*{box-sizing:border-box}.chat-page{width:100vw;height:100vh;display:flex;overflow:hidden}.chat-sidebar{background:var(--sidebar-bg);border-right:1px solid var(--border-color);flex-direction:column;flex-shrink:0;width:280px;transition:transform .3s;display:flex}.sidebar-header{border-bottom:1px solid var(--border-color);padding:16px}.sidebar-title{color:var(--text-primary);border-bottom:1px solid var(--border-color);align-items:center;gap:8px;margin-bottom:12px;padding-bottom:12px;font-size:16px;font-weight:600;display:flex}.sidebar-icon{width:24px;height:24px}.new-chat-btn{border:1px dashed var(--border-color);width:100%;color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:12px;justify-content:center;align-items:center;gap:8px;padding:12px 16px;font-size:14px;transition:all .2s;display:flex}.new-chat-btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--text-secondary)}.sidebar-content{flex:1;padding:8px;overflow-y:auto}.sidebar-tip{text-align:center;color:var(--text-secondary);padding:16px;font-size:13px}.conversation-list{flex-direction:column;gap:4px;display:flex}.conversation-item{cursor:pointer;border-radius:10px;align-items:center;gap:8px;padding:12px;transition:background .2s;display:flex}.conversation-item:hover{background:var(--bg-hover)}.conversation-item.active{background:var(--bg-secondary)}.conversation-info{flex:1;min-width:0}.conversation-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:14px;overflow:hidden}.conversation-date{color:var(--text-secondary);margin-top:2px;font-size:12px}.conversation-delete{opacity:0;color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:6px;transition:all .2s}.conversation-item:hover .conversation-delete{opacity:1}.conversation-delete:hover{color:#ef4444;background:#ef44441a}.menu-btn{color:var(--text-primary);cursor:pointer;background:0 0;border:none;border-radius:8px;padding:8px;display:none}.menu-btn:hover{background:var(--bg-hover)}.chat-main{background:var(--bg-primary);flex-direction:column;flex:1;min-width:0;display:flex}.chat-header{border-bottom:1px solid var(--border-color);background:var(--bg-secondary);align-items:center;gap:12px;padding:16px 24px;display:flex}.chat-header-avatar{object-fit:cover;border-radius:50%;width:36px;height:36px}.chat-header-info h1{color:var(--text-primary);margin:0;font-size:16px;font-weight:600}.chat-header-info p{color:var(--text-secondary);margin:2px 0 0;font-size:12px}.chat-messages{flex-direction:column;flex:1;padding:24px;display:flex;overflow-y:auto}.welcome-message{text-align:center;color:var(--text-secondary);padding:60px 20px}.welcome-message h2{color:var(--text-primary);margin-bottom:12px;font-size:24px}.welcome-message p{font-size:14px;line-height:1.6}.message{gap:12px;margin-bottom:24px;animation:.3s fadeIn;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.message.user{flex-direction:row-reverse}.message-avatar{background:var(--bg-secondary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;display:flex;overflow:hidden}.message-avatar img{object-fit:cover;width:100%;height:100%}.message-avatar.ai{background:var(--bg-secondary)}.message-content{min-width:60px;max-width:70%}.message-bubble{white-space:pre-wrap;word-break:break-word;border-radius:16px;padding:12px 16px;font-size:14px;line-height:1.6}.message.assistant .message-bubble{background:var(--bg-secondary);color:var(--text-primary);border-bottom-left-radius:4px}.message.user .message-bubble{color:#1e293b;background:linear-gradient(135deg,#94d2bd 0%,#7ec8b8 100%);border-bottom-right-radius:4px}.message-bubble.streaming{display:inline}.cursor-blink{color:#94d2bd;margin-left:2px;font-weight:700;animation:1s step-end infinite blink;display:inline-block}@keyframes blink{0%,to{opacity:1}50%{opacity:0}}.message-time{color:var(--text-secondary);margin-top:4px;padding:0 4px;font-size:11px}.chat-input-area{background:var(--bg-primary);border-top:1px solid var(--border-color);padding:16px 24px 24px}.chat-input-wrapper{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:16px;align-items:flex-end;gap:12px;padding:8px 12px;transition:border-color .2s,box-shadow .2s;display:flex}.chat-input-wrapper:focus-within{border-color:#94d2bd;box-shadow:0 0 0 3px #94d2bd33}.chat-input{resize:none;color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;min-height:24px;max-height:120px;padding:4px 0;font-size:14px;line-height:1.5}.chat-input::placeholder{color:var(--text-secondary)}.input-actions{align-items:center;gap:8px;display:flex}.input-btn{width:36px;height:36px;color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:10px;justify-content:center;align-items:center;transition:all .2s;display:flex}.input-btn:hover:not(:disabled){background:var(--bg-hover);color:var(--text-primary)}.input-btn:disabled{opacity:.4;cursor:not-allowed}.input-btn.send-btn{color:#fff;background:linear-gradient(135deg,#94d2bd 0%,#7ec8b8 100%)}.input-btn.send-btn:hover:not(:disabled){transform:scale(1.05)}.voice-btn.recording{color:#fff;background:#ef4444;animation:1.5s infinite pulse}@keyframes pulse{0%,to{box-shadow:0 0 #ef444466}50%{box-shadow:0 0 0 8px #ef444400}}.voice-error{color:#dc2626;background:#fef2f2;border-radius:8px;margin-top:8px;padding:8px 12px;font-size:12px}:root{--bg-primary:#fff;--bg-secondary:#f7f8fa;--sidebar-bg:#f7f8fa;--text-primary:#1e293b;--text-secondary:#64748b;--border-color:#e5e7eb;--bg-hover:#eef0f3}@media (prefers-color-scheme:dark){:root{--bg-primary:#0f0f10;--bg-secondary:#1a1a1b;--sidebar-bg:#1a1a1b;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--border-color:#2d2d30;--bg-hover:#252527}.message.user .message-bubble{color:#f1f5f9;background:linear-gradient(135deg,#4a9e8f 0%,#3d8b7d 100%)}.input-btn.send-btn{background:linear-gradient(135deg,#4a9e8f 0%,#3d8b7d 100%)}}@media (width<=768px){.chat-sidebar{z-index:100;position:fixed;top:0;bottom:0;left:0;transform:translate(-100%)}.chat-sidebar.open{transform:translate(0)}.menu-btn{display:flex}.message-content{max-width:85%}.chat-input-area{padding:12px 16px 20px}}