:root{
  --white:#FFFFFF;
  --panel:#F4F6F9;
  --panel2:#EBEFF4;
  --navy:#0E2E5C;
  --navy-deep:#081E3F;
  --red:#C8102E;
  --red-dark:#A50D26;
  --ink:#1C2733;
  --muted:#5A6675;
  --line:#D9DFE7;
  --gold:#B98A2F;
  --radius:10px;
  --shadow:0 10px 30px rgba(8,30,63,.10);
  --font-display:'IBM Plex Sans Thai',sans-serif;
  --font-body:'Sarabun',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);color:var(--ink);background:var(--white);font-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.35;color:var(--navy-deep)}
.container{width:min(1180px,92%);margin:0 auto}
.eyebrow{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--font-display);font-weight:600;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;color:var(--red)}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--red)}
.section{padding:4.5rem 0}
.section.alt{background:var(--panel)}
.section-head{max-width:760px;margin-bottom:2.4rem}
.section-head h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700;margin:.5rem 0 .7rem}
.section-head p{color:var(--muted)}
.btn{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--font-display);font-weight:600;font-size:.95rem;padding:.8rem 1.5rem;border-radius:6px;border:2px solid transparent;cursor:pointer;transition:all .2s}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-deep)}
.btn-outline{border-color:var(--navy);color:var(--navy);background:transparent}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn-white{background:#fff;color:var(--navy)}
.btn-white:hover{background:var(--panel2)}
.btn-line{background:#06C755;color:#fff}
.btn-line:hover{background:#05a648}

/* ---------- top utility bar ---------- */
.topbar{background:var(--navy-deep);color:#C7D3E4;font-size:.83rem}
.topbar .container{display:flex;justify-content:space-between;align-items:center;min-height:38px;gap:1rem}
.topbar strong{color:#fff;font-weight:600}
.topbar .tb-right{display:flex;gap:1.4rem}
.topbar a:hover{color:#fff}
@media(max-width:720px){.topbar .tb-left{display:none}.topbar .container{justify-content:center}}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 12px rgba(8,30,63,.06)}
.nav .container{display:flex;align-items:center;justify-content:space-between;min-height:76px;gap:1rem}
.brand{display:flex;align-items:center;gap:.75rem}
.brand-mark{width:46px;height:46px;flex:0 0 auto}
.brand-text{line-height:1.2}
.brand-text .b1{font-family:var(--font-display);font-weight:700;font-size:1.08rem;color:var(--navy-deep)}
.brand-text .b2{font-size:.72rem;color:var(--muted);letter-spacing:.06em}
.nav-links{display:flex;gap:.2rem}
.nav-links a{font-family:var(--font-display);font-weight:500;font-size:.93rem;padding:.55rem .8rem;border-radius:6px;color:var(--ink)}
.nav-links a:hover{color:var(--red)}
.nav-links a.active{color:var(--red);background:#FBECEE}
.nav-cta{display:flex;gap:.5rem}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:.45rem .6rem;font-size:1.1rem;cursor:pointer;color:var(--navy)}
@media(max-width:1020px){
  .nav-links{position:fixed;inset:76px 0 auto 0;background:#fff;flex-direction:column;padding:1rem 4%;border-bottom:1px solid var(--line);display:none;box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .nav-cta{display:none}
}

/* ---------- breadcrumb ---------- */
.crumbbar{background:var(--panel);border-bottom:1px solid var(--line)}
.crumbbar .container{display:flex;align-items:center;min-height:44px;font-size:.85rem;color:var(--muted);gap:.5rem;flex-wrap:wrap}
.crumbbar a{color:var(--navy);font-weight:500}
.crumbbar a:hover{color:var(--red)}
.crumbbar .sep{color:#AAB4C0}

