.page-about{
  --about-rail-w:236px;
  --about-stack:clamp(20px,3.4vw,44px);
  display:block;
  position:relative;
  background:var(--ink-900);
  color:var(--paper);
  padding-bottom:clamp(48px,7vw,96px);
  overflow-x:hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  border-bottom:1px solid var(--line);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(180deg, rgba(14,21,36,.92) 0%, rgba(7,11,20,.98) 78%),
    repeating-linear-gradient(0deg, rgba(34,48,71,.55) 0 1px, transparent 1px 52px),
    repeating-linear-gradient(90deg, rgba(34,48,71,.55) 0 1px, transparent 1px 52px);
  background-position:0 0, 0 0, 0 0;
  overflow:hidden;
}
.page-about .about-hero::after{
  content:"";
  position:absolute;
  top:-160px;
  right:-180px;
  width:520px;
  height:520px;
  background:linear-gradient(135deg, rgba(255,107,44,.20) 0%, rgba(56,242,208,.10) 52%, transparent 72%);
  transform:rotate(16deg);
  pointer-events:none;
}
.page-about .about-hero::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:1px;
  background:linear-gradient(90deg, transparent, var(--cyan) 42%, var(--signal) 68%, transparent);
  opacity:.6;
}
.page-about .about-hero__grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(28px,4.4vw,56px);
  padding-top:clamp(26px,4vw,52px);
  padding-bottom:clamp(36px,6vw,76px);
}

.page-about .breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  list-style:none;
  margin:0 0 20px;
  padding:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--metal-dim);
}
.page-about .breadcrumb li+li::before{
  content:"/";
  margin-right:8px;
  color:var(--line);
}
.page-about .breadcrumb a{
  color:var(--cyan);
  text-decoration:none;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible{
  color:var(--cyan-soft);
  text-decoration:underline;
}
.page-about .breadcrumb li[aria-current="page"]{
  color:var(--metal);
}

.page-about .about-hero__stamp{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 clamp(16px,2.4vw,24px);
  padding:6px 12px;
  border:1px solid var(--line);
  background:rgba(14,21,36,.78);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.14em;
  color:var(--metal);
  text-transform:uppercase;
}
.page-about .about-hero__stamp-num{
  color:var(--signal);
  font-weight:700;
  letter-spacing:.1em;
}

.page-about .about-hero h1{
  margin:0 0 clamp(16px,2.4vw,24px);
  font-family:var(--font-sans);
  font-weight:300;
  font-size:clamp(32px,6.4vw,66px);
  line-height:1.08;
  letter-spacing:.01em;
  color:var(--paper);
}
.page-about .about-hero__accent{
  display:inline-block;
  color:var(--signal);
  font-weight:600;
  letter-spacing:.02em;
}

.page-about .about-hero__lede{
  margin:0 0 clamp(22px,3vw,32px);
  max-width:56ch;
  font-size:clamp(15px,1.7vw,17px);
  line-height:1.85;
  color:var(--metal);
}

.page-about .about-hero__facts{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  margin:0 0 clamp(24px,3.4vw,36px);
  padding:0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.page-about .about-fact{
  display:flex;
  flex-direction:column-reverse;
  gap:4px;
  flex:1 1 110px;
  min-width:0;
  padding:14px 16px 14px 0;
  border-right:1px solid var(--line);
}
.page-about .about-fact:last-child{
  border-right:0;
  padding-right:0;
}
.page-about .about-fact dt{
  font-size:12px;
  letter-spacing:.06em;
  color:var(--metal-dim);
}
.page-about .about-fact dd{
  margin:0;
  font-family:var(--font-mono);
  font-size:clamp(24px,3.4vw,32px);
  font-weight:600;
  line-height:1;
  color:var(--cyan);
}

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

.page-about .about-hero__media{
  margin:0;
}
.page-about .about-hero__frame{
  position:relative;
  border:1px solid var(--line);
  background:var(--ink-800);
  padding:8px;
}
.page-about .about-hero__frame::after{
  content:"";
  position:absolute;
  inset:8px;
  border:1px solid rgba(56,242,208,.24);
  pointer-events:none;
}
.page-about .about-hero__frame img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  object-fit:cover;
  filter:saturate(.92) contrast(1.04);
}
.page-about .about-hero__media figcaption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--metal-dim);
  text-transform:uppercase;
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(24px,3.4vw,52px);
  padding-top:clamp(32px,5.4vw,72px);
}

