/* ============================================
   Acqua Blog Post Styles — Premium Edition
   ============================================
   AIが標準HTMLタグ(<h2>,<p>,<ul>,<table>等)だけで出力すれば
   自動的にスタイリングされる設計。クラス名の指定は不要。
   ============================================ */

/* ------------------------------------
   アニメーション定義
   ------------------------------------ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 8px rgba(46, 124, 246, 0.15); }
  50% { box-shadow: 0 0 20px rgba(46, 124, 246, 0.3); }
}

@keyframes numberPop {
  0% { transform: scale(0.5); opacity: 0; }
  60% { transform: scale(1.15); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes borderDraw {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ------------------------------------
   記事ヘッダー
   ------------------------------------ */
.post__header {
  margin-bottom: var(--space-2xl);
  animation: fadeInUp 0.7s ease-out;
}

.post__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.post__date {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-family: var(--font-family-en);
  letter-spacing: 0.05em;
}

.post__cat {
  font-size: var(--font-size-xs);
  padding: 0.25rem 0.875rem;
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.08), rgba(0, 212, 170, 0.08));
  border: 1px solid rgba(46, 124, 246, 0.15);
  border-radius: var(--radius-full);
  color: var(--color-accent-start);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  transition: all var(--transition-base);
  letter-spacing: 0.02em;
}

.post__cat:hover {
  background: var(--color-accent-gradient);
  border-color: transparent;
  color: var(--color-text-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(46, 124, 246, 0.25);
}

.post__title {
  font-size: clamp(1.625rem, 4.5vw, 2.5rem);
  line-height: 1.25;
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ------------------------------------
   アイキャッチ画像
   ------------------------------------ */
.post__hero {
  margin-bottom: var(--space-2xl);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.8s ease-out 0.1s both;
  position: relative;
}

.post__hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 30%;
  background: linear-gradient(to top, rgba(0,0,0,0.08), transparent);
  pointer-events: none;
}

.post__hero img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-slow);
}

.post__hero:hover img {
  transform: scale(1.02);
}

/* ------------------------------------
   記事本文（.post__content）
   AIは標準HTMLタグを出力するだけでOK
   ------------------------------------ */
.post__content {
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-primary);
  letter-spacing: var(--letter-spacing-base);
  word-break: break-word;
  overflow-wrap: break-word;
  animation: fadeIn 0.6s ease-out 0.2s both;
}

/* === 見出し h2 === */
.post__content h2 {
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: var(--font-weight-bold);
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.05), rgba(0, 212, 170, 0.03));
  border-left: 4px solid;
  border-image: var(--color-accent-gradient) 1;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  line-height: var(--line-height-tight);
  position: relative;
  animation: slideInLeft 0.5s ease-out both;
}

.post__content h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--color-accent-gradient);
  animation: borderDraw 0.8s ease-out 0.3s both;
}

/* === 見出し h3 === */
.post__content h3 {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: var(--font-weight-semibold);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  color: var(--color-primary);
  padding-left: var(--space-md);
  border-left: 3px solid var(--color-accent-end);
  position: relative;
  transition: padding-left var(--transition-fast);
}

.post__content h3:hover {
  padding-left: calc(var(--space-md) + 4px);
}

/* === 見出し h4 === */
.post__content h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.post__content h4::before {
  content: '▸';
  color: var(--color-accent-start);
  font-size: 0.8em;
}

/* === 段落 === */
.post__content p {
  margin-bottom: var(--space-lg);
}

/* === 強調テキスト === */
.post__content strong {
  font-weight: var(--font-weight-bold);
  background: linear-gradient(transparent 60%, rgba(46, 124, 246, 0.12) 60%);
  padding: 0 2px;
}

.post__content em {
  font-style: italic;
  color: var(--color-primary);
}

/* === マーカー付きテキスト <mark> === */
.post__content mark {
  background: linear-gradient(transparent 50%, rgba(255, 179, 71, 0.3) 50%);
  padding: 0 4px;
  border-radius: 2px;
}

/* ------------------------------------
   リスト（ul / ol）
   ------------------------------------ */
.post__content ul,
.post__content ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-lg);
}

