.page-home {
  --home-gap: 24px;
  --home-cut: 18px;
  --home-line: 1px solid var(--line-400);
}

/* ============ HERO ============ */
.page-home .home-hero {
  position: relative;
  padding: 108px 0 56px;
  overflow: hidden;
  isolation: isolate;
}

.page-home .home-hero-bg {
  position: absolute;
  right: 0;
  bottom: 0;
  width: min(82%, 780px);
  opacity: .18;
  pointer-events: none;
  z-index: 0;
  transform: translate(8%, 10%);
}

.page-home .home-hero-bg img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(.65) brightness(.85);
}

.page-home .home-hero-inner {
  position: relative;
  z-index: 1;
}

.page-home .home-context {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--f-2xs);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.page-home .home-context .mono {
  color: var(--gold-400);
  font-size: var(--f-2xs);
}

.page-home .home-hero-grid {
  display: grid;
  gap: 40px;
}

.page-home .home-hero-title-block {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 34ch;
}

.page-home .home-h1 {
  font-family: var(--sans);
  font-weight: 900;
  font-size: var(--f-4xl);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--text-primary);
  margin: 0;
}

.page-home .home-h1-sub {
  display: block;
  font-family: var(--serif);
  font-weight: 500;
  font-size: var(--f-lg);
  line-height: 1.3;
  letter-spacing: .01em;
  color: var(--gold-400);
  margin-top: 10px;
}

.page-home .home-lede {
  font-size: var(--f-sm);
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 32ch;
  margin: 0;
}

.page-home .home-hero-meta {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--line-400);
}

.page-home .home-hero-version {
  font-size: var(--f-lg);
  color: var(--vermilion-500);
  letter-spacing: .04em;
}

.page-home .home-hero-meta-note {
  font-size: var(--f-xs);
  color: var(--text-muted);
  letter-spacing: .04em;
}

/* tag wall */
.page-home .home-tagwall {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 20px;
  background:
    linear-gradient(180deg, rgba(12, 36, 64, .9), rgba(5, 19, 31, .6));
  border: var(--home-line);
  border-top: 2px solid var(--vermilion-500);
  clip-path: polygon(0 0, calc(100% - var(--home-cut)) 0, 100% var(--home-cut), 100% 100%, 0 100%);
}

.page-home .home-tagwall .label {
  color: var(--text-muted);
}

.page-home .home-tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-home .home-tag-list .tag {
  display: block;
  padding: 10px 12px;
  font-size: var(--f-xs);
  line-height: 1.4;
  letter-spacing: .05em;
  color: var(--text-primary);
  background: var(--ink-800);
  border: 1px solid var(--line-400);
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: color .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease), box-shadow .16s var(--ease);
}

.page-home .home-tag-list .tag:hover,
.page-home .home-tag-list .tag:focus-visible {
  color: var(--gold-400);
  background: var(--ink-950);
  border-color: var(--vermilion-500);
  box-shadow: 0 0 0 1px rgba(255, 106, 43, .35), 0 0 22px rgba(255, 106, 43, .18);
  outline: none;
}

.page-home .home-tagwall-figure {
  margin: 4px 0 0;
  border: var(--home-line);
  overflow: hidden;
}

.page-home .home-tagwall-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(.85);
}

/* ============ 通用 section head ============ */
.page-home .home-h2 {
  font-family: var(--sans);
  font-weight: 900;
  font-size: var(--f-2xl);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--text-primary);
  margin: 0;
}

.page-home .home-section-head {
  display: grid;
  gap: 12px;
  max-width: 60ch;
  margin-bottom: 36px;
}

.page-home .home-section-lede {
  font-size: var(--f-sm);
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
  max-width: 56ch;
}

/* ============ 入口识别 ============ */
.page-home .home-entry {
  padding: 56px 0;
  border-top: 1px solid var(--line-400);
  border-bottom: 1px solid var(--line-400);
  background: var(--ink-800);
}

.page-home .home-entry-grid {
  display: grid;
  gap: 28px;
}

.page-home .home-entry-head {
  display: grid;
  gap: 12px;
}

.page-home .home-entry-note {
  font-size: var(--f-sm);
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
  max-width: 44ch;
}

.page-home .home-entry-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line-400);
}

