:root{
  --bg:#f3f5f9; --card:#fff; --line:#e6e9f0; --text:#1f2430; --muted:#8a90a3;
  --brand:#3b82f6; --brand-dark:#2f6fe0; --danger:#ef4444; --ok:#16a34a; --warn:#f59e0b;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);display:flex;min-height:100vh}
.sidebar{width:230px;background:#191d2b;color:#cdd3e4;display:flex;flex-direction:column;flex-shrink:0;position:sticky;top:0;height:100vh}
.brand{display:flex;gap:10px;align-items:center;padding:20px 18px;border-bottom:1px solid #2a2f42}
.brand-logo{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,#3b82f6,#8b5cf6);display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff}
.brand-name{font-weight:700;color:#fff;font-size:15px}
.brand-sub{font-size:11px;color:#8a90a3}
.nav{flex:1;padding:12px 10px;display:flex;flex-direction:column;gap:4px}
.nav a{padding:10px 14px;border-radius:8px;color:#b7bdd0;text-decoration:none;cursor:pointer;font-size:14px;transition:.15s}
.nav a:hover{background:#262b3d;color:#fff}
.nav a.active{background:var(--brand);color:#fff}
.sidebar-foot{padding:16px;border-top:1px solid #2a2f42}
.sidebar-foot a{color:#8a90a3;text-decoration:none;font-size:13px}
.sidebar-foot a:hover{color:#fff}
.main{flex:1;padding:26px 30px;max-width:1280px}
.main h2{font-size:20px;margin-bottom:18px}
.tab-panel{display:none}
.tab-panel.active{display:block}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.stat .num{font-size:28px;font-weight:700;color:var(--brand)}
.stat .lbl{color:var(--muted);font-size:13px;margin-top:4px}
.stat.pending .num{color:var(--warn)}
.stat.done .num{color:var(--ok)}
.panel-hint{margin-top:20px;background:#eef4ff;border:1px solid #d7e3ff;border-radius:10px;padding:16px;color:#46506b;line-height:1.7;font-size:14px}
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}
.toolbar .muted{margin-left:6px}
.btn{border:1px solid var(--line);background:#fff;color:#3a4150;padding:8px 14px;border-radius:8px;cursor:pointer;font-size:13px;transition:.15s}
.btn:hover{border-color:var(--brand);color:var(--brand)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:var(--brand-dark)}
.btn.sm{padding:5px 10px;font-size:12px}
.btn.danger{color:var(--danger);border-color:#f4c6c6}
.select{border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:13px;background:#fff}
.tbl{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden;font-size:13px}
.tbl th{background:#f7f8fb;text-align:left;padding:11px 12px;color:#5a6172;font-weight:600;border-bottom:1px solid var(--line)}
.tbl td{padding:11px 12px;border-bottom:1px solid #f0f2f7;vertical-align:top}
.tbl tr:last-child td{border-bottom:none}
.tbl tr:hover td{background:#fafbff}
.tag{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;background:#eef1f7;color:#5a6172}
.tag.pending{background:#fff3e0;color:#c47b00}
.tag.processing{background:#e3f2fd;color:#1565c0}
.tag.done{background:#e6f6ec;color:#15803d}
.tag.human{background:#ede9fe;color:#6d28d9}
.tag.high{background:#fde8e8;color:#c0392b}
.session-layout{display:grid;grid-template-columns:300px 1fr;gap:16px;align-items:start}
.session-list{background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.session-item{padding:12px 14px;border-bottom:1px solid #f0f2f7;cursor:pointer}
.session-item:hover{background:#f7f9ff}
.session-item.active{background:#eef4ff}
.session-item .preview{font-size:13px;color:#2a3040;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.session-item .meta{font-size:11px;color:var(--muted)}
.session-detail{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px;min-height:300px}
.session-detail .empty{color:var(--muted);text-align:center;padding:60px 0}
.msg{display:flex;margin-bottom:12px}
.msg .who{flex-shrink:0;width:64px;font-weight:600;font-size:12px;color:var(--muted)}
.msg .body{flex:1;background:#f6f7fb;border-radius:8px;padding:10px 12px;white-space:pre-wrap;font-size:13px;line-height:1.6}
.msg.user .body{background:#e8f0fe}
.msg .thinking{font-size:12px;color:#9a6b00;background:#fff8e8;border-left:3px solid var(--warn);padding:8px 10px;border-radius:4px;margin-top:6px;white-space:pre-wrap}
.msg .tool{font-size:12px;background:#eef1f7;border:1px solid var(--line);border-radius:6px;padding:8px 10px;margin-top:6px}
.msg .tool b{color:var(--brand)}
.modal-mask{position:fixed;inset:0;background:rgba(15,18,28,.5);display:flex;align-items:center;justify-content:center;z-index:50}
.modal{background:#fff;border-radius:14px;width:540px;max-width:94vw;max-height:86vh;overflow:auto;padding:22px}
.modal h3{margin-bottom:14px}
.modal-body{font-size:13px;color:#343b4a;line-height:1.6;max-height:40vh;overflow:auto}
.modal-body .kv{margin-bottom:8px}
.modal-body .kv b{color:#5a6172}
.form{display:flex;flex-direction:column;gap:12px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:#5a6172}
.form input,.form textarea,.form select{border:1px solid var(--line);border-radius:8px;padding:9px 11px;font-size:13px;font-family:inherit}
.modal-foot{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}
.modal-foot .btn:first-child{margin-right:auto}
.muted{color:var(--muted);font-size:13px}
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%);background:#1f2937;color:#fff;padding:10px 18px;border-radius:8px;font-size:13px;opacity:0;transition:.25s;pointer-events:none;z-index:100}
.toast.show{opacity:1}
.hidden{display:none !important}
.pill{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}

