/* ============================================================
   page-dx.css — 伴走型DX開発 LP
   B.I.Y Corporate Design System
   ============================================================ */

/* ── Hero ──────────────────────────────────────────────── */
.dx-hero {
  position: relative;
  background-color: var(--color-navy);
  color: var(--color-white);
  padding: 200px 0 130px;
  overflow: hidden;
  text-align: center;
}
.dx-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 70% 50% at 50% 35%, rgba(200, 168, 74, 0.13) 0%, transparent 60%),
    linear-gradient(180deg, transparent 0%, rgba(8, 20, 39, 0.5) 100%);
  pointer-events: none;
}
.dx-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%);
}
.dx-hero__inner { position: relative; z-index: 2; }

.dx-hero__tag {
  display: inline-block;
  padding: 0 16px;
  margin-bottom: 40px;
  font-family: var(--font-serif-en);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold);
  position: relative;
  font-weight: var(--fw-medium);
}
.dx-hero__tag::before,
.dx-hero__tag::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 48px;
  height: 1px;
  background: var(--color-gold-line);
}
.dx-hero__tag::before { right: 100%; }
.dx-hero__tag::after  { left: 100%; }

.dx-hero__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: 18px;
}
.dx-hero__title {
  font-family: var(--font-serif-ja);
  font-size: clamp(42px, 6.6vw, 78px);
  line-height: 1.25;
  letter-spacing: 0.16em;
  color: var(--color-white);
  font-weight: var(--fw-bold);
  margin-bottom: 28px;
}
.dx-hero__subtitle {
  font-family: var(--font-serif-ja);
  font-size: clamp(16px, 2vw, 22px);
  color: rgba(255, 255, 255, 0.78);
  letter-spacing: 0.12em;
  line-height: 1.6;
  margin-bottom: 48px;
}
.dx-hero__lead {
  font-size: var(--fs-md);
  line-height: 2.2;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 56px;
  letter-spacing: 0.06em;
}
.dx-hero__lead strong { color: var(--color-gold); font-weight: var(--fw-bold); }

/* Hero price (dual) */
.dx-hero__price {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  padding: 32px 48px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(200, 168, 74, 0.3);
  position: relative;
  margin-bottom: 14px;
}
.dx-hero__price::before,
.dx-hero__price::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 1px solid var(--color-gold);
}
.dx-hero__price::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.dx-hero__price::after  { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.dx-hero__price-item { display: flex; flex-direction: column; align-items: center; }
.dx-hero__price-label {
  font-family: var(--font-sans-ja);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wider);
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 8px;
}
.dx-hero__price-value {
  font-family: var(--font-serif-en);
  font-size: clamp(34px, 5vw, 52px);
  color: var(--color-white);
  font-weight: var(--fw-semibold);
  line-height: 1;
  letter-spacing: 0.02em;
}
.dx-hero__yen { font-size: 0.5em; color: var(--color-gold); margin-right: 2px; }
.dx-hero__price-value small {
  font-family: var(--font-sans-ja);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-left: 4px;
  font-weight: var(--fw-regular);
}
.dx-hero__price-plus { font-family: var(--font-serif-en); font-size: 28px; color: var(--color-gold); }
.dx-hero__price-note {
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: var(--tracking-wide);
  margin-bottom: 56px;
}

.dx-hero__cta { display: flex; flex-direction: column; align-items: center; gap: 26px; }

/* hero secondary text link (page-dx scope) */
.hero__text-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-sans-ja);
  font-size: var(--fs-sm);
  color: var(--color-white);
  letter-spacing: var(--tracking-wider);
  padding: 8px 4px;
  position: relative;
  transition: color var(--transition-base);
}
.hero__text-link::before {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 2px;
  height: 1px;
  background: rgba(255, 255, 255, 0.5);
  transition: background var(--transition-base);
}
.hero__text-link span { font-family: var(--font-sans-en); transition: transform var(--transition-base); }
.hero__text-link:hover { color: var(--color-gold); }
.hero__text-link:hover::before { background: var(--color-gold); }
.hero__text-link:hover span { transform: translateX(6px); }

