.mail-head{gap:10px}
.mail-title{min-width:0;flex:1}
.mail-title b,.mail-title small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mail-refresh{flex:none;min-height:38px;padding:8px 12px;border:1px solid var(--line);border-radius:5px;background:#fff;color:var(--blue);font-weight:650;cursor:pointer}
.mail-refresh:hover{background:#edf5fa}
.mail-refresh:disabled{cursor:wait;opacity:.65}
.mail-refresh.loading::before{content:'↻';display:inline-block;margin-right:6px;animation:mail-spin .8s linear infinite}
@keyframes mail-spin{to{transform:rotate(360deg)}}
@media(max-width:700px){.mail-head{padding:10px 12px}.mail-refresh{min-width:62px}}