:root{
  --navy:#0b1220; --navy2:#111c31; --navy3:#16233c;
  --sky:#38bdf8; --sky-d:#0ea5e9; --sky-l:#e5f3ff;
  --bg:#e5f3ff; --surface:#ffffff; --ink:#111827; --heading:#0b1220;
  --muted:#475569; --line:rgba(2,6,23,.12);
  --gold:#fbbf24; --green:#16a34a; --red:#ef4444;
  --radius:18px; --pill:50px; --max:1120px;
  --shadow:0 18px 40px rgba(2,6,23,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:'Sarabun','Noto Sans Thai',system-ui,-apple-system,'Segoe UI',Tahoma,sans-serif;
  font-size:17px;line-height:1.9;
}
img,svg{max-width:100%;height:auto}
a{color:var(--sky-d);text-decoration:none}
a:hover{color:var(--navy)}
h1,h2,h3,h4{color:var(--heading);line-height:1.45;margin:0 0 .6em}
h1{font-size:clamp(27px,4.4vw,44px);font-weight:800;line-height:1.35}
h2{font-size:clamp(21px,2.7vw,30px);font-weight:800}
h3{font-size:clamp(18px,2.1vw,22px);font-weight:700}
p{margin:0 0 1.05em}
ul,ol{margin:0 0 1.1em;padding-left:1.35em}
li{margin:.35em 0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 18px}
.narrow{max-width:960px;margin:0 auto;padding:0 18px}
main{display:block}
section{padding:44px 0}
.sec-alt{background:#fff}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--pill);padding:13px 26px;font-weight:700;font-size:16px;
  border:2px solid transparent;cursor:pointer;text-align:center;transition:.15s;line-height:1.3}
.btn-p{background:linear-gradient(135deg,var(--sky),var(--sky-d));color:#00131f;
  box-shadow:0 12px 26px rgba(56,189,248,.35)}
.btn-p:hover{color:#00131f;transform:translateY(-1px)}
.btn-g{background:linear-gradient(135deg,var(--gold),#f59e0b);color:#2a1c00;
  box-shadow:0 12px 26px rgba(251,191,36,.32)}
.btn-g:hover{color:#2a1c00;transform:translateY(-1px)}
.btn-o{background:transparent;border-color:var(--sky);color:var(--navy)}
.btn-o:hover{background:var(--sky-l);color:var(--navy)}
.btn-w{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.42);color:#fff}
.btn-w:hover{color:#fff;background:rgba(255,255,255,.24)}
.btn-sm{padding:9px 18px;font-size:15px}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin:18px 0}

/* ---------- top bar / nav ---------- */
.topbar{position:sticky;top:0;z-index:60;background:rgba(11,18,32,.97);
  backdrop-filter:blur(10px);border-bottom:1px solid rgba(56,189,248,.28)}
.topbar .wrap{display:flex;align-items:center;gap:16px;min-height:66px}
.logo{display:flex;align-items:center;gap:9px;color:#fff;font-weight:800;font-size:22px;letter-spacing:.5px}
.logo b{color:var(--sky)}
.logo i{width:10px;height:10px;border-radius:50%;background:var(--sky);
  box-shadow:0 0 12px var(--sky);display:inline-block}
.nav{margin-left:auto;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.nav a{color:#cfe3f7;font-size:15px;font-weight:500;white-space:nowrap}
.nav a:hover{color:var(--sky)}
.nav a.on{color:var(--sky)}
.nav .btn{padding:9px 18px;font-size:15px}
.burger{display:none;margin-left:auto;background:none;border:0;color:#fff;font-size:26px;line-height:1;cursor:pointer}
@media(max-width:960px){
  .nav{position:fixed;inset:66px 0 auto;flex-direction:column;align-items:flex-start;
    background:rgba(11,18,32,.99);padding:14px 22px 22px;gap:6px;border-bottom:1px solid rgba(56,189,248,.3)}
  .nav a{width:100%;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.07);font-size:16px}
  .nav .btn{width:100%;margin-top:10px}
  .nav.hide{display:none}
  .burger{display:block}
}

