/* ==========================================================================
   トップページ専用CSS
   ========================================================================== */

/* SECTION 02: Issue */
.issue-card {
  background: var(--color-bg-base);
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--radius-md);
  text-align: center;
  border: 1px solid var(--color-border);
  transition: all 0.2s;
}
.issue-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.issue-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-md);
  border-radius: 50%;
  background: var(--color-brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 18px;
  color: var(--color-brand-primary);
}
.issue-card__title { font-size: 16px; font-weight: 700; margin-bottom: var(--space-sm); line-height: 1.5; }
.issue-card__text { font-size: 13px; line-height: 1.7; color: var(--color-text-secondary); }

/* SECTION 03: Before/After */
.concept__lead {
  max-width: 800px;
  margin: 0 auto var(--space-2xl);
  font-size: 17px;
  line-height: 1.9;
  text-align: center;
  color: var(--color-text-secondary);
}
.beforeafter { display: grid; gap: var(--space-lg); }
.beforeafter__row {
  background: var(--color-bg-base);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}
.beforeafter__title { font-size: 18px; font-weight: 700; margin-bottom: var(--space-md); color: var(--color-brand-primary); }
.beforeafter__cols {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  gap: var(--space-md);
  align-items: center;
}
.beforeafter__cell {
  background: var(--color-bg-gray);
  padding: var(--space-md);
  border-radius: var(--radius-sm);
  min-height: 200px;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.beforeafter__label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  align-self: flex-start;
}
.beforeafter__label--before { background: #999; color: #fff; }
.beforeafter__label--after { background: var(--color-accent); color: #fff; }
.beforeafter__placeholder {
  width: 100%;
  height: 140px;
  background: var(--color-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--color-text-muted);
}
.beforeafter__caption { font-size: 13px; line-height: 1.6; color: var(--color-text-secondary); }
.beforeafter__arrow { font-size: 32px; color: var(--color-accent); text-align: center; font-family: var(--font-en); }

/* SECTION 04: TFS主役 */
.feature-tfs__title { margin-bottom: var(--space-sm); }
.feature-tfs__subtitle { color: var(--color-text-secondary); margin-bottom: var(--space-2xl); font-size: 18px; }
.feature-tfs__intro {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-lg);
  align-items: center;
  margin-bottom: var(--space-2xl);
}
.feature-tfs__video {
  position: relative;
  background: var(--color-bg-gray);
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16/10;
}
.feature-tfs__video img { width: 100%; height: 100%; object-fit: cover; }
.feature-tfs__video::after {
  content: "▶";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 32px;
  color: var(--color-text-white);
  background: rgba(232, 85, 40, 0.9);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: 6px;
}
.feature-tfs__video-label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  padding: 4px 10px;
  font-size: 11px;
  border-radius: var(--radius-sm);
  z-index: 1;
}
.feature-tfs__intro-text p { margin-bottom: var(--space-md); }
.feature-tfs__intro-text p:last-child { margin-bottom: 0; }
.feature-tfs__features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}
.feature-item { text-align: center; }
.feature-item__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-md);
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(232,85,40,0.1) 0%, rgba(232,85,40,0.2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 22px;
  color: var(--color-accent);
}
.feature-item__title { font-size: 15px; font-weight: 700; margin-bottom: var(--space-xs); line-height: 1.5; }
.feature-item__text { font-size: 12px; line-height: 1.7; color: var(--color-text-secondary); }

.feature-tfs__products {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.feature-tfs__cta { text-align: center; padding-top: var(--space-md); border-top: 1px solid var(--color-border); }

/* SECTION 05: NARGO */
.feature-nargo__title { margin-bottom: var(--space-sm); }
.feature-nargo__subtitle { color: var(--color-text-secondary); margin-bottom: var(--space-2xl); font-size: 17px; }
.feature-nargo__intro {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-lg);
  align-items: center;
  margin-bottom: var(--space-2xl);
}
.feature-nargo__image {
  background: var(--color-bg-gray);
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
}
.feature-nargo__image img { max-width: 100%; max-height: 100%; object-fit: contain; }
.feature-nargo__intro-text p { margin-bottom: var(--space-md); }
.feature-nargo__intro-text p:last-child { margin-bottom: 0; }

