/* ═══════════════════════════════════════════
   美域高 · 管理后台
   ═══════════════════════════════════════════ */

:root {
    --primary: #2563eb; --primary-dark: #1d4ed8;
    --sidebar-w: 220px;
    --text: #1e293b; --text2: #64748b; --text3: #94a3b8;
    --border: #e2e8f0;
    --bg: #f1f5f9; --white: #fff;
    --danger: #dc2626; --success: #16a34a; --warning: #d97706;
    --radius: 8px;
}

*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{text-decoration:none;color:inherit}
svg{flex-shrink:0}

/* ═══ SIDEBAR ═══ */
.sidebar{
    position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-w);
    background:#1e293b;color:#cbd5e1;z-index:100;
    display:flex;flex-direction:column;overflow-y:auto;
}
.sidebar-brand{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid rgba(255,255,255,.08)}
.brand-icon{width:36px;height:36px;border-radius:8px;background:var(--primary);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.brand-name{font-size:16px;font-weight:700;color:#fff}
.brand-sub{font-size:11px;color:#94a3b8}
.sidebar-nav{flex:1;padding:8px;display:flex;flex-direction:column;gap:2px}
.nav-item{
    display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:6px;
    color:#cbd5e1;font-size:14px;cursor:pointer;border:none;background:none;
    width:100%;text-align:left;transition:.15s;
}
.nav-item:hover{background:#334155;color:#fff}
.nav-item.active{background:var(--primary);color:#fff}
.sidebar-footer{padding:8px;border-top:1px solid rgba(255,255,255,.08)}

/* ═══ MAIN ═══ */
.main-content{margin-left:var(--sidebar-w);padding:0;min-height:100vh}

/* ═══ TAB CONTENT ═══ */
.tab-content{display:none}
.tab-content.active{display:block;padding:28px 32px}

.page-title{font-size:22px;font-weight:700;margin-bottom:24px;display:flex;align-items:center;gap:10px}
.page-title .btn{margin-left:auto}

/* ═══ STATS ROW ═══ */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.stat-item{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px}
.stat-num{font-size:28px;font-weight:700;line-height:1.2}
.stat-label{font-size:13px;color:var(--text2);margin-top:4px}

/* ═══ PANELS ═══ */
.panel{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin-bottom:16px}
.panel-title{font-size:15px;font-weight:600;margin-bottom:12px}
.panel-body{color:var(--text2);font-size:13px}
.panel-desc{color:var(--text2);font-size:13px;margin-bottom:12px}
.charts-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}

/* ═══ TOOLBAR ═══ */
.toolbar{display:flex;align-items:center;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.search-box{position:relative;flex:1;min-width:180px;max-width:320px}
.search-box svg{position:absolute;left:10px;top:50%;transform:translateY(-50%);color:var(--text3)}
.search-box input{width:100%;padding:8px 12px 8px 34px;border:1px solid var(--border);border-radius:6px;font-size:14px;color:var(--text);background:var(--white);outline:none}
.search-box input:focus{border-color:var(--primary)}

/* ═══ BUTTONS ═══ */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;border:1px solid transparent;transition:.15s;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-outline{background:var(--white);color:var(--text);border-color:var(--border)}
.btn-outline:hover{background:var(--bg)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#b91c1c}
.btn-sm{padding:4px 10px;font-size:12px}
.btn-ghost{background:transparent;color:var(--text2)}
.btn-ghost:hover{background:var(--bg)}

/* ═══ TABLE ═══ */
.data-table{width:100%;border-collapse:collapse;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.data-table th{text-align:left;padding:10px 14px;font-size:12px;font-weight:600;color:var(--text2);background:var(--bg);border-bottom:1px solid var(--border);text-transform:uppercase;letter-spacing:.3px}
.data-table td{padding:10px 14px;font-size:14px;border-bottom:1px solid var(--border)}
.data-table tr:last-child td{border-bottom:none}
.data-table tr:hover td{background:#f8fafc}

/* ═══ KNOWLEDGE ═══ */
.knowledge-content{min-height:200px}
.knowledge-table{width:100%;border-collapse:collapse;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.knowledge-table th{text-align:left;padding:10px 14px;font-size:12px;font-weight:600;color:var(--text2);background:var(--bg);border-bottom:1px solid var(--border)}
.knowledge-table td{padding:10px 14px;font-size:14px;border-bottom:1px solid var(--border)}
.knowledge-table tr:last-child td{border-bottom:none}
.knowledge-table tr:hover td{background:#f8fafc}

