:root{
  --ink:#111418; --sub:#6b7280; --line:#e5e7eb;
  --accent:#0f4c81; --accent2:#2b7cb8; --dark:#0d1b2a; --bg:#f7f9fb;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Sukhumvit Set","Thonburi",sans-serif;
     color:var(--ink);background:#fff;line-height:1.6;font-size:15px}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
             backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.head-row{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-size:17px;letter-spacing:6px;font-weight:700}
.brand span{color:var(--accent)}
.nav{display:flex;gap:28px;align-items:center}
.nav a{font-size:13.5px;color:var(--sub);letter-spacing:.5px;transition:color .2s}
.nav a:hover{color:var(--accent)}
.nav-cta{color:#fff!important;background:var(--accent);padding:8px 18px;border-radius:3px}
.nav-cta:hover{background:var(--accent2)}
.lang{position:relative}
.lang-btn{border:1px solid var(--line);background:#fff;font-size:12.5px;padding:6px 10px;
          border-radius:3px;cursor:pointer;color:var(--ink);letter-spacing:1px}
.lang-menu{display:none;position:absolute;right:0;top:calc(100% + 6px);background:#fff;
           border:1px solid var(--line);border-radius:4px;min-width:120px;
           box-shadow:0 8px 24px rgba(13,27,42,.12);overflow:hidden}
.lang-menu.open{display:block}
.lang-menu button{display:block;width:100%;text-align:left;background:none;border:0;
                  padding:9px 14px;font-size:13px;cursor:pointer;color:var(--ink)}
.lang-menu button:hover{background:var(--bg)}
.lang-menu button.on{color:var(--accent);font-weight:700}

/* ---------- hero ---------- */
.hero{background:linear-gradient(160deg,#0d1b2a 0%,#0f4c81 62%,#2b7cb8 130%);color:#fff;
      padding:74px 0 66px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-140px;top:-140px;width:420px;height:420px;
             border-radius:50%;background:rgba(255,255,255,.05)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;position:relative;z-index:1}
.eyebrow{font-size:11.5px;letter-spacing:4px;opacity:.75;margin-bottom:18px}
.hero h1{font-size:40px;line-height:1.16;font-weight:700;letter-spacing:.3px}
.hero-sub{margin-top:20px;font-size:16px;line-height:1.75;opacity:.88;max-width:520px}
.hero-cta{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 28px;border-radius:3px;font-size:14px;letter-spacing:.5px;transition:all .2s}
.btn.primary{background:#fff;color:var(--accent);font-weight:700}
.btn.primary:hover{background:#e8f1f8}
.btn.ghost{border:1px solid rgba(255,255,255,.55);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.12)}
.hero-chips{margin-top:34px;display:flex;flex-wrap:wrap;gap:10px;list-style:none}
.hero-chips li{font-size:12px;letter-spacing:1px;border:1px solid rgba(255,255,255,.35);
               padding:6px 13px;border-radius:99px;opacity:.9}
.hero-fig{border-radius:8px;overflow:hidden;box-shadow:0 24px 60px rgba(0,0,0,.35)}
.hero-fig img{width:100%;height:100%;object-fit:cover}

/* ---------- trust bar ---------- */
.trustbar{background:var(--dark);color:#fff;padding:22px 0}
.trust-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;text-align:center}
.trust b{display:block;font-size:21px;letter-spacing:.5px;color:#9ec3dd}
.trust span{font-size:11.5px;opacity:.72;letter-spacing:.6px}

/* ---------- sections ---------- */
.section{padding:84px 0}
.section.alt{background:var(--bg)}
.sec-head{max-width:680px;margin-bottom:46px}
.sec-no{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:3px;margin-bottom:10px}
.sec-no.light{color:#9ec3dd}
.sec-head h2,.split-text h2,.contact h2{font-size:31px;line-height:1.25;letter-spacing:.3px}
.sec-head p{margin-top:14px;color:var(--sub);font-size:15px}

/* cards */
.card-grid{display:grid;gap:22px}
.card-grid.six{grid-template-columns:repeat(3,1fr)}
.card-grid.three{grid-template-columns:repeat(3,1fr)}
.card,.svc{background:#fff;border:1px solid var(--line);border-radius:6px;padding:26px;
           transition:box-shadow .25s,transform .25s}
.card:hover,.svc:hover{box-shadow:0 14px 34px rgba(13,27,42,.10);transform:translateY(-3px)}
.card img{width:100%;aspect-ratio:1.25;object-fit:contain;background:#fff;
          border:1px solid var(--line);border-radius:4px;margin-bottom:18px}
.card h3,.svc h3{font-size:16px;line-height:1.4;margin-bottom:8px}
.card p,.svc p{font-size:13.5px;color:var(--sub);line-height:1.65}
.svc .icon{width:54px;height:54px;object-fit:contain;margin-bottom:16px}

/* process */
.process{margin-top:52px;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.pstep{background:#fff;border:1px solid var(--line);border-radius:6px;padding:18px 14px;
       text-align:center;position:relative}
.pstep i{display:inline-flex;width:30px;height:30px;border-radius:50%;background:var(--accent);
         color:#fff;font-style:normal;font-size:13px;align-items:center;justify-content:center;margin-bottom:10px}
.pstep span{display:block;font-size:12.5px;color:var(--ink);line-height:1.4}