/* --- 箇条書き ul --- */
.post__content ul {
  list-style: none;
}

.post__content ul > li {
  position: relative;
  padding-left: 1.5em;
  margin-bottom: var(--space-sm);
  line-height: var(--line-height-base);
  transition: transform var(--transition-fast);
}

.post__content ul > li:hover {
  transform: translateX(4px);
}

.post__content ul > li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent-gradient);
  box-shadow: 0 0 6px rgba(46, 124, 246, 0.2);
  transition: transform var(--transition-fast);
}

.post__content ul > li:hover::before {
  transform: scale(1.3);
}

/* --- 番号付き ol --- */
.post__content ol {
  list-style: none;
  counter-reset: ol-counter;
}

.post__content ol > li {
  position: relative;
  padding-left: 2.5em;
  margin-bottom: var(--space-md);
  counter-increment: ol-counter;
  line-height: var(--line-height-base);
  transition: transform var(--transition-fast);
}

.post__content ol > li:hover {
  transform: translateX(4px);
}

.post__content ol > li::before {
  content: counter(ol-counter);
  position: absolute;
  left: 0;
  top: 0.1em;
  width: 1.75em;
  height: 1.75em;
  border-radius: 50%;
  background: var(--color-accent-gradient);
  color: var(--color-text-white);
  font-size: 0.8em;
  font-weight: var(--font-weight-bold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-en);
  box-shadow: 0 3px 8px rgba(46, 124, 246, 0.2);
  transition: all var(--transition-fast);
}

.post__content ol > li:hover::before {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 4px 12px rgba(46, 124, 246, 0.35);
}

/* ネストリスト */
.post__content ul ul,
.post__content ol ul,
.post__content ul ol,
.post__content ol ol {
  margin-top: var(--space-sm);
  margin-bottom: 0;
}

/* ------------------------------------
   引用 blockquote
   ------------------------------------ */
.post__content blockquote {
  border-left: 4px solid;
  border-image: var(--color-accent-gradient) 1;
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.04), rgba(0, 212, 170, 0.02));
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  position: relative;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.post__content blockquote:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.post__content blockquote::before {
  content: '\201C';
  position: absolute;
  top: -0.5rem;
  left: 0.75rem;
  font-size: 4rem;
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.3;
  font-family: Georgia, 'Times New Roman', serif;
  line-height: 1;
}

.post__content blockquote p:last-child {
  margin-bottom: 0;
}

.post__content blockquote cite {
  display: block;
  margin-top: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-style: normal;
  text-align: right;
}

.post__content blockquote cite::before {
  content: '— ';
}

/* ------------------------------------
   テーブル
   ------------------------------------ */
.post__content table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: var(--space-xl) 0;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.post__content thead th {
  background: var(--color-primary);
  color: var(--color-text-white);
  font-weight: var(--font-weight-semibold);
  padding: 0.875rem 1.25rem;
  text-align: left;
  white-space: nowrap;
  letter-spacing: 0.02em;
  position: relative;
}

.post__content thead th::after {
  content: '';
  position: absolute;
  right: 0;
  top: 25%;
  height: 50%;
  width: 1px;
  background: rgba(255, 255, 255, 0.15);
}

.post__content thead th:last-child::after {
  display: none;
}

.post__content td {
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: top;
  transition: background var(--transition-fast);
}

.post__content tbody tr {
  transition: all var(--transition-fast);
}

.post__content tbody tr:nth-child(even) {
  background: rgba(240, 242, 245, 0.5);
}

.post__content tbody tr:hover {
  background: rgba(46, 124, 246, 0.06);
  transform: scale(1.005);
}

.post__content tbody tr:last-child td {
  border-bottom: none;
}

/* テーブル横スクロール対応 */
.post__content .table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--space-xl) 0;
  border-radius: var(--radius-lg);
}

.post__content .table-wrapper table {
  margin: 0;
}

/* ------------------------------------
   画像 / figure
   ------------------------------------ */
.post__content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin: var(--space-xl) 0;
  box-shadow: var(--shadow-md);
  display: block;
  transition: all var(--transition-base);
}

