/* ===================================
   科技风格页脚样式
   作者: AI Assistant
   日期: 2025-12-14
   =================================== */

.tech-footer {
    background: linear-gradient(135deg, #0a0a16 0%, #141625 100%);
    color: #b0c0e0;
    padding: 40px 0 24px;
    border-top: 1px solid rgba(60, 90, 180, 0.2);
    margin-top: 40px;
}

.footer-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 15px;
}

/* === 服务承诺区块 === */
.service-promises {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.promise-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: rgba(20, 25, 45, 0.4);
    border-radius: 12px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(80, 100, 180, 0.15);
}

.promise-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(79, 195, 247, 0.2);
    background: rgba(25, 30, 55, 0.6);
}

.icon-box .icon {
    font-size: 32px;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(40, 50, 90, 0.5);
    border-radius: 12px;
    color: #4fc3f7;
    flex-shrink: 0;
}

.promise-item h3 {
    margin: 0 0 8px;
    font-size: 17px;
    font-weight: 600;
    color: #e0e6ff;
}

.promise-item p {
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
    color: #a0b0d0;
}

/* === 版权信息 === */
.copyright {
    text-align: center;
    font-size: 13px;
    color: #888fb0;
    padding-top: 20px;
    border-top: 1px solid rgba(60, 80, 140, 0.15);
}

.copyright p {
    margin: 0;
    line-height: 1.8;
}

.copyright .site-name {
    color: #4fc3f7;
    font-weight: 600;
}

.copyright .custom-footer {
    display: block;
    margin-top: 6px;
    color: #7a8ab0;
}

.copyright a {
    color: #4fc3f7;
    text-decoration: none;
    transition: color 0.2s;
}

.copyright a:hover {
    color: #81d4fa;
    text-decoration: underline;
}

/* === 响应式优化 === */
@media (max-width: 768px) {
    .tech-footer {
        padding: 30px 0 20px;
    }
    
    .service-promises {
        gap: 16px;
        grid-template-columns: 1fr;
    }
    
    .promise-item {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .icon-box .icon {
        margin: 0 auto;
    }
}

@media (max-width: 480px) {
    .tech-footer {
        padding: 24px 0 16px;
    }
    
    .promise-item {
        padding: 12px;
    }
    
    .icon-box .icon {
        width: 40px;
        height: 40px;
        font-size: 24px;
    }
    
    .promise-item h3 {
        font-size: 15px;
    }
    
    .promise-item p {
        font-size: 12px;
    }
}