.page-home {
  --hm-border: 3px solid var(--vi-ink-800);
  --hm-shadow: 8px 8px 0 rgba(23, 59, 49, .14);
  --hm-shadow-hover: 11px 11px 0 rgba(201, 162, 74, .32);
  --hm-hairline: 1px solid rgba(28, 35, 32, .12);
}

/* ---------- 首屏 ---------- */
.page-home .hm-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "head"
    "index"
    "collage";
  gap: clamp(22px, 4vw, 38px);
  padding-block: clamp(16px, 3vw, 32px) clamp(30px, 5vw, 60px);
}

.page-home .hm-hero__head { grid-area: head; }
.page-home .hm-hero__index { grid-area: index; }
.page-home .hm-collage { grid-area: collage; }

.page-home .hm-hero__title {
  margin: 10px 0 14px;
  font-family: var(--vi-font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--vi-ink-950);
}

.page-home .hm-hero__lede {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: rgba(28, 35, 32, .82);
}

/* 左侧索引轨道 */
.page-home .hm-hero__index {
  border-left: 3px solid var(--vi-gold-500);
  padding-left: 14px;
}

.page-home .hm-index__title {
  margin: 0 0 10px;
  font-family: var(--vi-font-mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--vi-moss-600);
}

.page-home .hm-index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--hm-hairline);
}

.page-home .hm-index li {
  border-bottom: var(--hm-hairline);
}

.page-home .hm-index__link {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 10px 6px;
  text-decoration: none;
  font-size: .94rem;
  color: var(--vi-graphite-900);
  transition: background-color .2s ease, padding-left .2s ease, color .2s ease;
}

.page-home .hm-index__link:hover,
.page-home .hm-index__link:focus-visible {
  background: var(--vi-ivory-100);
  padding-left: 12px;
  color: var(--vi-ink-800);
}

.page-home .hm-index__num {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  font-family: var(--vi-font-mono);
  font-size: .74rem;
  color: var(--vi-gold-500);
  background: var(--vi-paper-0);
  border: 1px solid rgba(201, 162, 74, .55);
}

/* 图片容器 */
.page-home .hm-figure {
  margin: 0;
  overflow: hidden;
  background: var(--vi-ink-950);
  border: 2px solid var(--vi-ink-800);
  box-shadow: var(--hm-shadow);
}

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

.page-home .hm-figure--small {
  margin-top: 14px;
}

.page-home .hm-figure__cap {
  padding: 10px 12px;
  font-family: var(--vi-font-mono);
  font-size: .72rem;
  line-height: 1.7;
  color: var(--vi-gold-200);
  background: var(--vi-ink-950);
}

/* 首屏卡片阵列 */
.page-home .hm-collage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 22px);
  align-content: start;
}

.page-home .hm-card {
  padding: clamp(16px, 2.2vw, 22px);
  background: var(--vi-paper-0);
  border: var(--hm-border);
  box-shadow: var(--hm-shadow);
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.page-home .hm-card:hover,
.page-home .hm-card:focus-within {
  transform: translate(-2px, -2px);
  box-shadow: var(--hm-shadow-hover);
  border-color: var(--vi-moss-600);
}

.page-home .hm-card__title {
  margin: 8px 0 8px;
  font-family: var(--vi-font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  line-height: 1.28;
  color: var(--vi-ink-950);
}

.page-home .hm-card__text {
  margin: 0 0 14px;
  font-size: .94rem;
  line-height: 1.75;
  color: rgba(28, 35, 32, .8);
}

.page-home .hm-card__code {
  margin: 0 0 14px;
  font-family: var(--vi-font-mono);
  font-size: .86rem;
  letter-spacing: .1em;
  color: var(--vi-brick-500);
}

.page-home .hm-card--download {
  background: var(--vi-ink-800);
  border-color: var(--vi-ink-950);
  box-shadow: 8px 8px 0 rgba(201, 162, 74, .34);
}

.page-home .hm-card--download .hm-card__title { color: var(--vi-ivory-50); }
.page-home .hm-card--download .hm-card__text { color: rgba(247, 242, 231, .84); }
.page-home .hm-card--download .vi-eyebrow { color: var(--vi-gold-200); }

/* ---------- 章节通用 ---------- */
.page-home .hm-block {
  padding-block: clamp(34px, 5vw, 64px);
  border-top: var(--hm-hairline);
}

.page-home .hm-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-home .hm-block__title {
  margin: 6px 0 0;
  font-family: var(--vi-font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.4vw, 2.2rem);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--vi-ink-950);
}

.page-home .hm-block__lead {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(28, 35, 32, .8);
}

.page-home .hm-subtitle {
  margin: 0 0 12px;
  font-family: var(--vi-font-mono);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--vi-moss-600);
}

/* ---------- 移动端短路径 ---------- */
.page-home .hm-path__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
}

.page-home .hm-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-home .hm-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 18px;
  background: var(--vi-ivory-100);
  border-left: 3px solid var(--vi-gold-500);
}

.page-home .hm-step__num {
  font-family: var(--vi-font-mono);
  font-size: 1rem;
  letter-spacing: .06em;
  color: var(--vi-moss-600);
}

.page-home .hm-step h3 {
  margin: 0 0 4px;
  font-family: var(--vi-font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--vi-ink-950);
}

.page-home .hm-step p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: rgba(28, 35, 32, .78);
}

