:root{
    --primary:#2F6FED;
    --primary-light:#EAF1FF;
    --primary-dark:#1E4FBE;
    --bg:#F5F6F9;
    --surface:#FFFFFF;
    --border:#E5E7EB;
    --text:#1F2430;
    --text-secondary:#6B7280;
    --text-muted:#9CA3AF;
    --success:#16A34A;
    --success-light:#E8F7EE;
    --warning:#D97706;
    --warning-light:#FEF3E2;
    --radius:10px;
    --radius-lg:16px;
  }
  *{box-sizing:border-box;}
  /* 可访问性：所有可交互元素在键盘聚焦时显示清晰的焦点环（鼠标点击不显示，不影响视觉） */
  :focus-visible{outline:2px solid var(--primary) !important;outline-offset:2px;border-radius:4px;}
  /* 可访问性：尊重"减少动态效果"系统设置，过渡/动画时长压到接近0 */
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{
      animation-duration:.01ms !important;
      animation-iteration-count:1 !important;
      transition-duration:.01ms !important;
      scroll-behavior:auto !important;
    }
  }
  html,body{margin:0;padding:0;height:100%;}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
    background:var(--bg);
    color:var(--text);
    display:flex;
    height:100vh;
    overflow:hidden;
  }
  svg.icon{width:20px;height:20px;stroke:currentColor;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;}

  /* ---------- sidebar ---------- */
  .sidebar{
    width:220px;
    background:var(--surface);
    border-right:1px solid var(--border);
    display:flex;
    flex-direction:column;
    flex-shrink:0;
    transition:width .2s ease;
    overflow:hidden;
  }
  .sidebar.collapsed{width:64px;}
  .brand{
    display:flex;align-items:center;gap:10px;
    padding:20px 18px;
    border-bottom:1px solid var(--border);
  }
  .sidebar.collapsed .brand{flex-direction:column;justify-content:center;padding:16px 10px;gap:10px;}
  .sidebar.collapsed .brand-text{display:none;}
  .brand .sidebar-toggle-btn{margin-left:auto;}
  .sidebar.collapsed .brand .sidebar-toggle-btn{margin-left:0;}
  .brand-logo{
    width:32px;height:32px;border-radius:8px;
    background:var(--primary);
    color:#fff;display:flex;align-items:center;justify-content:center;
    font-weight:700;font-size:14px;
    flex-shrink:0;
  }
  .brand-name{font-size:15px;font-weight:600;line-height:1.3;white-space:nowrap;}
  .brand-sub{font-size:11px;color:var(--text-muted);white-space:nowrap;}
  .nav{padding:12px;flex:1;display:flex;flex-direction:column;gap:4px;}
  .nav-item{
    display:flex;align-items:center;gap:12px;
    padding:10px 12px;border-radius:var(--radius);
    color:var(--text-secondary);cursor:pointer;
    font-size:14px;font-weight:500;
    border:1px solid transparent;
    transition:background .15s;
    white-space:nowrap;
    text-decoration:none;
  }
  .nav-item:hover{background:var(--bg);}
  .nav-item.active{background:var(--primary-light);color:var(--primary-dark);}
  .nav-item.active svg{stroke:var(--primary-dark);}
  .sidebar.collapsed .nav-item{justify-content:center;padding:10px;}
  .sidebar.collapsed .nav-label{display:none;}
  .sidebar-footer{
    padding:14px 18px;border-top:1px solid var(--border);
    font-size:12px;color:var(--text-muted);
    display:flex;align-items:center;justify-content:space-between;gap:8px;
  }
  .sidebar-footer .footer-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .sidebar.collapsed .sidebar-footer{justify-content:center;padding:14px 10px;}
  .sidebar.collapsed .sidebar-footer .footer-text{display:none;}
  .sidebar-toggle-btn{
    width:26px;height:26px;border-radius:6px;border:1px solid var(--border);
    background:var(--surface);display:flex;align-items:center;justify-content:center;
    cursor:pointer;color:var(--text-muted);flex-shrink:0;
  }
  .sidebar-toggle-btn:hover{border-color:var(--primary);color:var(--primary-dark);}
  .sidebar-toggle-btn svg{transition:transform .2s ease;}
  .sidebar.collapsed .sidebar-toggle-btn svg{transform:rotate(180deg);}

  /* ---------- main ---------- */
  .main{flex:1;display:flex;flex-direction:column;overflow:hidden;}
  .topbar{
    height:60px;flex-shrink:0;
    background:var(--surface);border-bottom:1px solid var(--border);
    display:flex;align-items:center;justify-content:space-between;
    padding:0 24px;
  }
  .topbar-title{font-size:16px;font-weight:600;}
  .topbar-sub{font-size:12px;color:var(--text-muted);margin-top:2px;}
  .topbar-right{display:flex;align-items:center;gap:14px;}
  .avatar{
    width:32px;height:32px;border-radius:50%;
    background:var(--primary-light);color:var(--primary-dark);
    display:flex;align-items:center;justify-content:center;
    font-size:12px;font-weight:600;
  }
  .content{flex:1;overflow-y:auto;padding:24px;}
  .page{display:none;}
  .page.active{display:block;}

  .hint-banner{
    background:var(--primary-light);color:var(--primary-dark);
    border-radius:var(--radius);padding:12px 16px;
    font-size:13px;margin-bottom:20px;
    display:flex;align-items:center;gap:10px;
  }

  /* ---------- cards ---------- */
  .card{
    background:var(--surface);border:1px solid var(--border);
    border-radius:var(--radius-lg);padding:20px;
  }
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
  .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
  @media (max-width:1100px){.grid-4{grid-template-columns:repeat(2,1fr);}}
  .scenario-card{
    cursor:pointer;transition:border-color .15s, transform .15s;
  }
  .scenario-card:hover{border-color:var(--primary);transform:translateY(-2px);}
  .scenario-icon{
    width:44px;height:44px;border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    margin-bottom:14px;
  }
  .scenario-icon.c1{background:#EAF1FF;color:#2F6FED;}
  .scenario-icon.c2{background:#FDEEE8;color:#D9622B;}
  .scenario-icon.c3{background:#E8F7EE;color:#16A34A;}
  .scenario-icon.c4{background:#EDE8FD;color:#7B61D6;}
  .scenario-title{font-size:15px;font-weight:600;margin-bottom:6px;}
  .scenario-desc{font-size:13px;color:var(--text-secondary);line-height:1.6;}
  .scenario-link{font-size:13px;color:var(--primary);font-weight:500;margin-top:14px;display:flex;align-items:center;gap:4px;}

