:root{
  --bg:#020617; --surface:#040c2e; --surface2:#08123a;
  --text:#eaedf3; --heading:#f8fafc; --muted:#a3adbe; --border:rgba(255,255,255,.12);
  --primary:#7C4DFF; --primary2:#4527A0; --accent:#4527A0;
  --gold:#f0b429; --on-primary:#0b0620;
  --maxw:1180px; --r:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Sarabun','Noto Sans Thai','Leelawadee UI',Thonburi,Tahoma,
              system-ui,-apple-system,'Segoe UI',sans-serif;
  background:var(--bg);color:var(--text);font-size:1rem;line-height:1.75;
  overflow-x:hidden;padding-bottom:76px;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--gold)}
a:hover{text-decoration:none}
h1,h2,h3{color:var(--heading);font-weight:700;line-height:1.4}
h1{font-size:1.9rem;margin:0 0 1rem}
h2{font-size:1.4rem;margin:2.4rem 0 .9rem;scroll-margin-top:90px}
h3{font-size:1.12rem;margin:1.6rem 0 .6rem;scroll-margin-top:90px;color:var(--gold)}
p{margin-bottom:1.5rem}
ul,ol{margin:0 0 1.5rem 1.4rem}
li{margin-bottom:.45rem}
strong{color:var(--heading)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;background:var(--surface);padding:.5rem 1rem;z-index:99}

/* ---------- topbar ---------- */
.topbar{background:var(--surface2);border-bottom:1px solid var(--border);font-size:.85rem}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:.6rem;min-height:40px;flex-wrap:wrap}
.topbar-left{display:flex;gap:1rem;color:var(--muted)}
.topbar-right{display:flex;gap:.5rem;align-items:center}
.btn{display:inline-block;padding:.5rem 1.1rem;border-radius:999px;text-decoration:none;
  font-weight:700;font-size:.9rem;line-height:1.3;transition:filter .2s,transform .15s}
.btn:hover{filter:brightness(1.12)}
.btn-ghost{border:1px solid var(--border);color:var(--text)}
.btn-solid{background:linear-gradient(180deg,var(--primary) 0%,var(--primary2) 100%);
  color:#fff;box-shadow:0 4px 14px rgba(0,0,0,.35)}
.btn-gold{background:linear-gradient(180deg,#ffe08a 0%,var(--gold) 60%,#c8891a 100%);
  color:#2a1a00}

/* ---------- header ---------- */
.site-header{background:rgba(4,12,46,.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--border);position:sticky;top:0;z-index:900}
.header-inner{display:flex;align-items:center;gap:1rem;min-height:68px}
.logo{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--heading)}
.logo img{height:38px;width:auto}
.logo b{font-size:1.3rem;letter-spacing:.5px}
.main-nav{margin-left:auto}
.main-nav ul{display:flex;list-style:none;gap:.15rem;margin:0;flex-wrap:wrap}
.main-nav a{display:block;padding:.5rem .7rem;border-radius:8px;text-decoration:none;
  color:var(--text);font-size:.95rem}
.main-nav a:hover{background:rgba(255,255,255,.07);color:var(--gold)}
.main-nav a[aria-current="page"]{color:var(--gold);background:rgba(255,255,255,.06)}
.burger{display:none;background:none;border:1px solid var(--border);color:var(--text);
  font-size:1.3rem;border-radius:8px;padding:.15rem .6rem;margin-left:auto;cursor:pointer}

/* ---------- announcement ---------- */
.announce{background:linear-gradient(90deg,var(--primary2),var(--primary) 60%,var(--primary2));
  color:#fff;font-size:.9rem}
.announce .container{display:flex;gap:.6rem;align-items:center;padding:.55rem 16px}
.announce .tag{background:rgba(0,0,0,.35);border-radius:6px;padding:.1rem .5rem;font-weight:700;white-space:nowrap}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--border);
  background:radial-gradient(120% 140% at 12% 0%,rgba(139,92,246,.30) 0%,transparent 55%),
             linear-gradient(180deg,var(--surface) 0%,var(--bg) 100%)}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:2rem;align-items:center;
  padding:2.6rem 16px;max-width:var(--maxw);margin:0 auto}
.hero-lines p{margin:0}
.hero-l1{font-size:clamp(1.6rem,4.4vw,2.6rem);font-weight:800;color:var(--heading);line-height:1.3}
.hero-l2{font-size:clamp(1.05rem,2.6vw,1.5rem);font-weight:700;color:var(--gold);margin-top:.35rem!important}
.hero-l3{font-size:1rem;color:var(--muted);margin-top:.6rem!important}
.hero-cta{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.4rem}
.hero-cta .btn{padding:.85rem 1.7rem;font-size:1.05rem}
.hero-art{border:1px solid var(--border);border-radius:var(--r);overflow:hidden;background:var(--surface)}
.hero-art img{width:100%}

/* ---------- main ---------- */
main{padding:2rem 0 1rem}
.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:1rem}
.breadcrumb ol{display:flex;gap:.45rem;list-style:none;margin:0;flex-wrap:wrap}
.breadcrumb a{color:var(--muted);text-decoration:none}
.breadcrumb li+li::before{content:"/";margin-right:.45rem;opacity:.5}
.lede{font-size:1.06rem;color:var(--muted);border-left:3px solid var(--primary);
  padding-left:1rem;margin-bottom:2rem}

