:root{
  --navy:#0b1f33;--navy2:#12314e;--blue:#0e5aa7;--accent:#f5871f;--accent2:#ff9f3d;
  --sky:#eaf3fb;--text:#2a3542;--muted:#5c6b7a;--line:#dde7f0;--white:#fff;
  --radius:14px;--shadow:0 10px 30px rgba(11,31,51,.10);--shadow-sm:0 4px 14px rgba(11,31,51,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Sarabun','Kanit',-apple-system,'Segoe UI',sans-serif;color:var(--text);background:var(--white);line-height:1.75;font-size:16px}
h1,h2,h3,h4{font-family:'Kanit','Sarabun',sans-serif;color:var(--navy);line-height:1.3;font-weight:600}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none;transition:.2s}
a:hover{color:var(--accent)}
ul{list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.center{text-align:center;margin-top:34px}
.mt{margin-top:34px}
/* topbar */
.topbar{background:var(--navy);color:#cfe0f0;font-size:.82rem}
.topbar-inner{display:flex;justify-content:space-between;gap:16px;padding:8px 0;flex-wrap:wrap}
/* navbar */
.navbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);box-shadow:0 2px 10px rgba(11,31,51,.05)}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:10px 20px}
.brand img{height:52px;width:auto}
.menu{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.menu a{display:block;padding:10px 16px;font-family:'Kanit',sans-serif;font-weight:500;color:var(--navy);border-radius:8px}
.menu a:hover{background:var(--sky);color:var(--blue)}
.menu a.active{color:var(--blue);background:var(--sky)}
.nav-cta{background:var(--accent);color:#fff !important;border-radius:8px}
.nav-cta:hover{background:#e07510}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:26px;height:3px;background:var(--navy);margin:5px 0;border-radius:2px;transition:.25s}
/* buttons */
.btn{display:inline-block;padding:12px 26px;border-radius:10px;font-family:'Kanit',sans-serif;font-weight:600;font-size:.98rem;border:2px solid transparent;cursor:pointer;transition:.2s}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#e07510;color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-outline{border-color:var(--blue);color:var(--blue)}
.btn-outline:hover{background:var(--blue);color:#fff}
.btn-ghost{border-color:rgba(255,255,255,.85);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff}
.btn-lg{padding:15px 34px;font-size:1.05rem}
.btn-block{width:100%;text-align:center}
/* hero */
.hero{position:relative;min-height:520px;display:flex;align-items:center;background:var(--navy);overflow:hidden}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.55}
.hero-overlay{position:relative;width:100%;background:linear-gradient(90deg,rgba(8,22,38,.88) 0%,rgba(8,22,38,.62) 55%,rgba(8,22,38,.25) 100%);padding:90px 0}
.hero h1{color:#fff;font-size:clamp(1.8rem,4vw,3rem);max-width:820px;font-weight:700;text-shadow:0 2px 12px rgba(0,0,0,.35)}
.hero p{color:#dbe8f5;max-width:720px;margin:18px 0 30px;font-size:1.1rem}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
/* stats */
.stats{background:var(--navy);color:#fff;padding:34px 0;border-top:3px solid var(--accent)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;text-align:center}
.stats strong{display:block;font-family:'Kanit',sans-serif;font-size:1.9rem;color:var(--accent2);font-weight:700}
.stats span{color:#c4d6e8;font-size:.92rem}
/* sections */
.section{padding:76px 0}
.section-alt{background:var(--sky)}
.section-head{text-align:center;max-width:780px;margin:0 auto 44px}
.section-head h2{font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:12px;position:relative;display:inline-block}
.section-head h2::after{content:"";display:block;width:64px;height:4px;border-radius:2px;background:var(--accent);margin:12px auto 0}
.section-head p{color:var(--muted)}
/* grid & cards */
.grid{display:grid;gap:24px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.products-grid{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:.25s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.card-img{display:block;overflow:hidden;background:#f3f7fa}
.card-img img{width:100%;aspect-ratio:1/1;object-fit:cover;transition:.4s}
.card:hover .card-img img{transform:scale(1.05)}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-body h3{font-size:1.06rem}
.card-en{color:var(--muted);font-size:.85rem;font-style:italic}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:4px 0}