  .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:20px;}
  .stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;}
  .stat-label{font-size:12px;color:var(--text-muted);margin-bottom:6px;}
  .stat-value{font-size:22px;font-weight:600;}

  /* ---------- 首页：知识库完整度 hero ---------- */
  .home-hero-top{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;flex-wrap:wrap;margin-bottom:14px;}
  .home-hero-label{font-size:13px;color:var(--text-muted);margin-bottom:4px;}
  .home-hero-value{font-size:38px;font-weight:600;line-height:1.1;}
  .home-hero-desc{font-size:13px;color:var(--text-secondary);margin-top:6px;max-width:380px;line-height:1.6;}
  .home-hero-actions{display:flex;gap:8px;flex-wrap:wrap;}
  .home-hero-bar{margin:0 0 18px;}
  .home-cat-mini-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;}
  .home-cat-mini{border:1px solid var(--border);border-radius:var(--radius);padding:10px 12px;cursor:pointer;background:var(--bg);}
  .home-cat-mini:hover{border-color:var(--primary);}
  .home-cat-mini-top{display:flex;justify-content:space-between;align-items:center;font-size:11.5px;margin-bottom:7px;gap:6px;}
  .home-cat-mini-name{font-weight:500;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}

  .home-alert-card{display:flex;flex-direction:column;gap:8px;margin-top:16px;}
  .home-alert-row{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:11px 14px;border-radius:var(--radius);
    background:var(--surface);border:1px solid var(--border);
  }
  .home-alert-row-left{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-secondary);}
  .home-alert-icon{width:26px;height:26px;border-radius:7px;background:var(--warning-light);color:var(--warning);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
  .home-alert-link{font-size:12.5px;color:var(--primary);font-weight:500;white-space:nowrap;background:none;border:none;cursor:pointer;font-family:inherit;}
  .home-alert-link:hover{color:var(--primary-dark);}
  .home-alert-empty{
    display:flex;align-items:center;gap:10px;font-size:13px;color:var(--success);
    background:var(--success-light);border-radius:var(--radius);padding:12px 14px;
  }

  h2.section-title{font-size:18px;font-weight:600;margin:28px 0 14px;}

  /* ---------- chat layout ---------- */
  .chat-layout{display:grid;grid-template-columns:220px 1fr 260px;gap:16px;height:calc(100vh - 165px);}
  .chat-layout.no-right{grid-template-columns:220px 1fr;}
  .side-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px;overflow-y:auto;}
  .side-panel-title{font-size:12px;color:var(--text-muted);font-weight:600;margin-bottom:10px;text-transform:uppercase;letter-spacing:.03em;}
  .chip{
    display:block;width:100%;text-align:left;
    background:var(--bg);border:1px solid var(--border);
    border-radius:var(--radius);padding:10px 12px;
    font-size:13px;color:var(--text);cursor:pointer;margin-bottom:8px;
  }
  .chip:hover{border-color:var(--primary);color:var(--primary-dark);}

  .chat-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);display:flex;flex-direction:column;overflow:hidden;}
  .chat-messages{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:16px;}
  .msg{display:flex;gap:10px;max-width:80%;}
  .msg.user{align-self:flex-end;flex-direction:row-reverse;}
  .msg-avatar{
    width:28px;height:28px;border-radius:50%;flex-shrink:0;
    display:flex;align-items:center;justify-content:center;
    font-size:11px;font-weight:700;
  }
  .msg.ai .msg-avatar{background:var(--primary);color:#fff;}
  .msg.user .msg-avatar{background:var(--border);color:var(--text-secondary);}
  .msg-bubble{
    padding:10px 14px;border-radius:12px;font-size:13.5px;line-height:1.6;
  }
  .msg.ai .msg-bubble{background:var(--bg);border:1px solid var(--border);border-top-left-radius:4px;}
  .msg.user .msg-bubble{background:var(--primary);color:#fff;border-top-right-radius:4px;}
  .msg-source{
    display:inline-flex;align-items:center;gap:4px;
    font-size:11px;color:var(--text-muted);margin-top:6px;
    background:var(--surface);border:1px solid var(--border);
    padding:3px 8px;border-radius:20px;
  }
  .chat-input-bar{
    border-top:1px solid var(--border);padding:14px 16px;
    display:flex;gap:10px;align-items:flex-end;
  }
  .chat-rte-wrap{
    flex:1;min-width:0;border:1px solid var(--border);border-radius:var(--radius);
    overflow:hidden;background:var(--surface);transition:border-color .2s ease-out;
  }
  .chat-rte-wrap:focus-within{border-color:var(--primary);}
  .chat-rte-toolbar{
    display:flex;align-items:center;gap:2px;flex-wrap:wrap;
    padding:5px 6px;border-bottom:1px solid var(--border);background:var(--bg);
  }
  .rte-btn{
    width:30px;height:30px;border:none;background:transparent;border-radius:6px;
    display:flex;align-items:center;justify-content:center;
    font-size:13px;color:var(--text-secondary);cursor:pointer;font-family:inherit;
    transition:background .15s ease-out,color .15s ease-out;
  }
  .rte-btn:hover{background:var(--primary-light);color:var(--primary-dark);}
  .rte-btn.active{background:var(--primary-light);color:var(--primary-dark);}
  .rte-btn svg{width:14px;height:14px;stroke:currentColor;}
  .rte-hint{margin-left:auto;font-size:11px;color:var(--text-muted);white-space:nowrap;padding:0 4px;}
  .chat-rte-box{
    min-height:80px;max-height:220px;overflow-y:auto;resize:vertical;
    padding:11px 14px;font-size:13.5px;line-height:1.6;outline:none;font-family:inherit;
  }
  .chat-rte-box:empty:before{content:attr(data-placeholder);color:var(--text-muted);}
  .chat-rte-box ul{margin:4px 0;padding-left:20px;}
  .chat-rte-box b,.chat-rte-box strong{font-weight:700;}
  .chat-attach-list{
    display:none;flex-wrap:wrap;gap:6px;
    padding:8px 10px 0;border-top:1px dashed var(--border);
  }
  .chat-attach-chip{
    display:flex;align-items:center;gap:5px;max-width:220px;
    background:var(--bg);border:1px solid var(--border);border-radius:20px;
    padding:4px 8px 4px 9px;font-size:12px;color:var(--text-secondary);
  }
  .chat-attach-chip svg{width:12px;height:12px;flex-shrink:0;color:var(--text-muted);}
  .chat-attach-name{max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .chat-attach-size{color:var(--text-muted);white-space:nowrap;}
  .chat-attach-remove{
    border:none;background:transparent;color:var(--text-muted);cursor:pointer;
    font-size:14px;line-height:1;padding:0 0 0 2px;font-family:inherit;
  }
  .chat-attach-remove:hover{color:#E0503A;}
  .msg-attach-list{display:flex;flex-direction:column;gap:6px;margin-top:6px;}
  .msg-attach-item{
    display:flex;align-items:center;gap:6px;background:var(--bg);
    border:1px solid var(--border);border-radius:var(--radius);
    padding:6px 10px;font-size:12px;color:var(--text-secondary);max-width:260px;
  }
  .msg-attach-item svg{width:13px;height:13px;flex-shrink:0;color:var(--text-muted);}
  .msg-attach-item .msg-attach-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .msg-attach-item .msg-attach-size{color:var(--text-muted);margin-left:auto;white-space:nowrap;}
  .send-btn{
    width:40px;height:40px;border-radius:var(--radius);flex-shrink:0;
    background:var(--primary);color:#fff;border:none;
    display:flex;align-items:center;justify-content:center;cursor:pointer;
  }
  .send-btn:hover{background:var(--primary-dark);}

