/* ============================================================
   首页 · 银河总站内容中心
   作用域限定：.page-home
   ============================================================ */

.page-home {
  display: block;
  --home-rail: 4px;
  --home-section-y: var(--space-8);
}

@media (min-width: 768px) {
  .page-home {
    --home-section-y: var(--section-y);
  }
}

@media (min-width: 1200px) {
  .page-home {
    --home-section-y: var(--section-y-lg);
  }
}

/* ---------- 页面位置提示 ---------- */
.page-home__path {
  margin-bottom: var(--space-6);
}

.page-home__path-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-xs);
  letter-spacing: 0.09em;
  color: var(--color-ink-muted);
}

.page-home__path-item + .page-home__path-item::before {
  content: "/";
  margin: 0 var(--space-1);
  color: var(--color-line);
}

.page-home__path-item[aria-current="page"] {
  color: var(--color-accent);
}

/* ---------- 首屏声明 ---------- */
.page-home__hero {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-home__title {
  margin: 0 0 var(--space-4);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1.06;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.page-home__lede {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-lg);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

/* ---------- 首屏星野 ---------- */
.page-home__sky {
  margin: var(--space-6) 0 0;
}

.page-home__sky .media__frame {
  width: 100%;
  overflow: hidden;
}

.page-home__sky img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-home__sky .media__caption {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-2) var(--space-3) 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- 关键数字（每页唯一深色区块） ---------- */
.page-home__figures {
  margin-top: var(--space-8);
  padding: var(--space-8) 0;
}

.page-home__figure-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home__figure {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-contrast-line);
}

.page-home__figure-num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-contrast-accent);
  font-variant-numeric: tabular-nums;
  word-break: keep-all;
}

.page-home__figure-cap {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-contrast-ink);
}

.page-home__figure-note {
  margin: var(--space-1) 0 0;
  font-size: var(--text-xs);
  line-height: 1.65;
  color: var(--color-contrast-ink);
  opacity: 0.55;
  transition: opacity 160ms ease;
}

.page-home__figure:hover .page-home__figure-note,
.page-home__figure:focus-within .page-home__figure-note {
  opacity: 1;
}

@media (min-width: 768px) {
  .page-home__figure-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }

  .page-home__figure {
    padding-left: 0;
    padding-right: var(--space-4);
    border-left: none;
  }

  .page-home__figure:not(:first-child) {
    padding-left: var(--space-4);
    border-left: var(--border-thin) solid var(--color-contrast-line);
  }

  .page-home__figure:last-child {
    padding-right: 0;
  }
}

/* ---------- 双栏内容目录 ---------- */
.page-home__toc {
  padding-top: var(--space-6);
}

.page-home__toc-inner {
  display: grid;
  grid-template-columns: 1fr;
  column-gap: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home__toc-col {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home__toc-link {
  position: relative;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) 0 var(--space-2) var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
  text-decoration: none;
  font-size: var(--text-base);
  transition: background-color 160ms ease;
}

.page-home__toc-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 1px;
  height: 52%;
  transform: translateY(-50%);
  background-color: var(--color-line);
  transition: width 160ms ease, background-color 160ms ease;
}

.page-home__toc-link:hover {
  background-color: var(--color-primary-soft);
}

.page-home__toc-link:hover::before,
.page-home__toc-link:focus-visible::before {
  width: var(--home-rail);
  background-color: var(--color-accent);
}

.page-home__toc-link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-home__toc-num {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

@media (min-width: 768px) {
  .page-home__toc-inner {
    grid-template-columns: 1fr 1fr;
    column-gap: var(--space-8);
  }
}

/* ---------- 本期修订要点 ---------- */
.page-home__revisions,
.page-home__columns,
.page-home__info {
  padding: var(--home-section-y) 0;
}

.page-home__revisions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

@media (min-width: 900px) {
  .page-home__revisions-grid {
    grid-template-columns: 7fr 4fr;
    gap: var(--space-8);
    align-items: start;
  }
}

.page-home__rev-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home__rev {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: var(--space-3);
  row-gap: var(--space-2);
  align-items: baseline;
  padding: var(--space-4) 0 var(--space-4) var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: background-color 160ms ease;
}

.page-home__rev::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background-color: var(--color-line);
  transition: width 160ms ease, background-color 160ms ease;
}

.page-home__rev:hover {
  background-color: var(--color-primary-soft);
}

.page-home__rev:hover::before,
.page-home__rev:focus-within::before {
  width: var(--home-rail);
  background-color: var(--color-accent);
}

.page-home__rev-idx {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-home__rev-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-home__rev-desc,
.page-home__rev-meta {
  grid-column: 2;
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.page-home__rev-desc {
  max-width: var(--measure);
}

.page-home__rev-key {
  display: inline-block;
  min-width: 5em;
  margin-right: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.09em;
  color: var(--color-ink-muted);
}

