.page-home {
  --home-grid-line: rgba(46, 58, 114, .5);
  --home-glow: rgba(216, 166, 74, .12);
  background:
    linear-gradient(transparent 71px, var(--home-grid-line) 71px, var(--home-grid-line) 72px, transparent 72px),
    linear-gradient(90deg, transparent 71px, var(--home-grid-line) 71px, var(--home-grid-line) 72px, transparent 72px),
    var(--c-ink);
  background-size: 72px 72px, 72px 72px, auto;
}

/* ---------- 首屏封面 ---------- */
.page-home .cover {
  position: relative;
  background: var(--grad-dusk);
  border-bottom: 2px solid var(--c-line);
  padding-block: clamp(1.5rem, 4vw, 3rem) clamp(2rem, 5vw, 3.5rem);
  overflow: hidden;
}
.page-home .cover::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: -2px;
  height: 3px;
  background: var(--grad-gold);
  opacity: .8;
}
.page-home .cover__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-items: start;
}
.page-home .cover__visual {
  margin: 0;
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard-lg);
  background: var(--c-deep);
  overflow: hidden;
}
.page-home .cover__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 26rem;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}
.page-home .cover__body {
  min-width: 0;
}
.page-home .cover__body h1 {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 5.5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--c-text);
  margin: .75rem 0 0;
  max-width: 20ch;
}
.page-home .cover__lead {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-muted);
  max-width: 34em;
  margin: 1rem 0 0;
}
.page-home .cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: clamp(1.25rem, 3vw, 1.85rem);
}
.page-home .cover__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 3vw, 2.25rem);
  margin: clamp(1.5rem, 3.5vw, 2.25rem) 0 0;
  padding-top: 1.1rem;
  border-top: 2px solid var(--c-line);
}
.page-home .cover__fact {
  min-width: 5.5rem;
}
.page-home .cover__fact dt {
  font-family: var(--font-body);
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--c-muted);
}
.page-home .cover__fact dd {
  margin: .35rem 0 0;
  font-family: var(--font-head);
  font-size: 1.35rem;
  color: var(--c-gold);
}

/* ---------- 规则前 3 条索引块 ---------- */
.page-home .cover__index {
  margin-top: clamp(2rem, 5vw, 3.25rem);
}
.page-home .cover__index-head {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding-bottom: .85rem;
  border-bottom: 2px solid var(--c-line);
}
.page-home .cover__index-tag {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--c-gold);
  border: 1px solid var(--c-gold);
  padding: .2rem .5rem;
}
.page-home .cover__index-head h2 {
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  letter-spacing: -.01em;
  color: var(--c-text);
  margin: 0;
}
.page-home .rule-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-home .rule-list__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(.85rem, 2.5vw, 1.5rem);
  align-items: start;
  padding: clamp(1rem, 2.5vw, 1.4rem) 0;
  border-bottom: 2px solid var(--c-line);
  position: relative;
  transition: background-color .14s var(--ease), transform .14s var(--ease);
}
.page-home .rule-list__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: clamp(1rem, 2.5vw, 1.4rem);
  bottom: clamp(1rem, 2.5vw, 1.4rem);
  width: 3px;
  background: var(--c-gold);
  opacity: .85;
}
.page-home .rule-list__item:hover {
  background-color: var(--c-mid);
  transform: translateY(-2px);
}
.page-home .rule-list__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4.5vw, 2.4rem);
  line-height: 1;
  color: var(--c-gold);
  letter-spacing: .04em;
  padding-left: .85rem;
}
.page-home .rule-list__body h3 {
  font-family: var(--font-head);
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  letter-spacing: -.01em;
  color: var(--c-text);
  margin: 0;
}
.page-home .rule-list__body p {
  font-family: var(--font-body);
  font-size: .95rem;
  line-height: 1.85;
  color: var(--c-muted);
  margin: .55rem 0 0;
  max-width: 40em;
}
.page-home .cover__index-note {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .03em;
  color: var(--c-muted);
  margin: 1rem 0 0;
}