  .quote-preview{margin-top:14px;}
  .side-panel-sub{font-size:11px;color:var(--text-muted);margin:-6px 0 12px;line-height:1.5;}
  .quote-meta{font-size:11px;color:var(--text-muted);margin-top:8px;line-height:1.5;}
  .quote-table{width:100%;font-size:12px;border-collapse:collapse;margin-top:10px;}
  .quote-table th{text-align:left;color:var(--text-muted);font-weight:500;padding:6px 0;border-bottom:1px solid var(--border);}
  .quote-table td{padding:8px 0;border-bottom:1px solid var(--border);}
  .quote-total{display:flex;justify-content:space-between;margin-top:10px;font-size:13px;font-weight:600;}

  .btn{
    display:inline-flex;align-items:center;gap:6px;
    padding:8px 14px;border-radius:var(--radius);
    border:1px solid var(--border);background:var(--surface);
    font-size:13px;cursor:pointer;color:var(--text);font-family:inherit;
  }
  .btn:hover{border-color:var(--primary);color:var(--primary-dark);}
  .btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);}
  .btn-primary:hover{background:var(--primary-dark);color:#fff;}

  /* ---------- 智能学堂 / 客户助手：场景区分优化 ---------- */
  .scene-tag{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;padding:5px 12px;border-radius:20px;margin-bottom:12px;font-weight:500;}
  .scene-tag.internal{background:var(--primary-light);color:var(--primary-dark);}
  .scene-tag.external{background:#FDEEE8;color:#D9622B;}

  .train-stats-row{display:flex;gap:16px;font-size:12.5px;color:var(--text-secondary);margin:0 0 12px;flex-wrap:wrap;}
  .train-stats-row b{color:var(--text);font-weight:600;}

  .train-topline{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px 16px;margin-bottom:12px;}
  .train-topline .scene-tag,.train-topline .train-stats-row{margin:0;}

  .related-q-wrap{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px;}
  .related-q-chip{font-size:11.5px;padding:5px 11px;border-radius:20px;background:var(--surface);border:1px solid var(--border);color:var(--primary-dark);cursor:pointer;font-family:inherit;}
  .related-q-chip:hover{border-color:var(--primary);background:var(--primary-light);}

  .fav-panel{margin-top:16px;padding-top:14px;border-top:1px solid var(--border);}
  .fav-empty{font-size:11.5px;color:var(--text-muted);line-height:1.6;}
  .fav-item{display:flex;align-items:center;gap:6px;width:100%;text-align:left;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:8px 10px;font-size:12px;color:var(--text);cursor:pointer;margin-bottom:6px;font-family:inherit;}
  .fav-item:hover{border-color:var(--warning);}
  .fav-item svg{color:var(--warning);flex-shrink:0;}

  .customer-onboard-tip{
    display:none;align-items:flex-start;gap:8px;
    background:var(--warning-light);border:1px solid var(--warning);border-radius:var(--radius);
    padding:10px 12px;margin-bottom:12px;font-size:12px;color:var(--text);
  }
  .customer-onboard-tip svg{color:var(--warning);flex-shrink:0;margin-top:1px;}
  .customer-onboard-tip-text{flex:1;line-height:1.5;}
  .customer-onboard-tip-btn{
    font-size:12px;color:var(--primary);background:none;border:none;cursor:pointer;
    font-family:inherit;white-space:nowrap;font-weight:600;padding:0;flex-shrink:0;
  }
  .customer-onboard-tip-btn:hover{text-decoration:underline;}
  .customer-onboard-tip-close{
    width:18px;height:18px;border:none;background:none;cursor:pointer;color:var(--text-muted);
    display:flex;align-items:center;justify-content:center;flex-shrink:0;padding:0;
  }
  .customer-onboard-tip-close:hover{color:var(--text);}

  .customer-info-card{border:1px solid var(--border);border-radius:var(--radius);padding:12px;background:var(--bg);margin-bottom:16px;}
  .customer-info-name{font-size:13.5px;font-weight:600;margin-bottom:2px;}
  .customer-info-meta{font-size:11.5px;color:var(--text-muted);margin-bottom:8px;}
  .customer-info-row{display:flex;justify-content:space-between;font-size:12px;color:var(--text-secondary);margin-bottom:4px;}
  .customer-info-row:last-child{margin-bottom:0;}
  .customer-info-source{font-size:10.5px;color:var(--text-muted);margin-top:8px;line-height:1.5;}
  .crm-import-link{font-size:11.5px;color:var(--primary);text-decoration:none;display:inline-block;}
  .crm-import-link:hover{color:var(--primary-dark);text-decoration:underline;}
  .customer-info-select-row{display:flex;align-items:center;gap:6px;margin-bottom:10px;}
  .customer-select{flex:1;border:1px solid var(--border);border-radius:var(--radius);padding:6px 8px;font-size:12.5px;font-family:inherit;background:var(--surface);color:var(--text);outline:none;min-width:0;}
  .customer-select:focus{border-color:var(--primary);}
  .customer-edit-btn{width:26px;height:26px;border-radius:6px;border:1px solid var(--border);background:var(--surface);display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text-muted);flex-shrink:0;}
  .customer-edit-btn:hover{border-color:var(--primary);color:var(--primary-dark);}
  .customer-edit-row{display:flex;flex-direction:column;gap:4px;margin-bottom:8px;}
  .customer-edit-row label{font-size:11px;color:var(--text-muted);}
  .customer-edit-row input{border:1px solid var(--border);border-radius:6px;padding:6px 8px;font-size:12px;font-family:inherit;outline:none;}
  .customer-edit-row input:focus{border-color:var(--primary);}