.page-about .about-rail{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:12px 0;
}
.page-about .about-rail__title{
  margin:0 0 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.2em;
  color:var(--metal-dim);
  text-transform:uppercase;
}
.page-about .about-rail__list{
  display:flex;
  gap:8px;
  list-style:none;
  margin:0;
  padding:0;
  overflow-x:auto;
  scrollbar-width:thin;
}
.page-about .about-rail__list li{
  flex:0 0 auto;
}
.page-about .about-rail__list a{
  display:block;
  padding:7px 12px;
  border:1px solid var(--line);
  background:rgba(14,21,36,.7);
  color:var(--metal);
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible{
  color:var(--cyan-soft);
  border-color:rgba(56,242,208,.5);
}
.page-about .about-rail__list a[aria-current]{
  color:var(--ink-900);
  background:var(--cyan);
  border-color:var(--cyan);
  font-weight:700;
}

/* ---------- 章节 ---------- */
.page-about .about-section{
  padding-bottom:clamp(40px,6vw,84px);
  margin-bottom:clamp(40px,6vw,84px);
  border-bottom:1px solid var(--line-soft);
}
.page-about .about-section:last-child{
  border-bottom:0;
  margin-bottom:0;
  padding-bottom:0;
}

.page-about .about-head{
  display:flex;
  align-items:flex-start;
  gap:clamp(14px,2.2vw,26px);
  margin-bottom:clamp(18px,2.6vw,28px);
}
.page-about .about-head__num{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:clamp(38px,6.6vw,72px);
  font-weight:700;
  line-height:.85;
  letter-spacing:-.03em;
  color:transparent;
  -webkit-text-stroke:1px var(--line);
  text-shadow:none;
}
.page-about .about-head__text{
  min-width:0;
  padding-top:4px;
}
.page-about .about-head__text .eyebrow{
  margin:0 0 8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  color:var(--signal);
  text-transform:uppercase;
}
.page-about .about-head h2{
  margin:0;
  font-size:clamp(21px,3.1vw,34px);
  font-weight:500;
  line-height:1.32;
  letter-spacing:.01em;
  color:var(--paper);
}

.page-about .about-lead{
  margin:0 0 clamp(20px,3vw,32px);
  max-width:64ch;
  font-size:clamp(15px,1.6vw,16.5px);
  line-height:1.9;
  color:var(--metal);
}

/* ---------- 三条线索 ---------- */
.page-about .about-points{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.page-about .about-point{
  position:relative;
  background:var(--ink-800);
  padding:clamp(18px,2.6vw,26px);
  transition:background-color .24s var(--ease);
}
.page-about .about-point::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  width:2px;
  height:0;
  background:var(--signal);
  transition:height .3s var(--ease);
}
.page-about .about-point:hover{
  background:var(--ink-700);
}
.page-about .about-point:hover::before{
  height:100%;
}
.page-about .about-point__mark{
  display:inline-block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--cyan);
}
.page-about .about-point h3{
  margin:0 0 8px;
  font-size:16.5px;
  font-weight:600;
  color:var(--paper);
}
.page-about .about-point p{
  margin:0;
  font-size:14.5px;
  line-height:1.8;
  color:var(--metal);
}

.page-about .about-note{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-start;
  gap:12px;
  margin-top:clamp(18px,2.6vw,26px);
  padding:16px 18px;
  border:1px dashed rgba(56,242,208,.38);
  background:rgba(56,242,208,.045);
}
.page-about .about-note p{
  margin:0;
  flex:1 1 240px;
  font-size:14.5px;
  line-height:1.8;
  color:var(--metal);
}

/* ---------- 刻度尺与时间轴 ---------- */
.page-about .about-ruler{
  display:block;
  width:100%;
  max-width:640px;
  height:auto;
  margin:0 0 clamp(20px,3vw,32px);
  overflow:visible;
}

.page-about .about-timeline{
  list-style:none;
  margin:0;
  padding:0;
  position:relative;
}
.page-about .about-timeline::before{
  content:"";
  position:absolute;
  left:5px;
  top:8px;
  bottom:26px;
  width:1px;
  background:linear-gradient(180deg, var(--metal-dim) 0%, var(--cyan) 55%, var(--signal) 100%);
}
.page-about .about-timeline__item{
  position:relative;
  padding-left:clamp(26px,4vw,40px);
  padding-bottom:clamp(22px,3vw,30px);
}
.page-about .about-timeline__item:last-child{
  padding-bottom:0;
}
.page-about .about-timeline__item::before{
  content:"";
  position:absolute;
  left:0;
  top:7px;
  width:11px;
  height:11px;
  background:var(--ink-900);
  border:1px solid var(--metal-dim);
  border-radius:50%;
}
.page-about .about-timeline__item--current::before{
  background:var(--signal);
  border-color:var(--signal);
  box-shadow:0 0 0 4px rgba(255,107,44,.18);
}
.page-about .about-timeline__year{
  display:block;
  margin-bottom:6px;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.16em;
  color:var(--cyan);
}
.page-about .about-timeline__body h3{
  margin:0 0 8px;
  font-size:clamp(16px,2.1vw,18px);
  font-weight:600;
  line-height:1.45;
  color:var(--paper);
}
.page-about .about-timeline__body p{
  margin:0 0 12px;
  font-size:14.5px;
  line-height:1.82;
  color:var(--metal);
}

