/* css/footer.css - 底部样式 */
.website-footer {
    --primary-color: #1E40AF;
    --secondary-color: #3B82F6;
    --accent-color: #06B6D4;
    --footer-bg: #1F2937;
    --footer-text: #F9FAFB;
    --footer-border: rgba(255, 255, 255, 0.1);
    --footer-hover: rgba(255, 255, 255, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.website-footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    position: relative;
    overflow: hidden;
}

.website-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent, 
        var(--primary-color), 
        var(--accent-color), 
        transparent
    );
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 主要底部区域 */
.footer-main {
    padding: 4rem 0 2rem;
}

.footer-main .footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    align-items: start;
}

.footer-section {
    display: flex;
    flex-direction: column;
}

/* 公司信息 */
.company-info .footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.company-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

/* 社交链接 */
.social-links {
    display: flex;
    gap: 0.75rem;
}

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

.social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.social-link:hover::before {
    left: 100%;
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(30, 64, 175, 0.3);
}

.social-icon {
    font-size: 1.2rem;
}

/* 底部标题 */
.footer-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 1px;
}

/* 链接列表 */
.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    padding: 0.5rem 0;
    position: relative;
    display: inline-flex;
    align-items: center;
}

.footer-link::before {
    content: '';
    position: absolute;
    left: -0.5rem;
    width: 3px;
    height: 0;
    background: var(--accent-color);
    border-radius: 2px;
    transition: var(--transition);
}

.footer-link:hover {
    color: white;
    padding-left: 1rem;
}

.footer-link:hover::before {
    height: 100%;
}

/* 联系信息 */
.contact-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: rgba(255, 255, 255, 0.8);
}

.contact-icon {
    font-size: 1.1rem;
    opacity: 0.8;
}

.contact-text {
    flex: 1;
}

/* 在线客服按钮 */
.online-service {
    margin-top: 1rem;
}

.service-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.service-btn:hover::before {
    left: 100%;
}

.service-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}

/* 底部版权区域 */
.footer-bottom {
    border-top: 1px solid var(--footer-border);
    padding: 1.5rem 0;
    background: rgba(0, 0, 0, 0.2);
}

.footer-bottom .footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.footer-links-bottom {
    display: flex;
    gap: 1.5rem;
}

.footer-links-bottom .footer-link {
    padding: 0;
    font-size: 0.9rem;
}

.footer-links-bottom .footer-link:hover {
    padding-left: 0;
}

.footer-links-bottom .footer-link::before {
    display: none;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

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

.back-to-top:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 6px 25px rgba(6, 182, 212, 0.4);
}

.back-to-top-icon {
    font-size: 1.2rem;
    font-weight: bold;
}

/* 响应式设计 */
@media (max-width: 968px) {
    .footer-main .footer-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .footer-main {
        padding: 3rem 0 1.5rem;
    }
}

@media (max-width: 640px) {
    .footer-main .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom .footer-container {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links-bottom {
        justify-content: center;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .footer-container {
        padding: 0 0.5rem;
    }
    
    .footer-main {
        padding: 2rem 0 1rem;
    }
    
    .social-links {
        justify-content: center;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.footer-section {
    animation: fadeInUp 0.6s ease-out;
}

.footer-section:nth-child(1) { animation-delay: 0.1s; }
.footer-section:nth-child(2) { animation-delay: 0.2s; }
.footer-section:nth-child(3) { animation-delay: 0.3s; }
.footer-section:nth-child(4) { animation-delay: 0.4s; }

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

.service-btn.loading {
    animation: pulse 1.5s infinite;
}