/* 底部样式优化 */
.site-footer {
    position: relative;
    background: linear-gradient(to bottom, #2c2c2c, #1a1a1a);
    color: #fff;
}

.footer-main {
    padding: 60px 0 40px;
}

/* 公司简介样式 */
.footer-about h3 {
    color: #fff;
    font-size: 24px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 15px;
}

.footer-about h3:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background: #FF0000;
}

.footer-about p {
    color: #999;
    line-height: 1.8;
    margin-bottom: 25px;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: #fff;
    font-size: 20px;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #FF0000;
    transform: translateY(-3px);
}

/* 联系方式样式 */
.footer-contact h3 {
    color: #fff;
    font-size: 24px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 15px;
}

.footer-contact h3:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background: #FF0000;
}

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

.footer-contact ul li {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: #999;
}

.footer-contact ul li i {
    width: 30px;
    color: #FF0000;
    font-size: 18px;
}

/* 二维码样式 */
.footer-qrcode h3 {
    color: #fff;
    font-size: 24px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 15px;
}

.footer-qrcode h3:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background: #FF0000;
}

.qrcode-wrapper {
    display: flex;
    gap: 30px;
}

.qrcode-item {
    text-align: center;
}

.qrcode-item img {
    width: 120px;
    height: 120px;
    border: 4px solid rgba(255,255,255,0.1);
    border-radius: 4px;
}

.qrcode-item p {
    margin-top: 10px;
    color: #999;
}

/* 版权信息样式 */
.footer-bottom {
    background: #111;
    padding: 20px 0;
    text-align: center;
}

.copyright {
    color: #666;
    font-size: 14px;
}

.copyright a {
    color: #999;
    text-decoration: none;
    transition: color 0.3s ease;
}

.copyright a:hover {
    color: #FF0000;
}

.copyright .divider {
    margin: 0 10px;
    color: #444;
}

/* 返回顶部按钮优化 */
.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 50px;
    height: 50px;
    background: #FF0000;
    color: #fff;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(255,0,0,0.3);
}

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

.back-to-top:hover {
    background: #CC0000;
    transform: translateY(-5px);
}

.back-to-top i {
    font-size: 20px;
}

/* 响应式优化 */
@media (max-width: 992px) {
    .footer-main {
        padding: 40px 0 20px;
    }
    
    .footer-about,
    .footer-contact,
    .footer-qrcode {
        margin-bottom: 30px;
    }
    
    .qrcode-wrapper {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .footer-about h3,
    .footer-contact h3,
    .footer-qrcode h3 {
        font-size: 20px;
    }
    
    .qrcode-item img {
        width: 100px;
        height: 100px;
    }
    
    .back-to-top {
        right: 20px;
        bottom: 20px;
        width: 40px;
        height: 40px;
    }
}