.page-home *,
.page-home *::before,
.page-home *::after{ box-sizing: border-box; }

.page-home{
  --home-line: rgba(124,143,154,.26);
  --home-line-strong: rgba(124,143,154,.5);
  --home-text: #C9D6DE;
  --home-text-dim: #8FA3AE;
  background: var(--steel-deep);
  color: var(--home-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-home h1,
.page-home h2,
.page-home h3{ margin: 0; font-weight: 900; letter-spacing: -.02em; line-height: 1.08; }
.page-home p{ margin: 0; }
.page-home ul,
.page-home ol{ margin: 0; padding: 0; list-style: none; }
.page-home img{ max-width: 100%; height: auto; display: block; }
.page-home a{ color: inherit; }

/* ---------- 封面 ---------- */
.page-home .hero{
  background: var(--steel-deep);
  padding: clamp(44px,8vw,104px) 0 clamp(32px,5vw,64px);
  border-bottom: 1px solid var(--home-line);
}
.page-home .hero__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px,5vw,40px);
  align-items: end;
}
.page-home .hero__kicker{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--home-text-dim);
  margin-bottom: 18px;
}
.page-home .hero__kicker .mono{ color: var(--cyan-signal); }
.page-home .hero__title{
  font-size: clamp(2.1rem,7.4vw,4.4rem);
  color: var(--paper-warm);
  margin-bottom: 22px;
}
.page-home .hero__lede{
  font-family: var(--font-serif);
  font-size: clamp(1rem,2.4vw,1.22rem);
  line-height: 1.85;
  color: #D6E1E8;
  max-width: 34ch;
  border-left: 3px solid var(--sand-orange);
  padding-left: 16px;
}
.page-home .hero__meta{
  margin-top: 24px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan-dim);
  line-height: 1.9;
}
.page-home .hero__plate{ margin: 0; }
.page-home .hero__plate img{
  width: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 86%, 0 100%);
  filter: saturate(.7) brightness(.92);
}
.page-home .hero__cap{
  display: block;
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--home-text-dim);
  text-align: right;
}

/* ---------- 索引带 ---------- */
.page-home .indexband{
  background: var(--steel-mid);
  padding: clamp(40px,6vw,72px) 0;
  border-bottom: 1px solid var(--home-line);
}
.page-home .sec-head{
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  align-items: baseline;
  margin-bottom: clamp(24px,3.5vw,40px);
}
.page-home .sec-head__idx{
  grid-row: 1 / 3;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sand-orange);
}
.page-home .sec-head__title{
  font-size: clamp(1.4rem,3.4vw,2.2rem);
  color: var(--paper-warm);
}
.page-home .sec-head__note{
  grid-column: 2;
  font-size: 13px;
  color: var(--home-text-dim);
  max-width: 60ch;
}
.page-home .sec-head--paper .sec-head__title{ color: var(--ink-text); }
.page-home .sec-head--paper .sec-head__note{ color: #5C6E78; }
.page-home .sec-head--paper .sec-head__idx{ color: var(--sand-orange); }
.page-home .sec-head--ink .sec-head__title{ color: var(--paper-warm); }
.page-home .sec-head--ink .sec-head__note{ color: var(--home-text-dim); }

.page-home .indexband__groups{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--home-line);
  border: 1px solid var(--home-line);
}
.page-home .indexband__group{
  background: var(--steel-mid);
  padding: 20px 18px;
}
.page-home .indexband__gt{
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-signal);
  margin-bottom: 14px;
}
.page-home .indexband__list li{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-size: 15px;
  color: #DDE7ED;
  border-bottom: 1px dashed rgba(124,143,154,.2);
}
.page-home .indexband__list li:last-child{ border-bottom: 0; }
.page-home .indexband__code{
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--sand-soft);
  min-width: 52px;
}
.page-home .swatch{
  width: 10px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
  flex: 0 0 auto;
  background: var(--muted-steel);
}

