:root{
  --navy:#1b2a4a; --gold:#b08d57; --ink:#22293a; --mut:#5b6478;
  --bg:#f6f7f9; --line:#e6e8ee; --white:#fff;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);line-height:1.65;background:var(--bg);font-size:16px}
a{color:var(--navy);text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1100px;margin:0 auto;padding:0 20px}
/* header */
header.site{background:var(--navy);color:#fff;position:sticky;top:0;z-index:50;box-shadow:0 2px 12px rgba(0,0,0,.15)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;flex-wrap:wrap}
.brand{font-size:20px;font-weight:700;letter-spacing:.5px;color:#fff}
.brand small{display:block;font-size:11px;font-weight:400;color:#c7d0e2;letter-spacing:1px}
.nav ul{list-style:none;display:flex;gap:22px;flex-wrap:wrap}
.nav ul a{color:#e7ebf3;font-size:15px}
.nav ul a:hover{color:var(--gold)}
.cta{background:var(--gold);color:#fff!important;padding:8px 18px;border-radius:4px;font-weight:600}
/* hero */
.hero{background:linear-gradient(135deg,#16233f 0%,#27406e 100%);color:#fff;padding:72px 0}
.hero h1{font-size:38px;line-height:1.25;margin-bottom:16px;font-weight:700}
.hero p{font-size:18px;color:#d5dcea;max-width:720px;margin-bottom:26px}
.hero .btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 28px;border-radius:5px;font-weight:600;font-size:16px}
.btn-gold{background:var(--gold);color:#fff}
.btn-outline{border:1.5px solid #fff;color:#fff}
/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:44px}
.stat{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:8px;padding:20px;text-align:center}
.stat b{display:block;font-size:30px;color:var(--gold)}
.stat span{font-size:13px;color:#c7d0e2}
/* sections */
section{padding:60px 0}
.sec-head{text-align:center;margin-bottom:40px}
.sec-head h2{font-size:30px;color:var(--navy);margin-bottom:10px}
.sec-head p{color:var(--mut);max-width:680px;margin:0 auto}
.alt{background:var(--white)}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.card{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:28px;box-shadow:0 2px 10px rgba(20,30,60,.04)}
.alt .card{background:var(--bg)}
.card h3{color:var(--navy);font-size:19px;margin-bottom:10px}
.card p{color:var(--mut);font-size:15px}
.card .ic{font-size:30px;margin-bottom:12px}
/* product/case cards with image */
.pcard{background:var(--white);border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:0 2px 10px rgba(20,30,60,.05)}
.pcard img{width:100%;height:210px;object-fit:cover;background:#e9ecf2}
.pcard .bd{padding:20px}
.pcard h3{font-size:17px;color:var(--navy);margin-bottom:6px}
.pcard p{font-size:14px;color:var(--mut)}
/* process */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:s}
.step{text-align:center;padding:18px 10px}
.step .n{width:44px;height:44px;line-height:44px;margin:0 auto 12px;border-radius:50%;background:var(--navy);color:#fff;font-weight:700}
.step h4{font-size:15px;color:var(--navy);margin-bottom:4px}
.step p{font-size:13px;color:var(--mut)}
/* table */
table{width:100%;border-collapse:collapse;background:var(--white);border-radius:10px;overflow:hidden}
th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:15px}
th{background:var(--navy);color:#fff;font-weight:600}
td:first-child{font-weight:600;color:var(--navy)}
/* faq */
.faq details{background:var(--white);border:1px solid var(--line);border-radius:8px;padding:16px 20px;margin-bottom:12px}
.faq summary{font-weight:600;color:var(--navy);cursor:pointer;font-size:16px}
.faq details p{margin-top:10px;color:var(--mut);font-size:15px}
/* contact */
.contact-box{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:start}
.cinfo li{list-style:none;padding:10px 0;border-bottom:1px dashed var(--line);color:var(--ink)}
.cinfo li b{color:var(--navy);display:inline-block;min-width:130px}
/* footer */
footer.site{background:var(--navy);color:#c7d0e2;padding:40px 0 24px;font-size:14px}
footer .fgrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;margin-bottom:24px}
footer h4{color:#fff;margin-bottom:12px;font-size:15px}
footer a{color:#c7d0e2}
footer .copy{border-top:1px solid rgba(255,255,255,.12);padding-top:18px;text-align:center;font-size:13px;color:#93a0ba}
.lead{font-size:17px;color:var(--mut);max-width:800px;margin:0 auto 10px;text-align:center}
@media(max-width:860px){
  .hero h1{font-size:28px}
  .stats,.grid3,.grid2,.steps,.contact-box,footer .fgrid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr 1fr}
  .nav ul{gap:14px}
}