:root{--brand:#1d5fbf;--brand-dark:#12447f;--ink:#1c2b3a;--muted:#5c6b7a;--bg:#f5f7fa;--line:#e3e8ee;--ok:#1a7f4e;--err:#b03434}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;line-height:1.7;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 20px}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .2s}
.site-header.scrolled{box-shadow:0 4px 16px rgba(16,42,74,.08)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--brand-dark)}
.logo small{display:block;font-size:10px;font-weight:400;letter-spacing:3px;color:var(--muted)}
.nav{display:flex;gap:6px}
.nav a{padding:8px 14px;border-radius:8px;font-size:15px;color:var(--ink)}
.nav a:hover{background:var(--bg);color:var(--brand)}
.nav a.active{color:var(--brand);font-weight:600;background:#eaf2fc}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:5px 0;border-radius:2px}
/* hero */
.hero{position:relative;color:#fff;display:flex;align-items:center;min-height:540px;background:#0a1e38 url(../assets/img/hero.jpg) center/cover no-repeat}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(6,22,44,.86) 0%,rgba(8,30,60,.62) 55%,rgba(10,36,70,.4) 100%)}
.hero .container{position:relative;padding:90px 20px}
.hero .eyebrow{display:inline-block;border:1px solid rgba(255,255,255,.4);padding:4px 14px;border-radius:20px;font-size:13px;letter-spacing:2px;margin-bottom:22px}
.hero h1{font-size:42px;line-height:1.3;font-weight:700;max-width:640px}
.hero p{margin-top:18px;font-size:18px;color:#d6e4f5;max-width:560px}
.hero .btns{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 28px;border-radius:8px;font-size:15px;transition:.2s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark)}
.btn-ghost{border:1px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
/* stats */
.stats{margin-top:-46px;position:relative;z-index:5}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px 10px;box-shadow:0 12px 32px rgba(16,42,74,.10)}
.stat{text-align:center}
.stat b{display:block;font-size:30px;color:var(--brand)}
.stat span{font-size:13px;color:var(--muted)}
/* sections */
.section{padding:72px 0}
.section.alt{background:var(--bg)}
.sec-head{text-align:center;max-width:680px;margin:0 auto 44px}
.sec-head .eyebrow{color:var(--brand);font-size:13px;letter-spacing:3px;font-weight:600}
.sec-head h2{font-size:30px;margin:8px 0 12px}
.sec-head p{color:var(--muted)}
/* cards */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px;transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(16,42,74,.10)}
.card .icon{width:52px;height:52px;border-radius:12px;background:#eaf2fc;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card h3{font-size:18px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--muted)}
.card .more{display:inline-block;margin-top:14px;color:var(--brand);font-size:14px;font-weight:600}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{background:var(--bg);border:1px solid var(--line);border-radius:20px;padding:3px 12px;font-size:12.5px;color:var(--muted)}
/* about split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.split img{border-radius:14px;width:100%;height:340px;object-fit:cover}
.check-list{list-style:none;margin-top:16px}
.check-list li{padding:7px 0 7px 30px;position:relative;color:var(--ink);font-size:15px}
.check-list li::before{content:"";position:absolute;left:0;top:12px;width:18px;height:18px;border-radius:50%;background:#e2f2ea}
.check-list li::after{content:"";position:absolute;left:5px;top:16px;width:8px;height:5px;border-left:2px solid var(--ok);border-bottom:2px solid var(--ok);transform:rotate(-45deg)}
/* news */
.news-card{overflow:hidden;padding:0;display:flex;flex-direction:column}
.news-card img{height:180px;width:100%;object-fit:cover}
.news-card .body{padding:20px 22px 24px}
.news-card .date{font-size:12.5px;color:var(--brand);font-weight:600}
.news-card h3{font-size:16.5px;margin:8px 0;line-height:1.5}
.news-card p{font-size:13.5px;color:var(--muted)}
/* cta band */
.cta-band{background:linear-gradient(100deg,var(--brand-dark),var(--brand));color:#fff;text-align:center;padding:64px 20px}
.cta-band h2{font-size:28px;margin-bottom:10px}
.cta-band p{color:#d6e4f5;margin-bottom:26px}
.cta-band .btn-primary{background:#fff;color:var(--brand-dark)}
/* contact */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px}
.info-card{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin-bottom:14px}
.info-card .icon{flex:0 0 44px;width:44px;height:44px;border-radius:10px;background:#eaf2fc;display:flex;align-items:center;justify-content:center}
.info-card b{display:block;font-size:15px}
.info-card span{font-size:14px;color:var(--muted);word-break:break-all}
.form{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:6px}
.field label i{color:var(--err);font-style:normal}
.field input,.field textarea{width:100%;padding:11px 13px;border:1px solid #cfd8e3;border-radius:8px;font-size:14.5px;font-family:inherit;outline:none;transition:border .2s}
.field input:focus,.field textarea:focus{border-color:var(--brand)}
.field textarea{min-height:120px;resize:vertical}
.hp{position:absolute;left:-9999px;opacity:0}
.form-status{display:none;margin-top:14px;padding:12px 14px;border-radius:8px;font-size:14px}
.form-status.ok{display:block;background:#e2f2ea;color:var(--ok);border:1px solid #bfe3d2}
.form-status.err{display:block;background:#fbeaea;color:var(--err);border:1px solid #f0c7c7}
/* article */
.prose{max-width:800px;margin:0 auto}
.prose .meta{color:var(--muted);font-size:13.5px;margin:10px 0 26px}
.prose .meta em{font-style:normal;color:var(--brand);font-weight:600}
.prose img{border-radius:14px;margin:10px 0 30px;width:100%;max-height:380px;object-fit:cover}
.prose h2{font-size:22px;margin:34px 0 14px;padding-left:12px;border-left:4px solid var(--brand)}
.prose p{color:#33475c;margin-bottom:14px;font-size:15.5px}
.crumb{font-size:13px;color:var(--muted);padding:22px 0 6px}
.crumb a{color:var(--brand)}
/* footer */
.site-footer{background:#12263a;color:#aebccd;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;padding:56px 0 40px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px}
.site-footer p,.site-footer a{font-size:13.5px;color:#aebccd;line-height:2}
.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:12.5px;color:#7e91a5;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.page-hero{background:linear-gradient(100deg,#0e2a4d,#1d5fbf);color:#fff;padding:70px 0 60px}
.page-hero h1{font-size:34px}
.page-hero p{margin-top:10px;color:#cfe0f2;max-width:620px}
/* 404 */
.nf{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.nf b{font-size:60px;color:var(--brand)}
/* responsive */
@media(max-width:900px){
 .hero h1{font-size:30px}.hero{min-height:460px}
 .grid-3,.grid-4,.grid-2,.stats .grid,.contact-grid,.split{grid-template-columns:1fr}
 .stats{margin-top:-30px}
 .footer-grid{grid-template-columns:1fr 1fr}
 .nav{position:fixed;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:12px 16px 18px;border-bottom:1px solid var(--line);display:none;box-shadow:0 12px 24px rgba(16,42,74,.12)}
 .nav.open{display:flex}
 .nav a{padding:12px}
 .nav-toggle{display:block}
}