:root{--bg:#F4F7FA;--white:#fff;--soft:#EAF1F6;--mint:#E9F8F8;--navy:#102E46;--deep:#163C57;--teal:#13B8C5;--blue:#237BD3;--heading:#18364B;--text:#344C60;--muted:#64798A;--line:#DCE6ED;--radius:14px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-wrap:break-word}body.drawer-open{overflow:hidden}a{color:#1266a9;text-underline-offset:3px}a:hover{color:#087e8a}button,a{ -webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #2b92cf;outline-offset:3px}img{max-width:100%;height:auto}.container{width:min(100% - 56px,1200px);margin-inline:auto}.site-header{background:#fff}.brand-row{height:72px;display:flex;align-items:center;gap:20px;min-width:0}.brand{display:flex;align-items:center;flex-shrink:0;text-decoration:none;color:var(--navy)}.brand 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