/* ============================================================
   page-ai.css — AI Program LP
   B.I.Y Corporate Design System
   ============================================================ */

/* ── AI Hero ───────────────────────────────────────────── */
.ai-hero {
  position: relative;
  background-color: var(--color-navy);
  color: var(--color-white);
  padding: 200px 0 140px;
  overflow: hidden;
  text-align: center;
}

.ai-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 70% 50% at 50% 40%, rgba(200, 168, 74, 0.12) 0%, transparent 60%),
    linear-gradient(180deg, transparent 0%, rgba(8, 20, 39, 0.5) 100%);
  pointer-events: none;
}

.ai-hero__pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 100px 100px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,1) 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,1) 30%, transparent 80%);
}

.ai-hero__inner {
  position: relative;
  z-index: 2;
}

.ai-hero__tag {
  display: inline-block;
  padding: 0 16px;
  margin-bottom: 56px;
  font-family: var(--font-serif-en);
  font-size: 13px;
  letter-spacing: 0.12em;
  line-height: 1.8;
  text-transform: none;
  color: var(--color-gold);
  position: relative;
  font-weight: var(--fw-medium);
}

.ai-hero__tag::before,
.ai-hero__tag::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 60px;
  height: 1px;
  background: var(--color-gold-line);
}

.ai-hero__tag::before { right: 100%; }
.ai-hero__tag::after  { left: 100%; }

.ai-hero__title-en {
  font-family: var(--font-serif-en);
  font-size: clamp(14px, 1.4vw, 18px);
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: var(--color-gold);
  font-weight: var(--fw-medium);
  margin-bottom: 20px;
}

.ai-hero__title {
  font-family: var(--font-serif-ja);
  font-size: clamp(40px, 6.4vw, 76px);
  line-height: 1.3;
  letter-spacing: 0.18em;
  color: var(--color-white);
  font-weight: var(--fw-bold);
  margin-bottom: 24px;
}

.ai-hero__subtitle {
  font-family: var(--font-serif-ja);
  font-size: clamp(15px, 1.7vw, 18px);
  color: rgba(255, 255, 255, 0.66);
  letter-spacing: 0.24em;
  margin-bottom: 64px;
  padding-bottom: 24px;
  position: relative;
}

.ai-hero__subtitle::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 32px;
  height: 1px;
  background: var(--color-gold);
}

.ai-hero__lead {
  font-size: var(--fs-md);
  line-height: 2.2;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 72px;
  letter-spacing: 0.08em;
}

.ai-hero__lead strong {
  color: var(--color-gold);
  font-weight: var(--fw-bold);
}

/* Price — clean composition, no decorative frame */
.ai-hero__price {
  margin-bottom: 64px;
  position: relative;
  padding: 32px 0;
}

.ai-hero__price::before,
.ai-hero__price::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 1px;
  background: var(--color-gold-line);
}

.ai-hero__price::before { top: 0; }
.ai-hero__price::after  { bottom: 0; }

.ai-hero__price-label {
  display: block;
  font-family: var(--font-serif-en);
  font-size: 11px;
  letter-spacing: 0.36em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 16px;
  font-weight: var(--fw-medium);
}

.ai-hero__price-value {
  font-family: var(--font-serif-en);
  font-size: clamp(56px, 8vw, 96px);
  color: var(--color-white);
  letter-spacing: 0.02em;
  font-weight: var(--fw-semibold);
  line-height: 1;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.ai-hero__price-yen {
  font-size: 0.5em;
  color: var(--color-gold);
  font-weight: var(--fw-regular);
}

.ai-hero__price-value small {
  font-family: var(--font-serif-en);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.2em;
  font-weight: var(--fw-regular);
  margin-left: 12px;
  text-transform: lowercase;
  font-style: italic;
}

.ai-hero__price-period {
  margin-top: 16px;
  font-family: var(--font-sans-ja);
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.16em;
}