.nargo-lineup {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}
.nargo-card {
  background: var(--color-bg-gray);
  border-radius: var(--radius-sm);
  padding: var(--space-sm);
  text-align: center;
  border: 1px solid var(--color-border);
  transition: all 0.2s;
}
.nargo-card:hover { background: var(--color-bg-base); border-color: var(--color-brand-primary); }
.nargo-card__image {
  width: 100%;
  height: 80px;
  background: var(--color-bg-base);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.nargo-card__image img { max-width: 90%; max-height: 80%; object-fit: contain; }
.nargo-card__name { font-size: 13px; font-weight: 700; margin-bottom: 4px; }
.nargo-card__type { font-size: 11px; color: var(--color-text-secondary); margin-bottom: 4px; }
.nargo-card__use { font-size: 10px; color: var(--color-text-muted); line-height: 1.5; }
.nargo-card__warn {
  display: inline-block;
  background: var(--color-warning);
  color: var(--color-text-primary);
  font-size: 9px;
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  margin-top: 4px;
  font-weight: 700;
}
.feature-nargo__cta { text-align: center; }

/* SECTION 06: Category */
.category-tile {
  background: var(--color-bg-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.2s;
  cursor: pointer;
  display: block;
}
.category-tile:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); border-color: var(--color-brand-primary); opacity: 1; }
.category-tile__image {
  background: var(--color-bg-gray);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
}
.category-tile__image img { max-width: 100%; max-height: 100%; object-fit: contain; }
.category-tile__body { padding: var(--space-md); }
.category-tile__name { font-size: 16px; font-weight: 700; margin-bottom: var(--space-xs); color: var(--color-brand-primary); }
.category-tile__text { font-size: 13px; color: var(--color-text-secondary); line-height: 1.7; }

/* SECTION 08: Video */
.video-card {
  background: var(--color-bg-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.video-card__thumb {
  background: var(--color-bg-dark);
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  color: var(--color-text-muted);
  font-size: 13px;
}
.video-card__thumb::before {
  content: "▶";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 28px;
  color: rgba(255,255,255,0.7);
  background: rgba(232, 85, 40, 0.9);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: 4px;
}
.video-card__body { padding: var(--space-md); }
.video-card__title { font-size: 15px; font-weight: 700; }

/* SECTION 09: Flow */
.flow-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
}
.flow-step {
  background: var(--color-bg-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}
.flow-step__num {
  font-family: var(--font-en);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-sm);
}
.flow-step__title { font-size: 15px; font-weight: 700; margin-bottom: var(--space-xs); }
.flow-step__text { font-size: 12px; color: var(--color-text-secondary); line-height: 1.7; }

/* SECTION 10: FAQ */
.faq-list { max-width: 880px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-item summary {
  padding: var(--space-md) 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  transition: color 0.2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--color-brand-primary); }
.faq-item summary::before {
  content: "Q";
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: var(--color-brand-primary);
  color: var(--color-text-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 14px;
}
.faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-size: 24px;
  color: var(--color-text-muted);
  font-weight: 300;
  transition: transform 0.2s;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item__answer { padding: 0 0 var(--space-md) 44px; font-size: 14px; line-height: 1.9; color: var(--color-text-secondary); }

/* ==========================================================================
   SECTION 03.5: Value Proposition（価格比較の視点転換）
   ========================================================================== */
.value-prop__intro {
  max-width: 880px;
  margin: 0 auto var(--space-2xl);
  text-align: center;
}
.value-prop__question {
  display: inline-block;
  background: var(--color-bg-base);
  color: var(--color-brand-primary);
  font-size: 13px;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-brand-primary);
  margin-bottom: var(--space-md);
  letter-spacing: 0.05em;
}
.value-prop__headline {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: var(--space-md);
}
.value-prop__headline strong {
  color: var(--color-accent);
  border-bottom: 3px solid var(--color-accent);
  padding-bottom: 2px;
}
.value-prop__lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text-secondary);
  text-align: left;
  max-width: 760px;
  margin: 0 auto;
}

