/* Sitongsi EN — shared styles. Blue/white business, consistent with the Chinese site. */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

:root{
  --navy:#0B2545;
  --navy2:#143a6b;
  --blue:#1F6FEB;
  --blue-light:#6FB1FF;
  --soft:#E8F1FD;
  --ink:#1A2433;
  --gray:#5C6B7E;
  --line:#D8E2EE;
  --bg:#FFFFFF;
  --bg-alt:#F5F9FF;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:'Inter',system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}

.wrap{max-width:1100px;margin:0 auto;padding:0 24px;}

/* ---- top bar ---- */
.nav{position:sticky;top:0;z-index:50;background:rgba(11,37,69,.95);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.08);}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;}
.nav .brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:18px;}
.nav .brand .mark{width:34px;height:34px;border:2px solid var(--blue);border-radius:8px;display:flex;align-items:center;justify-content:center;background:rgba(31,111,235,.08);font-weight:900;}
.nav-links{display:flex;align-items:center;gap:26px;}
.nav-links a{font-size:14px;font-weight:500;color:var(--soft);}
.nav-links a:hover{color:var(--blue-light);}
.nav-links .lang{border:1px solid rgba(255,255,255,.25);border-radius:6px;padding:5px 11px;font-weight:600;font-size:13px;color:var(--soft);}
.nav-links .lang:hover{border-color:var(--blue-light);color:var(--blue-light);}
.nav-cta{background:var(--blue);color:#fff;padding:9px 16px;border-radius:8px;font-weight:600;font-size:14px;}
.nav-cta:hover{background:#1a5fd0;color:#fff;}

/* ---- hero ---- */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 60%,var(--blue) 135%);color:#fff;position:relative;overflow:hidden;}
.hero::after{content:"";position:absolute;right:-12%;top:-30%;width:60%;height:160%;background:radial-gradient(circle,rgba(31,111,235,.4),transparent 62%);}
.hero .wrap{position:relative;z-index:2;padding:90px 24px 80px;}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;text-transform:uppercase;color:var(--blue-light);font-weight:600;margin-bottom:18px;}
.hero h1{font-size:46px;line-height:1.12;font-weight:900;letter-spacing:-1px;max-width:18ch;margin-bottom:18px;}
.hero h1 .hl{color:var(--blue-light);}
.hero .lead{font-size:18px;color:#C9DDF6;max-width:54ch;margin-bottom:30px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 24px;border-radius:10px;font-weight:600;font-size:15px;}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:#3a82ff;}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.25);}
.btn-ghost:hover{background:rgba(255,255,255,.16);}

/* ---- stat strip ---- */
.stats{background:var(--navy);border-top:1px solid rgba(255,255,255,.08);}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:26px 24px;}
.stat{color:#fff;}
.stat .n{font-size:26px;font-weight:800;color:var(--blue-light);}
.stat .l{font-size:13px;color:#9DC2F5;margin-top:2px;}

/* ---- sections ---- */
section{padding:74px 0;}
.section-alt{background:var(--bg-alt);}
.label{font-size:13px;letter-spacing:2px;text-transform:uppercase;color:var(--blue);font-weight:700;margin-bottom:12px;}
h2.title{font-size:32px;font-weight:800;color:var(--navy);letter-spacing:-.5px;max-width:24ch;margin-bottom:14px;}
.section-intro{color:var(--gray);font-size:17px;max-width:60ch;margin-bottom:40px;}

/* cards */
.grid{display:grid;gap:20px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.card{border:1px solid var(--line);border-radius:14px;padding:26px;background:#fff;transition:transform .15s,box-shadow .15s;}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(11,37,69,.08);}
.card .ic{width:46px;height:46px;border-radius:11px;background:var(--soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px;}
.card .ic svg{width:24px;height:24px;stroke:var(--blue);fill:none;stroke-width:1.8;}
.card h3{font-size:18px;font-weight:700;color:var(--navy);margin-bottom:8px;}
.card p{color:var(--gray);font-size:15px;}

/* why list */
.why{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.why-item{display:flex;gap:14px;align-items:flex-start;}
.why-item .chk{flex-shrink:0;width:30px;height:30px;border-radius:50%;background:var(--blue);display:flex;align-items:center;justify-content:center;margin-top:2px;}
.why-item .chk svg{width:15px;height:15px;stroke:#fff;fill:none;stroke-width:3;}
.why-item h3{font-size:17px;font-weight:700;color:var(--navy);margin-bottom:4px;}
.why-item p{color:var(--gray);font-size:15px;}

/* CTA band */
.cta-band{background:linear-gradient(135deg,var(--navy),var(--blue) 160%);color:#fff;border-radius:18px;padding:48px;text-align:center;}
.cta-band h2{font-size:30px;font-weight:800;margin-bottom:10px;}
.cta-band p{color:#C9DDF6;font-size:17px;margin-bottom:26px;}

/* footer */
footer{background:var(--navy);color:#9DC2F5;padding:50px 0 30px;font-size:14px;}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px;margin-bottom:30px;}
footer h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:14px;letter-spacing:.5px;}
footer .co{color:#fff;font-weight:800;font-size:17px;margin-bottom:10px;}
footer a:hover{color:#fff;}
footer ul{list-style:none;display:flex;flex-direction:column;gap:9px;}
footer .bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#7FA6D6;}

/* contact specifics */
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:36px;align-items:start;}
.contact-row{display:flex;gap:14px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--line);}
.contact-row .ic{flex-shrink:0;width:40px;height:40px;border-radius:10px;background:var(--soft);display:flex;align-items:center;justify-content:center;}
.contact-row .ic svg{width:20px;height:20px;stroke:var(--blue);fill:none;stroke-width:1.8;}
.contact-row .k{font-size:13px;color:var(--gray);text-transform:uppercase;letter-spacing:1px;}
.contact-row .v{font-size:18px;font-weight:600;color:var(--navy);}
.qr-card{border:1px solid var(--line);border-radius:14px;padding:26px;text-align:center;background:#fff;}
.qr-box{width:160px;height:160px;margin:0 auto 14px;border:1px dashed var(--line);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--gray);font-size:13px;text-align:center;padding:10px;}

/* page hero (subpages) */
.page-hero{background:linear-gradient(135deg,var(--navy),var(--navy2) 90%);color:#fff;padding:70px 0 56px;}
.page-hero h1{font-size:38px;font-weight:900;letter-spacing:-.5px;margin-bottom:12px;}
.page-hero p{color:#C9DDF6;font-size:18px;max-width:56ch;}

/* responsive */
@media (max-width:860px){
  .nav-links{gap:14px;}
  .nav-links a:not(.lang):not(.nav-cta){display:none;}
  .hero h1{font-size:34px;}
  .stats .wrap{grid-template-columns:repeat(2,1fr);}
  .grid-2,.grid-3,.why,.contact-grid{grid-template-columns:1fr;}
  footer .cols{grid-template-columns:1fr;}
  .cta-band{padding:34px 22px;}
}