/* ===== 使用说明 · 规则手册 ===== */
.page-disclaimer{
  --rule-hair:rgba(11,30,58,.16);
  --rule-body:2.75rem;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
}

/* ---- 页首 ---- */
.page-disclaimer .rule-head{
  position:relative;
  overflow:hidden;
  background:var(--navy);
  color:var(--paper);
  border-bottom:var(--bd) solid var(--ink);
}
.page-disclaimer .rule-head::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right, rgba(246,241,231,.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(246,241,231,.07) 1px, transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
}
.page-disclaimer .rule-head::after{
  content:"";
  position:absolute;
  inset-block:0;
  inset-inline-start:0;
  width:6px;
  background:linear-gradient(180deg,var(--orange) 0 33%,var(--gold) 33% 66%,var(--teal) 66% 100%);
}
.page-disclaimer .rule-head__inner{
  position:relative;
  z-index:1;
  max-width:1240px;
  margin-inline:auto;
  padding:1.75rem 1.25rem 2rem;
}
.page-disclaimer .rule-head .breadcrumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  font-size:var(--fs-2);
  color:var(--paper-2);
  margin-bottom:1.2rem;
}
.page-disclaimer .rule-head .breadcrumbs a{
  color:var(--gold);
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.page-disclaimer .rule-head .breadcrumbs a:hover,
.page-disclaimer .rule-head .breadcrumbs a:focus-visible{
  border-bottom-color:var(--gold);
}
.page-disclaimer .rule-head .kicker{
  margin:0 0 .6rem;
  font-family:var(--font-mono);
  font-size:var(--fs-2);
  letter-spacing:.18em;
  color:var(--gold);
}
.page-disclaimer .rule-head h1{
  margin:0 0 1rem;
  font-family:var(--font-serif);
  font-weight:900;
  font-size:clamp(1.7rem,5.2vw,3.1rem);
  line-height:1.2;
  color:var(--paper);
  max-width:20em;
}
.page-disclaimer .rule-head .lede{
  margin:0;
  max-width:36em;
  font-size:var(--fs-3);
  line-height:1.85;
  color:var(--paper-2);
}
.page-disclaimer .rule-head__meta{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
  list-style:none;
  margin:1.4rem 0 0;
  padding:0;
}
.page-disclaimer .rule-chip{
  display:inline-block;
  padding:.3rem .65rem;
  font-family:var(--font-mono);
  font-size:var(--fs-1);
  letter-spacing:.04em;
  color:var(--paper);
  border:1px solid rgba(246,241,231,.45);
}
.page-disclaimer .rule-chip:nth-child(1){color:var(--gold);border-color:var(--gold);}
.page-disclaimer .rule-chip:nth-child(2){color:var(--teal);border-color:var(--teal);}
.page-disclaimer .rule-head__fig{
  position:relative;
  z-index:1;
  margin:0;
  border-top:3px solid var(--ink);
}
.page-disclaimer .rule-head__fig img{
  display:block;
  width:100%;
  height:auto;
  max-height:280px;
  object-fit:cover;
  object-position:center;
}

/* ---- 正文框架 ---- */
.page-disclaimer .rule-main{
  padding-block:1.75rem 2.75rem;
}
.page-disclaimer .rule-grid{
  max-width:1240px;
  margin-inline:auto;
  padding-inline:1.25rem;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:1.5rem;
}

/* ---- 章节索引 ---- */
.page-disclaimer .rule-nav{
  border-inline-start:3px solid var(--teal);
  padding:.15rem 0 .15rem .9rem;
}
.page-disclaimer .rule-nav__title{
  margin:0 0 .55rem;
  font-family:var(--font-mono);
  font-size:var(--fs-1);
  letter-spacing:.16em;
  color:var(--grey);
}
.page-disclaimer .rule-nav ol{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:.3rem .9rem;
}
.page-disclaimer .rule-nav a{
  display:inline-flex;
  align-items:baseline;
  gap:.4rem;
  padding:.2rem 0;
  font-size:var(--fs-2);
  color:var(--navy);
  text-decoration:none;
  border-bottom:1px solid transparent;
}
.page-disclaimer .rule-nav a:hover,
.page-disclaimer .rule-nav a:focus-visible{
  border-bottom-color:var(--orange);
  color:var(--orange-d);
}
.page-disclaimer .rule-nav a .num{
  font-size:.85em;
  color:var(--teal-d);
}