.ai-hero__cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

@media screen and (max-width: 768px) {
  .ai-hero { padding: 160px 0 100px; }
  .ai-hero__tag::before,
  .ai-hero__tag::after { width: 36px; }
  .ai-hero__price-value { font-size: 56px; }
  .ai-hero__price-value small { display: block; margin-left: 0; }
}

/* ── Worry section ─────────────────────────────────────── */
.worry-section {
  background-color: var(--color-bg-cream);
}

.worry-section__heading {
  font-family: var(--font-serif-ja);
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.1em;
  line-height: 1.5;
  margin-bottom: 64px;
}

.worry-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
  margin-bottom: 80px;
}

.worry-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 40px;
  align-items: center;
  padding: 32px 8px;
  border-bottom: 1px solid var(--color-border);
  transition: padding-left var(--transition-base), background-color var(--transition-base);
}

.worry-item:hover {
  padding-left: 24px;
  background: rgba(255, 255, 255, 0.4);
}

.worry-item__num {
  font-family: var(--font-serif-en);
  font-size: 36px;
  font-weight: var(--fw-semibold);
  color: var(--color-gold);
  letter-spacing: 0.02em;
  line-height: 1;
}

.worry-item p {
  font-family: var(--font-serif-ja);
  font-size: clamp(17px, 1.8vw, 22px);
  font-weight: var(--fw-medium);
  color: var(--color-navy);
  letter-spacing: 0.06em;
  line-height: 1.7;
  margin: 0;
}

.worry-section__answer {
  text-align: center;
  font-family: var(--font-serif-ja);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.1em;
  line-height: 1.6;
  padding: 32px 0;
  position: relative;
}

.worry-section__answer::before,
.worry-section__answer::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 1px;
  background: var(--color-gold);
}

.worry-section__answer::before { top: 0; }
.worry-section__answer::after { bottom: 0; }

.worry-section__answer span {
  color: var(--color-gold);
  margin: 0 0.08em;
}

@media screen and (max-width: 768px) {
  .worry-item { grid-template-columns: 56px 1fr; gap: 20px; padding: 24px 4px; }
  .worry-item__num { font-size: 28px; }
  .worry-item p { font-size: 15px; }
}

/* ── Feature headline (AI LP) ─────────────────────────── */
.feature-headline {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 96px;
  align-items: end;
  margin-bottom: 80px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border-soft);
}

.feature-headline__title {
  font-family: var(--font-serif-ja);
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.1em;
  line-height: 1.4;
}

.feature-headline__lead {
  font-size: var(--fs-md);
  line-height: 2.1;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  padding-bottom: 8px;
}

@media screen and (max-width: 992px) {
  .feature-headline { grid-template-columns: 1fr; gap: 24px; margin-bottom: 56px; padding-bottom: 32px; }
}

/* ── Feature section ───────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 80px;
}

.feature-card {
  padding: 56px 36px;
  background: var(--color-white);
  border: 1px solid var(--color-border-soft);
  position: relative;
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.feature-card__number {
  display: inline-block;
  font-family: var(--font-serif-en);
  font-size: 14px;
  letter-spacing: var(--tracking-widest);
  color: var(--color-gold);
  font-weight: var(--fw-medium);
  padding: 6px 18px;
  border: 1px solid var(--color-gold-line);
  border-radius: var(--radius-full);
  margin-bottom: 28px;
}

.feature-card__title {
  font-family: var(--font-serif-ja);
  font-size: var(--fs-h4);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.06em;
  line-height: 1.5;
  margin-bottom: 20px;
}

.feature-card__text {
  font-size: var(--fs-base);
  line-height: 2;
  color: var(--color-text-light);
  text-align: left;
  letter-spacing: 0.04em;
}

/* Program summary table */
.program-summary {
  max-width: 720px;
  margin: 0 auto;
  background: var(--color-bg-cream);
  border: 1px solid var(--color-border-soft);
  padding: 8px 40px;
}