.page-home .hm-note {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 16px;
  padding: 14px 18px;
  background: rgba(232, 217, 168, .24);
  border: 1px dashed rgba(201, 162, 74, .75);
}

.page-home .hm-note__num {
  font-family: var(--vi-font-mono);
  font-size: 1.9rem;
  font-weight: 600;
  line-height: 1;
  color: var(--vi-gold-500);
}

.page-home .hm-note p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--vi-graphite-900);
}

/* ---------- 修订摘录 ---------- */
.page-home .hm-revision__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
}

.page-home .hm-revisions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-home .hm-revision {
  padding: 16px 18px;
  background: var(--vi-paper-0);
  border: 1px solid rgba(28, 35, 32, .14);
  border-left: 3px solid var(--vi-moss-600);
}

.page-home .hm-revision__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-home .hm-revision__code {
  padding: 2px 8px;
  font-family: var(--vi-font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--vi-ink-800);
  background: var(--vi-ivory-100);
  border: 1px solid rgba(28, 35, 32, .12);
}

.page-home .hm-revision h3 {
  margin: 0 0 6px;
  font-family: var(--vi-font-display);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.4;
  color: var(--vi-ink-950);
}

.page-home .hm-revision p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: rgba(28, 35, 32, .78);
}

/* ---------- 帮助与联系 ---------- */
.page-home .hm-help {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
}

.page-home .hm-cats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.page-home .hm-cats a {
  display: block;
  padding: 12px 14px;
  font-size: .94rem;
  text-decoration: none;
  color: var(--vi-ink-950);
  background: var(--vi-paper-0);
  border: 1px solid rgba(28, 35, 32, .14);
  transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}

.page-home .hm-cats a:hover,
.page-home .hm-cats a:focus-visible {
  background: var(--vi-ivory-100);
  border-color: var(--vi-gold-500);
  color: var(--vi-ink-800);
}

.page-home .hm-help__foot {
  margin: 14px 0 0;
  font-size: .9rem;
  line-height: 1.75;
  color: rgba(28, 35, 32, .74);
}

.page-home .hm-help__col--contact {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--vi-ink-950);
  border: 3px solid var(--vi-ink-800);
  box-shadow: var(--hm-shadow);
}

.page-home .hm-help__col--contact .hm-subtitle { color: var(--vi-gold-200); }

.page-home .hm-help__desc {
  margin: 0 0 16px;
  font-size: .93rem;
  line-height: 1.78;
  color: rgba(247, 242, 231, .82);
}

.page-home .hm-contact {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-home .hm-contact__row {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(232, 217, 168, .22);
}

.page-home .hm-contact__row dt {
  font-family: var(--vi-font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--vi-steel-400);
}

.page-home .hm-contact__row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-home .hm-contact__value {
  font-family: var(--vi-font-mono);
  font-size: clamp(.9rem, 2.2vw, 1rem);
  color: var(--vi-ivory-50);
  word-break: break-all;
}

.page-home .hm-contact__copy {
  flex: none;
}

.page-home .hm-help__link {
  margin-top: 18px;
}

/* ---------- 继续探索 ---------- */
.page-home .hm-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-home .hm-link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  grid-template-areas:
    "num label"
    "num desc";
  column-gap: 12px;
  align-items: center;
  padding: 14px 16px;
  text-decoration: none;
  background: var(--vi-paper-0);
  border: 1px solid rgba(28, 35, 32, .14);
  border-bottom-width: 3px;
  transition: border-color .2s ease, background-color .2s ease, transform .2s ease;
}

.page-home .hm-link:hover,
.page-home .hm-link:focus-visible {
  background: var(--vi-ivory-100);
  border-color: var(--vi-gold-500);
  transform: translateX(3px);
}

.page-home .hm-link__num {
  grid-area: num;
  font-family: var(--vi-font-mono);
  font-size: .82rem;
  color: var(--vi-gold-500);
}

.page-home .hm-link__label {
  grid-area: label;
  font-family: var(--vi-font-display);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--vi-ink-950);
}

.page-home .hm-link__desc {
  grid-area: desc;
  font-size: .84rem;
  line-height: 1.6;
  color: var(--vi-steel-400);
}

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

  .page-home .hm-path__grid,
  .page-home .hm-revision__grid,
  .page-home .hm-help {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-home .hm-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-home .hm-hero {
    grid-template-columns: 244px minmax(0, 1fr);
    grid-template-areas:
      "index head"
      "index collage";
    column-gap: clamp(24px, 3vw, 40px);
    align-items: start;
  }

  .page-home .hm-hero__index {
    position: sticky;
    top: 104px;
  }

  .page-home .hm-collage {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 20px;
  }

  .page-home .hm-card--download { grid-column: span 4; }
  .page-home .hm-tile { grid-column: span 2; }
  .page-home .hm-card--collect { grid-column: span 2; margin-top: 30px; }
  .page-home .hm-card--version { grid-column: span 2; margin-top: 6px; }
  .page-home .hm-card--help { grid-column: span 2; margin-top: 44px; }

  .page-home .hm-path__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-home .hm-revision__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
  }

  .page-home .hm-help {
    grid-template-columns: minmax(0, 1fr) minmax(0, .78fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .hm-card,
  .page-home .hm-index__link,
  .page-home .hm-link,
  .page-home .hm-cats a {
    transition: none;
  }

  .page-home .hm-card:hover,
  .page-home .hm-card:focus-within,
  .page-home .hm-link:hover,
  .page-home .hm-link:focus-visible {
    transform: none;
  }
}