.page-home {
  background: var(--void);
  color: var(--silver);
}

/* ---------- 页面上下文条 ---------- */
.page-home .hm-context {
  border-bottom: 1px solid var(--grid);
  background: var(--void);
}
.page-home .hm-context__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  justify-content: space-between;
  padding-top: 10px;
  padding-bottom: 10px;
}
.page-home .hm-context__path,
.page-home .hm-context__meta {
  margin: 0;
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--steel);
}
.page-home .hm-context__path {
  color: var(--silver);
}

/* ---------- 框景首屏 ---------- */
.page-home .hm-hero {
  padding: var(--gutter) var(--gutter) 0;
}
.page-home .hm-hero__frame {
  position: relative;
  display: flex;
  align-items: flex-end;
  max-width: var(--shell);
  min-height: clamp(400px, 64vh, 680px);
  margin: 0 auto;
  border: 1px solid var(--grid);
  overflow: hidden;
  isolation: isolate;
}
.page-home .hm-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  filter: saturate(0.7);
  z-index: 0;
}
.page-home .hm-hero__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 20, 32, 0.3) 0%, rgba(6, 20, 32, 0.94) 82%);
  z-index: 1;
  pointer-events: none;
}
.page-home .hm-hero__ruler {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 26px);
  z-index: 4;
}
.page-home .hm-hero__mark {
  position: absolute;
  width: 18px;
  height: 18px;
  z-index: 4;
  border: 0 solid var(--amber);
}
.page-home .hm-hero__mark--tl { top: 12px; left: 12px; border-top-width: 1px; border-left-width: 1px; }
.page-home .hm-hero__mark--tr { top: 12px; right: 12px; border-top-width: 1px; border-right-width: 1px; }
.page-home .hm-hero__mark--bl { bottom: 12px; left: 12px; border-bottom-width: 1px; border-left-width: 1px; }
.page-home .hm-hero__mark--br { bottom: 12px; right: 12px; border-bottom-width: 1px; border-right-width: 1px; }

.page-home .hm-hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: clamp(30px, 6vw, 68px);
}
.page-home .hm-hero__coords {
  margin: 0 0 20px;
  font-size: var(--step-1);
  letter-spacing: 0.06em;
  color: var(--amber);
}
.page-home .hm-hero__title {
  margin: 0 0 20px;
  max-width: 15em;
  font-size: clamp(2.1rem, 6.4vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-home .hm-hero__lede {
  margin: 0 0 28px;
  max-width: 34em;
  font-size: var(--step-3);
  line-height: 1.85;
  color: var(--steel);
}
.page-home .hm-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 主体两栏 ---------- */
.page-home .hm-shell {
  display: grid;
  gap: 32px;
  padding-top: 48px;
  padding-bottom: 80px;
}

/* ---------- 章节索引 ---------- */
.page-home .hm-index {
  border-top: 1px solid var(--grid);
  padding-top: 14px;
}
.page-home .hm-index__head {
  margin: 0 0 12px;
  font-size: var(--step-1);
  letter-spacing: 0.08em;
  color: var(--steel);
}
.page-home .hm-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.page-home .hm-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  font-size: var(--step-2);
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-home .hm-index__link .mono {
  font-size: var(--step-1);
  letter-spacing: 0.06em;
  color: var(--amber);
}
.page-home .hm-index__link:hover,
.page-home .hm-index__link:focus-visible {
  color: var(--amber-soft);
  border-bottom-color: var(--amber);
}

