:root{
  --hue:#1D6FD6; --hue2:#11478C; --bg:#E9F1FD;
  --ink:#2D3748; --head:#11478C; --line:rgba(0,0,0,.10);
  --gold1:#FFD54A; --gold2:#FFB300; --gold3:#FF8F00;
  --red1:#FF2A2A; --red2:#D50000; --red3:#9F0000;
  --black:#1A1A1A;
  --maxw:1170px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Kanit',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:17px;line-height:1.6;color:var(--ink);
  background-color:var(--bg);background-image:url('bg.svg');background-repeat:repeat;
  padding-bottom:84px;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--hue2)}
a:hover{text-decoration:none}
h1,h2,h3,h4{font-weight:700;line-height:1.35;color:var(--head)}
h1{font-size:32px;margin:0 0 1rem}
h2{font-size:28px;margin:42px 0 1rem;scroll-margin-top:96px}
h3{font-size:24px;margin:28px 0 .75rem;scroll-margin-top:96px}
p{font-size:17px;line-height:1.6;color:var(--ink);margin-bottom:32px}
ul,ol{margin:0 0 32px 1.4rem}
li{margin-bottom:.5rem}
strong{color:var(--hue2)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 15px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:.6rem 1rem;z-index:10000}
.skip:focus{left:8px;top:8px}

/* ---------- header ---------- */
.site-header{background:linear-gradient(180deg,var(--hue) 0%,var(--hue2) 100%);
  box-shadow:0 2px 10px rgba(0,0,0,.18);position:sticky;top:0;z-index:900}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:80px}
.brand{display:flex;align-items:center;text-decoration:none}
.brand svg,.brand img{height:54px;width:auto}
.nav ul{display:flex;list-style:none;gap:.2rem;margin:0;flex-wrap:wrap}
.nav a{display:block;color:#0E2A33;font-size:17px;text-decoration:none;padding:.5rem .7rem;border-radius:6px}
.nav a:hover{background:rgba(255,255,255,.55)}
.nav a[aria-current="page"]{background:rgba(255,255,255,.75);font-weight:600}
.nav-toggle{display:none}

/* ---------- hero ---------- */
.hero{position:relative;background:linear-gradient(135deg,var(--hue) 0%,var(--hue2) 100%);
  padding:3.2rem 0 3.6rem;text-align:center;overflow:hidden;border-bottom:4px solid rgba(255,255,255,.6)}
.hero::after{content:"";position:absolute;inset:0;background-image:url('pattern.svg');
  background-repeat:repeat;opacity:.30;pointer-events:none}
.hero-inner{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;padding:0 15px}
.hero-line{font-weight:800;letter-spacing:.5px;text-wrap:balance}
.hero-line-1{font-size:clamp(2rem,5.2vw,3.4rem);color:#FFF3B0;
  -webkit-text-stroke:2px rgba(10,40,50,.75);text-shadow:0 4px 16px rgba(0,0,0,.35)}
.hero-line-2{font-size:clamp(1.5rem,3.8vw,2.5rem);color:#FFFFFF;
  -webkit-text-stroke:2px rgba(10,40,50,.6);margin-top:.35rem;text-shadow:0 3px 12px rgba(0,0,0,.3)}
.hero-line-3{font-size:clamp(1.02rem,2.3vw,1.38rem);color:#FFFFFF;
  -webkit-text-stroke:.7px rgba(0,0,0,.55);margin-top:.6rem;font-weight:600}
.hero-cta{display:inline-block;margin-top:1.6rem;padding:.95rem 2.4rem;border-radius:9999px;
  font-size:1.1rem;font-weight:800;text-decoration:none;color:#3A2600;
  background:linear-gradient(180deg,#FFF4B0 0%,#FFD54A 45%,#FFB300 100%);
  box-shadow:0 8px 20px rgba(0,0,0,.28);transition:transform .15s,filter .2s}
.hero-cta:hover{transform:scale(1.03);filter:brightness(1.05)}

/* ---------- main ---------- */
.site-main{padding:1.5rem 0 2rem}
.breadcrumb{font-size:.86rem;color:#4A5568;margin-bottom:1rem}
.breadcrumb ol{display:flex;gap:.45rem;list-style:none;margin:0;flex-wrap:wrap}
.breadcrumb a{color:var(--hue2);text-decoration:none}
.breadcrumb li+li::before{content:"/";margin-right:.45rem;color:#94A3B8}
main h1{background:transparent}
.entry{max-width:100%}
.entry h2{border-bottom:3px solid var(--hue);padding-bottom:.4rem}
.entry a{text-decoration:underline}

/* สารบัญ */
.toc{background:rgba(255,255,255,.80);border:1px solid var(--line);border-left:6px solid var(--hue);
  border-radius:10px;padding:1.1rem 1.3rem;margin:0 0 2rem;box-shadow:0 4px 14px rgba(0,0,0,.06)}
.toc h2{font-size:1.05rem;margin:0 0 .6rem;letter-spacing:.2px;border:0;padding:0}
.toc ol{margin:0 0 0 1.2rem}
.toc li{margin-bottom:.3rem}
.toc a{text-decoration:none;color:var(--hue2);font-weight:500}
.toc a:hover{text-decoration:underline}

