:root{
    --bg:#faf8f3;
    --card:#ffffff;
    --ink:#1a1a1a;
    --muted:#6b6b6b;
    --line:#e8e2d4;
    --accent:#b8332e;
    --accent2:#8a2521;
    --gold:#c9a14a;
    --green:#16a34a;
    --blue:#2563eb;
    --code-bg:#1a1a1a;
    --code-fg:#f4ede0;
    --user-bubble:#fff5f0;
    --bot-bubble:#ffffff;
  }
  *{box-sizing:border-box;margin:0;padding:0;}
  html,body{height:100%;background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Heiti SC","Noto Sans CJK SC",sans-serif;line-height:1.65;font-size:14px;}
  button{font-family:inherit;cursor:pointer;}
  input,textarea,select{font-family:inherit;font-size:14px;}

  /* === 布局 === */
  .app{display:flex;flex-direction:column;height:100vh;background:var(--bg);}
  header{
    background:linear-gradient(135deg,var(--accent) 0%,var(--accent2) 100%);
    color:#fff;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;
    box-shadow:0 2px 8px rgba(0,0,0,.1);z-index:10;flex-shrink:0;
  }
  header .logo{display:flex;align-items:center;gap:12px;}
  header .logo-icon{width:36px;height:36px;background:rgba(255,255,255,.2);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;}
  header h1{font-size:20px;font-weight:900;letter-spacing:2px;}
  header .subtitle{font-size:11px;opacity:.85;letter-spacing:1px;margin-top:2px;}
  header .actions{display:flex;gap:8px;}
  header .actions button{background:rgba(255,255,255,.15);color:#fff;border:1px solid rgba(255,255,255,.25);padding:7px 14px;border-radius:8px;font-size:12px;font-weight:600;transition:.2s;}
  header .actions button:hover{background:rgba(255,255,255,.28);}
  .prov-switch{display:flex;gap:5px;margin-top:5px;}
  .prov-pill{padding:2px 9px;font-size:11px;border-radius:11px;cursor:pointer;background:rgba(255,255,255,.16);color:#fff;font-weight:600;letter-spacing:0.5px;transition:.2s;border:1px solid rgba(255,255,255,.15);user-select:none;}
  .prov-pill:hover{background:rgba(255,255,255,.28);}
  .prov-pill.active{background:#fff;color:var(--accent);border-color:#fff;}

  /* 状态栏 */
  .status-bar{
    background:#fff8e1;border-bottom:1px solid var(--line);
    padding:6px 24px;font-size:12px;color:#5a4500;display:flex;align-items:center;gap:8px;flex-shrink:0;
  }
  .status-bar.idle{display:none;}
  .status-bar.error{background:#fdeaea;color:#a00;}
  .status-bar.success{background:#e8f3ed;color:#063;}
  .status-bar .spinner{width:12px;height:12px;border:2px solid currentColor;border-top-color:transparent;border-radius:50%;animation:spin 0.8s linear infinite;}
  @keyframes spin{to{transform:rotate(360deg);}}

  .main{flex:1;display:flex;overflow:hidden;min-height:0;}

  /* === 侧栏 === */
  .sidebar{
    width:280px;background:var(--card);border-right:1px solid var(--line);
    display:flex;flex-direction:column;overflow:hidden;flex-shrink:0;
  }
  .side-tabs{display:flex;border-bottom:1px solid var(--line);background:#faf6ed;flex-shrink:0;}
  .side-tab{flex:1;padding:11px 4px;text-align:center;font-size:12.5px;font-weight:700;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;transition:.2s;white-space:nowrap;}
  .side-tab.active{color:var(--accent);border-bottom-color:var(--accent);background:#fff;}
  .side-content{flex:1;overflow-y:auto;padding:14px;}