/* ---------- 图像区块 ---------- */
.page-about .about-figure{
  margin:clamp(20px,3.2vw,34px) 0 0;
}
.page-about .about-figure__frame{
  position:relative;
  padding:8px;
  border:1px solid var(--line);
  background:var(--ink-800);
}
.page-about .about-figure__frame::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:34px;
  height:34px;
  border-top:2px solid var(--signal);
  border-left:2px solid var(--signal);
  pointer-events:none;
}
.page-about .about-figure__frame img{
  display:block;
  width:100%;
  max-width:100%;
  height:auto;
  object-fit:cover;
}
.page-about .about-figure figcaption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--metal-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team{
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
}
.page-about .about-team__card{
  position:relative;
  padding:clamp(18px,2.6vw,26px);
  border:1px solid var(--line);
  background:linear-gradient(160deg, rgba(14,21,36,.96), rgba(7,11,20,.96));
  transition:transform .26s var(--ease), border-color .26s var(--ease), box-shadow .26s var(--ease);
}
.page-about .about-team__card:hover{
  transform:translateY(-3px);
  border-color:rgba(56,242,208,.42);
  box-shadow:0 14px 30px -18px rgba(56,242,208,.42);
}
.page-about .about-team__idx{
  display:inline-block;
  margin-bottom:10px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.18em;
  color:var(--metal-dim);
}
.page-about .about-team__card h3{
  margin:0 0 8px;
  font-size:17px;
  font-weight:600;
  color:var(--paper);
}
.page-about .about-team__card p{
  margin:0;
  font-size:14.5px;
  line-height:1.82;
  color:var(--metal);
}

.page-about .about-cadence{
  display:grid;
  grid-template-columns:1fr;
  gap:1px;
  margin-top:clamp(18px,2.6vw,26px);
  background:var(--line);
  border:1px solid var(--line);
}
.page-about .about-cadence__item{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:16px 18px;
  background:var(--ink-800);
}
.page-about .about-cadence__num{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:600;
  line-height:1;
  color:var(--signal);
}
.page-about .about-cadence__item p{
  margin:0;
  font-size:14px;
  line-height:1.65;
  color:var(--metal);
}

/* ---------- 覆盖与生态 ---------- */
.page-about .about-stats{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  margin-bottom:clamp(20px,3vw,32px);
}
.page-about .about-stat{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:clamp(16px,2.4vw,24px);
  background:var(--ink-800);
}
.page-about .about-stat__num{
  font-family:var(--font-mono);
  font-size:clamp(26px,4vw,38px);
  font-weight:600;
  line-height:1;
  color:var(--cyan);
}
.page-about .about-stat__label{
  font-size:12.5px;
  letter-spacing:.04em;
  line-height:1.5;
  color:var(--metal-dim);
}

.page-about .about-eco{
  padding:clamp(18px,2.8vw,28px);
  border:1px solid var(--line);
  background:var(--ink-800);
}
.page-about .about-eco h3{
  margin:0 0 10px;
  font-size:17px;
  font-weight:600;
  color:var(--paper);
}
.page-about .about-eco p{
  margin:0 0 14px;
  font-size:14.5px;
  line-height:1.85;
  color:var(--metal);
}
.page-about .about-eco__list{
  list-style:none;
  margin:0 0 14px;
  padding:0;
  border-top:1px dashed var(--line);
}
.page-about .about-eco__list li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  padding:11px 0;
  border-bottom:1px dashed var(--line);
  font-size:14px;
  line-height:1.7;
  color:var(--metal);
}
.page-about .about-eco__dot{
  flex:0 0 auto;
  width:6px;
  height:6px;
  margin-top:8px;
  background:var(--cyan);
  transform:rotate(45deg);
}
.page-about .about-eco__link{
  margin:0;
  font-size:14.5px;
  line-height:1.8;
  color:var(--metal);
}
.page-about .about-eco__link a{
  color:var(--cyan);
  text-decoration:none;
  border-bottom:1px solid rgba(56,242,208,.4);
}
.page-about .about-eco__link a:hover,
.page-about .about-eco__link a:focus-visible{
  color:var(--cyan-soft);
  border-bottom-color:var(--cyan-soft);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honour{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(16px,2.6vw,26px);
  padding:clamp(18px,2.8vw,28px);
  border:1px solid var(--line);
  background:
    linear-gradient(150deg, rgba(255,107,44,.10) 0%, rgba(14,21,36,.96) 46%),
    var(--ink-800);
}
.page-about .about-honour__badge{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:18px;
  border:1px solid rgba(255,107,44,.42);
  background:rgba(7,11,20,.72);
}
.page-about .about-honour__year{
  font-family:var(--font-mono);
  font-size:clamp(30px,4.6vw,44px);
  font-weight:700;
  line-height:1;
  color:var(--signal);
  letter-spacing:-.02em;
}
.page-about .about-honour__label{
  font-size:13px;
  line-height:1.7;
  color:var(--metal);
}
.page-about .about-honour__body h3{
  margin:0 0 10px;
  font-size:17px;
  font-weight:600;
  color:var(--paper);
}
.page-about .about-honour__body p{
  margin:0;
  font-size:14.5px;
  line-height:1.85;
  color:var(--metal);
}

