.page-about{
  --ab-ghost: rgba(43, 245, 200, .13);
  --ab-card-bg: rgba(16, 48, 41, .74);
  --ab-wine-deep: #320F1E;
  --ab-wine-bg: #2A1020;
  background: var(--ink-950);
  color: var(--fog-200);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .shell{
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

.page-about h1,
.page-about h2,
.page-about h3{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.12;
  color: var(--fog-200);
}

.page-about p{ margin: 0; }
.page-about ul,
.page-about ol,
.page-about dl{ margin: 0; padding: 0; list-style: none; }

.page-about .mono{ font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- 首屏框景 ---------- */
.ab-hero{
  position: relative;
  padding-block: clamp(16px, 3vw, 26px) clamp(38px, 6vw, 84px);
  background:
    radial-gradient(120% 90% at 85% -12%, rgba(43, 245, 200, .13), transparent 60%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-950) 100%);
}

.page-about .breadcrumbs{ margin-bottom: clamp(14px, 2.4vw, 24px); }

.ab-hero__frame{
  position: relative;
  padding: clamp(20px, 4.4vw, 58px);
  border: 1px solid var(--line);
  border-radius: var(--r-organic);
  background: linear-gradient(158deg, rgba(16, 48, 41, .86) 0%, rgba(5, 17, 14, .94) 72%);
  box-shadow: inset 0 0 0 1px rgba(220, 232, 226, .04);
  overflow: hidden;
}

.ab-hero__frame::before,
.ab-hero__frame::after{
  content: "";
  position: absolute;
  left: clamp(18px, 3vw, 34px);
  right: clamp(18px, 3vw, 34px);
  height: 7px;
  background: repeating-linear-gradient(90deg, var(--cyan-400) 0 1px, transparent 1px 17px);
  opacity: .3;
  pointer-events: none;
}
.ab-hero__frame::before{ top: 0; }
.ab-hero__frame::after{ bottom: 0; }

.ab-hero__eyebrow{
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .22em;
  color: var(--cyan-400);
  text-transform: uppercase;
}

.ab-title{
  margin-top: 16px !important;
  font-size: clamp(2.05rem, 6.2vw, 4.3rem);
  max-width: 17ch;
}

.ab-hero__lede{
  margin-top: clamp(18px, 2.6vw, 24px);
  max-width: 58ch;
  font-size: clamp(1rem, 1.3vw, 1.1rem);
  line-height: 1.8;
  color: var(--fog-200);
  opacity: .86;
}

.ab-hero__facts{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
  margin-top: clamp(26px, 4vw, 42px);
  padding-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--line-soft);
}

.ab-fact__label{
  font-size: 12px;
  letter-spacing: .15em;
  color: var(--fog-200);
  opacity: .62;
}
.ab-fact__num{
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  color: var(--cyan-400);
  letter-spacing: -.02em;
}

.ab-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.6vw, 34px);
}

/* ---------- 章节骨架 ---------- */
.ab-sec{
  position: relative;
  padding-block: clamp(50px, 8vw, 110px);
}
.ab-sec--timeline{ background: var(--ink-950); }
.ab-sec--deep{ background: linear-gradient(180deg, var(--ink-900), var(--ink-950)); }
.ab-sec--wine{
  background: linear-gradient(168deg, var(--wine-700) 0%, var(--ab-wine-bg) 52%, var(--ink-950) 100%);
}

.ab-head{
  display: grid;
  gap: 14px;
  max-width: 72ch;
}
.ab-head__label{
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--gold-500);
  text-transform: uppercase;
}
.ab-head__title{
  font-size: clamp(1.5rem, 3.4vw, 2.5rem);
}
.ab-head__note{
  font-size: clamp(.96rem, 1.1vw, 1.02rem);
  line-height: 1.8;
  color: var(--fog-200);
  opacity: .8;
  max-width: 64ch;
}

/* ---------- 图片 ---------- */
.ab-fig{
  margin: 0;
}
.ab-fig__media{
  border: 1px solid var(--line);
  border-radius: var(--r-organic);
  overflow: hidden;
  background: var(--ink-800);
}
.ab-fig__media img{
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}
.ab-fig__caption{
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog-200);
  opacity: .62;
}
.ab-fig--wide{ margin-top: clamp(30px, 5vw, 52px); }
.ab-fig--wide .ab-fig__media img{ aspect-ratio: 7 / 4; }
.ab-fig--team{ margin-top: clamp(30px, 5vw, 54px); }
.ab-fig--team .ab-fig__media img{ aspect-ratio: 3 / 2; }

