:root{--ink:#101828;--muted:#667085;--line:#e4e7ec;--paper:#fff;--soft:#f8fafc;--accent:#175cd3;--accent2:#0b4fb8;--success:#067647;--danger:#b42318;--warn:#b54708;--radius:20px;--shadow:0 14px 40px rgba(16,24,40,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink);background:#fff}button,input,select{font:inherit}button{cursor:pointer}.shell{width:min(1180px,calc(100% - 36px));margin:auto}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.9);backdrop-filter:blur(14px);border-bottom:1px solid 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