.page-about{
  --about-sheet-line:rgba(7,12,10,.14);
  --about-track-line:rgba(7,12,10,.18);
  background:var(--fp-ink);
  color:var(--fp-ivory);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  padding:30px 0 0;
  background:var(--fp-ink);
}
.page-about .about-hero::before{
  content:"";
  position:absolute;
  z-index:-2;
  inset:-12% -18% 0 -12%;
  background:linear-gradient(152deg,var(--fp-felt) 0%,rgba(18,54,43,.42) 56%,rgba(11,31,24,0) 100%);
  clip-path:polygon(0 0,74% 0,52% 100%,0 100%);
}
.page-about .about-hero::after{
  content:"";
  position:absolute;
  z-index:-1;
  top:-10%;
  bottom:-10%;
  left:46%;
  width:1px;
  background:linear-gradient(to bottom,transparent,var(--fp-line) 30%,var(--fp-line) 70%,transparent);
  transform:rotate(16deg);
}
.page-about .about-hero__inner{
  display:grid;
  gap:26px;
}
.page-about .about-hero__eyebrow{
  letter-spacing:.22em;
  color:var(--fp-gold);
}
.page-about .about-hero__title{
  font-family:var(--fp-serif);
  font-weight:700;
  font-size:clamp(2rem,7.4vw,3.75rem);
  line-height:1.06;
  letter-spacing:.01em;
  margin:14px 0 18px;
  color:var(--fp-ivory);
}
.page-about .about-hero__lede{
  max-width:54ch;
  color:rgba(243,235,221,.84);
  line-height:1.85;
}
.page-about .about-stats{
  list-style:none;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:14px 18px;
  margin:26px 0 0;
  padding:0;
}
.page-about .about-stats__item{
  border-top:1px solid var(--fp-line);
  padding-top:10px;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.page-about .about-stats__num{
  font-family:var(--fp-narrow);
  font-size:1.7rem;
  font-weight:700;
  letter-spacing:.04em;
  color:var(--fp-gold-hi);
}
.page-about .about-stats__label{
  font-size:.8rem;
  color:var(--fp-sage);
  letter-spacing:.04em;
}
.page-about .about-hero__figure{
  margin:0;
  position:relative;
  overflow:hidden;
  border-radius:var(--fp-radius) var(--fp-radius) 0 0;
  border:1px solid var(--fp-line-soft);
  border-bottom:0;
}
.page-about .about-hero__img{
  display:block;
  width:100%;
  height:clamp(190px,44vw,320px);
  object-fit:cover;
  filter:saturate(.92) contrast(1.04);
}
.page-about .about-hero__cap{
  position:absolute;
  left:0;
  bottom:0;
  right:0;
  padding:8px 14px;
  font-size:.68rem;
  letter-spacing:.14em;
  color:rgba(243,235,221,.78);
  background:linear-gradient(to top,rgba(7,12,10,.86),rgba(7,12,10,0));
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs{
  padding-top:16px;
  padding-bottom:16px;
  border-bottom:1px solid var(--fp-line-soft);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body{
  display:grid;
  gap:8px;
  padding-top:8px;
  padding-bottom:72px;
}
.page-about .about-main{
  min-width:0;
}