  .search-box{position:relative;margin-bottom:10px;}
  .search-box input{width:100%;padding:8px 10px 8px 30px;border:1px solid var(--line);border-radius:8px;background:#fafafa;}
  .search-box::before{content:"🔍";position:absolute;left:9px;top:8px;font-size:13px;opacity:.5;}
  .city-filter{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:10px;}
  .city-chip{padding:3px 8px;background:#faf6ed;border:1px solid var(--line);border-radius:12px;font-size:11px;cursor:pointer;color:var(--muted);transition:.15s;}
  .city-chip:hover{background:#fff;color:var(--ink);}
  .city-chip.active{background:var(--accent);color:#fff;border-color:var(--accent);}
  .attr-list{display:flex;flex-direction:column;gap:6px;}
  .attr-item{padding:8px 10px;background:#fafafa;border-radius:6px;font-size:12.5px;cursor:pointer;line-height:1.5;transition:.15s;border-left:3px solid transparent;}
  .attr-item:hover{background:#fff;border-left-color:var(--accent);}
  .attr-item .name{font-weight:700;color:var(--ink);}
  .attr-item .meta{color:var(--muted);font-size:11px;margin-top:3px;}
  .attr-item .level{background:var(--accent);color:#fff;font-size:9px;padding:1px 5px;border-radius:8px;font-weight:700;margin-right:4px;}
  .attr-item .level-4a{background:var(--gold);}
  .attr-item .level-3a{background:#888;}

  /* === 线路图卡片 === */
  .route-card{
    background:#fff;border:1px solid var(--line);border-radius:10px;
    padding:12px 14px;margin-bottom:11px;cursor:pointer;transition:.18s;
    border-left:4px solid var(--route-color,var(--accent));
    position:relative;
  }
  .route-card:hover{
    transform:translateY(-1px);box-shadow:0 4px 14px rgba(0,0,0,.08);
    border-left-color:var(--accent2);
  }
  .route-head{display:flex;align-items:center;gap:6px;margin-bottom:2px;}
  .route-head .icon{font-size:18px;}
  .route-head .name{font-size:14px;font-weight:900;color:var(--ink);letter-spacing:.5px;}
  .route-head .tag{
    background:var(--gold);color:#fff;font-size:10px;padding:1px 7px;
    border-radius:8px;font-weight:700;margin-left:auto;
  }
  .route-head .days{
    background:var(--accent);color:#fff;font-size:10px;padding:2px 8px;
    border-radius:10px;font-weight:700;letter-spacing:.5px;
  }
  .route-line{
    display:flex;align-items:center;flex-wrap:wrap;gap:0;
    margin:9px 0 7px;font-size:11px;
  }
  .route-city{
    background:var(--route-color,var(--accent));color:#fff;padding:3px 9px;
    border-radius:11px;font-weight:700;white-space:nowrap;font-size:11px;
    box-shadow:0 1px 2px rgba(0,0,0,.1);
  }
  .route-arrow{
    color:var(--muted);font-size:10px;padding:0 2px;opacity:.6;flex-shrink:0;
  }
  .route-highlights{
    display:flex;gap:5px;flex-wrap:wrap;margin:6px 0;
  }
  .route-highlight{
    background:#fef3c7;color:#854d0e;padding:2px 8px;border-radius:10px;
    font-size:10.5px;font-weight:600;
  }
  .route-audience{
    color:var(--muted);font-size:11px;margin-top:5px;
    padding-top:6px;border-top:1px dashed var(--line);
  }
  .route-audience b{color:var(--ink);}
  .route-cta{
    margin-top:8px;text-align:center;font-size:11px;
    background:var(--bg);padding:5px;border-radius:6px;
    color:var(--accent);font-weight:700;
  }

  /* === 聊天区 === */
  .chat-area{flex:1;display:flex;flex-direction:column;background:var(--bg);overflow:hidden;min-width:0;}
  .messages{flex:1;overflow-y:auto;padding:20px 0;scroll-behavior:smooth;}
  .messages-inner{max-width:780px;margin:0 auto;padding:0 20px;}

  .welcome{text-align:center;padding:60px 20px;color:var(--muted);}
  .welcome .icon{font-size:48px;margin-bottom:16px;}
  .welcome h2{color:var(--ink);font-size:22px;margin-bottom:8px;font-weight:900;letter-spacing:1px;}
  .welcome p{font-size:14px;line-height:1.8;}

