/* ===================================
   响应式样式
   =================================== */

/* 平板设备 (768px - 1024px) */
@media screen and (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .banner-title {
        font-size: 2.5rem;
    }
    
    .banner-subtitle {
        font-size: 1.3rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

/* 平板设备竖屏和手机横屏 (600px - 768px) */
@media screen and (max-width: 768px) {
    .navbar-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-md);
        transition: left 0.3s ease;
    }
    
    .navbar-menu.active {
        left: 0;
    }
    
    .navbar-toggle {
        display: flex;
    }
    
    .navbar-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .navbar-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .navbar-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .banner {
        min-height: 500px;
    }
    
    .banner-title {
        font-size: 2rem;
    }
    
    .banner-subtitle {
        font-size: 1.1rem;
    }
    
    .banner-description {
        font-size: 1rem;
    }
    
    .banner-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .product-detail-title {
        font-size: 2rem;
    }
    
    .product-detail-tech {
        flex-wrap: wrap;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* 手机设备 (< 600px) */
@media screen and (max-width: 600px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-lg: 1.5rem;
        --spacing-md: 1rem;
        --spacing-sm: 0.75rem;
    }
    
    .banner {
        min-height: 400px;
    }
    
    .banner-title {
        font-size: 1.5rem;
    }
    
    .banner-subtitle {
        font-size: 1rem;
    }
    
    .banner-description {
        font-size: 0.9rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .section-subtitle {
        font-size: 0.95rem;
    }
    
    .product-card-header {
        padding: var(--spacing-md);
    }
    
    .product-card-body {
        padding: var(--spacing-md);
    }
    
    .product-card-title {
        font-size: 1.1rem;
    }
    
    .product-detail {
        padding: var(--spacing-lg) 0;
    }
    
    .product-detail-header {
        padding: var(--spacing-xl) 0 var(--spacing-lg);
    }
    
    .product-detail-title {
        font-size: 1.5rem;
    }
    
    .detail-section-title {
        font-size: 1.5rem;
    }
    
    .feature-list {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

/* 小屏手机设备 (< 400px) */
@media screen and (max-width: 400px) {
    .navbar-container {
        padding: var(--spacing-sm);
    }
    
    .navbar-logo {
        font-size: 1.2rem;
    }
    
    .navbar-logo-icon {
        font-size: 1.5rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .banner,
    .footer,
    .back-button {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .product-card,
    .case-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}