/* ---------- 侧边牌签锚点 ---------- */
.page-about .about-side{
  position:sticky;
  top:calc(var(--fp-header-h));
  z-index:4;
  order:-1;
  padding:10px 0;
  background:linear-gradient(to bottom,var(--fp-ink) 78%,rgba(11,31,24,0));
}
.page-about .about-anchors{
  display:flex;
  gap:8px;
  overflow-x:auto;
  padding-bottom:6px;
  scrollbar-width:thin;
}
.page-about .about-anchors__label{
  display:none;
  color:var(--fp-sage);
  font-size:.68rem;
  letter-spacing:.2em;
}
.page-about .about-anchors__link{
  flex:0 0 auto;
  padding:7px 13px;
  border:1px solid var(--fp-line-soft);
  border-radius:999px;
  font-size:.78rem;
  line-height:1.3;
  color:rgba(243,235,221,.76);
  text-decoration:none;
  white-space:nowrap;
  transition:color .25s var(--fp-ease),border-color .25s var(--fp-ease),background-color .25s var(--fp-ease),transform .25s var(--fp-ease);
}
.page-about .about-anchors__link:hover,
.page-about .about-anchors__link:focus-visible{
  color:var(--fp-gold-hi);
  border-color:var(--fp-gold);
  transform:translateX(2px);
}
.page-about .about-anchors__link.is-active{
  background:var(--fp-gold);
  border-color:var(--fp-gold);
  color:var(--fp-ink);
  font-weight:700;
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter{
  padding:38px 0 34px;
  border-top:1px solid var(--fp-line-soft);
}
.page-about .about-chapter:first-child{
  border-top:0;
}
.page-about .about-chapter__head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:16px;
  align-items:start;
}
.page-about .about-num{
  font-size:clamp(2rem,8vw,3.4rem);
  line-height:.86;
  font-weight:700;
  color:transparent;
  -webkit-text-stroke:1px var(--fp-gold);
  letter-spacing:-.02em;
}
.page-about .about-chapter__title{
  font-family:var(--fp-serif);
  font-size:clamp(1.32rem,4.4vw,1.95rem);
  line-height:1.24;
  margin:0 0 12px;
  color:var(--fp-ivory);
  letter-spacing:.01em;
}
.page-about .about-chapter__lede{
  margin:0;
  color:rgba(243,235,221,.72);
  line-height:1.8;
  max-width:62ch;
}
.page-about .about-chapter__body{
  margin-top:24px;
  display:grid;
  gap:22px;
}
.page-about .about-prose p{
  margin:0 0 16px;
  line-height:1.9;
  color:rgba(243,235,221,.86);
}
.page-about .about-prose p:last-child{
  margin-bottom:0;
}
.page-about .about-foot-note{
  margin:22px 0 0;
  padding-left:14px;
  border-left:2px solid var(--fp-gold);
  font-size:.86rem;
  line-height:1.75;
  color:var(--fp-sage);
}

/* ---------- 图片 ---------- */
.page-about .about-figure{
  margin:0;
}
.page-about .about-figure .fp-media__img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  border-radius:var(--fp-radius);
  filter:saturate(.94) contrast(1.03);
}
.page-about .about-figure--tall .fp-media__img{
  aspect-ratio:10 / 7;
  height:auto;
}

/* ---------- 02 原则（纸面） ---------- */
.page-about .about-sheet{
  background:var(--fp-paper);
  color:var(--fp-black);
  border-radius:var(--fp-radius);
  padding:30px 20px 28px;
  margin:26px 0;
  border-top:0;
  box-shadow:var(--fp-shadow);
}
.page-about .about-sheet .about-chapter__title{
  color:var(--fp-ink);
}
.page-about .about-sheet .about-chapter__lede{
  color:rgba(7,12,10,.68);
}
.page-about .about-sheet .about-num{
  -webkit-text-stroke:1px var(--fp-crimson);
}
.page-about .about-sheet .about-foot-note{
  border-left-color:var(--fp-crimson);
  color:rgba(7,12,10,.62);
}
.page-about .about-principles{
  margin-top:22px;
  border-top:1px solid var(--about-sheet-line);
}
.page-about .about-principle{
  border-bottom:1px solid var(--about-sheet-line);
}
.page-about .about-principle__summary{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:15px 2px;
  cursor:pointer;
  list-style:none;
  font-weight:700;
  font-size:.98rem;
  line-height:1.5;
  color:var(--fp-ink);
  transition:color .2s var(--fp-ease);
}
.page-about .about-principle__summary::-webkit-details-marker{
  display:none;
}
.page-about .about-principle__summary::after{
  content:"+";
  margin-left:auto;
  font-family:var(--fp-mono);
  color:var(--fp-crimson);
  font-size:1.05rem;
  line-height:1;
}
.page-about .about-principle[open] .about-principle__summary::after{
  content:"−";
}
.page-about .about-principle__summary:hover{
  color:var(--fp-crimson);
}
.page-about .about-principle__idx{
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--fp-gold);
  font-weight:700;
}
.page-about .about-principle__body{
  padding:0 2px 16px 32px;
}
.page-about .about-principle__body p{
  margin:0;
  font-size:.9rem;
  line-height:1.85;
  color:rgba(7,12,10,.74);
}

