body {
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f5f7fa;
  color: #333;
  line-height: 1.6;
}

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

header {
  background: linear-gradient(135deg, #1e88e5, #1565c0);
  color: white;
  padding: 40px 0;
  margin-bottom: 30px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  position: relative;
}

.language-toggle {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.4);
  padding: 8px 16px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s ease;
}

.language-toggle:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

h1 {
  text-align: center;
  margin: 0;
  font-size: 2.5em;
  font-weight: 600;
}

.subtitle {
  text-align: center;
  margin: 10px 0 0;
  font-size: 1.2em;
  opacity: 0.9;
}

.description {
  background: white;
  padding: 25px;
  margin: 20px auto;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  max-width: 900px;
}

.description h2 {
  color: #1565c0;
  margin-top: 0;
  font-size: 1.5em;
}

.description p {
  margin: 15px 0;
  color: #555;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.feature-card {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.feature-card h3 {
  color: #1565c0;
  margin-top: 0;
}

#table-container {
  margin: 20px auto;
  padding: 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tabulator {
  font-size: 14px;
}

.tabulator-header {
  background-color: #f8f9fa;
}

.tabulator-row {
  border-bottom: 1px solid #eee;
}

.tabulator-row.tabulator-row-even {
  background-color: #f8f9fa;
}

.tabulator-row.tabulator-row-odd {
  background-color: white;
}

footer {
  text-align: center;
  padding: 20px;
  margin-top: 40px;
  color: #666;
  font-size: 0.9em;
}

@media (max-width: 768px) {
  .container {
    padding: 10px;
  }
  
  header {
    padding: 20px 0;
  }

  h1 {
    font-size: 2em;
  }

  .description {
    padding: 15px;
  }

  .language-toggle {
    top: 10px;
    right: 10px;
    padding: 6px 12px;
    font-size: 12px;
  }
}