/* 主导航菜单样式 */
.main-nav {
    position: relative;
}

/* 导航列表样式 */
.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

/* 导航项样式 */
.nav-list > li {
    position: relative;
    margin: 5px 2px;
}

/* 导航链接样式 - 行政蓝#163762 */
.nav-list > li > a {
    display: block;
    padding: 12px 18px;
    color: #163762;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    white-space: nowrap;
}

/* 鼠标悬停效果 */
.nav-list > li > a:hover {
    background-color: #163762;
    color: white;
}

/* 子菜单样式 */
.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    list-style: none;
    padding: 0;
    margin: 0;
    width: 200px;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
}

/* 子菜单项样式 */
.submenu li a {
    display: block;
    padding: 12px 20px;
    color: #163762;
    text-decoration: none;
    transition: all 0.3s ease;
}

/* 子菜单悬停效果 */
.submenu li a:hover {
    background-color: #f5f5f5;
}

/* 显示子菜单 */
.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
}

/* 响应式设计 - 平板和手机端 */
@media (max-width: 1024px) {
    .nav-list > li > a {
        padding: 10px 15px;
        font-size: 15px;
    }
}

@media (max-width: 768px) {
    .nav-list {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        z-index: 99;
    }
    
    .nav-list.active {
        display: flex;
    }
    
    .nav-list > li {
        width: 100%;
        margin: 0;
    }
    
    .nav-list > li > a {
        padding: 15px 20px;
    }
    
    /* 移动端子菜单样式 */
    .submenu {
        position: static;
        width: 100%;
        box-shadow: none;
        display: none;
        opacity: 1;
        visibility: visible;
    }
    
    .submenu.active {
        display: block;
    }
    
    .submenu li a {
        padding-left: 40px;
    }
}