: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 h1{font-size:22px;margin:0}.global-stats{display:flex;gap:16px;color:var(--muted)}.global-stats .ok{color:var(--ok)}.muted{color:var(--muted)}.back{color:var(--accent);display:inline-block;margin-bottom:12px}.loading,.error{color:var(--muted);padding:40px 0;text-align:center}.error{color:var(--bad)}.host-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}.host-card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:16px;transition:border-color .15s,transform .15s}.host-card:hover{border-color:var(--accent);transform:translateY(-2px)}.host-card-head{display:flex;align-items:center;justify-content:space-between}.host-name{font-weight:600;font-size:15px}.host-meta{color:var(--muted);font-size:12px;margin:6px 0 14px}.badge{font-size:11px;padding:2px 8px;border-radius:999px}.badge.online{background:#3fb95026;color:var(--ok)}.badge.offline{background:#f8514926;color:var(--bad)}.host-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.stat-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}.stat-card{background:var(--panel-2);border:1px solid var(--border);border-radius:8px;padding:12px 14px;min-width:110px}.stat-label{color:var(--muted);font-size:12px}.stat-value{font-size:20px;font-weight:600;margin-top:4px}.stat-unit{font-size:13px;color:var(--muted);font-weight:400}.panel{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:16px 18px;margin-top:18px}.panel h2{font-size:15px;margin:0 0 14px}.metric-picker{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.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 0;text-align:center}.host-select{background:var(--panel-2);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 10px}