/* ===========================
   NAGI AI - Landing Page CSS
   和ゴールド × 競艇 × 勝負師
   =========================== */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary: #050510;
  --bg-secondary: #0a0a1a;
  --bg-card: #0f0f1f;
  --bg-card-hover: #14142a;
  --bg-highlight: #1a1a2e;
  --text-primary: #f0e6d0;
  --text-secondary: #a89878;
  --text-muted: #6b5e48;
  --gold: #FFD700;
  --gold-dark: #B8860B;
  --gold-dim: #DAA520;
  --gold-glow: rgba(255, 215, 0, 0.12);
  --gold-glow-strong: rgba(255, 215, 0, 0.25);
  --red: #DC143C;
  --red-glow: rgba(220, 20, 60, 0.15);
  --green: #06C755;
  --green-dark: #05b34c;
  --border: #2a2218;
  --border-light: #3d3020;
  --font-ja: 'Zen Kaku Gothic New', sans-serif;
  --font-en: 'Inter', sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-gold: 0 0 40px rgba(255, 215, 0, 0.08);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1100px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-ja);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }
a { color: var(--gold); text-decoration: none; transition: var(--transition); }
a:hover { color: #ffe44d; }
strong { color: var(--text-primary); font-weight: 700; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.sp-only { display: none; }
@media (max-width: 768px) { .sp-only { display: inline; } }

/* --- Utility --- */
.text-accent { color: var(--gold); }
.text-red { color: var(--red); }
.text-muted { color: var(--text-muted); }

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(5, 5, 16, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo a { text-decoration: none; }
.logo-text {
  font-family: var(--font-en);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--gold);
  letter-spacing: 0.02em;
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}
.logo-accent { color: var(--red); }

.nav-menu {
  display: flex;
  list-style: none;
  gap: 32px;
}
.nav-menu a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}
.nav-menu a:hover { color: var(--gold); }

.nav-menu-cta { display: none; }

.nav-cta { display: flex; gap: 8px; }

.hamburger { display: none; cursor: pointer; flex-direction: column; gap: 5px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--gold); transition: var(--transition); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-ja);
  font-size: 0.9375rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}
.btn-sm { padding: 8px 20px; font-size: 0.8125rem; }
.btn-lg { padding: 16px 36px; font-size: 1rem; }

.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #050510;
  box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #ffe44d, var(--gold));
  color: #050510;
  box-shadow: 0 6px 24px rgba(255, 215, 0, 0.45);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--gold-dark);
}
.btn-outline:hover {
  border-color: var(--gold);
  background: var(--gold-glow);
  color: var(--gold);
}

.btn-icon-left { width: 20px; height: 20px; flex-shrink: 0; }

/* --- Section --- */
.section {
  padding: 100px 0;
  position: relative;
}
.section-dark {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gold);
  background: var(--gold-glow);
  border: 1px solid rgba(255, 215, 0, 0.2);
  padding: 4px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.4;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.badge-update {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--gold);
  background: var(--gold-glow);
  border: 1px solid rgba(255, 215, 0, 0.3);
  border-radius: 100px;
  padding: 4px 12px;
  margin-left: 12px;
  vertical-align: middle;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
  background: var(--bg-primary);
}

/* Hero background - banner image */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/hero-banner.jpeg') center center / cover no-repeat;
  opacity: 0.5;
  filter: saturate(0.85);
}

/* Gold vignette overlay */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, rgba(5,5,16,0.15) 15%, rgba(5,5,16,0.65) 65%),
    linear-gradient(180deg, rgba(5,5,16,0.05) 0%, rgba(5,5,16,0.8) 85%);
}

.hero-bg-grid {
  display: none; /* テックグリッド廃止 */
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--gold);
  background: rgba(255, 215, 0, 0.1);
  border: 1px solid rgba(255, 215, 0, 0.3);
  padding: 6px 20px;
  border-radius: 100px;
  margin-bottom: 32px;
  letter-spacing: 0.05em;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.4;
  margin-bottom: 28px;
  letter-spacing: -0.02em;
  color: #fff;
  text-shadow: 0 2px 40px rgba(255, 215, 0, 0.15);
}

.hero-line { display: block; }

.hero-lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
  font-weight: 500;
}

.hero-description {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 48px;
}

.hero-stats {
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: 40px;
  margin-bottom: 48px;
  padding: 32px 48px;
  background: rgba(15, 15, 31, 0.85);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(8px);
  box-shadow: 0 0 60px rgba(255, 215, 0, 0.05);
}