.chip{background:var(--sky);color:var(--blue);font-size:.78rem;font-weight:600;padding:4px 12px;border-radius:999px;font-family:'Kanit',sans-serif}
.chip-alt{background:#fdf0e0;color:#b25f0a}
.card-link{margin-top:auto;font-family:'Kanit',sans-serif;font-weight:600;font-size:.92rem}
/* why cards */
.why-card{background:#fff;border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow-sm);border-top:4px solid var(--accent);transition:.25s}
.why-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.why-icon{font-size:2rem;margin-bottom:12px}
.why-card h3{font-size:1.12rem;margin-bottom:8px}
.why-card p{color:var(--muted);font-size:.94rem}
/* applications */
.app-card{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);background:#fff}
.app-card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.app-card figcaption{padding:16px 18px}
.app-card strong{font-family:'Kanit',sans-serif;color:var(--navy);display:block;margin-bottom:4px}
.app-card span{color:var(--muted);font-size:.88rem}
/* about split */
.about-split{display:grid;grid-template-columns:1fr 1.15fr;gap:48px;align-items:center}
.about-split img{border-radius:var(--radius);box-shadow:var(--shadow)}
.about-split h2{margin-bottom:16px;font-size:1.7rem}
.about-split p{margin-bottom:14px;color:var(--muted)}
/* cta band */
.cta-band{background:linear-gradient(120deg,var(--navy),var(--blue));color:#fff;padding:58px 0}
.cta-band-inner{display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:1.5rem;margin-bottom:6px}
.cta-band p{color:#cfe0f0}
/* page hero */
.page-hero{background:linear-gradient(120deg,var(--navy),var(--navy2));color:#fff;padding:64px 0;text-align:center}
.page-hero h1{color:#fff;font-size:clamp(1.6rem,3.4vw,2.4rem)}
.page-hero p{color:#c4d6e8;max-width:720px;margin:10px auto 0}
/* breadcrumb */
.breadcrumb{padding:18px 0 0;font-size:.86rem}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:6px;color:var(--muted)}
.breadcrumb li+li::before{content:"›";margin-right:6px;color:#9fb2c4}
/* detail */
.detail-wrap{padding-bottom:56px}
.detail-top{display:grid;grid-template-columns:440px 1fr;gap:44px;margin-top:22px;align-items:start}
.detail-img{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);background:#f3f7fa}
.detail-img img{width:100%;aspect-ratio:1/1;object-fit:cover}
.detail-img figcaption{text-align:center;padding:10px;color:var(--muted);font-size:.84rem;font-style:italic}
.detail-info h1{font-size:clamp(1.5rem,2.6vw,2.1rem);margin-bottom:6px}
.detail-en{color:var(--muted);font-style:italic;margin-bottom:14px}
.detail-info>p{color:var(--text);margin:14px 0 20px}
.detail-actions{display:flex;gap:12px;flex-wrap:wrap}
.detail-cols{display:grid;grid-template-columns:1.2fr 1fr;gap:48px}
.detail-cols h2{font-size:1.35rem;margin-bottom:18px;padding-left:14px;border-left:4px solid var(--accent)}
.detail-cols p{color:var(--text);margin-bottom:12px}
.feature-list{list-style:none}
.feature-list li{position:relative;padding:0 0 14px 30px;color:var(--text)}
.feature-list li::before{content:"✔";position:absolute;left:0;top:0;color:var(--accent);font-weight:700}
.note{background:#fdf6ec;border-left:4px solid var(--accent);padding:14px 18px;border-radius:8px;color:#7a4a10;font-size:.92rem}
.spec-table{width:100%;border-collapse:collapse;font-size:.94rem}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top}
.spec-table th{background:var(--sky);color:var(--navy);width:34%;font-family:'Kanit',sans-serif;font-weight:500}
.mini-cta{margin-top:30px;background:var(--navy);color:#dbe8f5;border-radius:var(--radius);padding:24px 26px}
.mini-cta p{color:#dbe8f5 !important;margin-bottom:14px}
/* products page */
.pill-nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:46px}
.pill{background:var(--sky);color:var(--blue);padding:9px 22px;border-radius:999px;font-family:'Kanit',sans-serif;font-weight:500;font-size:.92rem}
.pill:hover{background:var(--blue);color:#fff}
.products-section{margin-bottom:56px}
.products-section .section-head{margin-bottom:30px}
.products-section .section-head h2::after{margin:10px 0 0}
/* faq */
.faq-wrap{max-width:860px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow-sm)}
.faq-item summary{cursor:pointer;padding:18px 24px;font-family:'Kanit',sans-serif;font-weight:500;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:.2s}
