:root{--ink:#071120;--paper:#fff;--surface:#f6f8fc;--line:#dbe4f0;--text:#101828;--muted:#667085;--blue:#2f6fed;--blue2:#1f56cf;--shadow:0 30px 80px rgba(7,17,32,.11);--radius:24px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.65}a{text-decoration:none;color:inherit}.container{width:min(1180px,calc(100% - 32px));margin:auto}.announcement{background:var(--ink);color:#dce7f7;font-size:13px;padding:9px 0}.announcement .container{display:flex;justify-content:space-between;gap:16px}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:40;background:hsla(0,0%,100%,.9);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid rgba(219,228,240,.85)}.nav{min-height:78px;justify-content:space-between;gap:28px}.brand,.nav{display:flex;align-items:center}.brand{gap:12px;font-weight:850}.brand 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