/* 版本 1：经典左右布局 */
.about-v1 {
    padding: 60px 0;
}

.about-header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 50px;
}

.about-header h1 {
   font-size: 36px;
   font-weight: bold;
    color: #000;
    margin: 0 30px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 500px;
    gap: 50px;
    margin-bottom: 60px;
}

.company-intro h2 {
   font-size: 24px;
    color: #0066cc;
    margin-bottom: 20px;
    padding-left: 15px;
    border-left: 4px solid #0066cc;
}

.company-intro p {
   font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 30px;
    padding: 30px;
    background: #f8faff;
    border-radius: 12px;
}

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

.stat-number {
    display: block;
   font-size: 36px;
   font-weight: bold;
    color: #0066cc;
    margin-bottom: 5px;
}

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

.company-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

/* 资质展示 */
.certification-section {
    padding-top: 40px;
}

.cert-header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 40px;
}

.cert-header h2 {
   font-size: 28px;
   font-weight: bold;
    color: #000;
    margin: 0 30px;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.cert-item {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s;
    aspect-ratio: 1;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-item:hover {
    transform: translateY(-5px);
}

.cert-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ========== 响应式适配 ========== */

/* 平板横屏及以下（1024px） */
@media (max-width: 1024px) {
    .about-v1 {
        padding: 40px 0;
    }
    
    .about-header h1 {
       font-size: 30px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .company-image {
        max-width: 100%;
    }
    
    .cert-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
}

/* 平板竖屏及以下（768px） */
@media (max-width: 768px) {
    .about-v1 {
        padding: 30px 0;
    }
    
    .about-header {
        flex-direction: column;
        margin-bottom: 30px;
    }
    
    .about-header h1 {
       font-size: 26px;
        margin: 15px 0;
    }
    
    .line-left, .line-right {
        width: 40px;
    }
    
    .about-content {
        gap: 25px;
    }
    
    .company-intro h2 {
       font-size: 20px;
    }
    
    .company-intro p {
       font-size: 15px;
        line-height: 1.6;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding: 20px;
    }
    
    .stat-number {
       font-size: 28px;
    }
    
    .stat-label {
       font-size: 13px;
    }
    
    .company-image img {
        border-radius: 8px;
    }
    
    .cert-header h2 {
       font-size: 22px;
        margin: 0 15px;
    }
    
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .cert-item {
        border-radius: 6px;
    }
}

/* 手机小屏幕（480px） */
@media (max-width: 480px) {
    .about-v1 {
        padding: 20px 0;
    }
    
    .about-header h1 {
       font-size: 22px;
    }
    
    .line-left, .line-right {
        width: 30px;
    }
    
    .company-intro h2 {
       font-size: 18px;
    }
    
    .company-intro p {
       font-size: 14px;
    }
    
    .stats-grid {
        padding: 15px;
    }
    
    .stat-number {
       font-size: 24px;
    }
    
    .stat-label {
       font-size: 12px;
    }
    
    .cert-header h2 {
       font-size: 20px;
    }
}