:root {
  --red: #c8231b;
  --red-dark: #9e1b14;
  --yellow: #f2b33d;
  --ink: #1b2230;
  --text: #3b4352;
  --muted: #6b7383;
  --line: #e4e7ec;
  --bg: #ffffff;
  --bg-soft: #f5f6f8;
  --radius: 10px;
  --wrap: 1180px;
  --shadow: 0 6px 24px rgba(20, 28, 45, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--red); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--ink); line-height: 1.25; margin: 0 0 .6em; }
h1 { font-size: clamp(1.9rem, 4vw, 2.9rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 2.8vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { max-width: 720px; margin-bottom: 36px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow { display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--red); margin-bottom: 10px; }
.lead { font-size: 1.12rem; color: var(--text); }
.btn {
  display: inline-block; padding: 13px 24px; border-radius: 6px; font-weight: 600;
  background: var(--red); color: #fff; border: 2px solid var(--red); cursor: pointer; font-size: 1rem;
}
.btn:hover { background: var(--red-dark); border-color: var(--red-dark); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: #fff; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

/* Header */
.topbar { background: var(--ink); color: #c9ced8; font-size: .85rem; }
.topbar .wrap { display: flex; justify-content: space-between; gap: 16px; padding-top: 7px; padding-bottom: 7px; flex-wrap: wrap; }
.topbar a { color: #fff; }
header.site { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); backdrop-filter: blur(6px); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; font-size: 1.1rem; }
.brand:hover { text-decoration: none; }
.brand img { width: 52px; height: auto; }
.brand small { display: block; font-weight: 500; font-size: .72rem; color: var(--muted); letter-spacing: .04em; }
nav.main ul { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 26px; }
nav.main a { color: var(--ink); font-weight: 600; font-size: .96rem; }
nav.main a[aria-current="page"] { color: var(--red); }
nav.main .btn { color: #fff; padding: 10px 18px; }
.menu-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; }

/* Hero */
.hero { background: linear-gradient(100deg, #f4f5f7 0%, #f4f5f7 46%, #e9ebee 100%); overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; align-items: center; gap: 32px; min-height: 560px; }
.hero h1 span { color: var(--red); }
.hero-img { align-self: stretch; display: flex; align-items: center; }
.hero-img img { border-radius: var(--radius); box-shadow: var(--shadow); }
.trust { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); margin-top: -44px; position: relative; }
.trust div { padding: 22px 20px; border-right: 1px solid var(--line); }
.trust div:last-child { border-right: 0; }
.trust strong { display: block; color: var(--ink); font-size: 1.35rem; }
.trust span { color: var(--muted); font-size: .9rem; }

/* Grids & cards */
.grid { display: grid; gap: 24px; }
.grid.c2 { grid-template-columns: repeat(2, 1fr); }
.grid.c3 { grid-template-columns: repeat(3, 1fr); }
.grid.c4 { grid-template-columns: repeat(4, 1fr); }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: box-shadow .2s, transform .2s; }
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.card a { color: inherit; }
.card a:hover { text-decoration: none; }
.card .img { background: #fff; aspect-ratio: 1 / 1; display: flex; align-items: center; justify-content: center; }
.card .img img { width: 100%; height: 100%; object-fit: contain; }
.card .body { padding: 16px 18px 20px; border-top: 1px solid var(--line); }
.card .body h3 { margin-bottom: 4px; font-size: 1.02rem; }
.card .body p { color: var(--muted); font-size: .9rem; margin: 0; }
.tag { display: inline-block; font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--red); margin-bottom: 6px; }
.feature { padding: 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.feature .num { width: 38px; height: 38px; border-radius: 50%; background: var(--red); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; margin-bottom: 14px; }
.feature p { margin: 0; color: var(--muted); font-size: .95rem; }
.photo { border-radius: var(--radius); overflow: hidden; background: var(--bg-soft); }
.photo img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.photo figcaption { padding: 10px 14px; font-size: .88rem; color: var(--muted); background: #fff; border: 1px solid var(--line); border-top: 0; border-radius: 0 0 var(--radius) var(--radius); }
figure { margin: 0; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.checks { list-style: none; padding: 0; margin: 0 0 1em; }
.checks li { padding-left: 28px; position: relative; margin-bottom: 8px; }
.checks li::before { content: ""; position: absolute; left: 4px; top: 9px; width: 12px; height: 7px; border-left: 2.5px solid var(--red); border-bottom: 2.5px solid var(--red); transform: rotate(-45deg); }

/* Tables */
table.spec { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; font-size: .95rem; }
table.spec th, table.spec td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.spec th { width: 32%; background: var(--bg-soft); color: var(--ink); font-weight: 600; }
table.spec tr:last-child th, table.spec tr:last-child td { border-bottom: 0; }

/* Page header & breadcrumbs */
.page-head { background: var(--bg-soft); border-bottom: 1px solid var(--line); padding: 44px 0 36px; }
.page-head p { max-width: 760px; margin: 0; }
.crumbs { font-size: .85rem; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
.crumbs span { margin: 0 6px; }

