/* Footer */
            footer {
                background: linear-gradient(135deg, var(--blue), var(--accent));
                color: white;
                padding: 5rem 0 2rem;
            }

            .footer-logo-icon {
                height: 100px;
                width: auto;
                margin-bottom: 1.5rem;
                display: block;
            }

            .footer-content {
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
                gap: 3rem;
                margin-bottom: 3rem;
            }

            .footer-column h3 {
                color: white;
                margin-bottom: 1.5rem;
                font-size: 1.3rem;
            }

            .footer-links {
                list-style: none;
            }

            .footer-links li {
                margin-bottom: 0.8rem;
            }

            .footer-links a {
                color: rgba(255, 255, 255, 0.7);
                text-decoration: none;
                transition: var(--transition);
                font-size: 0.95rem;
            }

            .footer-links a:hover {
                color: var(--secondary);
            }

            .footer-bottom {
                text-align: center;
                padding-top: 2rem;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
                color: rgba(255, 255, 255, 0.7);
                font-size: 0.9rem;
            }
            /* ===== Footer 响应式设计 ===== */

/* 平板竖屏 (768px - 991px) */
@media (max-width: 991px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .footer-column:first-child {
        grid-column: 1 / -1;
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .footer-logo-icon {
        height: 80px;
    }
}

/* 手机横屏 (576px - 767px) */
@media (max-width: 767px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .footer-column {
        text-align: center;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .footer-column:first-child {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .footer-logo-icon {
        margin: 0 auto;
        display: block;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .footer-bottom p {
        font-size: 0.9rem;
        text-align: center;
    }
}

/* 小手机 (480px - 575px) */
@media (max-width: 575px) {
    .footer-content {
        gap: 1.5rem;
    }
    
    .footer-column:first-child {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
    }
    
    .footer-logo-icon {
        max-width: 150px;
        margin: 0 auto;
    }
    
    .footer-column p {
        text-align: center;
        margin-left: auto;
        margin-right: auto;
    }
    
    .footer-bottom p {
        font-size: 0.8rem;
        line-height: 1.4;
    }
}

/* 超小手机 (小于480px) */
@media (max-width: 479px) {
    footer {
        padding: 3rem 0 2rem;
    }
    
    .footer-content {
        gap: 1.5rem;
    }
    
    .footer-logo-icon {
        max-width: 120px;
    }
    
    .footer-bottom p {
        font-size: 0.75rem;
    }
}

/* 高DPI屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .footer-logo-icon {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* 打印样式 */
@media print {
    footer {
        display: none !important;
    }
}