:root{
  --navy:#0a1733; --navy2:#11224d; --blue:#1f5fe0; --blue-d:#1747b0; --ink:#16203a;
  --muted:#5c6b8a; --line:#e3e8f2; --bg:#f6f8fc; --radius:14px;
  --shadow:0 2px 12px rgba(16,38,76,.08); --shadow-lg:0 18px 55px rgba(16,38,76,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Inter","Noto Sans Thai",-apple-system,Segoe UI,sans-serif;color:var(--ink);background:#fff;line-height:1.55}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14px;padding:12px 22px;border-radius:9px;border:1.5px solid transparent;cursor:pointer;transition:.18s}
.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-d)}
.btn-ghost{background:rgba(255,255,255,.10);color:#fff;border-color:rgba(255,255,255,.55);backdrop-filter:blur(4px)}
.btn-ghost:hover{background:#fff;color:var(--navy)}
.btn-outline{background:#fff;color:var(--blue);border-color:var(--line)}.btn-outline:hover{border-color:var(--blue)}
.link-arrow{color:var(--blue);font-weight:600;font-size:14px}

/* header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .25s,box-shadow .25s}
.site-header.solid{background:rgba(10,23,51,.95);box-shadow:0 1px 0 rgba(255,255,255,.06)}
.nav{display:flex;align-items:center;gap:30px;height:66px}
.logo img{height:24px;width:auto}
.nav-links{display:flex;gap:24px;margin-left:8px;font-size:13.5px;font-weight:500;color:#fff}
.nav-links a{opacity:.82}.nav-links a:hover{opacity:1}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:16px;color:#fff}
.nav-right .ico{font-size:20px;opacity:.85}
.login-btn{font-size:13.5px;font-weight:600;border:1.5px solid rgba(255,255,255,.5);padding:7px 18px;border-radius:8px}
.login-btn:hover{background:#fff;color:var(--navy)}
@media(max-width:880px){.nav-links{display:none}}

/* hero */
.hero{position:relative;min-height:720px;display:flex;align-items:center;overflow:hidden;color:#fff}
.hero-photo{position:absolute;inset:0;background:#0a1733 center/cover no-repeat;transform:scale(1.03);transition:opacity .4s}
.hero-scrim{position:absolute;inset:0;background:
  linear-gradient(90deg,rgba(8,18,42,.92) 0%,rgba(8,18,42,.55) 42%,rgba(8,18,42,.15) 72%,transparent 100%),
  linear-gradient(0deg,rgba(8,18,42,.85) 0%,transparent 38%)}
.hero-inner{position:relative;z-index:2;width:100%;padding:120px 0 70px}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2.5px;color:#7fb0ff;margin-bottom:16px}
.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.04;font-weight:900;letter-spacing:-1px;max-width:680px}
.hero p{margin:20px 0 28px;font-size:18px;opacity:.86;max-width:470px}

/* solution search bar */
.solbar{margin-top:42px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:8px;display:flex;gap:4px;flex-wrap:wrap;max-width:1000px}
.sol-field{flex:1;min-width:150px;display:flex;flex-direction:column;padding:10px 16px;border-right:1px solid var(--line)}
.sol-field:last-of-type{border-right:none}
.sol-label{font-size:11px;color:var(--muted);font-weight:700;letter-spacing:.3px;margin-bottom:3px}
.solbar input{border:none;outline:none;font:500 14px inherit;color:var(--ink);background:transparent}
.solbar input::placeholder{color:#9aa7c0}
.solbar .btn{align-self:stretch;padding:0 26px}
@media(max-width:760px){.sol-field{border-right:none;min-width:46%}}

/* full-width photo category bands */
.cats{background:var(--navy)}
.catband{position:relative;display:block;min-height:215px;color:#fff;background-size:cover;background-position:center;overflow:hidden;
  border-bottom:1px solid rgba(255,255,255,.08)}
.catband::before{content:"";position:absolute;inset:0;background:
  linear-gradient(90deg,rgba(8,17,38,.94) 0%,rgba(8,17,38,.72) 45%,rgba(8,17,38,.35) 100%);transition:.3s}
.catband:hover::before{background:linear-gradient(90deg,rgba(8,17,38,.9) 0%,rgba(20,55,140,.55) 50%,rgba(8,17,38,.3) 100%)}
.catband .inner{position:relative;z-index:1;display:flex;align-items:center;gap:32px;min-height:215px;padding:36px 24px}
.catband .num{font-size:46px;font-weight:900;color:#3f78ff;width:74px;flex:none;line-height:1}
.catband .body{flex:1}
.catband .tag{display:block;font-size:11.5px;font-weight:700;letter-spacing:1.5px;color:#9fc2ff;margin-bottom:6px}
.catband h3{font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.3px}
.catband p{opacity:.78;font-size:14.5px;margin-top:6px;max-width:560px}
.catband .go{width:48px;height:48px;border-radius:50%;border:1.6px solid rgba(255,255,255,.4);display:grid;place-items:center;font-size:22px;flex:none;transition:.2s}
.catband:hover .go{background:var(--blue);border-color:var(--blue);transform:translateX(4px)}
@media(max-width:600px){.catband .num{font-size:34px;width:50px}.catband .go{display:none}}

/* stats */
.stats{background:#fff;padding:54px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat .n{font-size:38px;font-weight:900;color:var(--navy);letter-spacing:-1px}
.stat .l{color:var(--muted);font-size:13.5px;margin-top:4px}
@media(max-width:760px){.stats-grid{grid-template-columns:repeat(2,1fr);gap:30px 16px}}

