@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@100..800&display=swap');
:root{
  --bg:#e5f3ff;--surface:#fff;--text:#111827;--heading:#0b1220;--muted:#475569;
  --primary:#38bdf8;--on-primary:#000;--accent:#38bdf8;--border:rgba(2,6,23,0.12);
  --ring:rgba(56,189,248,0.45);--dark:#0b1220;--darker:#070d17;
  --r-lg:16px;--r-md:12px;--r-pill:50px;--measure:880px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:'Sarabun',system-ui,sans-serif;line-height:1.75;font-size:17px}
a{color:#0369a1;text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%;height:auto}
.wrap{width:min(var(--measure),92%);margin-inline:auto}
.wrap-wide{width:min(1180px,92%);margin-inline:auto}
/* ===== navbar ===== */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-in{display:flex;align-items:center;gap:18px;padding:12px 0}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:21px;color:var(--heading);letter-spacing:.3px}
.brand:hover{text-decoration:none}
.nav-links{display:flex;gap:16px;margin-left:auto;flex-wrap:wrap}
.nav-links a{color:var(--muted);font-weight:500;font-size:15px}
.nav-links a:hover{color:#0369a1;text-decoration:none}
.nav-cta{display:flex;gap:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 26px;border-radius:var(--r-pill);font-weight:600;font-size:16px;border:1px solid transparent;cursor:pointer;transition:.15s}
.btn-sky{background:var(--primary);color:var(--on-primary);box-shadow:0 8px 24px rgba(56,189,248,.35)}
.btn-sky:hover{background:#67d2fa;transform:translateY(-1px);text-decoration:none}
.btn-ghost{background:transparent;color:var(--heading);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--primary);text-decoration:none}
.btn-sm{padding:8px 18px;font-size:14px}
/* ===== hero ===== */
.hero{position:relative;overflow:hidden;color:#eef6ff;background:linear-gradient(135deg,#0b1220,#0c2340,#0b3a5c);padding:88px 0 72px}
.hero .orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.4;pointer-events:none}
.orb-1{width:420px;height:420px;background:rgba(56,189,248,.5);top:-140px;right:-100px}
.orb-2{width:360px;height:360px;background:rgba(14,165,233,.35);bottom:-160px;left:-120px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(255,255,255,.22);border-radius:var(--r-pill);padding:8px 18px;font-size:14px;color:#d7e9f7;margin-bottom:22px;position:relative}
.hero-badge b{color:#fff}
.hero h1{position:relative;font-size:clamp(30px,4.4vw,52px);line-height:1.25;font-weight:800;color:#fff}
.hero h1 span{color:var(--primary)}
.hero-lead{position:relative;margin:22px auto 0;max-width:720px;font-size:19px;color:#cfe3f4}
.hero-btns{position:relative;display:flex;gap:14px;justify-content:center;margin-top:30px;flex-wrap:wrap}
.btn-glow{background:var(--primary);color:#03121f;box-shadow:0 12px 34px rgba(56,189,248,.55)}
.btn-glow:hover{background:#67d2fa;transform:translateY(-2px);text-decoration:none}
.btn-outline-glow{background:rgba(255,255,255,.05);color:#eaf6ff;border-color:rgba(255,255,255,.32)}
.btn-outline-glow:hover{border-color:var(--primary);background:rgba(56,189,248,.16);text-decoration:none}
.hero-facts{position:relative;display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:32px}
.fact-chip{border:1px solid rgba(255,255,255,.16);border-radius:var(--r-pill);padding:8px 18px;font-size:14.5px;color:#d7e9f7;background:rgba(255,255,255,.05)}
.fact-chip b{color:#fff}
.hero-in{position:relative;display:flex;align-items:center;gap:36px}
.hero-in .hero-text{flex:1}
.hero-in .hero-art{width:300px;flex-shrink:0}
.hero.compact{padding:56px 0 48px}
.hero.compact h1{font-size:clamp(26px,3.4vw,40px)}
/* ===== sections ===== */
.sec{padding:64px 0}
.sec-alt{background:rgba(255,255,255,.62)}
.sec-label{display:inline-block;font-size:13px;letter-spacing:2px;text-transform:uppercase;color:#0369a1;font-weight:700;margin-bottom:12px}
.sec-title{font-size:clamp(23px,2.6vw,32px);font-weight:800;color:var(--heading);line-height:1.35}
.sec-sub{margin-top:12px;color:var(--muted)}
.sec-head{margin-bottom:36px}
/* ===== cards ===== */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:26px}
.feature-card{transition:.15s}
.feature-card:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:0 14px 30px rgba(3,105,161,.12)}
.feature-icon{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,#38bdf8,#0ea5e9);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feature-icon svg{width:26px;height:26px;stroke:#04222f}
.feature-card h3{font-size:19px;color:var(--heading);margin-bottom:8px}
.feature-card p{color:var(--muted);font-size:15.5px}
/* ===== steps ===== */