/* Product detail */
.product { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.product .gallery { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 12px; position: sticky; top: 92px; }
.product .gallery img { width: 100%; }
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.filters button { border: 1px solid var(--line); background: #fff; padding: 8px 16px; border-radius: 30px; cursor: pointer; font-size: .92rem; color: var(--ink); }
.filters button.on { background: var(--ink); border-color: var(--ink); color: #fff; }

/* FAQ */
.faq details { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 0 20px; margin-bottom: 12px; }
.faq summary { cursor: pointer; padding: 18px 0; font-weight: 600; color: var(--ink); list-style: none; position: relative; padding-right: 28px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 14px; font-size: 1.4rem; color: var(--red); }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding-bottom: 6px; }

/* Article */
.article { max-width: 780px; }
.article h2 { margin-top: 1.6em; font-size: 1.5rem; }
.article ul { padding-left: 1.2em; }
.article li { margin-bottom: 6px; }

/* CTA */
.cta { background: var(--ink); color: #d6dae2; border-radius: 14px; padding: 48px; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
.cta h2 { color: #fff; margin-bottom: 6px; }
.cta p { margin: 0; }

/* Form */
form.inquiry { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
form.inquiry .full { grid-column: 1 / -1; }
form.inquiry label { display: block; font-weight: 600; font-size: .9rem; color: var(--ink); margin-bottom: 6px; }
form.inquiry input, form.inquiry select, form.inquiry textarea { width: 100%; padding: 11px 12px; border: 1px solid #cfd4dc; border-radius: 6px; font: inherit; color: var(--ink); background: #fff; }
form.inquiry textarea { min-height: 140px; resize: vertical; }
form.inquiry input:focus, form.inquiry select:focus, form.inquiry textarea:focus { outline: 2px solid var(--red); outline-offset: 1px; border-color: transparent; }
.form-note { font-size: .85rem; color: var(--muted); margin: 0; }
.contact-box { background: var(--bg-soft); border-radius: var(--radius); padding: 28px; }
.contact-box dt { font-weight: 700; color: var(--ink); margin-top: 14px; }
.contact-box dd { margin: 2px 0 0; }

/* Footer */
footer.site { background: #11161f; color: #a7aebb; padding: 56px 0 24px; margin-top: 0; font-size: .93rem; }
footer.site h4 { color: #fff; font-size: 1rem; margin-bottom: 14px; }
footer.site a { color: #d4d8e0; }
footer.site ul { list-style: none; padding: 0; margin: 0; }
footer.site li { margin-bottom: 8px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.3fr; gap: 32px; }
.foot-bottom { border-top: 1px solid #262d3a; margin-top: 40px; padding-top: 20px; font-size: .85rem; }
.float-mail { position: fixed; right: 18px; bottom: 18px; z-index: 60; background: var(--red); color: #fff; border-radius: 30px; padding: 12px 18px; font-weight: 600; box-shadow: 0 6px 18px rgba(200,35,27,.35); font-size: .92rem; }
.float-mail:hover { text-decoration: none; background: var(--red-dark); }

@media (max-width: 960px) {
  .hero .wrap, .split, .product { grid-template-columns: 1fr; }
  .hero .wrap { min-height: 0; padding-top: 40px; padding-bottom: 72px; }
  .hero-img img { width: 100%; max-height: 380px; object-fit: cover; object-position: 30% 50%; }
  .grid.c4 { grid-template-columns: repeat(2, 1fr); }
  .grid.c3 { grid-template-columns: repeat(2, 1fr); }
  .trust { grid-template-columns: repeat(2, 1fr); }
  .trust div:nth-child(2) { border-right: 0; }
  .trust div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .product .gallery { position: static; }
  .menu-toggle { display: block; }
  nav.main { position: absolute; top: 72px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); display: none; }
  nav.main.open { display: block; }
  nav.main ul { flex-direction: column; align-items: stretch; gap: 0; padding: 8px 20px 18px; }
  nav.main li a { display: block; padding: 12px 0; border-bottom: 1px solid var(--line); }
  nav.main li:last-child a { border: 0; margin-top: 12px; text-align: center; }
}
@media (max-width: 600px) {
  .section { padding: 52px 0; }
  .wrap { padding: 0 16px; }
  .grid.c2, .grid.c3 { grid-template-columns: 1fr; }
  .grid.c4 { grid-template-columns: 1fr 1fr; gap: 14px; }
  .card .body { padding: 12px 12px 14px; }
  .card .body p { display: none; }
  form.inquiry { grid-template-columns: 1fr; padding: 20px; }
  .foot-grid { grid-template-columns: 1fr; }
  .cta { padding: 32px 24px; }
  .topbar .hide-sm { display: none; }
  .brand small { display: none; }
  table.spec th { width: 40%; }
}