.post__content img:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.post__content figure {
  margin: var(--space-2xl) 0;
  text-align: center;
}

.post__content figure img {
  margin: 0 auto;
}

.post__content figcaption {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  font-style: italic;
  letter-spacing: 0.02em;
}

/* --- h2セクション用インフォグラフィック --- */
.post__content .article-infographic {
  margin: var(--space-lg) 0 var(--space-2xl);
  text-align: center;
  animation: fadeInUp 0.6s ease-out;
}

.post__content .article-infographic img {
  max-width: 600px;
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  margin: 0 auto;
  transition: all var(--transition-base);
  border: 1px solid var(--color-border-light);
}

.post__content .article-infographic img:hover {
  box-shadow: 0 16px 48px rgba(46, 124, 246, 0.15);
  transform: translateY(-6px) scale(1.01);
  border-color: rgba(46, 124, 246, 0.2);
}

/* --- HTML図解コンポーネント --- */
.post__content .infographic-compare {
  background: var(--color-bg-white);
  border-radius: var(--radius-2xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(46, 124, 246, 0.08);
  position: relative;
  overflow: hidden;
  margin: var(--space-xl) 0 var(--space-2xl);
}
.post__content .infographic-compare::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--color-accent-gradient);
}
.post__content .infographic-compare__title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  border-left: none;
  padding-left: 0;
}
.post__content .infographic-compare__subtitle {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}
.post__content .infographic-compare__grid {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  gap: 0;
  align-items: start;
}
.post__content .compare-card {
  border-radius: var(--radius-xl);
  padding: 1.75rem;
}
.post__content .compare-card--left {
  background: linear-gradient(135deg, #f8f9fb, #eef1f6);
  border: 1px solid #e0e4ea;
}
.post__content .compare-card--right {
  background: linear-gradient(135deg, #f0f7ff, #e8f4fd);
  border: 1px solid rgba(46, 124, 246, 0.15);
}
.post__content .compare-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  color: var(--color-text-white);
}
.post__content .compare-card--left .compare-card__badge {
  background: #6b7280;
}
.post__content .compare-card--right .compare-card__badge {
  background: var(--color-accent-gradient);
}
.post__content .compare-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1rem;
}
.post__content .compare-card__icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin: 0;
  box-shadow: none;
}
.post__content .compare-card__icon img:hover {
  transform: none;
  box-shadow: none;
}
.post__content .compare-card__heading {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text-primary);
  border-left: none;
  padding-left: 0;
}
.post__content .compare-card__list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.post__content .compare-card__list li {
  padding: 0.5rem 0 0.5rem 1.5rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
  border-bottom: 1px solid rgba(0,0,0,0.04);
  position: relative;
}
.post__content .compare-card__list li:last-child {
  border-bottom: none;
}
.post__content .compare-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.post__content .compare-card--left .compare-card__list li::before {
  background: #9ca3af;
}
.post__content .compare-card--right .compare-card__list li::before {
  background: var(--color-accent-gradient);
  box-shadow: 0 0 6px rgba(46, 124, 246, 0.3);
}
.post__content .compare-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: 4rem;
}
.post__content .compare-arrow__line {
  width: 3px;
  height: 40px;
  background: linear-gradient(180deg, transparent, var(--color-accent-start));
  border-radius: 4px;
}
.post__content .compare-arrow__icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-white);
  font-size: 1.2rem;
  box-shadow: 0 4px 16px rgba(46, 124, 246, 0.3);
  animation: pulseGlow 2s ease-in-out infinite;
}
.post__content .compare-arrow__label {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--color-accent-start);
  letter-spacing: 0.08em;
  margin-top: 0.5rem;
  writing-mode: vertical-rl;
}
.post__content .infographic-compare__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(0,0,0,0.06);
}
.post__content .stat-card {
  text-align: center;
  padding: 1rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.03), rgba(0, 212, 170, 0.03));
  border: 1px solid rgba(46, 124, 246, 0.06);
  transition: all var(--transition-base);
}
.post__content .stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(46, 124, 246, 0.1);
}
.post__content .stat-card__number {
  font-family: var(--font-family-en);
  font-size: 1.75rem;
  font-weight: 900;
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}
.post__content .stat-card__label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: 0.25rem;
  font-weight: 500;
}
@media (max-width: 640px) {
  .post__content .infographic-compare { padding: 1.5rem; }
  .post__content .infographic-compare__grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .post__content .compare-arrow {
    flex-direction: row;
    padding: 0;
    gap: 0.5rem;
  }
  .post__content .compare-arrow__line {
    width: 40px; height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-accent-start));
  }
  .post__content .compare-arrow__label { writing-mode: horizontal-tb; }
  .post__content .infographic-compare__stats {
    grid-template-columns: 1fr;
  }
}

