:root{
  --navy:#0B3D66;
  --blue:#1E73C7;
  --sky:#3FA0E8;
  --pale:#EAF4FC;
  --gold:#E0A640;
  --ink:#16263A;
  --slate:#5A7184;
  --white:#FFFFFF;
  --line:#D7E7F6;
  --maxw:1140px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Sarabun',sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-family:'Kanit',sans-serif;margin:0;color:var(--navy);}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:'Kanit',sans-serif;font-weight:600;font-size:13px;
  letter-spacing:.12em;color:var(--blue);text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--gold);display:inline-block;}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:'Kanit',sans-serif;font-weight:600;font-size:15px;
  padding:13px 28px;border-radius:6px;
  transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
  border:1.5px solid transparent;
}
.btn-primary{background:var(--navy);color:#fff;box-shadow:0 8px 20px -8px rgba(11,61,102,.55);}
.btn-primary:hover{background:var(--blue);transform:translateY(-2px);}
.btn-ghost{border-color:var(--navy);color:var(--navy);}
.btn-ghost:hover{background:var(--navy);color:#fff;transform:translateY(-2px);}

/* === Header === */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;}
.brand{display:flex;align-items:center;gap:14px;}
.brand-logo{height:42px;width:auto;display:block;}
.brand-mark{
  width:42px;height:42px;border-radius:9px;
  background:linear-gradient(135deg,var(--navy),var(--blue));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-family:'Kanit',sans-serif;font-weight:800;font-size:18px;flex-shrink:0;
}
.brand-text{line-height:1.25;}
.brand-text strong{display:block;font-family:'Kanit',sans-serif;font-weight:700;font-size:16px;color:var(--navy);}
.brand-text span{display:block;font-size:12px;color:var(--slate);letter-spacing:.04em;}
nav.links{display:flex;gap:34px;font-family:'Kanit',sans-serif;font-size:15px;font-weight:500;color:var(--ink);}
nav.links a{position:relative;padding:6px 0;}
nav.links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--gold);transition:width .25s ease;}
nav.links a:hover::after, nav.links a.active::after{width:100%;}
nav.links a.active{color:var(--blue);}
.nav-cta{display:flex;align-items:center;gap:14px;}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px;}
.hamburger span{width:24px;height:2.5px;background:var(--navy);border-radius:2px;}

/* === Page header banner (subpages) === */
.page-banner{
  background:linear-gradient(180deg,var(--pale) 0%, #fff 100%);
  padding:54px 0 40px;position:relative;overflow:hidden;
}
.page-banner .ledger-bg{
  position:absolute;inset:0;z-index:0;
  background-image:repeating-linear-gradient(to bottom, transparent 0, transparent 39px, rgba(30,115,199,.07) 40px);
  mask-image:linear-gradient(to bottom, transparent, black 15%, black 70%, transparent);
}
.breadcrumb{position:relative;z-index:1;font-family:'Kanit',sans-serif;font-size:13px;color:var(--slate);margin-bottom:14px;}
.breadcrumb a{color:var(--blue);}
.page-banner h1{position:relative;z-index:1;font-size:clamp(28px,3.6vw,42px);font-weight:800;}
.page-banner p{position:relative;z-index:1;color:var(--slate);max-width:600px;margin-top:14px;font-size:16px;}
.banner-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;}
.banner-photo{border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:0 25px 50px -25px rgba(11,61,102,.35);aspect-ratio:4/3;}
.banner-photo img{width:100%;height:100%;object-fit:cover;display:block;}
@media (max-width:920px){
  .banner-grid{grid-template-columns:1fr;}
  .banner-photo{order:-1;max-width:420px;margin:0 auto;aspect-ratio:16/9;}
}

