.page-about{
  --about-hair: rgba(199,161,90,.45);
  --about-hair-soft: rgba(199,161,90,.22);
  --about-dark-soft: #0E2632;
  --about-body: #2A3B45;
  background: var(--ice-050);
  color: var(--ink-900);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .container{
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about h1,
.page-about h2,
.page-about h3{
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0;
}

.page-about h2{
  font-size: clamp(26px, 4.6vw, 46px);
  line-height: 1.06;
  margin-bottom: 14px;
}

.page-about h3{
  font-size: clamp(19px, 2.3vw, 24px);
  line-height: 1.2;
}

.page-about p{
  margin: 0 0 14px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--about-body);
}

.page-about .kicker{
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--sand-500);
  text-transform: uppercase;
}

.page-about .kicker::before{
  content: "";
  width: 30px;
  height: 2px;
  background: var(--sand-500);
  flex: none;
}

.page-about .kicker--lime{
  color: var(--lime);
}

.page-about .kicker--lime::before{
  background: var(--lime);
}

.page-about .sec-head{
  max-width: 46em;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-about .sec-lead{
  font-size: clamp(15px, 1.7vw, 18px);
  max-width: 40em;
}

.page-about .sec-head--dark h2{
  color: var(--ice-050);
}

.page-about .sec-head--dark .sec-lead{
  color: rgba(217,241,242,.76);
}

/* 锚点定位时留出头部空间 */
.page-about [id]{
  scroll-margin-top: 120px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position: relative;
  padding: clamp(18px, 3vw, 34px) 0 clamp(46px, 6vw, 84px);
  color: var(--ice-050);
  background:
    radial-gradient(115% 90% at 92% -10%, rgba(124,77,255,.42), transparent 62%),
    radial-gradient(80% 70% at 0% 110%, rgba(184,255,59,.16), transparent 58%),
    var(--ink-900);
}

.page-about .about-hero .breadcrumb-list{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  list-style: none;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-about .about-hero .breadcrumb-item + .breadcrumb-item::before{
  content: "/";
  margin-right: 10px;
  color: rgba(217,241,242,.4);
}

.page-about .about-hero .breadcrumb-link{
  color: rgba(217,241,242,.66);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-hero .breadcrumb-link:hover,
.page-about .about-hero .breadcrumb-link:focus-visible{
  color: var(--lime);
  border-color: var(--lime);
}

.page-about .about-hero .breadcrumb-current{
  color: var(--sand-200);
}

.page-about .hero-frame{
  position: relative;
  border: 2px solid var(--sand-500);
  padding: clamp(22px, 4vw, 48px);
  background: linear-gradient(158deg, rgba(14,38,50,.94), rgba(7,21,28,.82));
  box-shadow: 10px 10px 0 rgba(199,161,90,.2);
}

.page-about .hero-frame::after{
  content: "";
  position: absolute;
  top: -2px;
  right: -2px;
  width: 42px;
  height: 42px;
  border-top: 2px solid var(--lime);
  border-right: 2px solid var(--lime);
  pointer-events: none;
}

.page-about .hero-eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--sand-200);
}

.page-about .hero-dot{
  width: 8px;
  height: 8px;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(184,255,59,.16);
  flex: none;
}

.page-about .hero-title{
  font-size: clamp(34px, 7vw, 78px);
  line-height: .98;
  color: var(--ice-050);
  margin-bottom: clamp(16px, 2.4vw, 26px);
  max-width: 20em;
}

.page-about .hero-lead{
  max-width: 42em;
  color: rgba(230,245,244,.84);
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.82;
}

.page-about .hero-jumps{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-about .jump-chip{
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid rgba(199,161,90,.55);
  color: var(--ice-100);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-decoration: none;
  background: rgba(217,241,242,.05);
  transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
}

.page-about .jump-chip:hover,
.page-about .jump-chip:focus-visible{
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink-900);
  transform: translateY(-2px);
}

/* ---------- 起点 ---------- */
.page-about .about-origin{
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--ice-050);
}

.page-about .origin-grid{
  display: grid;
  gap: clamp(24px, 3.4vw, 48px);
}

.page-about .origin-copy p{
  max-width: 38em;
}

.page-about .origin-note{
  margin-top: 10px;
  padding-left: 16px;
  border-left: 3px solid var(--sand-500);
  color: var(--slate-700);
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 21px) !important;
  line-height: 1.55 !important;
}

.page-about .origin-figure{
  margin: 0;
}

.page-about .media-frame{
  position: relative;
  overflow: hidden;
  border: 2px solid var(--ink-900);
  background: var(--slate-700);
  box-shadow: 8px 8px 0 rgba(7,21,28,.16);
}

.page-about .media-frame img{
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame--16x9{ aspect-ratio: 16 / 9; }
.page-about .media-frame--4x5{ aspect-ratio: 4 / 5; }

