/* ============ 备案号（下挂页脚） ============ */
.beian-link, .foot-beian .beian-link {
  color: inherit;
  text-decoration: none;
  opacity: .78;
  transition: opacity .18s ease;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}
.beian-link:hover { opacity: 1; text-decoration: underline; }

/* 公安备案图标：官方图为 62x67（略高），按高度锁定，宽度自适应 */
.beian-icon {
  height: 14px;
  width: auto;
  max-width: 14px;
  object-fit: contain;
  vertical-align: middle;
  margin-right: 5px;
  border: 0;
  flex: none;
}
.beian-sep {
  margin: 0 8px;
  opacity: .35;
}
.beian-num { font-variant-numeric: tabular-nums; }

/* terminal 皮肤：跟在 footer 右侧 */
.footer .f-beian {
  font-size: 10.5px;
  letter-spacing: .04em;
  opacity: .68;
  margin-left: 14px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}
/* glass 皮肤：单独一行居中 */
.foot-beian {
  margin-top: 7px;
  font-size: 10.5px;
  letter-spacing: .03em;
  opacity: .75;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  flex-wrap: wrap;
}

/* 窄屏（手机）：整行下移换行，避免撑破页脚 */
@media (max-width: 640px) {
  .footer { flex-wrap: wrap; }
  .footer .f-beian {
    margin-left: 0;
    margin-top: 6px;
    flex-basis: 100%;
    order: 9;
    justify-content: center;
  }
  .f-spacer { display: none; }
  .beian-sep { margin: 0 5px; }
  .beian-icon { height: 13px; max-width: 13px; }
}