/* === Hero (home only) === */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,var(--pale) 0%, #fff 78%);padding:88px 0 70px;}
.ledger-bg{position:absolute;inset:0;z-index:0;background-image:repeating-linear-gradient(to bottom, transparent 0, transparent 39px, rgba(30,115,199,.07) 40px);mask-image:linear-gradient(to bottom, transparent, black 15%, black 70%, transparent);}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;}
.hero h1{font-size:clamp(32px,4.2vw,52px);font-weight:800;line-height:1.28;letter-spacing:-.01em;}
.hero h1 .accent{color:var(--blue);}
.hero p.lead{margin-top:20px;font-size:17px;color:var(--slate);max-width:520px;}
.hero-ctas{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;}
.hero-stats{display:flex;gap:30px;margin-top:46px;}
.hero-stats div strong{display:block;font-family:'Kanit',sans-serif;font-size:26px;font-weight:700;color:var(--navy);}
.hero-stats div span{font-size:13px;color:var(--slate);}
.hero-visual{position:relative;}
.ledger-card{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 30px 60px -25px rgba(11,61,102,.35);padding:30px 28px;position:relative;}
.ledger-card .tag{display:inline-block;background:var(--pale);color:var(--blue);font-family:'Kanit',sans-serif;font-size:12px;font-weight:600;padding:5px 12px;border-radius:20px;margin-bottom:18px;}
.ledger-row{display:flex;justify-content:space-between;align-items:baseline;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;}
.ledger-row:last-child{border-bottom:none;}
.ledger-row span:first-child{color:var(--slate);}
.ledger-row span:last-child{font-family:'Kanit',sans-serif;font-weight:600;color:var(--navy);}
.ledger-total{margin-top:16px;padding-top:16px;border-top:2px solid var(--navy);display:flex;justify-content:space-between;align-items:baseline;}
.ledger-total span:first-child{font-family:'Kanit',sans-serif;font-weight:700;color:var(--navy);}
.ledger-total span:last-child{font-family:'Kanit',sans-serif;font-weight:800;font-size:22px;color:var(--gold);}
.float-badge{position:absolute;bottom:-20px;right:-18px;background:var(--navy);color:#fff;border-radius:12px;padding:14px 18px;box-shadow:0 14px 30px -10px rgba(11,61,102,.6);font-family:'Kanit',sans-serif;}
.float-badge strong{display:block;font-size:18px;}
.float-badge span{font-size:11px;opacity:.8;}

/* === Section generic === */
section{padding:84px 0;}
.section-head{max-width:680px;margin-bottom:50px;}
.section-head h2{font-size:clamp(26px,3vw,36px);font-weight:700;line-height:1.35;margin-top:6px;}
.section-head p{margin-top:14px;color:var(--slate);font-size:16px;}
.bg-pale{background:var(--pale);}

/* === Services (cards, home preview) === */
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.service-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:32px 26px;transition:transform .25s ease, box-shadow .25s ease, border-color .25s ease;}
.service-card:hover{transform:translateY(-6px);box-shadow:0 20px 40px -22px rgba(11,61,102,.4);border-color:var(--sky);}
.service-icon{width:50px;height:50px;border-radius:12px;background:var(--pale);display:flex;align-items:center;justify-content:center;margin-bottom:18px;color:var(--blue);}
.service-card h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.service-card p{font-size:14.5px;color:var(--slate);margin:0;}
.service-card a.more{display:inline-block;margin-top:14px;font-family:'Kanit',sans-serif;font-size:13px;font-weight:600;color:var(--blue);}

/* === Service detail blocks (services.html) === */
.service-detail{
  display:grid;grid-template-columns:.85fr 1.15fr;gap:46px;align-items:start;
  padding:48px 0;border-bottom:1px solid var(--line);
}
.service-detail:last-child{border-bottom:none;}
.service-detail .num{font-family:'Kanit',sans-serif;font-size:14px;font-weight:700;color:var(--gold);letter-spacing:.08em;margin-bottom:10px;display:block;}
.service-detail h3{font-size:22px;font-weight:700;line-height:1.4;}
.service-detail .visual{
  background:var(--pale);border-radius:16px;min-height:160px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;color:var(--blue);
}
.service-detail .visual img{width:100%;height:100%;min-height:160px;object-fit:cover;display:block;}
.detail-list{margin:18px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:12px;}
.detail-list li{display:flex;gap:10px;font-size:15px;color:var(--ink);}
.detail-list li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--blue);margin-top:8px;flex-shrink:0;}

/* === About / Mission === */
.about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:start;}
.about-list{margin-top:26px;display:flex;flex-direction:column;gap:18px;}
.about-item{display:flex;gap:14px;align-items:flex-start;}
.about-item .dot{width:8px;height:8px;border-radius:50%;background:var(--gold);margin-top:9px;flex-shrink:0;}
.about-item p{margin:0;color:var(--ink);font-size:15px;}
.about-item strong{color:var(--navy);font-family:'Kanit',sans-serif;}
blockquote{margin:0;padding:30px 32px;background:var(--navy);color:#fff;border-radius:16px;font-family:'Kanit',sans-serif;font-size:18px;font-weight:400;line-height:1.7;position:relative;}
blockquote::before{content:"\201C";font-size:60px;color:var(--gold);position:absolute;top:-6px;left:18px;font-family:Georgia,serif;}
blockquote p{padding-left:26px;}
blockquote footer{margin-top:18px;padding-left:26px;font-size:13px;color:#9DC0E2;font-family:'Sarabun',sans-serif;}

.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:10px;}
.value-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;}
.value-card h4{font-size:17px;font-weight:600;margin-bottom:8px;}
.value-card p{font-size:14.5px;color:var(--slate);margin:0;}