.program-summary__list {
  display: flex;
  flex-direction: column;
}

.program-summary__row {
  display: grid;
  grid-template-columns: 140px 1fr;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border-soft);
}

.program-summary__row:last-child { border-bottom: none; }

.program-summary__row dt {
  font-family: var(--font-serif-ja);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.12em;
  position: relative;
  padding-left: 18px;
}

.program-summary__row dt::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 1px;
  background: var(--color-gold);
}

.program-summary__row dd {
  font-size: var(--fs-base);
  color: var(--color-text);
  letter-spacing: 0.04em;
}

.program-summary__row dd strong {
  font-family: var(--font-serif-en);
  font-size: var(--fs-h3);
  color: var(--color-gold);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  margin-right: 8px;
}

.program-summary__row dd span {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

/* ── Common headlines (AI LP large titles) ────────────── */
.curriculum-section__heading,
.deliverables-section__heading,
.options-section__heading {
  font-family: var(--font-serif-ja);
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.1em;
  line-height: 1.4;
  margin-bottom: 80px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border-soft);
}

.curriculum-section__heading span,
.deliverables-section__heading span,
.options-section__heading span,
.experience-headline__title span,
.apply-headline__title span {
  color: var(--color-gold);
}

.experience-headline,
.apply-headline {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 96px;
  align-items: end;
  margin-bottom: 80px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border-soft);
}

.section--navy-deep .apply-headline {
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.experience-headline__title,
.apply-headline__title {
  font-family: var(--font-serif-ja);
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.1em;
  line-height: 1.4;
}

.section--navy-deep .apply-headline__title { color: var(--color-white); }

.experience-headline__lead,
.apply-headline__lead {
  font-size: var(--fs-md);
  line-height: 2.1;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  padding-bottom: 8px;
}

.section--navy-deep .apply-headline__lead { color: rgba(255, 255, 255, 0.7); }

@media screen and (max-width: 992px) {
  .curriculum-section__heading,
  .deliverables-section__heading,
  .options-section__heading,
  .experience-headline,
  .apply-headline {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 56px;
    padding-bottom: 32px;
  }
}

/* ── Curriculum ────────────────────────────────────────── */
.curriculum-timeline {
  list-style: none;
  position: relative;
  padding: 0;
}

.curriculum-timeline::before {
  content: "";
  position: absolute;
  left: 100px;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: var(--color-gold-line);
}

.curriculum-week {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 48px;
  padding: 32px 0;
  position: relative;
}

.curriculum-week + .curriculum-week {
  margin-top: 16px;
  border-top: 1px solid var(--color-border-soft);
}

.curriculum-week__marker {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
  padding-top: 4px;
}

.curriculum-week__num {
  font-family: var(--font-serif-en);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
}

.curriculum-week__num strong {
  font-family: var(--font-serif-en);
  font-size: 48px;
  color: var(--color-gold);
  letter-spacing: 0.02em;
  font-weight: var(--fw-semibold);
  margin-top: 6px;
}

.curriculum-week__dot {
  position: absolute;
  right: -50px;
  top: 28px;
  width: 13px;
  height: 13px;
  background: var(--color-bg-cream);
  border: 2px solid var(--color-gold);
  border-radius: 50%;
  z-index: 1;
}

.curriculum-week__body {
  padding-top: 12px;
}

.curriculum-week__header {
  margin-bottom: 12px;
}

.curriculum-week__type {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-navy);
  color: var(--color-white);
  font-family: var(--font-sans-ja);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  font-weight: var(--fw-medium);
}

.curriculum-week__type--online {
  background: var(--color-gold);
}

.curriculum-week__title {
  font-family: var(--font-serif-ja);
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.06em;
  line-height: 1.5;
  margin-bottom: 20px;
}

.curriculum-week__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.curriculum-week__list li {
  position: relative;
  padding-left: 24px;
  font-size: var(--fs-base);
  line-height: 1.9;
  color: var(--color-text-light);
  letter-spacing: 0.04em;
}

