:root {
  --red: #cc171f;
  --red-dark: #9f1017;
  --ink: #171717;
  --muted: #696969;
  --paper: #f3f1ed;
  --white: #ffffff;
  --line: #d9d6d0;
  --shadow: 0 18px 50px rgba(28, 24, 20, 0.08);
  --container: 1220px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }

.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 100;
  padding: 10px 14px; background: var(--ink); color: var(--white);
  transform: translateY(-160%); transition: transform 0.2s;
}
.skip-link:focus { transform: translateY(0); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.site-header {
  position: sticky; top: 0; z-index: 30;
  background: rgba(243, 241, 237, 0.92);
  border-bottom: 1px solid rgba(23, 23, 23, 0.12);
  backdrop-filter: blur(16px);
}
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { width: 166px; display: block; }
.brand img { width: 100%; height: auto; }
.main-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 650; }
.main-nav a { text-decoration: none; }
.main-nav a:hover { color: var(--red); }
.main-nav .nav-contact { padding-left: 30px; border-left: 1px solid var(--line); }

.hero { position: relative; overflow: hidden; padding: 92px 0 86px; background: var(--paper); }
.hero::before {
  content: "AC"; position: absolute; right: -0.05em; bottom: -0.35em;
  color: rgba(204, 23, 31, 0.055); font-weight: 900; font-size: clamp(260px, 42vw, 680px);
  line-height: 1; letter-spacing: -0.11em; pointer-events: none;
}
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(320px, 0.85fr); gap: 90px; align-items: end; }
.eyebrow { margin: 0 0 20px; color: var(--red); font-size: 12px; font-weight: 800; letter-spacing: 0.18em; text-transform: uppercase; }
.hero h1 { margin: 0; max-width: 860px; font-size: clamp(48px, 6.2vw, 90px); line-height: 0.98; letter-spacing: -0.055em; font-weight: 800; }
.hero h1 span { color: var(--red); }
.hero-lead { max-width: 690px; margin: 30px 0 36px; color: #454545; font-size: clamp(18px, 1.65vw, 22px); line-height: 1.55; }
.primary-action {
  display: inline-flex; align-items: center; gap: 28px; min-height: 54px; padding: 0 22px;
  color: var(--white); background: var(--ink); text-decoration: none; font-size: 14px; font-weight: 750;
  transition: background 0.2s, transform 0.2s;
}
.primary-action:hover { background: var(--red); transform: translateY(-2px); }
.primary-action span { font-size: 20px; }
.hero-panel { padding: 32px; color: var(--white); background: var(--ink); box-shadow: var(--shadow); }
.hero-stat { display: flex; align-items: flex-end; gap: 18px; }
.hero-stat strong { color: var(--red); font-size: 82px; line-height: 0.84; letter-spacing: -0.06em; }
.hero-stat span { max-width: 155px; padding-bottom: 4px; color: #c7c7c7; font-size: 14px; }
.hero-rule { height: 1px; margin: 28px 0; background: #404040; }
.hero-points { display: grid; gap: 18px; margin: 0; padding: 0; list-style: none; font-size: 14px; }
.hero-points li { display: grid; grid-template-columns: 32px 1fr; gap: 12px; align-items: baseline; }
.hero-points li span { color: var(--red); font-size: 11px; font-weight: 850; letter-spacing: 0.1em; }

