/* ═══════════════════════════════════════════════════════════════
   语言切换 Pill Segmented · 底部固定一排 · 紧凑干净
   ═══════════════════════════════════════════════════════════════ */

.lang-bar {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  background: rgba(22,22,30,0.82);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px;
  padding: 3px;
  gap: 1px;
  box-shadow:
    0 4px 24px rgba(0,0,0,0.4),
    0 0 0 1px rgba(0,0,0,0.25);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
               "Segoe UI", sans-serif;
}

.lang-bar__opt {
  flex: 0 0 auto;
  border: none;
  background: transparent;
  color: rgba(255,255,255,0.55);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.15s ease,
              background 0.15s ease,
              transform 0.12s ease;
  letter-spacing: 0.3px;
  min-width: 34px;
  text-align: center;
  line-height: 1;
}

.lang-bar__opt:hover {
  color: rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.04);
}

.lang-bar__opt:active { transform: scale(0.94); }

.lang-bar__opt.is-active {
  color: #fff;
  background: linear-gradient(135deg, rgba(80,140,255,0.45), rgba(100,120,255,0.4));
  box-shadow:
    0 1px 0 rgba(255,255,255,0.12) inset,
    0 0 0 1px rgba(120,160,255,0.55),
    0 2px 8px rgba(80,120,255,0.28);
}

/* ── 移动端 ── */
@media (max-width: 480px) {
  .lang-bar { bottom: 14px; }
  .lang-bar__opt { font-size: 12px; padding: 6px 10px; min-width: 28px; }
}

/* ── 暗色模式兼容 ── */
@media (prefers-color-scheme: dark) {
  .lang-bar { background: rgba(30,30,40,0.88); }
}