.page-about{
  --about-pad: clamp(18px, 3.6vw, 34px);
  --about-dash: rgba(62,142,90,.42);
  --about-line: rgba(11,13,12,.12);
  --about-orange-deep: #C94F1D;
  background: var(--paper);
  color: var(--ink);
  padding-bottom: clamp(44px, 8vw, 92px);
  overflow-x: clip;
}

.page-about .about-top{
  padding-top: clamp(12px, 2vw, 20px);
}

.page-about h1,
.page-about h2,
.page-about h3{
  margin: 0;
  font-family: var(--font-sans);
}

.page-about h1{
  font-size: clamp(1.9rem, 6.2vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  font-weight: 900;
}

.page-about h2{
  font-size: clamp(1.42rem, 3.4vw, 2.25rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  font-weight: 900;
}

.page-about h3{
  font-size: clamp(1.02rem, 1.8vw, 1.22rem);
  line-height: 1.42;
  font-weight: 700;
}

.page-about .media{
  margin: 0;
}

.page-about .media__img{
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  padding-block: clamp(14px, 2.6vw, 26px) clamp(24px, 4vw, 44px);
}

.page-about .about-hero::before{
  content: "";
  position: absolute;
  z-index: 0;
  top: -20%;
  right: -26%;
  width: min(82vw, 640px);
  aspect-ratio: 1;
  border-radius: 48% 52% 40% 60% / 56% 42% 58% 44%;
  background: radial-gradient(circle at 40% 40%, rgba(62,142,90,.20), rgba(62,142,90,0) 66%);
  pointer-events: none;
}

.page-about .about-hero__inner{
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 3.6vw, 46px);
  align-items: center;
}

.page-about .about-hero__visual{
  position: relative;
}

.page-about .about-hero__figure .media__img{
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-1);
}

.page-about .about-hero__stamp{
  position: absolute;
  right: 14px;
  bottom: 14px;
  display: inline-flex;
  align-items: center;
  padding: 6px 13px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  line-height: 1.4;
}

.page-about .about-hero__copy > * + *{
  margin-top: 14px;
}

.page-about .about-hero__lead{
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.8;
  color: var(--ink);
  max-width: 40em;
}

.page-about .about-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 4px;
}

/* ---------- 年份跳转条 ---------- */
.page-about .about-jump{
  padding-bottom: clamp(18px, 3vw, 34px);
}

.page-about .about-jump__label{
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-about .about-jump__list{
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-jump__link{
  flex: 0 0 auto;
  padding: 8px 15px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  background: #fff;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 13px;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible{
  background: var(--mist);
  border-color: var(--bamboo);
  color: var(--bamboo-deep);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section{
  position: relative;
  padding-block: clamp(32px, 5.4vw, 68px);
}

.page-about .about-section--tint{
  background: linear-gradient(180deg, rgba(232,239,233,.72), rgba(232,239,233,0) 72%);
}

.page-about .about-section__head{
  max-width: 44rem;
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-about .about-section__index{
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--bamboo-deep);
}

.page-about .about-section__lead{
  margin: 14px 0 0;
  color: var(--slate);
  line-height: 1.8;
  font-size: clamp(.97rem, 1.4vw, 1.05rem);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline{
  position: relative;
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .about-timeline::before{
  content: "";
  position: absolute;
  left: 15px;
  top: 12px;
  bottom: 12px;
  border-left: 2px dashed var(--about-dash);
}

.page-about .about-era{
  position: relative;
  padding-left: 44px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .about-era::before{
  content: "";
  position: absolute;
  left: 7px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--bamboo);
}

.page-about .about-era--now::before{
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255,107,53,.16);
}

.page-about .about-era__card{
  background: #fff;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  padding: clamp(16px, 2.4vw, 24px);
  box-shadow: var(--shadow-1);
}

.page-about .about-era--now .about-era__card{
  border-color: rgba(255,107,53,.42);
  background: linear-gradient(180deg, rgba(255,107,53,.07), #fff 62%);
}

.page-about .about-era__year{
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: clamp(1.02rem, 2vw, 1.24rem);
  letter-spacing: .06em;
  color: var(--bamboo-deep);
}

.page-about .about-era--now .about-era__year{
  color: var(--about-orange-deep);
}

.page-about .about-era h3{
  margin-bottom: 8px;
}

.page-about .about-era__text{
  margin: 0;
  font-size: .97rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-era__text + .about-era__text{
  margin-top: 10px;
}

.page-about .about-era__text a{
  color: var(--bamboo-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(44,107,67,.35);
}

.page-about .about-era__text a:hover,
.page-about .about-era__text a:focus-visible{
  border-bottom-color: var(--bamboo-deep);
}

/* ---------- 团队 ---------- */
.page-about .about-team{
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  align-items: start;
}

.page-about .about-team__figure .media__img{
  aspect-ratio: 10 / 7;
  border-radius: var(--radius-l);
}

.page-about .about-team__caption{
  margin-top: 10px;
  font-size: .84rem;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-fold{
  margin-top: clamp(16px, 2.4vw, 22px);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: var(--mist);
}

