* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.nav-wrapper {
    background: #0b3575;
    padding: 12px 0;
    position: relative;
    z-index: 1000;
}

.nav-wrapper > div {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex !important;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 5px;
}

.nav-menu li {
    position: relative;
}



.nav-menu li .submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #0b3575;
    border-top: 2px solid #d4a82b;
    list-style: none;
    padding: 0;
    z-index: 1001;
    box-shadow: 0 6px 20px rgba(11, 53, 117, 0.3);
}

.nav-menu li:hover .submenu {
    display: block;
}

.nav-menu li .submenu li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-menu li .submenu li:last-child {
    border-bottom: none;
}

.nav-menu li .submenu li a {
    padding: 12px 0;
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    transition: all 0.3s;
    border-left: none;
}

.nav-menu li .submenu li a:hover {
    background: #d4a82b;
    color: #fff;
    border-left: none;
    padding-left: 0;
}

.nav-menu li a {
    display: block;
    padding: 10px 25px;
    color: #ccc;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s;
}

.nav-menu li.active a {
    background: #d4a82b;
    color: #fff;
}

.nav-menu li:hover a {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.hamburger {
    display: none;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    padding: 8px 12px;
    margin-left: auto;
}

/* 在992px及以下屏幕使用折叠式导航 */
@media (max-width: 992px) {
    .nav-wrapper > div {
        flex-wrap: nowrap;
        justify-content: space-between;
        align-items: center;
    }
    
    .nav-menu {
        display: none !important;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column !important;
        background: #0b3575;
        padding: 10px 0;
        z-index: 999;
        gap: 0;
    }
    
    .nav-menu.show {
        display: flex !important;
    }
    
    .hamburger {
        display: block !important;
    }
    
    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .nav-menu li:last-child {
        border-bottom: none;
    }
    
    .nav-menu li a {
        padding: 12px 20px;
        font-size: 15px;
        text-align: left;
        border-radius: 0;
        display: block;
        width: 100%;
    }
    
    .nav-menu li.active a {
        background: rgba(212, 168, 43, 0.2);
        color: #d4a82b;
    }
}

/* 超小屏幕设备优化 */
@media (max-width: 480px) {
    .nav-menu li a {
        padding: 10px 15px;
        font-size: 14px;
    }
    
    .hamburger {
        padding: 6px 10px;
        font-size: 20px;
    }
}