/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* 数据面板样式 */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
    padding: 0 10px;
}

.stat-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9ff 100%);
    border-radius: 15px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.1);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.stat-card.highlighted {
    border: 2px solid #667eea;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.stat-card.highlighted::before {
    background: linear-gradient(90deg, #f093fb, #f5576c);
}

.stat-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.stat-content {
    flex: 1;
    text-align: left;
}

.stat-content h3 {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 8px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1e3c72;
    margin-bottom: 5px;
    line-height: 1.2;
}

.stat-change {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 12px;
    display: inline-block;
}

.stat-change.positive {
    color: #10b981;
    background: rgba(16, 185, 129, 0.1);
}

.stat-change.negative {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

/* 头部样式 */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    text-align: center;
}

header h1 {
    color: #1e3c72;
    font-size: 2.5rem;
    margin-bottom: 15px;
    font-weight: 700;
}

header .subtitle {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 25px;
}

.chart-types {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.chart-type-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.chart-type-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.chart-type-btn.active {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    box-shadow: 0 4px 15px rgba(245, 87, 108, 0.4);
}

/* 主要内容区域 */
main {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* 图表容器样式 */
.chart-container {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: none;
}

.chart-container.active {
    display: block;
    animation: fadeIn 0.6s ease;
}

.chart-container:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.chart-title {
    font-size: 1.5rem;
    color: #1e3c72;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.chart-title::before,
.chart-title::after {
    content: '⬤';
    color: #667eea;
    font-size: 0.8rem;
}

.chart {
    width: 100%;
    height: 400px;
    position: relative;
    margin: 0;
    padding: 0;
}

.chart > div {
    width: 100%;
    height: 100%;
    min-height: 400px;
}

.chart-description {
    margin-top: 20px;
    padding: 15px;
    background: linear-gradient(135deg, #f8f9ff 0%, #e8ecff 100%);
    border-radius: 8px;
    border-left: 4px solid #667eea;
    font-size: 0.95rem;
    color: #555;
    line-height: 1.7;
}

/* 数据选择器样式 */
.data-selector {
    margin-bottom: 25px;
    padding: 20px;
    background: linear-gradient(135deg, #f8f9ff 0%, #e8ecff 100%);
    border-radius: 10px;
}

.data-selector label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #1e3c72;
}

.data-selector select {
    width: 100%;
    padding: 12px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    background: white;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.data-selector select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-20px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 页脚样式 */
footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

footer p {
    color: #666;
    font-size: 0.95rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .dashboard-stats {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
        margin: 20px 0;
    }
    
    .stat-card {
        padding: 20px;
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .stat-content {
        text-align: center;
    }
    
    .stat-icon {
        font-size: 2rem;
        width: 50px;
        height: 50px;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .chart-types {
        gap: 10px;
    }
    
    .chart-type-btn {
        padding: 10px 18px;
        font-size: 0.9rem;
    }
    
    main {
        padding: 20px;
    }
    
    .chart-container {
        padding: 20px;
    }
    
    .chart {
        height: 300px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }
    
    .dashboard-stats {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .stat-card {
        padding: 15px;
        flex-direction: row;
        text-align: left;
        gap: 12px;
    }
    
    .stat-content {
        text-align: left;
    }
    
    .stat-icon {
        font-size: 1.8rem;
        width: 45px;
        height: 45px;
    }
    
    .stat-value {
        font-size: 1.3rem;
    }
    
    .chart-type-btn {
        padding: 8px 14px;
        font-size: 0.85rem;
    }
    
    main {
        padding: 15px;
    }
    
    .chart-container {
        padding: 15px;
    }
    
    .chart {
        height: 250px;
    }
}

/* 加载动画 */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
}

.loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 图表工具提示样式 */
.tooltip {
    position: absolute;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 10px;
    border-radius: 5px;
    font-size: 0.9rem;
    pointer-events: none;
    z-index: 1000;
    max-width: 200px;
}

/* 图表网格线样式 */
.grid-line {
    stroke: #e0e0e0;
    stroke-width: 1;
}

.axis-label {
    font-size: 12px;
    fill: #666;
}

/* 图表图例样式 */
.legend {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 15px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.legend-color {
    width: 20px;
    height: 3px;
    border-radius: 2px;
}