  .tone-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px;}
  .tone-chip{font-size:11.5px;padding:5px 11px;border-radius:20px;background:var(--surface);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;font-family:inherit;}
  .tone-chip:hover{border-color:var(--primary);color:var(--primary-dark);}
  .tone-chip.active{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary);}

  .send-status{display:inline-flex;align-items:center;gap:4px;font-size:11px;padding:3px 9px;border-radius:20px;margin-top:8px;}
  .send-status.pending{background:var(--warning-light);color:var(--warning);}
  .send-status.sent{background:var(--success-light);color:var(--success);}
  .mark-sent-btn{font-size:11px;color:var(--primary);background:none;border:none;cursor:pointer;font-family:inherit;margin-top:8px;margin-left:6px;padding:0;}
  .mark-sent-btn:hover{color:var(--primary-dark);text-decoration:underline;}

  .input-mode-tabs{display:flex;gap:4px;background:var(--bg);border-radius:var(--radius);padding:4px;margin-bottom:10px;width:fit-content;}
  .input-mode-btn{padding:6px 14px;border-radius:8px;font-size:12.5px;border:none;background:transparent;cursor:pointer;color:var(--text-secondary);font-family:inherit;}
  .input-mode-btn.active{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.06);}

  .msg.customer-msg .msg-bubble{background:#D9622B;color:#fff;}
  .msg.customer-msg .msg-avatar{background:#FDEEE8;color:#D9622B;}

  /* ---------- content creation ---------- */
  .tabs{display:flex;gap:4px;background:var(--bg);border-radius:var(--radius);padding:4px;width:fit-content;margin-bottom:20px;}
  .tab-btn{padding:8px 18px;border-radius:8px;font-size:13.5px;border:none;background:transparent;cursor:pointer;color:var(--text-secondary);font-family:inherit;}
  .tab-btn.active{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.06);}
  .subpage{display:none;}
  .subpage.active{display:block;}
  .form-row{margin-bottom:16px;}
  .form-label{font-size:13px;font-weight:500;margin-bottom:8px;display:block;}
  .form-row input[type=text], .form-row textarea{
    width:100%;border:1px solid var(--border);border-radius:var(--radius);
    padding:10px 12px;font-size:13.5px;font-family:inherit;outline:none;
  }
  .form-row input:focus, .form-row textarea:focus{border-color:var(--primary);}
  .style-chips{display:flex;gap:8px;flex-wrap:wrap;}
  .style-chip{
    padding:7px 14px;border-radius:20px;border:1px solid var(--border);
    font-size:12.5px;cursor:pointer;background:var(--surface);
  }
  .style-chip.selected{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary);}
  .result-box{
    margin-top:18px;border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:18px;background:var(--bg);min-height:120px;font-size:13.5px;line-height:1.8;
  }
  .result-box.loading{display:flex;align-items:center;justify-content:center;color:var(--text-muted);}
  .result-actions{display:flex;gap:8px;margin-top:14px;}

  .upload-zone{
    border:1.5px dashed var(--border);border-radius:var(--radius-lg);
    padding:32px;text-align:center;color:var(--text-secondary);
    background:var(--surface);cursor:pointer;
  }
  .upload-zone:hover{border-color:var(--primary);}
  .upload-zone svg{margin-bottom:10px;color:var(--primary);}

  .video-card{
    border:1px solid var(--border);border-radius:var(--radius-lg);
    overflow:hidden;width:260px;background:var(--surface);
  }
  .video-thumb{
    height:150px;background:linear-gradient(135deg,#DCE7FB,#EAF1FF);
    display:flex;align-items:center;justify-content:center;position:relative;
  }
  .video-play{
    width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.9);
    display:flex;align-items:center;justify-content:center;color:var(--primary);
  }
  .video-badge{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.6);color:#fff;font-size:11px;padding:2px 6px;border-radius:4px;}
  .video-info{padding:12px;}
  .video-status{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--success);margin-top:4px;}

  /* ---------- 视频生成：知识库产品图片选择 ---------- */
  .kb-image-trigger{
    width:100%;display:flex;align-items:center;gap:10px;
    border:1px solid var(--border);border-radius:var(--radius);padding:8px 12px;
    background:var(--surface);cursor:pointer;font-family:inherit;text-align:left;color:var(--text);
  }
  .kb-image-trigger:hover{border-color:var(--primary);}
  .kb-image-trigger-thumb{width:36px;height:36px;border-radius:6px;flex-shrink:0;}
  .kb-image-trigger-info{min-width:0;flex:1;}
  .kb-image-trigger-name{font-size:13px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .kb-image-trigger-cat{font-size:11px;color:var(--text-muted);margin-top:1px;}
  .kb-image-trigger-change{font-size:12px;color:var(--primary);flex-shrink:0;font-weight:500;}

  /* ---------- 选择产品图片 弹框 ---------- */
  .kb-image-modal-group{margin-bottom:20px;}
  .kb-image-modal-group:last-child{margin-bottom:0;}
  .kb-image-modal-cat{font-size:12px;color:var(--text-muted);font-weight:600;margin-bottom:10px;text-transform:uppercase;letter-spacing:.03em;}
  .kb-image-modal-row{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;}
  .kb-image-modal-thumb{
    position:relative;aspect-ratio:1/1;border-radius:var(--radius);overflow:hidden;
    border:2px solid transparent;cursor:pointer;display:flex;align-items:flex-end;
  }
  .kb-image-modal-thumb:hover{opacity:.9;}
  .kb-image-modal-thumb.selected{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light);}
  .kb-image-modal-name{
    width:100%;font-size:10px;color:#fff;background:rgba(0,0,0,.45);
    padding:3px 5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  }
  .kb-image-check{
    position:absolute;top:5px;right:5px;width:16px;height:16px;border-radius:50%;
    background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;
  }
  .kb-image-modal-upload-row{margin-top:6px;padding-top:16px;border-top:1px solid var(--border);}

