.page-home {
  --home-gap: clamp(1.25rem, 3vw, 2.75rem);
  --home-card-pad: clamp(1.1rem, 2.2vw, 1.6rem);
  --home-full: min(100% - 2rem, var(--shell));
}

/* ---------- 首屏 ---------- */
.page-home .home-hero {
  position: relative;
  padding: calc(var(--nav-h) + 2.25rem) 0 clamp(2.75rem, 6vw, 4.75rem);
}

.page-home .home-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--line), var(--gold) 45%, var(--cyan) 100%);
  opacity: 0.7;
}

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

.page-home .home-hero__copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.15rem;
  min-width: 0;
}

.page-home .home-hero__copy h1 {
  margin: 0;
  font-size: clamp(1.85rem, 1.15rem + 3.1vw, 3.25rem);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 22ch;
}

.page-home .home-hero__lede {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(0.98rem, 0.94rem + 0.25vw, 1.12rem);
  line-height: 1.9;
  color: var(--paper);
}

.page-home .home-hero__copy .search-bar {
  width: 100%;
  max-width: 30rem;
}

.page-home .home-hero__visual {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.page-home .home-hero__visual > img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--bd);
  background: var(--ink-3);
}

/* ---------- 版本演进带 ---------- */
.page-home .ver-rail {
  border: var(--bd);
  background: var(--ink-2);
  padding: 0.95rem 1rem 1.1rem;
  box-shadow: var(--hard);
}

.page-home .ver-rail__head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.4rem 1rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.page-home .ver-rail__head .mono {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-home .ver-rail__track {
  list-style: none;
  margin: 0;
  padding: 0.9rem 0 0.15rem;
  display: grid;
  grid-template-columns: repeat(11, minmax(0, 1fr));
  position: relative;
}

.page-home .ver-rail__track::before {
  content: "";
  position: absolute;
  top: calc(0.9rem + 5px);
  left: 4.5%;
  right: 4.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--line) 0%, var(--line) 55%, var(--gold) 88%, var(--cyan) 100%);
}

.page-home .ver-node {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.page-home .ver-node__dot {
  position: relative;
  z-index: 1;
  width: 12px;
  height: 12px;
  border: 2px solid var(--line);
  background: var(--ink-3);
  border-radius: 50%;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-home .ver-node__num {
  font-size: 0.7rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-home .ver-node:hover .ver-node__dot,
.page-home .ver-node:focus-within .ver-node__dot {
  border-color: var(--cyan);
  background: var(--cyan);
}

.page-home .ver-node:hover .ver-node__num,
.page-home .ver-node:focus-within .ver-node__num {
  color: var(--paper);
}

.page-home .ver-node--current .ver-node__dot {
  border-color: var(--gold);
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(224, 180, 92, 0.16);
}

.page-home .ver-node--current .ver-node__num {
  color: var(--gold);
  font-weight: 700;
}

.page-home .ver-node__pop {
  display: none;
}

.page-home .ver-node__pop {
  font-size: 0.7rem;
  line-height: 1.55;
}

/* ---------- 章节通用 ---------- */
.page-home .section {
  padding: clamp(2.75rem, 6vw, 4.5rem) 0;
}

.page-home .section-head {
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.page-home .section-head h2,
.page-home .home-search__body h2,
.page-home .home-mobile__copy h2 {
  margin: 0;
  font-size: clamp(1.4rem, 1.1rem + 1.5vw, 2.05rem);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-home .section-head h2 {
  max-width: 26ch;
}

/* ---------- 01 栏目入口 ---------- */
.page-home .entry-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-home .entry-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.65rem;
  padding: var(--home-card-pad);
  min-height: 0;
  border: var(--bd);
  background: var(--ink-2);
  color: var(--paper);
  text-decoration: none;
  box-shadow: var(--hard);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-home .entry-card__code {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-home .entry-card__title {
  margin: 0;
  font-size: clamp(1.05rem, 0.98rem + 0.5vw, 1.35rem);
  line-height: 1.4;
  font-weight: 800;
  color: var(--paper);
}

.page-home .entry-card__body {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-home .entry-card__go {
  margin-top: auto;
  padding-top: 0.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-home .entry-card--latest {
  border-left: 4px solid var(--amber);
}

.page-home .entry-card--archive {
  border-left: 4px solid var(--archive);
}

/* ---------- 02 检索台 ---------- */
.page-home .home-search__body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-home .home-search__lede {
  margin: 0;
  max-width: 62ch;
  line-height: 1.85;
  color: var(--muted);
}

.page-home .search-modes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 0.5rem;
}

.page-home .search-mode {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: var(--home-card-pad);
  border: var(--bd);
  border-left: 4px solid var(--line);
  background: var(--ink-3);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-home .search-mode:hover {
  border-color: var(--cyan);
  border-left-color: var(--cyan);
  transform: translateY(-2px);
}

