.x31-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
    color: #1e2a3a;
    padding: 10px 0;
  }
  .x31-title {
    font-size: 32px;
    font-weight: 600;
    color: #0b3b5c;
    border-bottom: 4px solid #2a7faa;
    padding-bottom: 12px;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
  }
  .x31-overview {
    background: #f4f8fc;
    padding: 22px 28px;
    border-radius: 12px;
    line-height: 1.7;
    font-size: 16px;
    margin-bottom: 36px;
    border-left: 6px solid #2a7faa;
    box-shadow: 0 2px 6px rgba(0,0,0,0.04);
  }
  .x31-section-title {
    font-size: 24px;
    font-weight: 500;
    color: #0b3b5c;
    margin: 32px 0 18px 0;
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .x31-section-title::after {
    content: '';
    flex: 1;
    height: 2px;
    background: linear-gradient(to right, #c0d9e8, transparent);
  }
  .x31-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 22px;
    margin-bottom: 10px;
  }
  .x31-card {
    background: #ffffff;
    border-radius: 14px;
    box-shadow: 0 4px 14px rgba(0, 20, 40, 0.08);
    padding: 20px 18px 16px;
    border-top: 5px solid #2a7faa;
    transition: transform 0.15s ease;
  }
  .x31-card:hover {
    transform: translateY(-3px);
  }
  .x31-card h3 {
    margin: 0 0 12px 0;
    font-size: 18px;
    font-weight: 600;
    color: #1a3b4f;
    border-bottom: 1px solid #edf2f7;
    padding-bottom: 10px;
  }
  .x31-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  .x31-card ul li {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    border-bottom: 1px dashed #e9edf2;
    font-size: 14px;
    line-height: 1.4;
  }
  .x31-card ul li:last-child {
    border-bottom: none;
  }
  .x31-label {
    font-weight: 600;
    color: #3d5a73;
    margin-right: 12px;
    flex-shrink: 0;
  }
  .x31-value {
    color: #0b3b5c;
    text-align: right;
    font-weight: 500;
  }
  .x31-card-di { border-top-color: #d97706; }
  .x31-card-do { border-top-color: #0b7e4a; }
  .x31-card-cert { border-top-color: #7c3aed; }
  .x31-card-power { border-top-color: #4b7f9e; }

  .x31-model {
    background: #edf4fa;
    border-radius: 14px;
    padding: 18px 20px 20px;
    margin-top: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  }
  .x31-model table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
  }
  .x31-model th {
    background: #1e3a4f;
    color: white;
    padding: 10px 12px;
    text-align: left;
    font-weight: 500;
  }
  .x31-model td {
    padding: 10px 12px;
    border-bottom: 1px solid #d4e0e9;
    background: #ffffff;
  }
  .x31-model tr:last-child td {
    border-bottom: none;
  }
  .x31-model .signal-type {
    font-size: 14px;
    line-height: 1.5;
  }
  @media (max-width: 600px) {
    .x31-grid { grid-template-columns: 1fr; }
    .x31-card ul li { flex-wrap: wrap; }
    .x31-value { text-align: left; margin-top: 2px; }
  }