/* 移动端样式优化 - 仅在小屏设备上应用 */
@media (max-width: 768px) {
    /* 页脚移动端优化 */
    .footer {
        padding: 4rem 0 2rem;
    }
    
    .footer__inner {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .footer__branding {
        grid-column: 1 / -1;
        text-align: center;
        margin-bottom: 1.5rem;
    }
    
    .footer__description {
        max-width: 100%;
        margin: 0 auto;
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    .footer__navigation {
        grid-column: 1 / -1;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .footer__nav-column {
        margin-bottom: 1.5rem;
    }
    
    .footer__nav-title {
        font-size: 1.1rem;
        margin-bottom: 1rem;
    }
    
    .footer__nav-list {
        font-size: 0.9rem;
    }
    
    .footer__bottom {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
        text-align: center;
    }
    
    .footer__social {
        display: flex;
        justify-content: center;
    }
    
    .footer__social li a, 
    .footer__social-link {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }
    
    .footer__copyright {
        font-size: 0.8rem;
    }
}

@media (max-width: 576px) {
    /* 极小屏幕页脚优化 */
    .footer {
        padding: 3rem 0 1.5rem;
    }
    
    .footer__inner {
        grid-template-columns: 1fr;
    }
    
    .footer__navigation {
        grid-template-columns: 1fr;
    }
    
    .footer__nav-column h4,
    .footer__nav-title {
        text-align: center;
    }
    
    .footer__nav-column h4::after,
    .footer__nav-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer__nav-list,
    .footer__nav-column ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.75rem;
        font-size: 0.85rem;
    }
    
    .footer__nav-list li,
    .footer__nav-column ul li {
        margin-bottom: 0.5rem;
    }
    
    .footer__nav-list li a,
    .footer__nav-column ul li a {
        padding: 4px 8px;
    }
    
    .footer__contact {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .footer__social {
        gap: 0.75rem;
    }
    
    .footer__social li a,
    .footer__social-link {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
    
    /* 适配页脚在两个不同页面的不同结构 */
    .footer__top {
        display: flex;
        flex-direction: column;
    }
    
    .footer__logo {
        text-align: center;
        margin-bottom: 1.5rem;
    }
    
    .footer__nav {
        display: flex;
        flex-direction: column;
        gap: 2rem;
    }
}