:root{--blue:#2563eb;--blue2:#138cff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--bg:#f8fafc;--surface:#fff;--dark:#07111f;--radius:24px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;line-height:1.6}html[dir=rtl] body{font-family:IRANYekan,"Noto Sans Arabic",Tahoma,Arial,sans-serif}.container{width:min(1160px,calc(100% - 40px));margin:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(18px);border-bottom:1px solid 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