:root{--navy:#0b2545;--blue:#1464b4;--blue-d:#0e4d92;--accent:#ff8a00;--bg:#f6f8fb;--txt:#22303e;--muted:#5c6b7a;--card:#fff;--radius:14px;--shadow:0 8px 30px rgba(11,37,69,.08)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans Thai','Prompt',-apple-system,'Segoe UI',Arial,sans-serif;color:var(--txt);background:var(--bg);line-height:1.75;font-size:16px}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none;transition:.25s}
a:hover{color:var(--accent)}
h1,h2,h3,h4{font-family:'Prompt','Noto Sans Thai',sans-serif;color:var(--navy);line-height:1.35;font-weight:600}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
/* ---------- header ---------- */
.topbar{background:var(--navy);color:#cfe0f5;font-size:.85rem;padding:6px 0}
.topbar .container{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.topbar span{white-space:nowrap}
header.site{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 2px 14px rgba(11,37,69,.09)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 20px;max-width:1180px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px}
.brand img{height:48px;width:auto}
.brand .bname{font-family:'Prompt',sans-serif;font-weight:700;color:var(--navy);font-size:1.05rem;line-height:1.2}
.brand .bname small{display:block;font-weight:400;color:var(--muted);font-size:.72rem;letter-spacing:.4px}
nav.main ul{display:flex;list-style:none;gap:6px;align-items:center}
nav.main a{display:block;padding:10px 14px;color:var(--txt);font-weight:500;border-radius:8px;font-size:.95rem}
nav.main a:hover,nav.main a.active{color:var(--blue);background:#eaf2fb}
.btn{display:inline-block;padding:12px 28px;border-radius:10px;font-weight:600;font-family:'Prompt',sans-serif;cursor:pointer;border:none;font-size:.98rem;transition:.25s}
.btn-primary{background:linear-gradient(135deg,var(--accent),#ff6a00);color:#fff;box-shadow:0 6px 18px rgba(255,138,0,.35)}
.btn-primary:hover{transform:translateY(-2px);color:#fff;box-shadow:0 10px 24px rgba(255,138,0,.45)}
.btn-outline{border:2px solid #fff;color:#fff}
.btn-outline:hover{background:#fff;color:var(--navy)}
.btn-blue{background:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-d);color:#fff;transform:translateY(-2px)}
.burger{display:none;background:none;border:none;cursor:pointer;padding:8px}
.burger span{display:block;width:26px;height:3px;background:var(--navy);margin:5px 0;border-radius:2px;transition:.3s}
/* ---------- hero ---------- */
.hero{position:relative;min-height:560px;display:flex;align-items:center;background:url('/img/banner.jpg') center/cover no-repeat}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(7,25,50,.86) 0%,rgba(10,44,84,.62) 45%,rgba(10,44,84,.25) 100%)}
.hero .container{position:relative;z-index:2;color:#fff;padding-top:60px;padding-bottom:60px}
.hero h1{color:#fff;font-size:2.6rem;max-width:640px;text-shadow:0 2px 12px rgba(0,0,0,.3)}
.hero p{max-width:600px;margin:18px 0 30px;font-size:1.1rem;color:#e6eefb}
.hero .btn + .btn{margin-left:12px}
/* ---------- page header ---------- */
.page-head{background:linear-gradient(100deg,rgba(7,25,50,.88),rgba(13,60,110,.72)),url('/img/banner.jpg') center/cover no-repeat;color:#fff;padding:70px 0;text-align:center}
.page-head h1{color:#fff;font-size:2.2rem}
.page-head .crumb{margin-top:10px;font-size:.9rem;color:#cfe0f5}
.page-head .crumb a{color:#fff}
/* ---------- sections ---------- */
section{padding:72px 0}
.sec-title{text-align:center;margin-bottom:44px}
.sec-title h2{font-size:2rem;position:relative;display:inline-block;padding-bottom:14px}
.sec-title h2::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:64px;height:4px;border-radius:2px;background:var(--accent)}
.sec-title p{color:var(--muted);margin-top:12px;max-width:720px;margin-left:auto;margin-right:auto}
.grid{display:grid;gap:26px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:.3s}
.card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(11,37,69,.15)}
.card .thumb{overflow:hidden;background:#fff;display:flex;align-items:center;justify-content:center}
.card .thumb img{width:100%;height:auto;object-fit:cover;transition:.5s}
.card:hover .thumb img{transform:scale(1.05)}
.card .body{padding:20px 22px 24px}
.card h3{font-size:1.08rem;margin-bottom:8px}
.card p{font-size:.92rem;color:var(--muted)}
.badge{display:inline-block;background:#eaf2fb;color:var(--blue);font-size:.75rem;font-weight:600;padding:3px 12px;border-radius:20px;margin-bottom:10px}
/* stats */
.stats{background:var(--navy);color:#fff}
.stats .g4{text-align:center}
.stats .num{font-family:'Prompt',sans-serif;font-size:2.4rem;font-weight:700;color:#ffb25e}
.stats .lbl{color:#cfe0f5;font-size:.95rem}
/* about split */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow)}
.split .txt h2{font-size:1.9rem;margin-bottom:18px}
.split .txt p{margin-bottom:14px;color:#3c4b5b}
