:root{
  --bg:#ffffff;
  --surface:#f4f6f8;
  --surface-2:#eef2f5;
  --ink:#16202a;
  --muted:#5b6b7a;
  --primary:#0d3b66;
  --primary-d:#0a2c4d;
  --accent:#e07a1f;
  --accent-d:#c4680f;
  --border:#e1e7ec;
  --ok:#1f8a4c;
  --shadow:0 6px 24px rgba(13,59,102,.08);
  --radius:10px;
  --maxw:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:"Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,"Noto Sans",
    "Noto Sans Thai","Noto Sans Arabic","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px;
}
[dir="rtl"] body{font-family:"Segoe UI",system-ui,"Noto Sans Arabic","Noto Sans Thai","Microsoft YaHei",Arial,sans-serif}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--accent)}
h1,h2,h3,h4{line-height:1.25;color:var(--primary);margin:0 0 .5em}
h1{font-size:clamp(28px,4vw,44px)}
h2{font-size:clamp(22px,3vw,32px)}
h3{font-size:20px}
p{margin:0 0 1em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-999px;top:auto;background:var(--primary);color:#fff;padding:8px 14px;z-index:200}
.skip-link:focus{left:8px;top:8px}
.btn{display:inline-block;padding:11px 20px;border-radius:8px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:.15s}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-d);color:#fff}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d);color:#fff}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--ink)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}

/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;gap:18px;height:68px}
.brand{display:flex;flex-direction:column;line-height:1.05;color:var(--primary)}
.brand-mark{font-weight:800;font-size:20px;letter-spacing:.5px}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:.5px}
.main-nav{flex:1}
.main-nav ul{display:flex;gap:6px;list-style:none;margin:0;padding:0}
.main-nav a{display:block;padding:9px 13px;border-radius:8px;color:var(--ink);font-weight:500}
.main-nav a:hover,.main-nav a.active{background:var(--surface);color:var(--primary)}
.header-actions{display:flex;align-items:center;gap:12px}
.lang-switch{position:relative}
.lang-toggle{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:8px 12px;font-size:13px;cursor:pointer;color:var(--ink)}
.lang-menu{position:absolute;top:calc(100% + 8px);right:0;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow);list-style:none;margin:0;padding:6px;min-width:150px;display:none}
[dir="rtl"] .lang-menu{right:auto;left:0}
.lang-menu.open{display:block}
.lang-menu a{display:flex;justify-content:space-between;padding:8px 12px;border-radius:8px;color:var(--ink)}
.lang-menu a:hover{background:var(--surface)}
.menu-toggle{display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer;padding:8px}
.menu-toggle span{width:22px;height:2px;background:var(--ink);display:block}

/* Hero */
.hero{position:relative;overflow:hidden;background:
  repeating-linear-gradient(135deg, rgba(255,255,255,.05) 0 2px, transparent 2px 28px),
  linear-gradient(135deg,var(--primary),var(--primary-d));
  color:#fff;padding:76px 0}
.hero::after{content:"";position:absolute;top:-10%;right:-5%;width:46%;height:120%;
  background:repeating-linear-gradient(45deg, rgba(255,255,255,.06) 0 16px, transparent 16px 32px);
  transform:skewX(-14deg);pointer-events:none}
.hero .container{position:relative;z-index:1}
.hero h1{color:#fff;font-size:39px;line-height:1.16;font-weight:800;letter-spacing:-.5px;max-width:780px;margin:6px 0 0}
.hero p{color:#d7e3ef;font-size:18px;line-height:1.6;max-width:600px;margin-top:15px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.hero .btn-accent{font-size:16px;padding:15px 28px;animation:heroPulse 2.6s ease-in-out infinite}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.55);display:inline-flex;align-items:center}
.hero .btn-ghost::before{content:"";width:0;height:0;border-style:solid;border-width:5px 0 5px 8px;border-color:transparent transparent transparent currentColor;margin-right:9px}
.hero .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}
.cert-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:34px}
.cert-pill{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);padding:6px 12px;border-radius:30px;font-size:13px}
.cert-more{color:#ffd9b0;font-size:13px;font-weight:600;text-decoration:underline;text-underline-offset:3px}
.cert-more:hover{color:#ffc590}
@keyframes heroPulse{0%,100%{box-shadow:0 0 0 0 rgba(216,90,48,.45)}50%{box-shadow:0 0 0 12px rgba(216,90,48,0)}}

