/* 
 * 头部语言和货币选择器美化样式
 * 低调简洁版本
 */

/* 顶部导航栏整体优化 */
nav#top {
  background: #fff;
  border-bottom: 1px solid #eee;
  position: relative;
  z-index: 3000;
  overflow: visible;
}

nav#top .container {
  position: relative;
  z-index: 3001;
  overflow: visible;
}

/* 语言和货币选择器容器 */
nav#top .pull-left {
  margin-right: 15px;
}

/* 按钮组样式 */
nav#top .btn-group {
  position: relative;
}

/* 主按钮样式 - 低调版本 */
nav#top .btn-group > button.dropdown-toggle {
  color: #666;
  font-size: 13px;
  padding: 6px 10px;
  border: none;
  background: transparent;
  border-radius: 4px;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
  height: auto;
}

nav#top .btn-group > button.dropdown-toggle:hover {
  background: #f5f5f5;
  color: #333;
}

nav#top .btn-group > button.dropdown-toggle:focus {
  outline: none;
  background: #f0f0f0;
}

/* 语言/货币图标和符号 */
nav#top .btn-group > button.dropdown-toggle img {
  width: 18px;
  height: 18px;
  border-radius: 2px;
  vertical-align: middle;
  opacity: 0.9;
}

nav#top .btn-group > button.dropdown-toggle strong {
  font-size: 13px;
  font-weight: 500;
  color: #666;
}

/* 下拉箭头 */
nav#top .btn-group > button.dropdown-toggle .fa-caret-down,
nav#top .btn-group > button.dropdown-toggle .fa-angle-down {
  font-size: 11px;
  margin-left: 2px;
  opacity: 0.7;
  transition: transform 0.2s ease;
}

/* 展开时箭头旋转 */
nav#top .btn-group.open > button.dropdown-toggle .fa-caret-down,
nav#top .btn-group.open > button.dropdown-toggle .fa-angle-down {
  transform: rotate(180deg);
}

/* 下拉菜单样式 */
nav#top .btn-group .dropdown-menu {
  min-width: 160px;
  padding: 6px 0;
  margin-top: 2px;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  background: #fff;
  z-index: 999999999;
}

/* 语言选择器宽度 */
nav#top .btn-group .dropdown-menu.w600 {
  min-width: 180px;
  max-width: 280px;
}

/* 下拉菜单项 */
nav#top .btn-group .dropdown-menu li {
  list-style: none;
  margin: 0;
  padding: 0;
}

nav#top .btn-group .dropdown-menu li.fl200 {
  float: none;
  width: 100%;
}

/* 下拉菜单按钮 */
nav#top .btn-group .dropdown-menu button {
  width: 100%;
  text-align: left;
  padding: 7px 14px;
  color: #555;
  font-size: 13px;
  border: none;
  background: transparent;
  transition: background 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

nav#top .btn-group .dropdown-menu button:hover {
  background: #f8f8f8;
  color: #333;
}

nav#top .btn-group .dropdown-menu button:focus {
  outline: none;
}

/* 下拉菜单中的图标 */
nav#top .btn-group .dropdown-menu button img {
  width: 18px;
  height: 18px;
  border-radius: 2px;
  flex-shrink: 0;
  opacity: 0.9;
}

/* 货币符号 */
nav#top .btn-group .dropdown-menu button strong {
  font-weight: 500;
  margin-right: 4px;
}

/* 当前选中项高亮 */
nav#top .btn-group .dropdown-menu button.active,
nav#top .btn-group .dropdown-menu li.active button {
  background: #f0f0f0;
  color: #333;
  font-weight: 500;
}

/* 响应式调整 */
@media (max-width: 768px) {
  nav#top .btn-group > button.dropdown-toggle {
    padding: 5px 8px;
    font-size: 12px;
  }
  
  nav#top .btn-group > button.dropdown-toggle img {
    width: 16px;
    height: 16px;
  }
  
  nav#top .btn-group .dropdown-menu {
    min-width: 150px;
  }
  
  nav#top .btn-group .dropdown-menu button {
    padding: 6px 12px;
    font-size: 12px;
  }
}

/* 移动端隐藏文字，只显示图标 */
@media (max-width: 576px) {
  nav#top .btn-group > button.dropdown-toggle span {
    display: none !important;
  }
  
  nav#top .btn-group > button.dropdown-toggle {
    padding: 5px 6px;
  }
}

/* 优化顶部导航栏的其他链接 */
nav#top #top-links a {
  color: #555;
  font-size: 13px;
  transition: color 0.2s ease;
}

nav#top #top-links,
nav#top #top-links > ul,
nav#top #top-links > ul > li.dropdown {
  position: relative;
}

nav#top #top-links {
  z-index: 3010;
}

nav#top #top-links > ul > li.dropdown.open {
  z-index: 3020;
}

nav#top #top-links .dropdown-menu {
  z-index: 3030 !important;
  margin-top: 6px;
  border: 1px solid #e5e7eb;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
}

nav#top #top-links a:hover {
  color: #333;
  text-decoration: none;
}

/* 简化的动画效果 */
nav#top .btn-group .dropdown-menu {
  opacity: 0;
  transform: translateY(-5px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
}

nav#top .btn-group.open .dropdown-menu {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}