:root{--brand:#3b82f6;--brand-strong:#2563eb;--brand-soft:#e8f0ff;--accent:#22d3ee;--violet:#7c3aed;--ink:#0b1220;--ink-soft:#46536b;--muted:#6b7893;--line:#dde5f4;--bg:#f4f7ff;--card:#fff;--night:#060d1f;--night-2:#0d1d3d;--radius:18px;--radius-sm:12px;--shadow:0 22px 48px -30px #0c204a80;--shadow-lift:0 30px 60px -34px #2563eb99;--page-max:1180px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;font-family:Inter,Helvetica Neue,PingFang SC,Microsoft YaHei,system-ui,sans-serif;line-height:1.65}a{color:var(--brand-strong);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;display:block}.site-shell{flex-direction:column;min-height:100vh;display:flex}.page-shell{width:100%;max-width:var(--page-max);margin:0 auto;padding:0 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