/* Sections */
.section{padding:56px 0}
.section.alt{background:var(--surface)}
.section-head{margin-bottom:32px;max-width:720px}
.section-head p{color:var(--muted)}
.eyebrow{text-transform:uppercase;letter-spacing:1.5px;font-size:13px;color:var(--accent);font-weight:700;margin:0 0 8px}

/* Product grid */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.15s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.card-media{height:160px;background:linear-gradient(135deg,#dfe7ee,#c7d3de);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:800;font-size:15px;letter-spacing:1px;overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;display:block}
.detail-media{height:240px;border-radius:var(--radius)}
.brand-logo{height:38px;width:auto;display:block;object-fit:contain}
.footer-logo-img{height:44px;background:#fff;padding:4px 8px;border-radius:6px}
.card-body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-body h3{margin:0;font-size:18px}
.card-body p{color:var(--muted);font-size:14px;margin:0;flex:1}
.card-meta{display:flex;gap:8px;flex-wrap:wrap;font-size:12px;color:var(--muted)}
.tag{background:var(--surface-2);border-radius:20px;padding:3px 10px}
.card-foot{padding:0 18px 18px}

/* Feature / why */
.feature{display:flex;gap:14px;align-items:flex-start}
.feature .ic{flex:0 0 44px;height:44px;border-radius:10px;background:var(--surface-2);display:flex;align-items:center;justify-content:center;color:var(--primary);font-weight:800}
.feature h3{font-size:17px;margin:0 0 4px}
.feature p{margin:0;color:var(--muted);font-size:14px}

/* Specs table */
.specs{width:100%;border-collapse:collapse;margin-top:8px}
.specs th,.specs td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--border);vertical-align:top}
[dir="rtl"] .specs th,[dir="rtl"] .specs td{text-align:right}
.specs th{width:200px;background:var(--surface);color:var(--muted);font-weight:600;font-size:14px}
.specs td{color:var(--ink)}

/* Breadcrumb */
.breadcrumb{padding:14px 0 0;font-size:13px;color:var(--muted)}
.breadcrumb .container{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.breadcrumb a{color:var(--muted)}
.breadcrumb span.sep{opacity:.5}
.breadcrumb .current{color:var(--primary);font-weight:600}

/* Footer */
.site-footer{background:var(--primary-d);color:#cdd9e5;margin-top:40px;padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px}
.footer-logo{color:#fff;font-size:22px}
.footer-tagline{color:#9fb3c6;font-size:14px;max-width:300px}
.footer-contact a{color:#cdd9e5;display:block;font-size:14px}
.footer-col h4{color:#fff;font-size:14px;text-transform:uppercase;letter-spacing:1px;margin-bottom:14px}
.footer-links{list-style:none;margin:0;padding:0}
.footer-links li{margin-bottom:8px}
.footer-links a{color:#cdd9e5;font-size:14px}
.footer-links a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding:18px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:#9fb3c6}
.footer-certs{color:#9fb3c6}

/* Floating contact */
.floating-contact{position:fixed;bottom:22px;right:22px;display:flex;flex-direction:column;gap:12px;z-index:120}
[dir="rtl"] .floating-contact{right:auto;left:22px}
.float-btn{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 6px 18px rgba(0,0,0,.25);transition:.15s}
.float-btn:hover{transform:scale(1.06)}
.float-wa{background:#25d366}
.float-fb{background:#1877f2}