/* ---------- 03 栏目地图 ---------- */
.page-about .about-map{
  margin-top:24px;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:1px;
  background:var(--fp-line-soft);
  border:1px solid var(--fp-line-soft);
  border-radius:var(--fp-radius);
  overflow:hidden;
}
.page-about .about-map__item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  grid-template-areas:
    "num name"
    "brief brief"
    "clusters clusters";
  gap:4px 12px;
  padding:16px 16px 15px;
  background:var(--fp-ink);
  color:inherit;
  text-decoration:none;
  transition:background-color .3s var(--fp-ease),transform .3s var(--fp-ease);
}
.page-about .about-map__num{
  grid-area:num;
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--fp-gold);
  padding-top:3px;
}
.page-about .about-map__name{
  grid-area:name;
  font-family:var(--fp-serif);
  font-size:1.02rem;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--fp-ivory);
}
.page-about .about-map__brief{
  grid-area:brief;
  margin-top:4px;
  font-size:.82rem;
  line-height:1.7;
  color:rgba(243,235,221,.66);
}
.page-about .about-map__clusters{
  grid-area:clusters;
  margin-top:8px;
  font-family:var(--fp-mono);
  font-size:.68rem;
  line-height:1.6;
  letter-spacing:.04em;
  color:var(--fp-sage);
  border-top:1px dashed var(--fp-line-soft);
  padding-top:7px;
}
.page-about .about-map__item:hover,
.page-about .about-map__item:focus-visible{
  background:var(--fp-felt);
  outline:none;
}
.page-about .about-map__item:hover .about-map__name,
.page-about .about-map__item:focus-visible .about-map__name{
  color:var(--fp-gold-hi);
}
.page-about .about-map__item--current{
  background:linear-gradient(160deg,var(--fp-felt),var(--fp-ink));
}
.page-about .about-map__item--current .about-map__name::after{
  content:"· 当前";
  margin-left:6px;
  font-family:var(--fp-mono);
  font-size:.66rem;
  letter-spacing:.1em;
  color:var(--fp-gold);
}

/* ---------- 04 团队 ---------- */
.page-about .about-chapter--felt{
  background:linear-gradient(168deg,rgba(18,54,43,.92),rgba(11,31,24,.2));
  border-radius:var(--fp-radius);
  padding:30px 20px 28px;
  margin:26px 0;
  border-top:1px solid var(--fp-line);
}
.page-about .about-team{
  margin-top:24px;
  display:grid;
  gap:12px;
}
.page-about .about-team__card{
  padding:16px 16px 18px;
  border:1px solid var(--fp-line-soft);
  border-radius:var(--fp-radius);
  background:rgba(11,31,24,.55);
  transition:border-color .3s var(--fp-ease),transform .3s var(--fp-ease);
}
.page-about .about-team__card:hover{
  border-color:var(--fp-line);
  transform:translateY(-2px);
}
.page-about .about-team__pip{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px;
  height:30px;
  border-radius:50%;
  border:1px solid var(--fp-gold);
  color:var(--fp-gold);
  font-size:.76rem;
  letter-spacing:.04em;
}
.page-about .about-team__title{
  margin:12px 0 8px;
  font-family:var(--fp-serif);
  font-size:1rem;
  color:var(--fp-ivory);
}
.page-about .about-team__card p{
  margin:0;
  font-size:.84rem;
  line-height:1.8;
  color:rgba(243,235,221,.7);
}
.page-about .about-flow{
  list-style:none;
  margin:24px 0 0;
  padding:0;
  display:grid;
  gap:10px;
  counter-reset:flow;
}
.page-about .about-flow__step{
  position:relative;
  padding:10px 0 10px 40px;
  font-size:.84rem;
  line-height:1.7;
  color:rgba(243,235,221,.78);
  border-left:1px solid var(--fp-line);
}
.page-about .about-flow__step:last-child{
  border-left-color:transparent;
}
.page-about .about-flow__idx{
  position:absolute;
  left:-11px;
  top:10px;
  width:22px;
  height:22px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:var(--fp-gold);
  color:var(--fp-ink);
  font-size:.7rem;
  font-weight:700;
}