/* ---------- 时间轴 ---------- */
.ab-tlhead{
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: 24px;
}

.ab-tlwrap{
  position: relative;
  display: grid;
  gap: 26px;
  margin-top: clamp(30px, 5vw, 56px);
}

.ab-years__label{
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--fog-200);
  opacity: .55;
  margin-bottom: 10px;
}
.ab-years__list{
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}
.ab-years__link{
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-cut);
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .08em;
  color: var(--fog-200);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}
.ab-years__link:hover,
.ab-years__link:focus-visible{
  border-color: var(--cyan-400);
  color: var(--cyan-400);
  background: rgba(43, 245, 200, .07);
}

.ab-tl{
  position: relative;
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
}
.ab-tl::before{
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-400), rgba(43, 245, 200, .08));
  opacity: .7;
}

.ab-tl__item{
  position: relative;
  padding-left: 32px;
}
.ab-tl__item::before{
  content: "";
  position: absolute;
  left: 1px;
  top: 24px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--gold-500);
  box-shadow: 0 0 0 4px rgba(242, 181, 68, .16);
}

.ab-tl__card{
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-cut);
  background: linear-gradient(150deg, var(--ab-card-bg), rgba(10, 30, 25, .82));
  transition: border-color .25s var(--ease), background .25s var(--ease), transform .25s var(--ease);
}
.ab-tl__card:hover,
.ab-tl__card:focus-within{
  border-color: var(--cyan-400);
  background: linear-gradient(150deg, rgba(20, 58, 50, .9), rgba(10, 30, 25, .88));
  transform: translateY(-2px);
}

.ab-tl__ghost{
  position: absolute;
  right: 10px;
  top: -8px;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(3.2rem, 8.6vw, 5.6rem);
  line-height: 1;
  letter-spacing: -.05em;
  color: var(--cyan-400);
  opacity: .13;
  pointer-events: none;
}

.ab-tl__year{
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .2em;
  color: var(--gold-500);
  text-transform: uppercase;
}
.ab-tl__title{
  margin-top: 10px !important;
  font-size: clamp(1.08rem, 1.9vw, 1.32rem);
  max-width: 34ch;
}
.ab-tl__text{
  margin-top: 10px;
  font-size: .98rem;
  line-height: 1.78;
  color: var(--fog-200);
  opacity: .82;
  max-width: 62ch;
}

.ab-tl__more{ margin-top: 14px; }
.ab-tl__more summary{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: .88rem;
  letter-spacing: .04em;
  color: var(--cyan-400);
  border-bottom: 1px solid rgba(43, 245, 200, .28);
  padding-bottom: 2px;
}
.ab-tl__more summary::-webkit-details-marker{ display: none; }
.ab-tl__more summary::before{
  content: "+";
  font-family: var(--font-mono);
  font-size: .95rem;
}
.ab-tl__more[open] summary::before{ content: "–"; }
.ab-tl__more-body{
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-size: .94rem;
  line-height: 1.78;
  color: var(--fog-200);
  opacity: .84;
}
.ab-tl__more-body p + p{ margin-top: 10px; }

.link-more{
  display: inline-block;
  color: var(--cyan-400);
  text-decoration: none;
  font-size: .9rem;
  letter-spacing: .02em;
  border-bottom: 1px solid rgba(43, 245, 200, .3);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.link-more:hover,
.link-more:focus-visible{
  color: var(--gold-500);
  border-color: rgba(242, 181, 68, .5);
}

/* ---------- 版本节点 ---------- */
.ab-version{
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  gap: 14px;
  border-top: 1px solid var(--line-soft);
}
.ab-version__item{
  display: grid;
  gap: 6px;
  padding-block: 16px;
  border-bottom: 1px solid var(--line-soft);
}
.ab-version__tag{
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--fog-200);
  opacity: .55;
  text-transform: uppercase;
}
.ab-version__name{
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  color: var(--cyan-400);
  letter-spacing: -.01em;
}
.ab-version__desc{
  font-size: .94rem;
  line-height: 1.7;
  color: var(--fog-200);
  opacity: .78;
}

