:root {
  --blue: #003a8d;
  --ink: #1c2836;
  --muted: #5d6b7c;
  --faint: #8b97a6;
  --line: #e3e8ee;
  --max: 1120px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { overflow-y: scroll; scrollbar-gutter: stable; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(70% 42% at 100% -8%, rgba(0, 151, 167, 0.14), transparent 58%),
    linear-gradient(180deg, rgba(0, 58, 141, 0.09) 0, rgba(0, 58, 141, 0.04) 280px, rgba(255, 255, 255, 0) 640px),
    #fff;
  font-size: 16px;
  line-height: 1.5;
}
a { color: var(--blue); text-decoration: none; }
img { display: block; max-width: 100%; }
button, input { font: inherit; color: inherit; }
.mono { font-family: "Cascadia Mono", Consolas, monospace; }
.vh { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.wrap { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }

.chrome {
  position: sticky;
  top: 0;
  z-index: 40;
  background: transparent;
}
.chrome.stuck {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0.18) 68%, rgba(255, 255, 255, 0) 100%);
  backdrop-filter: blur(12px);
}
.topbar { height: 64px; }
.bar {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 64px;
}
.brand { display: flex; align-items: center; flex: 0 0 auto; margin-right: auto; height: 64px; }
.brand img { height: 44px; width: auto; max-width: none; }
.nav, .foot-nav { display: flex; gap: 4px; }
.nav a, .lang, .lang a { white-space: nowrap; }
.nav a, .lang a, .foot-nav a { padding: 8px 12px; color: var(--muted); }
html[lang="en"] .nav a,
html[lang="en"] .foot-nav a {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 13px;
}
.nav a[aria-current="page"], .lang a[aria-pressed="true"] { color: var(--blue); }
.lang { display: flex; align-items: center; gap: 2px; }
.lang span { color: var(--faint); }

.crumbbar { height: 40px; }
.crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
  overflow: hidden;
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}
.crumbs li { display: flex; align-items: center; gap: 8px; min-width: 0; }
.crumbs a { color: var(--muted); flex: none; }
.crumbs a:hover { color: var(--blue); }
.crumbs .sep { color: var(--faint); flex: none; }
.crumbs .here {
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--ink);
}

.billboard { padding: 40px 0 12px; }
.billboard-short { padding: 40px 0 0; }
.eyebrow {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: rgba(0, 58, 141, 0.62);
}
h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.08;
}
.lead, .prose { color: var(--muted); line-height: 1.75; }
.lead { margin: 16px 0 0; max-width: 40em; font-size: 18px; }
.page { padding: 40px 0 48px; }
.page h1 { font-size: 32px; }
.subhead, .family { margin: 8px 0 0; color: var(--muted); }
.desc { margin: 22px 0 0; max-width: 42em; }
.band { padding: 56px 0 8px; }
.band:last-child { padding-bottom: 56px; }
.band-tight { padding-top: 12px; }
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: start;
}
.statement {
  margin: 0;
  font-size: 30px;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.35;
}
h2 { margin: 28px 0 12px; font-size: 14px; font-weight: 600; }
.band h2, .page > .wrap > h2:first-child { margin-top: 0; }

.search { position: relative; margin-top: 28px; max-width: 420px; }
.search input {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid rgba(0, 58, 141, 0.22);
  padding: 12px 0;
  outline: none;
}
.search input:focus { border-bottom-color: var(--blue); }
.search input::placeholder { color: var(--faint); }
.find-hint { margin: 12px 0 0; max-width: 42em; color: var(--muted); font-size: 14px; line-height: 1.6; }
.search-hit a:last-child { font-size: 13px; text-align: right; word-break: break-all; }
.part-index { list-style: none; margin: 8px 0 0; padding: 0; columns: 2; column-gap: 48px; }
.part-index li { break-inside: avoid; display: flex; justify-content: space-between; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.part-index a:last-child { color: var(--muted); font-size: 13px; text-align: right; word-break: break-all; }
@media (max-width: 720px) { .part-index { columns: 1; } }

