/* 中英切换按钮（2026-10-27）。方块双格，当前语言为草绿；桌面在「提问」右边，手机在汉堡菜单左边。 */
.gm-lang{
  display:inline-flex; flex:none; align-self:center; margin-left:10px; order:3;
  border:2px solid var(--gb-edge,#000); background:var(--gb-panel,#c6c6c6);
  box-shadow:inset -3px -3px 0 var(--gb-panel-lo,#555), inset 3px 3px 0 var(--gb-panel-hi,#fff);
  font-family:"Courier New",ui-monospace,monospace; line-height:1; position:relative; z-index:2;
}
.gm-lang__b{
  all:unset; cursor:pointer; padding:8px 10px 9px; font-weight:700; font-size:13px;
  color:#3a3d40; letter-spacing:.04em;
}
.gm-lang__b[aria-pressed="true"]{
  background:var(--gb-grass,#3b7322); color:#fff;
  box-shadow:inset -3px -3px 0 #24481a, inset 3px 3px 0 #5f9a45; text-shadow:1px 1px 0 #1d3a12;
}
.gm-lang__b:not([aria-pressed="true"]):hover{ background:#d8d8d8 }
.gm-lang__b:focus-visible{ outline:2px solid var(--gb-gold,#f2c84b); outline-offset:2px }
@media (min-width:769px){
  .nav .nav-inner{ justify-content:flex-start }
  .nav .nav-links{ order:2; margin-left:auto }
  body:not(.home) .gm-lang{ align-self:flex-end; margin-bottom:9px }
  body.home .gm-lang{ align-self:flex-end; margin-bottom:12px }
}
@media (max-width:768px){
  .gm-lang{ margin-left:auto; margin-right:8px; order:1 }
  .nav .nav-toggle{ order:2 }
  .gm-lang__b{ padding:7px 9px 8px; font-size:12px }
}
@media (prefers-reduced-motion:reduce){ .gm-lang__b{ transition:none } }