.page-about .media-caption{
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--slate-500);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline{
  padding: clamp(44px, 6vw, 88px) 0;
  color: var(--ice-050);
  background:
    linear-gradient(180deg, rgba(7,21,28,.96), var(--ink-800) 55%, rgba(11,31,41,.98));
}

.page-about .year-rail{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 0 clamp(20px, 2.6vw, 30px);
  border-top: 1px solid rgba(199,161,90,.35);
  border-bottom: 1px solid rgba(199,161,90,.35);
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .year-chip{
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  padding: 6px 12px;
  color: var(--sand-200);
  text-decoration: none;
  border: 1px solid rgba(199,161,90,.4);
  transition: color var(--ease), background var(--ease), border-color var(--ease);
}

.page-about .year-chip:hover,
.page-about .year-chip:focus-visible{
  background: var(--sand-500);
  border-color: var(--sand-500);
  color: var(--ink-900);
}

.page-about .timeline{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.4vw, 26px);
}

.page-about .tl-item{
  position: relative;
  padding: 18px 0 0;
  border-top: 2px solid rgba(199,161,90,.5);
}

.page-about .tl-item::before{
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 8px;
  height: 8px;
  background: var(--lime);
}

.page-about .tl-year{
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  color: var(--sand-200);
  margin: 0 0 10px;
  letter-spacing: .02em;
}

.page-about .tl-title{
  color: var(--ice-050);
  margin-bottom: 8px;
}

.page-about .tl-text{
  color: rgba(217,241,242,.76);
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
}

/* ---------- 覆盖 ---------- */
.page-about .about-coverage{
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--ice-100);
}

.page-about .coverage-grid{
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .stat-grid{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 22px);
}

.page-about .stat{
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px 20px;
  border: 2px solid var(--ink-900);
  background: var(--ice-050);
  box-shadow: 6px 6px 0 rgba(7,21,28,.14);
}

.page-about .stat-num{
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1;
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -.02em;
}

.page-about .stat-num small{
  font-size: .38em;
  letter-spacing: 0;
  margin-left: 4px;
  color: var(--slate-500);
}

.page-about .stat-label{
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--slate-700);
}

.page-about .rhythm{
  padding: clamp(20px, 3vw, 30px);
  border: 2px solid var(--ink-900);
  background: var(--ink-900);
  color: var(--ice-050);
  box-shadow: 8px 8px 0 rgba(124,77,255,.28);
}

.page-about .rhythm-title{
  color: var(--ice-050);
  margin-bottom: 16px;
}

.page-about .rhythm-list{
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .rhythm-list li{
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 12px;
  align-items: start;
  padding-bottom: 14px;
  border-bottom: 1px dashed rgba(199,161,90,.35);
}

.page-about .rhythm-list li:last-child{
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .rhythm-time{
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--lime);
  padding-top: 3px;
}

.page-about .rhythm-list p{
  margin: 0;
  color: rgba(217,241,242,.82);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .coverage-figure{
  margin: 6px 0 0;
}

.page-about .coverage-figure .media-frame{
  border-color: var(--sand-500);
  box-shadow: 6px 6px 0 rgba(199,161,90,.24);
}

.page-about .coverage-figure .media-caption{
  color: rgba(217,241,242,.62);
}

/* ---------- 团队 ---------- */
.page-about .about-team{
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--ice-050);
}

.page-about .team-grid{
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  margin-bottom: clamp(30px, 4vw, 50px);
}

.page-about .team-copy p{
  max-width: 36em;
}

.page-about .role-list{
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .role-list li{
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 12px 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .role-num{
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--violet);
  font-weight: 700;
}

.page-about .role-text{
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate-700);
}

.page-about .team-figure{
  margin: 0;
}

.page-about .flow{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--about-hair-soft);
  border: 2px solid var(--ink-900);
}

.page-about .flow-step{
  padding: 20px 18px;
  background: var(--ice-050);
}

.page-about .flow-index{
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--sand-500);
  margin-bottom: 8px;
}

.page-about .flow-step h3{
  font-size: 19px;
  margin-bottom: 6px;
}

.page-about .flow-step p{
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-700);
}

/* ---------- 方法 ---------- */
.page-about .about-method{
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--ice-100);
}

.page-about .method-grid{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

.page-about .method-card{
  position: relative;
  padding: 24px 20px 22px;
  background: var(--ice-050);
  border: 2px solid var(--ink-900);
  box-shadow: 6px 6px 0 rgba(7,21,28,.14);
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}

.page-about .method-card:hover{
  transform: translate(-2px, -2px);
  box-shadow: 10px 10px 0 rgba(124,77,255,.32);
  border-color: var(--violet);
}

