:root {
  --ink: #18212b;
  --muted: #5e6a73;
  --line: #dbe2e6;
  --paper: #ffffff;
  --soft: #f4f7f8;
  --brand: #24558a;
  --teal: #177f78;
  --accent: #c85f45;
  --shadow: 0 14px 38px rgba(24, 33, 43, 0.1);
  --shell: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  letter-spacing: 0;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.shell { width: min(calc(100% - 40px), var(--shell)); margin-inline: auto; }
.section { padding-block: 88px; }
.eyebrow { margin: 0 0 10px; color: var(--teal); font-size: 13px; font-weight: 800; text-transform: uppercase; }
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border: 1px solid transparent;
  border-radius: 5px;
  cursor: pointer;
  font-weight: 700;
}
.button--primary { color: #fff; background: var(--brand); }
.button--primary:hover { background: #163e69; }
.button--light { color: var(--ink); background: rgba(255, 255, 255, 0.9); border-color: rgba(255,255,255,.9); }
.text-link { color: var(--brand); font-weight: 750; }

.site-header { position: sticky; top: 0; z-index: 30; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
.site-header__inner { display: grid; grid-template-columns: auto 1fr auto; align-items: center; min-height: 74px; gap: 28px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { width: 48px; height: 48px; object-fit: contain; }
.brand span { display: grid; line-height: 1.15; }
.brand strong { font-size: 17px; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 9px; }
.primary-nav { justify-self: end; }
.primary-nav ul { display: flex; align-items: center; gap: 28px; margin: 0; padding: 0; list-style: none; }
.primary-nav a { color: #37434c; font-size: 15px; font-weight: 650; }
.primary-nav a:hover, .primary-nav .current-menu-item > a { color: var(--brand); }
.header-contact { padding: 9px 15px; border-radius: 4px; color: #fff; background: var(--teal); font-size: 14px; font-weight: 700; }
.nav-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: 4px; font-size: 23px; }

.hero { position: relative; min-height: min(760px, calc(100vh - 74px)); background-position: center; background-size: cover; display: grid; align-items: center; }
.hero__shade { position: absolute; inset: 0; background: linear-gradient(90deg, #fff 0%, #fff 64%, rgba(255,255,255,.98) 73%, rgba(255,255,255,.45) 88%, rgba(255,255,255,.12) 100%); }
.hero__content { position: relative; padding-block: 92px 130px; }
.hero h1 { max-width: 760px; margin: 0; font-size: clamp(42px, 6vw, 76px); line-height: 1.12; }
.hero__lead { margin: 18px 0 0; color: var(--brand); font-size: clamp(24px, 3vw, 38px); font-weight: 750; }
.hero__copy { max-width: 620px; margin: 22px 0 0; color: #46535c; font-size: 18px; }
.hero__actions { display: flex; gap: 12px; margin-top: 34px; }

.trust-strip { position: relative; z-index: 2; margin-top: -58px; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); background: #fff; border: 1px solid var(--line); border-radius: 6px; box-shadow: var(--shadow); }
.trust-grid div { display: grid; gap: 2px; padding: 28px 30px; border-right: 1px solid var(--line); }
.trust-grid div:last-child { border-right: 0; }
.trust-grid strong { color: var(--brand); font-size: 24px; }
.trust-grid span { color: var(--muted); font-size: 13px; }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.section-heading h2, .about-copy h2, .contact-band h2 { margin: 0; font-size: clamp(30px, 4vw, 44px); line-height: 1.25; }
.section-heading > a { color: var(--brand); font-weight: 700; }
.product-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.product-card { overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.product-card__media { display: block; aspect-ratio: 4 / 3; overflow: hidden; background: var(--soft); }
.product-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.product-card:hover .product-card__media img { transform: scale(1.035); }
.product-card__body { padding: 22px; }
.product-card__brand { margin: 0 0 6px; color: var(--teal); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.product-card h2, .product-card h3 { margin: 0; font-size: 20px; line-height: 1.4; }
.product-card__body > p:last-child { margin-bottom: 0; color: var(--muted); font-size: 14px; }

.about-band { background: var(--soft); }
.about-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 64px; align-items: center; }
.about-media { aspect-ratio: 4 / 3; overflow: hidden; border-radius: 6px; box-shadow: var(--shadow); }
.about-media img { width: 100%; height: 100%; object-fit: cover; }
.about-copy > p { color: var(--muted); }
.check-list { display: grid; gap: 10px; margin: 26px 0; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 25px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 900; }

