.page-about{
  --about-rail:210px;
  --about-step-pad:26px;
  color:var(--fog);
  padding-bottom:clamp(48px,7vw,96px);
}

.page-about .about-breadcrumb{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:20px var(--gutter) 0;
}
.page-about .breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin:0;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--slate);
}
.page-about .breadcrumb__item{display:flex;gap:8px;align-items:center;}
.page-about .breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--line);}
.page-about .breadcrumb__link{
  color:var(--slate);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible{color:var(--cyan);border-bottom-color:var(--cyan);}

/* 首屏 */
.page-about .about-hero{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(26px,4vw,52px) var(--gutter) 0;
}
.page-about .about-hero__grid{
  display:grid;
  gap:clamp(26px,4vw,40px);
}
.page-about .about-hero__title{
  margin:16px 0 0;
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(34px,7vw,78px);
  line-height:1.04;
  letter-spacing:-0.02em;
  color:var(--fog);
  max-width:16em;
}
.page-about .about-hero__lede{
  margin:20px 0 0;
  max-width:38em;
  font-size:clamp(15px,1.4vw,16.5px);
  line-height:1.8;
  color:var(--fog-dim);
}
.page-about .about-hero__stats{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line);
  align-self:end;
}
.page-about .about-stat{
  background:var(--ink-800);
  padding:16px 14px;
}
.page-about .about-stat__value{
  font-size:clamp(22px,3vw,28px);
  line-height:1;
  color:var(--cyan);
}
.page-about .about-stat__value--gold{color:var(--gold);}
.page-about .about-stat__value--magenta{color:var(--magenta);}
.page-about .about-stat__label{
  margin-top:8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--slate);
}

.page-about .about-banner{
  margin:clamp(26px,4vw,44px) 0 0;
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(45,226,230,.10),rgba(7,21,35,0) 55%),var(--ink-800);
  overflow:hidden;
}
.page-about .about-banner img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:14/6;
  object-fit:cover;
}

/* 主栅格：左轨道 + 右正文 */
.page-about .about-shell{
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(34px,5vw,64px) var(--gutter) 0;
  display:grid;
  gap:clamp(26px,4vw,44px);
}
.page-about .about-rail{
  border-top:1px solid var(--line);
  padding-top:14px;
}
.page-about .about-rail__label{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  color:var(--slate);
}
.page-about .about-rail__list{
  display:flex;
  flex-wrap:wrap;
  gap:8px 16px;
  margin:0;
  padding:0;
  list-style:none;
}
.page-about .about-rail__link{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  padding:4px 0;
  font-size:13px;
  color:var(--fog-dim);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.page-about .about-rail__num{
  font-size:11px;
  color:var(--cyan);
  opacity:.75;
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible{
  color:var(--fog);
  border-bottom-color:var(--gold);
}
.page-about .about-rail__top{
  display:inline-flex;
  margin-top:16px;
  padding:7px 12px;
  font-size:11px;
  letter-spacing:.14em;
}

/* 章节 */
.page-about .about-body{min-width:0;}
.page-about .about-chapter{
  padding-block:clamp(30px,4.5vw,52px);
  border-top:1px solid var(--line-soft);
  scroll-margin-top:132px;
}
.page-about .about-chapter:first-child{
  border-top:0;
  padding-top:0;
}
.page-about .about-chapter:target{
  border-top-color:var(--cyan);
}
.page-about .about-chapter__head{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin-bottom:18px;
}
.page-about .about-chapter__num{
  font-size:clamp(26px,3.6vw,40px);
  line-height:1;
  color:var(--cyan);
  opacity:.5;
}
.page-about .about-chapter__title{
  margin:0;
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(24px,3.6vw,40px);
  line-height:1.14;
  letter-spacing:-0.01em;
  color:var(--fog);
}
.page-about .about-chapter__text{
  margin:0 0 16px;
  max-width:38em;
  font-size:15.5px;
  line-height:1.85;
  color:var(--fog-dim);
}
.page-about .about-chapter__text:last-child{margin-bottom:0;}

.page-about .about-quote{
  margin:22px 0 0;
  padding:12px 0 12px 18px;
  border-left:2px solid var(--cyan);
  font-size:15px;
  line-height:1.7;
  color:var(--fog);
  max-width:34em;
}

/* 时间线 */
.page-about .about-steps{
  margin:24px 0 0;
  padding:0 0 0 var(--about-step-pad);
  list-style:none;
  border-left:1px solid var(--line);
}
.page-about .about-step{
  position:relative;
  padding-bottom:26px;
}
.page-about .about-step:last-child{padding-bottom:0;}
.page-about .about-step::before{
  content:"";
  position:absolute;
  left:calc(-1 * var(--about-step-pad) - 5px);
  top:8px;
  width:9px;
  height:9px;
  background:var(--ink-900);
  border:1px solid var(--cyan);
  transition:background .2s var(--ease),border-color .2s var(--ease);
}
.page-about .about-step:hover::before{background:var(--cyan);}
.page-about .about-step__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px;
  margin-bottom:8px;
}
.page-about .about-step__title{
  margin:0;
  font-size:17px;
  font-weight:600;
  line-height:1.4;
  color:var(--fog);
}
.page-about .about-step__note{
  margin:0;
  max-width:36em;
  font-size:15px;
  line-height:1.8;
  color:var(--fog-dim);
  border-left:1px solid transparent;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.page-about .about-step:hover .about-step__note{
  border-left-color:var(--line);
  color:var(--fog);
}