.catalog-section { padding: 92px 0 108px; background: var(--white); }
.section-heading { display: grid; grid-template-columns: 1fr minmax(320px, 0.66fr); gap: 90px; align-items: end; }
.section-heading h2, .guide-section h2, .consult-section h2 { margin: 0; font-size: clamp(38px, 4.4vw, 62px); line-height: 1.02; letter-spacing: -0.045em; }
.section-intro { margin: 0; color: var(--muted); font-size: 17px; }
.catalog-controls { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin-top: 54px; padding: 18px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.search-box { position: relative; width: min(100%, 450px); display: block; }
.search-box input { width: 100%; min-height: 46px; padding: 0 16px 0 46px; border: 1px solid var(--line); border-radius: 0; color: var(--ink); background: #faf9f7; outline: none; }
.search-box input:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(204, 23, 31, 0.1); }
.search-box input::placeholder { color: #8d8a85; }
.search-mark { position: absolute; left: 17px; top: 14px; width: 15px; height: 15px; border: 1.8px solid var(--ink); border-radius: 50%; }
.search-mark::after { content: ""; position: absolute; right: -5px; bottom: -3px; width: 7px; height: 1.8px; background: var(--ink); transform: rotate(45deg); transform-origin: left center; }
.filters { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.filter-button { min-height: 38px; padding: 0 14px; border: 1px solid var(--line); color: #4a4a4a; background: transparent; cursor: pointer; }
.filter-button:hover, .filter-button:focus-visible { border-color: var(--ink); color: var(--ink); }
.filter-button.is-active { border-color: var(--ink); color: var(--white); background: var(--ink); }
.catalog-meta { display: flex; justify-content: space-between; gap: 20px; margin: 26px 0 20px; color: #85817c; font-size: 12px; font-weight: 750; letter-spacing: 0.11em; text-transform: uppercase; }
.catalog-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.system-card { min-width: 0; display: grid; grid-template-columns: minmax(180px, 0.72fr) minmax(0, 1.28fr); min-height: 418px; border: 1px solid var(--line); background: var(--white); transition: transform 0.22s, box-shadow 0.22s, border-color 0.22s; }
.system-card:hover { z-index: 1; transform: translateY(-4px); border-color: #bbb7b0; box-shadow: var(--shadow); }
.system-card[hidden] { display: none; }
.cover-wrap { position: relative; overflow: hidden; min-height: 100%; background: #dedbd5; }
.cover-wrap::after { content: ""; position: absolute; inset: 0; box-shadow: inset -16px 0 30px rgba(0,0,0,0.06); pointer-events: none; }
.cover-wrap img { width: 100%; height: 100%; object-fit: cover; object-position: center top; transition: transform 0.45s; }
.system-card:hover .cover-wrap img { transform: scale(1.025); }
.system-code { position: absolute; top: 15px; left: 15px; z-index: 2; padding: 5px 8px; color: var(--white); background: rgba(23,23,23,0.86); font-size: 10px; font-weight: 850; letter-spacing: 0.12em; }
.card-body { min-width: 0; display: flex; flex-direction: column; padding: 28px; }
.card-title-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.card-kind { margin: 0 0 7px; color: var(--red); font-size: 10px; font-weight: 850; letter-spacing: 0.12em; text-transform: uppercase; }
.card-title-row h3 { margin: 0; font-size: 27px; line-height: 1.05; letter-spacing: -0.035em; }
.thickness { flex: none; padding: 5px 8px; border: 1px solid var(--line); color: #5e5a55; font-size: 11px; font-weight: 750; white-space: nowrap; }
.card-summary { margin: 22px 0 20px; color: #54514d; font-size: 14px; line-height: 1.62; }
.use-tags { display: flex; flex-wrap: wrap; gap: 7px; margin: 0 0 24px; padding: 0; list-style: none; }
.use-tags li { padding: 5px 8px; color: #5e5a55; background: #f1efeb; font-size: 10px; font-weight: 700; }
.card-actions { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: auto; padding-top: 20px; border-top: 1px solid var(--line); }
.card-actions a { font-size: 12px; font-weight: 800; text-decoration: none; }
.view-link { color: #55514c; }
.view-link:hover { color: var(--red); }
.download-link { display: inline-flex; align-items: center; gap: 8px; color: var(--red); }
.download-link span { color: #918d87; font-size: 10px; font-weight: 650; }
.download-link b { font-size: 17px; transition: transform 0.2s; }
.download-link:hover b { transform: translateY(3px); }
.empty-state { padding: 80px 20px; border: 1px dashed var(--line); text-align: center; }
.empty-state > span { color: var(--red); font-size: 54px; }
.empty-state h3 { margin: 8px 0; font-size: 26px; }
.empty-state p { margin: 0 0 22px; color: var(--muted); }
.empty-state button { min-height: 42px; padding: 0 18px; border: 0; color: var(--white); background: var(--ink); cursor: pointer; }

