.page-about{
  --about-line: rgba(8,27,22,.16);
  --about-line-soft: rgba(8,27,22,.09);
  --about-ink-2: #1E3A32;
  --about-muted: #4E6E64;
  --about-num: #8CA79E;
  --about-live: #0B7A5E;
  --about-pad: clamp(22px, 3.4vw, 56px);
  --about-stack-gap: clamp(44px, 7vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding-block: clamp(18px, 3vw, 34px) clamp(34px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
}
.page-about .about-hero__text{ min-width: 0; }
.page-about .about-hero .page-head__title{
  max-width: 18ch;
  line-height: .98;
}
.page-about .about-hero .page-head__lede{
  max-width: 34em;
  margin-top: clamp(14px, 2vw, 22px);
}

.page-about .about-hero__facts{
  list-style: none;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.page-about .about-fact{
  background: var(--ink);
  padding: 14px 12px 12px;
  min-width: 0;
}
.page-about .about-fact__num{
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.6vw, 30px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--cyan);
  line-height: 1.1;
}
.page-about .about-fact__label{
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--moss);
  line-height: 1.4;
}

.page-about .about-hero__aside{
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  min-width: 0;
}
.page-about .about-hero__vertical{
  writing-mode: horizontal-tb;
  margin: 0;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--moss);
  font-family: var(--font-mono);
  text-transform: uppercase;
}
.page-about .about-hero__aside-note{
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan-soft);
  max-width: 22em;
}

@media (min-width: 640px){
  .page-about .about-hero__facts{ grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (min-width: 900px){
  .page-about .about-hero{
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    align-items: end;
    gap: clamp(24px, 4vw, 64px);
  }
  .page-about .about-hero__aside{
    border-top: 0;
    border-left: 1px solid var(--line);
    padding: 0 0 4px 20px;
    min-height: 240px;
    justify-content: space-between;
    align-items: flex-start;
  }
  .page-about .about-hero__vertical{
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .2em;
    height: 100%;
    align-self: flex-start;
  }
  .page-about .about-hero__aside-note{
    align-self: flex-end;
    text-align: right;
  }
}

/* ---------- 主体：左侧刻度 + 面板 ---------- */
.page-about .about-body{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  padding-block: clamp(30px, 5vw, 64px) clamp(44px, 7vw, 100px);
}

.page-about .about-scale{ min-width: 0; }
.page-about .about-scale__label{
  margin: 0;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--moss);
  font-family: var(--font-mono);
}
.page-about .about-scale__list{
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .about-scale__item{ min-width: 0; }
.page-about .about-scale__item a{
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 4px 12px;
  border: 1px solid var(--line);
  color: var(--moss);
  text-decoration: none;
  font-size: 11px;
  letter-spacing: .12em;
  transition: color .18s ease, border-color .18s ease;
}
.page-about .about-scale__item a:hover,
.page-about .about-scale__item a:focus-visible{
  color: var(--cyan);
  border-color: var(--cyan);
}
.page-about .about-scale__num{
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--cyan-soft);
}
.page-about .about-scale__word{
  writing-mode: horizontal-tb;
  font-size: 11px;
  letter-spacing: .12em;
}

.page-about .about-stack{ gap: var(--about-stack-gap); }

/* ---------- 浅砂面板 ---------- */
.page-about .about-panel{
  position: relative;
  background: var(--sand);
  color: var(--ink);
  padding: var(--about-pad);
  border-top: 2px solid var(--ink);
  min-width: 0;
  transition: transform .18s ease, box-shadow .18s ease;
}
.page-about .about-panel:hover{
  transform: translateY(-2px);
  box-shadow: 0 22px 46px rgba(0,0,0,.38);
}
.page-about .about-panel__num{
  position: absolute;
  top: -.42em;
  right: calc(var(--about-pad) * .7);
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(46px, 7.5vw, 96px);
  font-weight: 800;
  letter-spacing: -.05em;
  line-height: .82;
  color: var(--about-num);
  pointer-events: none;
  transition: color .3s ease;
}
.page-about .about-panel:hover .about-panel__num,
.page-about .about-panel.is-live .about-panel__num{
  color: var(--cyan);
}

.page-about .about-panel__head{
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-line);
  margin-bottom: clamp(18px, 2.6vw, 30px);
}
.page-about .about-panel .section-title{
  margin: 0;
  max-width: 20ch;
  color: var(--ink);
  font-size: clamp(21px, 3.1vw, 34px);
  line-height: 1.16;
  letter-spacing: -.02em;
}
.page-about .about-panel__meta{
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--about-muted);
  white-space: nowrap;
}