.page-home .plates{
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(24px,3.5vw,36px);
}
.page-home .plate{
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 16px 18px;
  border: 1px solid var(--home-line-strong);
  background: rgba(10,26,36,.35);
  border-radius: var(--radius);
}
.page-home .plate__no{
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan-dim);
}
.page-home .plate__val{
  font-family: var(--font-mono);
  font-size: clamp(1.15rem,3vw,1.5rem);
  color: var(--paper-warm);
  letter-spacing: -.01em;
}
.page-home .plate__label{
  font-size: 13px;
  color: var(--home-text-dim);
  line-height: 1.6;
}
.page-home .indexband__more{ margin-top: 22px; }

/* ---------- 布局：侧栏 + 正文 ---------- */
.page-home .home-wrap{ padding: 0 var(--pad-x); }
.page-home .home-rail{ display: none; }

/* ---------- 通用章节 ---------- */
.page-home .home-sec{
  padding: clamp(40px,6vw,72px) 0;
  border-bottom: 1px solid var(--home-line);
}
.page-home .home-sec--paper{
  background: var(--paper-warm);
  color: var(--ink-text);
  border-radius: var(--radius);
  padding-left: clamp(16px,3vw,32px);
  padding-right: clamp(16px,3vw,32px);
  border-bottom-color: transparent;
}
.page-home .home-sec--mid{
  background: rgba(23,71,94,.55);
  border-radius: var(--radius);
  padding-left: clamp(16px,3vw,32px);
  padding-right: clamp(16px,3vw,32px);
  border-bottom-color: transparent;
}
.page-home .home-sec--ink{
  background: var(--slate-ink);
  border-radius: var(--radius);
  padding-left: clamp(16px,3vw,32px);
  padding-right: clamp(16px,3vw,32px);
  border-bottom-color: transparent;
}
.page-home .home-sec__link{ margin-top: 26px; }

/* ---------- 档位卡片 ---------- */
.page-home .tiers{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-home .tier{
  padding: 22px 20px 24px;
  border: 1px solid var(--home-line-strong);
  border-left: 4px solid var(--sand-orange);
  background: rgba(10,26,36,.4);
  border-radius: var(--radius);
}
.page-home .tier--t1{ border-left-color: var(--cyan-signal); }
.page-home .tier--t2{ border-left-color: var(--sand-orange); }
.page-home .tier--t3{ border-left-color: var(--violet-signal); }
.page-home .tier__code{
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--sand-soft);
}
.page-home .tier__name{
  font-size: clamp(1.2rem,3vw,1.5rem);
  color: var(--paper-warm);
  margin: 8px 0 12px;
}
.page-home .tier__desc{
  font-size: 15px;
  color: #C6D3DB;
  max-width: 40ch;
}
.page-home .tier__list{
  margin: 16px 0 18px;
  display: grid;
  gap: 8px;
}
.page-home .tier__list li{
  font-size: 14px;
  color: var(--home-text-dim);
  padding-left: 16px;
  position: relative;
}
.page-home .tier__list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 1px;
  background: var(--sand-soft);
}
.page-home .tier__fit{
  font-size: 13px;
  color: #9FB2BC;
  border-top: 1px solid var(--home-line);
  padding-top: 12px;
  line-height: 1.7;
}
.page-home .tier__fit .mono{
  color: var(--sand-orange);
  margin-right: 6px;
}

/* ---------- 专利族 ---------- */
.page-home .families{ display: grid; gap: clamp(24px,4vw,40px); }
.page-home .fams{ display: grid; gap: 0; margin-top: 8px; }
.page-home .fam{
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line-dark);
}
.page-home .fam:last-child{ border-bottom: 1px solid var(--line-dark); }
.page-home .fam .swatch{ margin-top: 6px; width: 12px; height: 12px; }
.page-home .fam__head{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}
.page-home .fam__code{
  font-size: 12px;
  letter-spacing: .1em;
  color: #4A5C66;
}
.page-home .fam__name{
  font-weight: 900;
  font-size: 1.05rem;
  color: var(--ink-text);
  letter-spacing: -.01em;
}
.page-home .fam__desc{
  font-size: 15px;
  color: #3E4E58;
  max-width: 56ch;
  line-height: 1.75;
}
.page-home .families__fig{ margin: 0; }

