.product-filters {
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.filter-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    padding: 12px 24px;
    border: 2px solid var(--border-color);
    background: var(--background-white);
    color: var(--text-secondary);
    border-radius: 25px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.product-specs {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    flex-wrap: wrap;
}

.spec-tag {
    padding: 4px 8px;
    background: var(--background-light);
    color: var(--text-secondary);
    font-size: 12px;
    border-radius: 4px;
}

.product-price {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    margin-top: var(--spacing-sm);
}

/* 技术优势卡片样式 */
.tech-advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.tech-advantage-card {
    background: white;
    border-radius: 20px;
    padding: var(--spacing-lg);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(184, 134, 11, 0.1);
}

.tech-advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.tech-advantage-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 60px rgba(184, 134, 11, 0.15);
}

.tech-advantage-card:hover::before {
    transform: scaleX(1);
}

.tech-card-icon {
    position: relative;
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-card-icon .icon-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    opacity: 0.1;
    transition: all 0.4s ease;
}

.tech-advantage-card:hover .tech-card-icon .icon-bg {
    opacity: 0.2;
    transform: scale(1.1);
}

.tech-card-icon .icon {
    font-size: 36px;
    z-index: 2;
    position: relative;
}

.tech-card-content h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.tech-card-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.tech-stats {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

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

.stat-number {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* 服务保障样式 */
.service-guarantee-section {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
}

.service-guarantee-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

/* 服务时间线 */
.service-timeline {
    position: relative;
    margin: var(--spacing-xl) 0;
    z-index: 1;
}

.timeline-item {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.timeline-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
}

.marker-icon {
    width: 60px;
    height: 60px;
    background: white;
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(184, 134, 11, 0.2);
    z-index: 2;
}

.marker-line {
    width: 3px;
    height: 80px;
    background: linear-gradient(180deg, var(--primary-color), var(--border-color));
    margin-top: 8px;
}

.marker-line.last {
    display: none;
}

.timeline-content {
    flex: 1;
    background: white;
    padding: var(--spacing-lg);
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    position: relative;
    border-left: 4px solid var(--primary-color);
}

.timeline-badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-md);
    background: var(--primary-color);
    color: white;
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
}

.timeline-content h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.service-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.service-list li {
    padding: 6px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 20px;
}

.service-list li::before {
    content: '✓';
    color: var(--primary-color);
    font-weight: 700;
    position: absolute;
    left: 0;
}

/* 服务保障卡片 */
.service-guarantee-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    position: relative;
    z-index: 1;
}

.guarantee-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.guarantee-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.guarantee-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(184, 134, 11, 0.15);
}

.guarantee-card:hover::before {
    opacity: 0.05;
}

.guarantee-icon {
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 2;
}

.icon-circle {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto;
    box-shadow: 0 8px 20px rgba(184, 134, 11, 0.3);
}

.guarantee-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    position: relative;
    z-index: 2;
}

.guarantee-detail {
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 2;
}

.guarantee-time {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.guarantee-desc {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.guarantee-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 14px;
    position: relative;
    z-index: 2;
}

@media (max-width: 768px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-buttons {
        justify-content: flex-start;
    }
    
    .filter-btn {
        padding: 10px 18px;
        font-size: 14px;
    }

    .tech-advantages-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .tech-advantage-card {
        padding: var(--spacing-md);
    }

    .tech-card-icon {
        width: 60px;
        height: 60px;
    }

    .tech-card-icon .icon {
        font-size: 28px;
    }

    .tech-stats {
        gap: var(--spacing-md);
    }

    .timeline-item {
        gap: var(--spacing-md);
    }

    .marker-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }

    .timeline-content {
        padding: var(--spacing-md);
    }

    .service-guarantee-cards {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}