/* =========================================
   Footer - 统一页脚
   Project: sosoll.com
   ========================================= */

.footer {
    background: rgba(5, 10, 20, 0.9);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 80px 0 40px;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-main);
    opacity: 0.5;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--neon-blue);
    color: #000;
    transform: translateY(-3px);
}

.footer-links h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--gradient-main);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--neon-blue);
    padding-left: 8px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.footer-contact .icon {
    color: var(--neon-blue);
    font-size: 1.2rem;
    margin-top: 2px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 30px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (max-width: 992px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 576px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer {
        padding: 60px 0 30px;
    }
}