/* Card view */
.knowledge-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:12px}
.knowledge-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px}
.knowledge-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.knowledge-card-category{font-size:11px;font-weight:600;padding:1px 8px;border-radius:8px;background:#eff6ff;color:var(--primary)}
.knowledge-card-question{font-size:14px;font-weight:600;margin-bottom:4px}
.knowledge-card-answer{font-size:13px;color:var(--text2);line-height:1.5}
.knowledge-card-keywords{display:flex;gap:4px;flex-wrap:wrap;margin-top:8px}
.kb-keyword{font-size:11px;padding:1px 8px;border-radius:8px;background:var(--bg);color:var(--text2)}
.knowledge-card-actions{margin-top:10px;display:flex;gap:6px;justify-content:flex-end}

/* ═══ SESSIONS ═══ */
.sessions-layout{display:block}
.session-list{display:block}

/* Customer table row */
.session-item{padding:14px 20px;cursor:pointer;border:1px solid var(--border);border-radius:var(--radius);margin-bottom:6px;display:flex;align-items:center;gap:14px;background:var(--white);transition:.15s}
.session-item:hover{background:#f0f4ff;border-color:var(--primary)}
.session-item:last-child{margin-bottom:0}
.session-icon{width:40px;height:40px;border-radius:50%;background:#e8edf5;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:18px}
.session-info{display:flex;align-items:center;gap:12px;flex:1}
.session-meta h4{font-size:14px;font-weight:600}
.session-meta p{font-size:12px;color:var(--text3);margin-top:2px}
.session-stats{text-align:center;margin-left:auto;flex-shrink:0}
.session-stat-value{font-size:20px;font-weight:700;color:var(--primary)}
.session-stat-label{font-size:10px;color:var(--text3)}
.session-arrow{color:var(--text3);margin-left:12px}

/* Chat detail - full width card */
.session-chat{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:var(--white);margin-top:8px}
.chat-header{padding:14px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px;background:#fafbfc}
.chat-header strong{flex:1;font-size:15px;font-weight:600}
.chat-messages{padding:24px 32px;min-height:300px;max-height:500px;overflow-y:auto;display:flex;flex-direction:column;gap:20px}

/* Chat bubbles */
.msg-item{display:flex;gap:10px;max-width:78%}
.msg-item.user{align-self:flex-end;flex-direction:row-reverse}
.msg-item.bot{align-self:flex-start}
.msg-avatar{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0}
.msg-item.user .msg-avatar{background:#dbeafe;color:#2563eb}
.msg-item.bot .msg-avatar{background:#e8edf5;color:#64748b}
.msg-bubble{padding:10px 16px;border-radius:16px;font-size:14px;line-height:1.65;word-break:break-word;position:relative}
.msg-item.user .msg-bubble{background:var(--primary);color:#fff;border-bottom-right-radius:6px}
.msg-item.bot .msg-bubble{background:#f1f5f9;color:var(--text);border-bottom-left-radius:6px}
.msg-time{font-size:11px;color:var(--text3);margin-top:6px;padding:0 4px}

/* ═══ IMPORT ═══ */
.import-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:32px;text-align:center;color:var(--text3)}
.upload-zone:hover,.upload-zone.dragover{border-color:var(--primary);background:#eff6ff}
.import-preview{margin-top:16px;padding:16px;background:var(--bg);border-radius:var(--radius)}

/* ═══ MODAL ═══ */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.4);display:none;align-items:center;justify-content:center;z-index:200}
.modal-overlay.active{display:flex}
.modal{background:var(--white);border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.2);width:90%;max-width:560px;max-height:85vh;overflow-y:auto}
.modal-sm{max-width:400px}
.modal-lg{max-width:720px}
.modal-header{padding:16px 24px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.modal-header h3{font-size:16px;font-weight:600}
.modal-close{background:none;border:none;font-size:20px;color:var(--text3);cursor:pointer}
.modal-close:hover{color:var(--text)}
.modal-body{padding:20px 24px}
.modal-footer{padding:12px 24px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px}