/* ---------- page header ---------- */
.page-head{background:linear-gradient(120deg,var(--navy-deep) 0%,var(--navy) 70%);color:#fff;padding:3.4rem 0;position:relative;overflow:hidden}
.page-head h1{color:#fff;font-size:clamp(1.6rem,3.4vw,2.3rem);font-weight:700;max-width:820px}
.page-head p{color:#C7D3E4;max-width:720px;margin-top:.7rem}
.page-head::after{content:"";position:absolute;right:-60px;top:-60px;width:340px;height:340px;border:2px dashed rgba(255,255,255,.14);border-radius:50%;pointer-events:none}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:
  linear-gradient(rgba(255,255,255,.0),rgba(255,255,255,.0)),
  repeating-linear-gradient(0deg,transparent,transparent 47px,rgba(14,46,92,.05) 48px),
  repeating-linear-gradient(90deg,transparent,transparent 47px,rgba(14,46,92,.05) 48px),#fff}
.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:3rem;align-items:center;padding:4.2rem 0 4.6rem}
.hero-badge{display:inline-flex;align-items:center;gap:.5rem;background:#FBECEE;color:var(--red);border:1px solid #F2C9D0;font-family:var(--font-display);font-weight:600;font-size:.82rem;padding:.35rem .9rem;border-radius:999px;margin-bottom:1.1rem}
.hero h1{font-size:clamp(1.85rem,4vw,2.8rem);font-weight:700;letter-spacing:-.01em}
.hero h1 .hl{color:var(--red)}
.hero .sub{margin:1.1rem 0 1.7rem;color:var(--muted);font-size:1.05rem;max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:.7rem;margin-bottom:2rem}
.hero-stats{display:flex;gap:2.2rem;border-top:1px solid var(--line);padding-top:1.4rem;flex-wrap:wrap}
.hero-stats .st b{font-family:var(--font-display);font-size:1.45rem;color:var(--navy);display:block;line-height:1.2}
.hero-stats .st span{font-size:.82rem;color:var(--muted)}
.hero-diagram{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.2rem 1.2rem 1rem;position:relative}
.hero-diagram .dg-title{display:flex;justify-content:space-between;align-items:center;font-family:var(--font-display);font-size:.8rem;font-weight:600;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:.6rem}
.hero-diagram .dg-title i{font-style:normal;color:var(--red)}
.bore-dash{stroke-dasharray:8 7;animation:bore 2.6s linear infinite}
@keyframes bore{to{stroke-dashoffset:-30}}
@media(prefers-reduced-motion:reduce){.bore-dash{animation:none}}
@media(max-width:920px){.hero .container{grid-template-columns:1fr;padding:3rem 0}}

/* ---------- highlights ---------- */
.hl-strip{background:var(--navy);color:#fff;position:relative}
.hl-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.hl-item{padding:1.8rem 1.6rem;border-left:1px solid rgba(255,255,255,.12)}
.hl-item:first-child{border-left:none}
.hl-item .ic{width:42px;height:42px;margin-bottom:.8rem}
.hl-item h3{color:#fff;font-size:1rem;font-weight:600;margin-bottom:.3rem}
.hl-item p{color:#B9C6DA;font-size:.87rem;line-height:1.6}
@media(max-width:920px){.hl-grid{grid-template-columns:1fr 1fr}.hl-item{border-top:1px solid rgba(255,255,255,.12)}}
@media(max-width:560px){.hl-grid{grid-template-columns:1fr}}

/* ---------- cards & grids ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem}
@media(max-width:920px){.grid-3{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.grid-3,.grid-2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:box-shadow .2s,transform .2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card .card-img{aspect-ratio:16/9;position:relative;overflow:hidden}
.card .card-body{padding:1.3rem 1.4rem 1.5rem}
.card h3{font-size:1.05rem;font-weight:600;margin-bottom:.45rem}
.card p{font-size:.92rem;color:var(--muted)}
.card .more{display:inline-flex;align-items:center;gap:.35rem;margin-top:.8rem;font-family:var(--font-display);font-weight:600;font-size:.88rem;color:var(--red)}
.tag{display:inline-block;font-family:var(--font-display);font-size:.72rem;font-weight:600;letter-spacing:.05em;background:var(--panel2);color:var(--navy);padding:.2rem .65rem;border-radius:4px;margin-bottom:.55rem}
.tag.red{background:#FBECEE;color:var(--red)}

/* illustrated placeholder "photos" */
.ph{width:100%;height:100%;object-fit:cover}

/* ---------- about preview ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.about-grid ul.checks{margin-top:1.1rem}
ul.checks li{position:relative;padding-left:1.9rem;margin-bottom:.55rem;color:var(--ink)}
ul.checks li::before{content:"";position:absolute;left:0;top:.42rem;width:18px;height:18px;border-radius:50%;background:var(--red);
  -webkit-mask:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="black" d="M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z"/></svg>') center/contain no-repeat;
  mask:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path fill="black" d="M9 16.2 4.8 12l-1.4 1.4L9 19 21 7l-1.4-1.4z"/></svg>') center/contain no-repeat}
@media(max-width:920px){.about-grid{grid-template-columns:1fr;gap:2rem}}

