:root{--bg:#f4f7f8;--surface:#fff;--border:#dfe6e9;--text:#3d4145;--text-muted:#6b7378;--accent:#0e8ca5;--accent-hover:#0b7086;--cyan:#2bc4e8;--danger:#dc2626;--danger-bg:#fef2f2;--danger-border:#fecaca;--tag-bg:#e1f6fb;--tag-text:#0b7086;--logo-gray:#6a6d70;--focus-ring:rgba(14,140,165,.15);--overlay:rgba(20,35,40,.5);--radius:10px}:root[data-theme=dark]{--bg:#0d1417;--surface:#151f24;--border:#26343b;--text:#e6ebee;--text-muted:#8fa0a8;--accent:#14a3bf;--accent-hover:#2bc4e8;--cyan:#2bc4e8;--danger:#f87171;--danger-bg:hsla(0,91%,71%,.1);--danger-border:hsla(0,91%,71%,.35);--tag-bg:#123a46;--tag-text:#4ed4f2;--logo-gray:#b9bfc3;--focus-ring:rgba(43,196,232,.2);--overlay:rgba(0,8,12,.65)}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}.container{max-width:960px;margin:0 auto;padding:24px 20px 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