/* ---------- marquee ticker ---------- */
.ticker{background:var(--navy2);color:#bcd9f2;overflow:hidden;border-bottom:1px solid rgba(56,189,248,.2)}
.ticker .track{display:flex;gap:38px;padding:9px 0;white-space:nowrap;animation:slide 34s linear infinite;font-size:14.5px}
.ticker b{color:var(--gold)}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media(prefers-reduced-motion:reduce){.ticker .track{animation:none}}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:60px 0 54px;
  background:linear-gradient(160deg,#e5f3ff 0%,#f6fbff 55%,#dceefd 100%)}
.hero .grid2{display:grid;grid-template-columns:1.15fr .85fr;gap:38px;align-items:center}
.hero-orb{position:absolute;border-radius:50%;filter:blur(54px);opacity:.5;pointer-events:none}
.o1{width:320px;height:320px;background:#38bdf8;top:-90px;right:-40px}
.o2{width:260px;height:260px;background:#fbbf24;bottom:-110px;left:-60px;opacity:.32}
.o3{width:200px;height:200px;background:#6366f1;top:38%;left:46%;opacity:.24}
.badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:var(--pill);padding:8px 16px;font-size:14.5px;font-weight:600;color:var(--navy);box-shadow:var(--shadow)}
.badge i{width:8px;height:8px;border-radius:50%;background:var(--green);display:inline-block}
.hero h1{margin:18px 0 14px}
.hero h1 span{color:var(--sky-d)}
.hero .sub{font-size:17.5px;color:var(--muted);max-width:640px}
.chips{display:flex;flex-wrap:wrap;gap:9px;margin-top:20px}
.chip{background:#fff;border:1px solid var(--line);border-radius:var(--pill);
  padding:7px 14px;font-size:14px;font-weight:600;color:var(--navy)}
.hero-art{position:relative;background:#fff;border:1px solid var(--line);border-radius:26px;
  padding:18px;box-shadow:var(--shadow)}
.hero-art .artcap{display:flex;justify-content:space-between;align-items:center;
  font-size:13.5px;color:var(--muted);margin-bottom:10px}
.hero-art .artcap b{color:var(--navy)}
.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:14px}
.facts div{background:var(--sky-l);border-radius:14px;padding:12px 14px}
.facts b{display:block;font-size:20px;color:var(--navy);line-height:1.2}
.facts span{font-size:13.5px;color:var(--muted)}
@media(max-width:900px){.hero .grid2{grid-template-columns:1fr}.hero{padding:34px 0 30px}}

/* page head (inner pages) */
.pagehead{position:relative;overflow:hidden;padding:40px 0 34px;
  background:linear-gradient(150deg,#0b1220,#16233c 65%,#0b3a5c)}
.pagehead h1{color:#fff;margin:10px 0 12px}
.pagehead .sub{color:#c7dcf2;max-width:760px;font-size:16.5px}
.crumb{font-size:13.5px;color:#9fc0e0}
.crumb a{color:#9fc0e0}
.crumb a:hover{color:var(--sky)}
.pagehead .chips .chip{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.24);color:#e6f2ff}

/* ---------- section label ---------- */
.label{display:inline-block;background:#fff;border:1px solid rgba(56,189,248,.5);color:var(--sky-d);
  border-radius:var(--pill);padding:6px 16px;font-size:13.5px;font-weight:700;letter-spacing:.4px}
.label-d{background:rgba(56,189,248,.16);border-color:rgba(56,189,248,.4);color:var(--sky)}
.sec-head{max-width:800px;margin-bottom:26px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head p{color:var(--muted)}

/* ---------- grid / cards ---------- */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:0 10px 26px rgba(2,6,23,.05)}
.card h3{margin-top:0}
.card p:last-child{margin-bottom:0}
.card .ico{width:46px;height:46px;border-radius:14px;background:var(--sky-l);
  display:flex;align-items:center;justify-content:center;margin-bottom:12px;font-size:22px}
.card-t{font-weight:700;color:var(--heading);font-size:18px;margin:0 0 .5em}
.card-hl{border-color:rgba(56,189,248,.6);box-shadow:0 18px 42px rgba(56,189,248,.22);position:relative}
.tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--gold);
  color:#2a1c00;border-radius:var(--pill);padding:4px 16px;font-size:13px;font-weight:800;white-space:nowrap}
.dcard{background:var(--navy);color:#dce9f8;border-color:rgba(255,255,255,.12)}
.dcard h2,.dcard h3,.dcard .card-t{color:#fff}
.dcard p{color:#c7dcf2}
.dcard .ico{background:rgba(56,189,248,.18)}

/* ---------- stats ---------- */
.statband{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:22px 0}
.statband div{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-align:center}
.statband b{display:block;font-size:26px;color:var(--sky-d);line-height:1.15}
.statband span{font-size:14px;color:var(--muted)}
@media(max-width:820px){.statband{grid-template-columns:repeat(2,1fr)}}

