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.more-btn{display:flex;align-items:center;padding:6px;font-size:18px;color:var(--wechat-text)}.chat-messages{flex:1;min-height:0;overflow-y:scroll;overflow-x:hidden;padding:10px 0;-webkit-overflow-scrolling:touch;overscroll-behavior-y:contain}.load-more-hint{text-align:center;padding:10px 0;font-size:12px;color:var(--wechat-text-secondary)}.message-time{text-align:center;padding:8px 0;font-size:12px;color:var(--wechat-text-secondary)}.message-item{display:flex;align-items:flex-end;padding:4px 12px;gap:8px}.message-item.self{flex-direction:row-reverse}.avatar{width:var(--avatar-size);height:var(--avatar-size);border-radius:var(--border-radius);overflow:hidden;flex-shrink:0;background:var(--wechat-green);display:flex;align-items:center;justify-content:center;font-size:18px;color:#fff}.avatar img{width:100%;height:100%;object-fit:cover}.bubble-wrapper{display:flex;align-items:flex-start;max-width:calc(100vw - 120px)}.message-item.self .bubble-wrapper{flex-direction:row-reverse}.bubble-arrow{width:0;height:0;flex-shrink:0;margin-top:10px}.message-item.other .bubble-arrow{border-top:6px solid transparent;border-bottom:6px solid transparent;border-right:8px solid var(--bubble-other-bg)}.message-item.self .bubble-arrow{border-top:6px solid transparent;border-bottom:6px solid transparent;border-left:8px solid var(--bubble-self-bg)}.message-bubble{padding:8px 10px;border-radius:var(--bubble-radius);word-break:break-word;line-height:1.5;font-size:15px;color:var(--wechat-text);position:relative}.message-bubble.other{background:var(--bubble-other-bg)}.message-bubble.self{background:var(--bubble-self-bg)}.message-status{font-size:11px;color:var(--wechat-text-secondary);align-self:flex-end;margin-bottom:4px;flex-shrink:0}.message-status.failed{color:var(--wechat-red)}.chat-input-area{flex-shrink:0;display:flex;align-items:flex-end;gap:8px;padding:6px 8px;background:var(--wechat-input-bg);border-top:1px solid var(--wechat-nav-border)}.voice-btn,.attach-btn,.send-btn,.emoji-btn{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:4px;color:var(--wechat-text);flex-shrink:0;font-size:22px}.send-btn{background:var(--wechat-green);color:#fff;font-size:14px;font-weight:600;width:auto;padding:0 14px;height:36px;border-radius:4px}.chat-textarea{flex:1;min-height:36px;max-height:100px;background:var(--wechat-white);border-radius:4px;padding:8px 10px;font-size:15px;line-height:1.4;color:var(--wechat-text);resize:none;overflow-y:auto}.voice-record-btn{flex:1;height:36px;background:var(--wechat-white);border-radius:4px;font-size:14px;color:var(--wechat-text);text-align:center;line-height:36px;-webkit-user-select:none;user-select:none}.voice-record-btn.recording{background:var(--wechat-border);color:var(--wechat-text-secondary)}.attach-popup{position:fixed;bottom:0;left:0;right:0;background:var(--wechat-input-bg);border-top:1px solid var(--wechat-nav-border);padding:40px 16px 16px;display:flex;gap:20px;z-index:20}.attach-item{display:flex;flex-direction:column;align-items:center;gap:6px;font-size:12px;color:var(--wechat-text-secondary)}.attach-item-icon{width:56px;height:56px;border-radius:10px;background:var(--wechat-white);display:flex;align-items:center;justify-content:center;font-size:26px}.chat-loading{position:absolute;top:0;right:0;bottom:0;left:0;background:#ffffffd9;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;z-index:50;font-size:14px;color:var(--wechat-text-secondary)}.chat-error{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--wechat-bg);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:24px;text-align:center}.chat-error p{color:var(--wechat-text-secondary);font-size:14px}.chat-error .retry-btn{padding:10px 28px;background:var(--wechat-green);border-radius:4px;font-size:15px;color:var(--wechat-text)}@keyframes spin{to{transform:rotate(360deg)}}.spinner{width:28px;height:28px;border:3px solid var(--wechat-border);border-top-color:var(--wechat-green-dark);border-radius:50%;animation:spin .8s linear infinite}