/* 图片 */
.page-about .about-figure{
  margin:24px 0 0;
  border:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,159,28,.07),rgba(7,21,35,0) 60%),var(--ink-800);
  overflow:hidden;
}
.page-about .about-figure img{
  display:block;
  width:100%;
  height:auto;
  object-fit:cover;
}

/* 山东沿海轮廓 */
.page-about .about-coast{
  display:block;
  width:100%;
  height:auto;
  margin-top:22px;
  overflow:visible;
}
.page-about .about-coast__line{
  fill:none;
  stroke:var(--line);
  stroke-width:1.5;
}
.page-about .about-coast__dots circle{
  fill:var(--ink-900);
  stroke:var(--cyan);
  stroke-width:1.5;
}
.page-about .about-coast__ticks line{
  stroke:var(--line-soft);
  stroke-width:1;
  stroke-dasharray:2 4;
}

/* 团队 */
.page-about .about-crew{
  display:grid;
  gap:14px;
  margin:22px 0 20px;
}
.page-about .about-crew__card{
  border:1px solid var(--line);
  background:var(--ink-800);
  padding:18px 16px;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.page-about .about-crew__card:hover,
.page-about .about-crew__card:focus-within{
  border-color:var(--cyan);
  background:var(--ink-700);
}
.page-about .about-crew__num{
  font-size:30px;
  line-height:1;
}
.page-about .about-crew__card--cyan .about-crew__num{color:var(--cyan);}
.page-about .about-crew__card--gold .about-crew__num{color:var(--gold);}
.page-about .about-crew__card--magenta .about-crew__num{color:var(--magenta);}
.page-about .about-crew__title{
  margin:10px 0 8px;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--fog);
}
.page-about .about-crew__text{
  margin:0;
  font-size:14px;
  line-height:1.75;
  color:var(--fog-dim);
}

/* 分类分布 */
.page-about .about-dist{
  margin:22px 0 20px;
  padding:0;
  list-style:none;
  border-top:1px solid var(--line-soft);
}
.page-about .about-dist__row{
  display:grid;
  grid-template-columns:5.5em minmax(0,1fr) 2em;
  align-items:center;
  gap:12px;
  padding:10px 0;
  border-bottom:1px solid var(--line-soft);
}
.page-about .about-dist__name{
  font-size:13.5px;
  color:var(--fog-dim);
}
.page-about .about-dist__track{
  display:block;
  height:6px;
  background:var(--ink-700);
  border:1px solid var(--line-soft);
  overflow:hidden;
}
.page-about .about-dist__fill{
  display:block;
  height:100%;
  width:50%;
  background:linear-gradient(90deg,rgba(45,226,230,.35),var(--cyan));
}
.page-about .about-dist__row:nth-child(1) .about-dist__fill{width:100%;}
.page-about .about-dist__row:nth-child(2) .about-dist__fill{width:73%;}
.page-about .about-dist__row:nth-child(3) .about-dist__fill{width:64%;}
.page-about .about-dist__row:nth-child(4) .about-dist__fill{width:55%;}
.page-about .about-dist__row:nth-child(5) .about-dist__fill{width:45%;}
.page-about .about-dist__row:nth-child(6) .about-dist__fill{width:45%;background:linear-gradient(90deg,rgba(255,159,28,.35),var(--gold));}
.page-about .about-dist__val{
  font-size:16px;
  text-align:right;
  color:var(--fog);
}

/* 下一步 */
.page-about .about-next{
  margin-top:clamp(30px,4.5vw,56px);
  padding:clamp(22px,3.4vw,34px);
  border:1px solid var(--line);
  background:
    radial-gradient(120% 140% at 100% 0%,rgba(45,226,230,.16),rgba(7,21,35,0) 58%),
    radial-gradient(110% 130% at 0% 100%,rgba(255,159,28,.14),rgba(7,21,35,0) 60%),
    var(--ink-800);
}
.page-about .about-next__title{
  margin:0 0 12px;
  font-family:var(--font-display);
  font-weight:300;
  font-size:clamp(22px,3vw,32px);
  line-height:1.2;
  letter-spacing:-0.01em;
  color:var(--fog);
}
.page-about .about-next__text{
  margin:0;
  max-width:38em;
  font-size:15px;
  line-height:1.8;
  color:var(--fog-dim);
}
.page-about .about-next__actions{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:20px;
}
.page-about .about-copy{appearance:none;background:transparent;cursor:pointer;}

@media (min-width:720px){
  .page-about .about-crew{grid-template-columns:repeat(3,minmax(0,1fr));}
  .page-about .about-dist__row{grid-template-columns:7em minmax(0,1fr) 2.4em;gap:16px;}
}

@media (min-width:960px){
  .page-about .about-hero__grid{
    grid-template-columns:minmax(0,7fr) minmax(0,5fr);
    align-items:end;
    gap:clamp(32px,5vw,72px);
  }
  .page-about .about-shell{
    grid-template-columns:var(--about-rail) minmax(0,1fr);
    gap:clamp(40px,6vw,76px);
  }
  .page-about .about-rail{
    position:sticky;
    top:132px;
    align-self:start;
    border-top:0;
    border-left:1px solid var(--line);
    padding:4px 0 0 18px;
  }
  .page-about .about-rail__list{
    display:block;
  }
  .page-about .about-rail__item{padding:5px 0;}
  .page-about .about-rail__link{font-size:13.5px;}
  .page-about .about-chapter__text{font-size:16px;}
}

@media (min-width:1180px){
  .page-about .about-hero__stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .page-about .about-stat{padding:20px 18px;}
}
<<<END>>>