/* =========================================
   ai-research.css — Labs / AI Research ページ固有スタイル
   ========================================= */


/* ----- ヒーロー ----- */
.ar-hero {
  padding-top: var(--nav-height);
  background: linear-gradient(to bottom, #e5c8e5 0%, #f4eef8 65%, #ffffff 100%);
  text-align: center;
}
.ar-hero__inner {
  padding: 72px 32px 64px;
  max-width: 760px;
  margin: 0 auto;
}
.ar-hero__label {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.ar-hero__title {
  font-family: var(--font-ui);
  font-size: 40pt;
  font-weight: 700;
  color: var(--color-text-dark);
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin-bottom: 24px;
}
.ar-hero__tagline {
  font-family: var(--font-jp);
  font-size: 13pt;
  color: var(--color-text);
  line-height: 1.9;
}


/* ----- フィロソフィー ----- */
.ar-philosophy {
  background: var(--color-white);
  padding: 88px 32px;
  border-top: 1px solid var(--color-divider-lt);
}
.ar-philosophy__inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}
.ar-philosophy__label {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.ar-philosophy__heading {
  font-family: var(--font-jp);
  font-size: 17pt;
  font-weight: 700;
  color: var(--color-text-dark);
  line-height: 1.7;
  margin-bottom: 28px;
}
.ar-philosophy__body {
  font-family: var(--font-jp);
  font-size: 12pt;
  color: var(--color-text);
  line-height: 2;
  text-align: left;
}


/* ----- 取り組みリスト ----- */
.ar-topics {
  background: var(--color-bg);
  padding: 88px 32px;
  border-top: 1px solid var(--color-divider-lt);
}
.ar-topics__inner {
  max-width: 760px;
  margin: 0 auto;
}
.ar-topics__label {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.ar-topics__heading {
  font-family: var(--font-jp);
  font-size: 18pt;
  font-weight: 700;
  color: var(--color-text-dark);
  line-height: 1.5;
  margin-bottom: 56px;
}
.ar-topic {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 24px;
  padding: 48px 0;
  border-bottom: 1px solid var(--color-divider-lt);
  align-items: start;
}
.ar-topic:first-of-type {
  border-top: 1px solid var(--color-divider-lt);
}
.ar-topic__num {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  padding-top: 4px;
}
.ar-topic__content {}
.ar-topic__title {
  font-family: var(--font-jp);
  font-size: 16pt;
  font-weight: 700;
  color: var(--color-text-dark);
  line-height: 1.5;
  margin-bottom: 16px;
}
.ar-topic__body {
  font-family: var(--font-jp);
  font-size: 12pt;
  color: var(--color-text);
  line-height: 2;
}


/* ----- コアメッセージ（クレド） ----- */
.ar-credo {
  background: linear-gradient(135deg, #3b0044 0%, #8B008B 100%);
  padding: 104px 32px 112px;
  text-align: center;
}
.ar-credo__inner {
  max-width: 720px;
  margin: 0 auto;
}
.ar-credo__label {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 32px;
}
.ar-credo__mark {
  font-family: var(--font-jp);
  font-size: 48pt;
  color: rgba(255, 255, 255, 0.2);
  line-height: 1;
  margin-bottom: -16px;
  display: block;
}
.ar-credo__quote {
  font-family: var(--font-jp);
  font-size: 18pt;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.9;
  margin-bottom: 40px;
}
.ar-credo__body {
  font-family: var(--font-jp);
  font-size: 11pt;
  color: rgba(255, 255, 255, 0.75);
  line-height: 2;
  text-align: left;
}
.ar-credo__divider {
  width: 40px;
  height: 1px;
  background: rgba(255, 255, 255, 0.3);
  margin: 40px auto;
}


/* ----- CTA ----- */
.ar-cta {
  background: var(--color-white);
  padding: 80px 32px 96px;
  text-align: center;
  border-top: 1px solid var(--color-divider-lt);
}
.ar-cta__text {
  font-family: var(--font-jp);
  font-size: 13pt;
  color: var(--color-text);
  line-height: 1.9;
  margin-bottom: 32px;
}


/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 767px) {
  .ar-hero__inner    { padding: 56px 24px 48px; }
  .ar-hero__title    { font-size: 28pt; }
  .ar-hero__tagline  { font-size: 12pt; }

  .ar-philosophy     { padding: 64px 24px; }
  .ar-philosophy__heading { font-size: 14pt; }

  .ar-topics         { padding: 64px 24px; }
  .ar-topics__heading { font-size: 15pt; }
  .ar-topic          { grid-template-columns: 1fr; gap: 8px; padding: 36px 0; }
  .ar-topic__title   { font-size: 14pt; }

  .ar-credo          { padding: 72px 24px 80px; }
  .ar-credo__quote   { font-size: 14pt; }
  .ar-credo__mark    { font-size: 36pt; }

  .ar-cta            { padding: 56px 24px 72px; }
}