.steps{display:grid;gap:18px}
.step-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px 26px}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;background:var(--primary);color:#03121f;font-weight:800;margin-bottom:12px}
.step-item h3{font-size:18px;color:var(--heading);margin-bottom:6px}
.step-item p{color:var(--muted);font-size:15.5px}
/* ===== table ===== */
.table-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);margin:26px 0}
table{width:100%;border-collapse:collapse;font-size:16px}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top}
th{background:rgba(56,189,248,.14);color:var(--heading);font-weight:700}
tr:last-child td{border-bottom:none}
tbody tr:nth-child(even){background:rgba(56,189,248,.05)}
td b{color:var(--heading)}
/* ===== payments (dark) ===== */
.pay-sec{background:var(--dark);color:#e8f2fa;padding:64px 0}
.pay-sec .sec-title{color:#fff}
.pay-sec .sec-sub{color:#a9c3d6}
.pay-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-lg);padding:22px}
.pay-name{font-size:19px;font-weight:700;color:#fff;margin-bottom:6px}
.pay-tag{display:inline-block;font-size:12.5px;background:rgba(56,189,248,.2);color:#bfeaff;border-radius:var(--r-pill);padding:3px 12px;margin-top:10px}
.pay-card p{color:#a9c3d6;font-size:15px}
/* ===== testimonials ===== */
.testi-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:26px}
.testi-card p{color:var(--muted)}
.testi-who{display:flex;align-items:center;gap:12px;margin-top:18px}
.testi-ava{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#38bdf8,#0ea5e9);color:#04222f;font-weight:800;display:flex;align-items:center;justify-content:center}
.testi-who b{color:var(--heading);display:block;font-size:15px}
.testi-who span{color:var(--muted);font-size:13px}
.stars{color:#f59e0b;font-size:15px;letter-spacing:2px}
/* ===== CTA ===== */
.cta{background:linear-gradient(135deg,#0c2340,#0b3a5c);border-radius:22px;padding:52px 40px;text-align:center;color:#eef6ff}
.cta h2{font-size:clamp(23px,2.6vw,32px);font-weight:800;color:#fff}
.cta p{margin:14px auto 0;max-width:640px;color:#cfe3f4}
.cta .btn-glow{margin-top:26px}
.cta .micro{margin-top:14px;font-size:13px;color:#8fb3c9}
/* ===== article ===== */
main{display:block}
.toc{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:22px 26px;margin:34px 0}
.toc b{display:block;color:var(--heading);margin-bottom:10px;font-size:18px}
.toc ol{margin:0 0 0 22px}
.toc li{margin:6px 0}
main h2{font-size:clamp(21px,2.2vw,27px);font-weight:800;color:var(--heading);line-height:1.4;margin:48px 0 16px;scroll-margin-top:90px}
main h3{font-size:19px;font-weight:700;color:var(--heading);margin:32px 0 10px;scroll-margin-top:90px}
main p{margin:14px 0}
main ul,main ol{margin:14px 0 14px 24px}
main li{margin:8px 0}
main .lead{font-size:18.5px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);margin:12px 0;overflow:hidden}
.faq-item summary{cursor:pointer;list-style:none;padding:18px 22px;font-weight:700;color:var(--heading);position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'▾';position:absolute;right:22px;color:#0369a1;transition:.2s}
.faq-item[open] summary::after{transform:rotate(180deg)}
.faq-item p{padding:0 22px 18px;color:var(--muted);margin:0}
.kpi-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:26px 0}
.kpi{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:18px;text-align:center}
.kpi b{display:block;font-size:26px;color:#0369a1}
.kpi span{color:var(--muted);font-size:14px}
.fnote{color:var(--muted);font-size:13px}
.fnote2{color:var(--muted);font-size:13px}
.s-open p{font-size:17.5px}
/* ===== footer ===== */
footer{background:#fff;border-top:1px solid var(--border);padding:48px 0 28px;margin-top:64px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}
.foot-grid h4{color:var(--heading);font-size:16px;margin-bottom:14px}
.foot-grid a{display:block;color:var(--muted);font-size:14.5px;margin:7px 0}
.foot-note{margin-top:32px;padding-top:22px;border-top:1px solid var(--border);color:var(--muted);font-size:13.5px;line-height:1.9}
.badge18{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;border:2px solid #dc2626;color:#dc2626;font-weight:800;font-size:13px;margin-right:10px}
/* ===== responsive ===== */
@media (max-width:1024px){.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:860px){
  .nav-links{display:none}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .hero-in{flex-direction:column-reverse}
  .hero-in .hero-art{width:200px}
  .kpi-row{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero{padding:60px 0 52px}
}