#kx-chat-bubble{position:fixed;bottom:20px;right:20px;width:60px;height:60px;border-radius:50%;background:#2f8fd6;color:#fff;font-size:26px;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 4px 14px rgba(0,0,0,.25);z-index:9998;border:none}
#kx-chat-bubble:hover{background:#2578b3}
#kx-chat-panel{position:fixed;bottom:92px;right:20px;width:320px;max-width:90vw;height:420px;max-height:70vh;background:#fff;border-radius:12px;box-shadow:0 8px 30px rgba(0,0,0,.3);display:none;flex-direction:column;overflow:hidden;z-index:9999;font-family:Arial,Helvetica,sans-serif}
#kx-chat-panel.kx-open{display:flex}
#kx-chat-header{background:#2f8fd6;color:#fff;padding:14px 16px;font-size:15px;font-weight:bold;display:flex;justify-content:space-between;align-items:center}
#kx-chat-close{cursor:pointer;font-size:18px;line-height:1;background:none;border:none;color:#fff}
#kx-chat-messages{flex:1;overflow-y:auto;padding:12px;font-size:14px;background:#f5f7fa}
.kx-msg{margin-bottom:10px;max-width:85%;padding:8px 12px;border-radius:14px;line-height:1.4;white-space:pre-wrap}
.kx-msg-bot{background:#e6eef7;color:#1a1a1a;border-bottom-left-radius:2px}
.kx-msg-user{background:#2f8fd6;color:#fff;margin-left:auto;border-bottom-right-radius:2px}
#kx-chat-form{display:flex;border-top:1px solid #e5e5e5}
#kx-chat-input{flex:1;border:none;padding:10px 12px;font-size:14px;outline:none}
#kx-chat-send{border:none;background:#2f8fd6;color:#fff;padding:0 16px;cursor:pointer;font-size:14px}
#kx-chat-send:disabled{opacity:.6;cursor:default}