.page-home{
  --ph-gap: clamp(12px, 1.6vw, 20px);
  --ph-pad: clamp(16px, 2vw, 22px);
  display: block;
}

.page-home .page-home__context{
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: center;
  margin: clamp(20px, 3vw, 30px) 0 clamp(16px, 2.2vw, 22px);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text-3);
  font-size: 12px;
  letter-spacing: .05em;
}

.page-home .page-home__context span::before{
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  vertical-align: 1px;
  background: var(--line);
}
.page-home .page-home__context span:first-child::before{ background: var(--cinnabar-500); }
.page-home .page-home__context span:nth-child(2)::before{ background: var(--cyan-spark-400); }
.page-home .page-home__context span:nth-child(3)::before{ background: var(--moss-600); }

/* ---------- 首屏 ---------- */
.page-home .hero{
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
  padding-bottom: clamp(30px, 4.4vw, 54px);
}

.page-home .hero::after{
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cinnabar-500), transparent 52%, var(--cyan-spark-400));
  opacity: .7;
}

.page-home .hero__head{
  max-width: 46ch;
}

.page-home .hero__head .display-title{
  margin: 10px 0 14px;
}

.page-home .hero__head .lede{
  margin-bottom: 20px;
}

.page-home .hero__collage{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ph-gap);
  align-items: start;
}

.page-home .tile{
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: var(--ph-pad);
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-left-width: 3px;
  border-radius: var(--radius);
  min-width: 0;
}

.page-home .tile__num{
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--text-3);
}

.page-home .tile__title{
  margin: 0;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
  line-height: 1.35;
}

.page-home .tile__text{
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-2);
}

.page-home .tile__media{
  margin: 6px 0 0;
}

.page-home .tile__act{
  margin: auto 0 0;
  padding-top: 10px;
}

.page-home .tile--register{ border-left-color: var(--cinnabar-500); }
.page-home .tile--register .tile__num{ color: var(--cinnabar-ink); }
.page-home .tile--member{ border-left-color: var(--cyan-spark-400); }
.page-home .tile--member .tile__num{ color: var(--cyan-ink); }
.page-home .tile--beta{ border-left-color: var(--moss-600); }
.page-home .tile--beta .tile__num{ color: var(--moss-ink); }
.page-home .tile--archive{ border-left-color: var(--clay-500); }
.page-home .tile--archive .tile__num{ color: var(--clay-ink); }

@media (hover: hover) and (prefers-reduced-motion: no-preference){
  .page-home .tile{
    transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
  }
  .page-home .tile:hover{
    transform: translateY(-2px);
    box-shadow: var(--shadow);
  }
  .page-home .tile--register:hover{ border-color: var(--cinnabar-500); }
  .page-home .tile--member:hover{ border-color: var(--cyan-spark-400); }
  .page-home .tile--beta:hover{ border-color: var(--moss-600); }
  .page-home .tile--archive:hover{ border-color: var(--clay-500); }
}

@media (min-width: 760px){
  .page-home .hero__collage{
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .page-home .tile--register{ grid-column: span 7; }
  .page-home .tile--member{ grid-column: span 5; }
  .page-home .tile--beta{ grid-column: span 5; }
  .page-home .tile--archive{ grid-column: span 7; }
}

@media (min-width: 960px){
  .page-home .hero{
    grid-template-columns: minmax(0, 34fr) minmax(0, 66fr);
    align-items: start;
    gap: clamp(26px, 3.4vw, 48px);
  }
  .page-home .hero__head{
    position: sticky;
    top: 132px;
  }
}

/* ---------- 正文双栏 ---------- */
.page-home .page-home__body{
  margin-top: clamp(34px, 4.6vw, 62px);
}

.page-home .col-index__label{
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--text-3);
}

.page-home .col-index .aside-note{
  margin-top: 16px;
  font-size: 12.5px;
}

.page-home .index-list__link.is-active{
  color: var(--text);
}

.page-home .index-list__link.is-active .index-list__num{
  color: var(--amber-ink);
}

@media (max-width: 900px){
  .page-home .col-index{
    position: static;
    margin-bottom: var(--ph-gap);
  }
  .page-home .col-index .col-index__label{
    margin-bottom: 8px;
  }
  .page-home .index-list{
    display: flex;
    flex-wrap: nowrap;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 6px;
    scrollbar-width: thin;
  }
  .page-home .index-list__item{
    flex: 0 0 auto;
  }
  .page-home .col-index .aside-note{
    margin-top: 10px;
  }
}

.page-home .page-home__flow > section + section{
  margin-top: clamp(38px, 5vw, 70px);
}