/* split sections */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-fig{border-radius:8px;overflow:hidden;box-shadow:0 18px 44px rgba(13,27,42,.14)}
.split-fig img{width:100%;object-fit:cover;aspect-ratio:4/3}
.split-text p{color:var(--sub);margin-top:14px;font-size:14.5px}
.checklist{list-style:none;margin-top:22px;display:grid;gap:12px}
.checklist.two{grid-template-columns:1fr 1fr;gap:12px 22px}
.checklist li{padding-left:28px;position:relative;font-size:14px}
.checklist li::before{content:"";position:absolute;left:0;top:4px;width:14px;height:8px;
  border-left:2.5px solid var(--accent);border-bottom:2.5px solid var(--accent);transform:rotate(-45deg)}

/* contact */
.contact{background:linear-gradient(150deg,#0d1b2a,#0f4c81 75%,#2b7cb8 140%);color:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.contact p{opacity:.85;margin-top:14px;max-width:440px}
.contact-line{margin-top:22px;font-size:14px;display:flex;gap:14px;align-items:baseline}
.contact-line span{opacity:.65;width:64px;letter-spacing:1px;font-size:12px;text-transform:uppercase}
.contact-line a{border-bottom:1px solid rgba(255,255,255,.4)}
.quote{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
       border-radius:8px;padding:28px;display:grid;gap:14px;backdrop-filter:blur(6px)}
.quote input,.quote textarea{background:rgba(255,255,255,.95);border:0;border-radius:3px;
  padding:13px 15px;font-size:14px;font-family:inherit;resize:vertical}
.quote .btn{border:0;cursor:pointer;text-align:center}

/* footer */
.footer{background:var(--dark);color:#fff;padding:26px 0}
.foot-row{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.foot-note{font-size:12px;opacity:.6;letter-spacing:.5px}

/* responsive */
@media (max-width:980px){
  .hero-grid,.split,.contact-grid{grid-template-columns:1fr;gap:36px}
  .card-grid.six,.card-grid.three{grid-template-columns:1fr 1fr}
  .trust-grid{grid-template-columns:repeat(3,1fr);gap:20px}
  .process{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:31px}
  .nav{display:none}
}
@media (max-width:620px){
  .card-grid.six,.card-grid.three{grid-template-columns:1fr}
  .checklist.two{grid-template-columns:1fr}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:60px 0}
}

/* CJK phrase-level wrapping */
:lang(zh) h1, :lang(zh) h2, :lang(zh) h3, :lang(zh) .pstep span { word-break: keep-all; }

/* ---------- hero case carousel ---------- */
.hero-carousel{position:relative;border-radius:8px;overflow:hidden;
               box-shadow:0 24px 60px rgba(0,0,0,.35)}
.car-track{display:flex;transition:transform .6s ease}
.car-slide{position:relative;flex:0 0 100%;border:0;padding:0;cursor:pointer;background:#0d1b2a;display:block;width:100%}
.car-slide img{width:100%;aspect-ratio:4/3;object-fit:cover;opacity:.94;display:block}
.car-slide:hover img{opacity:1}
.car-cap{position:absolute;left:0;right:0;bottom:0;text-align:left;padding:38px 22px 16px;
         background:linear-gradient(transparent,rgba(13,27,42,.88));color:#fff}
.car-cap b{display:block;font-size:15.5px;letter-spacing:.3px}
.car-cap i{display:block;font-style:normal;font-size:12.5px;opacity:.82;margin-top:3px}
.car-dots{position:absolute;right:14px;top:12px;display:flex;gap:6px}
.car-dots button{width:8px;height:8px;border-radius:50%;border:1px solid rgba(255,255,255,.85);
                 background:transparent;cursor:pointer;padding:0}
.car-dots button.on{background:#fff}

/* ---------- deployment scenarios ---------- */
.section.alt2{background:#eef3f8}
.cases-grid{display:grid;grid-template-columns:300px 1fr;gap:30px;align-items:start}
.case-menu{display:grid;gap:8px}
.case-menu button{display:flex;align-items:center;gap:14px;text-align:left;background:#fff;
                  border:1px solid var(--line);border-radius:5px;padding:15px 16px;cursor:pointer;
                  font-size:14px;color:var(--ink);font-family:inherit;transition:all .2s}
.case-menu button em{font-style:normal;font-size:11px;color:var(--sub);font-weight:700}
.case-menu button:hover{border-color:var(--accent)}
.case-menu button.on{background:linear-gradient(90deg,#0d1b2a,#0f4c81);color:#fff;border-color:transparent}
.case-menu button.on em{color:#9ec3dd}
.case-panel{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.case-panel figure{aspect-ratio:21/9;overflow:hidden}
.case-panel figure img{width:100%;height:100%;object-fit:cover}
.case-body{padding:28px 32px 32px}
.case-body h3{font-size:20px;margin-bottom:10px}
.case-body p{color:var(--sub);font-size:14px;margin-bottom:12px;line-height:1.7}
.case-link{display:inline-block;margin-top:4px;color:var(--accent);font-weight:600;font-size:13.5px}
@media (max-width:980px){
  .cases-grid{grid-template-columns:1fr}
  .case-panel figure{aspect-ratio:16/9}
}

/* form status note */
.form-note{font-size:13px;min-height:18px;text-align:center;opacity:.95}
.form-note.ok{color:#7dffb0}
.form-note.err{color:#ffb3b3}