.main-footer {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 40px 0 20px;
    margin-top: 60px;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    position: relative;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    color: white;
    margin-bottom: 15px;
    font-size: 1.1rem;
    font-weight: 600;
}

.footer-section p {
    margin: 8px 0;
    opacity: 0.9;
    line-height: 1.5;
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li {
    margin: 6px 0;
    opacity: 0.9;
    position: relative;
    padding-left: 15px;
    transition: var(--transition);
}

.footer-section ul li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: rgba(255, 255, 255, 0.7);
}

.footer-section ul li:hover {
    opacity: 1;
    transform: translateX(5px);
}

.footer-section a {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: underline;
}

.status-indicator {
    display: flex;
    align-items: center;
    margin: 8px 0;
    gap: 8px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    transition: var(--transition);
}

.status-dot.online {
    background-color: #4CAF50;
    box-shadow: 0 0 8px #4CAF50;
}

.status-dot.offline {
    background-color: #f44336;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 20px;
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 20px 0;
}

.footer-bottom p {
    margin: 5px 0;
    opacity: 0.8;
    font-size: 0.9rem;
}

.footer-bottom p:first-child {
    font-weight: 600;
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 25px;
        text-align: center;
    }
    
    .footer-section ul li::before {
        display: none;
    }
    
    .footer-section ul li {
        padding-left: 0;
    }
    
    .status-indicator {
        justify-content: center;
    }
    
    .footer-section ul li:hover {
        transform: none;
    }
}

@media (max-width: 480px) {
    .main-footer {
        padding: 30px 0 15px;
    }
    
    .footer-content {
        padding: 0 15px;
    }
    
    .footer-section h4 {
        font-size: 1rem;
    }
    
    .footer-bottom p {
        font-size: 0.85rem;
    }
}

/* 动画效果 */
.main-footer {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 悬停效果 */
.footer-section h4 {
    transition: color 0.3s ease;
}

.footer-section h4:hover {
    color: rgba(255, 255, 255, 0.9);
}

.status-dot.online:hover {
    transform: scale(1.2);
    box-shadow: 0 0 12px #4CAF50;
}