.page-about{
  --ab-panel: #12233D;
  --ab-gap: clamp(22px, 4vw, 52px);
  --ab-rule: rgba(30, 58, 95, .9);
  --ab-soft: rgba(159, 176, 196, .14);
  position: relative;
  overflow-x: hidden;
  color: var(--paper);
  background-color: var(--abyss);
  background-image:
    repeating-linear-gradient(0deg, rgba(159, 176, 196, .045) 0 1px, transparent 1px 92px),
    radial-gradient(130% 70% at 4% -4%, rgba(53, 214, 208, .09), transparent 58%),
    radial-gradient(100% 55% at 100% 3%, rgba(201, 162, 75, .10), transparent 62%);
  background-repeat: repeat, no-repeat, no-repeat;
  padding-block: clamp(18px, 4vw, 40px) clamp(56px, 9vw, 120px);
}

.page-about .ab-crumb{
  position: relative;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mute);
  padding-block: 6px 10px;
}
.page-about .ab-crumb a{ color: var(--neon); text-decoration: none; }
.page-about .ab-crumb a:hover{ color: var(--gold-lit); }
.page-about .ab-crumb .crumb-sep{ margin-inline: 8px; color: item(--line); color: var(--line); }
.page-about .ab-crumb [aria-current="page"]{ color: var(--gold); }

/* ---------- 封面 ---------- */
.page-about .ab-cover{
  position: relative;
  z-index: 1;
  padding-top: clamp(20px, 4vw, 44px);
}
.page-about .ab-cover-grid{
  display: grid;
  gap: var(--ab-gap);
  align-items: end;
}
.page-about .ab-cover-text{
  max-width: 40rem;
  border-top: 1px solid var(--ab-rule);
  padding-top: clamp(18px, 3vw, 28px);
}
.page-about .ab-cover h1{
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(32px, 5.4vw, 62px);
  line-height: 1.16;
  letter-spacing: -.02em;
  margin: 12px 0 0;
  color: var(--paper);
}
.page-about .ab-lede{
  margin: 18px 0 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.9;
  color: var(--paper);
  max-width: 34em;
}
.page-about .ab-lede--quiet{
  font-size: 15px;
  color: var(--mute);
  border-left: 2px solid var(--neon-deep);
  padding-left: 14px;
}
.page-about .ab-cover-index{
  background: linear-gradient(180deg, var(--ab-panel), rgba(18, 35, 61, .5));
  border: 1px solid var(--ab-rule);
  clip-path: var(--cut-path);
  padding: 20px 20px 14px;
}
.page-about .ab-index-list{
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}
.page-about .ab-index-row{
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--ab-rule);
  font-size: 14px;
}
.page-about .ab-index-row:last-child{ border-bottom: 0; }
.page-about .ab-index-label{ color: var(--mute); }
.page-about .ab-index-num{
  color: var(--gold-lit);
  font-size: 14px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ---------- 章节通用 ---------- */
.page-about .ab-section{
  position: relative;
  z-index: 1;
  padding-top: clamp(52px, 8vw, 104px);
}
.page-about .ab-sec-head{
  display: grid;
  gap: 10px;
  max-width: 44rem;
  margin-bottom: clamp(24px, 4vw, 44px);
}
.page-about .ab-sec-num{
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .ab-sec-num::after{
  content: "";
  flex: 1 1 auto;
  max-width: 120px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
}
.page-about .ab-sec-lede{
  margin: 0;
  color: var(--mute);
  font-size: 16px;
  line-height: 1.85;
  max-width: 34em;
}
.page-about .ab-sub-title{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2vw, 22px);
  letter-spacing: -.01em;
  margin: 0 0 16px;
  color: var(--paper);
}
.page-about .ab-cap{
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--mute);
}
.page-about .ab-figure{
  position: relative;
  margin: 0;
  border: 1px solid rgba(201, 162, 75, .45);
  background: var(--ab-panel);
}
.page-about .ab-figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.9);
}
.page-about .ab-inline-note{
  margin: 24px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mute);
  border-left: 2px solid var(--gold);
  padding-left: 14px;
}
.page-about .ab-inline-note a{
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 214, 208, .4);
}
.page-about .ab-inline-note a:hover{ color: var(--gold-lit); border-bottom-color: var(--gold-lit); }

