/* ==========================================================================
   ai.css — /ai/ AI業務自動化・AIシステム開発 LP 専用スタイル
   service-base.css（.svc トークン）の上に .ai- プレフィックスで追加
   方針: BtoB・実務的・落ち着いたデザイン（ロボット／ネオン／紫グラデは使わない）
   ========================================================================== */

.ai-page .ai-pc-only { display: none; }
@media (min-width: 768px) { .ai-page .ai-pc-only { display: inline; } }

.ai-strong {
  font-weight: 700;
  color: var(--svc-text);
  background: linear-gradient(transparent 62%, var(--svc-amber-pale) 62%);
}
.svc-section--ink .ai-strong { color: #fff; background: linear-gradient(transparent 62%, rgba(224,161,58,0.35) 62%); }

.ai-badge {
  display: inline-block;
  font-family: var(--svc-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  padding: 0.2rem 0.6rem;
  border-radius: 2px;
  background: var(--svc-amber);
  color: #2a1c04;
  font-weight: 700;
  white-space: nowrap;
}

.ai-note {
  margin-top: 2rem;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--svc-amber);
  background: var(--svc-paper-2);
  color: var(--svc-text-mid);
  font-size: 0.92rem;
  line-height: 1.9;
}

/* --------------------------------------------------------------------------
   1. Hero
   -------------------------------------------------------------------------- */
.ai-hero { padding-block: clamp(56px, 8vw, 110px); }
.ai-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.9fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.ai-hero__title {
  font-family: var(--svc-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
  margin-top: 1rem;
  color: var(--svc-text);
  text-wrap: balance;
}
.ai-hero__lead {
  margin-top: 1.5rem;
  color: var(--svc-text-mid);
  font-size: clamp(0.95rem, 1.6vw, 1.06rem);
  line-height: 2;
  max-width: 58ch;
}
.ai-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}
.ai-hero__note {
  margin-top: 1rem;
  font-size: 0.82rem;
  color: var(--svc-muted);
}
.ai-hero__card {
  background: #fff;
  border: 1px solid var(--svc-line);
  border-radius: 3px;
  padding: clamp(1.4rem, 3vw, 2rem);
  box-shadow: var(--svc-shadow-lift);
}
.ai-hero__card-title {
  font-family: var(--svc-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--svc-blue-deep);
  margin-bottom: 1rem;
}
.ai-hero__card-list { list-style: none; margin: 0; padding: 0; }
.ai-hero__card-list li {
  display: flex;
  gap: 0.7em;
  align-items: flex-start;
  padding: 0.6rem 0;
  border-top: 1px solid var(--svc-line-soft);
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--svc-text);
}
.ai-hero__card-list li:first-child { border-top: 0; }
.ai-hero__card-list i { color: var(--svc-blue); margin-top: 0.35em; font-size: 0.8em; }
.ai-hero__card-foot {
  margin-top: 1rem;
  font-family: var(--svc-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--svc-muted);
}
@media (max-width: 860px) {
  .ai-hero__grid { grid-template-columns: 1fr; }
}

/* --------------------------------------------------------------------------
   2. Problem — 12カード
   -------------------------------------------------------------------------- */
.ai-problem__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.9rem;
}
.ai-problem__item {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  background: #fff;
  border: 1px solid var(--svc-line);
  border-radius: 3px;
  font-weight: 700;
  font-size: 0.93rem;
  color: var(--svc-text);
}
.ai-problem__item i {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  background: var(--svc-blue-pale);
  color: var(--svc-blue-deep);
  border-radius: 3px;
  flex-shrink: 0;
}
@media (max-width: 960px) { .ai-problem__grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .ai-problem__grid { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; } .ai-problem__item { font-size: 0.84rem; padding: 0.8rem 0.7rem; } }

