.col-container {
  max-width: 760px;
  margin: 0 auto;
}

.col-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background-color: #fff;
  padding: 20px;
  margin-bottom: 30px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.col-image {
  flex: 0 0 45%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border: 1px solid #ccc;
  border-radius: 8px;
}

.col-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.col-info {
  flex: 1;
}

.col-info h2 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.col-info p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 8px;
}

.col-usage {
  font-weight: bold;
  color: #333;
  margin-top: 10px;
  margin-bottom: 10px;
}

.col-link-button {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid #555;
  border-radius: 6px;
  text-decoration: none;
  color: #333;
  background-color: #f7f7f7;
  transition: background-color 0.2s;
}

.col-link-button:hover {
  background-color: #e0e0e0;
}

/* --- レスポンシブ対応（スマホ） --- */
@media (max-width: 600px) {
  .col-item {
    flex-direction: column;
    align-items: center;
  }

  .col-image {
    width: 100%;
    max-width: 400px;
  }

  .col-info {
    width: 100%;
    text-align: center;
  }

  .col-link-button {
    margin-top: 10px;
  }
}