.page-home .search-mode__idx {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-home .search-mode h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--paper);
}

.page-home .search-mode p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-home .search-mode__eg {
  margin-top: auto !important;
  padding-top: 0.55rem;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--cyan) !important;
}

.page-home .home-search__figure {
  margin: 1.5rem 0 0;
}

.page-home .home-search__figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 03 最近更新 ---------- */
.page-home .home-recent__lede {
  margin: 0 0 1.5rem;
  max-width: 64ch;
  line-height: 1.9;
  color: var(--muted);
}

.page-home .recent-list {
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-home .recent-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.9rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}

.page-home .recent-item__ver {
  flex: 0 0 auto;
  min-width: 4.5rem;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-home .recent-item__summary {
  flex: 1 1 20rem;
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--paper);
}

.page-home .recent-item .meta {
  flex: 0 0 auto;
}

/* ---------- 几何切割分隔 ---------- */
.page-home .home-divider {
  width: var(--home-full);
  margin: clamp(1rem, 3vw, 2rem) auto;
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-home .home-divider img {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.85;
}

/* ---------- 04 移动端 ---------- */
.page-home .home-mobile__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--home-gap);
  align-items: start;
}

.page-home .home-mobile__copy {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  min-width: 0;
}

.page-home .home-mobile__copy p {
  margin: 0;
  max-width: 58ch;
  line-height: 1.9;
  color: var(--muted);
}

.page-home .mobile-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 1rem;
  margin: 0.85rem 0 0;
  padding: 1.1rem 0 0;
  border-top: 2px solid var(--line);
}

.page-home .mobile-fact {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-home .mobile-fact dt {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-home .mobile-fact dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.page-home .mobile-fact__unit {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-home .mobile-notes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
  min-width: 0;
}

.page-home .mobile-notes li {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
  padding: 1rem;
  border: var(--bd);
  background: var(--ink-2);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-home .mobile-notes li:hover {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-home .mobile-notes__idx {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--cyan);
}

.page-home .mobile-notes p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 收尾图形 ---------- */
.page-home .home-tail {
  width: var(--home-full);
  margin: 0 auto clamp(1.5rem, 4vw, 3rem);
  display: flex;
  justify-content: center;
}

.page-home .home-tail img {
  display: block;
  width: min(100%, 24rem);
  height: auto;
  opacity: 0.6;
}

/* ---------- 720px 断点 ---------- */
@media (min-width: 720px) {
  .page-home .entry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-home .entry-card--latest {
    grid-column: span 2;
  }

  .page-home .search-modes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-home .recent-item__ver {
    min-width: 5.5rem;
  }

  .page-home .ver-node__pop {
    display: block;
    position: absolute;
    bottom: calc(100% + 0.55rem);
    left: 50%;
    transform: translate(-50%, 4px);
    width: max-content;
    max-width: 10rem;
    padding: 0.45rem 0.6rem;
    border: 1px solid var(--line);
    background: var(--ink-3);
    color: var(--paper);
    opacity: 0;
    pointer-events: none;
    z-index: 6;
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  }

  .page-home .ver-node:hover .ver-node__pop,
  .page-home .ver-node:focus-within .ver-node__pop {
    opacity: 1;
    transform: translate(-50%, 0);
  }

  .page-home .ver-rail__track {
    overflow: visible;
  }
}

/* ---------- 1024px 断点 ---------- */
@media (min-width: 1024px) {
  .page-home .home-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-home .section-head h2 {
    max-width: 34ch;
  }

  .page-home .entry-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-home .entry-card--latest {
    grid-column: span 4;
    min-height: 15.5rem;
  }

  .page-home .entry-card--entries {
    grid-column: span 2;
  }

  .page-home .entry-card--answers {
    grid-column: span 2;
  }

  .page-home .entry-card--archive {
    grid-column: span 4;
    min-height: 12rem;
  }

  .page-home .home-mobile__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 4vw, 3.25rem);
  }
}

/* ---------- 窄屏版本演进带横向滑动 ---------- */
@media (max-width: 719px) {
  .page-home .ver-rail__track {
    grid-template-columns: repeat(11, 3.1rem);
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
  }

  .page-home .ver-rail__track::before {
    left: 1.55rem;
    right: 1.55rem;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-home .entry-card,
  .page-home .search-mode,
  .page-home .mobile-notes li,
  .page-home .ver-node__dot,
  .page-home .ver-node__num,
  .page-home .ver-node__pop {
    transition: none;
  }

  .page-home .entry-card:hover,
  .page-home .search-mode:hover,
  .page-home .mobile-notes li:hover {
    transform: none;
  }
}
<<<END>>>