/* ============================================================
   RESET & BASE
============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --ink: #2b2b10;
  --paper: #ffffff;
  --accent: #c8451a;
  --mid: #6b6560;
  --line: #d4cfc7;
  --white: #fdfcfa;
  --dark: #141411; /* 真っ黒より少し柔らかい */
  --dark-2: #1b1b16;

  --font-sans:
    system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;

  --text-base: 18px;
  --text-small: 16px;

  --radius: 14px;
  --radius-lg: 18px;
}

html {
  scroll-behavior: smooth;
  font-size: var(--text-base);
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.85;
  overflow-x: hidden;
}

p,
li {
  font-size: 1rem;
}
small,
.small,
.muted,
.note {
  font-size: var(--text-small);
  line-height: 1.75;
}

/* ============================================================
   GLOBAL NAV
============================================================ */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  mix-blend-mode: multiply;
}

.nav-logo {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
}

.nav-cta {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: opacity 0.2s;
}
.nav-cta:hover { opacity: 0.6; }

/* ============================================================
   HERO
============================================================ */
#hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  position: relative;
  overflow: hidden;
}

.hero-left {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 120px 56px 80px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--mid);
  margin-bottom: 36px;
  text-transform: uppercase;
}

.hero-copy {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.hero-copy .price {
  display: block;
  font-size: clamp(3.6rem, 9vw, 7rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--accent);
  margin-bottom: 6px;
  font-weight: 900;
}

.price-sub {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--mid);
  margin-left: 10px;
}

.hero-copy .line2 { display: block; margin-bottom: 8px; }
.hero-copy .line3 { display: block; }

.hero-sub {
  margin-top: 40px;
  font-size: 1rem;
  color: var(--mid);
  max-width: 360px;
  line-height: 2;
}

.hero-right { position: relative; overflow: hidden; }

/* 縦ストライプ — 装飾 */
.hero-stripe {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: stretch;
}

.stripe {
  flex: 1;
  opacity: 0.08;
  background: var(--ink);
  transform: skewX(-2deg);
  transform-origin: bottom;
}
.stripe:nth-child(2) { background: var(--accent); opacity: 0.06; }
.stripe:nth-child(3) { background: var(--ink); }

/* 大きなアクセント数字 */
.hero-bg-num {
  position: absolute;
  bottom: -60px;
  right: -20px;
  font-size: 28vw;
  color: var(--ink);
  opacity: 0.04;
  line-height: 1;
  pointer-events: none;
  user-select: none;
  font-weight: 900;
}

/* ルーラー横線 */
.hero-rule {
  position: absolute;
  bottom: 80px;
  left: 56px;
  width: 60px;
  height: 2px;
  background: var(--accent);
  border-radius: 999px;
}

/* スクロールヒント */
.scroll-hint {
  position: absolute;
  bottom: 36px;
  right: 40px;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--mid);
  writing-mode: vertical-rl;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}
.scroll-hint::before {
  content: "";
  display: block;
  width: 1px;
  height: 48px;
  background: var(--mid);
  animation: scrollLine 1.8s ease infinite;
  transform-origin: top;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); opacity: 0; }
  40% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

/* ============================================================
   HERO MOCK
============================================================ */
.hero-mock {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px;
  z-index: 2;
  pointer-events: none;
}

.hero-mock img {
  width: min(360px, 75%);
  height: auto;
  border-radius: 28px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.25);
  transform: translateY(8px);
}

/* モバイルでは hero-right が消えるので、hero-left内に出す */
.hero-mock--mobile {
  display: none;
  position: relative;
  inset: auto;
  padding: 0;
  margin-top: 26px;
  justify-content: flex-start;
  pointer-events: none;
}
.hero-mock--mobile img { width: min(340px, 100%); }

/* ============================================================
   SECTION BASE
============================================================ */
section { position: relative; }

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--mid);
  text-transform: uppercase;
  margin-bottom: 56px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.section-label::after {
  content: "";
  display: block;
  height: 1px;
  width: 48px;
  background: var(--mid);
  opacity: 0.5;
}

/* ============================================================
   WHY
============================================================ */
#why {
  padding: 160px 0;
  background: var(--dark);
  color: var(--paper);
}

#why .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

#why .section-label { color: rgba(244, 241, 235, 0.55); }
#why .section-label::after { background: rgba(244, 241, 235, 0.3); }

.why-heading {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.45;
}
.why-heading em { font-style: normal; color: var(--accent); }

.why-blocks { display: flex; flex-direction: column; gap: 0; }

.why-item {
  padding: 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  align-items: start;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.why-item.visible { opacity: 1; transform: translateY(0); }
.why-item:last-child { border-bottom: 1px solid rgba(244, 241, 235, 0.12); }

.why-num {
  font-size: 3rem;
  color: var(--accent);
  line-height: 1;
  padding-top: 4px;
  font-weight: 900;
}
.why-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.why-body {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 2;
}

/* ============================================================
   REALITY
============================================================ */
#reality {
  padding: 160px 0;
  background: var(--white);
}

#reality .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 56px;
}

#reality .section-label { margin-bottom: 72px; }

.reality-heading {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 72px;
  line-height: 1.45;
}

.reality-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.reality-card {
  background: var(--white);
  border: 1px solid rgba(15, 15, 13, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 24px rgba(15, 15, 13, 0.06);
  padding: 48px 36px;

  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reality-card.visible { opacity: 1; transform: translateY(0); }
.reality-card:nth-child(2) { transition-delay: 0.15s; }
.reality-card:nth-child(3) { transition-delay: 0.3s; }

.rc-tag {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 22px;
  display: block;
}

.rc-num {
  font-size: 3.2rem;
  line-height: 1;
  color: var(--ink);
  margin-bottom: 6px;
  font-weight: 900;
}