/* ---------- 05 版本节奏 ---------- */
.page-about .about-cadence{
  margin-top:24px;
  display:grid;
  gap:22px;
}
.page-about .about-track{
  list-style:none;
  margin:0;
  padding:0 0 0 18px;
  border-left:1px solid var(--about-track-line);
  display:grid;
  gap:20px;
}
.page-about .about-track__item{
  position:relative;
}
.page-about .about-track__item::before{
  content:"";
  position:absolute;
  left:-24px;
  top:6px;
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--fp-paper);
  border:2px solid var(--fp-gold);
}
.page-about .about-track__tag{
  display:inline-block;
  font-size:.64rem;
  letter-spacing:.16em;
  color:var(--fp-crimson);
  border:1px solid rgba(122,42,42,.34);
  border-radius:3px;
  padding:2px 6px;
}
.page-about .about-track__title{
  margin:8px 0 6px;
  font-family:var(--fp-serif);
  font-size:1.02rem;
  color:var(--fp-ink);
}
.page-about .about-track__item p{
  margin:0;
  font-size:.87rem;
  line-height:1.82;
  color:rgba(7,12,10,.72);
}

/* ---------- 06 适合谁 ---------- */
.page-about .about-who{
  margin-top:24px;
  display:grid;
  gap:12px;
}
.page-about .about-who__card{
  padding:18px 16px 16px;
  border:1px solid var(--fp-line-soft);
  border-top:2px solid var(--fp-gold);
  border-radius:0 0 var(--fp-radius) var(--fp-radius);
  background:rgba(18,54,43,.42);
  display:flex;
  flex-direction:column;
  gap:8px;
}
.page-about .about-who__title{
  margin:0;
  font-family:var(--fp-serif);
  font-size:1rem;
  color:var(--fp-ivory);
}
.page-about .about-who__card p{
  margin:0;
  font-size:.85rem;
  line-height:1.82;
  color:rgba(243,235,221,.72);
}
.page-about .about-who__link{
  margin-top:4px;
  align-self:flex-start;
  font-size:.8rem;
  letter-spacing:.04em;
  color:var(--fp-gold);
  text-decoration:none;
  border-bottom:1px solid var(--fp-line);
  padding-bottom:2px;
  transition:color .25s var(--fp-ease),border-color .25s var(--fp-ease);
}
.page-about .about-who__link:hover,
.page-about .about-who__link:focus-visible{
  color:var(--fp-gold-hi);
  border-color:var(--fp-gold-hi);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta{
  margin-top:34px;
  padding:28px 20px;
  border-radius:var(--fp-radius);
  background:linear-gradient(140deg,var(--fp-felt) 0%,var(--fp-ink) 78%);
  border:1px solid var(--fp-line);
}
.page-about .about-cta__title{
  margin:0 0 10px;
  font-family:var(--fp-serif);
  font-size:clamp(1.24rem,4.2vw,1.7rem);
  color:var(--fp-ivory);
}
.page-about .about-cta__text{
  margin:0 0 20px;
  max-width:56ch;
  font-size:.88rem;
  line-height:1.82;
  color:rgba(243,235,221,.74);
}
.page-about .about-cta__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}

/* ---------- 断点 ---------- */
@media (min-width:640px){
  .page-about .about-stats{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-about .about-map{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .about-team{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .about-who{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .about-sheet,
  .page-about .about-chapter--felt{
    padding:34px 30px 32px;
  }
  .page-about .about-cta{
    padding:34px 30px;
  }
}