/* ------------------------------------
   リンク
   ------------------------------------ */
.post__content a {
  color: var(--color-accent-start);
  text-decoration: none;
  background-image: linear-gradient(var(--color-accent-start), var(--color-accent-start));
  background-size: 0% 2px;
  background-position: 0 100%;
  background-repeat: no-repeat;
  transition: all var(--transition-base);
  padding-bottom: 1px;
}

.post__content a:hover {
  background-size: 100% 2px;
  color: var(--color-accent-end);
}

/* ------------------------------------
   コードブロック
   ------------------------------------ */
.post__content code {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', 'Courier New', monospace;
  font-size: 0.85em;
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.06), rgba(0, 212, 170, 0.04));
  border: 1px solid rgba(46, 124, 246, 0.1);
  padding: 0.2em 0.5em;
  border-radius: var(--radius-sm);
  color: var(--color-accent-start);
  font-weight: var(--font-weight-medium);
}

.post__content pre {
  background: var(--color-bg-dark);
  color: #e6edf3;
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: var(--space-xl) 0;
  font-size: var(--font-size-sm);
  line-height: 1.7;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.05);
  position: relative;
}

.post__content pre::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 16px;
  display: flex;
  gap: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ff5f57;
  box-shadow: 20px 0 0 #ffbd2e, 40px 0 0 #28c840;
}

.post__content pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
  font-weight: inherit;
}

/* ------------------------------------
   区切り線 hr
   ------------------------------------ */
.post__content hr {
  border: none;
  height: 3px;
  background: var(--color-accent-gradient);
  margin: var(--space-3xl) auto;
  max-width: 100px;
  border-radius: var(--radius-full);
  opacity: 0.4;
}

/* ============================================
   オプショナル装飾クラス
   （AIが必要に応じて出力）
   ============================================ */

/* --- 強調ボックス --- */
.post__content .highlight-box {
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.06), rgba(0, 212, 170, 0.06));
  border: 1px solid rgba(46, 124, 246, 0.12);
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-2xl);
  margin: var(--space-xl) 0;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.post__content .highlight-box:hover {
  border-color: rgba(46, 124, 246, 0.25);
  box-shadow: 0 8px 32px rgba(46, 124, 246, 0.08);
  transform: translateY(-2px);
}

.post__content .highlight-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent-gradient);
}

/* --- ポイントまとめ --- */
.post__content .point-box {
  background: var(--color-bg-white);
  border: 2px solid transparent;
  background-clip: padding-box;
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-2xl);
  margin: var(--space-2xl) 0;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
}

.post__content .point-box:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.post__content .point-box::before {
  content: '💡 ポイント';
  display: block;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-base);
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border-light);
}

/* --- 注意ボックス --- */
.post__content .warning-box {
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.04), rgba(255, 179, 71, 0.04));
  border: 1px solid rgba(255, 107, 107, 0.15);
  border-left: 4px solid var(--color-danger);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: var(--space-xl) var(--space-2xl);
  margin: var(--space-xl) 0;
}

.post__content .warning-box::before {
  content: '⚠️ 注意';
  display: block;
  font-weight: var(--font-weight-bold);
  color: var(--color-danger);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
}

/* --- 成功ボックス --- */
.post__content .success-box {
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.04), rgba(46, 124, 246, 0.04));
  border: 1px solid rgba(0, 212, 170, 0.15);
  border-left: 4px solid var(--color-success);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  padding: var(--space-xl) var(--space-2xl);
  margin: var(--space-xl) 0;
}

