/* =============================================
   CONCEPTページ専用スタイル（B3デザイン）
   ─ 明確な白枠版
   ============================================= */

.page-concept-preview {
  background: var(--color-cream);
  min-height: 100vh;
}

/* ページヘッダーは style.css の共通スタイル（.page-header）を使用 */

/* リード文 */
.page-concept-preview .concept-lead {
  text-align: center;
  padding: 0 20px 60px;
  max-width: 800px;
  margin: 0 auto;
}

.page-concept-preview .lead-main {
  font-family: var(--font-mincho);
  font-size: 22px;
  color: var(--color-brown);
  line-height: 2.2;
  margin-bottom: 25px;
}

.page-concept-preview .lead-sub {
  font-family: var(--font-mincho);
  font-size: 15px;
  color: #666;
  line-height: 2.2;
}

.page-concept-preview .scroll-indicator {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.page-concept-preview .scroll-indicator span {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--color-brown);
}

.page-concept-preview .scroll-indicator::after {
  content: '';
  width: 1px;
  height: 40px;
  background: var(--color-brown);
  animation: scrollDown 1.5s ease-in-out infinite;
}

@keyframes scrollDown {

  0%,
  100% {
    transform: scaleY(0);
    transform-origin: top;
  }

  50% {
    transform: scaleY(1);
    transform-origin: top;
  }

  51% {
    transform: scaleY(1);
    transform-origin: bottom;
  }

  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

/* コンテンツセクション */
.page-concept-preview .concept-section {
  position: relative;
  z-index: 1;
  min-height: auto;
  display: flex;
  align-items: stretch;
  background: var(--color-white);
  margin-bottom: 60px;
}

.page-concept-preview .concept-section.reverse {
  flex-direction: row-reverse;
}

.page-concept-preview .section-image {
  flex: 1.2;
  position: relative;
  overflow: hidden;
  min-height: 400px;
  max-height: none;
  /* コンテンツに合わせて高さを自動調整 */
}

.page-concept-preview .section-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-concept-preview .section-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 50px;
  background: var(--color-white);
  position: relative;
}

/* 画面幅が狭くなってきたら、意図的な改行を無効化して自然な折り返しに任せる */
@media (max-width: 1600px) {
  .page-concept-preview .section-desc br {
    display: none;
  }
}

.page-concept-preview .section-number {
  position: absolute;
  top: 40px;
  right: 40px;
  font-family: var(--font-mincho);
  font-size: 100px;
  color: var(--color-cream);
  font-weight: 600;
  line-height: 1;
}

.page-concept-preview .section-en {
  font-family: var(--font-mincho);
  font-size: 14px;
  color: var(--color-gold);
  letter-spacing: 0.2em;
  margin-bottom: 15px;
  font-style: italic;
}

.page-concept-preview .section-title {
  font-family: var(--font-base);
  font-size: 28px;
  color: var(--color-brown);
  font-weight: 500;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(127, 63, 32, 0.2);
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.page-concept-preview .section-desc {
  font-family: var(--font-mincho);
  font-size: 16px;
  line-height: 2.4;
  color: var(--color-gray-dark);
  position: relative;
  z-index: 1;
}

.page-concept-preview .section-note {
  font-family: var(--font-mincho);
  font-size: 14px;
  color: var(--color-gray-soft);
  margin-top: 25px;
  position: relative;
  z-index: 1;
}

/* 金賞ロゴ */
.page-concept-preview .award-logo {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 100px;
  z-index: 10;
  filter: drop-shadow(0 5px 15px rgba(0, 0, 0, 0.2));
}

.page-concept-preview .award-logo img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

/* 2分割画像 */
.page-concept-preview .section-image-split {
  display: flex;
  align-items: stretch;
  /* gap, background はインラインスタイルで設定 */
}

.page-concept-preview .section-image-split .split-left,
.page-concept-preview .section-image-split .split-right {
  overflow: hidden;
  position: relative;
}

.page-concept-preview .section-image-split .split-left img,
.page-concept-preview .section-image-split .split-right img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* フッター */
.page-concept-preview .concept-footer {
  background: var(--color-cream);
  text-align: center;
  padding: 100px 20px;
  position: relative;
}

.page-concept-preview .footer-message {
  font-family: var(--font-mincho);
  font-size: 18px;
  color: var(--color-brown);
  margin-bottom: 40px;
  line-height: 2;
}

/* レスポンシブ */
@media (max-width: 1024px) {
  .page-concept-preview .concept-section {
    flex-direction: column !important;
    min-height: auto;
    margin-bottom: 40px;
  }

  .page-concept-preview .section-image {
    flex: none;
    height: auto;
    /* 高さをコンテンツに合わせる */
    min-height: 400px;
    /* 最低の高さは維持 */
  }

  .page-concept-preview .section-image img {
    min-height: 0;
    /* 画像自体の制限は解除 */
    height: 100%;
  }

  .page-concept-preview .section-content {
    padding: 60px 30px;
  }

  .page-concept-preview .section-number {
    font-size: 80px;
    top: 30px;
    right: 30px;
  }

  .page-concept-preview .lead-main {
    font-size: 18px;
  }

  .page-concept-preview .section-title {
    font-size: 22px;
  }

  /* モバイルでの金賞ロゴ調整 */
  .page-concept-preview .award-logo {
    position: absolute !important;
    top: 15px !important;
    right: 15px !important;
    width: 100px !important;
    margin: 0 !important;
    transform: none !important;
    left: auto !important;
    bottom: auto !important;
  }
}