/* ── Shared section heading (DX) ───────────────────────── */
.dx-section-heading {
  font-family: var(--font-serif-ja);
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.1em;
  line-height: 1.4;
  margin-bottom: 56px;
}
.dx-section-heading span { color: var(--color-gold); }
.dx-section-heading--light { color: var(--color-white); }

/* ── Price Revolution（対比） ──────────────────────────── */
.dx-revolution__heading {
  font-family: var(--font-serif-ja);
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: var(--fw-bold);
  color: var(--color-navy);
  letter-spacing: 0.1em;
  line-height: 1.4;
  margin-bottom: 56px;
}

.dx-compare {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 20px;
  margin-bottom: 48px;
}
.dx-compare__col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 28px;
  border: 1px solid var(--color-border-soft);
  background: var(--color-white);
}
.dx-compare__col--old { opacity: 0.85; }
.dx-compare__col--new {
  background: var(--color-navy);
  border-color: var(--color-navy);
  position: relative;
}
.dx-compare__col--new::before,
.dx-compare__col--new::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1px solid var(--color-gold);
}
.dx-compare__col--new::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.dx-compare__col--new::after  { bottom: -1px; right: -1px; border-left: none; border-top: none; }

.dx-compare__label {
  font-family: var(--font-sans-ja);
  font-size: var(--fs-sm);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-muted);
  margin-bottom: 20px;
}
.dx-compare__col--new .dx-compare__label { color: var(--color-gold); }

.dx-compare__price {
  font-family: var(--font-serif-en);
  font-size: clamp(34px, 5vw, 52px);
  font-weight: var(--fw-semibold);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.dx-compare__price small {
  font-family: var(--font-sans-ja);
  font-size: 15px;
  font-weight: var(--fw-medium);
}
.dx-compare__col--old .dx-compare__price {
  color: var(--color-text-light);
  text-decoration: line-through;
  text-decoration-color: var(--color-danger);
  text-decoration-thickness: 2px;
}
.dx-compare__col--new .dx-compare__price { color: var(--color-white); }
.dx-compare__col--new .dx-compare__price small { color: rgba(255,255,255,0.7); }

.dx-compare__sub {
  margin-top: 16px;
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-muted);
}
.dx-compare__col--new .dx-compare__sub { color: rgba(255, 255, 255, 0.6); }

.dx-compare__arrow {
  display: flex;
  align-items: center;
  font-family: var(--font-sans-en);
  font-size: 28px;
  color: var(--color-gold);
}

.dx-revolution__text {
  font-size: var(--fs-md);
  line-height: 2.1;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

/* ── Build grid（作れるもの） ──────────────────────────── */
.dx-build-headline {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: end;
  margin-bottom: 64px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-border-soft);
}
.dx-build-headline .dx-section-heading { margin-bottom: 0; }
.dx-build-lead {
  font-size: var(--fs-md);
  line-height: 2.1;
  color: var(--color-text-light);
  letter-spacing: 0.05em;
  padding-bottom: 8px;
}
.dx-build-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.dx-build-card {
  background: var(--color-white);
  border: 1px solid var(--color-border-soft);
  padding: 40px 32px;
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.dx-build-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-gold-line);
}
.dx-build-card__num {
  display: block;
  font-family: var(--font-serif-en);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-widest);
  color: var(--color-gold);
  font-weight: var(--fw-medium);
  margin-bottom: 18px;
}
.dx-build-card h3 {
  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;
}
.dx-build-card p {
  font-size: var(--fs-base);
  line-height: 1.9;
  color: var(--color-text-light);
  letter-spacing: 0.04em;
}
.dx-build-note {
  text-align: center;
  margin-top: 48px;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ── Quality（妥協しない） on navy ─────────────────────── */
.dx-quality-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.dx-quality-card {
  padding: 48px 36px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  transition: border-color var(--transition-base), background var(--transition-base);
}
.dx-quality-card:hover { border-color: var(--color-gold); background: rgba(255, 255, 255, 0.05); }
.dx-quality-card__en {
  display: block;
  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: 16px;
  font-weight: var(--fw-medium);
}
.dx-quality-card h3 {
  font-family: var(--font-serif-ja);
  font-size: var(--fs-h3);
  color: var(--color-white);
  letter-spacing: 0.12em;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.dx-quality-card p {
  font-size: var(--fs-base);
  line-height: 2;
  color: rgba(255, 255, 255, 0.78);
  letter-spacing: 0.04em;
}

