/* 响应式样式 */

/* 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* 卡片式解决方案 */
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    /* 联系卡片 */
    .contact-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
}

/* 移动设备 (767px 以下) */
@media (max-width: 767px) {
    /* 导航栏 */
    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--darker-bg);
        border-right: 1px solid var(--border-color);
        transition: all var(--transition-normal) ease;
        z-index: 999;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links ul {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        height: 100%;
        gap: 2rem;
    }
    
    .nav-links li {
        width: 100%;
        text-align: center;
    }
    
    .nav-links a {
        font-size: 1.2rem;
        padding: 1rem 0;
        display: block;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    /* 英雄区域 */
    .hero {
        min-height: 80vh;
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 2.2rem;
        margin-top: 0;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    /* 英雄区域亮点响应式 */
    .hero-highlights {
        gap: 1rem;
        flex-wrap: wrap;
    }
    
    .highlight-item {
        min-width: 80px;
    }
    
    .btn {
        padding: 0.8rem 2rem;
        font-size: 0.9rem;
    }
    
    /* 通用样式调整 */
    section {
        padding: 4rem 0;
    }
    
    .section-header {
        margin-bottom: 2.5rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    /* 核心服务 */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .service-card {
        padding: 2rem 1.5rem;
    }
    
    /* 技术优势 */
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .advantage-item {
        padding: 2rem 1.5rem;
    }
    
    /* 成功案例 */
    .cases-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .case-card {
        max-width: 100%;
    }
    
    .case-image {
        height: 200px;
    }
    
    .case-content {
        padding: 1.5rem;
    }
    
    /* 解决方案 */
    .solution-item {
        gap: 2rem;
        margin-bottom: 3rem;
    }
    
    .solution-image {
        height: 300px;
    }
    
    .solution-text {
        padding: 0;
    }
    
    .solution-title {
        font-size: 1.5rem;
    }
    
    /* 卡片式解决方案 */
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .solution-card {
        padding: 1.5rem;
    }
    
    .solution-card-header {
        padding: 1.5rem 1.5rem 1rem;
    }
    
    .solution-card-footer {
        padding: 0 1.5rem 1.5rem;
    }
    
    /* 联系卡片 */
    .contact-cards {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .contact-card {
        padding: 1.5rem;
    }
    
    /* 关于我们 */
    .about-content {
        gap: 2rem;
    }
    
    .about-image {
        height: 350px;
    }
    
    .about-title {
        font-size: 1.5rem;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        margin-top: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    /* 联系我们 */
    .contact-content {
        gap: 2rem;
    }
    
    .contact-info,
    .contact-form {
        padding: 2rem 1.5rem;
    }
    
    .contact-title {
        font-size: 1.3rem;
    }
    
    .contact-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    /* 页脚 */
    .footer {
        padding: 3rem 0 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    /* 修复移动端下横线居中问题 */
    .footer-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-links ul {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .footer-contact-item {
        justify-content: center;
    }
}

/* 小屏移动设备 (480px 以下) */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 0.9rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .service-card,
    .advantage-item,
    .case-card,
    .contact-info,
    .contact-form {
        padding: 1.5rem 1rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        padding: 0.5rem 0;
    }
    
    .nav-links ul {
        gap: 1.5rem;
    }
    
    .nav-links a {
        font-size: 1rem;
    }
}