.news-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }
.news-card { min-height: 250px; padding: 26px; border-top: 3px solid var(--teal); background: var(--soft); border-radius: 0 0 6px 6px; }
.news-card__date { margin: 0 0 14px; color: var(--muted); font-size: 13px; }
.news-card h3 { margin: 0; font-size: 21px; line-height: 1.45; }
.news-card > p { color: var(--muted); }

.contact-band { padding-block: 86px; color: #fff; background: var(--ink); }
.contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; align-items: start; }
.contact-band .eyebrow { color: #65c7bf; }
.contact-form { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.contact-form label { display: grid; gap: 6px; color: #d8e0e5; font-size: 13px; }
.contact-form input, .contact-form textarea { width: 100%; border: 1px solid #46515a; border-radius: 4px; color: #fff; background: #222d37; padding: 11px 12px; outline: none; }
.contact-form input:focus, .contact-form textarea:focus { border-color: #65c7bf; }
.contact-form__wide { grid-column: 1 / -1; }
.contact-form .button { justify-self: start; }

.page-hero { padding-block: 90px 78px; color: #fff; background: linear-gradient(120deg, var(--ink), #294f62); }
.page-hero h1 { max-width: 900px; margin: 0; font-size: clamp(38px, 5vw, 62px); line-height: 1.2; }
.page-hero p:last-child { max-width: 700px; color: #d7e1e6; }
.prose { max-width: 900px; font-size: 17px; }
.prose h2 { margin-top: 42px; font-size: 30px; }
.prose h3 { margin-top: 32px; font-size: 23px; }
.prose p { color: #39464f; }
.prose img { margin-block: 28px; border-radius: 6px; }
.article-image { margin-bottom: 38px; }
.content-list { display: grid; gap: 1px; }
.list-item { padding: 28px 0; border-bottom: 1px solid var(--line); }
.list-item h2 { margin: 0; font-size: 26px; }
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; padding-block: 80px; }
.product-detail__media { aspect-ratio: 4 / 3; overflow: hidden; border-radius: 6px; background: var(--soft); }
.product-detail__media img { width: 100%; height: 100%; object-fit: cover; }
.product-detail__intro h1 { margin: 0; font-size: clamp(36px, 5vw, 58px); line-height: 1.2; }
.product-detail__summary { margin: 22px 0 30px; color: var(--muted); font-size: 18px; }

.site-footer { padding-top: 62px; color: #dbe2e6; background: #111920; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr 1fr; gap: 60px; }
.footer-brand { color: #fff; font-size: 22px; font-weight: 800; }
.site-footer h2 { margin: 0 0 12px; color: #fff; font-size: 15px; }
.site-footer p { margin: 7px 0; color: #9eabb4; }
.site-footer a { color: #65c7bf; }
.footer-bottom { margin-top: 48px; padding-block: 22px; border-top: 1px solid #2d3740; color: #7f8c95; font-size: 13px; }

@media (max-width: 980px) {
  .site-header__inner { grid-template-columns: auto 1fr auto; }
  .nav-toggle { display: inline-grid; place-items: center; justify-self: end; }
  .header-contact { display: none; }
  .primary-nav { position: absolute; top: 74px; left: 0; right: 0; display: none; padding: 16px 20px 24px; background: #fff; border-bottom: 1px solid var(--line); }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { align-items: stretch; flex-direction: column; gap: 0; }
  .primary-nav a { display: block; padding: 11px 0; }
  .product-grid, .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid div:nth-child(2) { border-right: 0; }
  .trust-grid div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 680px) {
  .shell { width: min(calc(100% - 28px), var(--shell)); }
  .section { padding-block: 64px; }
  .brand span { display: none; }
  .hero { min-height: 690px; background-position: 62% center; }
  .hero__shade { background: linear-gradient(180deg, #fff 0%, #fff 72%, rgba(255,255,255,.9) 100%); }
  .hero__content { padding-block: 70px 120px; }
  .hero h1 { font-size: 43px; }
  .hero__lead { font-size: 27px; }
  .hero__copy { font-size: 16px; }
  .hero__actions { align-items: stretch; flex-direction: column; max-width: 240px; }
  .trust-strip { margin-top: -70px; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .trust-grid div { padding: 20px; }
  .product-grid, .news-grid { grid-template-columns: 1fr; }
  .section-heading { align-items: start; flex-direction: column; }
  .about-grid { gap: 34px; }
  .contact-form { grid-template-columns: 1fr; }
  .contact-form__wide { grid-column: auto; }
  .product-detail { grid-template-columns: 1fr; gap: 34px; padding-block: 42px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}