: clip;
}

.page-about img{
  max-width: 100%;
  height: auto;
}

.page-about [id]{
  scroll-margin-top: calc(var(--header-h) + 18px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  overflow: hidden;
  background: var(--turf);
  padding: calc(var(--header-h) + clamp(38px, 9vw, 92px)) 0 clamp(40px, 7vw, 88px);
}

.page-about .about-hero__bg{
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__bg img{
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: .4;
}

.page-about .about-hero__bg::after{
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(2,10,8,.88) 0%, rgba(7,28,23,.62) 44%, var(--turf) 100%),
    repeating-linear-gradient(90deg, rgba(169,195,206,.10) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(169,195,206,.10) 0 1px, transparent 1px 64px);
}

.page-about .about-hero__inner{
  position: relative;
  z-index: 1;
}

.page-about .about-kicker{
  margin: clamp(18px, 3vw, 30px) 0 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-about .about-hero__title{
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 10.4vw, 6.2rem);
  line-height: .93;
  letter-spacing: -.012em;
  text-wrap: balance;
}

.page-about .about-hero__title span{
  display: block;
  color: var(--yellow);
}

.page-about .about-hero__lede{
  margin: clamp(18px, 3vw, 26px) 0 0;
  max-width: 52ch;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.8;
  color: rgba(243,247,242,.84);
}

.page-about .about-marks{
  display: grid;
  gap: 14px;
  margin-top: clamp(28px, 5vw, 54px);
}

.page-about .about-mark{
  border-top: 2px solid var(--line);
  padding-top: 12px;
}

.page-about .about-mark__key{
  display: block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .2em;
  color: var(--data);
  margin-bottom: 6px;
}

.page-about .about-mark__value{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: .02em;
}

/* ---------- 页内目录 ---------- */
.page-about .about-index{
  background: var(--field);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-index__list{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: clamp(16px, 3vw, 22px) 0;
  list-style: none;
}

.page-about .about-index__link{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  color: var(--white);
  text-decoration: none;
  font-size: .85rem;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}

.page-about .about-index__link span{
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--teal);
}

.page-about .about-index__link:hover{
  background: var(--teal-soft);
  border-color: var(--teal);
  color: var(--teal);
}

.page-about .about-index__link:focus-visible{
  outline: 2px solid var(--yellow);
  outline-offset: 2px;
  background: var(--yellow-soft);
  border-color: var(--yellow);
}

/* ---------- 通用分区 ---------- */
.page-about .about-sec{
  padding-block: clamp(52px, 8vw, 100px);
}

.page-about .about-sec--field{
  background: var(--field);
}

.page-about .about-split{
  display: grid;
  gap: clamp(22px, 4vw, 52px);
}

.page-about .about-rail{
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-rail__coord{
  display: block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  color: var(--yellow);
}

.page-about .about-rail__title{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 4.6vw, 2.4rem);
  line-height: 1.04;
}

.page-about .about-head{
  max-width: 62ch;
}

.page-about .about-head__title{
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 4.8vw, 2.9rem);
  line-height: 1.06;
}

.page-about .about-head__lede{
  margin: 14px 0 0;
  font-size: .98rem;
  line-height: 1.8;
  color: rgba(243,247,242,.78);
}

.page-about .about-body p{
  margin: 0 0 1.1em;
  max-width: 64ch;
  font-size: .98rem;
  line-height: 1.82;
  color: rgba(243,247,242,.84);
}

/* ---------- 方法三步 ---------- */
.page-about .about-steps{
  list-style: none;
  margin: clamp(24px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-step{
  padding: 18px 18px 20px;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--teal);
  background: rgba(28,75,61,.5);
}

.page-about .about-step__n{
  display: block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .2em;
  color: var(--teal);
}

.page-about .about-step__title{
  margin: 6px 0 8px;
  font-size: 1.02rem;
  font-weight: 700;
}

.page-about .about-step__text{
  margin: 0;
  font-size: .9rem;
  line-height: 1.72;
  color: rgba(243,247,242,.76);
}

/* ---------- 三条产品线 ---------- */
.page-about .about-lines{
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-line{
  position: relative;
  padding: 26px 22px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, rgba(28,75,61,.92), rgba(14,48,40,.92));
  transition: transform .25s ease, border-color .25s ease;
}

.page-about .about-line::before{
  content: "";
  position: absolute;
  left: 22px;
  top: 0;
  width: 46px;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: var(--teal);
}

.page-about .about-line--red::before{ background: var(--red); }
.page-about .about-line--yellow::before{ background: var(--yellow); }

.page-about .about-line:hover{
  transform: translateY(-4px);
  border-color: var(--teal);
}

.page-about .about-line__title{
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  letter-spacing: .02em;
}

.page-about .about-line__text{
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: rgba(243,247,242,.82);
}

.page-about .about-line__meta{
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--data);
}

.page-about .about-lines__note{
  margin: clamp(22px, 4vw, 32px) 0 0;
  max-width: 70ch;
  padding-left: 16px;
  border-left: 2px solid var(--yellow);
  font-size: .94rem;
  line-height: 1.8;
  color: rgba(243,247,242,.8);
}

/* ---------- 团队 ---------- */
.page-about .about-team{
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-team__item{
  padding: 18px 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(2,10,8,.3);
  transition: background .25s ease, border-color .25s ease;
}

.page-about .about-team__item:hover,
.page-about .about-team__item:focus-within{
  background: var(--teal-soft);
  border-color: var(--teal);
}

.page-about .about-team__item:focus-visible{
  outline: 2px solid var(--yellow);
  outline-offset: 2px;
}

