* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Microsoft YaHei', Arial, sans-serif;
  background: linear-gradient(135deg, #81C784 0%, #66BB6A 100%);
  padding: 20px;
  min-height: 100vh;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

h1 {
  text-align: center;
  color: #333;
  margin-bottom: 30px;
  font-size: 32px;
  font-weight: 600;
}

.filter-section {
  background: #f8f9fa;
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
}

.filter-section label {
  font-weight: 600;
  color: #555;
  font-size: 14px;
}

.filter-section input {
  padding: 10px 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.3s;
}

.filter-section input:focus {
  border-color: #66BB6A;
}

.filter-section button {
  padding: 10px 25px;
  background: linear-gradient(135deg, #66BB6A 0%, #43A047 100%);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}

.filter-section button:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 187, 106, 0.4);
}

.stats-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: linear-gradient(135deg, #66BB6A 0%, #43A047 100%);
  color: white;
  padding: 20px;
  border-radius: 12px;
  text-align: center;
}

.stat-card h3 {
  font-size: 14px;
  margin-bottom: 10px;
  opacity: 0.9;
}

.stat-card .value {
  font-size: 28px;
  font-weight: 700;
}

.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 25px;
  margin-bottom: 25px;
}

.chart-container {
  background: #f8f9fa;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.chart-container.full-width {
  grid-column: 1 / -1;
}

.chart-container h2 {
  font-size: 18px;
  color: #333;
  margin-bottom: 15px;
  font-weight: 600;
}

.chart {
  width: 100%;
  height: 400px;
}

.footer {
  text-align: center;
  padding: 20px 0;
  color: white;
  font-size: 14px;
}

.chart.full-height {
  height: 500px;
}

@media (max-width: 1024px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 20px;
  }
  
  h1 {
    font-size: 24px;
  }
  
  .filter-section {
    flex-direction: column;
    align-items: stretch;
  }
  
  .filter-section input,
  .filter-section button {
    width: 100%;
  }
  
  .stats-summary {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .chart {
    height: 300px;
  }
}