/* 增强版导航栏样式 */
.navbar-enhanced {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 0.5rem 1rem;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin: 0 0.25rem;
    transition: all 0.3s ease;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

.navbar-nav .nav-link i {
    margin-right: 0.5rem;
    transition: transform 0.3s ease;
}

.navbar-nav .nav-link:hover i {
    transform: scale(1.2);
}

/* 下拉菜单增强样式 */
.dropdown-menu-enhanced {
    border-radius: 10px;
    border: none;
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    padding: 0.5rem 0;
    margin-top: 0.5rem;
    animation: fadeInDown 0.3s ease;
}

.dropdown-menu-enhanced .dropdown-item {
    padding: 0.75rem 1.5rem;
    transition: all 0.2s ease;
    border-radius: 0;
}

.dropdown-menu-enhanced .dropdown-item:hover {
    background-color: #f8f9fa;
    color: #007bff;
    transform: translateX(5px);
}

.dropdown-menu-enhanced .dropdown-item i {
    width: 20px;
    margin-right: 0.75rem;
    text-align: center;
}

.dropdown-divider {
    margin: 0.5rem 0;
    border-top: 1px solid rgba(0,0,0,0.1);
}

/* 动画关键帧 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translate3d(0, -10px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

/* 响应式调整 */
@media (max-width: 992px) {
    .navbar-nav .nav-link {
        padding: 0.5rem 1rem;
        margin: 0.125rem 0;
    }
    
    .dropdown-menu-enhanced {
        box-shadow: none;
        margin-top: 0;
        animation: none;
    }
    
    .dropdown-menu-enhanced .dropdown-item:hover {
        transform: none;
    }
}

/* 深色模式适配 */
@media (prefers-color-scheme: dark) {
    .dropdown-menu-enhanced {
        background-color: #343a40;
        color: #fff;
    }
    
    .dropdown-menu-enhanced .dropdown-item {
        color: #fff;
    }
    
    .dropdown-menu-enhanced .dropdown-item:hover {
        background-color: #495057;
        color: #fff;
    }
}

/* 悬停效果增强 */
.navbar-toggler {
    border: none;
    outline: none !important;
    box-shadow: none !important;
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(0,123,255,.25);
}

/* 活动状态指示器 */
.navbar-nav .nav-link.active {
    background-color: rgba(255,255,255,0.2);
    font-weight: 600;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .navbar-nav .nav-link {
        font-size: 0.95rem;
    }
    
    .dropdown-menu-enhanced .dropdown-item {
        padding: 0.6rem 1.2rem;
    }
}