body {
    font-family: "Hiragino Kaku Gothic ProN", sans-serif;
    background-color: #f8fbff;
    margin: 0;
    padding: 0;
    color: #333;
  }
  
  .page-header {
    background-color: #0077cc;
    color: white;
    padding: 20px 0;
    text-align: center;
  }
  
  .page-header h1 {
    margin: 0;
    font-size: 1.8em;
  }
  
  .page-header p {
    margin: 5px 0 0;
    font-size: 1em;
  }
  
  .content {
    padding: 20px;
    max-width: 800px;
    margin: auto;
  }
  
  .section-box {
    background-color: #ffffff;
    border-left: 8px solid #4caf50;
    padding: 15px 20px;
    margin-bottom: 25px;
    border-radius: 8px;
  }
  
  .section-box.inorganic {
    border-left-color: #ff9800;
  }
  
  .section-box h2 {
    margin-top: 0;
  }
  
  .highlight {
    background-color: #ffffcc;
    padding: 2px 5px;
    border-radius: 4px;
  }
  
  .comparison {
    background-color: #e3f2fd;
    padding: 20px;
    border-radius: 10px;
  }
  
  .comparison table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
  }
  
  .comparison th,
  .comparison td {
    border: 1px solid #ccc;
    padding: 8px;
    text-align: center;
  }
  
  .comparison th {
    background-color: #bbdefb;
  }
  
  .footer {
    text-align: center;
    font-size: 0.9em;
    color: #666;
    padding: 20px 0;
  }

.tennsei-img {
  max-width: 80%;      
  height: auto;        
  display: block;      
  margin: 20px auto;   
  border: 1px solid #ccc;  
}