/* --------------------------------------------------------------------------
   3. Use cases — 4カテゴリ
   -------------------------------------------------------------------------- */
.ai-usecase__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.ai-usecase {
  padding: clamp(1.4rem, 3vw, 2rem);
  background: #fff;
  border: 1px solid var(--svc-line);
  border-radius: 3px;
  position: relative;
}
.ai-usecase--brand { border-color: var(--svc-amber); box-shadow: var(--svc-shadow-lift); }
.ai-usecase__head {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}
.ai-usecase__icon {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  background: var(--svc-ink);
  color: #fff;
  border-radius: 3px;
  font-size: 1.1rem;
}
.ai-usecase--brand .ai-usecase__icon { background: var(--svc-blue); }
.ai-usecase__title {
  font-family: var(--svc-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--svc-text);
}
.ai-usecase__list { list-style: none; margin: 0; padding: 0; }
.ai-usecase__list li {
  position: relative;
  padding: 0.45rem 0 0.45rem 1.3rem;
  border-top: 1px dashed var(--svc-line-soft);
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--svc-text-mid);
}
.ai-usecase__list li::before {
  content: "→";
  position: absolute; left: 0; top: 0.45rem;
  font-family: var(--svc-mono);
  color: var(--svc-blue);
}
@media (max-width: 760px) { .ai-usecase__grid { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   4. Before / After（インク面）
   -------------------------------------------------------------------------- */
.ai-ba__list { display: grid; gap: 1.5rem; }
.ai-ba__item {
  background: var(--svc-ink-2);
  border: 1px solid var(--svc-line-ink);
  border-radius: 3px;
  padding: clamp(1.4rem, 3vw, 2.2rem);
}
.ai-ba__label h3 {
  font-family: var(--svc-display);
  font-size: 1.2rem;
  color: #fff;
}
.ai-ba__label p {
  margin-top: 0.3rem;
  font-family: var(--svc-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--svc-on-ink-mid);
}
.ai-ba__cols {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.25rem;
  align-items: stretch;
  margin-top: 1.25rem;
}
.ai-ba__col {
  padding: 1.2rem 1.3rem;
  border-radius: 3px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--svc-line-ink);
}
.ai-ba__col--after { border-color: rgba(224,161,58,0.55); background: rgba(224,161,58,0.06); }
.ai-ba__col-title {
  font-family: var(--svc-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--svc-amber);
  margin-bottom: 0.6rem;
}
.ai-ba__col--before .ai-ba__col-title { color: var(--svc-on-ink-mid); }
.ai-ba__col-title small { font-size: 0.72rem; letter-spacing: 0.04em; margin-left: 0.5em; opacity: 0.8; text-transform: none; }
.ai-ba__col ol { margin: 0; padding-left: 1.6em; list-style: decimal; color: var(--svc-on-ink); font-size: 0.92rem; line-height: 1.9; }
.ai-ba__col ol li { list-style: decimal; }
.ai-ba__col ol li::marker { color: var(--svc-on-ink-mid); font-family: var(--svc-mono); font-size: 0.8em; }
.ai-ba__time {
  margin-top: 0.8rem;
  font-family: var(--svc-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--svc-on-ink-mid);
}
.ai-ba__time--after { color: var(--svc-amber); }
.ai-ba__arrow {
  display: grid; place-items: center;
  color: var(--svc-amber);
  font-size: 1.6rem;
}
.ai-ba__foot {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--svc-on-ink-mid);
}
@media (max-width: 700px) {
  .ai-ba__cols { grid-template-columns: 1fr; }
  .ai-ba__arrow { transform: rotate(90deg); }
}