/* ---------- 三个小组 ---------- */
.ab-team__grid{
  margin-top: clamp(28px, 4.4vw, 48px);
  display: grid;
  gap: 18px;
}
.ab-team__card{
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid rgba(242, 181, 68, .26);
  border-radius: var(--r-organic);
  background: rgba(5, 17, 14, .58);
  color: var(--fog-200);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.ab-team__card:hover,
.ab-team__card:focus-within{
  border-color: var(--gold-500);
  background: rgba(5, 17, 14, .74);
}
.ab-team__icon{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(43, 245, 200, .34);
  border-radius: 50%;
  color: var(--cyan-200);
}
.ab-team__title{
  margin-top: 14px !important;
  font-size: clamp(1.08rem, 1.8vw, 1.24rem);
}
.ab-team__text{
  margin-top: 10px;
  font-size: .96rem;
  line-height: 1.78;
  color: var(--fog-200);
  opacity: .84;
}
.ab-team__tags{
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}
.ab-team__tags .chip{
  font-size: .74rem;
  padding: 4px 10px;
  border: 1px solid rgba(43, 245, 200, .3);
  border-radius: var(--r-cut);
  color: var(--cyan-200);
  background: rgba(43, 245, 200, .07);
}
.ab-team__foot{ margin-top: 16px; }

/* ---------- 更新节奏 ---------- */
.ab-cadence{
  margin-top: clamp(26px, 4vw, 42px);
  border-top: 1px solid var(--line-soft);
}
.ab-cadence__row{
  display: grid;
  gap: 6px;
  padding-block: 16px;
  border-bottom: 1px solid var(--line-soft);
}
.ab-cadence__time{
  font-size: .92rem;
  letter-spacing: .04em;
  color: var(--cyan-400);
}
.ab-cadence__desc{
  font-size: .96rem;
  line-height: 1.75;
  color: var(--fog-200);
  opacity: .82;
}

.ab-review{
  margin-top: clamp(30px, 4.4vw, 48px);
  padding: clamp(20px, 3.4vw, 32px);
  border-left: 2px solid var(--gold-500);
  border-radius: var(--r-cut);
  background: rgba(36, 31, 77, .42);
}
.ab-review__title{
  font-size: clamp(1.05rem, 1.9vw, 1.24rem);
}
.ab-review__text{
  margin-top: 10px !important;
  max-width: 62ch;
  font-size: .97rem;
  line-height: 1.8;
  color: var(--fog-200);
  opacity: .84;
}
.ab-review__actions{
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 认证与信息 ---------- */
.ab-cert{
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: 18px;
}
.ab-cert__panel{
  padding: clamp(20px, 3.2vw, 30px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-organic);
  background: linear-gradient(160deg, rgba(16, 48, 41, .7), rgba(5, 17, 14, .8));
}
.ab-cert__panel--info{
  background: linear-gradient(160deg, rgba(36, 31, 77, .5), rgba(5, 17, 14, .86));
  border-color: rgba(242, 181, 68, .22);
}
.ab-badges{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.ab-badges .badge{
  font-size: .78rem;
  letter-spacing: .06em;
  padding: 6px 12px;
  border: 1px solid rgba(242, 181, 68, .45);
  border-radius: var(--r-cut);
  color: var(--gold-500);
  background: rgba(242, 181, 68, .07);
}
.ab-cert__text{
  margin-top: 16px !important;
  max-width: 58ch;
  font-size: .97rem;
  line-height: 1.8;
  color: var(--fog-200);
  opacity: .84;
}

.ab-info{ display: grid; gap: 0; }
.ab-info__row{
  display: grid;
  gap: 4px;
  padding-block: 12px;
  border-bottom: 1px solid var(--line-soft);
}
.ab-info__row:last-child{ border-bottom: 0; }
.ab-info__key{
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--fog-200);
  opacity: .58;
}
.ab-info__val{
  font-size: .98rem;
  color: var(--fog-200);
  word-break: break-word;
}
.ab-cert__more{ margin-top: 14px !important; }

/* ---------- 合作生态 ---------- */
.ab-map{
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: 24px;
  padding: clamp(20px, 3.6vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--r-organic);
  background-color: rgba(10, 30, 25, .66);
  background-image: radial-gradient(rgba(43, 245, 200, .22) 1px, transparent 1px);
  background-size: 16px 16px;
  background-position: 0 0;
}
.ab-map__stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.ab-map__stat{
  padding: 14px;
  border-radius: var(--r-cut);
  background: rgba(5, 17, 14, .82);
  border: 1px solid var(--line-soft);
}
.ab-map__num{
  display: block;
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  color: var(--cyan-400);
  letter-spacing: -.02em;
}
.ab-map__label{
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--fog-200);
  opacity: .66;
}
.ab-map__body p{
  font-size: .97rem;
  line-height: 1.8;
  color: var(--fog-200);
  opacity: .84;
  max-width: 60ch;
}
.ab-map__body p + p{ margin-top: 14px; }
.ab-map__links{
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  opacity: 1 !important;
}

