:root{
  --bg:#f7f9fc; --card:#ffffff; --ink:#16213a; --muted:#64748b;
  --brand:#16a34a; --brand2:#eab308; --dark:#0f172a; --accent:#facc15;
  --radius:16px; --shadow:0 10px 30px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Prompt","Noto Sans Thai",system-ui,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}
.container{max-width:1120px;margin:0 auto;padding:0 20px}
.topbar{background:var(--dark);color:#cbd5e1;font-size:12.5px;text-align:center;padding:7px 12px;letter-spacing:.2px}
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid #e2e8f0}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:12px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800}
.logo-mark{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;width:40px;height:40px;display:grid;place-items:center;border-radius:12px;font-weight:800}
.logo-text small{display:block;font-size:11px;color:var(--brand);letter-spacing:2px;line-height:1}
.nav-links{display:flex;gap:18px}
.nav-links a{text-decoration:none;color:#334155;font-weight:500;font-size:15px}
.nav-links a.active,.nav-links a:hover{color:var(--brand)}
.nav-links a.active{color:var(--brand);font-weight:700}
.nav-cta{display:flex;align-items:center;gap:10px}
.btn{display:inline-block;border:0;cursor:pointer;text-decoration:none;font-weight:600;border-radius:12px;padding:12px 20px;font-family:inherit;font-size:15px;transition:.2s}
.btn-primary{background:linear-gradient(135deg,#16a34a,#059669);color:#fff;box-shadow:0 8px 20px rgba(22,163,74,.3)}
.btn-primary:hover{transform:translateY(-1px)}
.btn-ghost{background:#fff;border:1.5px solid #e2e8f0;color:var(--ink)}
.btn-sm{padding:9px 14px;font-size:14px}
.full-btn{width:100%}
.hamburger{display:none;background:#0f172a;color:#fff;border:0;border-radius:10px;width:42px;height:42px;font-size:20px}

/* Hero */
.hero{background:radial-gradient(900px 400px at 80% -5%,#dcfce7,transparent),radial-gradient(700px 380px at 5% 10%,#fef9c3,transparent),linear-gradient(180deg,#fff, #f7f9fc);padding:36px 0 22px;border-bottom:1px solid #eef2f7}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center}
.badge{display:inline-block;background:#dcfce7;color:#15803d;font-weight:700;font-size:13px;padding:6px 12px;border-radius:999px}
.hero h1{font-size:clamp(38px,6vw,62px);line-height:1.1;margin:14px 0}
.hl{background:linear-gradient(135deg,#16a34a,#eab308);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:#475569;font-size:17px;max-width:520px}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}
.hero-stats{display:flex;gap:28px;margin-top:10px}
.hero-stats strong{display:block;font-size:26px}
.hero-stats span{color:var(--muted);font-size:13px}
.hero-visual{position:relative;min-height:340px}
.hero-card{background:#fff;border:1px solid #e2e8f0;border-radius:18px;box-shadow:var(--shadow);padding:18px}
.main-card{max-width:340px;margin-left:auto}
.pulse-dot{width:12px;height:12px;background:#22c55e;border-radius:50%;box-shadow:0 0 0 8px #dcfce7;margin-bottom:8px;animation:pulse 1.6s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 14px #f0fdf4}}
.hr-big{font-size:52px;font-weight:800}.hr-big small{font-size:16px;color:var(--muted);margin-left:6px}
.zone-bar{display:flex;gap:6px;margin:12px 0}.zone-bar i{height:10px;flex:1;border-radius:99px;background:#e2e8f0}.zone-bar .z1{background:#bbf7d0}.zone-bar .z2{background:#86efac}.zone-bar .z3.on{background:#16a34a;box-shadow:0 0 0 4px #dcfce7}.zone-bar .z4{background:#fde047}.zone-bar .z5{background:#ca8a04}
.mini-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mini{background:#f8fafc;border-radius:12px;padding:10px}.mini b{display:block;font-size:13px}.mini span{font-size:13px;color:var(--muted)}
.float{position:absolute;font-weight:600;font-size:14px}
.f1{left:0;top:20px;transform:rotate(-4deg)}
.f2{left:10px;bottom:10px;transform:rotate(3deg)}
.quick-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.quick-links a{background:#0f172a;color:#fff;text-decoration:none;font-size:14px;padding:9px 14px;border-radius:999px}
.quick-links a:hover{background:#16a34a}

/* Sections */
.section{padding:56px 0}
.section.alt{background:#fff;border-top:1px solid #eef2f7;border-bottom:1px solid #eef2f7}
.kicker{color:var(--brand);font-weight:700;letter-spacing:1px;text-transform:uppercase;font-size:13px;margin:0}
.section h2{font-size:clamp(26px,4vw,36px);margin:6px 0 8px}
.section-desc{color:var(--muted);max-width:720px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:22px}
.card{background:var(--card);border:1px solid #e8eef5;border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.card .icon{font-size:30px}
.card h3{margin:10px 0 6px;font-size:19px}
.card h3 small{display:block;font-weight:400;color:var(--muted);font-size:13px}
.card p{color:#475569;font-size:15px}
.muted{color:var(--muted);font-size:14px}
.pill-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.pill-row span{background:#f1f5f9;border-radius:999px;padding:4px 10px;font-size:12.5px}
code{background:#0f172a;color:#e2e8f0;padding:4px 8px;border-radius:8px;font-size:12.5px}