.page-home .home-entry-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-400);
}

.page-home .home-entry-item dt {
  font-size: var(--f-2xs);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.page-home .home-entry-item dd {
  margin: 0;
  font-size: var(--f-md);
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.page-home .home-entry-item dd.mono {
  font-family: var(--mono);
  font-weight: 500;
  font-size: var(--f-sm);
  letter-spacing: .04em;
  color: var(--gold-400);
}

/* ============ 三层结构 ============ */
.page-home .home-layers {
  padding: 72px 0;
  background:
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(74, 95, 120, .14) 79px 80px);
}

.page-home .home-layers-grid {
  display: grid;
  gap: 36px;
}

.page-home .home-layer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  position: relative;
}

.page-home .home-layer-item {
  position: relative;
  padding: 20px 18px 20px 56px;
  background: var(--ink-800);
  border: var(--home-line);
  border-left: 2px solid var(--vermilion-500);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-home .home-layer-item--l1 {
  margin-left: 0;
}
.page-home .home-layer-item--l2 {
  margin-left: 18px;
  border-left-color: var(--gold-400);
}
.page-home .home-layer-item--l3 {
  margin-left: 36px;
  border-left-color: var(--mint-400);
}

.page-home .home-layer-code {
  position: absolute;
  left: 18px;
  top: 22px;
  font-size: var(--f-xs);
  color: var(--gold-400);
  letter-spacing: .08em;
}

.page-home .home-layer-name {
  font-family: var(--sans);
  font-weight: 700;
  font-size: var(--f-md);
  line-height: 1.3;
  color: var(--text-primary);
  margin: 0 0 8px;
}

.page-home .home-layer-desc {
  font-size: var(--f-xs);
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
  max-width: 52ch;
}

.page-home .home-layers-side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-home .home-layers-figure {
  margin: 0;
  border: var(--home-line);
  background: var(--ink-950);
  overflow: hidden;
}

.page-home .home-layers-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.page-home .home-layers-figure figcaption {
  padding: 12px 14px;
  font-size: var(--f-2xs);
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--text-muted);
  border-top: var(--home-line);
}

.page-home .home-layers-cta {
  justify-self: start;
}

/* ============ 版本对照条 ============ */
.page-home .home-compare {
  position: relative;
  padding: 72px 0;
  background: var(--ink-950);
  overflow: hidden;
  isolation: isolate;
}

.page-home .home-compare-media {
  position: absolute;
  left: -8%;
  top: 50%;
  width: min(52%, 620px);
  transform: translateY(-50%);
  opacity: .12;
  pointer-events: none;
  z-index: 0;
}

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

.page-home .home-compare > .shell {
  position: relative;
  z-index: 1;
}

.page-home .home-compare-bar {
  display: grid;
  gap: 12px;
  background: var(--ink-800);
  border: var(--home-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--home-cut)), calc(100% - var(--home-cut)) 100%, 0 100%);
  overflow: hidden;
}

.page-home .home-compare-col {
  padding: 22px 20px;
}

.page-home .home-compare-col--old {
  background: rgba(74, 95, 120, .16);
}

.page-home .home-compare-col--new {
  border-top: 2px solid var(--vermilion-500);
  background: rgba(12, 36, 64, .55);
}

.page-home .home-compare-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--slate-600);
}

.page-home .home-compare-head .mono {
  font-size: var(--f-xs);
  color: var(--gold-400);
  letter-spacing: .08em;
}

.page-home .home-compare-head h3 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: var(--f-sm);
  letter-spacing: .04em;
  color: var(--text-primary);
  margin: 0;
}

.page-home .home-compare-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-home .home-compare-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  font-size: var(--f-xs);
  letter-spacing: .04em;
  color: var(--text-primary);
  background: rgba(5, 19, 31, .5);
  border-left: 2px solid transparent;
  transition: border-color .16s var(--ease), background .16s var(--ease), color .16s var(--ease);
}

.page-home .home-compare-list li:hover {
  border-left-color: var(--gold-400);
  background: rgba(242, 179, 61, .07);
  color: var(--gold-400);
}

.page-home .home-compare-shift {
  font-size: var(--f-2xs);
  letter-spacing: .12em;
  color: var(--vermilion-500);
  text-transform: uppercase;
}

