/**
 * 昭通维崑信息技术 - 页脚样式
 */

/* 页脚 */
.footer {
    background-color: var(--secondary-dark);
    color: var(--white);
    padding: var(--spacing-16) 0 0 0;
}

.footer-main {
    padding-bottom: var(--spacing-12);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-8);
}

/* 公司信息 */
.footer-brand {
    grid-column: span 2;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-6);
}

.footer-logo img {
    height: 48px;
    width: auto;
}

.footer-logo-text {
    display: flex;
    flex-direction: column;
}

.footer-logo-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--white);
    line-height: 1.2;
}

.footer-logo-subtitle {
    font-size: var(--font-size-xs);
    color: var(--gray-400);
    line-height: 1.2;
}

.footer-description {
    color: var(--gray-400);
    margin-bottom: var(--spacing-6);
    line-height: var(--line-height-relaxed);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--gray-400);
    font-size: var(--font-size-sm);
}

.footer-contact-item i {
    color: var(--primary-color);
    width: 16px;
    text-align: center;
}

/* 快速链接 */
.footer-links {
    grid-column: span 1;
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-6);
    position: relative;
    padding-bottom: var(--spacing-3);
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

.footer-nav {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.footer-nav-item {
    margin: 0;
}

.footer-nav-link {
    color: var(--gray-400);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.footer-nav-link:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-nav-link::before {
    content: '\f105';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary-color);
    font-size: var(--font-size-xs);
}

/* 业务服务 */
.footer-services {
    grid-column: span 1;
}

/* 底部版权 */
.footer-bottom {
    background-color: rgba(0, 0, 0, 0.3);
    padding: var(--spacing-6) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.footer-copyright {
    color: var(--gray-400);
    font-size: var(--font-size-sm);
}

.footer-copyright a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-copyright a:hover {
    text-decoration: underline;
}

.footer-icp {
    color: var(--gray-500);
    font-size: var(--font-size-xs);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.back-to-top:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 响应式设计 */
@media (max-width: 1199px) {
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-brand {
        grid-column: span 3;
    }
}

@media (max-width: 991px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-6);
    }
    
    .footer-brand {
        grid-column: span 2;
    }
    
    .footer {
        padding: var(--spacing-12) 0 0 0;
    }
    
    .footer-main {
        padding-bottom: var(--spacing-8);
    }
}

@media (max-width: 767px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }
    
    .footer-brand,
    .footer-links,
    .footer-services {
        grid-column: span 1;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-logo img {
        height: 40px;
    }
    
    .footer-logo-title {
        font-size: var(--font-size-lg);
    }
    
    .back-to-top {
        bottom: 16px;
        right: 16px;
        width: 44px;
        height: 44px;
    }
}