/* --------------------------------------------------------------------------
   5. How it works
   -------------------------------------------------------------------------- */
.ai-how__steps {
  list-style: none;
  margin: 0; padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.9rem;
  counter-reset: none;
}
.ai-how__steps li {
  position: relative;
  padding: 1.4rem 1.1rem 1.2rem;
  background: #fff;
  border: 1px solid var(--svc-line);
  border-radius: 3px;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.ai-how__steps li b { font-size: 1rem; color: var(--svc-text); }
.ai-how__steps li span:last-child { font-size: 0.85rem; line-height: 1.75; color: var(--svc-text-mid); }
.ai-how__no {
  font-family: var(--svc-mono);
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--svc-blue-deep);
  letter-spacing: 0.1em;
}
.ai-how__no::before { content: "STEP "; }
.ai-how__principle {
  margin-top: 2.5rem;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--svc-line);
  border-left: 4px solid var(--svc-amber);
  background: var(--svc-paper-2);
  text-align: center;
  font-size: 1.02rem;
  line-height: 2;
  color: var(--svc-text-mid);
}
@media (max-width: 960px) { .ai-how__steps { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .ai-how__steps { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   6. Services & Pricing
   -------------------------------------------------------------------------- */
.ai-service__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.ai-service {
  display: flex;
  flex-direction: column;
  padding: clamp(1.5rem, 3vw, 2.2rem);
  background: #fff;
  border: 1px solid var(--svc-line);
  border-radius: 3px;
}
.ai-service__no {
  font-family: var(--svc-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--svc-blue-deep);
}
.ai-service__title {
  font-family: var(--svc-display);
  font-size: 1.35rem;
  font-weight: 700;
  margin-top: 0.5rem;
  color: var(--svc-text);
}
.ai-service__copy { margin-top: 0.4rem; font-weight: 700; font-size: 0.93rem; color: var(--svc-text); }
.ai-service__desc { margin-top: 0.8rem; font-size: 0.9rem; line-height: 1.9; color: var(--svc-text-mid); flex: 1; }
.ai-service__price {
  margin-top: 1.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--svc-line-soft);
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.ai-service__price-val {
  font-family: var(--svc-display);
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--svc-text);
}
.ai-service__price-note { font-size: 0.74rem; color: var(--svc-muted); }
.ai-service__maint {
  margin-top: 0.4rem;
  font-size: 0.84rem;
  color: var(--svc-text-mid);
  display: flex; align-items: center; gap: 0.5em;
}
.ai-service__maint i { color: var(--svc-blue); }
.ai-service .svc-btn { margin-top: 1.2rem; }
.ai-service__notes {
  margin: 2rem 0 0;
  padding: 0 0 0 1.2em;
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--svc-text-mid);
}
@media (max-width: 900px) { .ai-service__grid { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   7. Why
   -------------------------------------------------------------------------- */
.ai-why__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}
.ai-why__item {
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--svc-line);
  border-radius: 3px;
  background: #fff;
}
.ai-why__item i {
  font-size: 1.4rem;
  color: var(--svc-blue);
}
.ai-why__item h3 {
  font-family: var(--svc-display);
  font-size: 1.15rem;
  margin-top: 0.8rem;
  color: var(--svc-text);
}
.ai-why__item p { margin-top: 0.6rem; font-size: 0.92rem; line-height: 1.9; color: var(--svc-text-mid); }
@media (max-width: 700px) { .ai-why__grid { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   8. Fit / Not fit
   -------------------------------------------------------------------------- */
.ai-fit__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.ai-fit__box {
  padding: clamp(1.4rem, 3vw, 2rem);
  border-radius: 3px;
  background: #fff;
  border: 1px solid var(--svc-line);
}
.ai-fit__box--yes { border-top: 4px solid var(--svc-blue); }
.ai-fit__box--no { border-top: 4px solid var(--svc-amber); }
.ai-fit__box h3 {
  font-family: var(--svc-display);
  font-size: 1.12rem;
  display: flex; align-items: center; gap: 0.5em;
  color: var(--svc-text);
}
.ai-fit__box--yes h3 i { color: var(--svc-blue); }
.ai-fit__box--no h3 i { color: var(--svc-amber-deep); }
.ai-fit__box ul { margin: 1rem 0 0; padding: 0; list-style: none; }
.ai-fit__box li {
  padding: 0.45rem 0 0.45rem 1.4rem;
  position: relative;
  border-top: 1px dashed var(--svc-line-soft);
  font-size: 0.93rem;
  color: var(--svc-text-mid);
}
.ai-fit__box li::before { content: "•"; position: absolute; left: 0.3rem; color: var(--svc-muted); }
.ai-fit__box p { margin-top: 1rem; font-size: 0.88rem; line-height: 1.8; color: var(--svc-text-mid); }
@media (max-width: 700px) { .ai-fit__grid { grid-template-columns: 1fr; } }

