:root {
    --white: #ffffff;
    --paper: #f4f6f8;
    --ink: #171a1f;
    --muted: #5e6772;
    --line: #d7dee6;
    --blue: #0c3c8c;
    --blue-deep: #071833;
    --red: #d0121a;
    --shadow: 0 1px 0 rgba(7, 24, 51, 0.04);
    --wrap: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--white);
    font-family: Helvetica, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
}
img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3 { font-weight: 700; letter-spacing: -0.03em; line-height: 1.05; margin: 0; }
p { margin: 0; }

.sr, .skip {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
}
.skip:focus { position: fixed; top: 8px; left: 8px; width: auto; height: auto; clip: auto; background: var(--white); padding: 8px 12px; z-index: 20; }

.wrap { width: min(var(--wrap), calc(100% - 40px)); margin: 0 auto; }
.kicker {
    display: flex;
    gap: 10px;
    align-items: center;
    margin: 0 0 14px;
    color: var(--blue);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}
.kicker span { color: var(--red); }
.lede { max-width: 46rem; color: var(--muted); font-size: 18px; }

.topbar { background: var(--blue-deep); color: #d5deea; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
.topbar a { color: #fff; }
.topbar-inner, .mast-inner, .nav-row, .footer-base { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.topbar-inner { min-height: 36px; }
.topbar-meta { display: flex; gap: 18px; }
.dealer-mark { display: inline-flex; align-items: center; gap: 8px; color: #fff; }
.dealer-mark i { width: 8px; height: 8px; background: var(--red); display: inline-block; }

.mast { border-bottom: 1px solid var(--line); background: var(--white); }
.mast-inner { min-height: 84px; }
.logo { display: inline-flex; align-items: center; color: var(--ink); }
.logo img { height: 52px; width: auto; }
.footer-logo img { height: 48px; width: auto; background: transparent; padding: 0; }

.search { position: relative; flex: 1; display: flex; border: 1px solid var(--line); background: var(--paper); }
.search input { flex: 1; border: 0; background: transparent; padding: 12px 14px; outline: none; min-width: 0; }
.search button { border: 0; background: var(--blue); color: #fff; padding: 0 18px; letter-spacing: 0.08em; text-transform: uppercase; font-size: 12px; font-weight: 700; cursor: pointer; }
.search-panel {
    position: absolute;
    top: calc(100% + 6px);
    left: -1px;
    right: -1px;
    z-index: 40;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 16px 40px rgba(7, 24, 51, 0.12);
    max-height: min(70vh, 520px);
    overflow: auto;
}
.search-hit {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 10px;
    color: var(--ink);
    border-bottom: 1px solid var(--paper);
}
.search-hit img, .search-thumb {
    width: 48px;
    height: 48px;
    object-fit: cover;
    flex: none;
    background: var(--paper);
    border: 1px solid var(--line);
}
.search-hit span { min-width: 0; }
.search-hit small { display: block; color: var(--red); font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.search-hit strong { display: block; font-size: 13px; letter-spacing: -0.02em; }
.search-hit em { display: block; font-style: normal; color: var(--muted); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-hit:hover, .search-hit.is-active, .search-all:hover, .search-all.is-active { background: var(--paper); }
.search-all {
    display: block;
    padding: 12px;
    text-align: center;
    color: var(--blue);
    background: #fff;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.search-empty { margin: 0; padding: 14px; color: var(--muted); font-size: 14px; }
.mast-contact, .btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 16px; border: 1px solid transparent; font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.mast-contact { color: var(--blue); border-color: var(--line); }
.nav-toggle { display: none; border: 1px solid var(--line); background: #fff; min-height: 44px; padding: 0 12px; letter-spacing: 0.08em; text-transform: uppercase; font-size: 12px; font-weight: 700; }