.form-row{display:flex;gap:12px}
.form-row label{flex:1}

/* 手机端顶栏 / 抽屉 */
.mobile-bar{display:none}
.sidebar-backdrop{display:none}
.sidebar .sidebar-close{display:none;margin-left:auto;border:1px solid #2a2f42;background:#262b3d;color:#cdd3e4;width:32px;height:32px;border-radius:8px;cursor:pointer}

@media (max-width:900px){
  body{flex-direction:column;min-height:100dvh}
  .mobile-bar{
    display:flex;align-items:center;gap:10px;position:sticky;top:0;z-index:30;
    background:#191d2b;color:#fff;padding:10px 12px;
    padding-top:calc(10px + env(safe-area-inset-top));
    border-bottom:1px solid #2a2f42;
  }
  .mobile-bar .menu-btn{
    width:36px;height:36px;border:1px solid #2a2f42;border-radius:9px;
    background:#262b3d;color:#fff;font-size:16px;cursor:pointer;
  }
  .mobile-bar .title{font-size:14px;font-weight:700;flex:1;min-width:0;
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .sidebar-backdrop{
    display:block;position:fixed;inset:0;z-index:40;background:rgba(0,0,0,.45);
    opacity:0;pointer-events:none;transition:opacity .2s;
  }
  .sidebar-backdrop.show{opacity:1;pointer-events:auto}
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;z-index:50;width:min(84vw,260px);
    transform:translateX(-105%);transition:transform .22s ease;
    height:100dvh;box-shadow:8px 0 24px rgba(0,0,0,.35);
  }
  .sidebar.open{transform:translateX(0)}
  .sidebar .sidebar-close{display:inline-flex;align-items:center;justify-content:center}
  .brand{padding-right:12px}
  .main{padding:16px 14px calc(20px + env(safe-area-inset-bottom));max-width:none;width:100%}
  .main h2{font-size:18px;margin-bottom:14px}
  .stat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .stat{padding:14px}
  .stat .num{font-size:22px}
  .session-layout{grid-template-columns:1fr}
  .toolbar{gap:8px}
  .toolbar .select{min-width:0!important;width:100%;max-width:100%}
  .tbl{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .form-row{flex-direction:column}
  .panel-hint{font-size:13px;padding:12px}
  .modal{width:96vw;padding:16px}
}

@media (max-width:480px){
  .stat-grid{grid-template-columns:1fr 1fr}
  .nav a{font-size:13px;padding:9px 12px}
}