:root{
  --navy:#11354D;--navy-deep:#0A2436;--navy-soft:#1B4566;
  --orange:#F68832;--orange-deep:#E5751A;--orange-soft:#FFA055;
  --bg:#FFFFFF;--bg-soft:#F8F8F6;--bg-cream:#F2EEE6;
  --ink:#11354D;--ink-soft:#5A6B7C;--muted:#8C99A8;
  --line:#E5E5E0;--line-soft:#EFEDE8;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'IBM Plex Sans Thai','Sora',-apple-system,sans-serif;
  background:var(--bg);color:var(--ink);
  line-height:1.7;font-weight:400;
  -webkit-font-smoothing:antialiased;
}

.blog-nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,0.96);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line);
  padding:18px 32px;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:12px;
}
.blog-nav-brand{
  font-family:'Sora',sans-serif;font-weight:800;
  font-size:18px;color:var(--navy);letter-spacing:0.1em;
  text-decoration:none;
}
.blog-nav-back{
  font-family:'Sora',sans-serif;font-size:13px;
  color:var(--ink-soft);text-decoration:none;
  display:inline-flex;align-items:center;gap:6px;
  transition:.2s;
}
.blog-nav-back:hover{color:var(--orange);gap:10px}

.blog-hero{
  background:var(--bg-soft);
  padding:80px 32px 64px;
}
.blog-hero-inner{
  max-width:760px;margin:0 auto;
}
.blog-hero-meta{
  display:flex;gap:14px;align-items:center;
  margin-bottom:24px;flex-wrap:wrap;
}
.blog-cat-tag{
  font-family:'Sora',sans-serif;font-size:11px;
  color:var(--orange);font-weight:700;
  letter-spacing:0.2em;text-transform:uppercase;
  background:rgba(246,136,50,0.1);
  padding:6px 14px;border-radius:100px;
}
.blog-date{font-size:13px;color:var(--muted);font-family:'Sora',sans-serif;font-weight:500}
.blog-read-time{font-size:13px;color:var(--muted);font-family:'Sora',sans-serif}
.blog-hero h1{
  font-size:clamp(28px,5vw,48px);
  font-weight:700;line-height:1.2;
  letter-spacing:-0.03em;color:var(--navy);
  margin-bottom:20px;
}
.blog-hero-desc{
  font-size:18px;color:var(--ink-soft);
  line-height:1.7;
}

.blog-cover{
  max-width:1100px;margin:-32px auto 0;
  padding:0 32px;
}
.blog-cover img{
  width:100%;display:block;
  border-radius:14px;
  box-shadow:0 24px 48px -16px rgba(17,53,77,0.2);
}

.blog-body{
  max-width:760px;margin:0 auto;
  padding:64px 32px 96px;
  font-size:17px;line-height:1.85;color:var(--ink);
}
.blog-body p{margin-bottom:24px}
.blog-body p:first-of-type::first-letter{
  font-size:64px;float:left;line-height:0.95;
  padding:6px 12px 0 0;font-weight:700;
  color:var(--orange);font-family:'Sora',sans-serif;
}
.blog-body h2{
  font-size:28px;font-weight:700;
  letter-spacing:-0.02em;color:var(--navy);
  margin:56px 0 20px;line-height:1.3;
}
.blog-body h2 .num{
  color:var(--orange);font-family:'Sora',sans-serif;
  font-size:0.7em;letter-spacing:0;margin-right:14px;
}
.blog-body h3{
  font-size:21px;font-weight:700;color:var(--navy);
  margin:36px 0 14px;letter-spacing:-0.01em;
}
.blog-body strong{color:var(--navy);font-weight:700}
.blog-body em{color:var(--orange);font-style:normal;font-weight:600}
.blog-body ul,.blog-body ol{
  margin:0 0 28px 0;padding-left:0;list-style:none;
}
.blog-body ul li,.blog-body ol li{
  position:relative;padding-left:32px;margin-bottom:14px;
  line-height:1.7;
}
.blog-body ul li::before{
  content:"";position:absolute;left:8px;top:14px;
  width:8px;height:8px;background:var(--orange);
  border-radius:50%;
}
.blog-body ol{counter-reset:item}
.blog-body ol li{counter-increment:item}
.blog-body ol li::before{
  content:counter(item);position:absolute;left:0;top:0;
  font-family:'Sora',sans-serif;font-size:13px;font-weight:700;
  color:#fff;background:var(--orange);
  width:22px;height:22px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  line-height:1;
}
.blog-body blockquote{
  margin:32px 0;padding:24px 28px;
  background:var(--bg-cream);border-left:4px solid var(--orange);
  border-radius:8px;font-size:17px;line-height:1.7;
  color:var(--navy);font-weight:500;
}
.blog-body .callout{
  margin:32px 0;padding:24px;
  background:rgba(246,136,50,0.06);
  border:1px solid rgba(246,136,50,0.25);
  border-radius:10px;
}
.blog-body .callout strong{color:var(--orange-deep);display:block;margin-bottom:8px;font-size:14px;letter-spacing:0.05em;text-transform:uppercase;font-family:'Sora',sans-serif}
.blog-body table{
  width:100%;border-collapse:collapse;
  margin:24px 0;font-size:15px;
}
.blog-body table th,.blog-body table td{
  padding:12px 16px;text-align:left;
  border-bottom:1px solid var(--line);
}
.blog-body table th{
  background:var(--navy);color:#fff;
  font-weight:600;font-size:14px;
}
.blog-body table tr:hover td{background:var(--bg-soft)}

