/* 平板端 */
@media (max-width: 1024px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
    }
    
    .nav-menu {
        gap: var(--spacing-xl);
    }
    
    .business-grid,
    .advantages-grid,
    .scenarios-grid,
    .footer-grid,
    .solution-main,
    .about-hero {
        grid-template-columns: 1fr;
    }
    
    .scenario-detail-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        gap: var(--spacing-xl);
    }
    
    .footer-brand {
        grid-column: 1 / -1;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 60px;
        padding-right: 0;
        justify-content: flex-start;
    }
    
    .timeline-dot {
        left: 20px;
    }
    
    .timeline-content {
        max-width: 100%;
    }
}

/* 移动端 */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.375rem;
        --spacing-3xl: 2rem;
    }
    
    .navbar {
        padding: var(--spacing-md) 0;
    }
    
    .navbar {
        position: relative;
        z-index: 100;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 280px;
        height: 100vh;
        height: -webkit-fill-available;
        background: var(--bg-secondary);
        background: #1e293b;
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: var(--spacing-3xl);
        padding: 32px;
        transition: right 0.3s ease;
        box-shadow: var(--shadow-lg);
        z-index: 99;
        -webkit-overflow-scrolling: touch;
        overflow-y: auto;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .menu-toggle {
        display: block;
        z-index: 101;
        position: relative;
        -webkit-tap-highlight-color: transparent;
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .business-card,
    .advantage-card {
        padding: var(--spacing-xl);
    }
    
    .advantage-card {
        flex-direction: column;
        text-align: center;
    }
    
    .advantage-icon {
        margin: 0 auto;
    }
    
    .scenario-detail-grid,
    .values-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .cta-title {
        font-size: var(--font-size-2xl);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: left !important;
    }
    
    .footer-column,
    .footer-contact,
    .footer-brand {
        text-align: left !important;
    }
    
    .footer-column h4,
    .footer-contact h4 {
        text-align: left !important;
    }
    
    .footer-links,
    .footer-links li,
    .footer-links a {
        text-align: left !important;
    }
    
    .footer-contact p {
        justify-content: flex-start !important;
        text-align: left !important;
        overflow: hidden;
    }
    
    .footer-contact p span {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        min-width: 0;
    }
    
    .footer-bottom {
        font-size: var(--font-size-xs);
    }
    
    .footer-beian a {
        display: block;
        margin: var(--spacing-sm) 0;
    }
    
    .solution-features-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    :root {
        --container-padding: 16px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .business-grid,
    .advantages-grid {
        gap: var(--spacing-lg);
    }
    
    .btn-lg {
        padding: var(--spacing-sm) var(--spacing-xl);
        font-size: var(--font-size-base);
    }
}

/* 暗色模式优化 */
@media (prefers-color-scheme: dark) {
    /* 已经是深色主题，这里可以添加额外优化 */
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* 高DPI屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* 可以在这里指定高分辨率图片 */
}

/* 横屏模式优化 */
@media (max-height: 600px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }
    
    .scroll-indicator {
        display: none;
    }
}