.curriculum-week__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 12px;
  height: 1px;
  background: var(--color-gold);
}

/* ── Chat support card ─────────────────────────────────── */
.chat-card {
  background: var(--color-navy);
  color: var(--color-white);
  padding: 72px 64px;
  position: relative;
  overflow: hidden;
}

.chat-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at top right, rgba(200, 168, 74, 0.14) 0%, transparent 50%);
}

.chat-card__inner { position: relative; text-align: center; }

.chat-card__title {
  font-family: var(--font-serif-ja);
  font-size: var(--fs-h2);
  color: var(--color-white);
  letter-spacing: 0.08em;
  margin-bottom: 24px;
}

.chat-card__rule {
  width: 48px;
  height: 1px;
  background: var(--color-gold);
  margin: 0 auto 32px;
}

.chat-card__list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  font-size: var(--fs-md);
  color: rgba(255, 255, 255, 0.85);
  letter-spacing: 0.04em;
  line-height: 1.8;
}

.chat-card__list li {
  display: flex;
  gap: 14px;
  align-items: baseline;
}

.chat-card__list span {
  color: var(--color-gold);
  font-family: var(--font-serif-en);
}

/* ── Deliverables ──────────────────────────────────────── */
.deliverables-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.deliverable-card {
  background: var(--color-white);
  padding: 48px 24px;
  text-align: center;
  border: 1px solid var(--color-border-soft);
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.deliverable-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-gold-line);
}

.deliverable-card__num {
  display: block;
  font-family: var(--font-serif-en);
  font-size: 44px;
  color: var(--color-gold);
  line-height: 1;
  font-weight: var(--fw-semibold);
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.deliverable-card__num::after {
  content: "";
  display: block;
  width: 24px;
  height: 1px;
  background: var(--color-gold);
  margin: 18px auto 0;
}

.deliverable-card__title {
  font-family: var(--font-serif-ja);
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.06em;
  line-height: 1.6;
}

/* ── Experience ────────────────────────────────────────── */
.experience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.experience-card {
  padding: 44px 36px;
  background: var(--color-white);
  border: 1px solid var(--color-border-soft);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.experience-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-gold-line);
}

.experience-card__icon {
  width: 44px;
  height: 44px;
  color: var(--color-gold);
  margin-bottom: 24px;
}

.experience-card__icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.experience-card__title {
  font-family: var(--font-serif-ja);
  font-size: var(--fs-h4);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}

.experience-card__text {
  font-size: var(--fs-base);
  line-height: 1.9;
  color: var(--color-text-light);
  letter-spacing: 0.04em;
}

.experience-section__note {
  text-align: center;
  margin-top: 56px;
  font-size: var(--fs-sm);
  color: var(--color-text-light);
  line-height: 1.9;
  letter-spacing: 0.04em;
}

.experience-section__note small {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
}

/* ── Options ───────────────────────────────────────────── */
.options-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.option-card {
  background: var(--color-white);
  padding: 40px 24px;
  text-align: center;
  border: 1px solid var(--color-border-soft);
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.option-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.option-card__label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-serif-en);
  font-size: 18px;
  letter-spacing: 0.04em;
  font-weight: var(--fw-semibold);
  margin-bottom: 20px;
}

.option-card__title {
  font-family: var(--font-serif-ja);
  font-size: var(--fs-base);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.06em;
  line-height: 1.5;
  margin-bottom: 8px;
  min-height: 48px;
}

.option-card__price {
  font-family: var(--font-serif-en);
  font-size: 13px;
  color: var(--color-gold);
  letter-spacing: 0.08em;
  font-weight: var(--fw-medium);
}

.options-section__note {
  text-align: center;
  margin-top: 48px;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.9;
  letter-spacing: 0.04em;
}

/* ── Apply ─────────────────────────────────────────────── */
.apply-section {
  scroll-margin-top: 80px;
}