.blog-cta{
  max-width:760px;margin:0 auto;
  padding:0 32px 96px;
}
.blog-cta-card{
  background:linear-gradient(135deg,var(--navy) 0%,var(--navy-deep) 100%);
  color:#fff;padding:48px;border-radius:16px;
  text-align:center;position:relative;overflow:hidden;
}
.blog-cta-card::before{
  content:"";position:absolute;
  bottom:-50px;right:-50px;width:240px;height:240px;
  background:radial-gradient(circle,rgba(246,136,50,0.25) 0%,transparent 70%);
  filter:blur(20px);
}
.blog-cta-card h3{
  font-size:26px;font-weight:300;color:#fff;
  letter-spacing:-0.02em;margin-bottom:14px;
  position:relative;z-index:1;
}
.blog-cta-card h3 strong{color:var(--orange);font-weight:700}
.blog-cta-card p{
  font-size:15px;color:rgba(255,255,255,0.8);
  margin-bottom:28px;position:relative;z-index:1;
}
.blog-cta-buttons{
  display:flex;gap:12px;flex-wrap:wrap;justify-content:center;
  position:relative;z-index:1;
}
.btn-orange,.btn-line{
  display:inline-flex;align-items:center;gap:8px;
  padding:15px 26px;border-radius:100px;
  font-size:14px;font-weight:600;
  text-decoration:none;transition:.3s;
  font-family:inherit;
}
.btn-orange{background:var(--orange);color:#fff}
.btn-orange:hover{background:var(--orange-deep);transform:translateY(-2px)}
.btn-line{background:#06C755;color:#fff}
.btn-line:hover{background:#05a847;transform:translateY(-2px)}

.blog-footer-nav{
  background:var(--bg-soft);padding:48px 32px;
  border-top:1px solid var(--line);
}
.blog-footer-inner{
  max-width:1100px;margin:0 auto;
  display:flex;justify-content:space-between;align-items:center;
  gap:16px;flex-wrap:wrap;
}
.blog-footer-nav h4{
  font-family:'Sora',sans-serif;font-size:13px;
  color:var(--muted);letter-spacing:0.2em;
  text-transform:uppercase;font-weight:700;
  margin-bottom:4px;
}
.blog-footer-nav a{
  color:var(--navy);font-weight:700;
  text-decoration:none;font-size:18px;
  letter-spacing:-0.01em;transition:.2s;
}
.blog-footer-nav a:hover{color:var(--orange)}

@media(max-width:700px){
  .blog-hero{padding:48px 20px 40px}
  .blog-cover{padding:0 20px;margin-top:-20px}
  .blog-body{padding:48px 20px 64px;font-size:16px}
  .blog-body p:first-of-type::first-letter{font-size:48px}
  .blog-cta{padding:0 20px 64px}
  .blog-cta-card{padding:32px 24px}
  .blog-cta-card h3{font-size:22px}
}