/* 移动端响应式样式 */
@media (max-width: 768px) {
    /* 特性区域响应式 */
    .features {
        padding: 60px 20px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .feature-item {
        padding: 30px 20px;
    }

    .feature-item i {
        font-size: 36px;
        margin-bottom: 15px;
    }

    .feature-item h3 {
        font-size: 20px;
        margin-bottom: 10px;
    }

    .feature-item p {
        font-size: 15px;
    }

    /* 公司介绍区域响应式 */
    .company-intro {
        padding: 60px 20px;
    }

    .intro-content h2 {
        font-size: 32px;
        margin-bottom: 40px;
    }

    .intro-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .intro-item {
        padding: 30px 20px;
    }

    .intro-item .number {
        font-size: 36px;
        margin-bottom: 8px;
    }

    .intro-item p {
        font-size: 16px;
    }

    /* 新闻区域响应式 */
    .news-section {
        padding: 60px 20px;
    }

    .news-content h2 {
        font-size: 32px;
        margin-bottom: 40px;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .news-item {
        padding: 30px 20px;
    }

    .news-item h3 {
        font-size: 20px;
    }

    .news-item p {
        font-size: 15px;
    }

    /* 英雄区域响应式调整 */
    .hero {
        height: auto;
        min-height: 60vh;
        padding: 100px 20px;
    }

    .hero h1 {
        font-size: 36px;
        margin-bottom: 15px;
    }

    .hero p {
        font-size: 18px;
        margin-bottom: 30px;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .cta-button {
        width: 100%;
        text-align: center;
        padding: 12px 20px;
        font-size: 16px;
    }

    .timeline {
        padding: 20px;
    }
    
    .timeline-item {
        display: flex;
        flex-direction: column;
        margin-bottom: 30px;
        position: relative;
    }
    
    .timeline-item .year {
        font-size: 1.2em;
        font-weight: bold;
        margin-bottom: 10px;
    }
    
    .timeline-item .event {
        padding-left: 0;
        margin-top: 5px;
    }
}

/* 平板设备响应式样式 */
@media (min-width: 769px) and (max-width: 1024px) {
    .features-grid,
    .intro-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .feature-item,
    .intro-item {
        padding: 30px;
    }

    .hero h1 {
        font-size: 48px;
    }

    .hero p {
        font-size: 24px;
    }
}

/* 较小屏幕手机响应式样式 */
@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }

    .feature-item,
    .intro-item,
    .news-item {
        padding: 20px;
    }

    .cta-button {
        padding: 10px 15px;
        font-size: 14px;
    }
}