/* 响应式设计样式 */
@media screen and (max-width: 768px) {
    nav {
        flex-direction: column;
        padding: 1rem;
    }

    .nav-links {
        margin-top: 1rem;
        flex-direction: column;
        text-align: center;
    }

    .nav-links li {
        margin: 0.5rem 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }
}

@media screen and (max-width: 480px) {
    .logo {
        font-size: 1.2rem;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    main {
        padding: 1rem;
    }
}