/* 导航栏内的语言切换按钮 - 放在文件开头 */
.lang-toggle-nav {
    display: flex !important;  /* 添加 !important 确保显示 */
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    margin-right: 12px;
    background: transparent;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-sans);
    white-space: nowrap;
    height: fit-content;  /* 确保高度正确 */
}

.lang-toggle-nav:hover {
    background: var(--gray-50);
    border-color: var(--primary);
    color: var(--primary);
}

.lang-toggle-nav .lang-icon {
    width: 16px;
    height: 16px;
    opacity: 0.7;
    transition: opacity 0.3s;
    flex-shrink: 0;  /* 防止图标变形 */
}

.lang-toggle-nav:hover .lang-icon {
    opacity: 1;
}

.lang-toggle-nav .lang-current {
    font-size: 0.875rem;
    letter-spacing: 0.02em;
}
/* 语言切换器 - 下拉菜单式 */
.language-dropdown {
    position: relative;
    margin-right: 20px;
}

/* 切换按钮 */
.language-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: transparent;
    border: none;  /* 去掉边框 */
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-sans);
    white-space: nowrap;
    border-radius: 8px;
}

.language-dropdown-toggle:hover {
    background: var(--gray-100);
    color: var(--primary);
}

/* 地球图标 */
.language-dropdown-toggle::before {
    content: '🌐';
    font-size: 1.2rem;
    line-height: 1;
}

/* 下拉箭头 */
.language-dropdown-toggle::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 4px;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    opacity: 0.6;
    transition: transform 0.3s ease;
}

/* 激活状态的箭头旋转 */
.language-dropdown.active .language-dropdown-toggle {
    background: var(--gray-100);
    color: var(--primary);
}

/* 下拉菜单 */
.language-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    min-width: 180px;
    overflow: hidden;
    z-index: 1000;
}

/* 显示菜单 */
.language-dropdown.active .language-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 语言选项 */
.language-option {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 20px;
    border: none;
    background: none;
    text-align: left;
    color: var(--gray-700);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-sans);
}

.language-option:hover {
    background: var(--gray-50);
    color: var(--primary);
}

/* 激活的语言 */
.language-option.active {
    background: var(--primary);
    color: white;
}

.language-option.active:hover {
    background: var(--primary-dark);
}

/* 国旗图标 */
.lang-flag {
    font-size: 1.2rem;
    line-height: 1;
}

/* 语言名称 */
.lang-name {
    flex: 1;
}

/* 导航栏滚动时的适配 */
.navbar.scrolled .language-dropdown-toggle {
    background: rgba(255, 255, 255, 0.8);
}


/* 移动端样式 */
@media (max-width: 768px) {
    .language-dropdown {
        margin-right: 12px;
    }
    
    .language-dropdown-toggle {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
    
    .language-dropdown-toggle::before {
        font-size: 1rem;
    }
    
    /* 移动端隐藏文字，只显示图标 */
    .language-dropdown-toggle .lang-current {
        display: none;
    }
    
    .language-dropdown-menu {
        right: auto;
        left: 50%;
        transform: translateX(-50%) translateY(-10px);
    }
    
    .language-dropdown.active .language-dropdown-menu {
        transform: translateX(-50%) translateY(0);
    }
}

/* 移动端菜单中的语言切换 */
.mobile-language-section {
    padding: 16px 0;
    border-top: 1px solid var(--gray-200);
}

.mobile-language-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mobile-language-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.mobile-language-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    background: white;
    color: var(--gray-700);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-sans);
}

.mobile-language-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.mobile-language-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* 暗色主题支持（如果需要） */
@media (prefers-color-scheme: dark) {
    .language-dropdown-menu {
        background: var(--dark-card);
        border-color: rgba(255, 255, 255, 0.1);
    }
    
    .language-option {
        color: rgba(255, 255, 255, 0.9);
    }
    
    .language-option:hover {
        background: rgba(255, 255, 255, 0.1);
        color: var(--primary-light);
    }
}

/* 打印时隐藏 */
@media print {
    .language-dropdown,
    .mobile-language-section {
        display: none !important;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    .language-dropdown-toggle {
        border-width: 2px;
    }
    
    .language-option.active {
        outline: 2px solid white;
        outline-offset: -2px;
    }
}

/* 极简角标语言切换器 - PC端专用 */
.lang-corner {
    position: fixed;
    top: 20px;
    right: 200px;  /* 从24px调整到200px，避免太靠右 */
    z-index: 1001;  /* 确保在导航栏(1000)之上，但在模态框(9999)之下 */
}

/* 大屏幕适配 */
@media (min-width: 1440px) {
    .lang-corner {
        right: 240px;  /* 大屏幕稍微调远一点 */
    }
}

/* 中等屏幕适配 */
@media (max-width: 1280px) {
    .lang-corner {
        right: 160px;  /* 中等屏幕稍微近一点 */
    }
}

/* 小屏幕笔记本适配 */
@media (max-width: 1024px) {
    .lang-corner {
        right: 120px;  /* 小屏幕更近一些 */
    }
}

