*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;font-size:14px;color:#1f2937;background:#f3f4f6;-webkit-font-smoothing:antialiased}
a{color:#4F46E5;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit}
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-thumb{background:#d1d5db;border-radius:3px}
.app{display:flex;height:100vh;overflow:hidden}
.sidebar{width:64px;background:#1f2937;color:#fff;display:flex;flex-direction:column;align-items:center;padding:12px 0;flex-shrink:0}
.sidebar .logo{font-size:26px;margin-bottom:20px}
.sidebar .nav-item{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#9ca3af;font-size:20px;cursor:pointer;margin-bottom:6px;transition:.15s;position:relative;text-decoration:none}
.sidebar .nav-item:hover{background:#374151;color:#fff}
.sidebar .nav-item.active{background:#4F46E5;color:#fff}
.sidebar .spacer{flex:1}
.sidebar .avatar{width:36px;height:36px;border-radius:50%;background:#4F46E5;color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;cursor:pointer;margin-bottom:4px}
.sidebar .status-dot{width:10px;height:10px;border-radius:50%;background:#9ca3af;border:2px solid #1f2937}
.sidebar .status-dot.online{background:#22c55e}
.main{flex:1;display:flex;overflow:hidden}
.conv-list{width:320px;background:#fff;border-right:1px solid #e5e7eb;display:flex;flex-direction:column;flex-shrink:0}
.conv-list .header{padding:14px 16px;border-bottom:1px solid #e5e7eb}
.conv-list .header h2{font-size:15px;margin-bottom:10px}
.conv-list .search{display:flex;gap:8px;align-items:center;background:#f3f4f6;border-radius:8px;padding:6px 10px}
.conv-list .search input{flex:1;border:none;background:none;outline:none;font-size:13px}
.conv-list .tabs{display:flex;gap:4px;padding:0 16px 10px;border-bottom:1px solid #e5e7eb}
.conv-list .tab{padding:5px 12px;border-radius:6px;font-size:12px;cursor:pointer;color:#6b7280;background:#f3f4f6}
.conv-list .tab.active{background:#4F46E5;color:#fff}
.conv-list .items{flex:1;overflow-y:auto}
.conv-item{padding:12px 16px;border-bottom:1px solid #f3f4f6;cursor:pointer;position:relative;transition:background .12s}
.conv-item:hover{background:#f9fafb}
.conv-item.active{background:#eef2ff}
.conv-item.active::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:#4F46E5}
.conv-item .row1{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}
.conv-item .name{font-weight:600;font-size:13px;display:flex;align-items:center;gap:6px}
.conv-item .name .online-dot{width:7px;height:7px;border-radius:50%;background:#d1d5db}
.conv-item .name .online-dot.online{background:#22c55e}
.conv-item .time{font-size:11px;color:#9ca3af}
.conv-item .row2{display:flex;justify-content:space-between;align-items:center}
.conv-item .preview{font-size:12px;color:#6b7280;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:220px}
.conv-item .unread{background:#ef4444;color:#fff;font-size:11px;min-width:18px;height:18px;line-height:18px;border-radius:9px;text-align:center;padding:0 6px;font-weight:600}
.conv-item .region{font-size:11px;color:#9ca3af;margin-top:2px}
.empty{text-align:center;color:#9ca3af;padding:60px 20px;font-size:13px}
.chat-area{flex:1;display:flex;flex-direction:column;background:#fff;min-width:0}
.chat-header{padding:12px 20px;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;justify-content:space-between;background:#fff;flex-shrink:0}
.chat-header .visitor-info{display:flex;align-items:center;gap:12px}
.chat-header .visitor-info .name{font-weight:600;font-size:15px}
.chat-header .visitor-info .meta{font-size:12px;color:#6b7280}
.chat-header .actions{display:flex;gap:8px}
.chat-header .actions button{padding:6px 14px;background:#f3f4f6;border:none;border-radius:6px;font-size:13px;color:#374151}
.chat-header .actions button:hover{background:#e5e7eb}
.chat-header .actions button.primary{background:#4F46E5;color:#fff}
