body{background:#f5f5f5;color:#333;line-height:1.4}.container{display:flex;max-width:1200px;margin:0 auto;padding:20px;height:100vh;gap:15px}.user-list{width:300px;background:#fff;border-radius:8px;overflow:hidden;border:1px solid #ddd}.user-list-header{padding:15px;background:#1e88e5;color:#fff;font-weight:bold;border-bottom:1px solid rgba(255,255,255,0.2);display:flex;justify-content:space-between;align-items:center;gap:20px}.user-item{display:flex;align-items:center;padding:12px 15px;border-bottom:1px solid #eee;cursor:pointer;transition:background 0.2s; position: relative}.user-item:hover{background:#f5f5f5}.user-item.active{background:#e3f2fd}.user-avatar{width:40px;height:40px;border-radius:50%;margin-right:2px;object-fit:cover;background:#1e88e5;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:bold; overflow: hidden}.user-avatar img {width:100%; height:100%; display: block}.user-name{flex:1;font-weight:500}.user-time{font-size:12px;color:#999}.chat-container{flex:1;display:flex;flex-direction:column;border:1px solid #ddd;background:#fff;border-radius:8px;overflow:hidden}.chat-header{background:#1e88e5;color:#fff;padding:12px 15px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid rgba(255,255,255,0.2)}.chat-title{flex:1;text-align:center;font-size:18px;font-weight:bold}.chat-messages{flex:1;overflow-y:auto;padding:10px;background:#f9f9f9}.message{margin-bottom:12px;display:flex;flex-direction:column;position:relative}.message-time{color:#999;font-size:12px;text-align:center;margin:8px 0}.message-content{max-width:80%;padding:10px 15px;border-radius:18px;line-height:1.4;word-break:break-word;position:relative}.message-received{align-items:flex-start}.message-received .message-content{background:#e5e5ea;color:#000;border-top-left-radius:4px}.message-sent{align-items:flex-end}.message-sent .message-content{background:#1e88e5;color:#fff;border-top-right-radius:4px}.message-sender{font-size:16px;font-weight:bold;color:#333;margin-bottom:5px;display:flex;align-items:center}.avatar{width:32px;height:32px;border-radius:50%;margin-right:8px;object-fit:cover}.chat-input-area{padding:10px;background:#fff;border-top:1px solid #ddd;display:flex;align-items:center}.chat-input{flex:1;padding:10px 15px;border:1px solid #ddd;border-radius:20px;outline:none;resize:none;min-height:44px;max-height:120px;line-height:1.4}.chat-send{margin-left:10px;padding:10px;background:#1e88e5;color:#fff;border:none;border-radius:50%;width:44px;height:44px;font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center}.chat-send:disabled{background:#ccc;cursor:not-allowed}.message-menu{position:absolute;right:10px;top:20px;background:#fff;border-radius:4px;box-shadow:0 2px 8px rgba(0,0,0,0.15);z-index:60;display:none;flex-direction:column;min-width:100px;overflow:hidden;border:1px solid #eee}.message-option{padding:6px 10px;cursor:pointer;font-size:13px;display:flex;align-items:center}.message-option:hover{background:#f5f5f5}.edit-input{width:100%;padding:6px 10px;border:1px solid #ddd;border-radius:4px;margin-top:5px}.message-edited{font-size:12px;color:#999;margin-top:5px;font-style:italic}.unread-count{background:#f44336;color:#fff;border-radius:50%;width:20px;height:20px;display:flex;align-items:center;justify-content:center;font-size:12px;margin-left:5px}.font-size-controls{display:none;align-items:center;gap:5px;margin-left:10px}.font-size-btn{background:rgba(255,255,255,0.2);border:none;color:white;width:24px;height:24px;border-radius:4px;cursor:pointer;display:flex;align-items:center;justify-content:center}.font-size-btn:hover{background:rgba(255,255,255,0.3)}.money-warning{position:fixed;top:20px;left:50%;transform:translateX(-50%);background-color:#ff9800;color:white;padding:10px 20px;border-radius:5px;box-shadow:0 2px 10px rgba(0,0,0,0.2);z-index:1000;display:none;align-items:center;justify-content:center;gap:10px}.money-warning-icon{font-size:20px}@media(max-width:768px){.container{flex-direction:column;padding:10px;height:auto}.user-list{width:100%;margin-bottom:15px}.user-item{padding:10px}.chat-input{padding:8px 12px}.message-content{max-width:90%}.money-warning{width:90%;text-align:center}}
.chat-image-send {
    position: relative;margin:5px;
    overflow: hidden;
    width:36px;
    height:34px;
    cursor: pointer;
}
input[type="file"].hide-image {
    position: absolute;
    left:0;
    top:0;
    width:36px;
    height:34px;
    opacity: 0;
    cursor: pointer;
}