.cat-list { margin: 8px 0 0; padding: 0; list-style: none; }
.cat-row {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  color: inherit;
}
.cat-list > li:last-child .cat-row { border-bottom: 1px solid var(--line); }
.cat-row strong { display: block; font-weight: 500; font-size: 22px; }
.cat-row small { color: var(--muted); }
.cat-row:hover strong { color: var(--blue); }
.idx, .go { color: var(--faint); }

.subs { display: flex; flex-wrap: wrap; gap: 4px 22px; margin: 18px 0 8px; }
.subs a {
  padding: 8px 0;
  color: var(--muted);
  border-bottom: 2px solid transparent;
}
.subs a[aria-current="true"] { color: var(--blue); border-bottom-color: var(--blue); }
.table-scroll { overflow-x: auto; }
table { width: max-content; min-width: 100%; border-collapse: separate; border-spacing: 0; }
th, td { text-align: left; padding: 14px 22px 14px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 13px; font-weight: 500; color: var(--muted); }
.col-name { display: block; }
.col-unit { display: block; margin-top: 2px; color: var(--faint); font-size: 11px; font-weight: 400; }
th.model, td.model {
  position: sticky;
  left: 0;
  z-index: 1;
  min-width: 112px;
  padding-right: 18px;
  background: transparent;
  font-weight: 500;
}
th.model { z-index: 2; }
tbody th.model { font-size: 16px; color: var(--ink); }
th.model a, td.model a { font-weight: 600; }
.table-scroll.scrolled th.model {
  background: #f4f7fb;
  box-shadow: 12px 0 16px -14px rgba(0, 58, 141, 0.28);
}
td.mono { white-space: nowrap; }
td.prose-cell {
  min-width: 180px;
  max-width: 280px;
  white-space: pre-line;
  color: var(--ink);
  font-size: 13px;
  line-height: 1.45;
}
tr:hover th.model,
tr:hover td.model,
tr:hover td { background: rgba(0, 58, 141, 0.035); }
.table-scroll.scrolled tr:hover th.model { background: rgba(232, 239, 248, 0.98); }
.mini-track, .track { position: relative; height: 2px; background: #dfe5ec; }
.mini-track { width: 88px; }
.track { margin-top: 22px; max-width: 520px; }
.mini-track i, .track i { position: absolute; top: 0; bottom: 0; background: var(--blue); }
.ticks {
  display: flex;
  justify-content: space-between;
  max-width: 520px;
  margin-top: 8px;
  color: var(--faint);
  font-size: 11px;
}
.line { margin: 8px 0 0; color: var(--muted); }
.empty { color: var(--muted); padding: 24px 0 48px; }