.post__content .success-box::before {
  content: '✅ メリット';
  display: block;
  font-weight: var(--font-weight-bold);
  color: var(--color-success);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
}

/* --- ステップ表示 --- */
.post__content .step-box {
  background: var(--color-bg-white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl) var(--space-2xl);
  margin: var(--space-xl) 0;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  position: relative;
  padding-left: 4.5rem;
  transition: all var(--transition-base);
}

.post__content .step-box:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

.post__content .step-box[data-step]::before {
  content: 'STEP ' attr(data-step);
  position: absolute;
  left: var(--space-lg);
  top: var(--space-xl);
  font-size: var(--font-size-xs);
  font-family: var(--font-family-en);
  font-weight: var(--font-weight-bold);
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.05em;
}

/* --- CTA（記事末の問い合わせ誘導） --- */
.post__content .post-cta {
  background: var(--color-accent-gradient);
  background-size: 200% 200%;
  animation: gradientShift 4s ease infinite;
  color: var(--color-text-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl) var(--space-3xl);
  margin: var(--space-3xl) 0 var(--space-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(46, 124, 246, 0.25);
}

.post__content .post-cta::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: gradientShift 6s ease infinite;
}

.post__content .post-cta h3 {
  color: var(--color-text-white);
  border-left: none;
  padding-left: 0;
  margin-top: 0;
  font-size: var(--font-size-xl);
}

.post__content .post-cta p {
  opacity: 0.92;
  font-size: var(--font-size-md);
}

.post__content .post-cta a {
  display: inline-block;
  background: var(--color-bg-white);
  color: var(--color-accent-start);
  text-decoration: none;
  padding: 0.875rem 2.5rem;
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-md);
  transition: all var(--transition-base);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 1;
  background-image: none;
}

.post__content .post-cta a:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  color: var(--color-primary);
}

/* --- FAQ構造化データ対応セクション --- */
.post__content .faq-section {
  margin: var(--space-2xl) 0;
}

.post__content .faq-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  overflow: hidden;
  transition: all var(--transition-base);
  background: var(--color-bg-white);
}

.post__content .faq-item:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(46, 124, 246, 0.15);
  transform: translateY(-2px);
}

.post__content .faq-question {
  font-weight: var(--font-weight-semibold);
  padding: var(--space-lg) var(--space-xl);
  background: linear-gradient(135deg, rgba(240, 242, 245, 0.8), rgba(240, 242, 245, 0.4));
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--font-size-base);
  margin: 0;
  transition: background var(--transition-fast);
}

.post__content .faq-question:hover {
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.05), rgba(0, 212, 170, 0.03));
}

.post__content .faq-question::before {
  content: 'Q';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2em;
  height: 2em;
  min-width: 2em;
  border-radius: 50%;
  background: var(--color-accent-gradient);
  color: var(--color-text-white);
  font-size: 0.85em;
  font-family: var(--font-family-en);
  font-weight: var(--font-weight-bold);
  box-shadow: 0 3px 8px rgba(46, 124, 246, 0.2);
}

.post__content .faq-answer {
  padding: var(--space-lg) var(--space-xl);
  padding-left: calc(var(--space-xl) + 2em + var(--space-md));
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
  border-top: 1px solid var(--color-border-light);
}

.post__content .faq-answer p:last-child {
  margin-bottom: 0;
}

/* --- 比較テーブルの強化 --- */
.post__content .comparison-table th:first-child {
  background: var(--color-bg-dark);
}

.post__content .comparison-table td:first-child {
  font-weight: var(--font-weight-semibold);
  background: rgba(240, 242, 245, 0.5);
}

/* --- 数字ハイライト --- */
.post__content .stat-number {
  display: inline-block;
  font-size: 2em;
  font-weight: var(--font-weight-black);
  font-family: var(--font-family-en);
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.post__content .stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ------------------------------------
   記事フッター
   ------------------------------------ */
.post__footer {
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 2px solid var(--color-border-light);
  position: relative;
}