/* ตาราง */
.table-wrap{overflow-x:auto;margin:0 0 32px}
table{width:100%;border-collapse:collapse;background:#fff;font-size:16px;min-width:420px}
caption{caption-side:top;text-align:left;font-weight:600;color:var(--head);padding:.4rem 0 .6rem}
th,td{border:1px solid var(--line);padding:.65rem .8rem;text-align:left}
thead th{background:var(--hue);color:#fff;font-weight:600}
tbody tr:nth-child(even){background:rgba(255,255,255,.72)}

/* การ์ดสรุป */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem;margin:0 0 32px}
.card{background:#fff;border-radius:12px;padding:1.15rem 1.25rem;border-top:4px solid var(--hue);
  box-shadow:0 6px 16px rgba(0,0,0,.10)}
.card strong{display:block;font-size:1.05rem;color:var(--hue2);margin-bottom:.35rem}
.card p{margin:0;font-size:15.5px;line-height:1.55}

/* FAQ */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:10px;margin-bottom:.7rem;overflow:hidden}
.faq-item summary{cursor:pointer;font-weight:600;color:var(--head);padding:.95rem 1.2rem;list-style:none;
  display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;font-size:17px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-weight:700;color:var(--hue2);font-size:1.3rem;line-height:1}
.faq-item[open] summary::after{content:"–"}
.faq-item .faq-a{padding:0 1.2rem 1rem}
.faq-item .faq-a p{margin-bottom:.7rem}
.faq-item .faq-a p:last-child{margin-bottom:0}

/* CTA กลางหน้า */
.cta-band{background:linear-gradient(135deg,var(--hue2) 0%,var(--hue) 100%);border-radius:12px;
  padding:1.8rem 1.4rem;text-align:center;color:#fff;margin:2.2rem 0;box-shadow:0 10px 26px rgba(0,0,0,.16)}
.cta-band h2{color:#fff;margin:0 0 .5rem;font-size:1.5rem;border:0;padding:0}
.cta-band p{color:rgba(255,255,255,.92);margin-bottom:1rem}
.cta-band .btn{display:inline-block;padding:.95rem 2.3rem;border-radius:8px;font-weight:800;font-size:1.05rem;
  text-decoration:none;color:#fff;background:linear-gradient(180deg,var(--red1) 0%,var(--red2) 50%,var(--red3) 100%);
  box-shadow:0 6px 18px rgba(0,0,0,.25)}
.cta-band .btn:hover{filter:brightness(1.07)}

/* ---------- footer ---------- */
.site-footer{background:#14202B;color:#C9D6E2;padding:2.4rem 0 1.4rem;margin-top:1rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.6rem}
.site-footer h2,.site-footer h3{color:#fff;font-size:1.05rem;margin:0 0 .7rem}
.site-footer p{color:#A8B8C6;font-size:15px;margin-bottom:.7rem;line-height:1.55}
.site-footer ul{list-style:none;margin:0}
.site-footer li{margin-bottom:.45rem}
.site-footer a{color:#E6EEF5;text-decoration:none;font-size:15.5px}
.site-footer a:hover{color:var(--gold1);text-decoration:underline}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:1.8rem;padding-top:1rem;
  display:flex;flex-wrap:wrap;gap:.6rem 1.2rem;justify-content:space-between;font-size:13.5px;color:#8FA2B2}
.ymyl{font-size:13px;color:#8FA2B2;margin-top:.6rem;line-height:1.6}

/* ---------- แถบปุ่มติดล่างจอ ---------- */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;width:100%;z-index:99999;display:flex;align-items:stretch;
  box-shadow:0 -6px 20px rgba(0,0,0,.35);border-top:2px solid rgba(255,213,74,.45);font-family:'Kanit',sans-serif}
.sticky-cta a{flex:1;display:flex;align-items:center;justify-content:center;min-height:68px;padding:14px 10px;
  text-decoration:none;color:#fff;font-size:22px;font-weight:800;letter-spacing:.2px;
  text-shadow:0 1px 2px rgba(0,0,0,.35);transition:filter .2s,transform .15s}
.sticky-cta a:active{transform:scale(.985)}
.sticky-cta .cta-login{background:linear-gradient(180deg,#1A1A1A 0%,#0B0B0B 100%);
  border-right:1px solid rgba(255,255,255,.08)}
.sticky-cta .cta-login span{background:linear-gradient(180deg,#FFF4B0 0%,#FFD54A 45%,#FFB300 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:#FFD54A}
.sticky-cta .cta-register{background:linear-gradient(180deg,var(--red1) 0%,var(--red2) 45%,var(--red3) 100%)}
.sticky-cta a:hover{filter:brightness(1.08)}

@media (max-width:900px){
  h1{font-size:27px} h2{font-size:23px} h3{font-size:20px}
  p{font-size:16.5px}
  .header-inner{min-height:auto;padding:.45rem 0;flex-direction:row;flex-wrap:wrap;gap:.3rem;justify-content:center}
  .brand svg,.brand img{height:38px}
  .nav ul{justify-content:center;gap:0}
  .nav a{font-size:14.5px;padding:.35rem .5rem}
  .hero{padding:2.2rem 0 2.6rem}
  .sticky-cta a{font-size:19px;min-height:64px}
  body{padding-bottom:78px}
  .cta-band{padding:1.4rem 1rem}
  .toc{padding:.9rem 1rem}
}
@media (max-width:600px){
  .brand svg,.brand img{height:34px}
  .nav a{font-size:13.5px;padding:.3rem .4rem}
  h1{font-size:24px} h2{font-size:21px}
  .hero-line-1{font-size:1.75rem}
  .hero-line-2{font-size:1.3rem}
  .sticky-cta a{font-size:17px;min-height:60px}
}