  /* ---------- 内容创作：生成记录 ---------- */
  .content-lib-filters{display:flex;gap:8px;margin-bottom:16px;}
  .content-lib-filters .tag{cursor:pointer;user-select:none;}
  .content-lib-filters .tag.active-filter{background:var(--primary-light);color:var(--primary-dark);font-weight:600;}
  .content-lib-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
  @media (max-width:1100px){
    .content-lib-grid{grid-template-columns:repeat(3,1fr);}
  }
  @media (max-width:700px){
    .content-lib-grid{grid-template-columns:repeat(2,1fr);}
  }
  @media (max-width:480px){
    .content-lib-grid{grid-template-columns:1fr;}
  }
  .content-lib-card{border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px;background:var(--surface);}
  .content-lib-top{display:flex;align-items:flex-start;gap:10px;margin-bottom:4px;}
  .content-lib-icon{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
  .content-lib-icon.article{background:var(--primary-light);color:var(--primary);}
  .content-lib-icon.video{background:#FDEEE8;color:#D9622B;}
  .content-lib-icon.image{background:#EDE8FD;color:#7B61D6;}

  /* ---------- 内容创作：图片生成 ---------- */
  .image-gen-layout{display:flex;gap:16px;align-items:flex-start;}
  .image-gen-form-card{flex:1;min-width:0;flex-shrink:0;}
  .image-gen-preview-card{flex:1;min-width:0;display:flex;flex-direction:column;}
  .image-gen-preview-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px;}
  .image-gen-regen-btn{padding:5px 10px;font-size:11.5px;flex-shrink:0;}
  .image-gen-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;flex:1;align-content:start;}
  .image-gen-empty{
    grid-column:1/-1;font-size:12px;color:var(--text-muted);text-align:center;
    padding:36px 12px;border:1px dashed var(--border);border-radius:var(--radius-lg);line-height:1.6;
    display:flex;align-items:center;justify-content:center;min-height:160px;
  }
  .image-gen-card{
    position:relative;border-radius:var(--radius-lg);overflow:hidden;
    display:flex;align-items:center;justify-content:center;
    background:var(--bg);color:var(--text-muted);border:1px solid var(--border);
  }
  .image-gen-card.loading svg{animation:imgSpin 1s linear infinite;}
  @keyframes imgSpin{to{transform:rotate(360deg);}}
  .image-gen-tag{position:absolute;top:7px;left:7px;font-size:10px;background:rgba(255,255,255,.9);color:var(--text-secondary);padding:2px 7px;border-radius:20px;}
  .image-gen-overlay{
    position:absolute;inset:0;display:flex;align-items:flex-end;justify-content:flex-end;gap:6px;
    padding:7px;opacity:0;transition:opacity .15s ease-out;
    background:linear-gradient(to top,rgba(0,0,0,.4),transparent 55%);
  }
  .image-gen-card:hover .image-gen-overlay,
  .video-thumb:hover .image-gen-overlay{opacity:1;}
  .video-thumb .image-gen-overlay{inset:auto;top:auto;left:auto;right:0;bottom:0;width:auto;background:none;padding:8px;}
  .image-gen-icon-btn{
    width:26px;height:26px;border-radius:7px;border:none;background:rgba(255,255,255,.92);
    display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--text);flex-shrink:0;
  }
  .image-gen-icon-btn svg{width:13px;height:13px;}
  .image-gen-icon-btn:hover{background:#fff;color:var(--primary-dark);}
  .image-gen-icon-btn.picked{background:var(--success);color:#fff;}
  .content-lib-title{font-size:13.5px;font-weight:500;line-height:1.4;}
  .content-lib-date{font-size:11.5px;color:var(--text-muted);margin-top:2px;}
  .content-lib-snippet{font-size:12.5px;color:var(--text-secondary);line-height:1.6;margin:10px 0;}
  .content-lib-snippet.hide{display:none;}
  .content-lib-full{font-size:12.5px;color:var(--text-secondary);line-height:1.7;margin:10px 0;display:none;}
  .content-lib-full.show{display:block;}
  .content-lib-actions{display:flex;align-items:center;gap:8px;margin-top:4px;flex-wrap:wrap;}
  .content-lib-mini-btn{
    width:28px;height:28px;border-radius:7px;border:1px solid var(--border);
    background:var(--surface);display:flex;align-items:center;justify-content:center;
    cursor:pointer;color:var(--text-secondary);flex-shrink:0;
  }
  .content-lib-mini-btn:hover{border-color:var(--primary);color:var(--primary-dark);}
  .content-lib-mini-btn.danger:hover{border-color:#D9622B;color:#D9622B;}
  .content-lib-empty{grid-column:1/-1;text-align:center;color:var(--text-muted);font-size:13px;padding:40px 0;}

  /* ---------- kb management ---------- */
  .filter-chips{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;}
  table.kb-table{width:100%;border-collapse:collapse;font-size:13px;}
  table.kb-table th{text-align:left;color:var(--text-muted);font-weight:500;font-size:12px;padding:10px 8px;border-bottom:1px solid var(--border);}
  table.kb-table td{padding:12px 8px;border-bottom:1px solid var(--border);}
  .file-name{display:flex;align-items:center;gap:8px;}
  .file-icon{width:30px;height:30px;border-radius:7px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
  .file-icon.pdf{background:#FDEEE8;color:#D9622B;}
  .file-icon.doc{background:#EAF1FF;color:#2F6FED;}
  .file-icon.xls{background:#E8F7EE;color:#16A34A;}
  .file-icon.link{background:#E6F1FB;color:#185FA5;}
  .tag{font-size:11px;padding:3px 9px;border-radius:20px;background:var(--bg);color:var(--text-secondary);}
  .filter-chips .tag{cursor:pointer;user-select:none;transition:background .15s,color .15s;}
  .filter-chips .tag.active-filter{background:var(--primary-light);color:var(--primary-dark);font-weight:600;}
  .status{display:inline-flex;align-items:center;gap:5px;font-size:12px;}
  .status.done{color:var(--success);}
  .status.learning{color:var(--warning);}
  .kb-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;}

  /* ---------- kb tabs (独立于内容创作的 tab，避免互相干扰) ---------- */
  .kb-tab-btn{padding:8px 18px;border-radius:8px;font-size:13.5px;border:none;background:transparent;cursor:pointer;color:var(--text-secondary);font-family:inherit;}
  .kb-tab-btn.active{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.06);}
  .kb-subpage{display:none;}
  .kb-subpage.active{display:block;}

