/* 统一导航栏样式 */
.navbar {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
    padding: 1rem 0;
    z-index: 1000;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.98);
    padding: 0.5rem 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.navbar-brand {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color) !important;
    text-decoration: none;
    transition: all 0.3s ease;
}

.brand-content {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    align-items: flex-start;
}

.brand-name {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    white-space: nowrap;
}

.brand-tagline {
    font-size: 0.75rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.8);
    margin-top: -2px;
    white-space: nowrap;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-tagline span {
    margin: 0 2px;
}

.navbar-brand:hover .brand-name {
    color: var(--secondary-color);
}

.navbar-brand:hover .brand-tagline {
    color: rgba(255, 255, 255, 1);
}

/* 导航链接样式 */
.navbar-nav .nav-link {
    color: var(--text-light) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 100%;
}

/* 响应式设计 */
@media (max-width: 991.98px) {
    .navbar-brand {
        font-size: 1.5rem;
    }
    
    .brand-name {
        font-size: 1.5rem;
    }
    
    .navbar-nav .nav-link {
        margin: 0.25rem 0;
        padding: 0.5rem 1rem;
    }
    
    .navbar-nav .nav-link::after {
        bottom: 0;
        left: 1rem;
        transform: none;
    }
}