:root{
  --navy:#0d2137; --blue:#1265a8; --blue2:#1a8fdd; --sky:#eaf4fb;
  --text:#26313c; --muted:#5b6b7a; --line:#dfe7ee; --bg:#ffffff;
  --radius:14px; --shadow:0 10px 30px rgba(13,33,55,.10);
  --shadow-lg:0 18px 50px rgba(13,33,55,.16);
  font-size:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
ul{list-style:none}
.container{width:min(1180px,92%);margin:0 auto}
h1,h2,h3,h4{color:var(--navy);line-height:1.25;font-weight:700}
h1{font-size:clamp(1.9rem,4vw,3rem)}
h2{font-size:clamp(1.5rem,3vw,2.2rem)}
h3{font-size:1.15rem}

/* ---------- buttons ---------- */
.btn{display:inline-block;padding:.8rem 1.6rem;border-radius:999px;font-weight:600;
  letter-spacing:.02em;transition:.25s;border:2px solid transparent;cursor:pointer;font-size:1rem}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--blue2),var(--blue));color:#fff;box-shadow:0 8px 20px rgba(18,101,168,.35)}
.btn-primary:hover{color:#fff;box-shadow:0 12px 26px rgba(18,101,168,.45)}
.btn-light{background:#fff;color:var(--blue);border-color:#fff}
.btn-light:hover{color:var(--navy)}
.btn-outline{border-color:var(--blue);color:var(--blue);background:transparent}
.btn-outline:hover{background:var(--blue);color:#fff}
.btn-nav{padding:.5rem 1.2rem;font-size:.92rem}
.btn-lg{padding:1rem 2.2rem;font-size:1.05rem}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.55rem 0}
.brand{display:flex;align-items:center;gap:.65rem}
.brand:hover{text-decoration:none}
.brand-name{font-size:1.15rem;color:var(--navy);font-weight:400;letter-spacing:.01em}
.brand-name strong{font-weight:800;color:var(--blue)}
.main-nav ul{display:flex;align-items:center;gap:1.4rem}
.main-nav a{color:var(--text);font-weight:600;font-size:.97rem;padding:.35rem 0;position:relative}
.main-nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--blue2);transition:.25s}
.main-nav a:hover::after,.main-nav a.active::after{width:100%}
.main-nav a:hover{text-decoration:none}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:.4rem}
.nav-toggle span{display:block;width:24px;height:3px;background:var(--navy);margin:5px 0;border-radius:2px;transition:.3s}

/* ---------- hero ---------- */
.hero{position:relative;min-height:min(640px,78vh);display:flex;align-items:center;
  background:linear-gradient(rgba(9,28,47,.62),rgba(9,28,47,.62)),url("/img/banner.jpg") center/cover no-repeat}
.hero-content{color:#fff;max-width:760px;padding:5rem 0}
.hero h1{color:#fff;margin-bottom:1rem}
.hero p{font-size:clamp(1rem,2vw,1.2rem);opacity:.92;margin-bottom:2rem}
.hero .btn+.btn{margin-left:.8rem}
.hero-badges{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:2.2rem}
.hero-badges span{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.35);
  padding:.35rem .9rem;border-radius:999px;font-size:.85rem;backdrop-filter:blur(4px)}

/* ---------- sections ---------- */
section{padding:4.2rem 0}
.section-head{max-width:720px;margin:0 auto 2.6rem;text-align:center}
.section-head .kicker{display:inline-block;color:var(--blue2);font-weight:700;
  text-transform:uppercase;font-size:.8rem;letter-spacing:.14em;margin-bottom:.6rem}
.section-head p{color:var(--muted)}
.bg-alt{background:var(--sky)}

/* cards / grids */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1.4rem}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.3s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card img{width:100%;aspect-ratio:3/2;object-fit:cover}
.card-body{padding:1.2rem 1.3rem 1.4rem;display:flex;flex-direction:column;gap:.5rem;flex:1}
.card-body p{color:var(--muted);font-size:.94rem}
.card-link{font-weight:700;color:var(--blue)}
.card-link:hover{color:var(--blue2)}

