:root{--ink:#17243b;--muted:#667085;--line:#dfe5ec;--paper:#fff;--soft:#f4f7fa;--navy:#163b64;--navy2:#0d2948;--accent:#d3a54c;--radius:16px;--shadow:0 12px 30px rgba(17,36,60,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65;background:#fff}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.container{width:min(1160px,calc(100% - 36px));margin:auto}.narrow{width:min(920px,calc(100% - 36px))}.site-header{height:72px;background:#fff;border-bottom:1px solid 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