  .msg{display:flex;gap:12px;margin-bottom:18px;align-items:flex-start;position:relative;}
  .msg-copy{
    position:absolute;top:-6px;right:0;
    font-size:11px;line-height:1;padding:5px 10px;border-radius:6px;
    border:1px solid var(--line);background:#fff;color:#999;cursor:pointer;
    opacity:0;transition:opacity .15s,color .15s,border-color .15s;user-select:none;
  }
  .msg:hover .msg-copy{opacity:1;}
  .msg-copy:hover{color:var(--accent);border-color:var(--accent);}
  .msg .avatar{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:900;flex-shrink:0;color:#fff;}
  .msg.user .avatar{background:var(--ink);}
  .msg.bot .avatar{background:linear-gradient(135deg,var(--accent) 0%,var(--accent2) 100%);}
  .msg .bubble{
    max-width:85%;padding:12px 16px;border-radius:12px;
    line-height:1.7;font-size:14px;word-break:break-word;
  }
  .msg.user .bubble{background:var(--user-bubble);border:1px solid #f0d9c8;}
  .msg.bot .bubble{background:var(--bot-bubble);border:1px solid var(--line);box-shadow:0 1px 3px rgba(0,0,0,.04);}
  .msg.bot .bubble h1,.msg.bot .bubble h2,.msg.bot .bubble h3{margin:8px 0 6px;font-weight:800;line-height:1.4;}
  .msg.bot .bubble h1{font-size:18px;color:var(--accent);}
  .msg.bot .bubble h2{font-size:16px;color:var(--accent);}
  .msg.bot .bubble h3{font-size:15px;}
  .msg.bot .bubble p{margin:4px 0;}
  .msg.bot .bubble ul,.msg.bot .bubble ol{margin:6px 0 6px 20px;}
  .msg.bot .bubble li{margin:3px 0;}
  .msg.bot .bubble strong{color:var(--accent);font-weight:700;}
  .msg.bot .bubble em{color:var(--ink);font-style:normal;font-weight:600;}
  .msg.bot .bubble code{background:#f0ebe0;padding:1px 5px;border-radius:4px;font-family:"SF Mono",Consolas,monospace;font-size:12.5px;color:var(--accent2);}
  .msg.bot .bubble pre{background:var(--code-bg);color:var(--code-fg);padding:10px 14px;border-radius:8px;overflow-x:auto;margin:8px 0;}
  .msg.bot .bubble blockquote{border-left:3px solid var(--gold);padding-left:10px;margin:6px 0;color:var(--muted);background:#faf6ed;padding:8px 12px;border-radius:0 6px 6px 0;}
  .msg.bot .bubble table{border-collapse:collapse;margin:8px 0;width:100%;font-size:13px;}
  .msg.bot .bubble th,.msg.bot .bubble td{border:1px solid var(--line);padding:6px 10px;text-align:left;}
  .msg.bot .bubble th{background:#faf6ed;font-weight:700;}

  /* 输入区 */
  .input-area{
    border-top:1px solid var(--line);background:var(--card);
    padding:14px 20px;flex-shrink:0;
  }
  .input-inner{max-width:780px;margin:0 auto;}
  .input-box{
    display:flex;align-items:flex-end;gap:8px;
    border:2px solid var(--line);border-radius:12px;padding:8px 12px;
    background:#fafafa;transition:.2s;
  }
  .input-box:focus-within{border-color:var(--accent);background:#fff;}
  .input-box textarea{
    flex:1;border:none;background:transparent;outline:none;resize:none;
    min-height:24px;max-height:140px;line-height:1.6;font-size:14px;
  }
  .input-box button{
    width:36px;height:36px;border-radius:8px;border:none;
    background:var(--accent);color:#fff;font-size:18px;
    display:flex;align-items:center;justify-content:center;
    transition:.2s;flex-shrink:0;
  }
  .input-box button:hover:not(:disabled){background:var(--accent2);}
  .input-box button:disabled{background:#ccc;cursor:not-allowed;}
  .input-tip{font-size:11px;color:var(--muted);margin-top:6px;text-align:center;}