/* ---------- 双端入口 ---------- */
.page-home .entry__grid {
  display: grid;
  gap: var(--gap);
  align-items: start;
}
.page-home .entry__card {
  position: relative;
  background: var(--c-mid);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  padding: clamp(1.25rem, 3vw, 1.85rem);
  transition: transform .14s var(--ease), box-shadow .14s var(--ease), border-color .14s var(--ease);
}
.page-home .entry__card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hard-lg);
  border-color: var(--c-gold);
}
.page-home .entry__card h3 {
  font-family: var(--font-head);
  font-size: clamp(1.1rem, 2.8vw, 1.4rem);
  letter-spacing: -.01em;
  color: var(--c-text);
  margin: .85rem 0 0;
}
.page-home .entry__card p {
  font-family: var(--font-body);
  font-size: .95rem;
  line-height: 1.85;
  color: var(--c-muted);
  margin: .85rem 0 0;
}
.page-home .entry__list {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}
.page-home .entry__list li {
  position: relative;
  padding-left: 1.1rem;
  font-family: var(--font-body);
  font-size: .92rem;
  line-height: 1.75;
  color: var(--c-text);
}
.page-home .entry__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: .5rem;
  height: 2px;
  background: var(--c-gold);
}
.page-home .entry__media {
  margin: 1.35rem 0 0;
  border: 2px solid var(--c-line);
  background: var(--c-deep);
  overflow: hidden;
}
.page-home .entry__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-home .entry__card .link-arrow {
  display: inline-block;
  margin-top: 1.25rem;
}
.page-home .entry__card--desktop {
  margin-top: 0;
}

/* ---------- 最近更新带 ---------- */
.page-home .updates {
  border-top: 2px solid var(--c-line);
  border-bottom: 2px solid var(--c-line);
  background: var(--c-deep);
}
.page-home .updates__lead {
  font-family: var(--font-body);
  font-size: .98rem;
  line-height: 1.85;
  color: var(--c-muted);
  max-width: 46em;
  margin: 1.1rem 0 0;
}
.page-home .updates__band {
  margin-top: clamp(1.25rem, 3vw, 1.85rem);
  border-block: 2px solid var(--c-line);
  background:
    radial-gradient(circle at 18% 50%, var(--home-glow), transparent 55%),
    var(--grad-dusk);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.page-home .updates__band:focus-visible {
  outline: 2px solid var(--c-gold-lt);
  outline-offset: -4px;
}
.page-home .updates__track {
  display: flex;
  gap: 0;
  min-width: max-content;
  padding: 0;
}
.page-home .updates__node {
  scroll-snap-align: start;
  flex: 0 0 78vw;
  max-width: 20rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  border-right: 2px solid var(--c-line);
  position: relative;
}
.page-home .updates__node::before {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(1.1rem, 3vw, 1.6rem);
  width: 2.5rem;
  height: 3px;
  background: var(--grad-gold);
}
.page-home .updates__period {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .06em;
  color: var(--c-gold);
}
.page-home .updates__node h3 {
  font-family: var(--font-head);
  font-size: 1.02rem;
  letter-spacing: -.01em;
  color: var(--c-text);
  margin: .75rem 0 0;
}
.page-home .updates__node p {
  font-family: var(--font-body);
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-muted);
  margin: .65rem 0 0;
}
.page-home .updates__node .tag {
  display: inline-block;
  margin-top: 1rem;
}
.page-home .updates__hint {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .03em;
  color: var(--c-muted);
  padding: .85rem clamp(1.1rem, 3vw, 1.6rem);
  border-top: 2px solid var(--c-line);
  margin: 0;
}

/* ---------- 资料库四大类 ---------- */
.page-home .library__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  align-items: start;
}
.page-home .library__pattern {
  margin: 0;
  border: 2px solid var(--c-line);
  background: var(--c-mid);
  overflow: hidden;
  max-width: 22rem;
}
.page-home .library__pattern img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .9;
}
.page-home .library__list {
  display: grid;
  gap: 0;
}
.page-home .library__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(.85rem, 2.5vw, 1.4rem);
  align-items: start;
  padding: clamp(.95rem, 2.4vw, 1.3rem) 0;
  border-bottom: 2px solid var(--c-line);
}
.page-home .library__item:first-child {
  border-top: 2px solid var(--c-line);
}
.page-home .library__num {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: .06em;
  color: var(--c-gold);
  padding-top: .15rem;
}
.page-home .library__item h3 {
  font-family: var(--font-head);
  font-size: 1.02rem;
  letter-spacing: -.01em;
  color: var(--c-text);
  margin: 0;
}
.page-home .library__item p {
  font-family: var(--font-body);
  font-size: .92rem;
  line-height: 1.85;
  color: var(--c-muted);
  margin: .5rem 0 0;
}
.page-home .library__more {
  margin: 1.5rem 0 0;
}

