:root{
  --blue:#1168d9;
  --blue-dark:#0c54b0;
  --text:#222;
  --muted:#6b7280;
  --bg:#f6f8fc;
  --line:#e5e7eb;
  --white:#ffffff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:#fff;line-height:1.6}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:min(1200px,92%);margin:0 auto}
.topbar{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:84px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:#0b4aa0;font-size:28px;letter-spacing:.5px}
.brand .mark{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#0b5ed7,#4ca1ff);color:#fff;display:grid;place-items:center;font-size:24px;box-shadow:0 10px 30px rgba(17,104,217,.2)}
.brand small{display:block;color:#111;font-size:13px;font-weight:700;letter-spacing:.08em}
.navlinks{display:flex;flex-wrap:wrap;align-items:center;gap:20px;font-size:14px;font-weight:700}
.navlinks a{padding:8px 0;position:relative}
.navlinks a.active::after,.navlinks a:hover::after{content:'';position:absolute;left:0;right:0;bottom:-8px;height:3px;border-radius:999px;background:var(--blue)}
.head-contact{display:flex;align-items:center;gap:20px;font-weight:700;color:var(--blue)}
.hero{background:linear-gradient(rgba(255,255,255,.72),rgba(255,255,255,.72)),url('images/hero.jpg') center right/cover no-repeat}
.hero-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;min-height:620px}
.hero h1{font-size:62px;line-height:1.06;margin:0 0 14px;color:#0f2544}
.hero h1 span{color:var(--blue)}
.hero p{font-size:20px;color:#374151;max-width:640px;margin:0 0 28px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 24px;border-radius:8px;font-weight:800;font-size:15px;transition:.2s}
.btn.primary{background:var(--blue);color:#fff}
.btn.primary:hover{background:var(--blue-dark)}
.btn.ghost{border:1px solid var(--blue);color:var(--blue);background:#fff}
.hero-side{display:flex;justify-content:flex-end}
.hero-card{width:min(520px,100%);background:rgba(255,255,255,.92);backdrop-filter:blur(8px);padding:22px;border-radius:18px;box-shadow:0 20px 60px rgba(15,37,68,.12)}
.hero-card img{border-radius:14px}
.section{padding:72px 0}
.section.gray{background:var(--bg)}
.section-title{text-align:center;margin-bottom:44px}
.section-title h2{font-size:38px;margin:0 0 8px}
.section-title p{margin:0;color:var(--muted);font-size:17px}
.products-layout{display:grid;grid-template-columns:280px 1fr;gap:26px;align-items:start}
.sidebar{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 10px 30px rgba(15,37,68,.05)}
.sidebar h3{margin:0;padding:20px 22px;background:linear-gradient(135deg,#0b5ed7,#3da2ff);color:#fff;font-size:20px}
.sidebar a{display:flex;justify-content:space-between;gap:8px;padding:15px 22px;border-bottom:1px solid var(--line);font-weight:700;color:#374151}
.sidebar a:last-child{border-bottom:0}
.sidebar a:hover{background:#f8fbff;color:var(--blue)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 10px 30px rgba(15,37,68,.05);display:flex;flex-direction:column}
.card .thumb{aspect-ratio:4/3;overflow:hidden;background:#f3f4f6}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.card:hover .thumb img{transform:scale(1.04)}
.card .content{padding:18px}
.card h3{margin:0 0 8px;font-size:21px;line-height:1.25}
.card p{margin:0 0 14px;color:var(--muted);font-size:15px}
.link{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:800}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}
.about-box{background:#fff;padding:28px;border-radius:18px;border:1px solid var(--line);box-shadow:0 10px 30px rgba(15,37,68,.05)}
.list{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:16px}
.list div{background:#f8fbff;border:1px solid #dceaff;border-radius:12px;padding:14px;font-weight:700;color:#174ea6}
.app-grid,.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.app,.stat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;text-align:center}
.app h4,.stat h4{margin:12px 0 6px;font-size:18px}
.stat .num{font-size:34px;font-weight:800;color:var(--blue);line-height:1}
.cta{background:linear-gradient(135deg,#0f5fd4,#4da1ff);color:#fff;padding:56px 0}
.cta-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.cta h2{margin:0 0 8px;font-size:40px}
.cta p{margin:0;color:#e9f3ff}
.footer{background:#0f172a;color:#cbd5e1;padding:52px 0 18px}
.footer-grid{display:grid;grid-template-columns:1.1fr .8fr .9fr;gap:26px}
.footer h4{color:#fff;margin:0 0 16px}
.footer a{color:#cbd5e1;display:block;margin:8px 0}
.copy{padding-top:18px;margin-top:22px;border-top:1px solid rgba(255,255,255,.12);font-size:14px;color:#94a3b8}
.page-hero{background:linear-gradient(135deg,#edf5ff,#f8fbff);padding:64px 0;border-bottom:1px solid var(--line)}
.page-hero h1{margin:0;font-size:42px}
.page-hero p{margin:10px 0 0;color:var(--muted)}
