:root{--bg:#f6f8fc;--panel:#fff;--ink:#101828;--muted:#667085;--line:#d9e2f2;--brand:#245bff;--brand2:#153ec9;--soft:#eef4ff;--good:#067647;--warn:#b54708;--bad:#b42318;--shadow:0 18px 50px rgba(16,24,40,.08);--radius:22px;--max:1180px}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at top left,#e9f1ff 0,#f6f8fc 36%,#f7f7fb 100%);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;line-height:1.55}a{color:inherit;text-decoration:none}p{margin:0 0 12px}.site-header{position:sticky;top:0;z-index:30;backdrop-filter:blur(14px);background:rgba(255,255,255,.84);border-bottom:1px solid var(--line)}.nav{max-width:var(--max);margin:auto;display:flex;align-items:center;justify-content:space-between;padding:14px 20px}.brand{display:flex;align-items:center;gap:10px;font-weight:800}.brand-mark{width:36px;height:36px;border-radius:13px;background:linear-gradient(135deg,var(--brand),#82a6ff);box-shadow:0 12px 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