:root{--bg: #0f1218;--panel: #161b24;--panel-2: #1b1f29;--border: #2a2f3a;--text: #e6e9f0;--muted: #8b93a7;--accent: #4f9cf9;--ok: #3fb950;--bad: #f85149}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px}a{color:inherit;text-decoration:none}.nav{display:flex;align-items:center;gap:24px;padding:14px 24px;border-bottom:1px solid var(--border);background:var(--panel);position:sticky;top:0;z-index:10}.nav-brand{font-weight:700;letter-spacing:.5px;color:var(--accent)}.nav-links{display:flex;gap:16px}.nav-links a{color:var(--muted);padding:4px 0;border-bottom:2px solid transparent}.nav-links a.active{color:var(--text);border-bottom-color:var(--accent)}.container{max-width:1200px;margin:0 auto;padding:24px}.page-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:20px}.page-head 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var(--border);border-radius:6px}.metric-group-head{display:flex;align-items:center;gap:8px;width:100%;background:transparent;border:0;padding:7px 12px;color:var(--text);font-size:12px;font-family:inherit;cursor:pointer;text-align:left}.metric-group-head:hover{background:#4f9cf90f}.metric-group-arrow{color:var(--muted);width:12px;display:inline-block;text-align:center}.metric-group-name{font-weight:600}.metric-group-count{margin-left:auto;color:var(--muted);font-size:11px}.metric-empty{padding:16px;text-align:center}.metric-picker{display:flex;flex-wrap:wrap;gap:6px;padding:4px 12px 12px}.chip{display:inline-flex;align-items:center;gap:6px;background:var(--panel-2);border:1px solid var(--border);border-radius:999px;padding:4px 10px;font-size:12px;color:var(--muted);cursor:pointer}.chip.active{color:var(--text);border-color:var(--accent)}.chip input{accent-color:var(--accent)}.chart-empty,.spark-empty{color:var(--muted);padding:20px 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