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120px);position:fixed;bottom:96px;right:24px;overflow:hidden;box-shadow:0 8px 32px #00000026}.chat-back-btn{cursor:pointer;color:#6b7280;background:0 0;border:none;border-radius:4px;justify-content:center;align-items:center;margin-right:4px;padding:4px;display:flex}.chat-back-btn:hover{color:#374151;background:#e5e7eb}.chat-sessions-container{flex-direction:column;flex:1;display:flex;overflow:hidden}.chat-new-btn{color:#fff;cursor:pointer;background:#4a90e2;border:none;border-radius:8px;justify-content:center;align-items:center;gap:8px;margin:12px 16px;padding:12px 16px;font-size:14px;font-weight:500;transition:background .15s;display:flex}.chat-new-btn:hover{background:#3a7bc8}.chat-sessions-loading,.chat-sessions-empty{color:#9ca3af;text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;padding:40px 20px;font-size:13px;display:flex}.chat-sessions-empty p{margin:4px 0}.chat-sessions-list{flex:1;padding:0 8px 8px;overflow-y:auto}.chat-session-item{cursor:pointer;text-align:left;background:#fff;border:1px solid #e5e7eb;border-radius:8px;align-items:center;width:100%;margin-bottom:8px;padding:12px;transition:all .15s;display:flex}.chat-session-item:hover{background:#f8fafc;border-color:#d1d5db}.chat-session-item.has-unread{background:#f0f7ff;border-color:#4a90e2}.chat-session-item-content{flex:1;min-width:0}.chat-session-item-header{justify-content:space-between;align-items:center;gap:8px;margin-bottom:4px;display:flex}.chat-session-item-title{color:#1a1a2e;white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:600;overflow:hidden}.chat-session-item-date{color:#9ca3af;flex-shrink:0;font-size:11px}.chat-session-item-preview{color:#6b7280;white-space:nowrap;text-overflow:ellipsis;font-size:12px;overflow:hidden}.chat-session-item.has-unread .chat-session-item-preview{color:#374151;font-weight:500}.chat-session-item-badge{color:#fff;background:#ef4444;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;min-width:20px;height:20px;margin-left:8px;font-size:11px;font-weight:600;display:flex}@media (max-width:480px){.chat-panel{border-radius:0;width:100%;height:100%;max-height:100vh;bottom:0;left:0;right:0}.chat-floating-btn{bottom:16px;right:16px}}