/* 比較フレーム */
.cost-frame {
  background: var(--color-bg-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}
.cost-frame__title {
  text-align: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-brand-primary);
  margin-bottom: var(--space-lg);
}
.cost-frame__cols {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  gap: var(--space-md);
  align-items: stretch;
}
.cost-frame__col {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
}
.cost-frame__col--narrow {
  background: var(--color-bg-gray);
  border: 1px solid var(--color-border);
}
.cost-frame__col--wide {
  background: var(--color-brand-light);
  border: 2px solid var(--color-brand-primary);
}
.cost-frame__label {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-md);
}
.cost-frame__label--narrow {
  background: #888;
  color: #fff;
}
.cost-frame__label--wide {
  background: var(--color-brand-primary);
  color: #fff;
}
.cost-frame__heading {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: var(--space-md);
  line-height: 1.5;
}
.cost-frame__col ul {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text-secondary);
}
.cost-frame__col li {
  padding-left: 20px;
  position: relative;
  margin-bottom: 4px;
}
.cost-frame__col--narrow li::before {
  content: "・";
  position: absolute;
  left: 4px;
}
.cost-frame__col--wide li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}
.cost-frame__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--color-accent);
  font-family: var(--font-en);
}

/* 検討の視点（8項目） */
.viewpoint-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-2xl);
}
.viewpoint-card {
  background: var(--color-bg-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-align: center;
  transition: all 0.2s;
}
/* .viewpoint-card:hover {
  border-color: var(--color-brand-primary);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
} */
.viewpoint-card__icon {
  font-size: 28px;
  margin-bottom: var(--space-xs);
  line-height: 1;
}
.viewpoint-card__title {
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 4px;
  line-height: 1.5;
  color: var(--color-text-primary);
}
.viewpoint-card__text {
  font-size: 11px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* まとめメッセージ */
.value-prop__summary {
  background: var(--color-bg-base);
  border-left: 4px solid var(--color-accent);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  font-size: 15px;
  line-height: 1.9;
  color: var(--color-text-primary);
}
.value-prop__summary strong {
  color: var(--color-brand-primary);
}
.value-prop__cta {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  flex-wrap: wrap;
}
.value-prop__note {
  text-align: center;
  margin-top: var(--space-md);
  font-size: 12px;
  color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 1023px) {
  .feature-tfs__intro,
  .feature-nargo__intro { grid-template-columns: 1fr; }
  .feature-tfs__features { grid-template-columns: repeat(2, 1fr); }
  .nargo-lineup { grid-template-columns: repeat(3, 1fr); }
  .flow-list { grid-template-columns: repeat(3, 1fr); }
  .viewpoint-grid { grid-template-columns: repeat(2, 1fr); }
  .value-prop__headline { font-size: 26px; }
}

@media (max-width: 767px) {
  .nargo-lineup { grid-template-columns: repeat(2, 1fr); }
  .feature-tfs__features { grid-template-columns: repeat(2, 1fr); }
  .feature-tfs__products { grid-template-columns: 1fr; }
  .flow-list { grid-template-columns: 1fr; }
  .beforeafter__cols { grid-template-columns: 1fr; }
  .beforeafter__arrow { transform: rotate(90deg); }
  
  /* Value Proposition Section */
  .value-prop__headline { font-size: 22px; line-height: 1.5; }
  .cost-frame { padding: var(--space-lg) var(--space-md); }
  .cost-frame__cols { grid-template-columns: 1fr; }
  .cost-frame__arrow { transform: rotate(90deg); padding: var(--space-sm) 0; }
  .viewpoint-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .viewpoint-card { padding: var(--space-sm); }
  .viewpoint-card__icon { font-size: 24px; }
  .viewpoint-card__title { font-size: 12px; }
}