.accordion-container {
  max-width: 700px;
  margin: 30px auto;
  font-family: sans-serif;
}

.accordion-button {
  background: #34495e;
  color: #fff;
  padding: 12px 16px;
  border: none;
  width: 100%;
  text-align: left;
  cursor: pointer;
  font-size: 16px;
  outline: none;
  transition: background 0.3s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.accordion-button:hover {
  background: #2c3e50;
}

.accordion-content {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.5s ease;
  background: #ecf0f1;
  padding: 0 16px;
  box-sizing: border-box;
}

.accordion-content.open {
  max-height: none;
  padding: 10px 16px;
}

.accordion-item {
  margin: 4px 0;
}

.accordion-item .accordion-item {
  margin-left: 20px;
}

.icon {
  font-weight: bold;
  display: inline-block;
  width: 16px;
}

@media screen and (max-width: 600px) {
  .accordion-container {
    padding: 0 10px;
  }

  .accordion-button {
    font-size: 14px;
    padding: 10px 12px;
  }

  .accordion-content {
    padding: 0 12px;
  }

  .accordion-content.open {
    padding: 8px 12px;
  }
}
.icon-layout {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  gap: 16px;
  flex-wrap: wrap;
}

.icon-box {
  text-align: center;
  font-size: 12px;
}

.icon-box img {
  display: block;
  margin: 0 auto 6px;
}

.icon-arrow {
  font-size: 20px;
  font-weight: bold;
}

.desc-box {
  font-size: 13px;
  line-height: 1.6;
}

.desc-box ul {
  padding-left: 20px;
  margin: 6px 0;
}

.desc-box li {
  list-style-type: disc;
}

.example {
  font-size: 12px;
  color: #555;
  margin-top: 6px;
}
.contact-gradient-box {
  background: linear-gradient(145deg, #003366, #006699);
  color: #fff;
  padding: 40px 20px;
  text-align: center;
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  margin-top: 40px;
}

.contact-gradient-content h3 {
  font-size: 1.6rem;
  margin-bottom: 20px;
  font-weight: bold;
}

.cta-list {
  list-style: none;
  padding: 0;
  margin-bottom: 20px;
}

.cta-list li {
  margin: 10px 0;
  padding: 10px 15px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  display: inline-block;
  text-align: left;
  max-width: 400px;
}

.cta-list li i {
  color: #00e5ff;
  margin-right: 8px;
}

.cta-message {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 24px;
}

.cta-button {
  display: inline-block;
  background: #ffcc00;
  color: #003366;
  font-weight: bold;
  padding: 12px 30px;
  border-radius: 40px;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.cta-button:hover {
  background: #ffe066;
  transform: scale(1.05);
}
.cta-icon-only {
  display: inline-block;
  background: #ffcc00;
  color: #003366;
  padding: 16px;
  border-radius: 50%;
  text-align: center;
  transition: background 0.3s ease, transform 0.3s ease;
}

.cta-icon-only:hover {
  background: #ffe066;
  transform: scale(1.1);
}

.cta-icon-only i {
  font-size: 1.4rem;
}
.system-cards {
  padding: 1em;
}
.cards-container {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.system-card {
  flex: 1 1 320px;
  border: 1px solid #ddd;
  border-radius: 10px;
  padding: 16px;
  background: #f9f9f9;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.system-card h3 {
  font-size: 1.1em;
  margin: 0 0 0.5em;
}
.badge {
  display: inline-block;
  background: #007bce;
  color: #fff;
  border-radius: 50%;
  width: 1.8em;
  height: 1.8em;
  text-align: center;
  line-height: 1.8em;
  font-weight: bold;
  margin-right: 0.3em;
}
.summary {
  font-size: 0.95em;
  color: #333;
}
.toggle-button {
  margin-top: 8px;
  background: #007bce;
  color: #fff;
  border: none;
  padding: 6px 12px;
  border-radius: 5px;
  cursor: pointer;
}
.card-detail {
  display: none;
  margin-top: 10px;
  font-size: 0.95em;
  color: #444;
}
.section-lead {
  font-size: 0.95em;
  color: #666;
  margin-bottom: 0.3em;
}
h2 .highlight {
  background: linear-gradient(to right, #007bce, #00c6ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: bold;
}
/* h2タイトル装飾 */
.accordion-container h2 {
  font-size: 1.3rem;
  padding: 12px 0;
  border-left: 6px solid #007bce;
  padding-left: 12px;
  margin-bottom: 16px;
  background: #eef6fc;
  color: #003366;
}

/* アコーディオンカード風 */
.accordion-item {
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  margin-bottom: 16px;
  overflow: hidden;
}

/* セクション間の背景トーン違い */
.accordion-container:nth-of-type(even) {
  background-color: #f9f9f9;
  padding: 20px 16px;
  border-radius: 12px;
}

/* 装置説明の段落 */
.accordion-content p {
  margin-bottom: 1em;
  color: #333;
}

/* 箇条書き調整 */
.accordion-content ul,
.accordion-content ol {
  padding-left: 1.2em;
  margin-bottom: 1em;
}

.accordion-content li {
  margin-bottom: 0.5em;
  line-height: 1.6;
}

/* アコーディオンアイコン強調 */
.accordion-button .icon {
  font-size: 1.4rem;
  color: #ffcc00;
}
<style>
#image-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  justify-content: center;
  align-items: center;
  background: rgba(0,0,0,0.7);
  z-index: 9999;
}
#image-modal img {
  max-width: 90%;
  max-height: 90%;
  box-shadow: 0 0 20px #fff;
}
#image-modal:target {
  display: flex;
}
</style>
.system-step-container {
  counter-reset: step-counter;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
  padding: 0;
  margin: 40px 0;
}

.system-step {
  counter-increment: step-counter;
  position: relative;
  flex: 1 1 280px;
  max-width: 320px;
}

.system-step::before {
  content: "STEP " counter(step-counter);
  position: absolute;
  top: -14px;
  left: 0;
  font-weight: bold;
  color: #007bce;
  background: #eef6fc;
  padding: 4px 10px;
  border-radius: 0 8px 8px 0;
  font-size: 0.85em;
}