/* --------------------------------------------------------------------------
   9. Flow
   -------------------------------------------------------------------------- */
.ai-flow__list {
  list-style: none;
  margin: 0; padding: 0;
  counter-reset: aiflow;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.6rem;
}
.ai-flow__list li {
  counter-increment: aiflow;
  position: relative;
  padding: 2.2rem 0.9rem 1.1rem;
  background: #fff;
  border: 1px solid var(--svc-line);
  border-radius: 3px;
  display: flex; flex-direction: column; gap: 0.3rem;
}
.ai-flow__list li::before {
  content: counter(aiflow, decimal-leading-zero);
  position: absolute; top: 0.7rem; left: 0.9rem;
  font-family: var(--svc-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--svc-amber-deep);
  font-weight: 700;
}
.ai-flow__list li b { font-size: 0.95rem; color: var(--svc-text); }
.ai-flow__list li span { font-size: 0.8rem; line-height: 1.7; color: var(--svc-text-mid); }
@media (max-width: 1000px) { .ai-flow__list { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 640px) { .ai-flow__list { grid-template-columns: 1fr 1fr; } }

/* --------------------------------------------------------------------------
   10. FAQ（details/summary）
   -------------------------------------------------------------------------- */
.ai-faq__list { max-width: 860px; margin: 0 auto; display: grid; gap: 0.7rem; }
.ai-faq__item {
  background: #fff;
  border: 1px solid var(--svc-line);
  border-radius: 3px;
}
.ai-faq__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 1rem 1.2rem;
  font-weight: 700;
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--svc-text);
}
.ai-faq__item summary::-webkit-details-marker { display: none; }
.ai-faq__item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--svc-mono);
  color: var(--svc-blue);
  flex-shrink: 0;
}
.ai-faq__item[open] summary::after { content: "−"; }
.ai-faq__q {
  font-family: var(--svc-mono);
  font-weight: 700;
  color: var(--svc-amber-deep);
  flex-shrink: 0;
}
.ai-faq__a {
  padding: 0 1.2rem 1.1rem 3.1rem;
  font-size: 0.93rem;
  line-height: 1.9;
  color: var(--svc-text-mid);
}

/* --------------------------------------------------------------------------
   11. Contact
   -------------------------------------------------------------------------- */
.ai-contact__form .wpcf7-form small {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--svc-muted);
}
.ai-contact__form .wpcf7-form .wpcf7-list-item { margin: 0.35rem 1rem 0.35rem 0; }
.ai-contact__alt {
  margin-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--svc-muted);
}
.ai-contact__alt a { color: var(--svc-blue-deep); text-decoration: underline; }

/* --------------------------------------------------------------------------
   12. Related
   -------------------------------------------------------------------------- */
.ai-related { margin-top: 2.5rem; }
.ai-related__title {
  font-family: var(--svc-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--svc-blue-deep);
  margin-bottom: 0.6rem;
}
.ai-related__list { list-style: none; margin: 0; padding: 0; }
.ai-related__list li { border-top: 1px solid var(--svc-line-soft); }
.ai-related__list a {
  display: flex; align-items: center; gap: 0.6em;
  padding: 0.7rem 0;
  font-size: 0.93rem;
  color: var(--svc-text);
  text-decoration: none;
}
.ai-related__list a i { font-size: 0.7em; color: var(--svc-amber-deep); }
.ai-related__list a:hover { color: var(--svc-blue); }