/* 现代简约广告位卡片样式 */
.ad-spots {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    padding: 20px;
}

.ad-spot {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
}

.ad-spot::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4caf50, #2196f3);
}

.ad-spot:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.ad-spot-content {
    padding: 30px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.ad-spot-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #f5f7fa, #ffffff);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.ad-spot-icon i {
    font-size: 24px;
    color: #1a237e;
    opacity: 0.9;
}

.ad-spot-title {
    font-size: 20px;
    font-weight: 600;
    color: #1a237e;
    margin: 0 0 10px 0;
}

.ad-spot-description {
    font-size: 14px;
    color: #666;
    margin: 0 0 20px 0;
    line-height: 1.6;
}

.ad-spot-features {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature-item i {
    color: #4caf50;
    font-size: 16px;
}

.feature-item span {
    font-size: 14px;
    color: #444;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .ad-spots {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .ad-spot-content {
        padding: 25px;
    }
    
    .ad-spot-title {
        font-size: 20px;
    }
}