*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Segoe UI","Microsoft YaHei",Helvetica,Arial,sans-serif;color:#333;background:#f4f6f9;line-height:1.7}
a{text-decoration:none;color:#0d3b66}
img{max-width:100%;display:block}
.n7x-topbar{background:#0d3b66;color:#fff;padding:8px 0;font-size:13px}
.n7x-topbar .wrap{display:flex;justify-content:space-between;align-items:center}
.n7x-topbar a{color:#bcd}
.n7x-header{background:#fff;border-bottom:3px solid #0d3b66;position:sticky;top:0;z-index:100}
.n7x-header .wrap{display:flex;align-items:center;justify-content:space-between;padding:12px 20px}
.n7x-logo{display:flex;align-items:center;gap:10px}
.n7x-logo img{height:42px;width:auto}
.n7x-nav{display:flex;gap:4px;list-style:none}
.n7x-nav a{display:block;padding:10px 16px;color:#333;font-weight:600;border-radius:4px;font-size:15px}
.n7x-nav a:hover,.n7x-nav a.active{background:#0d3b66;color:#fff}
.n7x-burger{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:#0d3b66}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.n7x-hero{background:linear-gradient(135deg,#0d3b66 0%,#1a5276 60%,#2471a3 100%);color:#fff;padding:50px 0}
.n7x-hero .wrap{display:flex;align-items:center;gap:40px}
.n7x-hero-txt{flex:1}
.n7x-hero-txt h1{font-size:32px;margin-bottom:12px;line-height:1.3}
.n7x-hero-txt p{font-size:16px;opacity:.9;margin-bottom:20px}
.n7x-hero-img{flex:0 0 340px}
.n7x-hero-img img{border-radius:8px;box-shadow:0 8px 30px rgba(0,0,0,.3)}
.n7x-btn{display:inline-block;padding:10px 24px;background:#c8102e;color:#fff;border-radius:4px;font-weight:600;margin-right:10px}
.n7x-btn.alt{background:transparent;border:1px solid #fff}
.n7x-section{padding:40px 0}
.n7x-section h2{font-size:24px;color:#0d3b66;margin-bottom:20px;padding-left:12px;border-left:4px solid #c8102e}
.n7x-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.n7x-card{background:#fff;border-radius:6px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.06);transition:transform .2s}
.n7x-card:hover{transform:translateY(-3px)}
.n7x-card-img{height:160px;overflow:hidden;background:#eee}
.n7x-card-img img{width:100%;height:100%;object-fit:cover}
.n7x-card-body{padding:14px}
.n7x-card-body h3{font-size:15px;margin-bottom:6px;color:#222}
.n7x-card-body p{font-size:13px;color:#777}
.n7x-card-meta{font-size:12px;color:#999;margin-top:8px}
.n7x-list{background:#fff;border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.n7x-list-item{display:flex;gap:16px;padding:16px 20px;border-bottom:1px solid #eee}
.n7x-list-item:last-child{border-bottom:none}
.n7x-list-item img{width:120px;height:90px;object-fit:cover;border-radius:4px;flex-shrink:0}
.n7x-list-item h3{font-size:16px;margin-bottom:4px}
.n7x-list-item p{font-size:13px;color:#666}
.n7x-list-item .meta{font-size:12px;color:#999;margin-top:6px}
.n7x-article{background:#fff;padding:30px;border-radius:6px;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.n7x-article h1{font-size:26px;color:#0d3b66;margin-bottom:10px;line-height:1.4}
.n7x-article .art-meta{font-size:13px;color:#999;margin-bottom:20px;padding-bottom:14px;border-bottom:1px solid #eee}
.n7x-article .art-img{margin:20px 0;border-radius:6px;overflow:hidden}
.n7x-article .art-img img{width:100%}
.n7x-article p{margin-bottom:14px;font-size:15px}
.n7x-article ul,.n7x-article ol{margin:14px 0 14px 24px}
.n7x-article li{margin-bottom:6px}
.n7x-spec{width:100%;border-collapse:collapse;margin:16px 0}
.n7x-spec th,.n7x-spec td{border:1px solid #ddd;padding:10px 14px;text-align:left;font-size:14px}
.n7x-spec th{background:#eef2f7;width:160px;color:#0d3b66}
.n7x-sidebar{display:grid;grid-template-columns:1fr 300px;gap:24px}
.n7x-side-box{background:#fff;border-radius:6px;padding:18px;box-shadow:0 2px 8px rgba(0,0,0,.06);margin-bottom:20px}
.n7x-side-box h3{font-size:16px;color:#0d3b66;margin-bottom:12px;padding-bottom:8px;border-bottom:2px solid #eef2f7}
.n7x-side-box ul{list-style:none}
.n7x-side-box li{padding:6px 0;border-bottom:1px dashed #eee;font-size:14px}
.n7x-footer{background:#0d3b66;color:#bcd;margin-top:40px;padding:30px 0 16px}
.n7x-footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px}
.n7x-footer h4{color:#fff;margin-bottom:10px;font-size:15px}
.n7x-footer a{color:#bcd;font-size:13px;display:block;padding:3px 0}
.n7x-copy{text-align:center;padding-top:20px;margin-top:20px;border-top:1px solid #1a5276;font-size:12px}
.n7x-pager{display:flex;gap:8px;justify-content:center;margin-top:24px}
.n7x-pager a{padding:6px 14px;background:#fff;border:1px solid #ddd;border-radius:4px;font-size:14px}
.n7x-pager a.cur{background:#0d3b66;color:#fff}
.n7x-404{text-align:center;padding:80px 20px}
.n7x-404 h1{font-size:96px;color:#0d3b66;line-height:1}
.n7x-404 p{font-size:18px;margin:16px 0 24px;color:#666}
@media(max-width:900px){
.n7x-grid{grid-template-columns:repeat(2,1fr)}
.n7x-hero .wrap{flex-direction:column}
.n7x-hero-img{flex:none;width:100%;max-width:300px}
.n7x-sidebar{grid-template-columns:1fr}
.n7x-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:10px;box-shadow:0 6px 12px rgba(0,0,0,.1)}
.n7x-nav.open{display:flex}
.n7x-burger{display:block}
}
@media(max-width:600px){
.n7x-grid{grid-template-columns:1fr}
.n7x-list-item{flex-direction:column}
.n7x-list-item img{width:100%;height:160px}
.n7x-hero-txt h1{font-size:24px}
}