/* 官网落地页全局语言切换（首页 / 下载页共用） */
.lang-picker {
  z-index: 100;
}

.lang-picker--fixed {
  position: fixed;
  top: 14px;
  right: 14px;
}

.phone-shell > .lang-picker {
  position: absolute;
  top: calc(10px + env(safe-area-inset-top, 0px));
  right: 14px;
}

.lang-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.82);
  color: #6e6e73;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 40, 120, 0.08);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.lang-trigger:hover {
  color: #007aff;
  background: rgba(255, 255, 255, 0.95);
}

.lang-trigger[aria-expanded="true"] {
  color: #007aff;
  border-color: rgba(0, 122, 255, 0.35);
  box-shadow: 0 4px 14px rgba(0, 122, 255, 0.12);
}

.lang-trigger svg {
  width: 22px;
  height: 22px;
  pointer-events: none;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 9.5rem;
  margin: 0;
  padding: 6px;
  list-style: none;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 32px rgba(0, 40, 120, 0.14);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px) scale(0.98);
  transform-origin: top right;
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s ease;
}

.lang-picker.is-open .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.lang-option {
  display: block;
  width: 100%;
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  background: transparent;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: #1c1c1e;
  text-align: left;
  cursor: pointer;
  transition: background 0.12s ease, color 0.12s ease;
}

.lang-option:hover,
.lang-option:focus-visible {
  background: rgba(0, 122, 255, 0.08);
  color: #007aff;
  outline: none;
}

.lang-option.is-active {
  font-weight: 600;
  color: #007aff;
  background: rgba(0, 122, 255, 0.1);
}

/* 首页深色背景 */
.lang-picker--dark .lang-trigger {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(15, 23, 42, 0.55);
  color: #f8fafc;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
}

.lang-picker--dark .lang-trigger:hover,
.lang-picker--dark .lang-trigger[aria-expanded="true"] {
  color: #5eead4;
  border-color: rgba(94, 234, 212, 0.45);
  background: rgba(15, 23, 42, 0.75);
}

.lang-picker--dark .lang-menu {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(30, 41, 59, 0.96);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}

.lang-picker--dark .lang-option {
  color: #f8fafc;
}

.lang-picker--dark .lang-option:hover,
.lang-picker--dark .lang-option:focus-visible {
  background: rgba(94, 234, 212, 0.12);
  color: #5eead4;
}

.lang-picker--dark .lang-option.is-active {
  color: #5eead4;
  background: rgba(94, 234, 212, 0.16);
}