/* 大屏幕设备 (大于等于1200px) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
    
    .hero-section {
        min-height: 600px;
    }
}

/* 中等屏幕设备 (992px-1199px) */
@media (min-width: 992px) and (max-width: 1199px) {
    .hero-section {
        min-height: 500px;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
}

/* 平板设备 (768px-991px) */
@media (min-width: 768px) and (max-width: 991px) {
    .hero-section {
        padding: 100px 0 60px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .advantage-card {
        padding: 20px;
    }
    
    .case-image {
        height: 180px;
    }
}

/* 手机设备 (小于768px) */
@media (max-width: 767px) {
    .hero-section {
        padding: 80px 0 40px;
        text-align: center;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .stat-item {
        margin-bottom: 15px;
    }
    
    .stat-number {
        font-size: 1.6rem;
    }
    
    .advantage-card {
        padding: 15px;
        margin-bottom: 20px;
    }
    
    .case-image {
        height: 160px;
    }
    
    .contact-info {
        margin-bottom: 30px;
    }
    
    .navbar-brand img.logo {
        height: 30px;
    }
}

/* 超小屏幕设备 (小于576px) */
@media (max-width: 575px) {
    .hero-section {
        padding: 60px 0 30px;
    }
    
    .btn-lg {
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .case-image {
        height: 140px;
    }
    
    .table-responsive {
        font-size: 0.9rem;
    }
}