:root{--bg:#f6f5f2;--sidebar:#f3f2ee;--surface:#fff;--line:#e4e1da;--text:#1c1b19;--muted:#6f6c66;--accent:#1d4ed8;--accent-hover:#1e40af;--accent-soft:#e7eefc;--danger:#b42318;--danger-soft:#fef3f2;--ok:#067647;--ok-soft:#ecfdf3;--radius:8px;--control-h:36px;--sidebar-w:220px;--font:"Segoe UI", system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif}*{box-sizing:border-box}html,body{min-height:100%;margin:0}body{font-family:var(--font);color:var(--text);background:var(--bg);font-size:14px;line-height:1.5}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}code{background:#efece6;border-radius:4px;padding:2px 6px;font-size:12px}.shell{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-w);background:var(--sidebar);border-right:1px solid var(--line);flex-direction:column;flex-shrink:0;height:100vh;padding:20px 12px 16px;display:flex;position:sticky;top:0}.brand{letter-spacing:.01em;padding:4px 10px 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16px;display:grid}.login-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;width:100%;max-width:400px;padding:28px 28px 22px}.login-card h1{letter-spacing:-.02em;margin:0 0 18px;font-size:20px;font-weight:650}.login-note{color:var(--muted);margin:4px 0 0;font-size:12px}.login-split{border:0;border-top:1px solid var(--line);margin:20px 0}.login-alt{text-align:center;margin:0}