.lm61c-btn{position:fixed;right:22px;bottom:22px;width:58px;height:58px;border-radius:50%;border:0;cursor:pointer;
background:#1f6feb;color:#fff;font-size:26px;line-height:58px;text-align:center;box-shadow:0 6px 20px rgba(31,111,235,.4);z-index:999998;transition:transform .15s}
.lm61c-btn:hover{transform:scale(1.06)}
.lm61c-btn.lm61c-hide{display:none}
.lm61c-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);z-index:999999;display:none;flex-direction:column;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
.lm61c-panel.lm61c-open{display:flex}
.lm61c-head{position:relative;background:#1f6feb;color:#fff;padding:14px 16px 16px;flex:0 0 auto}
.lm61c-dot{position:absolute;left:16px;top:22px;width:8px;height:8px;border-radius:50%;background:#38d39f;box-shadow:0 0 0 2px rgba(255,255,255,.35)}
.lm61c-h-t{font-size:15px;font-weight:600;padding-left:16px}
.lm61c-h-s{font-size:12px;opacity:.85;margin-top:4px}
.lm61c-close{position:absolute;right:10px;top:8px;background:transparent;border:0;color:#fff;font-size:22px;cursor:pointer;line-height:1}
.lm61c-body{flex:1 1 auto;overflow-y:auto;padding:14px;background:#f7f8fa;display:flex;flex-direction:column;gap:8px}
.lm61c-msg{max-width:80%;padding:8px 11px;border-radius:12px;font-size:14px;line-height:1.45;white-space:pre-wrap;word-break:break-word}
.lm61c-agent{background:#fff;color:#222;align-self:flex-start;box-shadow:0 1px 3px rgba(0,0,0,.08);border-top-left-radius:4px}
.lm61c-visitor{background:#1f6feb;color:#fff;align-self:flex-end;border-top-right-radius:4px}
.lm61c-foot{flex:0 0 auto;display:flex;gap:8px;padding:10px;border-top:1px solid #eceef1;background:#fff}
.lm61c-input{flex:1 1 auto;resize:none;border:1px solid #dfe3e8;border-radius:9px;padding:8px 10px;font-size:14px;max-height:90px;outline:none}
.lm61c-input:focus{border-color:#1f6feb}
.lm61c-send{flex:0 0 auto;background:#1f6feb;color:#fff;border:0;border-radius:9px;padding:0 16px;font-size:14px;cursor:pointer}
@media(max-width:600px){
  .lm61c-btn{right:14px;bottom:14px;width:52px;height:52px;font-size:24px;line-height:52px}
  .lm61c-panel{left:12px;right:12px;top:auto;bottom:12px;width:auto;max-width:none;
    height:min(66vh,540px);max-height:min(66vh,540px);border-radius:14px}
  .lm61c-body{padding:12px}
}