.main-nav { border-bottom: 1px solid var(--line); background: #fff; position: sticky; top: 0; z-index: 5; }
.nav-row { min-height: 52px; justify-content: flex-start; gap: 0; }
.nav-row > a, .nav-drop > a {
    color: var(--ink);
    padding: 16px 22px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border-bottom: 2px solid transparent;
}
.nav-row > a + a, .nav-drop { border-left: 1px solid var(--line); }
.nav-row > a.is-active, .nav-drop > a.is-active { color: var(--blue); border-bottom-color: var(--blue); }
.nav-drop { position: static; }
.nav-drop > a { display: inline-flex; }
.mega {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding: 28px 0 34px;
}
.nav-drop:hover .mega, .nav-drop:focus-within .mega { display: block; }
.mega-grid { width: min(var(--wrap), calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: repeat(5, 1fr); gap: 22px 28px; }
.mega-grid a { display: block; color: var(--muted); font-size: 14px; padding: 3px 0; }
.mega-title { color: var(--ink) !important; font-weight: 700; margin-bottom: 6px; }

.hero { border-bottom: 1px solid var(--line); background:
    linear-gradient(90deg, transparent 0, transparent calc(100% - 1px), var(--line) calc(100% - 1px)),
    linear-gradient(var(--paper), var(--white) 70%); }
.hero-grid { display: grid; grid-template-columns: 1.4fr 0.8fr; gap: 48px; padding: 72px 0; align-items: end; }
.hero h1 { font-size: clamp(32px, 4.8vw, 56px); max-width: 16em; margin-bottom: 18px; }
.hero-actions { display: flex; gap: 12px; margin-top: 28px; }
.btn-red { background: var(--red); color: #fff; }
.btn-line { border-color: var(--ink); color: var(--ink); background: #fff; }
.spec-card { border: 1px solid var(--line); background: #fff; padding: 22px; }
.spec-card dl { display: grid; grid-template-columns: 1fr 1fr; margin: 0; }
.spec-card div { padding: 14px 0; border-top: 1px solid var(--line); }
.spec-card dt { color: var(--muted); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; }
.spec-card dd { margin: 4px 0 0; font-size: 28px; font-weight: 700; letter-spacing: -0.04em; }
.spec-card > p { margin-top: 8px; color: var(--muted); font-size: 14px; }

.section { padding: 64px 0; }
.section-paper { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 8px 20px;
    margin-bottom: 28px;
}
.section-head .kicker { width: 100%; margin-bottom: 0; }
.section-head h2 { flex: 1; }
.section-head h2, .page-head h1 { font-size: clamp(32px, 4vw, 48px); }
.section-head a { font-size: 13px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }

.category-grid, .product-grid, .steps { display: grid; gap: 12px; }
.category-grid { grid-template-columns: repeat(5, 1fr); }
.category-tile, .product-card, .steps article {
    background: #fff;
    border: 1px solid var(--line);
    min-height: 150px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: var(--ink);
}
.category-tile .index, .product-meta { color: var(--red); font-size: 12px; font-weight: 700; letter-spacing: 0.14em; }
.category-tile strong { font-size: 18px; letter-spacing: -0.03em; }
.category-tile em, .product-card em { font-style: normal; color: var(--muted); font-size: 14px; }
.category-tile:hover, .product-card:hover { border-color: var(--blue); }

.product-grid { grid-template-columns: repeat(4, 1fr); }
.product-visual {
    aspect-ratio: 1;
    height: auto;
    overflow: hidden;
    background: #fff;
    display: grid;
    place-items: center;
    margin: -16px -16px 14px;
    border-bottom: 1px solid var(--line);
}
.product-visual img { width: 100%; height: 100%; max-height: none; object-fit: cover; }
.product-card strong { letter-spacing: -0.02em; }
.product-fallback { color: var(--muted); font-size: 13px; letter-spacing: 0.08em; }

.steps { grid-template-columns: repeat(3, 1fr); }
.steps h2 { font-size: 28px; margin-bottom: 10px; }
.steps p:last-child { color: var(--muted); }

.page-head { padding: 48px 0 10px; border-bottom: 1px solid var(--line); }
.page-head.slim { padding-bottom: 18px; }
.page-head p:last-child { color: var(--muted); margin-top: 10px; }
.page-head .kicker a { color: var(--blue); }

