:root{
  --g900:#1c1f23;--g800:#2a2e33;--g700:#3d4248;--g600:#5a6068;--g500:#7b828b;
  --g300:#c9cdd2;--g200:#e1e4e7;--g100:#eff1f3;--g50:#f7f8f9;--white:#fff;
  --accent:#9aa3ad;--radius:14px;--shadow:0 10px 30px rgba(28,31,35,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Prompt','Noto Sans Thai',sans-serif;background:var(--g50);color:var(--g800);line-height:1.75;font-weight:300}
img{max-width:100%;display:block;background:var(--g200)}
a{color:inherit;text-decoration:none}
.container{width:min(1160px,100% - 32px);margin-inline:auto}
h1,h2,h3{color:var(--g900);font-weight:600;line-height:1.35}
h2{font-size:clamp(1.6rem,3vw,2.2rem)}
.eyebrow{display:inline-block;font-size:.85rem;letter-spacing:.15em;text-transform:uppercase;color:var(--g500);font-weight:500;margin-bottom:.6rem}
.lead{color:var(--g600);font-size:1.05rem}

/* Header */
header{position:sticky;top:0;z-index:50;background:rgba(42,46,51,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--g700)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:.7rem;color:var(--white);font-weight:600;font-size:1.1rem}
.logo-mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--g300),var(--g600));display:grid;place-items:center;color:var(--g900);font-weight:700}
.logo small{display:block;font-size:.7rem;font-weight:300;color:var(--g300);letter-spacing:.08em}
.menu{display:flex;gap:.3rem;list-style:none}
.menu a{color:var(--g200);padding:.5rem 1rem;border-radius:8px;font-size:.95rem;transition:.2s}
.menu a:hover,.menu a.active{background:var(--g700);color:var(--white)}
.burger{display:none;background:none;border:0;color:var(--white);font-size:1.6rem;cursor:pointer}

/* Hero */
.hero{position:relative;min-height:78vh;display:flex;align-items:center;color:var(--white);overflow:hidden}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:grayscale(70%)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(28,31,35,.92) 30%,rgba(28,31,35,.45))}
.hero .container{position:relative;z-index:1;padding:5rem 0}
.hero h1{color:var(--white);font-size:clamp(2rem,5vw,3.4rem);max-width:760px}
.hero p{color:var(--g200);max-width:620px;margin:1.2rem 0 2rem;font-size:1.1rem}
.page-hero{min-height:44vh}
.btn{display:inline-block;padding:.85rem 1.8rem;border-radius:999px;font-weight:500;transition:.2s}
.btn-light{background:var(--white);color:var(--g900)}
.btn-light:hover{background:var(--g200)}
.btn-outline{border:1px solid var(--g300);color:var(--white);margin-left:.6rem}
.btn-outline:hover{background:rgba(255,255,255,.1)}
.btn-dark{background:var(--g800);color:var(--white)}
.btn-dark:hover{background:var(--g900)}

/* Sections */
section{padding:5.5rem 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 3rem}
.section-head p{margin-top:.8rem}
.bg-white{background:var(--white)}
.bg-dark{background:var(--g800);color:var(--g200)}
.bg-dark h2,.bg-dark h3{color:var(--white)}

.grid{display:grid;gap:1.6rem}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--g200);transition:.25s}
.card:hover{transform:translateY(-4px)}
.card img{width:100%;aspect-ratio:16/10;object-fit:cover;filter:grayscale(35%)}
.card-body{padding:1.5rem}
.card-body h3{font-size:1.2rem;margin-bottom:.5rem}
.card-body p{color:var(--g600);font-size:.95rem}

.split{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem;align-items:center}
.split img{border-radius:var(--radius);aspect-ratio:4/3;object-fit:cover;box-shadow:var(--shadow);filter:grayscale(30%)}
.split p{margin-top:1rem;color:var(--g600)}
.checklist{list-style:none;margin-top:1.4rem}
.checklist li{padding:.45rem 0 .45rem 2rem;position:relative}
.checklist li::before{content:"✓";position:absolute;left:0;top:.45rem;width:1.4rem;height:1.4rem;border-radius:50%;background:var(--g700);color:var(--white);font-size:.8rem;display:grid;place-items:center}

