:root {
  --bg: #efece6;
  --paper: #f7f5f0;
  --ink: #1c1915;
  --navy: #141c24;
  --navy-2: #243240;
  --copper: #8d5e32;
  --copper-2: #c4a27a;
  --line: #ddd6cb;
  --muted: #5e584f;
  --card: #fffcf7;
  --danger: #8a2e24;
  --shadow: 0 18px 40px rgba(20, 28, 36, 0.08);
  --serif: "Palatino Linotype", Palatino, "Songti SC", "SimSun", serif;
  --sans: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --mono: Consolas, "Cascadia Mono", "Sarasa Mono SC", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: clip;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
.wrap { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.wrap-s { width: min(820px, calc(100% - 40px)); margin: 0 auto; }

.announcement {
  background: var(--navy);
  color: #efe7db;
  font-size: 13px;
  letter-spacing: 0.02em;
}
.announcement .wrap { display: flex; justify-content: space-between; gap: 16px; padding: 8px 0; }
.announcement span { min-width: 0; }
.announcement a { color: var(--copper-2); white-space: nowrap; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 245, 240, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .bar {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 74px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 42px; height: 42px; }
.brand .word { display: flex; flex-direction: column; line-height: 1.15; }
.brand strong { display: block; font-size: 16px; letter-spacing: 0.12em; font-weight: 650; color: var(--ink); }
.brand em { font-style: normal; color: var(--muted); font-size: 11px; letter-spacing: 0.14em; }
.nav { display: flex; align-items: center; gap: 18px; margin-left: auto; }
.nav a { text-decoration: none; font-size: 14px; color: var(--navy-2); }
.nav a:hover { color: var(--copper); }
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
label.nav-btn { display: none; margin: 0; }

.lang { display: flex; border: 1px solid var(--line); }
.lang a { padding: 6px 10px; text-decoration: none; font-size: 12px; letter-spacing: 0.08em; }
.lang a.on { background: var(--navy); color: #fff; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  background: var(--copper);
  color: #fff;
  text-decoration: none;
  border: 0;
  cursor: pointer;
  letter-spacing: 0.04em;
}
.btn.dark { background: var(--navy); }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn.light { background: #fff; color: var(--navy); }

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  min-height: 620px;
  background: var(--navy);
  color: #f4efe7;
}
.hero-copy { padding: 72px 6vw 56px; display: flex; flex-direction: column; justify-content: center; }
.kicker { letter-spacing: 0.18em; text-transform: uppercase; color: var(--copper-2); font-size: 12px; margin: 0 0 16px; }
.hero h1 { font-family: var(--serif); font-weight: 500; font-size: clamp(40px, 5vw, 68px); line-height: 1.05; margin: 0 0 18px; overflow-wrap: break-word; }
.hero p.lead { font-size: 18px; max-width: 46ch; color: #ddd4c8; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-figure { position: relative; min-height: 420px; }
.hero-figure img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; }
.hero-figure figcaption {
  position: absolute; left: 16px; bottom: 16px;
  background: rgba(20, 28, 36, 0.78); color: #fff; padding: 8px 12px; font-size: 12px;
}

.band-strip { display: grid; grid-template-columns: repeat(8, 1fr); background: #fff; border-bottom: 1px solid var(--line); }
.band-strip div { padding: 16px 8px; text-align: center; border-right: 1px solid var(--line); }
.band-strip strong { display: block; font-family: var(--mono); font-size: 14px; }
.band-strip span { color: var(--muted); font-size: 12px; }

section { padding: 72px 0; }
.sec-h { display: flex; justify-content: space-between; gap: 24px; align-items: end; margin-bottom: 28px; }
.sec-h h2 { font-family: var(--serif); font-size: 36px; font-weight: 500; margin: 0; line-height: 1.15; }
.sec-h p { margin: 0; color: var(--muted); max-width: 42ch; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
  min-width: 0;
}
.card h3 { margin: 8px 0; font-size: 22px; font-weight: 600; }
.card p { color: var(--muted); }
.card .idx { font-family: var(--mono); color: var(--copper); font-size: 12px; letter-spacing: 0.14em; }
.card img { width: 100%; height: 180px; object-fit: cover; margin: -22px -22px 16px; width: calc(100% + 44px); max-width: none; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.filters button, .search {
  border: 1px solid var(--line);
  background: #fff;
  min-height: 40px;
  padding: 0 12px;
}
.filters button.on { background: var(--navy); color: #fff; border-color: var(--navy); }
.search { min-width: min(280px, 100%); }