/* ---------- product highlight ---------- */
.prod-hl{background:linear-gradient(120deg,var(--navy-deep),var(--navy));color:#fff;border-radius:14px;overflow:hidden;display:grid;grid-template-columns:1.1fr .9fr}
.prod-hl .txt{padding:3rem 3rem 3rem 3.2rem}
.prod-hl h2{color:#fff;font-size:clamp(1.4rem,2.6vw,1.9rem);margin:.5rem 0 .9rem}
.prod-hl p{color:#C7D3E4}
.prod-hl .fig{position:relative;min-height:320px;background:#0A2348;display:flex;align-items:center;justify-content:center;padding:2rem}
.prod-hl .cta-row{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.5rem}
.prod-hl ul.checks li{color:#E4EAF3}
.prod-hl ul.checks li::before{background:#FF6B7E}
@media(max-width:920px){.prod-hl{grid-template-columns:1fr}.prod-hl .txt{padding:2.2rem 1.6rem}}

/* ---------- why us ---------- */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem}
.why-item{background:#fff;border:1px solid var(--line);border-top:4px solid var(--red);border-radius:8px;padding:1.5rem 1.4rem}
.why-item h3{font-size:1rem;margin:.7rem 0 .4rem}
.why-item p{font-size:.88rem;color:var(--muted)}
.why-item .n{font-family:var(--font-display);font-weight:700;color:var(--panel2);font-size:2rem;line-height:1;-webkit-text-stroke:1px var(--navy);color:transparent}
@media(max-width:920px){.why-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.why-grid{grid-template-columns:1fr}}

/* ---------- area ---------- */
.area-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:3rem;align-items:center}
.area-chips{display:flex;flex-wrap:wrap;gap:.55rem;margin-top:1.2rem}
.area-chips span{background:#fff;border:1px solid var(--line);border-radius:999px;padding:.35rem 1rem;font-size:.88rem;font-family:var(--font-display);font-weight:500;color:var(--navy)}
.area-chips span.hot{background:var(--navy);color:#fff;border-color:var(--navy)}
@media(max-width:920px){.area-wrap{grid-template-columns:1fr}}

/* ---------- SEO content ---------- */
.seo-cols{columns:2;column-gap:3rem;color:var(--muted);font-size:.95rem}
.seo-cols h3{font-size:1.02rem;margin:0 0 .5rem;break-after:avoid}
.seo-cols p{margin-bottom:1.2rem}
.seo-cols strong{color:var(--ink)}
@media(max-width:820px){.seo-cols{columns:1}}

/* ---------- table ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table.spec{width:100%;border-collapse:collapse;font-size:.9rem;min-width:640px}
table.spec th{background:var(--navy);color:#fff;font-family:var(--font-display);font-weight:600;padding:.75rem .9rem;text-align:left;white-space:nowrap}
table.spec td{padding:.65rem .9rem;border-top:1px solid var(--line)}
table.spec tr:nth-child(even) td{background:var(--panel)}
table.spec td:first-child{font-weight:600;color:var(--navy)}

/* ---------- portfolio ---------- */
.pf-filters{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.8rem}
.pf-filters button{font-family:var(--font-display);font-weight:500;font-size:.86rem;padding:.45rem 1.05rem;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer;transition:all .15s}
.pf-filters button:hover{border-color:var(--navy);color:var(--navy)}
.pf-filters button.on{background:var(--navy);border-color:var(--navy);color:#fff}
.pf-meta{display:flex;flex-wrap:wrap;gap:.9rem;font-size:.8rem;color:var(--muted);margin-top:.6rem}
.pf-meta b{color:var(--navy);font-weight:600}

