header.hero.hero--teaser {
  background-image: url('/assets/img/teaser_world.jpg');
  background-position: center 45%;
  background-size: cover;
  background-repeat: no-repeat;
}

.hero--teaser::before {
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.55));
}

/* イントロダクション */
.intro-section {
  padding: clamp(60px, 8vw, 100px) 0;
  text-align: center;
}

.intro-text {
  font-size: clamp(1.1rem, 2.2vw, 1.5rem);
  line-height: 2;
  letter-spacing: 0.1em;
  color: rgba(243, 246, 251, 0.75);
  font-weight: 300;
  margin: 0 auto;
  max-width: 700px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  opacity: 0.88;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.echo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2.5vw, 24px);
  margin-top: 24px;
}

.echo-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.echo-card h3 {
  margin: 0;
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  letter-spacing: 0.08em;
  color: var(--ink);
}

.echo-card p {
  margin: 0;
  color: var(--muted);
}

.teaser-list {
  margin: 0;
  padding-left: 1.2em;
  color: var(--muted);
}

.teaser-list li + li {
  margin-top: 10px;
}

.cta-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 22px;
}

@media (max-width: 900px) {
  .echo-grid {
    grid-template-columns: 1fr;
  }
}

/* ジャンルタグ */
.genre-tag {
  display: inline-block;
  font-size: 0.9rem;
  color: var(--accent, #f9a825);
  font-weight: 600;
  margin-bottom: 1rem;
  padding: 0.25rem 0.75rem;
  background: rgba(249, 168, 37, 0.1);
  border-radius: 4px;
}

/* CTA強化 */
.cta-primary {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  min-width: 280px;
}

.cta-label {
  font-size: 1.1rem;
  font-weight: 700;
}

.cta-sublabel {
  font-size: 0.85rem;
  opacity: 0.8;
}

.cta-primary-large {
  font-size: 1.2rem;
  padding: 1rem 2.5rem;
  min-width: 320px;
}

.secondary-links {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.text-link {
  color: var(--muted, #aaa);
  text-decoration: none;
  font-size: 0.9rem;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.text-link:hover {
  border-bottom-color: currentColor;
}

/* 特徴グリッド */
.features-highlight {
  background: rgba(255, 255, 255, 0.02);
}

.section-lead {
  text-align: center;
  color: var(--muted, #aaa);
  margin-bottom: 2rem;
  font-size: 1rem;
  line-height: 1.6;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.feature-card {
  text-align: center;
  padding: 2rem 1.5rem;
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--accent, #f9a825);
}

.feature-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--muted, #ccc);
}

.feature-desc strong {
  color: var(--ink, #fff);
  font-weight: 600;
}

/* スペックリスト */
.spec-list {
  display: grid;
  gap: 1rem;
}

.spec-list dt {
  font-weight: 700;
  color: var(--accent, #f9a825);
  margin-bottom: 0.25rem;
}

.spec-list dd {
  margin: 0 0 1rem 0;
  padding-left: 1rem;
  border-left: 2px solid rgba(249, 168, 37, 0.3);
  color: var(--muted, #ccc);
  line-height: 1.6;
}

/* FAQ */
.faq-item {
  margin-bottom: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  overflow: hidden;
}

.faq-item summary {
  padding: 1rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.02);
  transition: background 0.2s;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::before {
  content: '▶ ';
  display: inline-block;
  margin-right: 0.5rem;
  transition: transform 0.2s;
}

.faq-item[open] summary::before {
  transform: rotate(90deg);
}

.faq-item summary:hover {
  background: rgba(255, 255, 255, 0.05);
}

.faq-item p {
  padding: 1rem 1.5rem;
  margin: 0;
  line-height: 1.7;
  color: var(--muted, #ccc);
}

/* モバイル対応 */
@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

  .cta-primary,
  .cta-primary-large {
    min-width: 100%;
  }

  .secondary-links {
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }

  .genre-tag {
    font-size: 0.8rem;
  }

  .feature-icon {
    font-size: 2.5rem;
  }

  .screenshot-img {
    width: min(100%, 360px);
    margin: 0 auto;
  }
}

/* 画像拡大モーダル */
.image-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.image-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.image-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(4px);
}

.image-modal-content {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-modal-img {
  max-width: 100%;
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
}

.image-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  width: 40px;
  height: 40px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.2s;
}

.image-modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.image-modal-close:active {
  transform: scale(0.95);
}

.screenshot-img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.2s, opacity 0.2s;
}

.screenshot-img:hover {
  transform: scale(1.02);
  opacity: 0.9;
}

@media (max-width: 768px) {
  .image-modal-close {
    top: -50px;
    width: 36px;
    height: 36px;
    font-size: 24px;
  }

  .image-modal-content {
    max-width: 95vw;
    padding: 0 10px;
  }
}