.stat-item { text-align: center; flex: 1; }
.stat-number {
  display: flex;
  align-items: baseline;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--gold);
  line-height: 1.2;
  min-height: 3rem;
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}
.stat-unit { font-size: 1.5rem; }
.stat-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 48px;
  background: var(--border-light);
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 24px;
}

.hero-disclaimer {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Problem --- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.problem-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
}
.problem-card:hover {
  border-color: var(--red);
  background: var(--bg-card-hover);
  box-shadow: 0 0 30px rgba(220, 20, 60, 0.08);
}

.problem-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--red-glow);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}
.problem-icon svg { width: 24px; height: 24px; color: var(--red); }

.problem-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.problem-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.8;
  flex: 1;
}

/* --- Why Boat Race --- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  align-items: stretch;
}

.why-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
  height: 100%;
}
.why-card:hover {
  border-color: var(--gold-dark);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-gold);
}

.why-number {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 900;
  color: var(--gold);
  line-height: 1;
  min-width: 60px;
  text-align: center;
  flex-shrink: 0;
  padding-top: 4px;
  text-shadow: 0 0 15px rgba(255, 215, 0, 0.3);
}

.why-body h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.why-body p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- Approach --- */
.approach-flow {
  max-width: 720px;
  margin: 0 auto 64px;
}

.approach-stage {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.approach-stage.stage-highlight {
  border-color: var(--gold-dark);
  box-shadow: var(--shadow-gold);
}

.stage-header {
  padding: 28px 32px 0;
}
.stage-number {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gold);
}
.stage-header h3 {
  font-size: 1.375rem;
  font-weight: 900;
  margin-top: 8px;
  color: var(--text-primary);
}
.stage-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  color: #050510;
  background: var(--gold);
  padding: 2px 10px;
  border-radius: 100px;
  margin-left: 12px;
  vertical-align: middle;
}

.stage-body {
  padding: 20px 32px 24px;
}
.stage-description {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-highlight);
  padding: 4px 12px;
  border-radius: 100px;
  border: 1px solid var(--border-light);
}
.tag-more {
  color: var(--gold);
  border-color: rgba(255, 215, 0, 0.3);
  background: var(--gold-glow);
}
.feature-tags-extra {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  width: 100%;
}

.stage-result {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  background: var(--bg-highlight);
  border-top: 1px solid var(--border);
}
.stage-result.result-highlight {
  background: rgba(255, 215, 0, 0.05);
  border-top-color: rgba(255, 215, 0, 0.2);
}
.result-label {
  font-family: var(--font-en);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #050510;
  background: var(--gold);
  padding: 2px 10px;
  border-radius: 100px;
  flex-shrink: 0;
}
.result-value {
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* EV Formula */
.ev-formula {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.formula-block {
  margin-bottom: 16px;
}
.formula-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.formula-eq {
  display: block;
  font-family: var(--font-en);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gold);
  margin-top: 8px;
}
.formula-example {
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 8px 0;
  border-top: 1px solid var(--border);
}
.formula-example + .formula-example { border-top: none; padding-top: 0; }

/* Approach Arrow */
.approach-arrow {
  display: flex;
  justify-content: center;
  padding: 16px 0;
}
.approach-arrow svg { width: 24px; height: 48px; color: var(--gold); }

/* Approach Comparison */
.approach-comparison {
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: 720px;
  margin: 0 auto;
}
.comparison-item {
  flex: 1;
  padding: 28px;
  border-radius: var(--radius);
  text-align: center;
}
.comparison-bad {
  background: var(--red-glow);
  border: 1px solid rgba(220, 20, 60, 0.25);
}
.comparison-good {
  background: var(--gold-glow);
  border: 1px solid rgba(255, 215, 0, 0.3);
}
.comparison-item h4 {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-secondary);
}
.comparison-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.comparison-vs {
  font-family: var(--font-en);
  font-size: 0.875rem;
  font-weight: 900;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* --- Performance --- */
.performance-table-wrap {
  overflow-x: auto;
  margin-bottom: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.performance-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}
.performance-table th {
  background: var(--bg-highlight);
  padding: 14px 20px;
  text-align: left;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}
.th-note {
  font-weight: 400;
  font-size: 0.6875rem;
  display: block;
  text-transform: none;
  letter-spacing: 0;
}
.performance-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  color: var(--text-secondary);
}
.performance-table tr:last-child td { border-bottom: none; }
.performance-table tr.row-highlight {
  background: rgba(255, 215, 0, 0.04);
}
.performance-table tr.row-highlight td { color: var(--text-primary); }

