:root{--nav:#102438;--blue:#176da9;--green:#168064;--red:#d9494f;--orange:#e37e32;--gold:#d9ae45;--bg:#f2f5f6;--text:#26323a;--muted:#6e7a82;--line:#dce4e7;--white:#fff;--shadow:0 12px 32px rgba(16,36,56,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 system-ui,-apple-system,"Microsoft YaHei",sans-serif}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button{font:inherit}.container{width:min(1200px,calc(100% - 36px));margin:auto}.site-header{height:72px;background:rgba(16,36,56,.97);position:sticky;top:0;z-index:50;color:#fff}.navrow{height:72px;display:flex;align-items:center;gap:20px}.logo img{width:210px;height:49px}.nav{display:flex;align-items:center;gap:4px;flex:1}.nav a{padding:9px 10px;border-radius:8px;font-size:14px}.nav a:hover,.nav a.active{background:#fff;color:var(--nav)}.btn{display:inline-flex;justify-content:center;align-items:center;padding:12px 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