:root{--frost:#FAF8FF;--deep:#E8F2FA;--surface:#FFFFFF;--lavender:#EDE7F8;--ink:#3D2F66;--text:#4A4560;--muted:#6B6580;--aux:#8A84A0;--purple:#C9B8F0;--purple-dark:#6B5B95;--blue:#B7D6F0;--blue-dark:#3D6B8A;--border:rgba(107,91,149,.20);--shadow:0 14px 36px rgba(61,47,102,.10);--max:1180px;--header-h:107px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--frost);color:var(--text);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:16px;line-height:1.78;overflow-x:hidden}body.panel-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.shell{width:min(var(--max),calc(100% - 32px));margin:0 auto}.skip-link{position:fixed;left:16px;top:-60px;z-index:9999;background:#fff;color:var(--ink);padding:10px 14px}.skip-link:focus{top:10px}.site-header{position:fixed;z-index:1000;inset:0 0 auto 0;box-shadow:0 5px 24px 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