:root {
  --bg-base: #0a0f1e;
  --bg-mid: #0d1f3c;
  --accent: #F5C842;
  --accent-dark: #c9a020;
  --text: #ffffff;
  --text-sub: #a0b0c8;
  --text-dark: #0a0f1e;
  --border: rgba(245, 200, 66, 0.2);
  --card-bg: rgba(13, 31, 60, 0.8);
  --section-pad: 96px 24px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', sans-serif;
  background: var(--bg-base);
  color: var(--text);
  line-height: 1.8;
  overflow-x: hidden;
}

/* ─── HEADER ─── */
header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 16px 24px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(10, 15, 30, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 1.1rem; font-weight: 700; letter-spacing: 0.15em;
  color: var(--accent);
  text-decoration: none;
}

.header-cta {
  display: inline-block;
  background: var(--accent); color: var(--text-dark);
  font-weight: 700; font-size: 0.85rem;
  padding: 10px 20px; border-radius: 4px;
  text-decoration: none; letter-spacing: 0.05em;
  transition: background 0.2s, transform 0.1s;
  white-space: nowrap;
}
.header-cta:hover { background: var(--accent-dark); transform: translateY(-1px); }

/* ─── PROGRESS BAR ─── */
#progress-bar {
  position: fixed; top: 0; left: 0; height: 3px;
  background: var(--accent); width: 0%; z-index: 200;
  transition: width 0.1s linear;
}

/* ─── HERO ─── */
#hero {
  min-height: 100vh;
  padding: 140px 24px 96px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(160deg, var(--bg-base) 0%, var(--bg-mid) 60%, #0a1a30 100%);
  position: relative; overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(245, 200, 66, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: 860px; width: 100%; text-align: center; position: relative;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.78rem; font-weight: 500; letter-spacing: 0.2em;
  color: var(--accent); text-transform: uppercase;
  border: 1px solid var(--border);
  padding: 6px 16px; border-radius: 40px; margin-bottom: 32px;
}

.hero-title {
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  font-weight: 900; line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
}

.hero-title .accent { color: var(--accent); }

.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-sub); line-height: 1.9;
  max-width: 640px; margin: 0 auto 48px;
}

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

.btn-primary {
  display: inline-block;
  background: var(--accent); color: var(--text-dark);
  font-weight: 900; font-size: 1.05rem; letter-spacing: 0.05em;
  padding: 18px 48px; border-radius: 6px;
  text-decoration: none;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 8px 32px rgba(245, 200, 66, 0.3);
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(245, 200, 66, 0.45);
}

.hero-price {
  font-size: 0.9rem; color: var(--text-sub);
}
.hero-price strong { color: var(--text); font-size: 1.1rem; }

.hero-stats {
  display: flex; justify-content: center; gap: 48px;
  margin-top: 72px; padding-top: 48px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap; gap: 32px;
}

.stat { text-align: center; }
.stat-num {
  display: block; font-size: 2rem; font-weight: 900; color: var(--accent);
  letter-spacing: -0.02em; line-height: 1;
}
.stat-label {
  display: block; font-size: 0.78rem; color: var(--text-sub);
  margin-top: 6px; letter-spacing: 0.08em;
}

/* ─── SECTIONS COMMON ─── */
section { padding: var(--section-pad); }
.section-inner { max-width: 860px; margin: 0 auto; }

.section-label {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.25em;
  color: var(--accent); text-transform: uppercase; margin-bottom: 16px;
  display: block;
}

.section-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 900; line-height: 1.35; margin-bottom: 24px;
}

.section-body {
  font-size: 1rem; color: var(--text-sub); line-height: 1.9;
  max-width: 680px;
}

/* ─── PROBLEM ─── */
#problem {
  background: linear-gradient(180deg, var(--bg-base) 0%, #08121e 100%);
}

.problem-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px; margin-top: 56px;
}

.problem-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px; padding: 32px 28px;
  position: relative; overflow: hidden;
}

.problem-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.problem-num {
  font-size: 2.4rem; font-weight: 900; color: rgba(245, 200, 66, 0.15);
  line-height: 1; margin-bottom: 12px; display: block;
}

.problem-card h3 {
  font-size: 1rem; font-weight: 700; margin-bottom: 10px;
}
.problem-card p { font-size: 0.9rem; color: var(--text-sub); }

/* ─── SOLUTION ─── */
#solution {
  background: linear-gradient(180deg, #08121e 0%, var(--bg-mid) 100%);
}

.solution-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; margin-top: 56px; align-items: start;
}

.solution-points { display: flex; flex-direction: column; gap: 20px; }

.solution-point {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 20px 24px;
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px;
}

.solution-icon {
  width: 36px; height: 36px; flex-shrink: 0;
  background: rgba(245, 200, 66, 0.12);
  border-radius: 8px; display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: 1.1rem;
}

.solution-point h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 4px; }
.solution-point p { font-size: 0.85rem; color: var(--text-sub); }

.solution-quote {
  background: linear-gradient(135deg, rgba(245, 200, 66, 0.08), rgba(245, 200, 66, 0.02));
  border: 1px solid var(--border); border-left: 4px solid var(--accent);
  border-radius: 12px; padding: 40px 36px;
  font-size: 1.1rem; line-height: 1.9; color: var(--text-sub);
  position: sticky; top: 100px;
}

.solution-quote strong { color: var(--text); }

@media (max-width: 700px) {
  .solution-grid { grid-template-columns: 1fr; }
  .solution-quote { position: static; }
}

