/* 响应式设计 - 极简杂志风格 */

@media (max-width: 1200px) {
    .container {
        padding: 0 50px;
    }
    
    header {
        width: 240px;
        padding: 50px 30px;
    }
    
    main {
        margin-left: 240px;
    }
}

@media (max-width: 992px) {
    header {
        position: relative;
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 30px 40px;
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
    
    .navbar {
        flex-direction: row;
        align-items: center;
        gap: 0;
    }
    
    .logo {
        margin-bottom: 0;
    }
    
    nav ul {
        flex-direction: row;
        gap: 30px;
    }
    
    nav a::before {
        left: 0;
        top: auto;
        bottom: 0;
        transform: none;
        width: 0;
        height: 1px;
    }
    
    nav a:hover {
        padding-left: 0;
        padding-bottom: 5px;
    }
    
    nav a:hover::before {
        width: 100%;
        height: 1px;
    }
    
    main {
        margin-left: 0;
    }
    
    .banner {
        height: 80vh;
        padding: 60px 0;
    }
    
    .banner h1 {
        font-size: 56px;
    }
    
    .content-card h2 {
        font-size: 40px;
    }
    
    .grid, .product-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    footer .container {
        flex-direction: column;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 30px;
    }
    
    header {
        flex-direction: column;
        padding: 30px;
        gap: 30px;
    }
    
    nav ul {
        flex-wrap: wrap;
        gap: 20px;
        justify-content: center;
    }
    
    .banner {
        height: 70vh;
        padding: 40px 0;
    }
    
    .banner h1 {
        font-size: 42px;
        letter-spacing: -2px;
    }
    
    .banner p {
        font-size: 16px;
    }
    
    .content-section {
        padding: var(--spacing-md) 0;
    }
    
    .content-card {
        margin-bottom: var(--spacing-md);
    }
    
    .content-card h2 {
        font-size: 32px;
        margin-bottom: 30px;
    }
    
    .content-card h3 {
        font-size: 24px;
        margin-top: 40px;
    }
    
    .error-page h1 {
        font-size: 120px;
    }
    
    .error-page h2 {
        font-size: 28px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .stat-number {
        font-size: 48px;
    }
    
    .card img {
        height: 300px;
    }
    
    .product-card img {
        height: 350px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }
    
    header {
        padding: 20px;
    }
    
    .banner {
        height: 60vh;
    }
    
    .banner h1 {
        font-size: 32px;
        letter-spacing: -1px;
    }
    
    .content-card h2 {
        font-size: 28px;
    }
    
    .content-card h3 {
        font-size: 20px;
    }
    
    .error-page h1 {
        font-size: 80px;
    }
    
    .error-page h2 {
        font-size: 24px;
    }
    
    .grid {
        gap: 40px;
    }
    
    .card img {
        height: 250px;
    }
}