.article-content {
  max-width: 900px;
  margin: 0 auto !important;
  padding: 40px 20px;
  background: #fff;
  color: #333;
  font-family: "Helvetica Neue", sans-serif;
  line-height: 1.8;
}

.article-content h1 {
  font-size: 1.5rem;
  font-weight: bold;
  text-align: center;
}


.article-content h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
  padding-left: 10px;
  border-left: 4px solid #000;
  font-weight: bold;
}

.article-content h3 {
  font-size: 1.2rem;
  margin-top: 1.5rem;
  color: #555;
  font-weight: normal;
}

.article-content p {
  margin: 1em 0;
  font-size: 1rem;
}

.article-content .item {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #ddd;
}

.article-content img {
  display: block;
  width: 100%;
  height: auto;
  margin: 1rem 0;
}

.article-content .caption {
  font-size: 0.85rem;
  color: #777;
  text-align: center;
  margin-bottom: 1.5rem;
}

.article-content .feature-list {
  margin: 1rem 0 2rem 1.2rem;
  padding-left: 1em;
}

.article-content .feature-list li {
  margin-bottom: 0.5rem;
  list-style: disc;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-height: 500px;
  overflow: hidden;
  margin-bottom: 2rem;
}

.hero-image {
  width: 100%;
  height: auto;
  display: block;
}

.hero-text-overlay {
  position: absolute;
  top: 80%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: inline-block;
  white-space: nowrap; /* 改行を防ぐ */
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  padding: 20px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}




.hero-text-overlay p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
}