:root{--navy:#0b1d3a;--blue:#1f5eff;--gold:#b99155;--ink:#1d2433;--muted:#657083;--bg:#f7f9fc;--white:#fff;--line:#e6ebf2;--shadow:0 20px 60px rgba(11,29,58,.12);--radius:24px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(1180px,92vw);margin:0 auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(18px);border-bottom:1px solid 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