.catalog-grid { display: grid; grid-template-columns: 240px 1fr; gap: 36px; }
.filters a, .filters h2 { display: block; }
.filters h2 { margin: 22px 0 8px; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.filters a { color: var(--ink); padding: 6px 0; border-bottom: 1px solid var(--paper); }
.filters a.sub { padding-left: 12px; color: var(--muted); font-size: 14px; }
.filters a.is-current { color: var(--red); }
.filters select, .form input, .form textarea {
    width: 100%;
    margin-top: 8px;
    border: 1px solid var(--line);
    background: #fff;
    padding: 10px 12px;
}
.check { display: flex; gap: 8px; align-items: center; margin: 12px 0; font-size: 14px; }
.search-note, .empty { margin-bottom: 16px; color: var(--muted); }
.pages { display: flex; gap: 16px; align-items: center; margin-top: 28px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; font-size: 13px; }
.pages .is-disabled { color: var(--line); }

.detail { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.detail-visual { min-height: 420px; background: var(--paper); border: 1px solid var(--line); display: grid; place-items: center; padding: 24px; }
.detail-visual img { max-height: 380px; object-fit: contain; }
.detail h1 { font-size: clamp(28px, 4vw, 42px); margin-bottom: 12px; }
.sku { letter-spacing: 0.08em; text-transform: uppercase; font-size: 13px; color: var(--blue); font-weight: 700; }
.pill { display: inline-block; margin-top: 12px; border: 1px solid var(--blue); color: var(--blue); padding: 4px 8px; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
.detail .lede { margin: 18px 0; }

.product-description { max-width: 880px; }
.product-description h2,
.product-description h3,
.product-description h4 { font-size: 28px; margin: 28px 0 12px; }
.product-description p { color: var(--muted); margin: 0 0 14px; }
.product-description img { width: 100%; height: auto; margin: 18px 0; border: 1px solid var(--line); background: var(--white); }
.product-description ul,
.product-description ol { margin: 0 0 14px; padding-left: 18px; color: var(--muted); }
.spec-table { border-top: 1px solid var(--line); }
.spec-table div { display: grid; grid-template-columns: 240px 1fr; gap: 20px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.spec-table dt { color: var(--muted); }
.spec-table dd { margin: 0; }

.prose { max-width: 760px; }
.prose p + p { margin-top: 14px; }
.prose-steps { margin-top: 28px; max-width: none; }
.contact-grid { display: grid; grid-template-columns: 0.7fr 1.1fr; gap: 48px; }
.form { display: grid; gap: 12px; }
.form label { display: grid; font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.form small { color: var(--red); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-status { background: #eef4ff; color: var(--blue); padding: 12px; border: 1px solid #c9d7f2; }

.site-footer { background: var(--blue-deep); color: #d5deea; padding-top: 48px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 0.6fr; gap: 32px; padding-bottom: 32px; }
.footer-grid a, .footer-logo { color: #fff; }
.footer-grid h2 { color: #fff; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 12px; }
.footer-grid a { display: block; padding: 3px 0; color: #d5deea; }
.footer-logo strong { color: #fff; }
.footer-base { border-top: 1px solid rgba(255,255,255,0.12); min-height: 56px; font-size: 13px; }

@media (max-width: 980px) {
    .hero-grid, .detail, .catalog-grid, .contact-grid, .footer-grid { grid-template-columns: 1fr; }
    .category-grid, .product-grid { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: 1fr; }
    .mega-grid { grid-template-columns: repeat(2, 1fr); }
    .mast-inner { flex-wrap: wrap; padding: 12px 0; }
    .search { flex: 1 1 100%; }
    .nav-toggle { display: inline-flex; }
    .main-nav { display: none; position: static; }
    .main-nav.is-open { display: block; }
    .nav-row { flex-direction: column; align-items: stretch; }
    .nav-row > a, .nav-drop > a { border-left: 0; border-bottom: 1px solid var(--line); }
    .mega { position: static; display: block; box-shadow: none; padding: 0 0 12px; }
    .nav-drop:hover .mega { display: block; }
    .spec-table div { grid-template-columns: 1fr; gap: 4px; }
}
@media (max-width: 640px) {
    .category-grid, .product-grid, .mega-grid { grid-template-columns: 1fr; }
    .topbar-meta span { display: none; }
    .hero { padding: 0; }
    .hero-grid { padding: 36px 0; }
}