/* technology / R&D */
.tech-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.kicker{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;color:var(--blue);margin-bottom:12px}
.tech-text h2{font-size:30px;font-weight:800;color:var(--navy);letter-spacing:-.5px;margin-bottom:14px}
.tech-text>p{color:var(--muted);font-size:15px;max-width:540px}
.tech-list{list-style:none;margin:20px 0 14px;padding:0}
.tech-list li{position:relative;padding:10px 0 10px 26px;font-size:14.5px;border-top:1px solid var(--line)}
.tech-list li::before{content:"▹";position:absolute;left:0;color:var(--blue);font-weight:700}
.tech-list b{color:var(--ink)}
.tech-instr{font-size:13px;color:var(--muted);font-weight:600}
.tech-photo{height:340px;border-radius:var(--radius);background-size:cover;background-position:center;box-shadow:var(--shadow-lg)}
@media(max-width:820px){.tech-wrap{grid-template-columns:1fr}.tech-photo{height:220px}}

/* history timeline */
.history{background:var(--navy);color:#fff;padding:56px 0}
.hist-h{text-align:center;font-size:25px;font-weight:800;margin-bottom:32px;letter-spacing:-.3px}
.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.ms{position:relative;padding-top:22px;border-top:2px solid rgba(127,176,255,.35);font-size:13px;opacity:.88;line-height:1.4}
.ms span{display:block;font-size:22px;font-weight:800;color:#7fb0ff;margin-bottom:6px}
.ms::before{content:"";position:absolute;top:-7px;left:0;width:12px;height:12px;border-radius:50%;background:var(--blue)}
@media(max-width:760px){.timeline{grid-template-columns:1fr 1fr;gap:24px 18px}}

/* explore cards */
.section{padding:64px 0}.section-alt{background:var(--bg)}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:28px}
.section-head h2{font-size:28px;font-weight:800;color:var(--navy);letter-spacing:-.5px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.18s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card .ph{height:130px;width:100%;object-fit:cover}
.card .c{padding:15px}.card .tag{font-size:11px;font-weight:700;color:var(--blue);letter-spacing:.5px}
.card h4{font-size:15px;margin:5px 0;color:var(--ink);line-height:1.3}.card p{font-size:12.5px;color:var(--muted)}

/* product list/detail pages */
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;box-shadow:var(--shadow);transition:.15s}
.pcard:hover{border-color:var(--blue);transform:translateY(-2px)}
.pcard .code{font-size:11.5px;color:var(--blue);font-weight:700}
.pcard h3{font-size:15.5px;margin:4px 0 8px}.pcard .meta{font-size:12.5px;color:var(--muted)}
.pcard .meta b{color:var(--ink);font-weight:600}
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}
.chip{font-size:13px;padding:7px 14px;border:1px solid var(--line);border-radius:20px;background:#fff;cursor:pointer}
.chip.on,.chip:hover{background:var(--blue);color:#fff;border-color:var(--blue)}
.crumbs{font-size:13px;color:var(--muted);padding:18px 0}
.spec-table{width:100%;border-collapse:collapse;margin-top:8px}
.spec-table th,.spec-table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);font-size:14px}
.spec-table th{color:var(--muted);font-weight:600;width:180px}
.doc-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
/* inner pages get a solid header (no hero behind) */
.page .site-header{position:sticky;background:var(--navy)}
.page main{padding-top:14px}

/* footer */
.site-footer{background:var(--navy);color:#cdd7ee;padding:54px 0 28px;font-size:13.5px}
.foot-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:28px}
.foot-grid img{filter:none}
.foot-grid h5{color:#fff;font-size:12.5px;letter-spacing:.6px;margin-bottom:12px}
.foot-grid a{display:block;opacity:.72;padding:3px 0}.foot-grid a:hover{opacity:1}
.foot-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:18px;opacity:.6;font-size:12.5px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}

/* chat widget */
.chat-fab{position:fixed;right:22px;bottom:22px;z-index:60;width:56px;height:56px;border-radius:50%;background:var(--blue);color:#fff;border:none;cursor:pointer;font-size:24px;box-shadow:var(--shadow-lg)}
.chat-panel{position:fixed;right:22px;bottom:88px;z-index:60;width:360px;max-width:calc(100vw - 44px);height:480px;background:#fff;border-radius:16px;box-shadow:var(--shadow-lg);display:none;flex-direction:column;overflow:hidden}
.chat-panel.open{display:flex}
.chat-head{background:var(--navy);color:#fff;padding:14px 16px;font-weight:700}
.chat-body{flex:1;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:10px;background:var(--bg)}
.bubble{max-width:85%;padding:10px 13px;border-radius:12px;font-size:13.5px;white-space:pre-wrap}
.bubble.user{align-self:flex-end;background:var(--blue);color:#fff}
.bubble.ai{align-self:flex-start;background:#fff;border:1px solid var(--line)}
.bubble .src{display:block;margin-top:6px;font-size:11px;color:var(--muted)}
.chat-in{display:flex;border-top:1px solid var(--line)}
.chat-in input{flex:1;border:none;outline:none;padding:13px 14px;font:14px inherit}
.chat-in button{border:none;background:var(--blue);color:#fff;padding:0 18px;cursor:pointer;font-weight:600}