.chat-msgs{flex:1;overflow-y:auto;padding:20px;background:#f9fafb;display:flex;flex-direction:column;gap:12px}
.chat-msgs .load-more{align-self:center;padding:4px 14px;font-size:12px;color:#6b7280;cursor:pointer;border-radius:12px;background:#fff;border:1px solid #e5e7eb}
.msg-row{display:flex;gap:10px;max-width:78%}
.msg-row.visitor{align-self:flex-start}
.msg-row.agent{align-self:flex-end;flex-direction:row-reverse}
.msg-row.system{align-self:center;max-width:90%}
.msg-row .avatar{width:34px;height:34px;border-radius:50%;flex-shrink:0;background:#e5e7eb;color:#6b7280;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:600}
.msg-row.agent .avatar{background:#4F46E5;color:#fff}
.msg-row.system .avatar{display:none}
.msg-body{display:flex;flex-direction:column}
.msg-row.agent .msg-body{align-items:flex-end}
.msg-row .sender{font-size:11px;color:#9ca3af;margin-bottom:3px;padding:0 4px}
.msg-bubble{padding:9px 13px;border-radius:12px;word-break:break-word;line-height:1.5;white-space:pre-wrap;font-size:14px}
.msg-row.visitor .msg-bubble{background:#fff;color:#1f2937;border:1px solid #e5e7eb;border-top-left-radius:4px}
.msg-row.agent .msg-bubble{background:#4F46E5;color:#fff;border-top-right-radius:4px}
.msg-row.system .msg-bubble{background:#e5e7eb;color:#6b7280;font-size:12px;padding:4px 12px;border-radius:10px}
.msg-bubble img{max-width:240px;max-height:240px;border-radius:8px;cursor:pointer;display:block}
.msg-time{font-size:11px;color:#9ca3af;margin-top:3px;padding:0 4px}
.msg-revoke{font-size:11px;color:#9ca3af;margin-left:6px;cursor:pointer;display:none}
.msg-row:hover .msg-revoke{display:inline}
.msg-revoke:hover{color:#ef4444}
.typing-indicator{align-self:flex-start;padding:6px 12px;background:#fff;border:1px solid #e5e7eb;border-radius:12px;font-size:12px;color:#9ca3af;display:none}
.typing-indicator.show{display:inline-block}
.typing-indicator .dot{display:inline-block;width:4px;height:4px;border-radius:50%;background:#9ca3af;margin:0 1px;animation:bounce 1.2s infinite}
.typing-indicator .dot:nth-child(2){animation-delay:.2s}
.typing-indicator .dot:nth-child(3){animation-delay:.4s}
@keyframes bounce{0%,60%,100%{transform:translateY(0);opacity:.4}30%{transform:translateY(-4px);opacity:1}}
.chat-input-area{border-top:1px solid #e5e7eb;padding:12px 20px;background:#fff;flex-shrink:0}
.chat-input-area .toolbar{display:flex;gap:6px;align-items:center;margin-bottom:8px}
.chat-input-area .toolbar button{background:none;border:none;font-size:18px;width:32px;height:32px;border-radius:8px;color:#6b7280;display:flex;align-items:center;justify-content:center}
.chat-input-area .toolbar button:hover{background:#f3f4f6;color:#4F46E5}
.chat-input-area .toolbar .qr-btn{font-size:13px;padding:0 12px;width:auto;gap:4px}
.chat-input-area .input-row{display:flex;gap:10px;align-items:flex-end}
.chat-input-area textarea{flex:1;min-height:40px;max-height:120px;padding:10px 14px;border:1px solid #e5e7eb;border-radius:10px;resize:none;font-size:14px;outline:none;line-height:1.4}
.chat-input-area textarea:focus{border-color:#4F46E5}
.chat-input-area .send-btn{padding:0 22px;height:40px;background:#4F46E5;color:#fff;border:none;border-radius:10px;font-size:14px;font-weight:600}
.chat-input-area .send-btn:hover{background:#4338ca}
.qr-dropdown{position:absolute;bottom:100%;left:0;margin-bottom:8px;background:#fff;border:1px solid #e5e7eb;border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.12);width:420px;max-height:320px;overflow-y:auto;display:none;z-index:100}
.qr-dropdown.show{display:block}
.qr-dropdown .qr-cat{padding:6px 12px;font-size:11px;color:#9ca3af;background:#f9fafb;border-bottom:1px solid #f3f4f6;font-weight:600}
.qr-dropdown .qr-item{padding:10px 14px;cursor:pointer;border-bottom:1px solid #f9fafb}
.qr-dropdown .qr-item:hover{background:#eef2ff}
.qr-dropdown .qr-item .qr-title{font-size:13px;font-weight:600;margin-bottom:2px}