  /* ---------- 智能学堂 tabs：自由问答 / 新人学习路径 ---------- */
  .train-tab-btn{padding:8px 18px;border-radius:8px;font-size:13.5px;border:none;background:transparent;cursor:pointer;color:var(--text-secondary);font-family:inherit;}
  .train-tab-btn.active{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.06);}
  .train-subpage{display:none;}
  .train-subpage.active{display:block;}

  /* ---------- 新人学习路径 ---------- */
  .path-module-card{
    border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px;
    margin-bottom:12px;background:var(--surface);transition:border-color .15s,box-shadow .15s;
  }
  .path-module-card.active{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);}
  .path-module-card.done{border-color:var(--success);}
  .path-module-head{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
  .path-module-num{
    width:28px;height:28px;border-radius:50%;background:var(--bg);color:var(--text-secondary);
    display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex-shrink:0;
  }
  .path-module-card.active .path-module-num{background:var(--primary);color:#fff;}
  .path-module-card.done .path-module-num{background:var(--success);color:#fff;}
  .path-module-title{font-size:14.5px;font-weight:600;}
  .path-module-desc{font-size:12.5px;color:var(--text-muted);margin-top:2px;}
  .path-module-status{
    margin-left:auto;font-size:11.5px;padding:3px 10px;border-radius:20px;
    background:var(--bg);color:var(--text-muted);flex-shrink:0;white-space:nowrap;display:inline-flex;align-items:center;gap:4px;
  }
  .path-module-status.done{background:var(--success-light);color:var(--success);}
  .q-chip{
    display:inline-flex;align-items:center;
    background:var(--bg);border:1px solid var(--border);border-radius:20px;
    padding:7px 14px;font-size:12.5px;color:var(--text);cursor:pointer;font-family:inherit;
  }
  .q-chip:hover{border-color:var(--primary);color:var(--primary-dark);}
  .path-complete-banner{
    display:flex;align-items:center;gap:10px;background:var(--success-light);color:var(--success);
    border-radius:var(--radius);padding:14px 16px;font-size:13.5px;
  }

  .path-lesson{margin-bottom:14px;}
  .path-lesson-badge{display:inline-flex;align-items:center;gap:5px;font-size:11px;color:var(--primary-dark);background:var(--primary-light);padding:3px 10px;border-radius:20px;margin-bottom:10px;font-weight:600;}
  .path-lesson-text{font-size:13.5px;color:var(--text);line-height:1.75;margin-bottom:14px;}

  .path-points{margin-bottom:14px;}
  .path-points-title{font-size:12px;color:var(--text-muted);margin-bottom:8px;font-weight:600;}
  .path-point-item{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--text-secondary);line-height:1.6;margin-bottom:6px;}
  .path-point-item:last-child{margin-bottom:0;}
  .path-point-dot{width:5px;height:5px;border-radius:50%;background:var(--primary);margin-top:8px;flex-shrink:0;}

  .path-qa-section{border-top:1px solid var(--border);padding-top:12px;margin-top:2px;}
  .path-qa-toggle{display:flex;align-items:center;gap:6px;width:100%;text-align:left;background:none;border:none;cursor:pointer;font-family:inherit;font-size:12.5px;color:var(--text-muted);padding:0;font-weight:600;}
  .path-qa-toggle:hover{color:var(--primary-dark);}
  .path-qa-toggle svg{transition:transform .2s;flex-shrink:0;}
  .path-qa-section.open .path-qa-toggle svg{transform:rotate(180deg);}
  .path-qa-body{display:none;padding-top:12px;}
  .path-qa-section.open .path-qa-body{display:block;}
  .path-module-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:14px;}
  .path-qa-title{font-size:12px;color:var(--text-muted);margin-bottom:8px;font-weight:600;}
  .path-qa-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px;}
  .path-qa-log{display:flex;flex-direction:column;gap:8px;margin-bottom:10px;}
  .path-qa-item{background:var(--bg);border-radius:var(--radius);padding:10px 12px;}
  .path-qa-q{font-size:12.5px;font-weight:500;margin-bottom:4px;}
  .path-qa-a{font-size:12.5px;color:var(--text-secondary);line-height:1.6;}
  .path-qa-loading{color:var(--text-muted);}
  .path-qa-source{font-size:11px;color:var(--text-muted);margin-left:4px;}
  .path-qa-input-row{display:flex;gap:8px;margin-bottom:10px;}
  .path-qa-input-row input{
    flex:1;border:1px solid var(--border);border-radius:var(--radius);
    padding:8px 12px;font-size:12.5px;outline:none;font-family:inherit;
  }
  .path-qa-input-row input:focus{border-color:var(--primary);}
  .path-qa-send{
    width:34px;height:34px;border-radius:var(--radius);background:var(--primary);color:#fff;
    border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;
  }
  .path-qa-send:hover{background:var(--primary-dark);}
  .path-more-link{font-size:12px;color:var(--text-muted);text-decoration:none;display:inline-block;background:none;border:none;cursor:pointer;font-family:inherit;padding:0;}
  .path-more-link:hover{color:var(--primary);}
  .path-module-head-title{flex:1;font-size:14.5px;font-weight:600;}

  /* ---------- 新人学习路径：按板块折叠 ---------- */
  .path-section{border:1px solid var(--border);border-radius:var(--radius-lg);margin-bottom:14px;overflow:hidden;background:var(--surface);}
  .path-section.done{border-color:var(--success);}
  .path-section-head{width:100%;display:flex;align-items:center;gap:12px;padding:16px 18px;background:none;border:none;cursor:pointer;font-family:inherit;text-align:left;}
  .path-section-chevron{color:var(--text-muted);transition:transform .2s;flex-shrink:0;}
  .path-section.open .path-section-chevron{transform:rotate(180deg);}
  .path-section-head-text{flex:1;}
  .path-section-title{font-size:14.5px;font-weight:600;}
  .path-section-desc{font-size:12px;color:var(--text-muted);margin-top:2px;}
  .path-section-progress{font-size:11.5px;font-weight:600;color:var(--text-secondary);background:var(--bg);padding:3px 10px;border-radius:20px;display:inline-flex;align-items:center;gap:4px;flex-shrink:0;}
  .path-section-progress.done{background:var(--success-light);color:var(--success);}
  .path-section-body{display:none;padding:0 18px 18px;}
  .path-section.open .path-section-body{display:block;}
  .path-section-body .path-module-card:last-child{margin-bottom:0;}