/* ---------- 保养周期 ---------- */
.page-home .cycle{
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-home .cycle__band{
  padding: 20px 18px 22px;
  border: 1px solid var(--home-line-strong);
  border-radius: var(--radius);
  background: rgba(10,26,36,.4);
}
.page-home .cycle__band--short{ border-top: 4px solid var(--cyan-signal); }
.page-home .cycle__band--long{ border-top: 4px solid var(--sand-orange); }
.page-home .cycle__head{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 14px;
}
.page-home .cycle__tag{
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan-signal);
}
.page-home .cycle__band--long .cycle__tag{ color: var(--sand-orange); }
.page-home .cycle__freq{
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--paper-warm);
  letter-spacing: -.01em;
}
.page-home .cycle__scale{
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}
.page-home .cycle__scale span{
  min-width: 30px;
  text-align: center;
  padding: 5px 0;
  font-size: 12px;
  color: #B7C6CF;
  border: 1px solid var(--home-line);
  border-radius: 2px;
}
.page-home .cycle__band--short .cycle__scale span:nth-child(-n+3){ border-color: var(--cyan-dim); color: var(--cyan-signal); }
.page-home .cycle__band--long .cycle__scale span:nth-child(-n+3){ border-color: var(--sand-orange); color: var(--sand-soft); }
.page-home .cycle__desc{
  font-size: 14px;
  color: var(--home-text-dim);
  max-width: 54ch;
  line-height: 1.75;
}
.page-home .cycle__fig{ margin: 0; }

/* ---------- 响应时限 ---------- */
.page-home .support{ display: grid; gap: clamp(20px,3vw,32px); }
.page-home .support__fig{ margin: 0; }
.page-home .rtable{
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: rgba(10,26,36,.35);
}
.page-home .rtable__cap{
  caption-side: top;
  text-align: left;
  font-size: 12.5px;
  color: var(--home-text-dim);
  padding-bottom: 12px;
  line-height: 1.7;
}
.page-home .rtable th,
.page-home .rtable td{
  text-align: left;
  padding: 11px 12px;
  border-bottom: 1px solid var(--home-line);
}
.page-home .rtable thead th{
  background: var(--slate-ink);
  color: var(--paper-warm);
  font-size: 12px;
  letter-spacing: .1em;
  font-weight: 700;
}
.page-home .rtable tbody th{
  font-weight: 500;
  color: var(--cyan-signal);
  font-size: 12.5px;
  letter-spacing: .08em;
}
.page-home .rtable tbody td{ color: #CBD8E0; }
.page-home .rtable tbody tr:hover td,
.page-home .rtable tbody tr:hover th{ background: rgba(53,224,192,.09); }
.page-home .support__note{
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--home-text-dim);
  max-width: 60ch;
  line-height: 1.75;
}

/* ---------- 专题 ---------- */
.page-home .topics{
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-home .topic{
  padding: 20px 18px 22px;
  border: 1px solid var(--home-line);
  border-radius: var(--radius);
  background: rgba(10,26,36,.3);
}
.page-home .topic__meta{
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--home-text-dim);
  margin-bottom: 10px;
}
.page-home .topic__no{
  color: var(--steel-deep);
  background: var(--sand-soft);
  padding: 1px 7px;
  border-radius: 2px;
  font-weight: 700;
}
.page-home .topic__title{
  font-size: 1.1rem;
  color: var(--paper-warm);
  margin-bottom: 10px;
  line-height: 1.35;
}
.page-home .topic__desc{
  font-size: 14.5px;
  color: #BCCAD3;
  line-height: 1.78;
  max-width: 46ch;
}
.page-home .topic__tags{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.page-home .tag{
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  padding: 3px 9px;
  border: 1px solid var(--home-line-strong);
  border-radius: 2px;
  color: #B9C8D1;
}

/* ---------- 咨询 ---------- */
.page-home .inquiry__lead{
  font-size: 15.5px;
  color: #C2D0D9;
  max-width: 62ch;
  line-height: 1.8;
}
.page-home .inquiry__list{
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 22px;
}
.page-home .inquiry__list li{
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 14.5px;
  color: var(--home-text-dim);
  border-bottom: 1px dashed rgba(124,143,154,.22);
  padding-bottom: 10px;
}
.page-home .inquiry__code{
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sand-soft);
  min-width: 54px;
}

