/* 将 X 头像作为站点统一品牌徽记。 */
.brand-logo {
  width: 38px;
  height: 38px;
  display: block;
  object-fit: cover;
  border-radius: 9px;
  border: 1px solid rgba(240, 185, 11, .68);
  box-shadow: 0 0 14px rgba(240, 185, 11, .22);
}

footer .brand-logo {
  width: 42px;
  height: 42px;
}

@media (max-width: 800px) {
  .brand-logo { width: 34px; height: 34px; }
}