.page-home__rev-aside .media {
  margin: 0;
}

.page-home__rev-aside img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 三条主线 ---------- */
.page-home__threads,
.page-home__visit {
  padding: var(--home-section-y) 0;
  background-color: var(--color-surface-alt);
}

.page-home__threads-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-top: var(--space-6);
}

@media (min-width: 900px) {
  .page-home__threads-grid {
    grid-template-columns: 5fr 6fr;
    gap: var(--space-8);
    align-items: center;
  }
}

.page-home__orbit-wrap {
  padding: var(--space-2) 0;
}

.page-home__orbit {
  position: relative;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  aspect-ratio: 1 / 1;
}

.page-home__orbit::before,
.page-home__orbit::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  border: var(--border-thin) solid var(--color-line);
  border-radius: 50%;
  pointer-events: none;
}

.page-home__orbit::before {
  width: 44%;
  height: 44%;
}

.page-home__orbit::after {
  width: 80%;
  height: 80%;
}

.page-home__node {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 2px;
  width: 44%;
  max-width: 172px;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.page-home__node--content {
  left: 50%;
  top: 0;
  transform: translateX(-50%);
}

.page-home__node--search {
  right: 0;
  bottom: 10%;
}

.page-home__node--member {
  left: 0;
  bottom: 10%;
}

.page-home__node:hover,
.page-home__node:focus-visible {
  border-color: var(--color-accent);
  background-color: var(--color-highlight);
}

.page-home__node:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-home__node-name {
  font-size: var(--text-sm);
  line-height: 1.35;
  color: inherit;
}

.page-home__node-meta {
  font-size: var(--text-xs);
  line-height: 1.4;
  color: var(--color-ink-muted);
}

.page-home__thread-body .lead {
  margin: 0;
}

.page-home__thread-list {
  margin: var(--space-4) 0 0;
  padding: 0;
}

.page-home__thread-list dt {
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-home__thread-list dd {
  margin: var(--space-1) 0 0;
  padding-bottom: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-home__thread-body .annotation {
  margin: var(--space-4) 0 0;
  padding-left: var(--space-3);
  border-left: var(--home-rail) solid var(--color-accent);
}

/* ---------- 重点栏目索引 ---------- */
.page-home__columns-banner {
  margin: 0 0 var(--space-6);
}

.page-home__columns-banner .media__frame {
  width: 100%;
}

.page-home__columns-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 1;
  object-fit: cover;
}

.page-home__catalog {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home__cat {
  position: relative;
  padding: var(--space-4) 0 var(--space-4) var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: background-color 160ms ease;
}

.page-home__cat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background-color: var(--color-line);
  transition: width 160ms ease, background-color 160ms ease;
}

.page-home__cat:hover {
  background-color: var(--color-primary-soft);
}

.page-home__cat:hover::before,
.page-home__cat:focus-within::before {
  width: var(--home-rail);
  background-color: var(--color-accent);
}

.page-home__cat-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
}

.page-home__cat-head:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-home__cat-num {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-home__cat-name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-home__cat-meta {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.page-home__cat-desc {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.page-home__cat-child {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-home__cat-child-key {
  padding: 2px var(--space-1);
  border: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

/* ---------- 首次到访的阅读顺序 ---------- */
.page-home__visit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 900px) {
  .page-home__visit-grid {
    grid-template-columns: 5fr 6fr;
    gap: var(--space-8);
    align-items: start;
  }
}

.page-home__visit-figure {
  margin: 0;
}

.page-home__visit-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-home__steps {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-home__step {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: var(--space-3);
  row-gap: var(--space-1);
  align-items: baseline;
  padding: var(--space-3) 0 var(--space-3) var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-home__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-3);
  bottom: var(--space-3);
  width: 1px;
  background-color: var(--color-line);
  transition: width 160ms ease, background-color 160ms ease;
}

.page-home__step:hover::before,
.page-home__step:focus-within::before {
  width: var(--home-rail);
  background-color: var(--color-accent);
}

.page-home__step-num {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-home__step-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-home__step-desc {
  grid-column: 2;
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.page-home__visit-note {
  margin: var(--space-4) 0 0;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

/* ---------- 站点信息条 ---------- */
.page-home__info {
  border-top: var(--border-thin) solid var(--color-line);
  padding-bottom: var(--space-8);
}

.page-home__info-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin: 0;
}

@media (min-width: 640px) {
  .page-home__info-list {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }
}

.page-home__info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-home__info-item dt {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-home__info-item dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-home__figure-note,
  .page-home__toc-link,
  .page-home__toc-link::before,
  .page-home__rev,
  .page-home__rev::before,
  .page-home__node,
  .page-home__cat,
  .page-home__cat::before,
  .page-home__step::before {
    transition: none;
  }
}