.qr-dropdown .qr-item .qr-content{font-size:12px;color:#6b7280;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.emoji-panel{position:absolute;bottom:100%;left:0;margin-bottom:8px;background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:8px;box-shadow:0 8px 24px rgba(0,0,0,.12);display:none;grid-template-columns:repeat(8,1fr);gap:2px;max-height:240px;overflow-y:auto;width:360px;z-index:100}
.emoji-panel.show{display:grid}
.emoji-panel span{font-size:22px;text-align:center;padding:4px;border-radius:6px;cursor:pointer;user-select:none}
.emoji-panel span:hover{background:#f3f4f6}
.visitor-panel{width:300px;background:#fff;border-left:1px solid #e5e7eb;display:flex;flex-direction:column;flex-shrink:0;overflow-y:auto}
.visitor-panel .vp-header{padding:14px 16px;border-bottom:1px solid #e5e7eb;display:flex;justify-content:space-between;align-items:center}
.visitor-panel .vp-header h3{font-size:14px}
.visitor-panel .vp-header .close{cursor:pointer;color:#9ca3af;font-size:18px}
.visitor-panel .vp-body{padding:16px}
.vp-section{margin-bottom:20px}
.vp-section .vp-title{font-size:11px;color:#9ca3af;font-weight:600;text-transform:uppercase;margin-bottom:8px}
.vp-row{display:flex;font-size:13px;padding:5px 0;line-height:1.5}
.vp-row .label{color:#9ca3af;width:60px;flex-shrink:0}
.vp-row .value{color:#1f2937;word-break:break-all}
.tag-list{display:flex;flex-wrap:wrap;gap:6px}
.tag{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;background:#eef2ff;color:#4F46E5;border-radius:12px;font-size:12px}
.tag .remove{cursor:pointer;opacity:.6;font-size:14px}
.tag-add{padding:3px 8px;border:1px dashed #d1d5db;color:#9ca3af;border-radius:12px;font-size:12px;cursor:pointer;background:none}
.track-list{font-size:12px}
.track-item{padding:8px 0;border-bottom:1px solid #f3f4f6}
.track-item:last-child{border-bottom:none}
.track-item .t-title{color:#1f2937;margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.track-item .t-meta{color:#9ca3af;font-size:11px}
.conv-history-item{padding:8px 10px;border-radius:8px;background:#f9fafb;margin-bottom:6px;font-size:12px;cursor:pointer}
.conv-history-item:hover{background:#eef2ff}
.conv-history-item .ch-time{color:#9ca3af;font-size:11px}
.conv-history-item .ch-preview{color:#374151;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.toast-wrap{position:fixed;top:20px;left:50%;transform:translateX(-50%);z-index:99999;display:flex;flex-direction:column;gap:8px;align-items:center}
.toast{padding:10px 20px;border-radius:8px;color:#fff;font-size:13px;box-shadow:0 6px 20px rgba(0,0,0,.2);opacity:0;animation:toastIn .25s forwards;max-width:400px}
.toast.success{background:#10b981}
.toast.error{background:#ef4444}
.toast.info{background:#3b82f6}
@keyframes toastIn{to{opacity:1}}
.modal-mask{position:fixed;inset:0;background:rgba(0,0,0,.5);display:none;align-items:center;justify-content:center;z-index:99998}
.modal-mask.show{display:flex}
.modal{background:#fff;border-radius:12px;padding:24px 28px;min-width:400px;max-width:90vw;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.modal h3{font-size:16px;margin-bottom:16px}
.modal label{display:block;font-size:13px;color:#374151;margin-bottom:6px;font-weight:600}
.modal input,.modal textarea,.modal select{width:100%;padding:9px 12px;border:1px solid #d1d5db;border-radius:8px;font-size:14px;outline:none;margin-bottom:14px;box-sizing:border-box}
.modal input:focus,.modal textarea:focus,.modal select:focus{border-color:#4F46E5}
.modal .actions{display:flex;justify-content:flex-end;gap:10px;margin-top:8px}
.modal .actions button{padding:9px 20px;border-radius:8px;border:none;font-size:14px}
.modal .actions .btn-cancel{background:#f3f4f6;color:#374151}
.modal .actions .btn-ok{background:#4F46E5;color:#fff;font-weight:600}
.modal .actions .btn-danger{background:#ef4444;color:#fff}
.img-lightbox{position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:9999999;display:none;align-items:center;justify-content:center;cursor:zoom-out}
