.main-content {
    width: 70%; /* 默认全屏时70%宽度 */
    margin: 0 auto;
    transition: width 0.3s ease; /* 添加平滑过渡效果 */
    box-sizing: border-box;
        }
        
/* 响应式布局调整 */
@media (max-width: 1600px) {
    .main-content,
    .footer-content {
        width: 80%;  
    }
}

@media (max-width: 1400px) {
    .main-content,
    .footer-content {
        width: 90%;
    }
}

@media (max-width: 1000px) {
    .main-content,
    .footer-content {
        width: 90%;
    }
}
@media (max-width: 800px) {
    .main-content,
    .footer-content {
        width: 90%;
    }
}

@media (max-width: 600px) {
    .main-content,
    .footer-content {
        width: 98%;
        padding: 0 10px;
    }
}