.lang-toggle-corner {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    text-decoration: none;
    font-family: var(--font-sans);
    /* 添加初始动画 */
animation: langButtonEntrance 0.6s ease-out 0.5s backwards;
}
/* 入场动画 */
@keyframes langButtonEntrance {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.lang-toggle-corner:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    border-color: var(--primary);
    transform: translateY(-2px) scale(1.05);  /* 增加轻微放大效果 */
    background: rgba(255, 255, 255, 1);  /* hover时背景更实一些 */
}

.lang-icon {
    width: 16px;
    height: 16px;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.lang-toggle-corner:hover .lang-icon {
    opacity: 1;
}

.lang-current-text {
    color: var(--gray-700);
    letter-spacing: 0.02em;
}

/* 移动端完全隐藏角标，使用菜单内的切换 */
@media (max-width: 768px) {
    .lang-corner {
        display: none !important;
    }
}

/* 打印时隐藏 */
@media print {
    .lang-corner {
        display: none !important;
    }
}


/* 可选：首次加载时的脉冲提示效果 */
.lang-toggle-corner::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 20px;
    border: 2px solid var(--primary);
    opacity: 0;
    animation: langPulse 2s ease-out 1s 2;  /* 1秒后开始，脉冲2次 */
}

@keyframes langPulse {
    0% {
        transform: scale(1);
        opacity: 0.7;
    }
    100% {
        transform: scale(1.2);
        opacity: 0;
    }
}

/* 导航栏内的语言切换按钮 */
.lang-toggle-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    margin-right: 12px;
    background: transparent;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-sans);
    white-space: nowrap;
}

.lang-toggle-nav:hover {
    background: var(--gray-50);
    border-color: var(--primary);
    color: var(--primary);
}

.lang-toggle-nav .lang-icon {
    width: 16px;
    height: 16px;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.lang-toggle-nav:hover .lang-icon {
    opacity: 1;
}

.lang-toggle-nav .lang-current {
    font-size: 0.875rem;
    letter-spacing: 0.02em;
}

/* 滚动时的样式调整 */
.navbar.scrolled .lang-toggle-nav {
    border-color: var(--gray-200);
}

.navbar.scrolled .lang-toggle-nav:hover {
    background: rgba(99, 102, 241, 0.1);
}

/* 移动端隐藏（使用菜单内的切换） */
@media (max-width: 768px) {
    .lang-toggle-nav {
        display: none !important;
    }
}

/* 中等屏幕优化 */
@media (max-width: 1200px) {
    .lang-toggle-nav {
        padding: 5px 10px;
        font-size: 0.8rem;
        margin-right: 8px;
    }
    
    .lang-toggle-nav .lang-icon {
        width: 14px;
        height: 14px;
    }
}

/* 小屏幕只显示图标 */
@media (max-width: 1024px) {
    .lang-toggle-nav .lang-current {
        display: none;
    }
    
    .lang-toggle-nav {
        padding: 8px;
        margin-right: 8px;
    }
}

/* 隐藏原来的角标样式 */
.lang-corner {
    display: none !important;
}

/* 移动端语言切换器 */
.mobile-language-section {
    position: relative;
    border-bottom: 1px solid var(--gray-100);
}

/* 切换按钮 */
.mobile-language-toggle {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 12px 0;
    background: none;
    border: none;
    color: var(--gray-700);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: color var(--animation-fast);
}

.mobile-language-toggle:hover {
    color: var(--primary);
}

.mobile-language-toggle .lang-icon {
    font-size: 1.2rem;
    margin-right: 12px;
}

.mobile-language-toggle .lang-current {
    flex: 1;
    text-align: left;
}

.mobile-language-toggle .lang-arrow {
    font-size: 0.75rem;
    opacity: 0.5;
    transition: transform 0.3s;
}

.mobile-language-section.active .lang-arrow {
    transform: rotate(180deg);
}

/* 语言菜单 */
.mobile-language-menu {
    display: none;
    background: var(--gray-50);
    border-radius: 8px;
    margin: 8px 0;
    overflow: hidden;
}

.mobile-language-section.active .mobile-language-menu {
    display: block;
}

.mobile-language-menu .language-option {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 16px;
    border: none;
    background: none;
    text-align: left;
    color: var(--gray-700);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-sans);
}

.mobile-language-menu .language-option:hover {
    background: white;
    color: var(--primary);
}

.mobile-language-menu .lang-flag {
    font-size: 1.2rem;
}

/* 语言下拉菜单样式 */
.language-dropdown-menu {
    position: fixed;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    padding: 8px 0;
    z-index: 1002;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    min-width: 160px;
    max-height: 300px;
    overflow-y: auto;
}

.language-dropdown-menu-active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-dropdown-menu .language-option {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 16px;
    border: none;
    background: none;
    text-align: left;
    color: var(--gray-700);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-sans);
    position: relative;
}

.language-dropdown-menu .language-option:hover {
    background: var(--gray-50);
    color: var(--primary);
}

.language-dropdown-menu .language-option.active {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

.language-dropdown-menu .language-option.active:hover {
    background: rgba(99, 102, 241, 0.15);
}

.language-dropdown-menu .lang-flag {
    font-size: 1.2rem;
    line-height: 1;
}

.language-dropdown-menu .lang-name {
    flex: 1;
}

.language-dropdown-menu .current-indicator {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.8rem;
}