:root{--bg: #fafbff;--surface: #ffffff;--surface-2: #f1f3f8;--border: #e4e7ee;--text: #1f2430;--muted: #6b7280;--primary: #2563eb;--primary-hover: #1d4ed8;--accent: #7c3aed;--danger: #dc2626;--success: #16a34a;--warning: #d97706;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .04);--shadow: 0 8px 30px rgba(16, 24, 40, .08);--radius: 14px;--radius-sm: 8px;--maxw: 1100px}*{box-sizing:border-box}html,body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Inter,Segoe UI,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-size:14px;line-height:1.55}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;height:64px;padding:0 28px;gap:22px;background:#ffffffd9;-webkit-backdrop-filter:saturate(180%) blur(8px);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--border);flex-wrap:nowrap}nav a,nav 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