/* ---------- 章节面板 ---------- */
.page-home .hm-flow {
  min-width: 0;
}
.page-home .hm-chapter {
  position: relative;
  margin-bottom: 28px;
  padding: clamp(22px, 4vw, 44px);
  border: 1px solid var(--grid);
  background: var(--hull);
}
.page-home .hm-chapter__head {
  border-bottom: 1px solid var(--grid);
  padding-bottom: 20px;
  margin-bottom: 26px;
}
.page-home .hm-chapter__num {
  display: block;
  font-size: clamp(1.6rem, 4.2vw, 2.6rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--amber);
}
.page-home .hm-chapter__title {
  margin: 10px 0 12px;
  font-size: clamp(1.35rem, 3.4vw, 2.05rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-home .hm-chapter__lede {
  margin: 0;
  max-width: 34em;
  font-size: var(--step-3);
  line-height: 1.85;
  color: var(--steel);
}
.page-home .hm-chapter__foot {
  margin: 18px 0 0;
  font-size: var(--step-2);
  line-height: 1.8;
  color: var(--steel);
}

/* ---------- 图注容器 ---------- */
.page-home .hm-figure {
  margin: 0 0 26px;
  border: 1px solid var(--grid);
  background: var(--deck);
  position: relative;
}
.page-home .hm-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-home .hm-figure__cap {
  margin: 0;
  padding: 10px 14px;
  border-top: 1px solid var(--grid);
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--steel);
}
.page-home .hm-figure--wide {
  margin-bottom: 28px;
}
.page-home .hm-figure--side {
  margin-bottom: 0;
}

/* ---------- 01 四类问询 ---------- */
.page-home .hm-routes {
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}
.page-home .hm-route {
  display: block;
  padding: 22px 20px 20px;
  background: var(--hull);
  text-decoration: none;
  color: inherit;
  transition: background-color 0.25s var(--ease);
}
.page-home .hm-route:hover,
.page-home .hm-route:focus-visible {
  background: rgba(244, 212, 154, 0.08);
}
.page-home .hm-route__tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--grid);
  font-size: var(--step-1);
  letter-spacing: 0.08em;
  color: var(--amber);
}
.page-home .hm-route__title {
  margin: 14px 0 10px;
  font-size: var(--step-4);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}
.page-home .hm-route__desc {
  margin: 0 0 16px;
  font-size: var(--step-2);
  line-height: 1.8;
  color: var(--steel);
}
.page-home .hm-route__go {
  display: inline-block;
  font-size: var(--step-1);
  letter-spacing: 0.05em;
  color: var(--amber);
  border-bottom: 1px solid var(--grid);
  padding-bottom: 2px;
}
.page-home .hm-route:hover .hm-route__go,
.page-home .hm-route:focus-visible .hm-route__go {
  color: var(--amber-soft);
  border-bottom-color: var(--amber);
}

/* ---------- 02 对照 ---------- */
.page-home .hm-compare {
  display: grid;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
  margin-bottom: 26px;
}
.page-home .hm-compare__half {
  padding: 22px 20px;
  background: var(--void);
}
.page-home .hm-compare__half--amber {
  background: rgba(226, 163, 74, 0.06);
}
.page-home .hm-compare__label {
  margin: 0 0 12px;
  font-size: var(--step-1);
  letter-spacing: 0.08em;
  color: var(--steel);
}
.page-home .hm-compare__value {
  margin: 0 0 12px;
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  letter-spacing: 0.03em;
  color: var(--amber);
}
.page-home .hm-compare__text {
  margin: 0;
  max-width: 34em;
  font-size: var(--step-2);
  line-height: 1.85;
  color: var(--steel);
}

