/* 导航栏 - 深色玻璃拟态 */
.navbar {
    background: rgba(15, 15, 26, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-shadow: 0 0 30px rgba(124, 58, 237, 0.5);
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-md);
    position: relative;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(124, 58, 237, 0.1);
}

.nav-link.active {
    color: var(--primary-light);
    background: rgba(124, 58, 237, 0.15);
}

.nav-link.active::after {
    display: none;
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    padding: 0.5rem;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    border-radius: var(--radius-md);
    font-weight: 500;
}

.dropdown-item:hover {
    background: rgba(124, 58, 237, 0.1);
    color: var(--primary-light);
}

/* 登录按钮 */
.navbar-login-btn {
    padding: 0.625rem 1.5rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.navbar-login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(124, 58, 237, 0.4);
}

/* 页脚 */
.footer {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    text-align: center;
    color: var(--text-muted);
}

/* 页面布局 */
.page {
    min-height: calc(100vh - 72px);
}

.page-header {
    background: var(--bg-secondary);
    padding: 4rem 0;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.page-content {
    padding-bottom: 4rem;
}

/* 响应式 */
@media (max-width: 1024px) {
    .navbar-nav {
        gap: 0.25rem;
    }

    .nav-link {
        font-size: 0.875rem;
        padding: 0.5rem 0.75rem;
    }
}

@media (max-width: 768px) {
    .navbar-container {
        padding: 0 16px;
        height: 64px;
    }

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

    .navbar-nav {
        display: none;
    }

    .page-title {
        font-size: 2rem;
    }

    .page-subtitle {
        font-size: 1.125rem;
    }

    .page {
        min-height: calc(100vh - 64px);
    }
}