:root{--blue:#0033A0;--bright:#0052CC;--deep:#002066;--ink:#0A1628;--text:#1E2A3A;--muted:#4A5568;--soft:#718096;--line:rgba(0,51,160,.14);--bg:#fff;--deepbg:#F5F7FA;--sub:#EEF1F6;--shadow:0 12px 36px rgba(0,33,102,.08);--header-h:134px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}body.panel-open{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.skip-link{position:fixed;left:12px;top:-70px;background:#fff;color:var(--deep);padding:10px 14px;z-index:1000;border:1px solid var(--line)}.skip-link:focus{top:10px}.site-header{position:fixed;inset:0 0 auto 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