  /* ---------- 新人学习路径：小节测验 ---------- */
  .path-sub-done-summary{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--success);flex-wrap:wrap;}
  .path-review-link{margin-left:auto;font-size:12px;color:var(--text-muted);background:none;border:none;cursor:pointer;font-family:inherit;text-decoration:underline;padding:0;}
  .path-review-link:hover{color:var(--primary-dark);}
  .path-quiz-hint{font-size:12px;color:var(--text-muted);margin-bottom:14px;}
  .path-quiz-q{margin-bottom:16px;}
  .path-quiz-q:last-of-type{margin-bottom:8px;}
  .path-quiz-q-text{font-size:13.5px;font-weight:500;margin-bottom:8px;}
  .path-quiz-options{display:flex;flex-direction:column;gap:6px;}
  .path-quiz-option{
    display:flex;align-items:center;justify-content:space-between;gap:8px;text-align:left;
    padding:9px 12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);
    font-size:13px;color:var(--text);cursor:pointer;font-family:inherit;
    transition:border-color .15s ease-out,background .15s ease-out;width:100%;
  }
  .path-quiz-option:hover:not(:disabled){border-color:var(--primary);}
  .path-quiz-option.selected{border-color:var(--primary);background:var(--primary-light);}
  .path-quiz-option.correct{border-color:var(--success);background:var(--success-light);color:var(--success);}
  .path-quiz-option.wrong{border-color:#E0503A;background:#FDEEEA;color:#C0392B;}
  .path-quiz-option:disabled{cursor:default;}
  .path-quiz-option-text{flex:1;}
  .path-quiz-result{font-size:13px;padding:10px 12px;border-radius:var(--radius);margin-bottom:12px;}
  .path-quiz-result.correct{background:var(--success-light);color:var(--success);}
  .path-quiz-result.wrong{background:#FDEEEA;color:#C0392B;}
  .path-quiz-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}

  /* ---------- 完整性检测 ---------- */
  .gauge-card{display:flex;align-items:center;gap:24px;margin-bottom:20px;}
  .gauge-value{font-size:34px;font-weight:600;flex-shrink:0;}
  .gauge-bar-wrap{flex:1;}
  .gauge-bar-track{height:8px;border-radius:20px;background:var(--bg);overflow:hidden;}
  .gauge-bar-fill{height:100%;background:var(--primary);border-radius:20px;}
  .gauge-desc{font-size:12.5px;color:var(--text-muted);margin-top:8px;}

  .cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-bottom:24px;}
  .cat-card{border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px;background:var(--surface);}
  .cat-card-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:10px;}
  .cat-name{font-size:14px;font-weight:600;}
  .cat-count{font-size:12px;color:var(--text-muted);margin-top:2px;}
  .cat-badge{font-size:11px;padding:3px 9px;border-radius:20px;display:inline-flex;align-items:center;gap:4px;flex-shrink:0;}
  .cat-badge.good{background:var(--success-light);color:var(--success);}
  .cat-badge.warning{background:var(--warning-light);color:var(--warning);}
  .cat-badge.bad{background:#FDEEE8;color:#D9622B;}
  .cat-bar-track{height:6px;border-radius:20px;background:var(--bg);overflow:hidden;margin:10px 0 8px;}
  .cat-bar-fill{height:100%;border-radius:20px;}
  .cat-bar-fill.good{background:var(--success);}
  .cat-bar-fill.warning{background:var(--warning);}
  .cat-bar-fill.bad{background:#D9622B;}
  .cat-note{font-size:12px;color:var(--text-secondary);line-height:1.5;}

  .gap-list{display:flex;flex-direction:column;gap:10px;}
  .gap-item{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius);}
  .gap-item-left{display:flex;align-items:center;gap:10px;}
  .gap-icon{width:30px;height:30px;border-radius:8px;background:var(--warning-light);color:var(--warning);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
  .gap-title{font-size:13px;font-weight:500;}
  .gap-note{font-size:12px;color:var(--text-muted);margin-top:2px;}
  .gap-count{font-size:12px;color:var(--text-muted);flex-shrink:0;}
  .gap-item-right{display:flex;align-items:center;gap:12px;flex-shrink:0;}
  .gap-upload-btn{padding:6px 12px;font-size:12px;}

  /* ---------- 知识冲突检测 ---------- */
  .conflict-list{display:flex;flex-direction:column;gap:10px;}
  .conflict-item{border:1px solid var(--border);border-radius:var(--radius);padding:14px;}
  .conflict-item.pending{border-color:#F0997B;background:#FAECE7;}
  .conflict-top{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:8px;}
  .conflict-item-left{display:flex;align-items:flex-start;gap:10px;}
  .conflict-icon{width:30px;height:30px;border-radius:8px;background:#F0997B;color:#4A1B0C;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
  .conflict-title{font-size:13px;font-weight:500;}
  .conflict-detail{font-size:12.5px;color:var(--text-secondary);line-height:1.7;margin-top:2px;}
  .conflict-detail b{color:var(--text);font-weight:500;}
  .conflict-status{font-size:11px;padding:3px 9px;border-radius:20px;flex-shrink:0;display:inline-flex;align-items:center;gap:4px;}
  .conflict-status.pending{background:#F0997B;color:#4A1B0C;}
  .conflict-status.done{background:var(--success-light);color:var(--success);}
  .conflict-resolve{margin-top:10px;padding-top:10px;border-top:1px solid var(--border);}
  .conflict-resolve-title{font-size:12px;color:var(--text-muted);margin-bottom:8px;}
  .conflict-resolved-note{display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--success);margin-top:8px;}

  /* ---------- AI校准 ---------- */
  .calib-intro{font-size:13px;color:var(--text-secondary);line-height:1.7;margin-bottom:18px;}
  .calib-list{display:flex;flex-direction:column;gap:12px;}
  .calib-card{border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px;background:var(--surface);}
  .calib-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;}
  .calib-tags{display:flex;gap:6px;align-items:center;}
  .calib-status{font-size:11px;padding:3px 9px;border-radius:20px;display:inline-flex;align-items:center;gap:4px;}
  .calib-status.pending{background:var(--warning-light);color:var(--warning);}
  .calib-status.done{background:var(--success-light);color:var(--success);}
  .calib-q{font-size:13.5px;font-weight:500;margin-bottom:6px;}
  .calib-a{font-size:13px;color:var(--text-secondary);line-height:1.6;margin-bottom:10px;}
  .calib-form{margin-top:12px;padding-top:12px;border-top:1px solid var(--border);}
  .calib-empty{font-size:13px;color:var(--text-muted);text-align:center;padding:30px 0;}