.feature{padding:2rem;border-radius:var(--radius);background:var(--g700);border:1px solid var(--g600)}
.feature .num{font-size:2.4rem;font-weight:600;color:var(--g300)}
.feature h3{margin:.4rem 0}
.feature p{color:var(--g300);font-size:.95rem}

.steps{counter-reset:s}
.step{background:var(--white);padding:1.8rem;border-radius:var(--radius);border:1px solid var(--g200);position:relative}
.step::before{counter-increment:s;content:"0" counter(s);font-size:2rem;font-weight:700;color:var(--g300)}
.step h3{font-size:1.1rem;margin:.3rem 0}
.step p{color:var(--g600);font-size:.93rem}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;text-align:center}
.stat strong{display:block;font-size:2.4rem;color:var(--g900);font-weight:600}
.stat span{color:var(--g600)}

.cta{background:linear-gradient(120deg,var(--g700),var(--g900));color:var(--white);border-radius:20px;padding:3.5rem;display:flex;justify-content:space-between;align-items:center;gap:2rem;flex-wrap:wrap}
.cta h2{color:var(--white)}
.cta p{color:var(--g300);margin-top:.5rem}

/* Contact */
.contact-item{display:flex;gap:1rem;padding:1.4rem;background:var(--white);border-radius:var(--radius);border:1px solid var(--g200);margin-bottom:1rem}
.contact-item .ic{flex:0 0 48px;height:48px;border-radius:12px;background:var(--g800);color:var(--white);display:grid;place-items:center;font-size:1.3rem}
.contact-item h3{font-size:1rem}
.contact-item p,.contact-item a{color:var(--g600)}
.contact-item a:hover{color:var(--g900);text-decoration:underline}
form{background:var(--white);padding:2rem;border-radius:var(--radius);border:1px solid var(--g200);box-shadow:var(--shadow)}
label{display:block;font-weight:500;margin:.9rem 0 .35rem;font-size:.95rem}
input,textarea,select{width:100%;padding:.8rem 1rem;border:1px solid var(--g300);border-radius:10px;font:inherit;background:var(--g50)}
input:focus,textarea:focus,select:focus{outline:2px solid var(--g500);background:var(--white)}
textarea{min-height:140px;resize:vertical}
form .btn{border:0;cursor:pointer;margin-top:1.2rem;font-family:inherit;font-size:1rem}
.map{border:0;width:100%;height:380px;border-radius:var(--radius);filter:grayscale(100%)}

/* Policy */
.policy{background:var(--white);padding:3rem;border-radius:var(--radius);border:1px solid var(--g200);max-width:900px;margin:0 auto}
.policy h2{font-size:1.35rem;margin:2.2rem 0 .7rem;padding-left:.9rem;border-left:4px solid var(--g500)}
.policy h2:first-of-type{margin-top:0}
.policy p,.policy li{color:var(--g600)}
.policy ul{padding-left:1.4rem;margin:.5rem 0}
.policy .updated{font-size:.9rem;color:var(--g500);margin-bottom:2rem}

/* Footer */
footer{background:var(--g900);color:var(--g300);padding:4rem 0 0;font-size:.93rem}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:2.5rem}
footer h4{color:var(--white);font-weight:500;margin-bottom:1rem}
footer ul{list-style:none}
footer li{margin:.4rem 0}
footer a:hover{color:var(--white)}
.copy{border-top:1px solid var(--g700);margin-top:3rem;padding:1.4rem 0;text-align:center;color:var(--g500)}

.reveal{opacity:0;transform:translateY(24px);transition:.7s ease}
.reveal.show{opacity:1;transform:none}

@media(max-width:960px){
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .split,.foot{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:720px){
  .burger{display:block}
  .menu{display:none;position:absolute;top:72px;left:0;right:0;flex-direction:column;background:var(--g800);padding:1rem 16px}
  .menu.open{display:flex}
  .g2,.g3,.g4{grid-template-columns:1fr}
  section{padding:4rem 0}
  .policy,.cta{padding:2rem 1.4rem}
  .btn-outline{margin:.8rem 0 0}
}