:root{--bg:#fff;--bg-soft:#f6f8fb;--bg-dark:#0b1220;--fg:#16202e;--fg-soft:#4a5567;--muted:#6b7686;--border:#e6eaf0;--brand:#1f6feb;--brand-dark:#1550b3;--brand-soft:#e9f1fe;--accent:#10b981;--radius:14px;--radius-sm:9px;--maxw:1140px;--shadow:0 1px 2px #1018280a, 0 8px 24px #1018280f;--font:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}body{background:var(--bg);color:var(--fg);font-family:var(--font);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-size:17px;line-height:1.7}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}h1,h2,h3,h4{color:var(--fg);letter-spacing:-.01em;font-weight:700;line-height:1.25}h1{margin:0 0 .5em;font-size:clamp(2rem,4vw,3rem)}h2{margin:1.8em 0 .6em;font-size:clamp(1.5rem,2.6vw,2rem)}h3{margin:1.5em 0 .5em;font-size:1.25rem}p{margin:0 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