  /* ---------- chat 反馈按钮 ---------- */
  .msg-feedback{display:flex;align-items:center;gap:4px;margin-top:8px;}
  .fb-btn{
    width:24px;height:24px;border-radius:6px;border:1px solid var(--border);
    background:var(--surface);display:flex;align-items:center;justify-content:center;
    cursor:pointer;color:var(--text-muted);
  }
  .fb-btn:hover{border-color:var(--primary);color:var(--primary-dark);}
  .fb-btn.picked-up{background:var(--success-light);border-color:var(--success);color:var(--success);}
  .fb-btn.picked-down{background:#FDEEE8;border-color:#D9622B;color:#D9622B;}
  .fb-btn.favorited{background:var(--warning-light);border-color:var(--warning);color:var(--warning);}
  .fb-note{font-size:11px;color:var(--text-muted);}

  /* ---------- kb toolbar (校准入口 + 搜索 + 上传) ---------- */
  .kb-toolbar{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
  .btn-outline-green{border:1px solid var(--primary);color:var(--primary);background:var(--surface);}
  .btn-outline-green:hover{background:var(--primary-light);}
  .btn-green{background:var(--primary);color:#fff;border-color:var(--primary);}
  .btn-green:hover{background:var(--primary-dark);color:#fff;}
  .search-wrap{position:relative;flex:1;}
  .search-wrap svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-muted);width:15px;height:15px;}
  .search-wrap input{
    width:100%;border:1px solid var(--border);border-radius:var(--radius);
    padding:9px 12px 9px 34px;font-size:13px;outline:none;font-family:inherit;
  }
  .search-wrap input:focus{border-color:var(--primary);}

  /* ---------- 上传知识 弹框 ---------- */
  .modal-overlay{
    display:none;position:fixed;inset:0;background:rgba(15,20,30,.45);
    align-items:center;justify-content:center;z-index:1000;padding:20px;
  }
  .modal-overlay.active{display:flex;}
  .modal-box{
    background:var(--surface);border-radius:var(--radius-lg);
    width:560px;max-width:100%;max-height:90vh;overflow-y:auto;
    padding:24px;
  }
  .modal-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:22px;}
  .modal-title{font-size:16px;font-weight:600;margin-bottom:4px;}
  .modal-sub{font-size:12.5px;color:var(--text-secondary);line-height:1.5;}
  .modal-close{
    width:28px;height:28px;border-radius:6px;border:none;background:transparent;
    cursor:pointer;color:var(--text-muted);display:flex;align-items:center;justify-content:center;flex-shrink:0;
  }
  .modal-close:hover{background:var(--bg);}

  .steps{display:flex;align-items:flex-start;margin-bottom:26px;}
  .step{display:flex;flex-direction:column;align-items:center;flex:1;position:relative;}
  .step-line{position:absolute;top:4px;left:-50%;width:100%;height:2px;background:var(--border);z-index:0;}
  .step:first-child .step-line{display:none;}
  .step.done .step-line, .step.active .step-line{background:var(--success);}
  .step-dot{width:9px;height:9px;border-radius:50%;background:var(--border);margin-bottom:8px;position:relative;z-index:1;}
  .step.active .step-dot, .step.done .step-dot{background:var(--success);}
  .step-label{font-size:10.5px;color:var(--text-muted);text-align:center;}
  .step.active .step-label{color:var(--success);font-weight:500;}
  .step.done .step-label{color:var(--text-secondary);}

  .modal-body{min-height:180px;}
  .upload-progress-track{height:8px;border-radius:20px;background:var(--bg);overflow:hidden;margin:16px 0 8px;}
  .upload-progress-fill{height:100%;background:var(--success);border-radius:20px;width:0%;transition:width .3s;}
  .confirm-card{border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;background:var(--bg);margin-bottom:16px;}
  .confirm-row{display:flex;align-items:center;gap:8px;font-size:13px;margin-bottom:8px;}
  .confirm-row:last-child{margin-bottom:0;}
  .modal-center{text-align:center;padding:20px 0;}
  .modal-center .status-icon{
    width:48px;height:48px;border-radius:50%;background:var(--success-light);color:var(--success);
    display:flex;align-items:center;justify-content:center;margin:0 auto 14px;
  }

  /* ---------- 上传来源切换：文件 / 网址 / 文案 ---------- */
  .upload-source-tabs{display:flex;gap:4px;background:var(--bg);border-radius:var(--radius);padding:4px;margin-bottom:16px;}
  .upload-source-btn{
    flex:1;padding:8px 10px;border-radius:8px;font-size:13px;border:none;background:transparent;
    cursor:pointer;color:var(--text-secondary);font-family:inherit;display:flex;align-items:center;justify-content:center;gap:6px;
  }
  .upload-source-btn.active{background:var(--surface);color:var(--text);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.06);}
  .source-hint{font-size:12px;color:var(--text-muted);margin:-8px 0 14px;}
  .form-checkbox-row{
    display:flex;align-items:flex-start;gap:8px;font-size:12.5px;color:var(--text-secondary);
    margin:-4px 0 14px;cursor:pointer;line-height:1.5;
  }
  .form-checkbox-row input[type="checkbox"]{width:15px;height:15px;flex-shrink:0;margin-top:1px;accent-color:var(--primary);cursor:pointer;}

  /* ---------- 顺手教会AI（知识随用随学） ---------- */
  .teach-form{margin-top:10px;padding-top:10px;border-top:1px dashed var(--border);}
  .teach-form textarea{
    width:100%;border:1px solid var(--border);border-radius:var(--radius);
    padding:8px 10px;font-size:13px;font-family:inherit;outline:none;resize:vertical;
  }
  .teach-form textarea:focus{border-color:var(--primary);}
  .teach-form .btn{margin-top:8px;}
  .teach-success{display:flex;align-items:center;gap:6px;color:var(--success);font-size:12.5px;margin-top:8px;}

  /* ---------- 后台自动沉淀提示（toast） ---------- */
  .toast-wrap{position:fixed;bottom:24px;right:24px;z-index:2000;display:flex;flex-direction:column;gap:8px;align-items:flex-end;}
  .toast{
    background:var(--text);color:#fff;padding:10px 16px;border-radius:var(--radius);
    font-size:12.5px;display:flex;align-items:center;gap:8px;
    opacity:0;transform:translateY(8px);transition:opacity .3s,transform .3s;
    box-shadow:0 6px 20px rgba(0,0,0,.18);max-width:280px;
  }
  .toast.show{opacity:1;transform:translateY(0);}

  .ambient-note{
    display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-muted);
    margin-top:14px;
  }