:root{--ink:#0B2341;--navy:#1C3B69;--paper:#F3F5F7;--white:#fff;--muted:#5F6E7F;--line:#D6DCE4;--accent:#F1AD00;--accent-dark:#8A5300;--accent-light:#FFD46A;--safe:max(22px,calc((100vw - 1160px)/2));--shadow:0 22px 55px rgba(15,32,42,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;line-height:1.75}img{display:block;max-width:100%}a{color:inherit;text-decoration:none}.top{height:76px;padding:0 var(--safe);display:flex;align-items:center;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:12px;margin-right:auto}.brand img{width:55px;height:55px;object-fit:contain}.brand strong{font-family:"Songti SC",serif;font-size:19px}.nav{display:flex;gap:26px;font-size:14px;font-weight:650}.nav 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