/* ---- 章节条目 ---- */
.page-disclaimer .rule-sec{
  display:grid;
  grid-template-columns:var(--rule-body) minmax(0,1fr);
  column-gap:.85rem;
  padding:1.4rem 0 1.6rem;
  border-top:1px solid var(--rule-hair);
  scroll-margin-top:5rem;
}
.page-disclaimer .rule-sec:first-child{
  border-top:3px solid var(--ink);
  padding-top:1.2rem;
}
.page-disclaimer .rule-sec__num{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:var(--fs-3);
  line-height:1.35;
  color:var(--teal-d);
  text-align:right;
  padding-inline-end:.55rem;
  border-inline-end:3px solid var(--teal);
}
.page-disclaimer .rule-sec__title{
  margin:0 0 .75rem;
  font-family:var(--font-serif);
  font-weight:800;
  font-size:clamp(1.15rem,3.6vw,1.55rem);
  line-height:1.35;
  color:var(--navy);
}
.page-disclaimer .rule-list{
  list-style:none;
  margin:0;
  padding:0;
}
.page-disclaimer .rule-list li{
  position:relative;
  padding:.55rem 0 .55rem 1.1rem;
  font-size:var(--fs-3);
  line-height:1.85;
  max-width:38em;
  border-top:1px dashed var(--rule-hair);
}
.page-disclaimer .rule-list li:first-child{
  border-top:0;
  padding-top:.1rem;
}
.page-disclaimer .rule-list li::before{
  content:"";
  position:absolute;
  inset-inline-start:0;
  inset-block-start:.95rem;
  width:6px;
  height:6px;
  background:var(--orange);
}
.page-disclaimer .rule-list a{
  color:var(--orange-d);
  text-decoration:none;
  border-bottom:1px solid rgba(196,58,0,.4);
}
.page-disclaimer .rule-list a:hover,
.page-disclaimer .rule-list a:focus-visible{
  border-bottom-color:var(--orange-d);
}
.page-disclaimer .rule-hl{
  background:linear-gradient(transparent 62%, rgba(255,195,0,.6) 62%);
  font-weight:500;
  color:var(--navy);
  padding:0 .1em;
}

/* ---- 补充说明折叠条 ---- */
.page-disclaimer .rule-fold{
  margin-top:1rem;
  max-width:38em;
  border:2px solid var(--ink);
  background:var(--paper-2);
}
.page-disclaimer .rule-fold summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.8rem;
  padding:.7rem .9rem;
  min-height:44px;
  font-size:var(--fs-2);
  font-weight:600;
  color:var(--navy);
  cursor:pointer;
  list-style:none;
}
.page-disclaimer .rule-fold summary::-webkit-details-marker{
  display:none;
}
.page-disclaimer .rule-fold summary::after{
  content:"＋";
  font-family:var(--font-mono);
  color:var(--orange-d);
  flex:0 0 auto;
}
.page-disclaimer .rule-fold[open] summary::after{
  content:"－";
}
.page-disclaimer .rule-fold__body{
  margin:0;
  padding:0 .9rem .9rem;
  font-size:var(--fs-2);
  line-height:1.85;
  color:#2A3348;
}

/* ---- 底部指引 ---- */
.page-disclaimer .rule-next{
  background:var(--paper-2);
  border-top:var(--bd) solid var(--ink);
  padding-block:2rem 2.25rem;
}
.page-disclaimer .rule-next__inner{
  max-width:1240px;
  margin-inline:auto;
  padding-inline:1.25rem;
}
.page-disclaimer .rule-next__title{
  margin:0 0 .5rem;
  font-family:var(--font-serif);
  font-weight:800;
  font-size:var(--fs-6);
  color:var(--navy);
}
.page-disclaimer .rule-next__desc{
  margin:0 0 1.2rem;
  max-width:34em;
  font-size:var(--fs-3);
  line-height:1.8;
  color:#2A3348;
}
.page-disclaimer .rule-next__grid{
  display:flex;
  flex-wrap:wrap;
  gap:.7rem;
}
.page-disclaimer .rule-next__link{
  text-decoration:none;
}
.page-disclaimer .rule-next__link::after{
  content:" →";
  font-family:var(--font-mono);
}

/* ---- 媒体查询 ---- */
@media (min-width:900px){
  .page-disclaimer .rule-head__inner{
    padding:2.5rem 2rem 2.5rem;
  }
  .page-disclaimer .rule-head__fig img{
    max-height:340px;
  }
  .page-disclaimer .rule-main{
    padding-block:2.5rem 3.5rem;
  }
  .page-disclaimer .rule-grid{
    grid-template-columns:200px minmax(0,1fr);
    gap:3rem;
    padding-inline:2rem;
  }
  .page-disclaimer .rule-nav{
    position:sticky;
    top:1.5rem;
    align-self:start;
  }
  .page-disclaimer .rule-nav ol{
    flex-direction:column;
    flex-wrap:nowrap;
    gap:.15rem;
  }
  .page-disclaimer .rule-sec{
    grid-template-columns:3.4rem minmax(0,1fr);
    column-gap:1.35rem;
    padding:2rem 0 2.25rem;
  }
  .page-disclaimer .rule-sec__num{
    font-size:var(--fs-4);
  }
  .page-disclaimer .rule-next__inner{
    padding-inline:2rem;
  }
}

@media (min-width:1280px){
  .page-disclaimer .rule-sec__title{
    font-size:var(--fs-6);
  }
  .page-disclaimer .rule-list li{
    font-size:var(--fs-4);
    line-height:1.9;
  }
}
</main>