/* 图片样式定义 */
.hero-image {
    background-image: url('https://images.unsplash.com/photo-1518709268805-4e9042af2176?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.service-image {
    background-size: cover;
    background-position: center;
    transition: transform 0.3s ease;
}

.service-image:hover {
    transform: scale(1.05);
}

.about-image {
    background-image: url('https://images.unsplash.com/photo-1522202176988-66273c2fd55f?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    border-radius: 1rem;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.tech-item {
    background: white;
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.tech-item:hover {
    transform: translateY(-5px);
}

.tech-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 0.5rem;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* 服务图片背景 */
.systems-design-bg {
    background-image: url('https://images.unsplash.com/photo-1558494949-ef010cbdcc31?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=800&q=80');
}

.software-dev-bg {
    background-image: url('https://images.unsplash.com/photo-1461749280684-dccba630e2f6?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=800&q=80');
}

.app-dev-bg {
    background-image: url('https://images.unsplash.com/photo-1512941937669-90a1b58e7e9c?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=800&q=80');
}

.tech-services-bg {
    background-image: url('https://images.unsplash.com/photo-1551434678-e076c223a692?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=800&q=80');
}

.business-solutions-bg {
    background-image: url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=800&q=80');
}

.security-bg {
    background-image: url('https://images.unsplash.com/photo-1563986768609-322da13575f3?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=800&q=80');
}

/* 图片遮罩效果 */
.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%);
    border-radius: 1rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-card:hover .image-overlay {
    opacity: 1;
}

/* 响应式图片 */
@media (max-width: 768px) {
    .tech-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
    
    .hero-image {
        background-attachment: scroll;
    }
}