/* ---------- news ---------- */
.news-card time{font-size:.78rem;color:var(--muted);font-family:var(--font-display);letter-spacing:.04em}
article.news-full{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem 1.7rem;margin-bottom:1.2rem}
article.news-full h3{font-size:1.15rem;margin-bottom:.5rem}
article.news-full p{color:var(--muted);font-size:.95rem}
article.news-full .body{display:none;margin-top:.9rem;border-top:1px dashed var(--line);padding-top:.9rem}
article.news-full.open .body{display:block}
article.news-full .body h4{font-size:.98rem;margin:.9rem 0 .3rem}
.readmore{margin-top:.7rem;background:none;border:none;color:var(--red);font-family:var(--font-display);font-weight:600;font-size:.9rem;cursor:pointer;padding:0}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:2.6rem;align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow)}
.form-card h3{font-size:1.2rem;margin-bottom:.3rem}
.form-card .sub{color:var(--muted);font-size:.9rem;margin-bottom:1.4rem}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.f-group{margin-bottom:1rem}
.f-group label{display:block;font-family:var(--font-display);font-weight:600;font-size:.85rem;margin-bottom:.35rem;color:var(--navy-deep)}
.f-group label em{color:var(--red);font-style:normal}
.f-group input,.f-group select,.f-group textarea{width:100%;font-family:var(--font-body);font-size:.95rem;padding:.7rem .85rem;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink)}
.f-group input:focus,.f-group select:focus,.f-group textarea:focus{outline:2px solid var(--navy);outline-offset:1px;border-color:var(--navy)}
.f-file{border:2px dashed var(--line);border-radius:8px;padding:1.1rem;text-align:center;font-size:.88rem;color:var(--muted);cursor:pointer;transition:border-color .2s}
.f-file:hover{border-color:var(--navy)}
.contact-side .c-item{display:flex;gap:1rem;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.15rem 1.25rem;margin-bottom:.9rem;align-items:center}
.contact-side .c-item .ic{width:44px;height:44px;flex:0 0 auto;border-radius:8px;background:var(--panel2);display:flex;align-items:center;justify-content:center}
.contact-side .c-item b{font-family:var(--font-display);display:block;font-size:.92rem;color:var(--navy-deep)}
.contact-side .c-item span{font-size:.86rem;color:var(--muted)}
.quick-btns{display:grid;grid-template-columns:1fr 1fr;gap:.7rem;margin-top:1.1rem}
.quick-btns .btn{justify-content:center}
@media(max-width:920px){.contact-grid{grid-template-columns:1fr}.f-row{grid-template-columns:1fr}}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(100deg,var(--red),#8F0B21);color:#fff;border-radius:14px;padding:2.6rem 3rem;display:flex;justify-content:space-between;align-items:center;gap:2rem;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:clamp(1.3rem,2.4vw,1.7rem)}
.cta-band p{color:#FBD9DF;font-size:.95rem;margin-top:.3rem}
.cta-band .btns{display:flex;gap:.7rem;flex-wrap:wrap}

/* ---------- footer ---------- */
footer{background:var(--navy-deep);color:#B9C6DA;margin-top:4.5rem}
.ft-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1.1fr;gap:2.4rem;padding:3.4rem 0 2.4rem}
.ft-grid h4{color:#fff;font-size:.98rem;margin-bottom:1rem}
.ft-grid li{margin-bottom:.5rem;font-size:.88rem}
.ft-grid a:hover{color:#fff;text-decoration:underline}
.ft-brand p{font-size:.88rem;margin-top:.9rem;max-width:320px}
.ft-bottom{border-top:1px solid rgba(255,255,255,.12);padding:1.2rem 0;font-size:.8rem;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.ft-kw{font-size:.78rem;color:#7E90AB;padding-bottom:1.6rem}
@media(max-width:920px){.ft-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.ft-grid{grid-template-columns:1fr}}

/* ---------- sticky FABs ---------- */
.fabs{position:fixed;right:18px;bottom:18px;display:flex;flex-direction:column;gap:.7rem;z-index:90}
.fab{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(8,30,63,.28);transition:transform .15s}
.fab:hover{transform:scale(1.07)}
.fab.call{background:var(--red)}
.fab.line{background:#06C755}
.fab svg{width:26px;height:26px}
.fab .lbl{position:absolute;right:66px;background:var(--navy-deep);color:#fff;font-family:var(--font-display);font-size:.75rem;font-weight:500;padding:.3rem .7rem;border-radius:6px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .15s}
.fab:hover .lbl{opacity:1}

/* ---------- FAQ (AEO) ---------- */
.faq-list{max-width:860px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:8px;margin-bottom:.7rem;overflow:hidden}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:1rem;background:none;border:none;text-align:left;cursor:pointer;padding:1.05rem 1.3rem;font-family:var(--font-display);font-weight:600;font-size:1rem;color:var(--navy-deep)}
.faq-q:hover{color:var(--red)}
.faq-q .mark{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--panel2);color:var(--navy);display:flex;align-items:center;justify-content:center;font-size:1rem;transition:transform .2s}
.faq-item.open .faq-q .mark{transform:rotate(45deg);background:var(--red);color:#fff}
.faq-a{display:none;padding:0 1.3rem 1.15rem;color:var(--muted);font-size:.95rem;border-top:1px dashed var(--line);padding-top:.9rem;margin:0 0 0}
.faq-item.open .faq-a{display:block}

/* ---------- pages ---------- */
.page{display:block;animation:fadein .35s ease}
@keyframes fadein{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.page.current{animation:none}}
:focus-visible{outline:3px solid var(--red);outline-offset:2px}