/* industries */
.ind-item{background:#fff;border-radius:var(--radius);padding:26px 20px;text-align:center;box-shadow:var(--shadow);border-bottom:4px solid transparent;transition:.3s}
.ind-item:hover{border-bottom-color:var(--accent);transform:translateY(-5px)}
.ind-item .ic{width:58px;height:58px;margin:0 auto 14px;border-radius:14px;background:linear-gradient(135deg,#eaf2fb,#d7e7fa);display:flex;align-items:center;justify-content:center;color:var(--blue)}
.ind-item .ic svg{width:30px;height:30px}
.ind-item h3{font-size:1rem}
/* cases */
.case-card{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.case-card img{width:100%;height:100%;object-fit:cover;transition:.5s}
.case-card:hover img{transform:scale(1.06)}
.case-card .cap{position:absolute;left:0;right:0;bottom:0;background:linear-gradient(transparent,rgba(7,25,50,.92));color:#fff;padding:40px 18px 14px;font-weight:500}
/* features list */
.checklist{list-style:none;margin:18px 0}
.checklist li{padding:9px 0 9px 34px;position:relative;border-bottom:1px dashed #dde6ef}
.checklist li::before{content:"";position:absolute;left:2px;top:14px;width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(255,138,0,.18)}
/* CTA band */
.cta-band{background:linear-gradient(115deg,var(--navy),#134a86);color:#fff;text-align:center;padding:64px 20px}
.cta-band h2{color:#fff;font-size:1.9rem;margin-bottom:12px}
.cta-band p{color:#cfe0f5;max-width:640px;margin:0 auto 26px}
/* product detail */
.pd-wrap{display:grid;grid-template-columns:1fr 1.15fr;gap:44px;align-items:start}
.pd-wrap .pic{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.pd-wrap .pic img{width:100%}
.pd-wrap h1{font-size:1.8rem;margin-bottom:6px}
.pd-wrap .sub{color:var(--muted);margin-bottom:18px;font-size:.95rem}
.pd-sec{margin-top:26px}
.pd-sec h3{font-size:1.15rem;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.pd-sec h3::before{content:"";width:8px;height:22px;border-radius:3px;background:var(--accent);display:inline-block}
.pd-wrap p{margin-bottom:12px;color:#3c4b5b}
/* faq */
.faq-item{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:20px 24px;font-weight:600;font-family:'Prompt',sans-serif;color:var(--navy);list-style:none;position:relative;padding-right:52px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:1.5rem;color:var(--accent);transition:.3s}
.faq-item[open] summary::after{content:"–"}
.faq-item .ans{padding:0 24px 22px;color:#3c4b5b}
/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.3fr;gap:44px;align-items:start}
.form-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:34px}
.field{margin-bottom:18px}
.field label{display:block;font-weight:600;margin-bottom:7px;font-size:.93rem;color:var(--navy)}
.field label em{color:#d33;font-style:normal}
.field input,.field textarea{width:100%;padding:12px 14px;border:1.5px solid #d7e0ea;border-radius:9px;font:inherit;font-size:.95rem;background:#fbfdff;transition:.2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(20,100,180,.12)}
.form-note{font-size:.85rem;color:var(--muted);margin-top:14px}
.alert{padding:14px 18px;border-radius:10px;margin-bottom:20px;font-size:.93rem}
.alert.ok{background:#e7f7ec;color:#186a3b;border:1px solid #b7e4c7}
.alert.err{background:#fdecec;color:#9b2226;border:1px solid #f5c2c7}
/* footer */
footer.site{background:#081a33;color:#9fb4cc;padding:60px 0 0;font-size:.92rem}
footer.site h4{color:#fff;font-size:1.02rem;margin-bottom:16px}
footer.site a{color:#c7d6e8}
footer.site a:hover{color:var(--accent)}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:40px}
.f-grid ul{list-style:none}
.f-grid li{margin-bottom:9px}
.f-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;text-align:center;font-size:.85rem;color:#7189a3}
.fab-cta{position:fixed;right:22px;bottom:22px;z-index:90}
.fab-cta a{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;padding:13px 22px;border-radius:40px;font-weight:700;box-shadow:0 8px 24px rgba(255,138,0,.45)}
.fab-cta a:hover{transform:translateY(-3px)}
/* responsive */
@media(max-width:960px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .split,.pd-wrap,.contact-grid{grid-template-columns:1fr}
  .hero h1{font-size:2rem}
  .f-grid{grid-template-columns:1fr 1fr}
  nav.main{position:fixed;inset:64px 0 auto 0;background:#fff;box-shadow:0 14px 24px rgba(11,37,69,.15);transform:translateY(-130%);transition:.35s;z-index:99}
  nav.main.open{transform:translateY(0)}
  nav.main ul{flex-direction:column;align-items:stretch;padding:14px 18px;gap:2px}
  .burger{display:block}
  .nav-cta{display:none}
}
@media(max-width:560px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr}
  .hero{min-height:480px}
  .hero .btn{width:100%;text-align:center}
  .hero .btn + .btn{margin-left:0;margin-top:10px}
  section{padding:52px 0}
  .fab-cta{right:12px;bottom:12px}
}