.img-lightbox.show{display:flex}
.img-lightbox img{max-width:92vw;max-height:92vh;border-radius:4px}
@media(max-width:1200px){.visitor-panel{position:absolute;right:0;top:0;bottom:0;z-index:50;box-shadow:-4px 0 20px rgba(0,0,0,.1);transform:translateX(100%);transition:transform .25s}.visitor-panel.show{transform:translateX(0)}}
@media(max-width:900px){.conv-list{width:260px}}

/* ==================== 深色模式（body.dark） ==================== */
body.dark{color:#d1d5db;background:#111827}
body.dark ::-webkit-scrollbar-thumb{background:#4b5563}
body.dark a{color:#818cf8}
body.dark .conv-list,body.dark .chat-area,body.dark .chat-header,body.dark .visitor-panel,body.dark .chat-input-area,body.dark .conv-list .search,body.dark .conv-list .tab,body.dark .chat-header .actions button,body.dark .modal,body.dark .qr-dropdown,body.dark .emoji-panel,body.dark .chat-msgs .load-more,body.dark .page-wrap .card,body.dark .page-wrap .table-wrap,body.dark .page-wrap table,body.dark .kb-item{background:#1f2937;border-color:#374151;color:#d1d5db}
body.dark .page-wrap{background:#111827}
body.dark .conv-list .header,body.dark .conv-list .tabs,body.dark .conv-item,body.dark .vp-section,body.dark .visitor-panel .vp-header,body.dark .qr-dropdown .qr-item,body.dark .track-item{border-color:#374151}
body.dark .conv-list .search,body.dark .conv-list .tab,body.dark .chat-header .actions button,body.dark .qr-dropdown .qr-cat,body.dark .conv-history-item,body.dark .modal .actions .btn-cancel{background:#374151;color:#d1d5db}
body.dark .conv-list .tab.active{background:#4F46E5;color:#fff}
body.dark .conv-item:hover,body.dark .emoji-panel span:hover{background:#374151}
body.dark .conv-item.active{background:#312e81}
body.dark .conv-item .preview,body.dark .chat-header .visitor-info .meta,body.dark .qr-dropdown .qr-item .qr-content,body.dark .vp-row .label,body.dark .track-item .t-meta,body.dark .conv-history-item .ch-time{color:#9ca3af}
body.dark .chat-msgs{background:#111827}
body.dark .msg-row.visitor .msg-bubble{background:#1f2937;color:#e5e7eb;border-color:#374151}
body.dark .msg-row.system .msg-bubble{background:#374151;color:#9ca3af}
body.dark .typing-indicator{background:#1f2937;border-color:#374151}
body.dark .chat-input-area textarea,body.dark .modal input,body.dark .modal textarea,body.dark .modal select,body.dark .page-wrap input,body.dark .page-wrap textarea,body.dark .page-wrap select{background:#111827;border-color:#4b5563;color:#e5e7eb}
body.dark .conv-list .search input{color:#e5e7eb}
body.dark .conv-list .search,body.dark .chat-input-area .toolbar button:hover{background:#374151}
body.dark .vp-row .value,body.dark .track-item .t-title,body.dark .conv-history-item .ch-preview,body.dark .page-wrap h1,body.dark .page-wrap h2,body.dark .page-wrap h3,body.dark .modal h3{color:#e5e7eb}
body.dark .tag{background:#312e81;color:#a5b4fc}
body.dark .tag-add{border-color:#4b5563;color:#9ca3af}
body.dark .conv-history-item:hover,body.dark .qr-dropdown .qr-item:hover{background:#312e81}
body.dark .chat-msgs .load-more{background:#1f2937;border-color:#374151;color:#9ca3af}
body.dark .empty{color:#6b7280}
body.dark .page-wrap .stat-card,body.dark .page-wrap .chart-card{background:#1f2937;border-color:#374151}
body.dark .page-wrap table th,body.dark .page-wrap table td{border-color:#374151;color:#d1d5db}
body.dark .page-wrap table th{background:#111827}
body.dark .page-wrap table tr:hover td{background:#253042}
body.dark .qr-dropdown .qr-cat{background:#111827;border-color:#374151}
body.dark .modal label{color:#d1d5db}
.theme-toggle{position:fixed;right:18px;bottom:18px;z-index:9999;width:40px;height:40px;border-radius:50%;background:#1f2937;color:#fbbf24;border:1px solid #374151;font-size:18px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 14px rgba(0,0,0,.25)}
body.dark .theme-toggle{background:#374151}