/* 移动端导航修复 - 最终简化版 - 基于测试页面的成功方案 */

/* 移动端（手机） - ≤768px */
@media screen and (max-width: 767px) {
    /* 手机端 - 导航栏容器 */
    .navbar {
        width: 100% !important;
        overflow-x: visible !important;
    }
    
    .nav-container {
        max-width: 100% !important;
        padding: 0 16px !important;
        gap: 12px !important;
    }
    
    /* Logo缩小 */
    .nav-logo img {
        height: 32px !important;
    }
    
    /* 汉堡菜单按钮 */
    .mobile-menu-btn {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        font-size: 28px !important;
        background: none !important;
        border: none !important;
        cursor: pointer !important;
        color: #1a1a2e !important;
        width: 44px !important;
        height: 44px !important;
        flex-shrink: 0 !important;
    }
    
    .mobile-menu-btn.active {
        color: #E60012 !important;
    }
    
    /* 隐藏桌面按钮 */
    .btn-primary,
    .btn-secondary,
    .btn-buy {
        display: none !important;
    }
    
    /* 主导航菜单 - 默认隐藏 */
    .nav-links {
        position: fixed !important;
        top: 70px !important;
        left: 0 !important;
        right: 0 !important;
        background: white !important;
        flex-direction: column !important;
        padding: 20px !important;
        box-shadow: 0 4px 12px rgba(0,0,0,0.15) !important;
        max-height: calc(100vh - 70px) !important;
        overflow-y: auto !important;
        z-index: 9999 !important;
        
        /* 默认隐藏 */
        display: none !important;
    }
    
    /* 主导航菜单 - 展开状态 */
    .nav-links.active {
        display: flex !important;
    }
    
    /* 菜单项 */
    .nav-links > li {
        width: 100% !important;
        border-bottom: 1px solid #f0f0f0 !important;
        padding: 0 !important;
        margin: 0 !important;
        list-style: none !important;
    }
    
    .nav-links > li:last-child {
        border-bottom: none !important;
    }
    
    /* 一级菜单链接 */
    .nav-links > li > a {
        display: block !important;
        padding: 16px 12px !important;
        font-size: 16px !important;
        color: #1a1a2e !important;
        text-decoration: none !important;
        font-weight: 500 !important;
    }
    
    .nav-links > li > a:hover {
        background: #f8f8f8 !important;
        color: #E60012 !important;
    }
    
    /* 子菜单 - 简化版（基于测试页面的成功方案）*/
    .dropdown {
        background: #f8f8f8 !important;
        padding: 0 !important;
        
        /* 默认隐藏 */
        max-height: 0 !important;
        overflow: hidden !important;
        transition: max-height 0.3s ease !important;
    }
    
    /* 子菜单展开 - 使用简单选择器（已验证能工作）*/
    .has-dropdown.active .dropdown {
        max-height: 500px !important;
        padding: 8px 0 8px 20px !important;
    }
    
    /* 子菜单链接 */
    .dropdown a {
        display: block !important;
        padding: 12px 16px !important;
        font-size: 14px !important;
        color: #666 !important;
        text-decoration: none !important;
        border-left: 2px solid #E60012 !important;
        margin-bottom: 4px !important;
    }
    
    .dropdown a:hover {
        background: white !important;
        color: #E60012 !important;
    }
}

/* iPad竖屏 768px-1023px: 横向导航但隐藏联系我们按钮 */
@media screen and (min-width: 768px) and (max-width: 1100px) {
    .mobile-menu-btn {
        display: none !important;
    }
    
    .navbar .btn-buy {
        display: none !important;
        visibility: hidden !important;
    }
    
    .nav-links {
        display: flex !important;
        position: static !important;
        flex-direction: row !important;
        padding: 0 !important;
        box-shadow: none !important;
        background: transparent !important;
        max-height: none !important;
        overflow: visible !important;
    }
}

/* 平板横屏/桌面 - 820px及以上: 横向导航+联系我们按钮 */
@media screen and (min-width: 820px) {
    .mobile-menu-btn {
        display: none !important;
    }
    
    .btn-buy {
        display: inline-block !important;
        padding: 8px 18px !important;
        font-size: 13px !important;
        background: #E60012 !important;
        color: white !important;
        border-radius: 8px !important;
        font-weight: 600 !important;
        text-decoration: none !important;
    }
    
    .nav-links {
        display: flex !important;
        position: static !important;
        flex-direction: row !important;
        padding: 0 !important;
        box-shadow: none !important;
        background: transparent !important;
        max-height: none !important;
        overflow: visible !important;
    }
}

/* 桌面 - >1024px */
@media screen and (min-width: 1025px) {
    .mobile-menu-btn {
        display: none !important;
    }
}