/* ---------- 01 缘起 ---------- */
.page-about .ab-origin{
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}
.page-about .ab-origin-body p{
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.9;
  color: var(--paper);
  max-width: 34em;
}
.page-about .ab-origin-body p:last-of-type{ margin-bottom: 0; }
.page-about .ab-origin-body .ab-inline-note{ color: var(--mute); }
.page-about .ab-figure--origin{
  clip-path: var(--cut-path);
}
.page-about .ab-figure--origin::after{
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 21, 38, .05), rgba(10, 21, 38, .5));
  pointer-events: none;
}

/* ---------- 02 三条线 ---------- */
.page-about .ab-lines{
  display: grid;
  gap: 16px;
}
.page-about .ab-line{
  background: var(--ab-panel);
  border: 1px solid var(--ab-rule);
  clip-path: var(--cut-path);
  padding: 22px 20px;
  display: grid;
  gap: 10px;
  align-content: start;
  transition: border-color .22s var(--ease), background .22s var(--ease);
}
.page-about .ab-line:hover{
  border-color: var(--neon);
  background: linear-gradient(180deg, rgba(15, 110, 107, .22), var(--ab-panel));
}
.page-about .ab-line-tag{
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}
.page-about .ab-line-title{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.2vw, 26px);
  margin: 0;
  color: var(--paper);
}
.page-about .ab-line-text{
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mute);
}
.page-about .ab-line-facts{
  margin: 6px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--ab-rule);
  display: grid;
  gap: 8px;
}
.page-about .ab-fact{
  display: grid;
  grid-template-columns: 4.6em minmax(0, 1fr);
  gap: 10px;
  font-size: 13px;
  line-height: 1.7;
}
.page-about .ab-fact dt{
  color: var(--gold);
  letter-spacing: .08em;
}
.page-about .ab-fact dd{ margin: 0; color: var(--paper); }

.page-about .ab-crew-zone{ margin-top: clamp(26px, 4vw, 46px); }
.page-about .ab-filter{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.page-about .ab-crew{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .ab-crew-card{
  position: relative;
  background: rgba(18, 35, 61, .72);
  border: 1px solid var(--ab-rule);
  clip-path: var(--cut-path);
  padding: 18px 18px 16px;
  display: grid;
  gap: 6px;
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}
.page-about .ab-crew-card:hover,
.page-about .ab-crew-card:focus-within{
  border-color: var(--neon);
  transform: translateY(-3px);
}
.page-about .ab-crew-num{
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}
.page-about .ab-crew-role{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  margin: 0;
  color: var(--paper);
}
.page-about .ab-crew-line{
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mute);
}
.page-about .ab-crew-out{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--neon);
  border-top: 1px dashed var(--ab-rule);
  padding-top: 10px;
  margin-top: 4px;
}
.page-about .ab-empty{
  margin: 18px 0 0;
  font-size: 14px;
  color: var(--mute);
  border: 1px dashed var(--line);
  padding: 14px;
}

