.hamburger-btn {
  display: none;
  background: var(--hamburger-bg);
  border: 1.5px solid var(--hamburger-border);
  border-radius: 10px;
  width: 44px;
  height: 40px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.3);
  transition: all 0.2s;
}

.hamburger-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: #00d4ff;
  border-radius: 1px;
  transition: all 0.2s;
  box-shadow: 0 0 6px rgba(0, 212, 255, 0.5);
}

.hamburger-btn.open .hamburger-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger-btn.open .hamburger-bar:nth-child(2) { opacity: 0; }
.hamburger-btn.open .hamburger-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-mobile-drawer {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  text-align: center;
  align-items: center;
  z-index: 110;
  background: var(--drawer-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--cosmic-card-border, rgba(0, 212, 255, 0.2));
  max-height: 80vh;
  overflow-y: auto;
  padding: 12px 16px 20px;
  flex-direction: column;
  gap: 2px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.nav-mobile-drawer.open { display: flex; align-items: center; }

.nav-mobile-drawer a {
  padding: 14px 12px;
  font-size: 16px;
  text-align: center;
  pointer-events: auto !important;
  cursor: pointer;
  color: var(--drawer-text);
  text-decoration: none;
  border-bottom: 1px solid var(--drawer-divider);
  border-radius: 8px;
  transition: background 0.15s;
  font-weight: 500;
}

.nav-mobile-drawer a:hover { background: rgba(0, 212, 255, 0.08); color: #00d4ff; }

.nav-mobile-drawer .mobile-lang {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 12px;
  border-bottom: 1px solid var(--drawer-divider);
  font-size: 14px;
  color: var(--drawer-lang-color);
}

.nav-mobile-drawer .mobile-actions {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px 0;
  width: 100%;
}

.nav-mobile-drawer .mobile-actions .btn-3d {
  display: flex;
  pointer-events: auto !important;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12px !important;
  font-size: 14px !important;
  margin-bottom: 14px;
}

.nav-mobile-drawer .mobile-actions .btn-3d:last-child { margin-bottom: 0; }

.nav-mask {
  display: none;
  position: fixed;
  background: var(--nav-mask-bg);
  inset: 0;
  z-index: 99;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.nav-mask.open { display: block; }

@media (max-width: 768px) {
  .nav-pill { display: none !important; }
  nav > div > div { gap: 0 !important; }
  nav > div > div:nth-child(3) { display: none !important; }
  .hamburger-btn { display: flex !important; }
}







[lang="en"] { display: none; }
body.lang-en [lang="zh"] { display: none; }
body.lang-en [lang="en"] { display: revert; }
/* 2026-07-17 P0: 5 个 static 页面统一地球按钮, 与 LangSwitcher.tsx 视觉对齐
   - click-to-toggle 单按钮, 显示目标语言
   - 当前 zh → 🌏 + "English" → 点击切 ?lang=en
   - 当前 en → 🌎 + "中文"    → 点击切默认 zh */
.lang-trigger {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 6px 12px; border-radius: 8px;
  background: transparent;
  border: 1px solid var(--hover-overlay-soft);
  color: var(--text-secondary);
  font-size: 12px; line-height: 1;
  font-family: inherit;
  text-decoration: none; cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.lang-trigger:hover { border-color: var(--accent-cyan, #00d4ff); color: var(--accent-cyan, #00d4ff); background: rgba(0, 212, 255, 0.06); }
.lang-trigger-icon { font-size: 14px; line-height: 1; }
/* mobile drawer 内嵌版: 全宽 + 行高加大 */
.nav-mobile-drawer .mobile-lang .lang-trigger {
  width: 100%; padding: 14px 20px;
  border: none; border-radius: 0;
  justify-content: center;
  font-size: 14px; color: var(--text-primary);
  background: transparent;
}
.nav-mobile-drawer .mobile-lang .lang-trigger:hover {
  background: rgba(0, 212, 255, 0.08); color: var(--accent-cyan, #00d4ff);
}



@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .nav-mobile-drawer { background: var(--drawer-bg); }
  .nav-mask { background: var(--nav-mask-bg); }
}