  /* 设置弹窗 */
  .modal{
    position:fixed;inset:0;background:rgba(0,0,0,.5);
    display:none;align-items:center;justify-content:center;z-index:100;
  }
  .modal.show{display:flex;}
  .modal-card{
    background:var(--card);border-radius:14px;width:90%;max-width:480px;
    box-shadow:0 20px 60px rgba(0,0,0,.3);overflow:hidden;max-height:90vh;overflow-y:auto;
  }
  .modal-head{padding:16px 20px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;}
  .modal-head h3{font-size:16px;font-weight:800;}
  .modal-head .close{background:none;border:none;font-size:22px;color:var(--muted);cursor:pointer;line-height:1;}
  .modal-body{padding:20px;}
  .modal-foot{padding:14px 20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:8px;background:#fafafa;flex-wrap:wrap;}
  .form-group{margin-bottom:14px;}
  .form-group label{display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:var(--ink);}
  .form-group .hint{font-size:11px;color:var(--muted);margin-top:4px;line-height:1.5;}
  .form-group .hint a{color:var(--accent);}
  .form-group input,.form-group select{
    width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:#fafafa;font-size:14px;
  }
  .form-group input:focus,.form-group select:focus{outline:none;border-color:var(--accent);background:#fff;}
  .btn{padding:8px 18px;border-radius:8px;border:none;font-weight:700;font-size:13px;transition:.2s;}
  .btn-primary{background:var(--accent);color:#fff;}
  .btn-primary:hover{background:var(--accent2);}
  .btn-secondary{background:#f0f0f0;color:var(--ink);}
  .btn-secondary:hover{background:#e0e0e0;}
  .btn-success{background:var(--green);color:#fff;}
  .btn-success:hover{background:#0d7a36;}

  /* Toast */
  .toast{
    position:fixed;bottom:30px;left:50%;transform:translateX(-50%);
    background:var(--code-bg);color:#fff;padding:10px 20px;border-radius:8px;
    font-size:13px;z-index:200;opacity:0;transition:.3s;pointer-events:none;max-width:80%;text-align:center;
  }
  .toast.show{opacity:1;}
  .toast.error{background:#dc2626;}

  /* === ⭐ 快捷 tab 改成"会话窗口列表" === */
  .conv-tab-header{
    display:flex;gap:6px;margin-bottom:8px;
  }
  .conv-tab-header button{
    flex:1;padding:8px 4px;border:none;border-radius:7px;
    background:var(--accent);color:#fff;font-size:12px;font-weight:700;
    cursor:pointer;transition:.15s;
  }
  .conv-tab-header button:hover{background:var(--accent2);}
  .conv-tab-search{
    width:100%;padding:7px 10px;border:1px solid var(--line);
    border-radius:6px;background:#fafafa;font-size:12px;
    margin-bottom:8px;outline:none;
  }
  .conv-tab-search:focus{border-color:var(--accent);background:#fff;}
  .conv-tab-list{
    display:flex;flex-direction:column;gap:6px;
  }
  .conv-tab-item{
    background:#faf6ed;border:1px solid var(--line);border-radius:8px;
    padding:9px 10px;cursor:pointer;transition:.15s;
    border-left:3px solid transparent;position:relative;
  }
  .conv-tab-item:hover{background:#fff;border-color:var(--accent);}
  .conv-tab-item.active{
    background:#fff;border-color:var(--accent);border-left-color:var(--accent);
    box-shadow:0 1px 4px rgba(184,51,46,.12);
  }
  .ct-row1{
    display:flex;align-items:center;gap:6px;
    margin-bottom:4px;
  }
  .ct-title{
    flex:1;font-size:13px;font-weight:700;color:var(--ink);
    overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  }
  .ct-active-tag{
    background:var(--accent);color:#fff;font-size:9.5px;
    padding:1px 5px;border-radius:7px;font-weight:700;flex-shrink:0;
  }
  .ct-prov{
    font-size:10px;padding:1px 6px;border-radius:7px;
    background:var(--accent);color:#fff;font-weight:700;flex-shrink:0;
  }
  .ct-prov.gz{background:#d63384;}
  .ct-preview{
    font-size:11.5px;color:var(--muted);line-height:1.5;
    overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
    margin-bottom:4px;
  }
  .ct-meta{
    display:flex;justify-content:space-between;align-items:center;
    font-size:10.5px;color:var(--muted);
  }
  .ct-actions{display:flex;gap:3px;}
  .ct-actions button{
    padding:2px 7px;font-size:10.5px;
    border:1px solid var(--line);background:#fff;
    border-radius:4px;color:var(--muted);cursor:pointer;font-weight:600;
  }
  .ct-actions button:hover{color:var(--accent);border-color:var(--accent);}
  .ct-actions button.del:hover{color:#dc2626;border-color:#dc2626;}
  .ct-empty{
    padding:30px 14px;text-align:center;color:var(--muted);
    font-size:12px;line-height:1.7;
  }