/* ---------- 03 时间轴 ---------- */
.page-about .ab-tl-jump{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(22px, 3vw, 34px);
}
.page-about .ab-tl-jump a{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-decoration: none;
  color: var(--mute);
  border: 1px solid var(--ab-rule);
  border-radius: 999px;
  padding: 7px 14px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .ab-tl-jump a:hover{
  color: var(--neon);
  border-color: var(--neon);
}
.page-about .ab-tl{
  list-style: none;
  margin: 0;
  padding: 0 0 0 24px;
  position: relative;
}
.page-about .ab-tl::before{
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), var(--line) 45%, var(--neon-deep));
}
.page-about .ab-tl-item{
  position: relative;
  padding-bottom: clamp(26px, 4vw, 44px);
}
.page-about .ab-tl-item:last-child{ padding-bottom: 0; }
.page-about .ab-tl-item::before{
  content: "";
  position: absolute;
  left: -24px;
  top: 8px;
  width: 12px;
  height: 12px;
  border: 1.5px solid var(--gold);
  border-radius: 50%;
  background: var(--abyss);
  box-shadow: 0 0 0 3px rgba(10, 21, 38, .9);
}
.page-about .ab-tl-year{
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--gold-lit);
}
.page-about .ab-tl-card{
  background: var(--ab-panel);
  border: 1px solid var(--ab-rule);
  border-left: 2px solid var(--gold);
  clip-path: var(--cut-path);
  padding: 20px 20px 18px;
}
.page-about .ab-tl-title{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.1vw, 24px);
  margin: 0 0 14px;
  color: var(--paper);
}
.page-about .ab-tl-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.page-about .ab-tl-node{
  display: grid;
  grid-template-columns: 4.2em minmax(0, 1fr);
  gap: 12px;
  font-size: 15px;
  line-height: 1.8;
  padding-bottom: 9px;
  border-bottom: 1px dotted var(--ab-soft);
}
.page-about .ab-tl-node:last-child{ border-bottom: 0; padding-bottom: 0; }
.page-about .ab-tl-node-year{
  color: var(--neon);
  font-size: 13px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.page-about .ab-tl-node-text{ color: var(--paper); }
.page-about .ab-figure--tl{
  margin-top: clamp(26px, 4vw, 46px);
  clip-path: var(--cut-path);
}

/* ---------- 04 进档案 ---------- */
.page-about .ab-intake{
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}
.page-about .ab-fields{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-soft);
  border: 1px solid var(--ab-rule);
}
.page-about .ab-field{
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  gap: 4px 12px;
  background: var(--abyss);
  padding: 12px 14px;
  align-items: baseline;
}
.page-about .ab-field-num{
  font-size: 12px;
  color: var(--gold);
  letter-spacing: .12em;
}
.page-about .ab-field-name{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  color: var(--paper);
}
.page-about .ab-field-desc{
  grid-column: 2;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
}
.page-about .ab-figure--intake{ clip-path: var(--cut-path); }

.page-about .ab-steps{
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: step;
}
.page-about .ab-step{
  position: relative;
  border-top: 1px solid var(--ab-rule);
  padding-top: 16px;
}
.page-about .ab-step::before{
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 34px;
  height: 2px;
  background: var(--neon);
}
.page-about .ab-step-num{
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--neon);
}
.page-about .ab-step-title{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  margin: 8px 0 6px;
  color: var(--paper);
}
.page-about .ab-step p{
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
}

/* ---------- 05 偏好榜 ---------- */
.page-about .ab-rank{
  display: grid;
  gap: 12px;
}
.page-about .ab-rank-row{
  display: grid;
  grid-template-columns: 3.2em minmax(0, 1fr);
  gap: 6px 16px;
  align-items: start;
  background: linear-gradient(90deg, rgba(18, 35, 61, .9), rgba(18, 35, 61, .55));
  border: 1px solid var(--ab-rule);
  border-left: 2px solid var(--line);
  clip-path: var(--cut-path);
  padding: 18px 18px 16px;
}
.page-about .ab-rank-row--lead{ border-left-color: var(--gold); }
.page-about .ab-rank-order{
  font-size: 22px;
  line-height: 1;
  color: var(--gold-lit);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-rank-body{ min-width: 0; }
.page-about .ab-rank-city{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  margin: 0 0 8px;
  color: var(--paper);
}
.page-about .ab-rank-note{
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mute);
  max-width: 34em;
}
.page-about .ab-rank-tag{
  grid-column: 2;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--neon);
}
.page-about .ab-rank-foot{
  margin-top: clamp(20px, 3vw, 32px);
  display: grid;
  gap: 12px;
  max-width: 46rem;
}
.page-about .ab-rank-foot p{
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mute);
}
.page-about .ab-rank-foot a{
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 214, 208, .4);
}
.page-about .ab-rank-foot a:hover{ color: var(--gold-lit); border-bottom-color: var(--gold-lit); }

