/**
 * 简洁移动端导航样式
 * 作者: VT SEO团队
 * 日期: 2025-01-04
 * 功能: 基于checkbox的纯CSS移动端导航
 */

/* 隐藏checkbox */
#nav-toggle {
    display: none;
}

/* 汉堡菜单标签样式 */
.nav-toggle-label {
    display: none;
    position: relative;
    width: 35px;
    height: 30px;
    cursor: pointer;
    z-index: 1002;
}

.nav-toggle-label span,
.nav-toggle-label span::before,
.nav-toggle-label span::after {
    display: block;
    background: #4a9eff;
    height: 3px;
    width: 100%;
    border-radius: 3px;
    position: absolute;
    transition: all 0.3s;
}

.nav-toggle-label span {
    top: 50%;
    transform: translateY(-50%);
}

.nav-toggle-label span::before {
    content: '';
    top: -10px;
}

.nav-toggle-label span::after {
    content: '';
    bottom: -10px;
}

/* 汉堡菜单动画 */
#nav-toggle:checked ~ .nav-toggle-label span {
    background: transparent;
}

#nav-toggle:checked ~ .nav-toggle-label span::before {
    transform: rotate(45deg);
    top: 0;
}

#nav-toggle:checked ~ .nav-toggle-label span::after {
    transform: rotate(-45deg);
    bottom: 0;
}

/* 移动端样式 */
@media (max-width: 768px) {
    /* 显示汉堡菜单 */
    .nav-toggle-label {
        display: block;
        order: 2;
    }
    
    /* 隐藏Logo */
    .logo {
        display: none;
    }
    
    /* 隐藏桌面端导航 */
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 250px;
        height: calc(100vh - 60px);
        background: rgba(0,0,0,0.95);
        backdrop-filter: blur(10px);
        transition: left 0.3s ease;
        z-index: 1000;
        flex-direction: column;
        padding: 20px 0;
        overflow-y: auto;
    }
    
    .nav-menu li {
        display: block;
        width: 100%;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    .nav-menu a {
        display: block;
        padding: 15px 20px;
        color: #fff;
        text-decoration: none;
        font-size: 16px;
    }
    
    .nav-menu a:hover {
        background: rgba(74,158,255,0.1);
        color: #4a9eff;
    }
    
    /* 显示菜单 */
    #nav-toggle:checked ~ .nav-menu {
        left: 0;
    }
    
    /* 调整搜索框为移动端样式 */
    .search-box {
        display: flex;
        order: 1;
        flex: 1;
        max-width: 200px;
    }
    
    .search-box input {
        background: rgba(255,255,255,0.1);
        border: 1px solid rgba(255,255,255,0.2);
        border-radius: 20px;
        padding: 6px 15px;
        color: #fff;
        font-size: 14px;
        width: 100%;
        outline: none;
    }
    
    .search-box input::placeholder {
        color: rgba(255,255,255,0.6);
    }
    
    .search-box button {
        display: none;
    }
    
    /* 导航栏布局 */
    .nav {
        justify-content: space-between;
        align-items: center;
        gap: 15px;
        padding: 10px 0;
    }
    
    /* 遮罩层 */
    .nav-overlay {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 999;
    }
    
    #nav-toggle:checked ~ .nav-overlay {
        display: block;
    }
}