/* ---------- scroll cards (promo carousel) ---------- */
.rail{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(290px,1fr);gap:16px;
  overflow-x:auto;padding:6px 2px 16px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.rail::-webkit-scrollbar{height:8px}
.rail::-webkit-scrollbar-thumb{background:rgba(56,189,248,.5);border-radius:8px}
.rail>*{scroll-snap-align:start}
.promo{background:linear-gradient(160deg,#0b1220,#16304f);color:#e8f3ff;
  border-radius:22px;padding:22px;border:1px solid rgba(56,189,248,.32)}
.promo .val{font-size:32px;font-weight:800;color:var(--gold);line-height:1.2}
.promo h3{color:#fff;margin:.35em 0}
.promo p{color:#c7dcf2;font-size:15.5px}
.promo .pcta{color:var(--sky);font-weight:700;font-size:15px}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:st}
@media(max-width:960px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}
.step:before{counter-increment:st;content:counter(st);display:flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--sky),var(--sky-d));
  color:#00131f;font-weight:800;margin-bottom:12px}
.step h3{font-size:18px;margin-bottom:.4em}
.step p{font-size:15.5px;color:var(--muted);margin:0}

/* ---------- table ---------- */
.tbwrap{overflow-x:auto;margin:20px 0}
table.tb{width:100%;border-collapse:collapse;background:#fff;border-radius:14px;overflow:hidden;
  box-shadow:0 10px 26px rgba(2,6,23,.06);font-size:15.5px;min-width:520px}
table.tb th,table.tb td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.tb thead th{background:var(--navy);color:#fff;font-weight:700}
table.tb tbody tr:nth-child(even){background:#f7fbff}
table.tb td:first-child{font-weight:600;color:var(--heading)}
.tbnote{font-size:14px;color:var(--muted);margin-top:-6px}

/* ---------- FAQ ---------- */
.faq{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:10px;overflow:hidden}
.faq summary{cursor:pointer;padding:15px 18px;font-weight:700;color:var(--heading);list-style:none;
  display:flex;gap:10px;align-items:flex-start;font-size:16.5px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:before{content:"?";flex:0 0 24px;height:24px;border-radius:50%;background:var(--sky-l);
  color:var(--sky-d);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px}
.faq[open] summary{border-bottom:1px solid var(--line)}
.faq p{margin:0;padding:14px 18px;color:var(--muted)}

/* ---------- callout ---------- */
.callout{background:#fff8e6;border-left:5px solid var(--gold);border-radius:12px;padding:16px 18px;margin:20px 0}
.callout p:last-child{margin-bottom:0}
.callout b{color:#7c4a02}
.ymyl{background:#eef7ff;border-left:5px solid var(--sky);border-radius:12px;padding:16px 18px;margin:20px 0;font-size:15.5px}
.ymyl p:last-child{margin-bottom:0}

/* ---------- toc ---------- */
.toc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin:28px 0 30px}
.toc h2{font-size:20px;margin-bottom:.5em}
.toc ol{margin:0;padding-left:1.3em}
.toc a{font-weight:600}

/* ---------- article typography ---------- */
.article h2{margin-top:38px}
.article h3{margin-top:26px}
.article>section{padding:0}
.pill-list{display:flex;flex-wrap:wrap;gap:10px;padding:0;list-style:none;margin:18px 0}
.pill-list li{background:#fff;border:1px solid var(--line);border-radius:var(--pill);padding:8px 16px;font-size:15px;font-weight:600;color:var(--navy)}
.checklist{list-style:none;padding:0}
.checklist li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px;margin-bottom:9px}
.checklist li:before{content:"✓";color:var(--green);font-weight:800;margin-right:9px}

/* ---------- CTA band ---------- */
.ctaband{background:linear-gradient(135deg,#0b1220,#16304f);color:#e8f3ff;padding:44px 0;text-align:center}
.ctaband h2{color:#fff}
.ctaband p{color:#c7dcf2;max-width:720px;margin:0 auto 18px}
.ctaband .btns{justify-content:center}

/* ---------- testimonials ---------- */
.testi{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.testi .who{font-weight:700;color:var(--heading);font-size:15px}
.testi .stars{color:var(--gold);font-size:15px;letter-spacing:2px}
.testi p{font-size:15.5px;color:var(--muted)}

/* ---------- footer ---------- */
footer{background:var(--navy);color:#a9c4de;padding:42px 0 22px;font-size:15px}
footer h3,footer h4{color:#fff;font-size:16px;margin-bottom:.7em}
.fgrid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px}
@media(max-width:900px){.fgrid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.fgrid{grid-template-columns:1fr}}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin:.35em 0}
footer a{color:#a9c4de}
footer a:hover{color:var(--sky)}
.fbot{margin-top:28px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13.5px;color:#8aa7c4}
.fnote{font-size:13.5px;color:#8aa7c4;margin-top:10px}
.disclaim{background:rgba(255,255,255,.05);border-radius:12px;padding:14px 16px;margin-top:22px;font-size:13.5px;color:#9fbdd8}
.skiplink{position:absolute;left:-9999px;top:0;background:#fff;color:#000;padding:10px 16px;z-index:99}
.skiplink:focus{left:8px;top:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}