/* ---------- 06 三条坚持 ---------- */
.page-about .ab-rules{
  display: grid;
  gap: 16px;
}
.page-about .ab-rule{
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid var(--ab-rule);
  background: rgba(10, 21, 38, .6);
  clip-path: var(--cut-path);
}
.page-about .ab-rule-num{
  display: block;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cinnabar);
  margin-bottom: 10px;
}
.page-about .ab-rule-title{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 1.9vw, 21px);
  margin: 0 0 8px;
  color: var(--paper);
}
.page-about .ab-rule p{
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mute);
}

/* ---------- CTA ---------- */
.page-about .ab-cta{ padding-bottom: clamp(10px, 2vw, 24px); }
.page-about .ab-cta-card{
  display: grid;
  gap: 22px;
  border: 1px solid rgba(201, 162, 75, .5);
  background: linear-gradient(120deg, rgba(15, 110, 107, .28), rgba(18, 35, 61, .95) 58%);
  clip-path: var(--cut-path);
  padding: clamp(22px, 4vw, 40px);
}
.page-about .ab-cta-title{
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.25;
  letter-spacing: -.02em;
  margin: 10px 0 0;
  color: var(--paper);
  max-width: 22em;
}
.page-about .ab-cta-note{
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mute);
  max-width: 34em;
}
.page-about .ab-cta-links{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px){
  .page-about .ab-crew{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .ab-steps{ grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
  .page-about .ab-fields{ grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; }
}

@media (min-width: 900px){
  .page-about .ab-cover-grid{
    grid-template-columns: minmax(0, 7fr) minmax(240px, 3fr);
  }
  .page-about .ab-origin{
    grid-template-columns: minmax(0, 6fr) minmax(260px, 4fr);
  }
  .page-about .ab-figure--origin{
    margin-top: 36px;
    margin-right: calc(-1 * var(--gutter) / 3);
  }
  .page-about .ab-lines{
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .96fr) minmax(0, 1.02fr);
    gap: 18px;
    align-items: start;
  }
  .page-about .ab-line--a{ transform: translateY(0); }
  .page-about .ab-line--b{ transform: translateY(26px); }
  .page-about .ab-line--c{ transform: translateY(10px); }
  .page-about .ab-intake{
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
  }
  .page-about .ab-rules{
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .95fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .ab-rule:nth-child(2){ margin-top: 28px; }
  .page-about .ab-cta-card{
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: center;
  }
  .page-about .ab-cta-links{ justify-content: flex-end; }
}

@media (min-width: 1024px){
  .page-about .ab-crew{ grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .ab-crew-card:nth-child(2){ margin-top: 18px; }
  .page-about .ab-crew-card:nth-child(5){ margin-top: 18px; }
  .page-about .ab-steps{ grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-about .ab-fields{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .ab-figure--tl{
    margin-right: calc(-1 * var(--gutter) / 2);
  }
}

@media (hover: none){
  .page-about .ab-crew-card:hover{ transform: none; }
}

@media (prefers-reduced-motion: reduce){
  .page-about *{
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
  .page-about .ab-line--a,
  .page-about .ab-line--b,
  .page-about .ab-line--c,
  .page-about .ab-crew-card:nth-child(2),
  .page-about .ab-crew-card:nth-child(5),
  .page-about .ab-figure--origin,
  .page-about .ab-figure--tl,
  .page-about .ab-rule:nth-child(2){
    transform: none;
    margin-top: 0;
  }
}
</>