/* ---------- 图版 ---------- */
.page-home .home-fig{
  border: 1px solid var(--home-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--slate-ink);
}
.page-home .home-fig img{
  width: 100%;
  object-fit: cover;
  filter: saturate(.72) brightness(.9);
}
.page-home .home-fig--square img{ aspect-ratio: 1 / 1; }
.page-home .home-fig--wide img{ aspect-ratio: 16 / 10; }
.page-home .home-fig__cap{
  display: block;
  padding: 10px 12px;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--home-text-dim);
  border-top: 1px solid var(--home-line);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px){
  .page-home .indexband__groups{ grid-template-columns: repeat(2, 1fr); }
  .page-home .plates{ grid-template-columns: repeat(2, 1fr); }
  .page-home .tiers{ grid-template-columns: repeat(2, 1fr); }
  .page-home .tier--t3{ grid-column: 1 / -1; }
  .page-home .topics{ grid-template-columns: repeat(2, 1fr); }
  .page-home .inquiry__list{ grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px){
  .page-home .hero__grid{ grid-template-columns: repeat(12, 1fr); gap: var(--gap); }
  .page-home .hero__lead{ grid-column: 1 / 8; }
  .page-home .hero__plate{ grid-column: 9 / 13; }
  .page-home .hero__lede{ max-width: 38ch; }
  .page-home .plates{ grid-template-columns: repeat(4, 1fr); }
  .page-home .indexband__groups{ grid-template-columns: repeat(4, 1fr); }
  .page-home .families{ grid-template-columns: 1.35fr .9fr; align-items: start; }
  .page-home .families__fig{ position: sticky; top: 96px; }
  .page-home .cycle{ grid-template-columns: 1fr 1fr .8fr; align-items: start; }
  .page-home .support{ grid-template-columns: .85fr 1.3fr; align-items: start; }
  .page-home .topics{ grid-template-columns: repeat(3, 1fr); }
  .page-home .topic:nth-child(2){ transform: translateY(18px); }
  .page-home .inquiry{ display: grid; grid-template-columns: 1fr 1fr; gap: 0 40px; align-items: start; }
  .page-home .inquiry .sec-head{ grid-column: 1; }
  .page-home .inquiry__lead{ grid-column: 1; }
  .page-home .inquiry .home-sec__link{ grid-column: 1; }
  .page-home .inquiry__list{ grid-column: 2; grid-row: 1 / 4; margin-top: 0; }
}

@media (min-width: 1040px){
  .page-home .home-wrap{
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    gap: clamp(24px,4vw,56px);
    max-width: var(--w-max);
    margin-inline: auto;
  }
  .page-home .home-rail{
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
    padding-top: clamp(40px,6vw,72px);
  }
  .page-home .home-rail__title{
    font-size: 11px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--muted-steel);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--home-line);
    margin-bottom: 14px;
  }
  .page-home .toc__list{ display: grid; gap: 2px; }
  .page-home .toc__link{
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 9px 0 9px 12px;
    font-size: 13.5px;
    color: var(--home-text-dim);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
  }
  .page-home .toc__link .mono{
    font-size: 11px;
    letter-spacing: .1em;
    color: var(--muted-steel);
  }
  .page-home .toc__link:hover,
  .page-home .toc__link:focus-visible{
    color: var(--paper-warm);
    border-left-color: var(--sand-orange);
    background: rgba(23,71,94,.4);
  }
  .page-home .toc__link.is-active,
  .page-home .toc__link[aria-current="true"]{
    color: var(--cyan-signal);
    border-left-color: var(--cyan-signal);
  }
  .page-home .toc__link.is-active .mono,
  .page-home .toc__link[aria-current="true"] .mono{ color: var(--cyan-signal); }
}

@media (min-width: 1180px){
  .page-home .tiers{ grid-template-columns: .92fr 1.22fr 1fr; }
  .page-home .tier--t3{ grid-column: auto; }
}

@media (prefers-reduced-motion: reduce){
  .page-home .toc__link,
  .page-home .topic:nth-child(2){ transition: none; transform: none; }
}