.page-about .about-team__code{
  display: block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .2em;
  color: var(--data);
}

.page-about .about-team__name{
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.34rem;
}

.page-about .about-team__desc{
  margin: 0;
  font-size: .88rem;
  line-height: 1.7;
  color: rgba(243,247,242,.76);
}

.page-about .about-team__more{
  margin: 0;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  font-size: .8rem;
  line-height: 1.66;
  color: var(--teal);
  transition: max-height .3s ease, opacity .25s ease, margin-top .3s ease;
}

.page-about .about-team__item:hover .about-team__more,
.page-about .about-team__item:focus-within .about-team__more{
  max-height: 140px;
  opacity: 1;
  margin-top: 12px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-figure{
  margin: clamp(22px, 4vw, 34px) 0 0;
}

.page-about .about-timeline{
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before{
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--teal), var(--yellow) 55%, var(--red));
  opacity: .55;
}

.page-about .about-node{
  position: relative;
  padding-left: 38px;
}

.page-about .about-node + .about-node{
  margin-top: 14px;
}

.page-about .about-node::before{
  content: "";
  position: absolute;
  left: 2px;
  top: 18px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--field);
  border: 3px solid var(--yellow);
}

.page-about .about-node--red::before{ border-color: var(--red); }
.page-about .about-node--teal::before{ border-color: var(--teal); }

.page-about .about-node__details{
  border-radius: var(--radius-md);
  border: 1px solid var(--line-soft);
  background: rgba(2,10,8,.3);
}

.page-about .about-node__summary{
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-node__summary::-webkit-details-marker{
  display: none;
}

.page-about .about-node__summary::after{
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--yellow);
}

.page-about .about-node__details[open] .about-node__summary::after{
  content: "−";
}

.page-about .about-node__summary:focus-visible{
  outline: 2px solid var(--yellow);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.page-about .about-node__year{
  font-family: var(--font-mono);
  font-size: 1.05rem;
  letter-spacing: .06em;
  color: var(--yellow);
}

.page-about .about-node__label{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.26rem;
}

.page-about .about-node__body{
  margin: 0;
  padding: 0 18px 18px;
  font-size: .92rem;
  line-height: 1.78;
  color: rgba(243,247,242,.8);
}

/* ---------- 协作生态 ---------- */
.page-about .about-eco{
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

.page-about .about-eco__intro{
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: .96rem;
  line-height: 1.8;
  color: rgba(243,247,242,.82);
}

.page-about .about-eco__list{
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
}

.page-about .about-eco__item{
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px dashed var(--line);
}

.page-about .about-eco__n{
  flex: 0 0 auto;
  min-width: 2.4ch;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.45rem;
  color: var(--yellow);
}

.page-about .about-eco__t{
  font-size: .94rem;
  line-height: 1.72;
  color: rgba(243,247,242,.82);
}

.page-about .about-eco__note{
  margin: 18px 0 0;
  font-size: .92rem;
  line-height: 1.78;
  color: rgba(169,195,206,.92);
}

/* ---------- 荣誉与数字 ---------- */
.page-about .about-honors{
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-badge{
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  padding: 30px 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--yellow-soft);
  background:
    radial-gradient(circle at 50% 0%, rgba(255,201,60,.24), transparent 68%),
    rgba(2,10,8,.36);
  transition: border-color .25s ease, transform .25s ease;
}

.page-about .about-badge:hover{
  transform: translateY(-3px);
  border-color: var(--yellow);
}

.page-about .about-badge:focus-visible{
  outline: 2px solid var(--yellow);
  outline-offset: 3px;
}

.page-about .about-badge__ring{
  display: grid;
  place-items: center;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  border: 2px dashed var(--yellow);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  letter-spacing: .12em;
  color: var(--yellow);
}

.page-about .about-badge__title{
  font-family: var(--font-display);
  font-size: 1.3rem;
  line-height: 1.3;
}

.page-about .about-badge__sub{
  font-size: .82rem;
  line-height: 1.66;
  color: rgba(243,247,242,.7);
}

.page-about .about-honor__text p{
  margin: 0 0 1em;
  font-size: .95rem;
  line-height: 1.82;
  color: rgba(243,247,242,.82);
}

.page-about .about-stats{
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-stat{
  border-top: 2px solid var(--teal);
  padding-top: 12px;
}

.page-about .about-stat--red{ border-top-color: var(--red); }
.page-about .about-stat--yellow{ border-top-color: var(--yellow); }

.page-about .about-stat__n{
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  letter-spacing: -.01em;
}

.page-about .about-stat__l{
  display: block;
  margin-top: 6px;
  font-size: .82rem;
  color: var(--data);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta{
  background: linear-gradient(140deg, var(--field) 0%, var(--turf) 62%);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__inner{
  max-width: 720px;
}

.page-about .about-cta__title{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.8rem, 4.8vw, 2.8rem);
  line-height: 1.08;
}

.page-about .about-cta__text{
  margin: 16px 0 0;
  font-size: .96rem;
  line-height: 1.8;
  color: rgba(243,247,242,.8);
}

.page-about .about-cta__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px){
  .page-about .about-team{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px){
  .page-about .about-marks{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 820px){
  .page-about .about-lines{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-stats{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px){
  .page-about .about-split{
    grid-template-columns: minmax(170px, 250px) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-steps{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-eco{
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    align-items: center;
  }
  .page-about .about-honors{
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: center;
  }
  .page-about .about-rail{
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }
}

@media (min-width: 1040px){
  .page-about .about-team{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about *{
    transition: none !important;
    animation: none !important;
  }
}
<<<PAGE_CSS_END>>>