/* 通用页脚样式 */
.site-footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 10px 0 1px;
    font-size: 14px;
    width: 100%;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: -30px;
}

.link-column {
    width: 23%;
    margin-bottom: 20px;
}

.link-column h3 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 1px;
    padding-bottom: 1px;
    border-bottom: 1px solid #3d566e;
    text-align: left; /* 新增：强制左对齐 */
    padding-left: 0;  /* 移除可能的默认内边距 */
    margin-left: 0;   /* 移除可能的默认外边距 */
}

.link-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.link-column li {
    margin-bottom: 8px;
}

.link-column a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
}

.link-column a:hover {
    color: #fff;
}

/* 社交图标样式 - 修改后 */
.social-links {
    display: flex;
    gap: 15px;
    align-items: center; /* 确保垂直居中 */
}

.social-links a {
    color: #bdc3c7;
    font-size: 24px;
    transition: all 0.3s;
    display: inline-flex; /* 更好的图标对齐 */
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.social-links a:hover {
    color: #fff;
    transform: scale(1.2);
}

/* 完全移除旧的图片样式 */
.social-links img {
    display: none !important;
}

/* 返回顶部按钮样式 */
.icon-top {
    display: none;
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 40px;
    height: 40px;
    background: #e67e22;
    color: white;
    text-align: center;
    line-height: 40px;
    border-radius: 50%;
    text-decoration: none;
    font-size: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    z-index: 999;
    transition: all 0.3s;
}

.icon-top:hover {
    background: #d35400;
    transform: translateY(-3px);
}

.icon-top.show {
    display: block;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .link-column {
        width: 48%;
    }
    
    .social-links {
        justify-content: center; /* 移动端居中 */
        margin-top: 15px;
    }
}

@media (max-width: 480px) {
    .link-column {
        width: 100%;
    }
    
    .social-links a {
        font-size: 20px; /* 移动端适当缩小 */
    }
}
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #3d566e;
            color: #7f8c8d;
            font-size: 12px;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .link-column {
                width: 48%;
            }
        }
        
        @media (max-width: 480px) {
            .link-column {
                width: 100%;
            }
        }