.page-about .about-honour__tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:16px;
}
.page-about .about-tag{
  position:relative;
  display:inline-block;
  padding:6px 11px;
  border:1px solid var(--line);
  background:rgba(56,242,208,.07);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--cyan);
  cursor:default;
}
.page-about .about-tag::after{
  content:attr(data-note);
  position:absolute;
  left:0;
  bottom:calc(100% + 8px);
  z-index:3;
  width:max-content;
  max-width:220px;
  padding:7px 10px;
  border:1px solid var(--line);
  background:var(--ink-700);
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:12px;
  line-height:1.5;
  letter-spacing:0;
  white-space:normal;
  opacity:0;
  visibility:hidden;
  transform:translateY(4px);
  transition:opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
  pointer-events:none;
}
.page-about .about-tag:hover::after,
.page-about .about-tag:focus-visible::after{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

/* ---------- 收尾引导 ---------- */
.page-about .about-cta{
  margin-top:clamp(22px,3.4vw,34px);
  padding:clamp(20px,3vw,32px);
  border:1px solid var(--line);
  border-left:3px solid var(--signal);
  background:linear-gradient(120deg, rgba(255,107,44,.08), rgba(14,21,36,.9) 55%);
}
.page-about .about-cta__kicker{
  margin:0 0 8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.2em;
  color:var(--signal);
  text-transform:uppercase;
}
.page-about .about-cta__text{
  margin:0 0 18px;
  max-width:60ch;
  font-size:15px;
  line-height:1.85;
  color:var(--metal);
}
.page-about .about-cta__actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

/* ---------- 平板及桌面 ---------- */
@media (min-width:760px){
  .page-about .about-points{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .page-about .about-team{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .page-about .about-cadence{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .page-about .about-stats{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
}

@media (min-width:900px){
  .page-about .about-hero__grid{
    grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);
    align-items:center;
  }
  .page-about .about-honour{
    grid-template-columns:minmax(0,220px) minmax(0,1fr);
    align-items:start;
  }
}

@media (min-width:1000px){
  .page-about .about-body{
    grid-template-columns:var(--about-rail-w) minmax(0,1fr);
    align-items:start;
  }
  .page-about .about-rail{
    position:sticky;
    top:calc(var(--header-h) + 28px);
    align-self:start;
    border-top:0;
    border-bottom:0;
    border-left:1px solid var(--line);
    padding:2px 0 2px 18px;
    max-height:calc(100vh - var(--header-h) - 56px);
    overflow:visible;
  }
  .page-about .about-rail__list{
    display:block;
    overflow:visible;
  }
  .page-about .about-rail__list li{
    margin-bottom:6px;
  }
  .page-about .about-rail__list a{
    border:0;
    border-left:2px solid transparent;
    background:transparent;
    padding:7px 0 7px 12px;
    white-space:normal;
    color:var(--metal-dim);
  }
  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible{
    color:var(--cyan-soft);
    border-left-color:rgba(56,242,208,.55);
  }
  .page-about .about-rail__list a[aria-current]{
    color:var(--cyan);
    background:transparent;
    border-left-color:var(--signal);
    font-weight:600;
  }
}

@media (prefers-reduced-motion:reduce){
  .page-about .about-point,
  .page-about .about-point::before,
  .page-about .about-team__card,
  .page-about .about-rail__list a,
  .page-about .about-tag::after{
    transition:none;
  }
  .page-about .about-team__card:hover{
    transform:none;
  }
}
</main>