/* 产品导航 */
.products-nav {
    position: sticky;
    top: 70px;
    z-index: 100;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}

.nav-tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 24px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-btn.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: white;
}

/* 产品列表 */
.products-detail {
    background: var(--dark-bg);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.product-detail-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.product-detail-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.product-header {
    text-align: center;
    margin-bottom: 30px;
}

.product-header .product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--gradient-2);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
}

.product-header h3 {
    font-size: 28px;
    margin-bottom: 12px;
}

.product-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

.product-features {
    margin-bottom: 30px;
    flex-grow: 1;
}

.product-features h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.product-features ul {
    list-style: none;
}

.product-features ul li {
    padding: 10px 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.product-features ul li i {
    color: var(--primary-color);
    font-size: 14px;
}

.product-cta {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.product-cta .btn {
    flex: 1;
    justify-content: center;
}

/* 产品优势 */
.advantages {
    background: var(--darker-bg);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.advantage-item {
    text-align: center;
    padding: 40px 30px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--gradient-1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
}

.advantage-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.advantage-item p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

/* 版本对比 */
.comparison {
    background: var(--dark-bg);
}

.comparison-table {
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
}

.comparison-table thead {
    background: var(--gradient-1);
}

.comparison-table th {
    padding: 20px;
    text-align: center;
    color: white;
    font-weight: 600;
}

.comparison-table td {
    padding: 16px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.comparison-table tbody tr:hover {
    background: rgba(0, 102, 255, 0.05);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.comparison-table td:first-child {
    text-align: left;
    color: var(--text-primary);
    font-weight: 500;
}

.comparison-table i {
    color: var(--primary-color);
    font-size: 18px;
}

.comparison-table .btn {
    padding: 8px 20px;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 10px;
    }
    
    .tab-btn {
        white-space: nowrap;
    }
    
    .product-cta {
        flex-direction: column;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-table {
        font-size: 14px;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 12px 10px;
    }
}

@media (max-width: 480px) {
    .products-nav {
        padding: 15px 0;
    }
    
    .product-detail-card {
        padding: 30px 20px;
    }
}