.page-home .hm-cats {
  display: grid;
  gap: 1px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  background: var(--grid);
  border: 1px solid var(--grid);
}
.page-home .hm-cat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 16px;
  padding: 14px 18px;
  background: var(--deck);
}
.page-home .hm-cat__name {
  font-size: var(--step-3);
  color: var(--paper);
}
.page-home .hm-cat__meta {
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ---------- 03 规模 ---------- */
.page-home .hm-scale {
  display: grid;
  gap: 28px;
}
.page-home .hm-scale__text p {
  margin: 0 0 18px;
  max-width: 34em;
  font-size: var(--step-3);
  line-height: 1.85;
  color: var(--steel);
}
.page-home .hm-scale__stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--grid);
}
.page-home .hm-scale__num {
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber);
}
.page-home .hm-scale__unit {
  font-size: var(--step-3);
  color: var(--silver);
}
.page-home .hm-range {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 26px;
}
.page-home .hm-range__end {
  font-size: var(--step-2);
  letter-spacing: 0.04em;
  color: var(--amber);
}
.page-home .hm-range__track {
  position: relative;
  flex: 1 1 auto;
  min-width: 60px;
  height: 1px;
  background: var(--grid);
}
.page-home .hm-range__track::before,
.page-home .hm-range__track::after {
  content: "";
  position: absolute;
  top: -4px;
  width: 1px;
  height: 9px;
  background: var(--amber);
}
.page-home .hm-range__track::before { left: 0; }
.page-home .hm-range__track::after { right: 0; }
.page-home .hm-range__note {
  margin: 8px 0 0;
  font-size: var(--step-1);
  letter-spacing: 0.05em;
  color: var(--steel);
}

/* ---------- 04 阅读深度 ---------- */
.page-home .hm-depth {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--grid);
  border: 1px solid var(--grid);
}
.page-home .hm-depth__item {
  padding: 22px 20px;
  background: var(--hull);
}
.page-home .hm-depth__idx {
  display: inline-block;
  font-size: var(--step-2);
  letter-spacing: 0.14em;
  color: var(--amber);
}
.page-home .hm-depth__name {
  margin: 10px 0 10px;
  font-size: var(--step-4);
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}
.page-home .hm-depth__item p {
  margin: 0;
  max-width: 34em;
  font-size: var(--step-2);
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 页脚导读 ---------- */
.page-home .hm-next {
  margin-top: 12px;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--grid);
  border-left: 3px solid var(--amber);
  background: var(--deck);
}
.page-home .hm-next__eyebrow {
  margin: 0 0 14px;
}
.page-home .hm-next__title {
  margin: 0 0 14px;
  font-size: clamp(1.4rem, 3.6vw, 2.1rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-home .hm-next__lede {
  margin: 0 0 24px;
  max-width: 34em;
  font-size: var(--step-3);
  line-height: 1.85;
  color: var(--steel);
}
.page-home .hm-next__list {
  display: grid;
  gap: 1px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  background: var(--grid);
  border: 1px solid var(--grid);
}
.page-home .hm-next__item a {
  display: block;
  padding: 18px 18px;
  background: var(--void);
  text-decoration: none;
  color: inherit;
  transition: background-color 0.25s var(--ease);
}
.page-home .hm-next__item a:hover,
.page-home .hm-next__item a:focus-visible {
  background: rgba(244, 212, 154, 0.08);
}
.page-home .hm-next__name {
  display: block;
  margin-bottom: 8px;
  font-size: var(--step-4);
  font-weight: 700;
  color: var(--paper);
}
.page-home .hm-next__desc {
  display: block;
  max-width: 34em;
  font-size: var(--step-2);
  line-height: 1.8;
  color: var(--steel);
}
.page-home .hm-next__foot {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 通用文字链接 ---------- */
.page-home .hm-textlink {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid var(--grid);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-home .hm-textlink:hover,
.page-home .hm-textlink:focus-visible {
  color: var(--amber-soft);
  border-bottom-color: var(--amber);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-home .hm-routes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-home .hm-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-home .hm-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-home .hm-depth {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-home .hm-next__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-home .hm-shell {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 44px;
  }
  .page-home .hm-index {
    position: sticky;
    top: 108px;
    align-self: start;
  }
  .page-home .hm-index__list {
    flex-direction: column;
    gap: 10px;
  }
  .page-home .hm-scale {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: start;
  }
  .page-home .hm-figure--side {
    margin-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .hm-route,
  .page-home .hm-next__item a,
  .page-home .hm-index__link,
  .page-home .hm-textlink {
    transition: none;
  }
}
</main>