.rc-unit { font-size: 1rem; margin-left: 4px; vertical-align: middle; }

.rc-title {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.6;
}

.rc-body {
  font-size: 1rem;
  color: var(--mid);
  line-height: 2;
}

/* ============================================================
   PRICE
============================================================ */
#price {
  padding: 160px 0;
  background: var(--paper);
  overflow: hidden;
}

#price .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 56px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.price-left .section-label { margin-bottom: 42px; }

.price-heading {
  font-size: clamp(1.7rem, 2.8vw, 2.2rem);
  font-weight: 800;
  line-height: 1.55;
  margin-bottom: 24px;
}

.price-note {
  font-size: 1rem;
  color: var(--mid);
  line-height: 2;
}

.price-card {
  background: var(--ink);
  color: var(--paper);
  padding: 56px 48px;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: 0 14px 32px rgba(15, 15, 13, 0.1);
}

.price-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.1;
}

.price-row {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(244, 241, 235, 0.12);
}
.price-row:last-of-type { margin-bottom: 32px; }

.price-label {
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: rgba(244, 241, 235, 0.55);
  white-space: nowrap;
  width: 90px;
  flex-shrink: 0;
  font-weight: 700;
}

.price-amount {
  font-size: 2.8rem;
  line-height: 1;
  color: var(--paper);
  font-weight: 900;
}
.price-amount sub {
  font-size: 0.85rem;
  font-weight: 600;
  vertical-align: middle;
  letter-spacing: 0.02em;
  opacity: 0.75;
}

.price-badge {
  display: inline-block;
  border: 1px solid rgba(244, 241, 235, 0.22);
  padding: 10px 18px;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: rgba(244, 241, 235, 0.7);
  border-radius: 999px;
}

/* ============================================================
   FAQ
============================================================ */
#faq {
  padding: 120px 0;
  background: #f6f6f4;
}

#faq .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 56px;
}

#faq .reality-heading {
  margin-bottom: 28px; /* FAQはカードが続くので、見出しの下余白だけ軽めに */
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 18px;
}

.faq-card {
  border: 1px solid rgba(0, 0, 0, 0.10);      /* 微強化 */
  background: rgba(255, 255, 255, 0.7);
  border-radius: 16px;
  padding: 16px 18px;
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.05); /* 微強化 */
}

.faq-q {
  font-size: 16px;
  line-height: 1.5;
  margin: 0 0 8px;
  letter-spacing: 0.01em;
}

.faq-a {
  margin: 0;
  color: rgba(0, 0, 0, 0.72);
  font-size: 14.5px;
  line-height: 1.85;
}

@media (min-width: 768px) {
  .faq-card { padding: 18px 22px; }
  .faq-q { font-size: 17px; }
  .faq-a { font-size: 15px; }
}

/* ============================================================
   CTA
============================================================ */
#cta {
  padding: 160px 0 120px;
  background: var(--accent);
  overflow: hidden;
  position: relative;
}

.cta-bg-text {
  position: absolute;
  bottom: -40px;
  left: -10px;
  font-size: 22vw;
  color: rgba(0, 0, 0, 0.06);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
  font-weight: 900;
}

#cta .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 56px;
  position: relative;
  z-index: 2;
}

.cta-heading {
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.35;
  margin-bottom: 56px;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 28px;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s ease;
  border: none;
  outline: none;
  border-radius: var(--radius);
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
}
.btn-primary:hover {
  background: var(--white);
  color: var(--ink);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.45);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.75);
}

.btn-arrow::after {
  content: "→";
  font-size: 1.1rem;
  transition: transform 0.2s;
}
.btn-arrow:hover::after { transform: translateX(4px); }

.cta-micro {
  margin-top: 18px;
  font-size: 0.98rem;
  color: rgba(253, 252, 250, 0.86);
  letter-spacing: 0.03em;
}

.cta-sub {
  margin-top: 40px;
  font-size: var(--text-small);
  color: rgba(253, 252, 250, 0.7);
  letter-spacing: 0.04em;
}

/* ============================================================
   FOOTER（※二重定義を統合）
============================================================ */
footer {
  background: #111;
  color: rgba(255, 255, 255, 0.6);
  padding: 40px 56px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}

.footer-logo {
  font-weight: 700;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
}

footer .links {
  display: flex;
  gap: 24px;
}
footer .links a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 13px;
  transition: opacity 0.2s ease;
}
footer .links a:hover { opacity: 0.8; }

footer span {
  font-size: 12px;
  opacity: 0.5;
}

/* ============================================================
   FADE-IN (JS-driven)
============================================================ */
.fade-target {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-target.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 900px) {
  nav { padding: 18px 18px; }

  #hero {
    grid-template-columns: 1fr;
    min-height: 100svh;
  }
  .hero-left { padding: 110px 18px 70px; }
  .hero-right { display: none; }
  .scroll-hint { display: none; }
  .hero-rule { left: 18px; }
  .hero-mock--mobile { display: flex; }

  #why .inner,
  #price .inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 0 18px;
  }

  #reality .inner { padding: 0 18px; }
  .reality-grid { grid-template-columns: 1fr; }

  /* FAQは padding だけ合わせる（grid系は不要） */
  #faq .inner { padding: 0 18px; }

  #cta .inner { padding: 0 18px; }

  .cta-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  .btn { width: 100%; justify-content: center; }

  #why,
  #reality,
  #price,
  #faq,
  #cta {
    padding: 96px 0;
  }

  footer {
    flex-direction: column;
    gap: 14px;
    text-align: center;
    padding: 40px 18px;
  }
}

/* ============================================================
   HOVER UNDERLINE SUBTLE
============================================================ */
.hover-line {
  position: relative;
  display: inline-block;
}
.hover-line::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}
.hover-line:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}