.faq-item[open] summary::after{content:"–"}
.faq-item[open]{border-color:var(--blue)}
.faq-a{padding:0 24px 20px;color:var(--muted);border-top:1px dashed var(--line);padding-top:16px;margin:0 0}
.faq-cta{margin-top:40px}
.faq-cta p{margin-bottom:12px;color:var(--muted)}
/* about page */
.value-card{background:#fff;border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow-sm);text-align:center}
.value-card h3{font-size:1.05rem;margin-bottom:8px}
.value-card p{color:var(--muted);font-size:.92rem}
.split-cols{display:grid;grid-template-columns:1fr 1fr;gap:52px}
.col-title{font-size:1.4rem;margin-bottom:20px;padding-left:14px;border-left:4px solid var(--accent)}
.philosophy li{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:12px;box-shadow:var(--shadow-sm)}
.philosophy strong{font-family:'Kanit',sans-serif;color:var(--blue)}
.philosophy span{color:var(--muted);font-size:.94rem}
.culture-grid{display:grid;gap:14px}
.culture-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 20px;box-shadow:var(--shadow-sm)}
.culture-item h3{font-size:1rem;margin-bottom:4px;color:var(--blue)}
.culture-item p{color:var(--muted);font-size:.94rem}
/* contact */
.contact-wrap{display:grid;grid-template-columns:1fr 1.3fr;gap:52px;align-items:start}
.contact-info h2{margin-bottom:14px}
.contact-info p{color:var(--muted);margin-bottom:14px}
.contact-points li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:12px;box-shadow:var(--shadow-sm);font-size:.95rem}
.contact-points strong{color:var(--blue)}
.contact-note{font-size:.9rem}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 34px 28px;box-shadow:var(--shadow)}
.contact-form h2{margin-bottom:22px}
.form-row{margin-bottom:18px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.contact-form label{display:block;font-family:'Kanit',sans-serif;font-weight:500;font-size:.92rem;margin-bottom:6px;color:var(--navy)}
.contact-form input,.contact-form select,.contact-form textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;font:inherit;color:var(--text);background:#fbfdff;transition:.2s}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{outline:none;border-color:var(--blue);background:#fff;box-shadow:0 0 0 3px rgba(14,90,167,.12)}
.form-privacy{font-size:.82rem;color:var(--muted);margin-top:14px;text-align:center}
/* footer */
.site-footer{background:var(--navy);color:#b9cadb;padding:64px 0 0;font-size:.94rem}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1.2fr 1.4fr;gap:40px;padding-bottom:44px}
.footer-grid h3{color:#fff;font-size:1.08rem;margin-bottom:16px}
.footer-grid p{margin-bottom:10px}
.footer-name{font-family:'Kanit',sans-serif;color:#fff}
.footer-grid ul li{margin-bottom:9px}
.footer-grid a{color:#b9cadb}
.footer-grid a:hover{color:var(--accent2)}
.footer-link{font-family:'Kanit',sans-serif;font-weight:600;color:var(--accent2) !important}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;text-align:center;font-size:.84rem;color:#8fa6bd}
/* status page */
.status-wrap{max-width:640px;margin:0 auto;padding:90px 20px;text-align:center}
.status-ok{background:#eaf7ef;border:1px solid #bfe6cd;color:#1d7a3f;border-radius:14px;padding:34px 28px;margin-bottom:24px}
.status-err{background:#fdeeee;border:1px solid #f2c4c4;color:#a33030;border-radius:14px;padding:34px 28px;margin-bottom:24px}
.status-wrap h1{margin-bottom:12px}
.status-wrap p{color:var(--muted);margin-bottom:10px}
/* responsive */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .products-grid{grid-template-columns:repeat(2,1fr)}
  .detail-top{grid-template-columns:1fr;gap:28px}
  .detail-img{max-width:480px;margin:0 auto}
  .detail-cols,.split-cols,.contact-wrap,.about-split{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .section{padding:54px 0}
  .nav-toggle{display:block}
  .navbar nav{position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);display:none;padding:10px 20px 20px}
  body.nav-open .navbar nav{display:block}
  .menu{flex-direction:column;align-items:stretch}
  .menu a{text-align:center}
  .products-grid,.grid-4,.form-grid{grid-template-columns:1fr}
  .hero-overlay{padding:64px 0}
  .hero{min-height:440px}
  .cta-band-inner{flex-direction:column;text-align:center}
  .footer-grid{grid-template-columns:1fr}
  .topbar-inner{justify-content:center;text-align:center}
}