/* Plan group styling */
.plan-group-basic td[rowspan],
.plan-group-standard td[rowspan] {
  vertical-align: middle;
  text-align: center;
  border-left: none;
}

.plan-badge {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.plan-badge-basic {
  color: var(--text-secondary);
  background: rgba(168, 152, 120, 0.12);
  border: 1px solid rgba(168, 152, 120, 0.3);
}
.plan-badge-standard {
  color: var(--gold);
  background: var(--gold-glow);
  border: 1px solid rgba(255, 215, 0, 0.3);
}

.strategy-name {
  font-family: var(--font-en);
  font-weight: 600;
  color: var(--text-primary);
}
.strategy-recommended { color: var(--gold); }
.badge-rec {
  font-size: 0.625rem;
  font-weight: 700;
  background: var(--gold);
  color: #050510;
  padding: 1px 8px;
  border-radius: 100px;
  margin-left: 8px;
  vertical-align: middle;
}
.badge-plan {
  font-size: 0.625rem;
  font-weight: 700;
  background: var(--border-light);
  color: var(--text-secondary);
  padding: 1px 8px;
  border-radius: 100px;
  margin-left: 8px;
  vertical-align: middle;
}
.badge-plan-premium {
  font-size: 0.625rem;
  font-weight: 700;
  background: var(--red);
  color: #fff;
  padding: 1px 8px;
  border-radius: 100px;
  margin-left: 8px;
  vertical-align: middle;
}

.roi-value {
  font-family: var(--font-en);
  font-weight: 700;
  color: var(--gold-dim);
}
.roi-highlight {
  font-size: 1.125rem;
  color: var(--gold);
  text-shadow: 0 0 10px rgba(255, 215, 0, 0.3);
}

.profit {
  font-family: var(--font-en);
  font-weight: 600;
  color: var(--gold-dim);
}

/* Performance Note */
.performance-note {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 32px;
}
.performance-note h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  text-align: center;
  color: var(--text-primary);
}
.simulation-grid {
  display: flex;
  justify-content: center;
  gap: 40px;
}
.sim-item { text-align: center; }
.sim-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}
.sim-value {
  display: block;
  font-family: var(--font-en);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
}
.sim-accent { color: var(--gold); text-shadow: 0 0 10px rgba(255, 215, 0, 0.2); }

.sim-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 20px;
}
.sim-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 16px;
}

.disclaimer {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.8;
}

/* --- Transparency / Promise --- */
.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.promise-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
}
.promise-card:hover {
  border-color: var(--gold-dark);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-gold);
}
.promise-number {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--gold);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 16px;
}
.promise-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.promise-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.8;
  flex: 1;
}

/* --- Pricing --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
  margin-bottom: 24px;
}
.pricing-grid-2col {
  grid-template-columns: repeat(2, 1fr);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}
.pricing-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
}

.pricing-recommended {
  border-color: var(--gold-dark);
  box-shadow: var(--shadow-gold);
  transform: scale(1.03);
}
.pricing-recommended:hover { border-color: var(--gold); }

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  font-weight: 700;
  color: #050510;
  background: var(--gold);
  padding: 4px 20px;
  border-radius: 100px;
}

.pricing-header {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.pricing-header h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 12px;
}
.price-amount {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--gold);
  text-shadow: 0 0 15px rgba(255, 215, 0, 0.2);
}
.price-period {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.pricing-features {
  list-style: none;
  text-align: left;
}
.pricing-features li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 8px 0;
  padding-left: 24px;
  position: relative;
}
.pricing-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 14px;
  height: 14px;
  background: var(--gold-glow);
  border: 1.5px solid var(--gold-dark);
  border-radius: 50%;
}
.pricing-features li.feature-label {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-bottom: 0;
  padding-left: 0;
  margin-top: 8px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.pricing-features li.feature-label:first-child {
  border-top: none;
  margin-top: 0;
}
.pricing-features li.feature-label::before {
  display: none;
}
.pricing-features li.feature-label + li {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}
.pricing-features li.feature-sub {
  font-size: 0.8125rem;
  color: var(--text-muted);
  padding-top: 0;
  padding-left: 24px;
}
.pricing-features li.feature-sub::before {
  display: none;
}