/* ---------- 反馈与帮助 ---------- */
.page-home .help {
  background: var(--c-deep);
  border-top: 2px solid var(--c-line);
}
.page-home .help__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: start;
}
.page-home .help__body h2 {
  font-family: var(--font-head);
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--c-text);
  margin: 1rem 0 0;
  max-width: 18ch;
}
.page-home .help__body p {
  font-family: var(--font-body);
  font-size: .98rem;
  line-height: 1.85;
  color: var(--c-muted);
  max-width: 40em;
  margin: 1rem 0 0;
}
.page-home .help__steps {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: .6rem;
}
.page-home .help__steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .7rem;
  align-items: baseline;
  font-family: var(--font-body);
  font-size: .94rem;
  color: var(--c-text);
}
.page-home .help__steps .num {
  font-family: var(--font-mono);
  color: var(--c-gold);
  border: 1px solid var(--c-gold);
  padding: .1rem .4rem;
  font-size: .8rem;
}
.page-home .help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
}
.page-home .help__aside {
  background: var(--c-mid);
  border: 2px solid var(--c-line);
  box-shadow: var(--shadow-hard);
  padding: clamp(1.2rem, 3vw, 1.7rem);
}
.page-home .help__aside h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  letter-spacing: -.01em;
  color: var(--c-text);
  margin: 0;
  padding-bottom: .8rem;
  border-bottom: 2px solid var(--c-line);
}
.page-home .help__aside p {
  font-family: var(--font-body);
  font-size: .92rem;
  line-height: 1.85;
  color: var(--c-muted);
  margin: 1rem 0 0;
}
.page-home .help__contact {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 2px solid var(--c-line);
}
.page-home .help__contact dt {
  font-family: var(--font-body);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--c-muted);
}
.page-home .help__contact dd {
  margin: .3rem 0 .9rem;
  font-family: var(--font-mono);
  font-size: .95rem;
  letter-spacing: .02em;
}
.page-home .help__contact dd:last-child {
  margin-bottom: 0;
}
.page-home .help__contact a {
  color: var(--c-gold);
  text-decoration: none;
  border-bottom: 1px solid var(--c-gold);
}
.page-home .help__contact a:hover {
  color: var(--c-gold-lt);
  border-color: var(--c-gold-lt);
}

/* ---------- 回到规则前 3 条 ---------- */
.page-home .back-to-rules {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 30;
  display: inline-block;
  font-family: var(--font-body);
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--c-deep);
  background: var(--grad-gold);
  border: 2px solid var(--c-gold);
  box-shadow: var(--shadow-hard);
  padding: .55rem .85rem;
  text-decoration: none;
  transition: transform .14s var(--ease), box-shadow .14s var(--ease);
}
.page-home .back-to-rules:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hard-lg);
}
.page-home .back-to-rules:focus-visible {
  outline: 2px solid var(--c-gold-lt);
  outline-offset: 3px;
}

/* ---------- 窄屏约束 ---------- */
@media (max-width: 47.99em) {
  .page-home .cover__facts {
    gap: 1rem 1.5rem;
  }
  .page-home .updates__node {
    flex-basis: 82vw;
  }
  .page-home .library__pattern {
    max-width: 100%;
  }
  .page-home .rule-list__num {
    padding-left: .6rem;
  }
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 48em) {
  .page-home .cover__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
    align-items: stretch;
  }
  .page-home .cover__visual {
    height: 100%;
  }
  .page-home .cover__visual img {
    height: 100%;
    max-height: 34rem;
    object-fit: cover;
  }
  .page-home .entry__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-home .entry__card--desktop {
    margin-top: 2.75rem;
  }
  .page-home .library__grid {
    grid-template-columns: minmax(0, 22rem) minmax(0, 1fr);
  }
  .page-home .help__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }
  .page-home .updates__node {
    flex-basis: 22rem;
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 68em) {
  .page-home .cover__grid {
    grid-template-columns: minmax(0, 22rem) minmax(0, 1fr);
  }
  .page-home .rule-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-home .rule-list__item {
    border-bottom: none;
    border-right: 2px solid var(--c-line);
    padding-inline: clamp(.85rem, 2vw, 1.5rem);
  }
  .page-home .rule-list__item:first-child {
    padding-left: 0;
  }
  .page-home .rule-list__item:last-child {
    border-right: none;
    padding-right: 0;
  }
  .page-home .rule-list__item::before {
    left: 0;
  }
  .page-home .rule-list__item:first-child::before {
    left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .rule-list__item,
  .page-home .entry__card,
  .page-home .back-to-rules {
    transition: none;
  }
  .page-home .rule-list__item:hover,
  .page-home .entry__card:hover,
  .page-home .back-to-rules:hover {
    transform: none;
  }
}
<<<END>>>