.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.team-card{text-align:center;}
.team-photo{
  width:100%;aspect-ratio:1;border-radius:14px;background:linear-gradient(135deg,var(--navy),var(--sky));
  display:flex;align-items:center;justify-content:center;color:#fff;font-family:'Kanit',sans-serif;font-weight:700;font-size:26px;margin-bottom:12px;
}
.team-card h4{font-size:15px;font-weight:600;}
.team-card span{font-size:13px;color:var(--slate);}

/* === Clients strip === */
.clients-strip{display:flex;justify-content:space-between;flex-wrap:wrap;gap:18px;padding:30px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.client-pill{font-family:'Kanit',sans-serif;font-size:13px;color:var(--slate);padding:9px 18px;border:1px solid var(--line);border-radius:30px;}

/* === Articles === */
.article-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.article-card{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;transition:transform .25s ease, box-shadow .25s ease;display:flex;flex-direction:column;}
.article-card:hover{transform:translateY(-5px);box-shadow:0 18px 36px -20px rgba(11,61,102,.35);}
.article-thumb{height:130px;background:linear-gradient(135deg,var(--navy),var(--sky));display:flex;align-items:center;justify-content:center;color:#fff;font-family:'Kanit',sans-serif;font-weight:700;font-size:13px;letter-spacing:.05em;text-align:center;padding:0 14px;position:relative;overflow:hidden;}
.article-thumb img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;}
.article-thumb span.label{position:relative;z-index:1;background:rgba(11,61,102,.55);padding:5px 12px;border-radius:18px;}
.article-body{padding:20px;flex:1;display:flex;flex-direction:column;}
.article-body h4{font-size:15.5px;font-weight:600;line-height:1.5;margin-bottom:10px;}
.article-body p{font-size:13.5px;color:var(--slate);flex:1;margin:0 0 14px;}
.article-body a.more{font-family:'Kanit',sans-serif;font-size:13px;font-weight:600;color:var(--blue);}
.article-meta{font-size:12px;color:var(--slate);margin-bottom:8px;font-family:'Kanit',sans-serif;}

/* article single page */
.article-single{max-width:760px;margin:0 auto;}
.article-single .article-thumb{height:280px;border-radius:14px;font-size:16px;margin-bottom:30px;}
.article-single h1{font-size:clamp(26px,3.4vw,38px);margin-bottom:10px;}
.article-single .meta{font-family:'Kanit',sans-serif;font-size:13px;color:var(--slate);margin-bottom:28px;}
.article-single p{font-size:16px;color:var(--ink);margin:0 0 20px;}
.article-single h2{font-size:21px;margin:34px 0 14px;}
.article-single ul{padding-left:20px;color:var(--ink);font-size:16px;}
.article-single ul li{margin-bottom:8px;}

/* === Activities (กิจกรรม) === */
.activity-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.activity-card{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;}
.activity-thumb{height:170px;background:linear-gradient(135deg,var(--sky),var(--navy));display:flex;align-items:center;justify-content:center;color:#fff;font-family:'Kanit',sans-serif;font-weight:700;position:relative;overflow:hidden;}
.activity-thumb img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;}
.activity-thumb span.label{position:relative;z-index:1;background:rgba(11,61,102,.55);padding:6px 14px;border-radius:20px;font-size:13px;}
.activity-card{transition:box-shadow .2s ease,transform .2s ease;}
a.activity-card-link{display:block;text-decoration:none;color:inherit;}
a.activity-card-link:hover .activity-card{box-shadow:0 10px 24px rgba(11,61,102,.14);transform:translateY(-2px);}

/* === Activity detail + photo gallery === */
.activity-single{max-width:900px;margin:0 auto;}
.activity-single .activity-thumb{height:320px;border-radius:14px;margin-bottom:30px;}
.activity-single h1{font-size:clamp(26px,3.4vw,38px);margin-bottom:10px;}
.activity-single .meta{font-family:'Kanit',sans-serif;font-size:13px;color:var(--slate);margin-bottom:28px;}
.activity-single p.desc{font-size:16px;color:var(--ink);margin:0 0 20px;}
.photo-gallery-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:16px;}
.photo-gallery-item{border-radius:10px;overflow:hidden;height:150px;cursor:pointer;background:var(--line);}
.photo-gallery-item img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .25s ease;}
.photo-gallery-item:hover img{transform:scale(1.06);}
.gallery-lightbox{display:none;position:fixed;inset:0;background:rgba(10,20,30,.9);z-index:999;align-items:center;justify-content:center;padding:30px;}
.gallery-lightbox.open{display:flex;}
.gallery-lightbox img{max-width:90vw;max-height:85vh;border-radius:8px;}
.gallery-lightbox .lightbox-close{position:absolute;top:22px;right:30px;color:#fff;font-size:34px;line-height:1;cursor:pointer;background:none;border:none;}
.gallery-lightbox .lightbox-prev,.gallery-lightbox .lightbox-next{position:absolute;top:50%;transform:translateY(-50%);color:#fff;font-size:40px;cursor:pointer;background:none;border:none;padding:10px;}
.gallery-lightbox .lightbox-prev{left:14px;}
.gallery-lightbox .lightbox-next{right:14px;}
.gallery-lightbox .lightbox-counter{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);color:#fff;font-family:'Kanit',sans-serif;font-size:14px;background:rgba(255,255,255,.15);padding:5px 16px;border-radius:16px;}
@media(max-width:900px){.photo-gallery-grid{grid-template-columns:repeat(3,1fr);}}
@media(max-width:640px){.photo-gallery-grid{grid-template-columns:repeat(2,1fr);}}
.activity-body{padding:20px;}
.activity-body .date{font-family:'Kanit',sans-serif;font-size:12px;color:var(--gold);font-weight:600;margin-bottom:6px;}
.activity-body h4{font-size:16px;font-weight:600;margin-bottom:8px;}
.activity-body p{font-size:13.5px;color:var(--slate);margin:0;}

