:root{--bg:#f5f7fb;--panel:#fff;--border:#e5eaf2;--text:#1e293b;--muted:#64748b;--blue:#2563eb;--blue-soft:#eff6ff;--sidebar:#0f172a;--sidebar-text:#cbd5e1;--radius:10px;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,system-ui,-apple-system,sans-serif;font-weight:400;line-height:1.5}*{box-sizing:border-box}html,body,#root{min-height:100%;margin:0}button{font:inherit}a{color:inherit;text-decoration:none}.app-shell{min-height:100vh;display:flex}.sidebar{background:var(--sidebar);width:220px;color:var(--sidebar-text);flex-direction:column;flex-shrink:0;display:flex;overflow-y:auto}.sidebar-brand{border-bottom:1px solid #ffffff14;align-items:center;gap:10px;padding:18px 16px;display:flex}.brand-mark{color:#fff;background:linear-gradient(135deg,#3b82f6,#8b5cf6);border-radius:8px;place-items:center;width:36px;height:36px;font-weight:700;display:grid}.brand-title{color:#fff;font-size:14px;font-weight:600}.brand-sub{opacity:.7;font-size:12px}.sidebar-nav{padding:12px 8px 24px}.nav-group{margin-bottom:14px}.nav-group-title{text-transform:uppercase;letter-spacing:.04em;color:#94a3b8;padding:4px 10px 6px;font-size:11px}.nav-item{color:var(--sidebar-text);border-radius:6px;margin-bottom:2px;padding:7px 10px;font-size:13px;display:block}.nav-item:hover{color:#fff;background:#ffffff0f}.nav-item.active{color:#fff;background:#2563eb59}.nav-item.soon{opacity:.75}.main{flex:1;min-width:0;padding:20px 24px 40px;overflow-x:hidden}.page-header{justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;display:flex}.page-title{margin:0;font-size:22px;font-weight:650}.chips{gap:8px;display:flex}.chip{border:1px solid var(--border);color:var(--muted);cursor:pointer;background:#fff;border-radius:999px;padding:6px 14px;font-size:13px}.chip.active{background:var(--blue-soft);color:var(--blue);border-color:#93c5fd;font-weight:600}.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;padding:16px 18px 12px;position:relative;box-shadow:0 1px 2px #0f172a0a}.panel-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;display:flex}.panel-title{margin:0;font-size:16px;font-weight:650}.panel-hint{color:var(--muted);font-size:12px}.tabs{background:#f1f5f9;border-radius:8px;gap:4px;padding:3px;display:flex}.tab{cursor:pointer;color:var(--muted);background:0 0;border:none;border-radius:6px;padding:6px 12px;font-size:13px}.tab.active{color:var(--blue);background:#fff;font-weight:600;box-shadow:0 1px 2px #0f172a14}.empty-shell{height:280px;color:var(--muted);border:1px dashed var(--border);background:#f8fafc;border-radius:8px;place-items:center;display:grid}.diagnostics-head{align-items:flex-start}.diag-hint{color:var(--muted);margin:4px 0 0;font-size:13px}.diag-hint strong{color:#dc2626}.btn-ghost{border:1px solid var(--border);color:var(--blue);cursor:pointer;background:#fff;border-radius:6px;padding:6px 12px;font-size:13px}.btn-ghost:hover{background:var(--blue-soft)}.btn-primary{background:var(--blue);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:8px 16px}.diag-list{flex-direction:column;gap:10px;margin:12px 0 0;padding:0;list-style:none;display:flex}.diag-item{border:1px solid var(--border);background:#fafbfc;border-radius:8px;padding:12px 14px}.diag-item-top{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.diag-level{font-size:14px;font-weight:650}.badges{flex-wrap:wrap;gap:6px;display:flex}.badge{border-radius:999px;padding:2px 8px;font-size:11px;font-weight:600}.badge-churn_spike{color:#dc2626;background:#fef2f2}.badge-video_high{color:#7c3aed;background:#faf5ff}.badge-clear_low{color:#ea580c;background:#fff7ed}.diag-summary{color:#334155;margin:8px 0 6px;font-size:13px}.diag-metrics{color:var(--muted);flex-wrap:wrap;gap:14px;font-size:12px;display:flex}.diag-empty{color:var(--muted);padding:12px}.funnel-wrap{padding:8px 4px 16px;overflow-x:auto}.funnel-track{align-items:flex-end;gap:6px;min-height:220px;padding-top:12px;display:flex}.funnel-bar{cursor:pointer;border:none;border-radius:4px 4px 2px 2px;flex:0 0 28px;width:28px;min-height:12px;padding:0;transition:transform .12s,filter .12s;position:relative}.funnel-bar:hover{filter:brightness(1.05);transform:translateY(-3px)}.funnel-label{color:var(--muted);white-space:nowrap;font-size:10px;position:absolute;bottom:-20px;left:50%;transform:translate(-50%)}.funnel-tooltip{color:#fff;pointer-events:none;z-index:50;white-space:nowrap;background:#0f172a;border-radius:8px;padding:8px 10px;font-size:12px;position:fixed;transform:translate(-50%,-100%);box-shadow:0 8px 20px #0f172a40}.state{text-align:center;color:var(--muted);padding:40px}.state.error{color:#dc2626}.coming-soon{text-align:center;place-items:center;gap:8px;min-height:60vh;display:grid}.coming-soon h1{margin:0}.coming-soon p{color:var(--muted);margin:0 0 12px}@media (width<=900px){.sidebar{width:180px}.main{padding:12px}}