/* 响应式样式 - 现代扁平设计 */

/* 大屏幕 1200px */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
        gap: 32px;
    }
}

/* 平板横屏 992px */
@media (max-width: 992px) {
    .about-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .about-image::before {
        display: none;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-info {
        order: 2;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    .hero-stats {
        gap: 40px;
    }
}

/* 平板竖屏 768px */
@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 16px;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        border-top: 1px solid var(--gray-100);
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 4px;
    }
    
    .nav-list a {
        display: block;
        padding: 14px 16px;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero {
        padding: 140px 0 80px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 17px;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .section {
        padding: 70px 0;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-list-item {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .news-list-image {
        height: 200px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 32px;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .page-banner {
        padding: 120px 0 50px;
    }
    
    .page-banner h1 {
        font-size: 36px;
    }
    
    .timeline-item {
        gap: 20px;
    }
    
    .timeline-year {
        width: 40px;
        height: 40px;
        font-size: 11px;
    }
    
    .cta-content h2 {
        font-size: 28px;
    }
}

/* 手机 576px */
@media (max-width: 576px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .header .container {
        height: 64px;
    }
    
    .nav {
        top: 64px;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 30px;
    }
    
    .hero-badge {
        font-size: 13px;
        padding: 6px 12px;
    }
    
    .section {
        padding: 56px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .section-desc {
        font-size: 16px;
    }
    
    .feature-card {
        padding: 28px 24px;
    }
    
    .about-list li {
        font-size: 14px;
    }
    
    .product-info {
        padding: 20px;
    }
    
    .news-content {
        padding: 20px;
    }
    
    .contact-info {
        padding: 32px 24px;
    }
    
    .contact-form .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer {
        padding: 56px 0 0;
    }
    
    .footer-bottom {
        padding: 20px 0;
    }
    
    .btn {
        padding: 12px 24px;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
    
    .page-item {
        min-width: 40px;
        height: 40px;
        padding: 0 12px;
    }
}

/* 超小屏幕 375px */
@media (max-width: 375px) {
    .hero-title {
        font-size: 26px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .cta-content h2 {
        font-size: 24px;
    }
}

/* 打印样式 */
@media print {
    .header,
    .nav-toggle,
    .hero-buttons,
    .contact-cta,
    .footer {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }
    
    .section {
        padding: 24px 0;
        page-break-inside: avoid;
    }
    
    .hero {
        background: none;
        color: #000;
        padding: 24px 0;
    }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    /* 可选：添加深色模式样式 */
}