.page-about .about-panel__body{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 2.8vw, 34px);
  align-items: start;
}

.page-about .about-panel .prose{ max-width: 37em; }
.page-about .about-panel .prose p{
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--about-ink-2);
}
.page-about .about-panel .prose p:last-child{ margin-bottom: 0; }
.page-about .about-panel .prose a.link-underline{
  color: var(--ink);
  text-decoration-color: var(--about-muted);
}
.page-about .about-panel .prose a.link-underline:hover{
  color: var(--about-live);
  text-decoration-color: var(--about-live);
}
.page-about .about-prose--after{
  margin-top: clamp(18px, 2.6vw, 28px);
  padding-top: 14px;
  border-top: 1px dashed var(--about-line);
}

.page-about .about-figure{ margin: 0; }
.page-about .about-figure img{
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-panel .media-frame__caption{
  color: var(--about-muted);
  border-top: 1px solid var(--about-line-soft);
  padding-top: 8px;
  margin-top: 8px;
}

@media (min-width: 860px){
  .page-about .about-panel__body--split{
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .page-about .about-panel__body--aside-right{
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-panel__body--aside-left{
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

/* ---------- 结构示意 ---------- */
.page-about .about-layers-wrap{ min-width: 0; }
.page-about .about-layers{
  display: block;
  width: 100%;
  height: auto;
  max-width: 420px;
}
.page-about .about-layer__box{
  fill: none;
  stroke: #5D8277;
  stroke-width: 1;
  transition: stroke .2s ease, stroke-width .2s ease;
}
.page-about .about-layer__label{
  fill: #2E4C43;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
}
.page-about .about-layer:hover .about-layer__box{
  stroke: var(--about-live);
  stroke-width: 1.8;
}

/* ---------- 三层表格 ---------- */
.page-about .about-table-wrap{
  margin-top: clamp(20px, 3vw, 32px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-table{
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}
.page-about .about-table caption{
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--about-muted);
  padding-bottom: 8px;
}
.page-about .about-table th,
.page-about .about-table td{
  border: 1px solid var(--about-line);
  padding: 0 12px;
  height: 36px;
  text-align: left;
  vertical-align: middle;
  color: var(--about-ink-2);
}
.page-about .about-table th{
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--ink);
  background: rgba(8,27,22,.06);
}
.page-about .about-table td:first-child{
  font-family: var(--font-mono);
  color: var(--about-live);
  font-weight: 700;
  white-space: nowrap;
}

/* ---------- 版本条目 ---------- */
.page-about .about-timeline{
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}
.page-about .about-timeline li{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-line);
  transition: border-color .18s ease;
}
.page-about .about-timeline li:hover{ border-bottom-color: var(--about-live); }
.page-about .about-timeline__year{
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--about-live);
}
.page-about .about-timeline__text{
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-ink-2);
  max-width: 40em;
}
@media (min-width: 700px){
  .page-about .about-timeline li{
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-close{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line);
  padding: clamp(22px, 4vw, 44px);
  background:
    linear-gradient(135deg, rgba(79,243,200,.10), rgba(79,243,200,0) 62%),
    var(--panel);
}
.page-about .about-close__title{
  margin: 8px 0 10px;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--paper);
  max-width: 20ch;
}
.page-about .about-close__text{
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--moss);
  max-width: 34em;
}
.page-about .about-close__links{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
@media (min-width: 820px){
  .page-about .about-close{
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
  .page-about .about-close__links{ justify-content: flex-end; }
}

/* ---------- 桌面：竖排刻度导航 ---------- */
@media (min-width: 1000px){
  .page-about .about-body{
    grid-template-columns: 88px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 48px);
  }
  .page-about .about-scale{
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
    align-self: start;
  }
  .page-about .about-scale__list{
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 16px;
    margin-top: 14px;
  }
  .page-about .about-scale__item a{
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    border: 0;
    padding: 0;
    min-height: 0;
  }
  .page-about .about-scale__word{
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .2em;
    line-height: 1;
  }
  .page-about .about-scale__item a:hover .about-scale__word,
  .page-about .about-scale__item a:focus-visible .about-scale__word{
    color: var(--cyan);
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .about-panel,
  .page-about .about-panel__num,
  .page-about .about-scale__item a,
  .page-about .about-layer__box,
  .page-about .about-timeline li{
    transition: none;
  }
  .page-about .about-panel:hover{ transform: none; }
}
<<<END>>>