.detail {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 40px;
  align-items: start;
  padding-top: 28px;
}
.spec-list { margin: 0; }
.spec-list div {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.spec-list dt { color: var(--muted); }
.spec-list dd { margin: 0; }
.spec-list .unit { color: var(--faint); font-weight: 400; }
.rail {
  background: linear-gradient(165deg, rgba(0, 58, 141, 0.07), rgba(0, 151, 167, 0.05) 70%, rgba(255, 255, 255, 0.4));
  padding: 22px 20px 18px;
}
.rail h2 { margin-top: 0; }
.rail .wx-title { margin-top: 28px; }
.file { margin: 0 0 14px; font-size: 13px; word-break: break-all; }
.file a { text-decoration: underline; text-underline-offset: 2px; }
.btn { display: inline-block; background: var(--blue); color: #fff; padding: 10px 16px; }
.btn:hover { background: #002e70; }
.consult {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 14px;
  align-items: center;
  margin-top: 8px;
  background: #fff;
  padding: 12px;
}
.consult + .consult { margin-top: 10px; }
.consult img,
.qr img,
.foot-qr img { border-radius: 8px; cursor: zoom-in; position: relative; transition: transform .16s ease; }
@media (hover: hover) and (pointer: fine) {
  .consult img:hover,
  .qr img:hover,
  .foot-qr img:hover {
    transform: scale(2.2);
    z-index: 5;
    box-shadow: 0 14px 36px rgba(16, 32, 56, .16);
  }
}
.qr-lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(244, 247, 251, .88);
  backdrop-filter: blur(8px);
}
.qr-lightbox[hidden] { display: none; }
.qr-lightbox img {
  width: min(420px, 86vw);
  height: min(420px, 86vw);
  max-width: none;
  object-fit: contain;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 18px 48px rgba(16, 32, 56, .18);
}
.consult b { display: block; color: var(--ink); font-size: 15px; }
.consult p { margin: 6px 0 0; color: var(--muted); font-size: 13px; line-height: 1.45; }
.qr-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.qr { background: #fff; padding: 10px 8px 12px; text-align: center; }
.qr img { width: 112px; height: 112px; margin: 0 auto; object-fit: contain; }
.qr b { display: block; margin-top: 8px; font-size: 14px; }
.qr span, .note { display: block; color: var(--muted); font-size: 12px; line-height: 1.4; }
.note { margin: 12px 0 0; }
.related-row { display: flex; flex-wrap: wrap; gap: 8px 18px; padding-bottom: 48px; }
.related-row a { padding: 8px 0; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr auto; gap: 28px 48px; align-items: start; }
.contact-line b { display: block; color: var(--muted); font-size: 13px; font-weight: 500; }
.contact-line a { display: inline-block; margin-top: 8px; color: var(--ink); font-size: 22px; }
.contact-line a:hover { color: var(--blue); }
.contact-line span { display: block; margin-top: 6px; color: var(--muted); font-size: 14px; }
.use b { display: block; font-size: 18px; font-weight: 500; margin-bottom: 8px; }
.use p { margin: 0; color: var(--muted); line-height: 1.7; }
.office { padding: 22px 0; border-top: 1px solid var(--line); }
.office .city { font-size: 20px; font-weight: 500; }
.office .addr, .office .hours { margin: 6px 0 0; color: var(--muted); font-size: 14px; font-style: normal; }

.site-foot {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(0, 58, 141, 0.055) 70%);
  color: var(--muted);
  padding: 36px 0 28px;
}
.foot-grid { display: grid; grid-template-columns: 1.4fr 0.8fr auto; gap: 32px; align-items: start; }
.word { margin: 0; color: var(--ink); font-size: 20px; font-weight: 500; }
.sub { margin: 8px 0 0; font-size: 14px; }
.foot-more { margin: 12px 0 0; max-width: 38em; color: var(--muted); font-size: 13px; line-height: 1.7; }
.foot-nav { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.foot-nav a:hover { color: var(--blue); }
.foot-qr { display: flex; gap: 18px; align-items: flex-start; }
.foot-qr div { text-align: center; }
.foot-qr img { width: 128px; height: 128px; max-width: none; object-fit: contain; background: #fff; }
.foot-qr span { display: block; margin-top: 8px; font-size: 12px; }
.channels { display: flex; gap: 16px; flex-wrap: wrap; }
.channels .qr { width: 148px; }
.legal { margin-top: 28px; font-size: 12px; color: var(--faint); }

.search-hit { grid-template-columns: 1fr auto; }

@media (max-width: 800px) {
  .wrap { width: min(var(--max), calc(100% - 32px)); }
  .split, .about-grid, .contact-grid, .foot-grid, .detail { grid-template-columns: 1fr; }
  .foot-qr img { width: 128px; height: 128px; }
  .bar { gap: 8px; }
  .nav a, .lang a { padding: 8px 6px; }
  html[lang="en"] .nav a { letter-spacing: 0.08em; font-size: 12px; }
  .brand img { height: 36px; }
  h1 { font-size: 32px; }
}