/* === CTA band === */
.cta-band{background:linear-gradient(135deg,var(--navy),var(--blue));border-radius:22px;padding:50px 48px;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap;color:#fff;}
.cta-band h3{color:#fff;font-size:24px;font-weight:700;}
.cta-band p{margin:8px 0 0;color:#CFE3F5;font-size:14.5px;}
.cta-band .btn-primary{background:var(--gold);box-shadow:none;}
.cta-band .btn-primary:hover{background:#EFB95C;}

/* === Contact === */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:50px;}
.contact-item{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line);}
.contact-item:last-child{border-bottom:none;}
.contact-icon{width:42px;height:42px;border-radius:10px;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.contact-item h4{font-size:14px;color:var(--slate);font-weight:500;margin-bottom:4px;font-family:'Sarabun',sans-serif;}
.contact-item p, .contact-item a{font-family:'Kanit',sans-serif;font-weight:600;font-size:15.5px;color:var(--navy);}
.map-frame{border-radius:16px;overflow:hidden;border:1px solid var(--line);height:100%;min-height:340px;}
.map-frame iframe{width:100%;height:100%;min-height:340px;border:0;display:block;}
.contact-form{display:flex;flex-direction:column;gap:16px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px;}
.contact-form label{font-family:'Kanit',sans-serif;font-size:13.5px;font-weight:600;color:var(--navy);margin-bottom:6px;display:block;}
.contact-form input, .contact-form textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:8px;font-family:'Sarabun',sans-serif;font-size:14.5px;background:var(--pale);
}
.contact-form input:focus, .contact-form textarea:focus{outline:2px solid var(--sky);background:#fff;}

/* === Footer === */
footer{background:var(--navy);color:#CFE3F5;padding:54px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;}
.footer-brand p{font-size:13.5px;color:#9DC0E2;margin-top:14px;max-width:320px;}
footer h5{color:#fff;font-family:'Kanit',sans-serif;font-size:15px;margin-bottom:16px;}
footer ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px;}
footer a{font-size:14px;color:#CFE3F5;}
footer a:hover{color:#fff;}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#8FB3D6;text-align:center;}

/* === LINE float button === */
.float-line{
  position:fixed;bottom:26px;right:26px;z-index:60;background:#06C755;color:#fff;border-radius:50px;
  display:flex;align-items:center;gap:8px;padding:13px 20px;font-family:'Kanit',sans-serif;font-weight:600;font-size:14px;
  box-shadow:0 14px 30px -8px rgba(6,199,85,.55);transition:transform .2s ease;
}
.float-line:hover{transform:translateY(-3px);}

/* === Reveal animation === */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease, transform .7s ease;}
.reveal.show{opacity:1;transform:translateY(0);}

@media (max-width:920px){
  nav.links{display:none;}
  .hamburger{display:flex;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-visual{order:-1;max-width:380px;margin:0 auto;}
  .about-grid, .contact-grid{grid-template-columns:1fr;}
  .service-grid{grid-template-columns:repeat(2,1fr);}
  .article-grid{grid-template-columns:repeat(2,1fr);}
  .activity-grid{grid-template-columns:repeat(2,1fr);}
  .value-grid{grid-template-columns:1fr;}
  .team-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;text-align:center;}
  .service-detail{grid-template-columns:1fr;}
  .service-detail .visual{order:-1;min-height:120px;}
}
@media (max-width:560px){
  .service-grid, .article-grid, .activity-grid, .team-grid{grid-template-columns:1fr;}
  .hero-stats{gap:20px;flex-wrap:wrap;}
  .cta-band{padding:36px 28px;}
  section{padding:64px 0;}
}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{scroll-behavior:auto !important;}
}