/* ── Flow ──────────────────────────────────────────────── */
.dx-flow {
  list-style: none;
  position: relative;
  padding: 0;
}
.dx-flow::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: var(--color-gold-line);
}
.dx-flow__step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 28px;
  align-items: start;
  padding: 24px 0;
  position: relative;
}
.dx-flow__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-navy);
  color: var(--color-white);
  font-family: var(--font-serif-en);
  font-size: 18px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  position: relative;
  z-index: 1;
}
.dx-flow__step h3 {
  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: 8px;
  padding-top: 12px;
}
.dx-flow__step p {
  font-size: var(--fs-base);
  line-height: 1.9;
  color: var(--color-text-light);
  letter-spacing: 0.04em;
}

/* ── Price table ───────────────────────────────────────── */
.dx-price-table {
  background: var(--color-bg-cream);
  border: 1px solid var(--color-border-soft);
  padding: 8px 48px;
}
.dx-price-table__row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 32px;
  align-items: baseline;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border-soft);
}
.dx-price-table__row:last-child { border-bottom: none; }
.dx-price-table__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;
}
.dx-price-table__row dt::before {
  content: "";
  position: absolute;
  left: 0; top: 12px;
  width: 8px; height: 1px;
  background: var(--color-gold);
}
.dx-price-table__row dd {
  font-size: var(--fs-base);
  color: var(--color-text);
  line-height: 1.9;
  letter-spacing: 0.04em;
}
.dx-price-table__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;
}
.dx-price-table__row dd span { font-size: var(--fs-sm); color: var(--color-text-muted); }
.dx-price-note {
  margin-top: 32px;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.9;
  letter-spacing: 0.04em;
}

/* ── CTA ───────────────────────────────────────────────── */
.dx-cta-section { scroll-margin-top: 80px; }
.dx-cta__headline { text-align: center; margin-bottom: 56px; }
.dx-cta__title {
  font-family: var(--font-serif-ja);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: var(--fw-bold);
  color: var(--color-white);
  letter-spacing: 0.08em;
  line-height: 1.5;
  margin-bottom: 28px;
}
.dx-cta__title span { color: var(--color-gold); }
.dx-cta__lead {
  font-size: var(--fs-md);
  line-height: 2.1;
  color: rgba(255, 255, 255, 0.72);
  letter-spacing: 0.05em;
}
.dx-cta__methods {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 760px;
  margin: 0 auto;
}
.dx-cta__method {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 28px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  transition: border-color var(--transition-base), background var(--transition-base);
}
.dx-cta__method:hover { border-color: var(--color-gold); background: rgba(255, 255, 255, 0.06); }
.dx-cta__method--form { background: rgba(200, 168, 74, 0.1); border-color: rgba(200, 168, 74, 0.4); }
.dx-cta__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: 14px;
}
.dx-cta__method-value {
  font-family: var(--font-serif-en);
  font-size: 24px;
  color: var(--color-white);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}
.dx-cta__method-sub {
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: var(--tracking-wide);
}

/* ── Responsive ────────────────────────────────────────── */
@media screen and (max-width: 992px) {
  .dx-build-headline { grid-template-columns: 1fr; gap: 24px; }
  .dx-build-grid { grid-template-columns: repeat(2, 1fr); }
  .dx-quality-grid { grid-template-columns: 1fr; gap: 20px; }
}

@media screen and (max-width: 768px) {
  .dx-hero { padding: 160px 0 100px; }
  .dx-hero__price { flex-direction: column; gap: 16px; padding: 28px 32px; }
  .dx-hero__price-plus { transform: rotate(90deg); }
  .dx-hero__cta .btn { width: 100%; max-width: 340px; }

  .dx-compare { grid-template-columns: 1fr; }
  .dx-compare__arrow { transform: rotate(90deg); justify-content: center; padding: 4px 0; }

  .dx-build-grid { grid-template-columns: 1fr; }
  .dx-price-table { padding: 4px 28px; }
  .dx-price-table__row { grid-template-columns: 1fr; gap: 8px; padding: 20px 0; }
  .dx-cta__methods { grid-template-columns: 1fr; }
}