.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1003;
    margin-left: 15px;
    margin-right: 10px;
}

.hamburger span {
    width: 100%;
    height: 3px;
    background-color: #b0302a !important;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* 移动端菜单遮罩 */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1002;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 移动端侧边菜单 */
.mobile-sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    max-width: 300px;
    height: 100%;
    background-color: #fff;
    z-index: 1003;
    overflow-y: auto;
    transition: left 0.3s ease;
    padding: 80px 20px 30px;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
}

.mobile-sidebar.active {
    left: 0;
}

/* 移动端菜单项样式 */
.mobile-menu {
    list-style: none;
}

.mobile-menu-item {
    margin-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.mobile-menu-item:last-child {
    border-bottom: none;
}

.mobile-menu-item > a {
    display: block;
    padding: 15px 10px;
    color: #333;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.mobile-menu-item > a:hover {
    color: #2615a3;
    background-color: #f5f5f5;
    border-radius: 4px;
}

/* 二级菜单容器 */
.submenu-container {
    display: none;
    padding-left: 20px;
    background-color: #f9f9f9;
    border-radius: 4px;
    margin: 10px 0;
}

.submenu-container.active {
    display: block;
}

/* 二级菜单项 */
.submenu-item {
    margin-bottom: 8px;
}

.submenu-item > a {
    display: block;
    padding: 12px 10px;
    color: #666;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.submenu-item > a:hover {
    color: #2615a3;
    background-color: #f0f0f0;
    border-radius: 4px;
}

/* 三级菜单容器 */
.subsubmenu-container {
    display: none;
    padding-left: 20px;
    background-color: #f0f0f0;
    border-radius: 4px;
    margin: 8px 0;
}

.subsubmenu-container.active {
    display: block;
}

/* 三级菜单项 */
.subsubmenu-item {
    margin-bottom: 6px;
}

.subsubmenu-item > a {
    display: block;
    padding: 10px 10px;
    color: #888;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.subsubmenu-item > a:hover {
    color: #2615a3;
    background-color: #e9e9e9;
    border-radius: 4px;
}

/* 菜单箭头指示器 */
.menu-toggle {
    position: relative;
    padding-right: 30px !important;
}

.menu-toggle::after {
    content: ">";
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%) rotate(90deg);
    transition: transform 0.3s ease;
    font-size: 14px;
    color: #999;
}

.menu-toggle.active::after {
    transform: translateY(-50%) rotate(-90deg);
}

/* 响应式调整 - 移动端 */
@media (max-width: 810px) {
    /* 隐藏桌面端导航 */
    .nav-center {
        display: none;
    }
    
    /* 显示汉堡按钮 */
    .hamburger {
        display: flex;
    }
    
    /* 调整语言切换器在移动端的位置和样式 */
    .language-switcher-container {
        order: 1;
    }
    
    .nav-right {
        display: flex;
        align-items: center;
    }
    
    .language-switcher-btn {
        width: 60px;
        font-size: 13px;
        padding: 5px 8px;
        margin-right: 0;
    }
    
    /* 调整导航栏高度 */
    .navbar {
        height: 70px;
    }
    
    .logo {
        font-size: 18px;
        margin-left: 20px;
    }
    
    /* 调整关于我们标题图的间距 */
    .about-hero-section {
        margin-top: 70px;
        height: 400px;
    }
    
    .about-hero-content h1 {
        font-size: 2.2rem;
    }
    
    .about-hero-content p {
        font-size: 1rem;
        padding: 0 20px;
    }
    
    /* 调整核心价值卡片在移动端的高度 */
    .value-card {
        height: auto;
        min-height: 120px;
        padding: 25px 20px;
    }
    
    .value-card:hover {
        height: auto;
        min-height: 200px;
    }
    
    .value-desc {
        position: relative;
        bottom: auto;
        left: auto;
        right: auto;
        margin-top: 15px;
        opacity: 1;
        transform: none;
    }
    
    .value-card:hover .value-desc {
        transform: none;
        margin-top: 15px;
    }
    
    .value-card:hover .value-title {
        transform: none;
        margin-bottom: 10px;
    }
}