/* ═══ FORM ═══ */
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:13px;font-weight:600;margin-bottom:4px}
.form-group .required{color:var(--danger)}
.form-group .hint{font-weight:400;color:var(--text3);font-size:12px}
.form-input{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;color:var(--text);background:var(--white);outline:none;font-family:inherit}
.form-input:focus{border-color:var(--primary)}
textarea.form-input{resize:vertical;min-height:60px}
.form-error{font-size:12px;color:var(--danger)}

/* ═══ PAGINATION ═══ */
.pagination{display:flex;justify-content:center;gap:4px;margin-top:16px}
.pagination button{padding:6px 12px;border:1px solid var(--border);border-radius:6px;background:var(--white);font-size:13px;cursor:pointer}
.pagination button:hover:not(:disabled){border-color:var(--primary);color:var(--primary)}
.pagination button:disabled{opacity:.4;cursor:not-allowed}
.pagination button.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ═══ MISC ═══ */
.select-input{padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;background:var(--white);outline:none;cursor:pointer}
.view-toggle{display:flex;border:1px solid var(--border);border-radius:6px;overflow:hidden}
.view-btn{padding:6px 12px;border:none;background:var(--white);color:var(--text2);cursor:pointer;font-size:13px}
.view-btn.active{background:var(--primary);color:#fff}

.bulk-actions{display:flex;align-items:center;gap:8px}
.bulk-count{font-size:13px;color:var(--text2);padding:2px 8px;background:#eff6ff;border-radius:8px}

.state-badge{font-size:11px;padding:1px 8px;border-radius:8px;font-weight:500}
[class*=意向强烈]{background:#fef2f2;color:#dc2626}
[class*=意向较好]{background:#fff7ed;color:#ea580c}
[class*=意向一般]{background:#eff6ff;color:#2563eb}
[class*=暂无意向]{background:#f8fafc;color:#64748b}

.preview-header{display:flex;justify-content:space-between;margin-bottom:8px}
.preview-count{font-size:13px;color:var(--text2)}
.preview-items{max-height:300px;overflow-y:auto;margin-bottom:8px}
.preview-validation{color:var(--warning);font-size:13px;margin-bottom:8px}
.preview-actions{display:flex;gap:8px;justify-content:flex-end}

.detail-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px}
.detail-list{max-height:350px;overflow-y:auto}
.detail-item{display:flex;align-items:center;gap:12px;padding:8px 12px;border-radius:6px;background:var(--bg);font-size:13px;margin-bottom:4px}

.status-badge{font-size:11px;padding:1px 8px;border-radius:8px;font-weight:600}
.status-badge.success{background:#f0fdf4;color:#16a34a}
.status-badge.warning{background:#fffbeb;color:#d97706}
.status-badge.error{background:#fef2f2;color:#dc2626}

.action-btn{padding:4px 8px;border:1px solid var(--border);border-radius:4px;background:var(--white);color:var(--text2);cursor:pointer;font-size:12px}.action-btn:hover{background:var(--bg);color:var(--primary)}.action-btn.danger{color:var(--danger)}.action-btn.danger:hover{background:#fef2f2}
.cb-cell{width:30px}
.category-tag{display:inline-block;padding:4px 12px;margin:3px;border-radius:16px;background:#eff6ff;color:var(--primary);font-size:13px;font-weight:500}
.activity-row{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--border)}
.activity-row:last-child{border-bottom:none}
.activity-icon{font-size:16px;flex-shrink:0}
.activity-user{flex:1;font-size:13px;font-weight:500}
.activity-msgs{font-size:12px;color:var(--text2);flex-shrink:0}
.activity-time{font-size:11px;color:var(--text3);flex-shrink:0;width:140px;text-align:right}
.empty-state{padding:40px;text-align:center;color:var(--text3)}
.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 12px}

.toast-container{position:fixed;top:20px;right:20px;z-index:300;display:flex;flex-direction:column;gap:8px}

@keyframes spin{to{transform:rotate(360deg)}}

@media(max-width:768px){
    .stats-row{grid-template-columns:1fr 1fr}
    .charts-row{grid-template-columns:1fr}
    .sessions-layout{flex-direction:column}
    .session-list{width:100%}
    .import-grid{grid-template-columns:1fr}
    .main-content{margin-left:0}
    .tab-content.active{padding:16px}
}