:root{
  --blue-900:#0C447C; --blue-700:#12497f; --blue-600:#185FA5; --blue-500:#2f74b8;
  --blue-100:#E6F1FB; --blue-50:#F4F8FC;
  --gold:#C9A25E; --gold-dark:#A87F35;
  --ink:#1F2937; --muted:#64707d; --line:#E5E8EC; --bg:#FFFFFF; --bg-soft:#F7F9FB;
  --radius:12px; --shadow:0 6px 24px rgba(12,68,124,.08);
  --font:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;-webkit-text-size-adjust:100%}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
.topbar{background:var(--blue-900);color:#cfe0f2;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:36px;gap:12px}
.topbar a{color:#fff}
.topbar .tb-r{display:flex;gap:16px;white-space:nowrap}
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand img{height:44px;width:auto}
.nav{display:flex;align-items:center;gap:4px}
.nav>li{position:relative}
.nav>li>a{display:block;padding:10px 16px;font-size:16px;font-weight:500;border-radius:8px;transition:.2s}
.nav>li>a:hover,.nav>li>a.active{color:var(--blue-600);background:var(--blue-50)}
.nav .sub{position:absolute;top:100%;left:8px;min-width:176px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:6px;opacity:0;visibility:hidden;transform:translateY(6px);transition:.18s}
.nav>li:hover .sub,.nav>li:focus-within .sub{opacity:1;visibility:visible;transform:none}
.nav .sub a{display:block;padding:9px 12px;font-size:15px;border-radius:8px;color:var(--ink)}
.nav .sub a:hover{background:var(--blue-50);color:var(--blue-600)}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:8px;width:42px;height:42px;cursor:pointer;position:relative}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{position:absolute;left:10px;width:20px;height:2px;background:var(--blue-900);content:""}
.nav-toggle span{top:20px}
.nav-toggle span::before{top:-6px;left:0}
.nav-toggle span::after{top:6px;left:0}

/* ---------- hero / banner ---------- */
.hero{position:relative;overflow:hidden;background:var(--blue-900)}
.slides{position:relative}
.slide{display:none;position:relative}
.slide.active{display:block}
.slide img{width:100%;height:520px;object-fit:cover}
.slide .cap{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:14px;color:#fff;text-align:center;padding:0 20px;background:rgba(8,30,56,.28)}
.slide .cap h1,.slide .cap .h1{font-size:42px;font-weight:500;letter-spacing:.06em;text-shadow:0 2px 12px rgba(0,0,0,.4)}
.slide .cap p{font-size:18px;opacity:.92;letter-spacing:.04em}
.dots{position:absolute;bottom:18px;left:0;right:0;display:flex;justify-content:center;gap:10px;z-index:5}
.dots button{width:34px;height:5px;border:0;border-radius:3px;background:rgba(255,255,255,.45);cursor:pointer;transition:.2s}
.dots button.active{background:#fff}
.page-head{background:linear-gradient(120deg,var(--blue-900),var(--blue-600));color:#fff;padding:54px 0}
.page-head h1{font-size:30px;font-weight:500;letter-spacing:.04em}
.page-head .crumb{font-size:14px;opacity:.85;margin-top:6px}
.page-head .crumb a{color:#fff}

/* ---------- sections ---------- */
.section{padding:64px 0}
.section.soft{background:var(--bg-soft)}
.sec-head{text-align:center;margin-bottom:40px}
.sec-head .kicker{display:inline-block;font-size:13px;letter-spacing:.18em;color:var(--gold-dark);margin-bottom:8px}
.sec-head h2{font-size:30px;font-weight:500;color:var(--blue-900)}
.sec-head p{color:var(--muted);margin-top:8px}
.sec-head::after{content:"";display:block;width:44px;height:3px;background:var(--gold);margin:16px auto 0;border-radius:2px}

.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfe0f2}
.card .thumb{aspect-ratio:4/3;overflow:hidden;background:#fff;display:flex;align-items:center;justify-content:center;padding:14px}
.card .thumb img{max-height:100%;object-fit:contain;transition:.3s}
.card:hover .thumb img{transform:scale(1.04)}
.card .body{padding:18px 20px 20px;flex:1}
.card h3{font-size:17px;font-weight:500;color:var(--blue-900);line-height:1.45}
.card p{font-size:14px;color:var(--muted);margin-top:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .more{margin-top:14px;font-size:14px;color:var(--blue-600);font-weight:500}
.card .more::after{content:" →"}

.btn{display:inline-block;padding:11px 26px;border-radius:8px;font-size:15px;font-weight:500;transition:.2s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--blue-600);color:#fff}
.btn-primary:hover{background:var(--blue-900)}
.btn-ghost{border-color:rgba(255,255,255,.7);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