/* ---------- 编辑原则 ---------- */
.ab-principles{
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  gap: 0;
}
.ab-principle{
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  padding-block: clamp(18px, 2.6vw, 26px);
  border-top: 1px solid var(--line-soft);
}
.ab-principle:last-child{ border-bottom: 1px solid var(--line-soft); }
.ab-principle__num{
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  font-weight: 200;
  color: var(--gold-500);
  opacity: .9;
}
.ab-principle__title{ font-size: clamp(1.02rem, 1.8vw, 1.2rem); }
.ab-principle__text{
  margin-top: 8px;
  max-width: 62ch;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--fog-200);
  opacity: .82;
}

/* ---------- 后续入口 ---------- */
.ab-next{
  margin-top: clamp(34px, 5vw, 58px);
}
.ab-next__label{
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--gold-500);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.ab-next__grid{
  display: grid;
  gap: 12px;
}
.ab-next__card{
  display: grid;
  gap: 8px;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-cut);
  text-decoration: none;
  color: var(--fog-200);
  background: rgba(16, 48, 41, .46);
  transition: border-color .22s var(--ease), background .22s var(--ease), transform .22s var(--ease);
}
.ab-next__card:hover,
.ab-next__card:focus-visible{
  border-color: var(--cyan-400);
  background: rgba(20, 58, 50, .7);
  transform: translateY(-2px);
}
.ab-next__kicker{
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--cyan-400);
}
.ab-next__title{
  font-size: .98rem;
  letter-spacing: .01em;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px){
  .ab-hero__facts{ grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .ab-cadence__row{ grid-template-columns: 180px 1fr; gap: 24px; align-items: baseline; }
  .ab-info__row{ grid-template-columns: 130px 1fr; align-items: baseline; gap: 16px; }
  .ab-next__grid{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px){
  .ab-tlhead{ grid-template-columns: 1.02fr .98fr; align-items: center; gap: 40px; }
  .ab-tlhead .ab-fig{ order: 2; }
  .ab-team__grid{ grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: start; gap: 20px; }
  .ab-team__card:nth-child(2){ margin-top: 40px; }
  .ab-team__card:nth-child(3){ margin-top: 16px; }
  .ab-cert{ grid-template-columns: 1.1fr .9fr; gap: 22px; }
  .ab-map{ grid-template-columns: .85fr 1.15fr; align-items: start; gap: 32px; }
  .ab-map__stats{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ab-version__item{ grid-template-columns: 170px 200px 1fr; align-items: baseline; gap: 20px; }
  .ab-principle{ grid-template-columns: 76px 1fr; gap: 24px; }
  .ab-next__grid{ grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 960px){
  .ab-tlwrap{ grid-template-columns: 178px 1fr; gap: 46px; }
  .ab-years{ position: sticky; top: 118px; align-self: start; }
  .ab-years__list{
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }
  .ab-years__link{
    display: block;
    border-color: transparent;
    padding: 5px 0;
    background: none;
  }
  .ab-years__link:hover,
  .ab-years__link:focus-visible{
    background: none;
    border-color: transparent;
    color: var(--cyan-400);
  }
  .ab-tl__item{ padding-left: 38px; }
}

@media (min-width: 1080px){
  .ab-tl__card{ padding: 30px 34px; }
  .ab-tl__ghost{ font-size: 6rem; right: 18px; }
}

@media (hover: hover){
  .ab-team__tags{
    opacity: 0;
    transform: translateY(4px);
    transition: opacity .24s var(--ease), transform .24s var(--ease);
  }
  .ab-team__card:hover .ab-team__tags,
  .ab-team__card:focus-within .ab-team__tags{
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about *{
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
  .ab-tl__card:hover,
  .ab-tl__card:focus-within,
  .ab-next__card:hover,
  .ab-next__card:focus-visible{ transform: none; }
  .ab-team__tags{ opacity: 1; transform: none; }
}
<<<END>>>