  /* === 移动端抽屉 === */
  .menu-btn{
    display:none;background:rgba(255,255,255,.15);color:#fff;
    border:1px solid rgba(255,255,255,.25);border-radius:8px;
    width:34px;height:34px;font-size:16px;line-height:1;flex-shrink:0;
  }
  .sidebar-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:60;}
  .sidebar-mask.show{display:block;}
  /* 停止生成按钮态 */
  .input-box button.stop{background:var(--muted);font-size:13px;}
  .input-box button.stop:hover{background:#555;}
  /* 打字指示器 */
  .typing{display:inline-flex;gap:4px;align-items:center;padding:3px 0;}
  .typing i{width:6px;height:6px;border-radius:50%;background:var(--muted);opacity:.4;animation:blink 1.2s infinite;}
  .typing i:nth-child(2){animation-delay:.2s;}
  .typing i:nth-child(3){animation-delay:.4s;}
  @keyframes blink{0%,100%{opacity:.25;transform:translateY(0);}50%{opacity:1;transform:translateY(-2px);}}
  /* 会话"生成中"标记 */
  .ct-streaming{
    background:var(--green);color:#fff;font-size:9.5px;
    padding:1px 6px;border-radius:7px;font-weight:700;flex-shrink:0;
  }
  /* 会话摘要（人数/日期/目的地），方便快速认客户 */
  .ct-client{
    font-size:10px;color:var(--accent);background:#fdf3e7;
    padding:1px 6px;border-radius:7px;font-weight:600;flex-shrink:1;
    max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  }

  @media (max-width:760px){
    .menu-btn{display:flex;align-items:center;justify-content:center;}
    .sidebar{
      position:fixed;top:0;bottom:0;left:0;z-index:70;width:84%;max-width:330px;
      transform:translateX(-102%);transition:transform .25s ease;
      box-shadow:6px 0 24px rgba(0,0,0,.18);
    }
    .sidebar.open{transform:translateX(0);}
    .messages-inner{padding:0 14px;}
    .input-area{padding:12px 14px;}
    header{padding:10px 14px;}
    header h1{font-size:16px;}
    header .subtitle{font-size:10px;}
    header .actions{gap:5px;}
    header .actions button{padding:6px 9px;font-size:11px;}
    header .actions button .lbl{display:none;}
    .msg .bubble{max-width:92%;}
  }

  /* === 客户会话管理 modal === */
  .conv-list{display:flex;flex-direction:column;gap:8px;max-height:60vh;overflow-y:auto;}
  .conv-item{
    display:flex;align-items:center;gap:10px;padding:10px 12px;
    background:#fafafa;border:1px solid var(--line);border-radius:8px;
    cursor:pointer;transition:.15s;
  }
  .conv-item:hover{background:#fff;border-color:var(--accent);}
  .conv-item.active{background:#fff5f0;border-color:var(--accent);border-left:3px solid var(--accent);}
  .conv-item .conv-info{flex:1;min-width:0;}
  .conv-item .conv-title{font-size:13.5px;font-weight:700;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .conv-item .conv-meta{font-size:11px;color:var(--muted);margin-top:2px;display:flex;gap:8px;align-items:center;}
  .conv-item .conv-meta .prov-tag{background:var(--gold);color:#fff;padding:1px 6px;border-radius:8px;font-weight:600;font-size:10px;}
  .conv-item .conv-meta .prov-tag.gz{background:#c92a2a;}
  .conv-item .conv-actions{display:flex;gap:4px;flex-shrink:0;}
  .conv-item .conv-actions button{
    background:none;border:1px solid transparent;padding:4px 7px;border-radius:5px;
    font-size:11px;color:var(--muted);cursor:pointer;transition:.15s;
  }
  .conv-item .conv-actions button:hover{background:#fff;border-color:var(--line);color:var(--accent);}
  .conv-item .conv-actions button.del:hover{color:#dc2626;border-color:#dc2626;}
  .conv-empty{text-align:center;color:var(--muted);padding:40px 20px;font-size:13px;line-height:1.7;}
  .conv-search-box{position:relative;margin-bottom:10px;}
  .conv-search-box input{width:100%;padding:8px 10px 8px 30px;border:1px solid var(--line);border-radius:8px;background:#fafafa;}
  .conv-search-box::before{content:"🔍";position:absolute;left:9px;top:8px;font-size:13px;opacity:.5;}
  .modal-card-wide{width:90%;max-width:560px;}