.page-home .home-compare-tail {
  margin: 24px 0 0;
  font-size: var(--f-sm);
  line-height: 1.75;
  color: var(--text-muted);
  max-width: 62ch;
}

.page-home .home-compare-tail a {
  color: var(--gold-400);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-600);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-home .home-compare-tail a:hover {
  color: var(--vermilion-500);
  border-bottom-color: var(--vermilion-500);
}

/* ============ 维护节奏 ============ */
.page-home .home-rhythm {
  padding: 72px 0;
  border-top: 1px solid var(--line-400);
  background: var(--ink-800);
}

.page-home .home-rhythm-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-400);
  border: var(--home-line);
}

.page-home .home-rhythm-item {
  padding: 22px 20px;
  background: var(--ink-900);
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-home .home-rhythm-key {
  font-size: var(--f-2xs);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold-400);
}

.page-home .home-rhythm-name {
  font-family: var(--sans);
  font-weight: 700;
  font-size: var(--f-md);
  line-height: 1.3;
  color: var(--text-primary);
  margin: 0;
}

.page-home .home-rhythm-item p {
  font-size: var(--f-xs);
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
}

/* ============ 栏目去向索引 ============ */
.page-home .home-index {
  padding: 72px 0 80px;
}

.page-home .home-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-400);
}

.page-home .home-index-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  grid-template-areas:
    "no link"
    "no desc";
  gap: 4px 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-400);
  transition: background .16s var(--ease);
}

.page-home .home-index-item:hover {
  background: rgba(12, 36, 64, .5);
}

.page-home .home-index-no {
  grid-area: no;
  align-self: start;
  padding-top: 2px;
  font-size: var(--f-xs);
  color: var(--vermilion-500);
  letter-spacing: .08em;
}

.page-home .home-index-link {
  grid-area: link;
  font-family: var(--sans);
  font-weight: 700;
  font-size: var(--f-md);
  color: var(--text-primary);
  text-decoration: none;
  transition: color .16s var(--ease);
}

.page-home .home-index-link:hover {
  color: var(--gold-400);
}

.page-home .home-index-item p {
  grid-area: desc;
  margin: 0;
  font-size: var(--f-xs);
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 52ch;
}

.page-home .home-index-tail {
  margin: 26px 0 0;
  font-size: var(--f-xs);
  line-height: 1.75;
  letter-spacing: .03em;
  color: var(--text-muted);
  max-width: 58ch;
}

.page-home .home-index-tail a {
  color: var(--gold-400);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-600);
}

.page-home .home-index-tail a:hover {
  color: var(--vermilion-500);
  border-bottom-color: var(--vermilion-500);
}

/* ============ 中屏 ============ */
@media (min-width: 720px) {
  .page-home .home-hero {
    padding: 128px 0 72px;
  }

  .page-home .home-entry-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }

  .page-home .home-entry-item {
    border-bottom: 1px solid var(--line-400);
  }

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

  .page-home .home-index-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }
}

/* ============ 桌面 12 列拼贴 ============ */
@media (min-width: 960px) {
  .page-home .home-hero-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 24px;
    align-items: start;
  }

  .page-home .home-hero-title-block {
    grid-column: 1 / span 7;
    padding-right: 24px;
    border-right: 1px solid var(--line-400);
  }

  .page-home .home-tagwall {
    grid-column: 8 / span 5;
    margin-bottom: -88px;
  }

  .page-home .home-entry-grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }

  .page-home .home-layers-grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }

  .page-home .home-compare-bar {
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }

  .page-home .home-compare-col--new {
    border-top: 0;
    border-left: 2px solid var(--vermilion-500);
  }

  .page-home .home-index-item {
    grid-template-columns: 52px 1fr;
    padding: 22px 0;
  }
}

@media (min-width: 1240px) {
  .page-home .home-hero {
    padding: 148px 0 88px;
  }

  .page-home .home-tagwall {
    margin-bottom: -120px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .home-tag-list .tag,
  .page-home .home-compare-list li,
  .page-home .home-index-item,
  .page-home .home-index-link,
  .page-home .home-compare-tail a,
  .page-home .home-index-tail a {
    transition: none;
  }
}
</main>