/* 页脚样式 */
.footer {
    background: linear-gradient(135deg, #333 0%, #111 100%);
    color: white;
    padding: 100px 0 40px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #0066cc, #0088ff);
}

.footer::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.05)"/></svg>');
    animation: pulse 20s infinite;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 60px;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}

.footer-column {
    transition: all 0.3s ease;
}

.footer-column:hover {
    transform: translateY(-10px);
}

.footer-column img {
    display: block;
}

.footer-column h3 {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 30px;
    color: white;
    position: relative;
    display: inline-block;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #0066cc, #0088ff);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.footer-column:hover h3::after {
    width: 100%;
}

.footer-column p {
    line-height: 1.8;
    color: #ccc;
    transition: all 0.3s ease;
}

.footer-column:hover p {
    color: #fff;
}

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

.footer-links li {
    margin-bottom: 15px;
    position: relative;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.215, 0.61, 0.355, 1);
    position: relative;
    display: inline-block;
    padding-left: 20px;
}

.footer-links a::before {
    content: '→';
    position: absolute;
    left: 0;
    top: 0;
    transition: all 0.3s ease;
    color: #0066cc;
}

.footer-links a:hover {
    color: #0066cc;
    padding-left: 30px;
}

.footer-links a:hover::before {
    left: 5px;
    transform: rotate(90deg);
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid #444;
    color: #ccc;
    position: relative;
    z-index: 1;
}

.footer-bottom p {
    transition: all 0.3s ease;
}

.footer-bottom:hover p {
    color: #fff;
}

/* 社交媒体图标 */
.social-links {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all 0.4s cubic-bezier(0.215, 0.61, 0.355, 1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.social-link:hover {
    transform: translateY(-5px) rotate(10deg);
    background: #0066cc;
    box-shadow: 0 10px 30px rgba(0, 102, 204, 0.4);
}

/* 动画效果 */
@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.pulse {
    animation: pulse 2s infinite;
}