/* about strip */
.about-strip{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.about-strip h2{font-size:28px;font-weight:500;color:var(--blue-900);margin-bottom:14px}
.about-strip p{color:#3d4854;margin-bottom:12px}
.pts{margin-top:18px;display:grid;gap:10px}
.pts li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:#3d4854}
.pts li::before{content:"";flex:none;width:8px;height:8px;border-radius:50%;background:var(--gold);margin-top:9px}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:6px}
.stats .s{background:var(--blue-50);border-radius:10px;padding:16px;text-align:center}
.stats b{display:block;font-size:26px;font-weight:500;color:var(--blue-600)}
.stats span{font-size:13px;color:var(--muted)}

/* category chip */
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:32px}
.chip{padding:8px 20px;border:1px solid var(--line);border-radius:999px;font-size:15px;color:var(--muted);background:#fff;cursor:pointer;transition:.2s}
.chip:hover{border-color:var(--blue-600);color:var(--blue-600)}
.chip.active{background:var(--blue-600);border-color:var(--blue-600);color:#fff}
.cat-block{margin-bottom:40px}
.cat-block h2{font-size:20px;color:var(--blue-900);font-weight:500;padding-left:12px;border-left:4px solid var(--gold);margin-bottom:20px}

/* article / product detail */
.detail{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:start}
.article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 38px}
.article h1{font-size:26px;font-weight:500;color:var(--blue-900);line-height:1.4}
.article .meta{font-size:13px;color:var(--muted);margin:10px 0 22px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.article h2{font-size:19px;font-weight:500;color:var(--blue-900);margin:26px 0 10px;padding-left:10px;border-left:4px solid var(--gold)}
.article h3{font-size:16px;font-weight:500;margin:18px 0 8px;color:var(--ink)}
.article p{margin:10px 0;color:#333c46}
.article ul{margin:10px 0;padding-left:2px}
.article ul li{padding:5px 0 5px 18px;position:relative;color:#333c46}
.article ul li::before{content:"";position:absolute;left:2px;top:14px;width:6px;height:6px;border-radius:50%;background:var(--gold)}
.article figure{margin:20px 0;text-align:center}
.article figure img{border-radius:10px;margin:0 auto}
.article figcaption{font-size:13px;color:var(--muted);margin-top:8px}
.article table{width:100%;border-collapse:collapse;margin:14px 0;font-size:14.5px}
.article th,.article td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
.article th{background:var(--blue-50);color:var(--blue-900);font-weight:500;white-space:nowrap}
.hero-figure{margin:0 0 22px}
.side{position:sticky;top:88px;display:grid;gap:20px}
.side .box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.side .box h4{font-size:16px;font-weight:500;color:var(--blue-900);margin-bottom:12px}
.side .box ul li{padding:7px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.side .box ul li:last-child{border:0}
.side .box ul li a:hover{color:var(--blue-600)}
.side .contact-mini{background:var(--blue-900);color:#dbe7f4;border:0}
.side .contact-mini h4{color:#fff}
.side .contact-mini li{border-color:rgba(255,255,255,.14);color:#dbe7f4}
.side .qr{text-align:center}
.side .qr img{width:130px;margin:6px auto}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:36px;align-items:start}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.info-card h3{font-size:18px;font-weight:500;color:var(--blue-900);margin-bottom:14px}
.info-card .row{display:flex;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:15px}
.info-card .row:last-child{border:0}
.info-card .row b{flex:none;width:64px;color:var(--muted);font-weight:400}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.form-card h3{font-size:20px;font-weight:500;color:var(--blue-900);margin-bottom:4px}
.form-card .hint{font-size:13px;color:var(--muted);margin-bottom:18px}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{margin-bottom:14px}
.field label{display:block;font-size:14px;color:#3d4854;margin-bottom:6px}
.field label em{color:#d64545;font-style:normal}
.field input,.field textarea,.field select{width:100%;padding:11px 13px;border:1px solid #d4dae1;border-radius:8px;font-size:15px;font-family:inherit;background:#fbfcfd;transition:.2s}
.field input:focus,.field textarea:focus,.field select:focus{outline:0;border-color:var(--blue-600);background:#fff}
.field textarea{min-height:120px;resize:vertical}
.hp{position:absolute;left:-9999px;opacity:0;height:0;overflow:hidden}
.form-note{font-size:13px;color:var(--muted);margin-top:12px}
.form-ok{display:none;background:#eef7ee;border:1px solid #bfe3bf;color:#2c6e2c;padding:14px 16px;border-radius:8px;margin-bottom:16px;font-size:14.5px}
.form-err{display:none;background:#fdeeee;border:1px solid #f0c2c2;color:#a33;padding:14px 16px;border-radius:8px;margin-bottom:16px;font-size:14.5px}