/* features */
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:1.5rem;box-shadow:var(--shadow)}
.feature .num{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:12px;background:linear-gradient(135deg,var(--blue2),var(--blue));color:#fff;
  font-weight:800;font-size:1.1rem;margin-bottom:.9rem}
.feature h3{margin-bottom:.4rem;font-size:1.05rem}
.feature p{color:var(--muted);font-size:.94rem}

/* split section */
.split{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%}
.split h2{margin-bottom:1rem}
.split p{color:var(--muted);margin-bottom:1rem}
.check-list{margin:1.2rem 0 1.6rem}
.check-list li{padding-left:1.9rem;position:relative;margin-bottom:.55rem;color:var(--text);font-weight:500}
.check-list li::before{content:"✔";position:absolute;left:0;top:0;color:var(--blue2);font-weight:800}

/* cases */
.case-card{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.case-card img{aspect-ratio:4/3;object-fit:cover;width:100%;transition:.4s}
.case-card:hover img{transform:scale(1.06)}
.case-card figcaption{position:absolute;left:0;right:0;bottom:0;
  background:linear-gradient(transparent,rgba(9,28,47,.9));color:#fff;
  padding:2.2rem 1rem .9rem;font-weight:600}

/* certs */
.cert-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.3s}
.cert-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.cert-card img{aspect-ratio:1322/1870;object-fit:cover;width:100%}
.cert-card figcaption{padding:.75rem .9rem;font-size:.88rem;font-weight:600;color:var(--navy);text-align:center}

/* ---------- page hero (inner pages) ---------- */
.page-hero{background:linear-gradient(rgba(9,28,47,.66),rgba(9,28,47,.66)),
  url("/img/banner.jpg") center/cover no-repeat;color:#fff;padding:4.5rem 0 3.4rem}
.page-hero h1{color:#fff;margin-bottom:.6rem}
.page-hero p{max-width:720px;opacity:.92}
.breadcrumb{font-size:.88rem;margin-top:1rem;opacity:.85}
.breadcrumb a{color:#cfe6f7}
.breadcrumb a:hover{color:#fff}

/* ---------- products page ---------- */
.filters{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;margin-bottom:2.2rem}
.filters span{background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:.35rem 1rem;font-size:.88rem;color:var(--muted)}

/* ---------- product detail ---------- */
.product-hero{display:grid;grid-template-columns:1.05fr 1fr;gap:3rem;align-items:start}
.product-hero img{border-radius:var(--radius);box-shadow:var(--shadow-lg);width:100%;
  border:1px solid var(--line);background:#f4f8fb}
.product-hero h1{margin-bottom:.9rem}
.product-hero .lead{font-size:1.08rem;color:var(--muted);margin-bottom:1.4rem}
.tag-row{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.6rem}
.tag-row span{background:var(--sky);color:var(--blue);font-weight:600;font-size:.83rem;
  padding:.3rem .85rem;border-radius:999px}
.spec-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);margin:1rem 0 2rem}
.spec-table th,.spec-table td{padding:.8rem 1.1rem;text-align:left;border-bottom:1px solid var(--line);font-size:.95rem}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:0}
.spec-table th{width:34%;color:var(--navy);background:var(--sky);font-weight:700}
.text-block{max-width:860px}
.text-block h2{margin:2.2rem 0 .9rem}
.text-block p{color:var(--muted);margin-bottom:1rem}
.text-block h2:first-child{margin-top:0}
.more-products{display:grid;grid-template-columns:repeat(4,1fr);gap:1.3rem}
.more-products .mini{background:#fff;border:1px solid var(--line);border-radius:12px;
  overflow:hidden;box-shadow:var(--shadow);transition:.25s;text-align:center}
.more-products .mini:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.more-products img{aspect-ratio:3/2;object-fit:cover;width:100%}
.more-products span{display:block;padding:.65rem .7rem;font-size:.88rem;font-weight:600;color:var(--navy)}