/* Blog */
.blog-card{display:flex;flex-direction:column}
.blog-date{font-size:13px;color:var(--muted)}
.blog-excerpt{color:var(--muted);font-size:14px}
.article{max-width:760px;margin:0 auto}
.article .meta{color:var(--muted);font-size:14px;margin-bottom:18px}
.article h2{margin-top:1.4em}
.article table{border-collapse:collapse;width:100%;margin:18px 0}
.article th,.article td{border:1px solid var(--border);padding:10px 12px;text-align:left}
[dir="rtl"] .article th,[dir="rtl"] .article td{text-align:right}
.article th{background:var(--surface)}
.article pre{background:var(--surface-2);padding:14px;border-radius:8px;overflow:auto}

/* Forms */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:14px;font-weight:600}
.field input,.field textarea,.field select{padding:11px 13px;border:1px solid var(--border);border-radius:8px;font:inherit;background:#fff}
.field input:focus,.field textarea:focus{border-color:var(--primary);outline:none}
.alert{background:#e7f6ec;border:1px solid #b6e3c6;color:#1c6b3a;padding:12px 16px;border-radius:8px}

/* Contact cards */
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.contact-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px}
.contact-card h3{margin-top:0}
.contact-card a{font-weight:600}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--accent),var(--accent-d));color:#fff;border-radius:14px;padding:34px;text-align:center}
.cta-band h2{color:#fff}
.cta-band p{color:#fff4e8}

/* Responsive */
@media (max-width:900px){
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-cards{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .main-nav{position:fixed;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;padding:10px 20px;display:none;box-shadow:var(--shadow)}
  [dir="rtl"] .main-nav{left:0;right:0}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:2px}
  .menu-toggle{display:flex}
  .header-cta{display:none}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero{padding:48px 0}
  .hero h1{font-size:27px}
  .hero p{font-size:16px}
  .hero::after{display:none}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero .btn{width:100%;text-align:center;justify-content:center}
}
/* category filter bar */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin:8px 0 28px}
.chip{appearance:none;border:1px solid var(--border);background:#fff;color:var(--muted);
  padding:8px 16px;border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip.active{background:var(--primary);border-color:var(--primary);color:#fff}

/* Certificate gallery */
.cert-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cert-fig{margin:0;background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.15s}
.cert-fig:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.cert-thumb{position:relative;display:block;cursor:zoom-in;background:var(--surface-2);aspect-ratio:4/3;overflow:hidden}
.cert-thumb img{width:100%;height:100%;object-fit:contain}
.cert-zoom{position:absolute;right:10px;bottom:10px;background:rgba(13,59,102,.85);color:#fff;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:15px;opacity:0;transition:.15s}
.cert-thumb:hover .cert-zoom{opacity:1}
.cert-fig figcaption{padding:14px 16px}
.cert-fig figcaption strong{display:block;color:var(--primary);font-size:15px;line-height:1.3}
.cert-fig figcaption span{display:block;color:var(--muted);font-size:13px;margin-top:3px}
.cert-hint{margin-top:26px;color:var(--muted);font-size:14px;text-align:center}
/* Lightbox */
.lightbox{position:fixed;inset:0;background:rgba(8,20,33,.92);display:none;align-items:center;justify-content:center;z-index:300;padding:30px;flex-direction:column}
.lightbox.open{display:flex}
.lightbox-img{max-width:92vw;max-height:82vh;box-shadow:0 10px 40px rgba(0,0,0,.5);background:#fff}
.lightbox-cap{color:#dce6f0;margin-top:14px;text-align:center;max-width:90vw;font-size:15px}
.lightbox-close{position:absolute;top:16px;right:22px;background:none;border:0;color:#fff;font-size:34px;cursor:pointer;line-height:1;padding:4px 10px}
.lightbox-close:hover{color:var(--accent)}
@media (max-width:900px){.cert-gallery{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.cert-gallery{grid-template-columns:1fr}}