/* news list */
.news-item{display:flex;gap:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:.2s}
.news-item:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.news-item .date{flex:none;width:86px;height:86px;border-radius:10px;background:var(--blue-50);display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--blue-600)}
.news-item .date b{font-size:26px;font-weight:500;line-height:1.1}
.news-item .date span{font-size:12.5px;color:var(--muted)}
.news-item h3{font-size:17px;font-weight:500;color:var(--blue-900)}
.news-item p{font-size:14px;color:var(--muted);margin-top:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item .tag{display:inline-block;font-size:12px;color:var(--blue-600);background:var(--blue-50);border-radius:4px;padding:1px 8px;margin-bottom:6px}
.news-list{display:grid;gap:16px}
.empty-note{background:#fff;border:1px dashed #ccd4dc;border-radius:var(--radius);padding:44px 20px;text-align:center;color:var(--muted)}

/* footer */
.site-footer{background:#0a2a4d;color:#b9c9da;margin-top:0}
.footer-main{display:grid;grid-template-columns:1.3fr 1fr 1fr .8fr;gap:32px;padding:52px 0 40px}
.site-footer h4{color:#fff;font-size:16px;font-weight:500;margin-bottom:14px}
.site-footer .flogo{height:34px;margin-bottom:14px}
.site-footer p,.site-footer li{font-size:14px;line-height:1.9}
.site-footer a:hover{color:#fff}
.site-footer .qr{width:110px;margin-top:8px;border-radius:6px;background:#fff;padding:5px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:13px;color:#8fa5ba;display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between}
.footer-bottom a{color:#8fa5ba}
.gotop{position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);color:var(--blue-600);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;pointer-events:none;transition:.25s;z-index:90}
.gotop.show{opacity:1;pointer-events:auto}

/* CTA band */
.cta-band{background:linear-gradient(120deg,var(--blue-900),var(--blue-600));color:#fff;padding:52px 0}
.cta-band .wrap{display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.cta-band h2{font-size:24px;font-weight:500}
.cta-band p{opacity:.85;font-size:15px;margin-top:4px}
.cta-band .acts{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- responsive ---------- */
@media (max-width:1000px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:repeat(2,1fr)}
  .detail{grid-template-columns:1fr}
  .side{position:static;grid-template-columns:1fr 1fr}
  .footer-main{grid-template-columns:1fr 1fr}
  .about-strip{grid-template-columns:1fr;gap:26px}
  .slide img{height:400px}
  .slide .cap h1,.slide .cap .h1{font-size:32px}
}
@media (max-width:760px){
  .topbar .tb-r span.addr{display:none}
  .nav{position:fixed;top:0;right:-300px;width:280px;height:100vh;background:#fff;flex-direction:column;align-items:stretch;padding:76px 18px 24px;gap:2px;box-shadow:-8px 0 30px rgba(0,0,0,.12);transition:right .25s;overflow-y:auto;z-index:200}
  .nav.open{right:0}
  .nav>li>a{font-size:16.5px;padding:12px 10px;border-bottom:1px solid var(--line);border-radius:0}
  .nav .sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 6px 10px;display:none}
  .nav>li.open .sub{display:block}
  .nav>li.has-sub>a::after{content:"▾";float:right;color:var(--muted)}
  .nav>li.open.has-sub>a::after{content:"▴"}
  .nav-toggle{display:block;z-index:210}
  .nav-mask{position:fixed;inset:0;background:rgba(0,0,0,.4);opacity:0;pointer-events:none;transition:.25s;z-index:150}
  .nav-mask.show{opacity:1;pointer-events:auto}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .frow{grid-template-columns:1fr}
  .section{padding:44px 0}
  .sec-head h2{font-size:24px}
  .slide img{height:300px}
  .slide .cap h1,.slide .cap .h1{font-size:24px}
  .slide .cap p{font-size:15px}
  .footer-main{grid-template-columns:1fr;gap:24px;padding:36px 0 26px}
  .news-item{flex-direction:row}
  .news-item .date{width:70px;height:70px}
  .news-item .date b{font-size:20px}
  .article{padding:22px 18px}
  .side{grid-template-columns:1fr}
  .page-head{padding:38px 0}
  .page-head h1{font-size:24px}
  .cta-band .wrap{flex-direction:column;align-items:flex-start}
}