/* KPI卡片样式增强 */
.kpi-card {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.kpi-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04) !important;
}

.kpi-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

/* 数字动画效果 */
.kpi-value {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 趋势指示器动画 */
.trend-indicator {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* 迷你图表容器 */
.mini-chart-container {
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.kpi-card:hover .mini-chart-container {
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .kpi-card {
        margin-bottom: 1rem;
    }
}

/* 加载动画 */
.kpi-loading {
    position: relative;
    min-height: 200px;
}

.kpi-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}