:root{
  --bg:#f3f4f6; --surface:#ffffff; --line:#d9dce1;
  --ink:#1f2328; --muted:#5b6470;
  --gray-900:#20242a; --gray-800:#2b3037; --gray-700:#3a414a; --gray-500:#6b7380; --gray-200:#e4e6ea;
  --accent:#4b5563;
  --radius:14px; --max:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans Thai','Sarabun',system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(32,36,42,.96);backdrop-filter:blur(6px);color:#fff}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;letter-spacing:.2px}
.brand .mark{width:36px;height:36px;border-radius:9px;background:#e4e6ea;color:var(--gray-900);display:grid;place-items:center;font-weight:800;font-size:.9rem}
.menu{display:flex;gap:6px;list-style:none}
.menu a{display:block;padding:8px 14px;border-radius:8px;color:#cfd3d9;font-size:.95rem;transition:.2s}
.menu a:hover,.menu a.active{background:var(--gray-700);color:#fff}
.burger{display:none;background:none;border:0;color:#fff;font-size:1.7rem;cursor:pointer}

/* Hero */
.hero{position:relative;color:#fff;background:var(--gray-800);overflow:hidden}
.hero img.bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.38;filter:grayscale(1)}
.hero .wrap{position:relative;padding:110px 20px 120px}
.eyebrow{display:inline-block;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;color:#c3c8d0;border:1px solid #5a626d;padding:4px 12px;border-radius:99px;margin-bottom:18px}
.hero h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.25;font-weight:700;max-width:760px}
.hero p{margin-top:18px;max-width:620px;color:#d7dbe0;font-size:1.08rem}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.btn{display:inline-block;padding:12px 26px;border-radius:10px;font-weight:600;font-size:.97rem;transition:.2s;border:1px solid transparent;cursor:pointer;font-family:inherit}
.btn-light{background:#e9ebee;color:var(--gray-900)}
.btn-light:hover{background:#fff}
.btn-ghost{border-color:#7b838f;color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-dark{background:var(--gray-800);color:#fff}
.btn-dark:hover{background:var(--gray-900)}

.page-hero{background:var(--gray-800);color:#fff;padding:64px 0}
.page-hero h1{font-size:clamp(1.8rem,4vw,2.6rem)}
.page-hero p{color:#c9ced5;margin-top:8px;max-width:640px}

/* Sections */
section{padding:76px 0}
.alt{background:#e9ebee}
.sec-head{max-width:640px;margin-bottom:42px}
.sec-head .tag{font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gray-500);font-weight:600}
.sec-head h2{font-size:clamp(1.55rem,3vw,2.15rem);line-height:1.35;margin-top:6px}
.sec-head p{color:var(--muted);margin-top:10px}

.grid{display:grid;gap:24px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 30px -14px rgba(32,36,42,.35)}
.card .pic{aspect-ratio:16/10;background:linear-gradient(135deg,#c9ced5,#9aa1ac);overflow:hidden}
.card .pic img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05);transition:.4s}
.card:hover .pic img{transform:scale(1.05)}
.card .body{padding:22px}
.card h3{font-size:1.15rem;margin-bottom:6px}
.card p{color:var(--muted);font-size:.95rem}
.card ul{margin:12px 0 0 18px;color:var(--muted);font-size:.93rem}

.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split .photo{border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3;background:linear-gradient(135deg,#c9ced5,#9aa1ac)}
.split .photo img{width:100%;height:100%;object-fit:cover;filter:grayscale(1)}
.split h2{font-size:clamp(1.5rem,3vw,2rem);line-height:1.35;margin-bottom:12px}
.split p{color:var(--muted);margin-bottom:12px}
.checks{list-style:none;margin-top:14px}
.checks li{padding-left:28px;position:relative;margin-bottom:8px}
.checks li::before{content:"✓";position:absolute;left:0;top:0;width:20px;height:20px;border-radius:50%;background:var(--gray-800);color:#fff;font-size:.72rem;display:grid;place-items:center;margin-top:5px}

.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center}
.stat b{display:block;font-size:2rem;color:var(--gray-800)}
.stat span{color:var(--muted);font-size:.93rem}

.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.step .n{width:38px;height:38px;border-radius:10px;background:var(--gray-800);color:#fff;display:grid;place-items:center;font-weight:700;margin-bottom:12px}
.step h3{font-size:1.05rem;margin-bottom:4px}
.step p{color:var(--muted);font-size:.93rem}

.cta{background:var(--gray-800);color:#fff;border-radius:18px;padding:48px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.cta h2{font-size:1.6rem}
.cta p{color:#c9ced5;margin-top:4px}

/* Contact */
.info{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.info h3{font-size:1rem;color:var(--gray-500);font-weight:600;margin-bottom:4px}
.info p,.info a{font-size:1.05rem;font-weight:500;word-break:break-word}
.info a:hover{text-decoration:underline}
form.box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
label{display:block;font-weight:600;font-size:.92rem;margin:14px 0 6px}
input,textarea{width:100%;padding:12px 14px;border:1px solid #c7ccd3;border-radius:10px;font:inherit;background:#fafafa}
input:focus,textarea:focus{outline:2px solid var(--gray-500);border-color:transparent}
textarea{min-height:130px;resize:vertical}
.map{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);margin-top:24px}
.map iframe{width:100%;height:340px;border:0;filter:grayscale(1)}

/* Policy */
.policy{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:40px;max-width:860px;margin:0 auto}
.policy h2{font-size:1.2rem;margin:28px 0 8px}
.policy h2:first-child{margin-top:0}
.policy p,.policy li{color:#434a54}
.policy ul{margin:8px 0 0 22px}

/* Footer */
footer{background:var(--gray-900);color:#b4bac3;padding:56px 0 24px}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:36px}
footer h4{color:#fff;margin-bottom:12px;font-size:1rem}
footer a:hover{color:#fff}
footer ul{list-style:none}
footer li{margin-bottom:6px;font-size:.93rem}
.copy{border-top:1px solid #3a414a;margin-top:36px;padding-top:20px;text-align:center;font-size:.88rem}

@media(max-width:900px){
  .g3,.g4{grid-template-columns:repeat(2,1fr)}
  .split,.foot{grid-template-columns:1fr}
  .split .photo{order:-1}
}
@media(max-width:680px){
  .burger{display:block}
  .menu{display:none;position:absolute;top:68px;left:0;right:0;background:var(--gray-900);flex-direction:column;padding:10px 20px 18px}
  .menu.open{display:flex}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .hero .wrap{padding:80px 20px 90px}
  section{padding:56px 0}
  .cta{padding:32px 24px}
  .policy{padding:26px}
}