/**
 * Block Cooperate Styles
 * 合作伙伴区块样式文件
 * 
 * @package Nenghui Energy Theme
 * @since 1.0.0
 */

/* 合作伙伴区块基础样式 */
.cooperate-block {
    padding: 60px 0;
    background: #ffffff;
    overflow: hidden;
}

.cooperate-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 标题区域样式 */
.cooperate-header {
    text-align: center;
    margin-bottom: 50px;
    padding: 30px 0;
}

.cooperate-title {
    font-size: 36px;
    font-weight: 700;
    color: #333333;
    margin: 0;
    line-height: 1.3;
    letter-spacing: -0.5px;
    position: relative;
}

.cooperate-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #3498db, #2980b9);
    border-radius: 2px;
}

/* 合作伙伴内容区域 */
.cooperate-content {
    margin-top: 40px;
}

/* 合作伙伴卡片样式 */
.cooperate-cards {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    background: #f8f9fa;
    padding: 20px;
}

.cards-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    align-items: center;
    justify-content: center;
}

.card-slide {
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    flex: 0 0 calc(25% - 22.5px);
    min-height: 120px;
    min-width: 200px;
    max-width: 250px;
    position: relative;
    overflow: hidden;
}

.card-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.02), rgba(0, 86, 179, 0.02));
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.card-slide:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 123, 255, 0.08);
}

.card-slide:hover::before {
    opacity: 1;
}

.card-slide img {
    max-width: 100%;
    max-height: 80px;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: grayscale(0%);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.85;
}

.card-slide:hover img {
    filter: grayscale(0%) brightness(1.1);
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .cooperate-title {
        font-size: 32px;
    }
    
    .cards-wrapper {
        gap: 20px;
    }
    
    .card-slide {
        flex: 0 0 calc(25% - 15px);
        min-height: 100px;
        padding: 15px;
        min-width: 160px;
        max-width: 200px;
    }
    
    .card-slide img {
        max-height: 60px;
    }
}

@media (max-width: 768px) {
    .cooperate-block {
        padding: 40px 0;
    }
    
    .cooperate-container {
        padding: 0 15px;
    }
    
    .cooperate-header {
        margin-bottom: 30px;
        padding: 20px 0;
    }
    
    .cooperate-title {
        font-size: 28px;
    }
    
    .cooperate-cards {
        padding: 30px 15px;
    }
    
    .cards-wrapper {
        gap: 15px;
    }
    
    .card-slide {
        flex: 0 0 calc(50% - 7.5px);
        min-height: 80px;
        padding: 10px;
        min-width: 150px;
        max-width: none;
    }
    
    .card-slide img {
        max-height: 50px;
    }
}

@media (max-width: 480px) {
    .cooperate-title {
        font-size: 24px;
        line-height: 1.4;
    }
    
    .cards-wrapper {
        flex-direction: column;
        gap: 15px;
    }
    
    .card-slide {
        flex: none;
        width: 100%;
        max-width: 280px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cooperate-header {
    animation: fadeInUp 0.8s ease-out;
}

.cooperate-cards {
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

/* 动画效果增强 */
.cooperate-block {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.cooperate-block.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* 悬停效果增强 */
.card-slide.dimmed {
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.card-slide img.loaded {
    opacity: 1;
}

.card-slide img.error {
    opacity: 0.3;
    filter: grayscale(100%);
}


/* 性能优化 - 启用硬件加速 */
.card-slide {
    will-change: transform, box-shadow;
    backface-visibility: hidden;
    perspective: 1000px;
}

/* 减少动画时的重绘 */
.card-slide:hover,
.card-slide:focus {
    will-change: auto;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 移动端布局调整 */
.cards-wrapper.mobile-layout {
    flex-direction: column;
    align-items: center;
}

.cards-wrapper.mobile-layout .card-slide {
    min-width: 150px;
    margin-bottom: 15px;
}

/* 打印样式 */
@media print {
    .cooperate-block {
        padding: 20px 0;
        background: white;
    }
    
    .card-slide {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .card-slide img {
        filter: none;
    }
}