.page-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:start}
.detail-image{background:#fff;border:1px solid var(--line);padding:14px;border-radius:18px;box-shadow:0 10px 30px rgba(15,37,68,.05)}
.detail-image img{border-radius:14px;width:100%;aspect-ratio:4/3;object-fit:cover}
.detail-panel{background:#fff;border:1px solid var(--line);padding:28px;border-radius:18px;box-shadow:0 10px 30px rgba(15,37,68,.05)}
.detail-panel h2{margin:0 0 12px;font-size:34px}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0}
.badge{background:#eef5ff;color:#174ea6;border:1px solid #dceaff;padding:8px 12px;border-radius:999px;font-weight:700;font-size:13px}
.specs{margin:18px 0 0;padding:0;list-style:none;border-top:1px solid var(--line)}
.specs li{padding:14px 0;border-bottom:1px solid var(--line)}
.contact-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 10px 30px rgba(15,37,68,.05)}
.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px}
.floatbar{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;display:flex;flex-direction:column;gap:10px}
.floatbar a{width:56px;height:56px;border-radius:14px;background:#fff;color:var(--blue);display:grid;place-items:center;border:1px solid var(--line);box-shadow:0 14px 30px rgba(15,37,68,.12);font-size:13px;font-weight:800;text-align:center;padding:4px}
@media (max-width:1100px){
  .grid{grid-template-columns:repeat(3,1fr)}
  .app-grid,.stats{grid-template-columns:repeat(2,1fr)}
  .products-layout,.about-grid,.page-grid,.footer-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .nav{padding:10px 0;align-items:flex-start;flex-direction:column}
  .navlinks{gap:14px}
  .hero-wrap{grid-template-columns:1fr;min-height:auto;padding:60px 0}
  .hero h1{font-size:42px}
  .hero p{font-size:17px}
  .grid,.contact-cards{grid-template-columns:1fr 1fr}
  .list{grid-template-columns:1fr}
}
@media (max-width:520px){
  .grid,.contact-cards,.app-grid,.stats{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .section-title h2,.cta h2,.page-hero h1{font-size:30px}
  .floatbar{display:none}
}

/* v2 additions */
.gradebar{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0 18px}
.gradebar a,.gradechip{display:inline-flex;align-items:center;padding:7px 11px;border-radius:999px;background:#eef5ff;color:#174ea6;border:1px solid #d8e8ff;font-size:12px;font-weight:800}
.material-kicker{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#1168d9;font-weight:900;margin-bottom:6px}
.product-groups{display:grid;gap:50px}
.group-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:20px;border-bottom:1px solid var(--line);padding-bottom:14px}
.group-head h2{margin:0;font-size:30px}
.group-head p{margin:0;color:var(--muted)}
.rfq-wrap{display:grid;grid-template-columns:.8fr 1.2fr;gap:28px;align-items:start}
.rfq-form{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:0 10px 30px rgba(15,37,68,.05)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:800;color:#334155}
.field input,.field select,.field textarea{width:100%;padding:12px 13px;border:1px solid #d8dee8;border-radius:10px;font:inherit;background:#fff}
.field textarea{min-height:130px;resize:vertical}
.form-note{font-size:13px;color:#64748b;margin-top:12px}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.article-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 10px 30px rgba(15,37,68,.05)}
.article-card .date{font-size:12px;color:#64748b;font-weight:800;text-transform:uppercase;letter-spacing:.08em}
.article-card h3{font-size:21px;line-height:1.3;margin:8px 0 10px}
.article-body{max-width:850px;margin:0 auto}
.article-body h2{font-size:28px;margin:34px 0 10px}
.article-body p{font-size:17px;color:#475569}
.contact-mini{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.contact-pill{display:inline-flex;padding:9px 12px;border-radius:999px;background:#f8fbff;border:1px solid #dceaff;color:#174ea6;font-weight:800;font-size:13px}
@media(max-width:900px){.rfq-wrap{grid-template-columns:1fr}.article-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.form-grid,.article-grid{grid-template-columns:1fr}.field.full{grid-column:auto}}

.category-nav{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 8px}.category-nav a{display:inline-flex;padding:10px 14px;border:1px solid #dceaff;background:#fff;border-radius:999px;color:#174ea6;font-weight:800}.category-nav a:hover{background:#eef5ff}.product-category-section{scroll-margin-top:110px;margin-bottom:56px}.product-category-section:last-child{margin-bottom:0}.category-major{background:#f8fbff;color:#174ea6!important;font-weight:800!important}.product-category-section .group-head{margin-bottom:20px}.product-category-section .group-head h2{margin-bottom:4px}.product-category-section .group-head p{margin-top:0;color:#6b7280}