:root{
  --bg:#0b1220;--surface:#111a2e;--card:#152037;--ink:#eef2ff;--muted:#a9b3cf;
  --gold:#d4a24c;--gold-2:#f0c675;--line:rgba(255,255,255,.08);
  --radius:14px;--max:1200px;
  --font: "Sarabun","Prompt",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.75;font-size:16px}
a{color:var(--gold-2);text-decoration:none}
a:hover{color:var(--gold)}
img{max-width:100%;display:block;border-radius:10px}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
h1,h2,h3,h4{font-family:"Prompt","Sarabun",sans-serif;line-height:1.3;color:#fff;margin:0 0 .6em}
h1{font-size:clamp(2rem,4vw,3.2rem);letter-spacing:.5px}
h2{font-size:clamp(1.6rem,2.6vw,2.2rem);margin-top:1.4em}
h3{font-size:1.25rem;color:var(--gold-2)}
p{margin:0 0 1em;color:#d7ddee}
.muted{color:var(--muted)}

/* Nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(11,18,32,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:var(--max);margin:0 auto}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:#fff;font-size:1.15rem;letter-spacing:1px}
.brand img{width:36px;height:36px;border-radius:0;background:transparent}
.nav ul{display:flex;gap:22px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.nav a{color:#d7ddee;font-size:.95rem}
.nav a.active,.nav a:hover{color:var(--gold-2)}
.burger{display:none;background:none;border:0;color:#fff;font-size:24px;cursor:pointer}
@media(max-width:820px){
  .nav ul{display:none;flex-basis:100%;flex-direction:column;padding:12px 0}
  .nav ul.open{display:flex}
  .burger{display:block}
  .nav-inner{flex-wrap:wrap}
}

/* Hero */
.hero{position:relative;min-height:72vh;display:flex;align-items:center;color:#fff;
  background:linear-gradient(180deg,rgba(11,18,32,.55),rgba(11,18,32,.9)),url('../images/hero-1.jpg') center/cover no-repeat}
.hero .container{padding:80px 20px}
.hero h1{max-width:800px}
.hero p.lead{font-size:1.15rem;max-width:680px;color:#e6ebfb}
.cta{display:inline-flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.btn{display:inline-block;padding:13px 22px;border-radius:999px;background:var(--gold);color:#1a1206;font-weight:700;border:0;cursor:pointer;transition:.2s}
.btn:hover{background:var(--gold-2);color:#1a1206}
.btn.ghost{background:transparent;border:1px solid var(--gold);color:var(--gold-2)}
.btn.ghost:hover{background:rgba(212,162,76,.1)}

/* Sections */
section{padding:70px 0}
.section-title{text-align:center;margin-bottom:36px}
.section-title p{max-width:680px;margin:0 auto;color:var(--muted)}
.grid{display:grid;gap:22px}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
@media(max-width:900px){.grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.card:hover{transform:translateY(-4px);border-color:rgba(212,162,76,.4)}
.card .body{padding:20px}
.card h3{margin-top:0}
.badge{display:inline-block;padding:4px 10px;border-radius:999px;background:rgba(212,162,76,.15);color:var(--gold-2);font-size:.8rem;margin-bottom:10px}

/* Feature */
.feature{display:grid;grid-template-columns:1.1fr 1fr;gap:40px;align-items:center}
.feature.reverse{grid-template-columns:1fr 1.1fr}
.feature.reverse .txt{order:2}
@media(max-width:820px){.feature,.feature.reverse{grid-template-columns:1fr}.feature.reverse .txt{order:0}}

/* Gallery */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.gallery img{height:180px;object-fit:cover;width:100%}
@media(max-width:820px){.gallery{grid-template-columns:repeat(2,1fr)}}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stats .num{font-family:"Prompt",sans-serif;font-size:2.4rem;color:var(--gold-2);font-weight:700}
@media(max-width:700px){.stats{grid-template-columns:repeat(2,1fr)}}

/* Steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.steps .step{background:var(--card);padding:24px;border-radius:var(--radius);border:1px solid var(--line);position:relative}
.steps .step::before{counter-increment:s;content:counter(s);position:absolute;top:-18px;left:20px;background:var(--gold);color:#1a1206;font-weight:800;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center}
@media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}

/* FAQ */
details{background:var(--card);padding:16px 20px;border-radius:12px;margin-bottom:10px;border:1px solid var(--line)}
details summary{cursor:pointer;font-weight:600;color:#fff;list-style:none}
details[open] summary{color:var(--gold-2)}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
@media(max-width:820px){.contact-grid{grid-template-columns:1fr}}
.info li{margin-bottom:12px;color:#d7ddee;list-style:none}
.info ul{padding:0}
form input,form textarea,form select{width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:#0e1728;color:#fff;font-family:inherit;margin-bottom:12px;font-size:1rem}
form label{display:block;margin-bottom:6px;color:var(--muted);font-size:.9rem}

/* Article */
article.post{background:var(--card);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
article.post img{border-radius:0;height:200px;object-fit:cover;width:100%}
article.post .body{padding:20px}
.meta{color:var(--muted);font-size:.85rem;margin-bottom:8px}

/* Footer */
footer{background:#070c17;border-top:1px solid var(--line);padding:50px 0 20px;margin-top:40px;color:var(--muted)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}
footer h4{color:#fff;font-size:1rem;margin-bottom:14px}
footer a{color:#c0c8e0}
footer ul{padding:0;list-style:none}
footer ul li{margin-bottom:8px}
.copy{border-top:1px solid var(--line);padding-top:18px;text-align:center;font-size:.85rem}

/* toc */
.toc{background:var(--card);padding:20px 26px;border-radius:12px;border:1px solid var(--line);margin:20px 0}
.toc ol{margin:0;padding-left:20px}
.toc a{color:#e6ebfb}

.section-alt{background:var(--surface)}