.apply-methods {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 1080px;
  margin: 0 auto;
}

.apply-method {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 56px 32px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  transition: border-color var(--transition-base), background-color var(--transition-base);
}

.apply-method:hover {
  border-color: var(--color-gold);
  background: rgba(255, 255, 255, 0.06);
}

.apply-method__icon {
  width: 48px;
  height: 48px;
  color: var(--color-gold);
  margin-bottom: 20px;
}

.apply-method__icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.apply-method__label {
  font-family: var(--font-serif-en);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 12px;
}

.apply-method__title {
  font-family: var(--font-serif-ja);
  font-size: var(--fs-h4);
  color: var(--color-white);
  letter-spacing: 0.08em;
  margin-bottom: 28px;
}

.apply-method__qr {
  width: 140px;
  height: 140px;
  background: var(--color-white);
  border: 1px solid rgba(200, 168, 74, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  margin-bottom: 28px;
}

.apply-method__qr img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.apply-method__tel {
  font-family: var(--font-serif-en);
  font-size: 28px;
  color: var(--color-white);
  letter-spacing: 0.04em;
  font-weight: var(--fw-semibold);
  margin-bottom: 6px;
}

.apply-method__sub {
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: var(--tracking-wider);
  margin-bottom: 24px;
}

.apply-method__btn { min-width: 0; width: 100%; }

.apply-section__note {
  text-align: center;
  margin-top: 56px;
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: var(--tracking-wide);
}

/* ── Responsive ────────────────────────────────────────── */
.md-only { display: none; }

@media screen and (max-width: 992px) {
  .features-grid { grid-template-columns: 1fr; gap: 20px; }
  .deliverables-grid { grid-template-columns: repeat(3, 1fr); }
  .experience-grid { grid-template-columns: repeat(2, 1fr); }
  .options-grid { grid-template-columns: repeat(3, 1fr); }
  .apply-methods { grid-template-columns: 1fr; max-width: 480px; }

  .curriculum-timeline::before { left: 24px; }
  .curriculum-week { grid-template-columns: 1fr; gap: 20px; padding-left: 56px; }
  .curriculum-week__marker { padding-top: 0; flex-direction: row; align-items: baseline; gap: 12px; }
  .curriculum-week__num { flex-direction: row; align-items: baseline; gap: 12px; }
  .curriculum-week__num strong { font-size: 32px; margin-top: 0; }
  .curriculum-week__dot { left: -42px; right: auto; top: 8px; }
  .curriculum-week__body { padding-top: 0; }

  .md-only { display: inline; }
}

@media screen and (max-width: 768px) {
  .ai-hero { padding: 160px 0 100px; }
  .ai-hero__price-block { padding: 24px 32px; }
  .worry-list { padding: 16px 24px; }
  .worry-item { font-size: var(--fs-md); gap: 16px; padding: 20px 0; }
  .worry-item__check { width: 26px; height: 26px; font-size: 13px; }
  .chat-card { padding: 56px 28px; }

  .deliverables-grid { grid-template-columns: 1fr 1fr; }
  .experience-grid { grid-template-columns: 1fr; }
  .options-grid { grid-template-columns: 1fr 1fr; }

  .program-summary { padding: 8px 24px; }
  .program-summary__row { grid-template-columns: 90px 1fr; padding: 16px 0; }
  .program-summary__row dd strong { font-size: 22px; }
}

@media screen and (max-width: 480px) {
  .ai-hero__title-en { font-size: 14px; letter-spacing: 0.3em; }
  .ai-hero__title { font-size: 38px; letter-spacing: 0.08em; word-break: keep-all; }
  .ai-hero__tag { font-size: 12px; letter-spacing: 0.08em; padding: 0 10px; }
  .ai-hero__lead { font-size: var(--fs-base); }
  .feature-card { padding: 40px 28px; }
  .deliverable-card { padding: 32px 16px; }
  .deliverable-card__num { font-size: 32px; }
}