/* สารบัญ */
.toc{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);
  padding:1.1rem 1.3rem;margin:0 0 2.2rem}
.toc h2{font-size:1.02rem;margin:0 0 .6rem;color:var(--gold)}
.toc ol{margin:0 0 0 1.3rem}
.toc a{text-decoration:none;color:var(--text)}
.toc a:hover{color:var(--gold);text-decoration:underline}

/* ตาราง */
.table-wrap{overflow-x:auto;margin:0 0 1.8rem;border:1px solid var(--border);border-radius:var(--r)}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:460px;background:var(--surface)}
caption{caption-side:top;text-align:left;padding:.7rem .9rem;color:var(--muted);font-size:.9rem}
th,td{border-bottom:1px solid var(--border);padding:.7rem .9rem;text-align:left}
thead th{background:var(--surface2);color:var(--heading)}
tbody tr:nth-child(even){background:rgba(255,255,255,.02)}

/* steps */
.steps{counter-reset:s;list-style:none;margin:0 0 1.8rem}
.steps li{counter-increment:s;position:relative;padding:.85rem 1rem .85rem 3.2rem;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r);margin-bottom:.6rem}
.steps li::before{content:counter(s);position:absolute;left:.9rem;top:.85rem;width:1.8rem;height:1.8rem;
  border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;
  justify-content:center;font-weight:700;font-size:.95rem}

/* callout (ลิงก์ TKSLOT ในเนื้อ) */
.callout{background:linear-gradient(135deg,rgba(139,92,246,.16),rgba(99,102,241,.10));
  border:1px solid var(--border);border-left:4px solid var(--gold);
  border-radius:var(--r);padding:1.1rem 1.3rem;margin:0 0 1.8rem}
.callout p{margin:0;color:var(--text)}
.callout a{font-weight:700}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--primary2) 0%,var(--primary) 100%);
  border-radius:var(--r);padding:1.8rem 1.4rem;text-align:center;margin:2.2rem 0;color:#fff}
.cta-band h2{color:#fff;margin:0 0 .5rem;font-size:1.3rem}
.cta-band p{color:rgba(255,255,255,.92);margin-bottom:1.1rem}
.cta-band .btn{padding:.85rem 2rem;font-size:1.05rem}

/* FAQ */
.faq details{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);
  margin-bottom:.6rem;overflow:hidden}
.faq summary{cursor:pointer;padding:.9rem 1.1rem;font-weight:700;color:var(--heading);
  list-style:none;display:flex;justify-content:space-between;gap:1rem;font-size:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold);font-weight:700;font-size:1.25rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq .faq-a{padding:0 1.1rem 1rem;color:var(--text)}
.faq .faq-a p:last-child{margin-bottom:0}

/* ---------- footer ---------- */
.site-footer{background:var(--surface2);border-top:1px solid var(--border);
  margin-top:2rem;padding:2.2rem 0 1.2rem;font-size:.95rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1.6rem}
.site-footer h2,.site-footer h3{font-size:1rem;color:var(--heading);margin:0 0 .7rem}
.site-footer p,.site-footer li{color:var(--muted);font-size:.93rem}
.site-footer ul{list-style:none;margin:0}
.site-footer a{color:var(--text);text-decoration:none}
.site-footer a:hover{color:var(--gold);text-decoration:underline}
.footer-bottom{border-top:1px solid var(--border);margin-top:1.6rem;padding-top:1rem;
  display:flex;flex-wrap:wrap;gap:.5rem 1.2rem;justify-content:space-between;font-size:.82rem;color:var(--muted)}
.ymyl{font-size:.82rem;color:var(--muted);margin-top:.8rem;line-height:1.7}

/* ---------- แถบปุ่มติดล่างจอ ---------- */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;display:flex;z-index:9999;
  box-shadow:0 -6px 20px rgba(0,0,0,.5);border-top:1px solid var(--border)}
.sticky-cta a{flex:1;display:flex;align-items:center;justify-content:center;gap:.4rem;
  min-height:64px;padding:12px 10px;text-decoration:none;font-weight:800;font-size:1.05rem;color:#fff}
.sticky-cta .s-login{background:var(--surface2);border-right:1px solid var(--border);color:var(--text)}
.sticky-cta .s-reg{background:linear-gradient(180deg,var(--primary) 0%,var(--primary2) 100%)}
.sticky-cta .s-offer{background:linear-gradient(180deg,#c8891a 0%,var(--gold) 45%,#ffe08a 100%);color:#2a1a00}

@media (max-width:920px){
  h1{font-size:1.55rem} h2{font-size:1.22rem}
  .hero-inner{grid-template-columns:1fr;padding:1.8rem 16px}
  .hero-art{order:-1}
  .burger{display:block}
  .main-nav{position:absolute;left:0;right:0;top:100%;background:var(--surface);
    border-bottom:1px solid var(--border);display:none;margin:0}
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;padding:.5rem .8rem}
  .site-header{position:sticky}
  .sticky-cta a{font-size:.95rem;min-height:60px}
  body{padding-bottom:70px}
}