/* ---------- FAQ ---------- */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);margin-bottom:.9rem;overflow:hidden}
.faq-item summary{cursor:pointer;font-weight:700;color:var(--navy);
  padding:1.05rem 1.3rem;list-style:none;position:relative;padding-right:2.8rem}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:1.2rem;top:50%;transform:translateY(-50%);
  font-size:1.5rem;color:var(--blue2);font-weight:400;transition:.25s}
.faq-item[open] summary::after{content:"–"}
.faq-item .faq-a{padding:0 1.3rem 1.15rem;color:var(--muted)}
.faq-item .faq-a p+p{margin-top:.6rem}

/* ---------- contact ---------- */
.contact-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:3rem;align-items:start}
.contact-info h2{margin-bottom:1rem}
.contact-info p{color:var(--muted);margin-bottom:1.4rem}
.info-line{display:flex;gap:.9rem;align-items:flex-start;margin-bottom:1.1rem}
.info-line .ico{flex:0 0 42px;width:42px;height:42px;border-radius:10px;
  background:var(--sky);display:flex;align-items:center;justify-content:center;color:var(--blue);font-size:1.15rem}
.info-line strong{display:block;color:var(--navy)}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:2rem;box-shadow:var(--shadow-lg)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form-group{display:flex;flex-direction:column;gap:.35rem}
.form-group.full{grid-column:1/-1}
.form-group label{font-weight:600;font-size:.92rem;color:var(--navy)}
.form-group label .req{color:#d64545}
.form-group input,.form-group select,.form-group textarea{padding:.75rem .9rem;border:1.5px solid var(--line);
  border-radius:10px;font:inherit;color:var(--text);background:#fbfdff;transition:.2s;width:100%}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  outline:none;border-color:var(--blue2);background:#fff;box-shadow:0 0 0 3px rgba(26,143,221,.15)}
.form-note{font-size:.82rem;color:var(--muted);margin-top:.8rem}
.form-msg{padding:.9rem 1.1rem;border-radius:10px;margin-bottom:1.2rem;font-weight:600}
.form-msg.ok{background:#e7f7ec;color:#1c7c3c;border:1px solid #b7e4c7}
.form-msg.err{background:#fdeaea;color:#b02a2a;border:1px solid #f3c4c4}
.hp{position:absolute;left:-9999px}

/* ---------- cta band ---------- */
.cta-band{background:linear-gradient(120deg,var(--navy),var(--blue));color:#fff;padding:3.2rem 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:2rem;flex-wrap:wrap}
.cta-inner h2{color:#fff;margin-bottom:.35rem}
.cta-inner p{opacity:.88}

/* ---------- footer ---------- */
.site-footer{background:var(--navy);color:#c6d3de;padding:3.6rem 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr 1.2fr;gap:2.4rem;padding-bottom:2.6rem}
.footer-brand{margin-bottom:1rem}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-name strong{color:#5db4e8}
.site-footer h4{color:#fff;margin-bottom:1rem;font-size:1rem}
.site-footer ul li{margin-bottom:.5rem}
.site-footer a{color:#c6d3de;font-size:.93rem}
.site-footer a:hover{color:#fff}
.site-footer p{font-size:.93rem}
.footer-addr{margin-top:.8rem;font-style:normal}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:1.2rem 0;font-size:.85rem}
.footer-bottom p{text-align:center}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .split,.contact-layout,.product-hero{grid-template-columns:1fr;gap:2.2rem}
  .more-products{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav-toggle{display:block}
  .main-nav{position:absolute;top:100%;left:0;right:0;background:#fff;
    border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);
    max-height:0;overflow:hidden;transition:max-height .35s ease}
  .main-nav.open{max-height:480px}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:0;padding:.6rem 5% 1.2rem}
  .main-nav li{border-bottom:1px solid var(--line)}
  .main-nav li:last-child{border-bottom:0;padding-top:.8rem}
  .main-nav a{display:block;padding:.8rem 0}
  .main-nav a::after{display:none}
  .hero{min-height:520px}
  .hero .btn{width:100%;text-align:center}
  .hero .btn+.btn{margin:.6rem 0 0}
  .grid-3,.grid-4{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .cta-inner{justify-content:center;text-align:center}
  section{padding:3rem 0}
  .footer-grid{grid-template-columns:1fr}
}