/* 响应式样式 */

/* 大屏幕设备 (小于1200px) */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
    
    .banner-content h1 {
        font-size: 50px;
    }
    
    .banner-content h2 {
        font-size: 30px;
    }
}

/* 中等屏幕设备 (小于992px) */
@media (max-width: 991px) {
    .container {
        max-width: 720px;
    }
    
    .banner-content h1 {
        font-size: 40px;
    }
    
    .banner-content h2 {
        font-size: 26px;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-text, .about-image {
        width: 100%;
    }
    
    .about-image {
        margin-top: 30px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solutions-grid, .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

/* 平板设备 (小于768px) */
@media (max-width: 767px) {
    .container {
        max-width: 540px;
    }
    
    .header .container {
        flex-wrap: wrap;
    }
    
    .logo {
        margin-bottom: 15px;
    }
    
    .nav {
        order: 3;
        width: 100%;
        margin-top: 15px;
    }
    
    .nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav ul li {
        margin: 5px 10px;
    }
    
    .login-btn {
        margin-left: auto;
    }
    
    .banner {
        padding: 150px 0 80px;
    }
    
    .banner-content h1 {
        font-size: 36px;
    }
    
    .banner-content h2 {
        font-size: 22px;
    }
    
    .banner-content p {
        font-size: 16px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 30px;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .solutions-grid, .cases-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* 手机设备 (小于576px) */
@media (max-width: 575px) {
    .container {
        padding: 0 20px;
    }
    
    .banner-content h1 {
        font-size: 30px;
    }
    
    .banner-content h2 {
        font-size: 20px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .testimonial-item {
        padding: 20px 15px;
    }
}