/* ─── CONTENTS ─── */
#contents {
  background: var(--bg-base);
}

.chapter-list {
  display: flex; flex-direction: column; gap: 2px;
  margin-top: 56px;
}

.chapter {
  display: flex; gap: 20px; align-items: flex-start;
  padding: 24px 28px;
  background: var(--card-bg); border: 1px solid transparent;
  border-radius: 8px;
  transition: border-color 0.2s, background 0.2s;
  cursor: default;
}

.chapter:hover {
  border-color: var(--border);
  background: rgba(13, 31, 60, 0.95);
}

.chapter-num {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.15em;
  color: var(--accent); white-space: nowrap; margin-top: 4px;
  min-width: 60px;
}

.chapter-content h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.chapter-content p { font-size: 0.84rem; color: var(--text-sub); line-height: 1.7; }

.contents-meta {
  display: flex; gap: 32px; margin-top: 48px;
  padding: 32px; background: var(--card-bg);
  border: 1px solid var(--border); border-radius: 12px;
  flex-wrap: wrap;
}

.meta-item { display: flex; flex-direction: column; gap: 4px; }
.meta-item span:first-child {
  font-size: 0.75rem; color: var(--text-sub); letter-spacing: 0.1em;
}
.meta-item span:last-child { font-size: 1.05rem; font-weight: 700; }

/* ─── BEFORE/AFTER ─── */
#transformation {
  background: linear-gradient(180deg, var(--bg-base) 0%, #06101c 100%);
}

.ba-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 32px; margin-top: 56px;
}

.ba-card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 12px; padding: 36px 32px;
}

.ba-card.after { border-color: rgba(245, 200, 66, 0.4); }

.ba-label {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.2em;
  margin-bottom: 24px; display: block;
}

.ba-card.before .ba-label { color: var(--text-sub); }
.ba-card.after .ba-label { color: var(--accent); }

.ba-list { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.ba-list li {
  font-size: 0.9rem; line-height: 1.7;
  display: flex; gap: 10px; align-items: flex-start;
}
.ba-list li::before {
  content: '—'; flex-shrink: 0; margin-top: 2px;
}
.ba-card.before .ba-list li { color: var(--text-sub); }
.ba-card.after .ba-list li { color: var(--text); }
.ba-card.after .ba-list li::before { content: '→'; color: var(--accent); }

@media (max-width: 600px) {
  .ba-grid { grid-template-columns: 1fr; }
}

/* ─── CTA SECTION ─── */
#cta {
  background: linear-gradient(160deg, #06101c 0%, var(--bg-mid) 50%, #0a0f1e 100%);
  text-align: center;
}

.cta-box {
  max-width: 640px; margin: 0 auto;
  background: linear-gradient(135deg, rgba(245, 200, 66, 0.06), rgba(13, 31, 60, 0.9));
  border: 1px solid rgba(245, 200, 66, 0.3);
  border-radius: 20px; padding: 64px 48px;
}

.cta-title {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 900; line-height: 1.4; margin-bottom: 16px;
}

.cta-sub { font-size: 0.95rem; color: var(--text-sub); margin-bottom: 40px; }

.cta-price-block { margin-bottom: 32px; }
.cta-price {
  font-size: 2.6rem; font-weight: 900; color: var(--accent);
  line-height: 1; display: block;
}
.cta-price-note { font-size: 0.8rem; color: var(--text-sub); margin-top: 6px; }

.btn-primary-lg {
  display: inline-block;
  background: var(--accent); color: var(--text-dark);
  font-weight: 900; font-size: 1.15rem; letter-spacing: 0.03em;
  padding: 22px 56px; border-radius: 8px;
  text-decoration: none; width: 100%; max-width: 400px;
  transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
  box-shadow: 0 8px 40px rgba(245, 200, 66, 0.35);
}
.btn-primary-lg:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 48px rgba(245, 200, 66, 0.5);
}

.cta-note { font-size: 0.8rem; color: var(--text-sub); margin-top: 20px; }

@media (max-width: 560px) {
  .cta-box { padding: 40px 24px; }
}

/* ─── FAQ ─── */
#faq {
  background: var(--bg-base);
}

.faq-list { margin-top: 56px; display: flex; flex-direction: column; gap: 2px; }

.faq-item {
  border: 1px solid var(--border); border-radius: 8px; overflow: hidden;
  background: var(--card-bg);
}

.faq-q {
  width: 100%; background: none; border: none; color: var(--text);
  font-family: inherit; font-size: 0.95rem; font-weight: 700;
  text-align: left; padding: 24px 28px;
  display: flex; justify-content: space-between; align-items: center;
  cursor: pointer; gap: 16px;
}

.faq-q .icon {
  flex-shrink: 0; width: 24px; height: 24px;
  background: rgba(245, 200, 66, 0.12); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: 1rem; font-weight: 300;
  transition: transform 0.3s;
}

.faq-item.open .faq-q .icon { transform: rotate(45deg); }

.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 28px;
  font-size: 0.9rem; color: var(--text-sub); line-height: 1.85;
}

.faq-item.open .faq-a {
  max-height: 400px;
  padding: 0 28px 24px;
}

/* ─── FOOTER ─── */
footer {
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--border);
  font-size: 0.78rem; color: var(--text-sub);
}

footer a { color: var(--text-sub); text-decoration: underline; }

/* ─── ANIMATIONS ─── */
.fade-up {
  opacity: 0; transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  :root { --section-pad: 72px 20px; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 1.6rem; }
  .chapter { flex-direction: column; gap: 8px; }
  .chapter-num { margin-top: 0; }
  .contents-meta { gap: 20px; }
  header { padding: 14px 20px; }
}