:root{--navy:#0b2240;--navy2:#102d52;--gold:#caa35a;--light:#f5f7fb;--line:#dfe6f1;--text:#223047;--muted:#66758c;--white:#fff}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:var(--white);line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.container{width:min(1180px,92%);margin:auto}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.nav-wrap{display:flex;align-items:center;justify-content:space-between;min-height:74px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:22px}.site-nav{display:flex;align-items:center;gap:8px}.site-nav a{padding:10px 12px;border-radius:999px;color:#35445c;font-size:15px}.site-nav a.active,.site-nav 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.mt-24{margin-top:24px}.mt-26{margin-top:26px}