.page-about .method-index{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ice-050);
  background: var(--ink-900);
  padding: 4px 8px;
  margin-bottom: 14px;
}

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

.page-about .method-card p{
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate-700);
}

.page-about .method-foot{
  margin-top: clamp(22px, 3vw, 32px);
  font-size: 15px;
  color: var(--slate-700);
}

.page-about .method-foot a{
  color: var(--violet-700);
  text-decoration: none;
  border-bottom: 2px solid rgba(124,77,255,.35);
  transition: border-color var(--ease), color var(--ease);
}

.page-about .method-foot a:hover,
.page-about .method-foot a:focus-visible{
  color: var(--ink-900);
  border-color: var(--lime);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners{
  padding: clamp(44px, 6vw, 88px) 0;
  color: var(--ice-050);
  background:
    radial-gradient(90% 80% at 100% 0%, rgba(124,77,255,.28), transparent 60%),
    var(--ink-900);
}

.page-about .partner-grid{
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .partner-card{
  padding: 24px 20px;
  border: 2px solid rgba(199,161,90,.5);
  background: rgba(217,241,242,.05);
}

.page-about .partner-count{
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.6vw, 46px);
  line-height: 1;
  margin: 0 0 10px;
  color: var(--lime);
}

.page-about .partner-count small{
  font-size: .34em;
  margin-left: 6px;
  color: var(--sand-200);
}

.page-about .partner-card h3{
  color: var(--ice-050);
  margin-bottom: 8px;
}

.page-about .partner-card p{
  color: rgba(217,241,242,.78);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .tag-row{
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .tag-row .tag{
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  padding: 5px 10px;
  border: 1px solid rgba(217,241,242,.32);
  color: var(--ice-100);
  background: transparent;
}

.page-about .tag-row .tag--sand{
  border-color: var(--sand-500);
  color: var(--sand-200);
}

.page-about .audience{
  margin-top: clamp(26px, 3.4vw, 40px);
  padding-top: 22px;
  border-top: 1px solid rgba(199,161,90,.35);
}

.page-about .audience-title{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--sand-200);
  margin-bottom: 14px;
}

.page-about .audience-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .audience-list li{
  padding: 8px 14px;
  font-size: 14px;
  color: var(--ice-050);
  border-left: 3px solid var(--violet);
  background: rgba(124,77,255,.16);
}

/* ---------- 理由与行动 ---------- */
.page-about .about-why{
  padding: clamp(44px, 6vw, 88px) 0;
  color: var(--ice-050);
  background:
    linear-gradient(140deg, rgba(7,21,28,.99), rgba(14,38,50,.96) 48%, rgba(90,47,209,.55));
}

.page-about .reason-grid{
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.2vw, 22px);
}

.page-about .reason{
  padding: 20px 0 0;
  border-top: 2px solid rgba(184,255,59,.45);
}

.page-about .reason h3{
  color: var(--ice-050);
  margin-bottom: 8px;
}

.page-about .reason p{
  margin: 0;
  color: rgba(217,241,242,.8);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-cta{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: clamp(20px, 2.6vw, 30px);
  border-top: 1px solid rgba(199,161,90,.35);
}

.page-about .about-cta .btn{
  font-size: 14px;
  padding: 12px 22px;
  text-decoration: none;
}

.page-about .about-cta .btn--ghost{
  color: var(--ice-050);
  border: 2px solid rgba(217,241,242,.4);
  background: transparent;
}

.page-about .about-cta .btn--ghost:hover,
.page-about .about-cta .btn--ghost:focus-visible{
  border-color: var(--lime);
  color: var(--lime);
}

.page-about a:focus-visible,
.page-about .method-card:focus-within{
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px){
  .page-about .stat-grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .flow{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .method-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .partner-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .reason-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px){
  .page-about .hero-frame{
    display: grid;
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 56px);
    align-items: end;
  }

  .page-about .hero-eyebrow,
  .page-about .hero-title{
    grid-column: 1 / 2;
  }

  .page-about .hero-lead{
    grid-column: 2 / 3;
    grid-row: 1 / 3;
    align-self: end;
    border-left: 2px solid rgba(199,161,90,.5);
    padding-left: clamp(18px, 2vw, 26px);
  }

  .page-about .hero-jumps{
    grid-column: 1 / -1;
  }

  .page-about .origin-grid{
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }

  .page-about .timeline{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .tl-year{
    font-size: 34px;
  }

  .page-about .coverage-grid{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .team-grid{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .flow{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .method-grid{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .partner-grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .reason-grid{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1200px){
  .page-about .hero-title{
    font-size: clamp(56px, 5.6vw, 82px);
  }

  .page-about .method-grid{
    gap: 26px;
  }
}

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

  .page-about .jump-chip:hover,
  .page-about .method-card:hover{
    transform: none;
  }
}
<<<END>>>