@media (min-width:900px){
  .page-about .about-hero{
    padding-top:44px;
  }
  .page-about .about-hero__inner{
    grid-template-columns:1.02fr .98fr;
    align-items:center;
    gap:40px;
  }
  .page-about .about-hero__figure{
    border-radius:var(--fp-radius) 0 0 var(--fp-radius);
    border-bottom:1px solid var(--fp-line-soft);
    border-right:0;
  }
  .page-about .about-hero__img{
    height:clamp(300px,33vw,400px);
    border-radius:0;
  }
  .page-about .about-hero__figure{
    border-radius:0;
    border:0;
  }
  .page-about .about-hero__cap{
    background:linear-gradient(to top,rgba(7,12,10,.9),rgba(7,12,10,0));
    border-radius:0;
  }
  .page-about .about-body{
    grid-template-columns:minmax(0,1fr) 236px;
    gap:44px;
    padding-top:24px;
  }
  .page-about .about-side{
    order:0;
    top:calc(var(--fp-header-h) + 18px);
    align-self:start;
    padding:0;
    background:none;
  }
  .page-about .about-anchors{
    flex-direction:column;
    gap:2px;
    overflow:visible;
    padding:0;
    border-left:1px solid var(--fp-line-soft);
  }
  .page-about .about-anchors__label{
    display:block;
    padding:0 0 10px 14px;
  }
  .page-about .about-anchors__link{
    border:0;
    border-radius:0;
    border-left:2px solid transparent;
    padding:9px 12px 9px 14px;
    font-size:.82rem;
    white-space:normal;
  }
  .page-about .about-anchors__link:hover,
  .page-about .about-anchors__link:focus-visible{
    transform:translateX(3px);
    border-left-color:var(--fp-gold);
  }
  .page-about .about-anchors__link.is-active{
    background:rgba(201,162,75,.12);
    border-left-color:var(--fp-gold);
    color:var(--fp-gold-hi);
  }
  .page-about .about-chapter{
    padding:52px 0 46px;
  }
  .page-about .about-chapter__head{
    gap:26px;
  }
  .page-about .about-chapter__body{
    grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
    gap:30px;
    align-items:start;
    margin-top:28px;
  }
  .page-about .about-cadence{
    grid-template-columns:minmax(0,1fr) minmax(0,.9fr);
    gap:34px;
    align-items:start;
    margin-top:28px;
  }
  .page-about .about-who{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .page-about .about-map{
    grid-template-columns:repeat(4,minmax(0,1fr));
    margin-top:28px;
  }
  .page-about .about-map__item{
    padding:18px 16px 16px;
  }
  .page-about .about-team{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:14px;
  }
  .page-about .about-flow{
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:0 24px;
  }
  .page-about .about-sheet,
  .page-about .about-chapter--felt{
    padding:40px 40px 38px;
    margin:34px 0;
  }
}

@media (min-width:1180px){
  .page-about .about-map{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-about .about-team{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-about .about-flow{
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:0 18px;
  }
}

@media (prefers-reduced-motion:reduce){
  .page-about .about-anchors__link,
  .page-about .about-map__item,
  .page-about .about-team__card,
  .page-about .about-who__link{
    transition:none;
  }
  .page-about .about-map__item:hover,
  .page-about .about-team__card:hover,
  .page-about .about-anchors__link:hover{
    transform:none;
  }
}

@media print{
  .page-about .about-side,
  .page-about .about-crumbs,
  .page-about .about-cta__actions{
    display:none;
  }
  .page-about{
    background:#fff;
    color:#070C0A;
  }
  .page-about .about-hero::before,
  .page-about .about-hero::after{
    display:none;
  }
  .page-about .about-hero,
  .page-about .about-chapter--felt,
  .page-about .about-cta{
    background:#fff;
    color:#070C0A;
    border-color:rgba(7,12,10,.2);
  }
  .page-about .about-hero__title,
  .page-about .about-chapter__title,
  .page-about .about-team__title,
  .page-about .about-who__title,
  .page-about .about-cta__title,
  .page-about .about-map__name{
    color:#070C0A;
  }
  .page-about .about-hero__lede,
  .page-about .about-chapter__lede,
  .page-about .about-prose p,
  .page-about .about-map__brief,
  .page-about .about-team__card p,
  .page-about .about-who__card p,
  .page-about .about-cta__text{
    color:#12362B;
  }
  .page-about .about-map__item,
  .page-about .about-who__card,
  .page-about .about-team__card{
    background:#fff;
    border-color:rgba(7,12,10,.22);
  }
  .page-about .about-principle__body{
    display:block;
  }
}
<<<END>>>