/* 客服悬浮气泡 + 聊天窗 */
#kefu-bubble{position:fixed;right:22px;bottom:22px;width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,#2f7cf6,#15b5a6);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 6px 20px rgba(47,124,246,.38);z-index:9998;transition:transform .18s ease;font-size:24px}
#kefu-bubble:hover{transform:scale(1.07)}
#kefu-bubble.hide{display:none}
#kefu-bubble .badge{position:absolute;top:-4px;right:-4px;min-width:18px;height:18px;line-height:18px;padding:0 5px;border-radius:9px;background:#ff4d4f;color:#fff;font-size:12px;display:none}
#kefu-panel{position:fixed;right:22px;bottom:22px;width:360px;max-width:calc(100vw - 24px);height:520px;max-height:calc(100vh - 40px);background:#fff;border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.18);display:none;flex-direction:column;overflow:hidden;z-index:9999;font-size:14px}
#kefu-panel.open{display:flex}
#kefu-panel .kefu-head{background:linear-gradient(135deg,#2f7cf6,#15b5a6);color:#fff;padding:12px 14px;display:flex;align-items:center;justify-content:space-between}
#kefu-panel .kefu-head .t{font-weight:600}
#kefu-panel .kefu-head .s{font-size:12px;opacity:.85;margin-top:2px}
#kefu-panel .kefu-head .close{cursor:pointer;font-size:18px;line-height:1;opacity:.9}
#kefu-body{flex:1;overflow-y:auto;padding:14px;background:#f6f8fb}
.kefu-msg{display:flex;margin-bottom:10px}
.kefu-msg .bubble{max-width:80%;padding:9px 12px;border-radius:12px;line-height:1.55;word-break:break-word;white-space:pre-wrap}
.kefu-msg.user{justify-content:flex-end}
.kefu-msg.user .bubble{background:#2f7cf6;color:#fff;border-bottom-right-radius:3px}
.kefu-msg.assistant .bubble,.kefu-msg.admin .bubble{background:#fff;color:#222;border-bottom-left-radius:3px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.kefu-msg.admin .bubble{border-left:3px solid #15b5a6}
.kefu-msg .typing{color:#98a2b3}
#kefu-foot{border-top:1px solid #eef1f5;padding:8px;display:flex;gap:8px;background:#fff}
#kefu-foot textarea{flex:1;border:1px solid #e3e8ef;border-radius:9px;resize:none;height:38px;line-height:20px;padding:8px 10px;font-size:14px;outline:none;font-family:inherit}
#kefu-foot textarea:focus{border-color:#2f7cf6}
#kefu-foot button{border:0;background:#2f7cf6;color:#fff;border-radius:9px;padding:0 16px;cursor:pointer;font-size:14px}
#kefu-foot button:disabled{opacity:.5;cursor:not-allowed}
.kefu-actions{display:flex;gap:8px;justify-content:center;margin-top:8px}
.kefu-actions a{font-size:12px;color:#2f7cf6;cursor:pointer;text-decoration:none;background:#eef4ff;border-radius:20px;padding:4px 12px}
@media (max-width:480px){#kefu-panel{right:0;bottom:0;width:100vw;height:100vh;max-height:100vh;border-radius:0}}