.post__footer::before {
  content: '';
  position: absolute;
  top: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--color-accent-gradient);
}

.post__share {
  margin-bottom: var(--space-2xl);
  text-align: center;
}

.post__share-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  letter-spacing: 0.05em;
}

.post__share-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
}

.post__share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  transition: all var(--transition-base);
  font-size: var(--font-size-lg);
}

.post__share-btn:hover {
  background: var(--color-accent-gradient);
  color: var(--color-text-white);
  transform: translateY(-3px) scale(1.1);
  box-shadow: 0 6px 20px rgba(46, 124, 246, 0.25);
}

/* ------------------------------------
   前後ナビゲーション
   ------------------------------------ */
.post__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.post__nav-link {
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-lg);
  background: var(--color-bg-alt);
  text-decoration: none;
  transition: all var(--transition-base);
  border: 1px solid transparent;
}

.post__nav-link:hover {
  background: var(--color-bg-white);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: rgba(46, 124, 246, 0.1);
}

.post__nav-label {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-family: var(--font-family-en);
}

.post__nav-title {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-medium);
  margin-top: var(--space-xs);
  line-height: var(--line-height-tight);
}

.post__nav-link--next {
  text-align: right;
}

/* ============================================
   アーカイブ（記事一覧）
   ============================================ */
.blog__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.blog-card {
  overflow: hidden;
  padding: 0;
  border-radius: var(--radius-xl);
  background: var(--color-bg-white);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border-light);
}

.blog-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-6px);
  border-color: rgba(46, 124, 246, 0.1);
}

.blog-card__image {
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  position: relative;
}

.blog-card__image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.05));
  pointer-events: none;
}

.blog-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.blog-card:hover .blog-card__image img {
  transform: scale(1.08);
}

.blog-card__body {
  padding: var(--space-xl);
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}

.blog-card__date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-family: var(--font-family-en);
}

.blog-card__cat {
  font-size: var(--font-size-xs);
  padding: 0.15rem 0.625rem;
  background: linear-gradient(135deg, rgba(46, 124, 246, 0.06), rgba(0, 212, 170, 0.06));
  border-radius: var(--radius-full);
  color: var(--color-accent-start);
  font-weight: var(--font-weight-semibold);
}

.blog-card__title {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-sm);
  line-height: var(--line-height-tight);
}

.blog-card__title a {
  color: var(--color-text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.blog-card__title a:hover {
  color: var(--color-accent-start);
}

.blog-card__excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-base);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ページネーション */
.nav-links {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-3xl);
}

.page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: var(--font-size-sm);
  font-family: var(--font-family-en);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-base);
  font-weight: var(--font-weight-medium);
}

.page-numbers:hover {
  background: var(--color-bg-alt);
  color: var(--color-accent-start);
  transform: translateY(-2px);
}

.page-numbers.current {
  background: var(--color-accent-gradient);
  color: var(--color-text-white);
  box-shadow: 0 4px 12px rgba(46, 124, 246, 0.25);
}

/* ============================================
   レスポンシブ
   ============================================ */
@media (max-width: 768px) {
  .post__nav {
    grid-template-columns: 1fr;
  }

  .blog__grid {
    grid-template-columns: 1fr;
  }

  .post__content h2 {
    padding: var(--space-sm) var(--space-md);
  }

  .post__content table {
    font-size: var(--font-size-xs);
  }

  .post__content th,
  .post__content td {
    padding: 0.5rem 0.75rem;
  }

  .post__content .post-cta {
    padding: var(--space-xl) var(--space-lg);
  }

  .post__content .post-cta a {
    display: block;
    text-align: center;
  }

  .post__content blockquote {
    padding: var(--space-md) var(--space-lg);
  }

  .post__content .step-box {
    padding-left: var(--space-xl);
    padding-top: 3rem;
  }

  .post__content .step-box[data-step]::before {
    top: var(--space-md);
    left: var(--space-xl);
  }

  .post__content .highlight-box,
  .post__content .point-box,
  .post__content .warning-box,
  .post__content .success-box {
    padding: var(--space-lg);
  }
}