.catalog { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.pcard {
  background: var(--card);
  border: 1px solid var(--line);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  min-height: 240px;
}
.pcard .top { padding: 16px 16px 0; }
.pcard .model { font-family: var(--mono); font-size: 13px; color: var(--copper); }
.pcard h3 { margin: 6px 0; font-size: 18px; line-height: 1.35; overflow-wrap: anywhere; }
.pcard .freq { font-family: var(--mono); font-size: 15px; overflow-wrap: anywhere; }
.pcard.slim { min-height: 0; }
.pcard.slim .top { padding-bottom: 16px; }
.pcard dl { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 12px; margin: 12px 0 0; padding: 12px 16px 16px; border-top: 1px solid var(--line); }
.pcard dt { color: var(--muted); font-size: 12px; }
.pcard dd { margin: 0; font-family: var(--mono); font-size: 13px; }
.thumb {
  height: 140px;
  background: #fff center/contain no-repeat;
  border-bottom: 1px solid var(--line);
}

.layout { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 28px; align-items: start; }
.spec { width: 100%; border-collapse: collapse; background: #fff; }
.spec th, .spec td { border-bottom: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
.spec th { width: 34%; color: var(--muted); font-weight: 550; background: #f3efe8; }
.spec td { font-family: var(--mono); font-size: 14px; }
.note { color: var(--muted); font-size: 13px; }
.side .card + .card { margin-top: 16px; }
.drawing { background: #fff; border: 1px solid var(--line); padding: 12px; }
.drawing img { width: 100%; height: auto; }

.page-hero { padding: 48px 0 10px; }
.page-hero h1 { font-family: var(--serif); font-size: clamp(34px, 4vw, 52px); font-weight: 500; margin: 0 0 8px; line-height: 1.1; overflow-wrap: break-word; }
.crumbs { color: var(--muted); font-size: 13px; }
.crumbs a { color: var(--copper); }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.stats div { background: var(--card); padding: 22px; }
.stats strong { display: block; font-family: var(--serif); font-size: 28px; font-weight: 500; }
.stats span { color: var(--muted); font-size: 13px; }

.photo-row { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; }
.photo-row img { width: 100%; height: 360px; object-fit: cover; }
.caption { font-size: 13px; color: var(--muted); margin-top: 8px; }

form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
label { display: block; font-size: 13px; margin: 12px 0 6px; }
input, select, textarea {
  width: 100%;
  background: #fff;
  border: 1px solid var(--line);
  padding: 10px 12px;
  min-height: 44px;
}
textarea { min-height: 120px; resize: vertical; }
.hp { position: absolute; left: -9999px; }
.form-ok { display: none; background: #e7f0ea; border: 1px solid #b7d2c2; padding: 14px; }
.error { color: var(--danger); font-size: 13px; }

.site-footer { background: var(--navy); color: #e6dfd4; padding: 48px 0 28px; }
.site-footer a { color: var(--copper-2); }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 24px; }
.site-footer h3 { margin: 0 0 10px; font-size: 14px; letter-spacing: 0.12em; text-transform: uppercase; color: #fff; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 6px 0; }
.legal { margin-top: 28px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.12); color: #b7aea2; font-size: 12px; }

.prose h2 { font-family: var(--serif); font-weight: 500; font-size: 28px; }
.prose li { margin: 6px 0; }

.hero > *,
.photo-row > *,
.grid-3 > *,
.grid-2 > *,
.catalog > *,
.layout > *,
.stats > *,
.foot-grid > *,
.band-strip > div { min-width: 0; }

@media (max-width: 980px) {
  .hero, .layout, .grid-3, .catalog, .photo-row, .foot-grid, .stats, .grid-2, .form .row { grid-template-columns: 1fr; }
  .band-strip { grid-template-columns: repeat(4, 1fr); }
  .hero-copy { padding: 40px 22px 32px; }
  .hero h1 { font-size: clamp(32px, 9vw, 48px); }
  .hero-figure { min-height: 240px; }
  .photo-row img { height: 220px; }
  .sec-h { flex-direction: column; align-items: flex-start; }
  label.nav-btn { display: inline-flex; margin: 0 0 0 auto; }
  .nav {
    display: none;
    position: absolute;
    top: 74px; left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 20px 18px;
    gap: 10px;
  }
  .nav-toggle:checked ~ .nav { display: flex; }
  .announcement .wrap { flex-direction: column; }
}
@media (max-width: 640px) {
  .band-strip { grid-template-columns: repeat(2, 1fr); }
  .wrap { width: min(1180px, calc(100% - 28px)); }
  section { padding: 48px 0; }
}