/* ========================================
   页脚样式
   ======================================== */

.footer {
    background-color: var(--primary-dark);
    color: var(--text-white);
    padding-top: var(--space-xxl);
}

.footer-main {
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--space-xl);
}

/* 公司信息 */
.footer-brand .logo {
    margin-bottom: var(--space-md);
}

.footer-brand .logo-icon {
    background: linear-gradient(135deg, var(--secondary-blue), #fff);
}

.footer-brand .logo-icon-img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.footer-brand .logo-text .cn,
.footer-brand .logo-text .en {
    color: #fff;
}

.footer-desc {
    font-size: var(--fs-small);
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.footer-cert {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.cert-badge {
    padding: 4px 12px;
    background-color: rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    font-size: var(--fs-xs);
    color: rgba(255,255,255,0.8);
}

/* 导航链接 */
.footer-title {
    font-size: var(--fs-h4);
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: #fff;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    font-size: var(--fs-small);
    color: rgba(255,255,255,0.7);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.footer-links a::before {
    content: '›';
    color: var(--secondary-blue);
}

.footer-links a:hover {
    color: #fff;
}

/* 联系方式 */
.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.footer-contact-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.footer-contact-info {
    flex: 1;
}

.footer-contact-label {
    font-size: var(--fs-xs);
    color: rgba(255,255,255,0.6);
    margin-bottom: 2px;
}

.footer-contact-value {
    font-size: var(--fs-small);
    color: #fff;
    font-weight: 500;
}

.footer-contact-value a:hover {
    color: var(--secondary-blue);
}

/* 社交媒体 */
.footer-social {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background-color: var(--secondary-blue);
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
    fill: #fff;
}

/* 底部版权 */
.footer-bottom {
    padding: var(--space-md) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--fs-small);
    color: rgba(255,255,255,0.5);
}

.footer-bottom a {
    color: rgba(255,255,255,0.7);
}

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

/* 响应式 */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-sm);
        text-align: center;
    }
}