.guide-section { padding: 100px 0; color: var(--white); background: var(--ink); }
.guide-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 100px; }
.eyebrow-light { color: #f24b52; }
.guide-steps { margin: 0; padding: 0; list-style: none; }
.guide-steps li { display: grid; grid-template-columns: 54px 1fr; gap: 24px; padding: 28px 0; border-top: 1px solid #3e3e3e; }
.guide-steps li:last-child { border-bottom: 1px solid #3e3e3e; }
.guide-steps > li > span { color: var(--red); font-size: 12px; font-weight: 850; letter-spacing: 0.12em; }
.guide-steps h3 { margin: 0 0 8px; font-size: 20px; }
.guide-steps p { margin: 0; color: #b9b9b9; font-size: 15px; }

.consult-section { padding: 82px 0; background: #e9e6e0; }
.consult-inner { display: flex; align-items: flex-end; justify-content: space-between; gap: 64px; }
.consult-inner h2 { max-width: 850px; font-size: clamp(34px, 4vw, 56px); }
.consult-inner > a { flex: none; display: inline-flex; align-items: center; gap: 20px; min-height: 52px; padding: 0 20px; color: var(--white); background: var(--red); font-size: 13px; font-weight: 800; text-decoration: none; }
.consult-inner > a:hover { background: var(--red-dark); }
.site-footer { padding: 30px 0; color: #a6a6a6; background: #0d0d0d; }
.footer-inner { display: grid; grid-template-columns: 130px 1fr auto; gap: 34px; align-items: center; font-size: 12px; }
.footer-inner img { width: 130px; height: auto; filter: grayscale(1) brightness(2.5); opacity: 0.84; }
.footer-inner p { margin: 0; }

@media (max-width: 1050px) {
  .hero-grid { gap: 46px; }
  .catalog-grid { grid-template-columns: 1fr; }
  .system-card { grid-template-columns: 235px 1fr; }
  .guide-grid { gap: 60px; }
}

@media (max-width: 780px) {
  .container { width: min(calc(100% - 32px), var(--container)); }
  .header-inner { min-height: 66px; }
  .brand { width: 134px; }
  .main-nav a:not(.nav-contact) { display: none; }
  .main-nav .nav-contact { padding-left: 0; border-left: 0; font-size: 12px; }
  .hero { padding: 66px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: 46px; }
  .hero h1 { font-size: clamp(44px, 13vw, 72px); }
  .hero-panel { max-width: 480px; }
  .catalog-section { padding: 68px 0 78px; }
  .section-heading { grid-template-columns: 1fr; gap: 20px; }
  .catalog-controls { align-items: stretch; flex-direction: column; }
  .search-box { width: 100%; }
  .filters { justify-content: flex-start; flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; }
  .filter-button { flex: none; }
  .system-card { grid-template-columns: 190px 1fr; }
  .guide-grid { grid-template-columns: 1fr; gap: 48px; }
  .consult-inner { align-items: flex-start; flex-direction: column; gap: 30px; }
}

@media (max-width: 590px) {
  .container { width: min(calc(100% - 24px), var(--container)); }
  .hero { padding-top: 54px; }
  .hero-lead { margin-top: 24px; font-size: 17px; }
  .hero-panel { padding: 25px; }
  .hero-stat strong { font-size: 70px; }
  .catalog-meta { font-size: 10px; }
  .system-card { display: block; }
  .cover-wrap { aspect-ratio: 16 / 10; min-height: 0; }
  .cover-wrap img { object-position: center 4%; }
  .card-body { padding: 22px; }
  .card-title-row h3 { font-size: 25px; }
  .card-actions { align-items: flex-start; flex-direction: column; }
  .download-link { width: 100%; justify-content: space-between; padding-top: 6px; }
  .download-link span { margin-left: auto; }
  .guide-section { padding: 72px 0; }
  .guide-steps li { grid-template-columns: 38px 1fr; gap: 14px; }
  .consult-section { padding: 62px 0; }
  .footer-inner { grid-template-columns: 110px 1fr; gap: 16px 24px; }
  .footer-inner p:last-child { grid-column: 1 / -1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

.catalog-breadcrumbs{padding-top:24px;padding-bottom:0;font-size:14px;color:#555}.catalog-breadcrumbs a{color:inherit;text-underline-offset:3px}