/* 关于我们页面样式 */

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 24px;
}

.about-desc {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 16px;
}

.about-image {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.image-placeholder {
    text-align: center;
    color: var(--text-lighter);
}

.image-placeholder i {
    font-size: 64px;
    margin-bottom: 16px;
}

.image-placeholder span {
    display: block;
    font-size: 14px;
}

/* 发展历程 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-color), var(--primary-light));
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-item:nth-child(odd) .timeline-content {
    text-align: right;
    padding-right: 60px;
}

.timeline-item:nth-child(even) .timeline-content {
    padding-left: 60px;
}

.timeline-year {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    box-shadow: 0 4px 12px rgba(26, 86, 219, 0.3);
    z-index: 1;
}

.timeline-content {
    width: 50%;
}

.timeline-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 8px;
}

.timeline-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* 核心优势详情 */
.advantages-detail {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.advantage-detail-card {
    background: #fff;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    transition: var(--transition);
}

.advantage-detail-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

.advantage-detail-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.advantage-detail-icon i {
    font-size: 28px;
    color: #fff;
}

.advantage-detail-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 12px;
}

.advantage-detail-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 生产实力 */
.production-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 48px;
}

.production-stat {
    text-align: center;
    padding: 32px 20px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.stat-icon i {
    font-size: 20px;
    color: #fff;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-unit {
    font-size: 18px;
    font-weight: 400;
}

.stat-label {
    display: block;
    font-size: 14px;
    color: var(--text-light);
    margin-top: 8px;
}

.equipment-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    text-align: center;
    margin-bottom: 24px;
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.equipment-item {
    text-align: center;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.equipment-item i {
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 8px;
    display: block;
}

.equipment-item span {
    font-size: 13px;
    color: var(--text-color);
}

/* 资质证书 */
.certificate-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

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

.certificate-placeholder {
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.certificate-placeholder i {
    font-size: 48px;
    color: var(--text-lighter);
    margin-bottom: 8px;
}

.certificate-name {
    font-size: 14px;
    color: var(--text-color);
    font-weight: 500;
}

/* 响应式 */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 40px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: row;
    }
    
    .timeline-year {
        left: 40px;
        width: 64px;
        height: 64px;
        font-size: 14px;
    }
    
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        width: auto;
        text-align: left;
        padding-left: 100px;
        padding-right: 0;
    }
    
    .advantages-detail {
        grid-template-columns: 1fr;
    }
    
    .production-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .equipment-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .certificate-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .equipment-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}