#mention-box{
  display:flex;flex-direction:column;gap:2px;max-height:220px;overflow:auto;
  margin:0 12px 6px;padding:6px;border-radius:14px;
  background:var(--bg-2,#15202b);border:1px solid var(--line,#243140)
}
#mention-box.hidden{display:none}
.mention-row{
  display:flex;align-items:center;gap:8px;width:100%;text-align:left;
  border:0;background:transparent;color:inherit;border-radius:10px;padding:6px 8px;cursor:pointer
}
.mention-row.on,.mention-row:hover{background:rgba(59,180,212,.16)}
.mention-row b{display:block;font-weight:650}
.mention-row i{display:block;font-style:normal;color:var(--muted,#8b929a);font-size:12px}
.txt .at{color:#3bb4d4;font-weight:650}