/* Branches */
.branch-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:22px}
.branch-grid .branch:last-child{grid-column:1/-1}
.branch{background:#fff;border:1px solid #e8eef5;border-radius:18px;padding:22px;box-shadow:var(--shadow)}
.branch-top{display:flex;justify-content:flex-start;align-items:center;gap:10px;font-size:19px;font-weight:700;border-radius:12px;padding:12px 16px;margin-bottom:8px;color:#fff;line-height:1.4}
.b1{background:linear-gradient(135deg,#16a34a,#65a30d)}.b2{background:linear-gradient(135deg,#eab308,#ca8a04)}.b3{background:linear-gradient(135deg,#15803d,#16a34a)}.b4{background:linear-gradient(135deg,#fde047,#eab308)}.b5{background:linear-gradient(135deg,#065f46,#16a34a)}
.branch h3{margin:0 0 6px;font-size:14px;font-weight:500;color:var(--muted)}
.branch ul{margin:10px 0;padding-left:20px;color:#334155;font-size:14.5px}
.tag-btn{background:#f1f5f9;border:0;border-radius:10px;padding:9px 12px;cursor:pointer;font-family:inherit;font-weight:600;color:#15803d}
.tag-btn:hover{background:#dcfce7}

/* Articles */
.search-row{display:flex;gap:10px;margin:18px 0 12px;flex-wrap:wrap}
.search-row input{flex:1;min-width:220px;padding:12px 14px;border-radius:12px;border:1.5px solid #e2e8f0;font-family:inherit;font-size:15px}
.search-row select{padding:12px;border-radius:12px;border:1.5px solid #e2e8f0;font-family:inherit}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.tag{border:1.5px solid #e2e8f0;background:#fff;border-radius:999px;padding:7px 14px;cursor:pointer;font-family:inherit;font-size:14px}
.tag.active{background:#0f172a;color:#fff;border-color:#0f172a}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.article{background:#fff;border:1px solid #e8eef5;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.article-cover{font-size:34px;padding:18px 18px 0}
.article-body{padding:6px 18px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.article-body h3{margin:0;font-size:16.5px;line-height:1.5}
.article-body p{margin:0;color:#64748b;font-size:13.5px;flex:1}
.article-meta{display:flex;gap:8px;align-items:center;font-size:12px}.article-meta em{background:#f1f5f9;padding:3px 9px;border-radius:999px;font-style:normal;font-weight:600}

/* Tools */
.tools-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:22px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0}
.form-grid .full{grid-column:1/-1}
label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:600}
input,select,textarea{padding:11px 12px;border-radius:10px;border:1.5px solid #e2e8f0;font-family:inherit;font-size:15px;width:100%}
input:focus,select:focus,textarea:focus{outline:2px solid #16a34a33;border-color:#16a34a}
.result{background:#0f172a;color:#fff;border-radius:12px;padding:14px;margin-top:12px;font-size:15px;line-height:1.7}
.result b{color:var(--accent)}
.zones{margin-top:12px;display:grid;gap:8px}
.zone{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;background:#f8fafc;border-radius:10px;padding:8px 12px;font-size:13.5px}
.zone .bar{height:8px;background:#e2e8f0;border-radius:99px;overflow:hidden}.zone .bar i{display:block;height:100%}
.tip{background:#fffbeb;border:1px solid #fde047;border-radius:10px;padding:10px 12px;font-size:13px;margin-top:12px}

/* About */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.team{list-style:none;padding:0;display:grid;gap:10px;margin-top:14px}
.team li{background:#fff;border:1px solid #e8eef5;border-radius:12px;padding:12px 14px;box-shadow:var(--shadow)}
#contactForm{display:grid;gap:12px;margin-top:12px}

/* Footer */
footer{background:var(--dark);color:#cbd5e1;margin-top:0}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:18px;padding:30px 20px}
footer a{color:#e2e8f0;text-decoration:none;font-size:14px}
.copy{text-align:center;border-top:1px solid #1e293b;padding:14px;font-size:13px;color:#94a3b8}
#toTop{position:fixed;right:18px;bottom:18px;width:46px;height:46px;border-radius:50%;border:0;background:#16a34a;color:#fff;font-size:20px;cursor:pointer;box-shadow:0 10px 24px rgba(0,0,0,.25);display:none}
#toTop.show{display:block}

/* Responsive */
@media(max-width:900px){
  .hero-grid,.grid3,.tools-grid,.about-grid{grid-template-columns:1fr}
  .branch-grid,.article-grid{grid-template-columns:1fr}
  .hero-visual{min-height:0}
  .main-card{margin:0 auto}
  .float{position:static;transform:none;margin-top:10px}
  .nav-links{position:fixed;top:64px;right:0;left:0;background:#fff;flex-direction:column;padding:16px 20px;border-bottom:1px solid #e2e8f0;display:none}
  .nav-links.open{display:flex}
  .hamburger{display:block}
  .foot-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
}