/* 响应式样式 */

/* 大型设备 (大于1200px) */
@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
    
    .footer-nav {
        gap: 40px;
    }
}

/* 中型设备 (小于992px) */
@media (max-width: 992px) {
    .container {
        max-width: 720px;
    }
    
    .footer-top {
        flex-direction: column;
        gap: 30px;
        align-items: center;
    }
    
    .footer-logo {
        text-align: center;
        margin-bottom: 0;
    }
    
    .footer-logo img {
        margin: 0 auto;
        display: block;
    }
    
    .footer-slogan {
        max-width: 100%;
        text-align: center;
    }
    
    .footer-nav {
        justify-content: center;
        width: 100%;
        flex-wrap: wrap;
        gap: 30px;
    }
    
    .footer-social {
        text-align: center;
        width: 100%;
    }
    
    .footer-social h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .social-icons {
        justify-content: center;
    }
}

/* 小型设备 (小于768px) */
@media (max-width: 768px) {
    .container {
        max-width: 540px;
        padding: 0 15px;
    }
    
    .footer-nav {
        flex-wrap: wrap;
        gap: 30px;
        justify-content: space-between;
    }
    
    .footer-nav-column {
        width: calc(50% - 15px);
        margin-bottom: 20px;
    }
    
    .footer-nav-column h4::after {
        left: 0;
        transform: none;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 20px;
        padding-top: 20px;
    }
    
    .app-badges {
        justify-content: center;
    }
    
    .language-selector {
        margin-left: 0;
        margin-top: 10px;
    }
}

/* 超小型设备 (小于576px) */
@media (max-width: 576px) {
    .container {
        padding: 0 10px;
    }
    
    .footer-nav {
        flex-direction: column;
        gap: 25px;
        align-items: center;
    }
    
    .footer-nav-column {
        width: 100%;
        text-align: center;
        margin-bottom: 15px;
    }
    
    .footer-nav-column h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .social-icons {
        justify-content: center;
    }
    
    .app-badges {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .copyright p {
        font-size: 0.8rem;
        line-height: 1.5;
    }
}