/* ---------- 三条主线 ---------- */
.page-home .page-home__banner{
  margin: 0 0 clamp(18px, 2.4vw, 26px);
}

.page-home .steps{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ph-gap);
}

.page-home .step{
  padding: var(--ph-pad);
  background: var(--bg-3);
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--line);
  border-radius: var(--radius);
}

.page-home .step:nth-child(1){ border-top-color: var(--cinnabar-500); }
.page-home .step:nth-child(2){ border-top-color: var(--cyan-spark-400); }
.page-home .step:nth-child(3){ border-top-color: var(--moss-600); }

.page-home .step__num{
  display: inline-block;
  margin-bottom: 10px;
  padding: 1px 7px;
  font-size: 12px;
  color: var(--text-3);
  border: 1px solid var(--line);
}

.page-home .step__title{
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
}

.page-home .step__text{
  margin: 0 0 10px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-2);
}

.page-home .step__after{
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-3);
}

@media (min-width: 700px){
  .page-home .steps{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 栏目地图 ---------- */
.page-home .nav-map{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ph-gap);
}

.page-home .nav-map__item{
  position: relative;
  padding: var(--ph-pad);
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.page-home .nav-map__item::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
}

.page-home .nav-map__item--01::before{ background: var(--silver-300); }
.page-home .nav-map__item--02::before{ background: var(--moss-600); }
.page-home .nav-map__item--03::before{ background: var(--cyan-spark-400); }
.page-home .nav-map__item--04::before{ background: var(--clay-500); }
.page-home .nav-map__item--05::before{ background: var(--cinnabar-500); }
.page-home .nav-map__item--06::before{ background: var(--amber-400); }

.page-home .nav-map__num{
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--text-3);
}

.page-home .nav-map__item--02 .nav-map__num{ color: var(--moss-ink); }
.page-home .nav-map__item--03 .nav-map__num{ color: var(--cyan-ink); }
.page-home .nav-map__item--04 .nav-map__num{ color: var(--clay-ink); }
.page-home .nav-map__item--05 .nav-map__num{ color: var(--cinnabar-ink); }
.page-home .nav-map__item--06 .nav-map__num{ color: var(--amber-ink); }

.page-home .nav-map__title{
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--text);
}

.page-home .nav-map__text{
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-2);
}

.page-home .page-home__double{
  margin: clamp(18px, 2.4vw, 26px) 0 0;
}

@media (min-width: 640px){
  .page-home .nav-map{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1080px){
  .page-home .nav-map{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 版本基线 ---------- */
.page-home .baseline{
  display: grid;
  gap: var(--ph-gap);
}

.page-home .baseline .prose{
  margin: 0;
}

.page-home .baseline .panel{
  background: var(--bg-2);
}

.page-home .panel-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-home .panel-list li{
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-2);
}

.page-home .panel-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  background: var(--moss-600);
}

.page-home .panel:nth-of-type(2) .panel-list li::before{
  background: var(--slate-600);
}

/* ---------- 旧版本资料 ---------- */
.page-home .archive-split{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ph-gap);
}

.page-home .archive-body{
  min-width: 0;
}

.page-home .archive-facts{
  list-style: none;
  margin: clamp(14px, 2vw, 20px) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-home .archive-facts li{
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-2);
}

.page-home .archive-facts .mono{
  color: var(--clay-ink);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-home .archive-body .btn-row{
  margin-top: clamp(16px, 2vw, 22px);
}

@media (min-width: 820px){
  .page-home .archive-split{
    grid-template-columns: minmax(0, 40fr) minmax(0, 60fr);
    align-items: start;
  }
}

/* ---------- 情形路径 ---------- */
.page-home .path-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ph-gap);
}

.page-home .path-item{
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: var(--ph-pad);
  background: var(--bg-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}

.page-home .path-item__num{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  font-size: 14px;
  color: var(--amber-ink);
  background: var(--bg-3);
  border: 1px solid var(--line);
}

.page-home .path-item__body{
  min-width: 0;
}

.page-home .path-item__title{
  margin: 2px 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
}

.page-home .path-item__text{
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-2);
}

.page-home .path-item__chain{
  margin: 10px 0 0;
  padding-top: 9px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--text-3);
  word-break: break-word;
}

@media (min-width: 760px){
  .page-home .path-list{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 交互与可访问性 ---------- */
.page-home a:focus-visible,
.page-home summary:focus-visible{
  outline: 2px solid var(--amber-400);
  outline-offset: 3px;
}

.page-home .media-frame img{
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
<<<END>>>