.page-about .about-fold__summary{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  font-size: .94rem;
  font-weight: 700;
}

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

.page-about .about-fold__summary::after{
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.2rem;
  line-height: 1;
  color: var(--bamboo-deep);
}

.page-about .about-fold[open] .about-fold__summary::after{
  content: "–";
}

.page-about .about-fold__body{
  padding: 0 18px 18px;
}

.page-about .about-roles{
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-role{
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.page-about .about-role__count{
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--bamboo-deep);
  border: 1px solid rgba(62,142,90,.35);
  border-radius: 6px;
  padding: 1px 7px;
  white-space: nowrap;
}

.page-about .about-role__body{
  font-size: .9rem;
  line-height: 1.72;
  color: var(--slate);
}

.page-about .about-role__body strong{
  color: var(--ink);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco{
  position: relative;
  overflow: hidden;
  background: var(--navy);
  color: var(--paper);
  border-radius: var(--radius-l);
  padding: clamp(22px, 4vw, 46px);
}

.page-about .about-eco::after{
  content: "";
  position: absolute;
  right: -90px;
  bottom: -130px;
  width: min(60vw, 320px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(62,142,90,.5), rgba(62,142,90,0) 68%);
  pointer-events: none;
}

.page-about .about-eco > *{
  position: relative;
  z-index: 1;
}

.page-about .about-eco h3{
  color: var(--paper);
}

.page-about .about-eco__grid{
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-eco__figures{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2.2vw, 22px);
  margin-top: clamp(16px, 2.6vw, 24px);
}

.page-about .about-eco__figure{
  border-left: 2px solid rgba(247,245,239,.22);
  padding-left: 12px;
}

.page-about .about-eco__num{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  line-height: 1.1;
  color: var(--paper);
}

.page-about .about-eco__label{
  display: block;
  margin-top: 2px;
  font-size: .8rem;
  line-height: 1.55;
  color: rgba(247,245,239,.72);
}

.page-about .about-eco__list{
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-eco__list li{
  position: relative;
  padding-left: 18px;
  font-size: .9rem;
  line-height: 1.72;
  color: rgba(247,245,239,.86);
}

.page-about .about-eco__list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--orange);
}

.page-about .about-eco__figure-wrap{
  margin: 0;
}

.page-about .about-eco__figure-wrap .about-eco__img{
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-m);
  border: 1px solid rgba(247,245,239,.16);
}

/* ---------- 服务理念 ---------- */
.page-about .about-idea{
  display: grid;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-about .about-idea__body p{
  margin: 12px 0 0;
  line-height: 1.82;
  font-size: clamp(.97rem, 1.4vw, 1.04rem);
}

.page-about .about-chipset{
  background: #fff;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-l);
  padding: clamp(18px, 2.6vw, 26px);
  display: grid;
  gap: 16px;
  box-shadow: var(--shadow-1);
}

.page-about .about-chiprow{
  display: grid;
  gap: 8px;
}

.page-about .about-chiprow__key{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--bamboo-deep);
}

.page-about .about-chiprow__list{
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-chip{
  display: inline-block;
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--mist);
  color: var(--bamboo-deep);
  font-size: .8rem;
  line-height: 1.5;
}

.page-about .about-chiprow__note{
  margin: 0;
  font-size: .85rem;
  line-height: 1.7;
  color: var(--slate);
  border-top: 1px dashed var(--about-dash);
  padding-top: 12px;
}

/* ---------- 联络 ---------- */
.page-about .about-contact{
  background: var(--sand);
  border-radius: var(--radius-l);
  padding: clamp(22px, 3.6vw, 42px);
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-contact h2{
  margin-bottom: 12px;
}

.page-about .about-contact__list{
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  align-content: start;
}

.page-about .about-contact__item{
  display: grid;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(11,13,12,.16);
}

.page-about .about-contact__item:last-child{
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-contact__key{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-about .about-contact__val{
  font-size: .96rem;
  line-height: 1.65;
  color: var(--ink);
  word-break: break-word;
}

.page-about .about-contact__more{
  color: var(--bamboo-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(44,107,67,.4);
}

.page-about .about-contact__more:hover,
.page-about .about-contact__more:focus-visible{
  border-bottom-color: var(--bamboo-deep);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px){
  .page-about .about-hero__stamp{
    font-size: 11px;
    right: 18px;
    bottom: 18px;
  }
}

@media (min-width: 860px){
  .page-about .about-era{
    padding-left: 56px;
  }
  .page-about .about-timeline::before{
    left: 20px;
  }
  .page-about .about-era::before{
    left: 12px;
  }
  .page-about .about-contact{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
}

@media (min-width: 920px){
  .page-about .about-hero__inner{
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  }
  .page-about .about-team,
  .page-about .about-idea{
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .page-about .about-team{
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
  .page-about .about-eco__figures{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1040px){
  .page-about .about-eco__grid{
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: center;
  }
  .page-about .about-eco__figures{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .about-jump__link{
    transition: none;
  }
}
<<<END>>>