.pricing-note {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
}

/* --- FAQ --- */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:first-child { border-top: 1px solid var(--border); }

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  color: var(--text-primary);
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-family: var(--font-en);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item[open] summary::after {
  content: '−';
  color: var(--gold);
}
.faq-item summary:hover { color: var(--gold); }

.faq-item p {
  padding: 0 0 24px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --- LINE Button --- */
.btn-line {
  background: var(--green);
  color: #fff;
  box-shadow: 0 4px 16px rgba(6, 199, 85, 0.25);
}
.btn-line:hover {
  background: var(--green-dark);
  color: #fff;
  box-shadow: 0 6px 24px rgba(6, 199, 85, 0.35);
  transform: translateY(-1px);
}

/* --- Early Access Section --- */
.section-early {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  padding: 100px 0;
}

.early-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.early-badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #fff;
  background: var(--red);
  padding: 6px 20px;
  border-radius: 100px;
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  box-shadow: 0 0 20px rgba(220, 20, 60, 0.3);
}

.early-inner h2 {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.4;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.early-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.early-benefits {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 40px;
  text-align: left;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 40px;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--text-primary);
  font-weight: 500;
}

.benefit-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.benefit-icon svg {
  width: 24px;
  height: 24px;
  color: var(--gold);
}

.early-cta {
  margin-bottom: 16px;
}

.early-note {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- CTA Section --- */
.section-cta {
  text-align: center;
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  padding: 100px 0;
}
.section-cta h2 {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.section-cta p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 40px;
  line-height: 1.8;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-suboffer {
  margin-top: 20px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* --- Floating CTA --- */
.floating-cta {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 90;
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.floating-cta.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.floating-cta .btn {
  box-shadow: 0 4px 24px rgba(6, 199, 85, 0.3);
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}
.footer-content {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 32px;
}
.footer-tagline {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.footer-links a:hover { color: var(--gold); }

.footer-contact {
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.footer-contact a { color: var(--text-secondary); }
.footer-contact a:hover { color: var(--gold); }

.footer-disclaimer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  margin-bottom: 16px;
}
.footer-disclaimer p {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.footer-disclaimer a { color: var(--text-muted); text-decoration: underline; }

.footer-bottom {
  text-align: center;
}
.footer-bottom p {
  font-family: var(--font-en);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ===========================
   Gold decorative elements
   =========================== */

/* Section divider - wave pattern */
.section-dark::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-dark), transparent);
  opacity: 0.3;
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }

  /* Mobile menu */
  .nav-menu.active {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    padding: 32px 24px;
    gap: 0;
    z-index: 99;
  }
  .nav-menu.active li { border-bottom: 1px solid var(--border); }
  .nav-menu.active a {
    display: block;
    padding: 16px 0;
    font-size: 1rem;
  }
  .nav-menu.active .nav-menu-cta { display: list-item; }
  .nav-menu.active .nav-menu-cta a { color: var(--gold); font-weight: 700; }

  .hero { min-height: 100vh; padding: 100px 0 60px; }
  .hero::before { background-position: center 30%; }
  .hero h1 { font-size: 1.75rem; }
  .hero-description { font-size: 0.9375rem; }
  .hero-description br { display: none; }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
    padding: 24px;
    width: 100%;
    display: flex;
  }
  .stat-divider {
    width: 80px;
    height: 1px;
  }
  .stat-number { font-size: 2rem; }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  .hero-cta .btn { width: 100%; max-width: 320px; }

  .problem-grid,
  .promise-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }

  .pricing-recommended { transform: none; }

  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }
  .section-header h2 { font-size: 1.5rem; }

  .approach-comparison {
    flex-direction: column;
    gap: 16px;
  }

  .stage-header,
  .stage-body,
  .stage-result { padding-left: 20px; padding-right: 20px; }

  .simulation-grid {
    flex-direction: column;
    gap: 16px;
  }

  .performance-table { font-size: 0.8125rem; }
  .performance-table th,
  .performance-table td { padding: 10px 12px; }

  .footer-content {
    flex-direction: column;
    gap: 24px;
  }
  .footer-links {
    flex-direction: column;
    gap: 12px;
  }

  .section-cta h2 { font-size: 1.5rem; }

  .floating-cta {
    bottom: 16px;
    right: 16px;
    left: 16px;
  }
  .floating-cta .btn {
    width: 100%;
  }
}

/* --- Animations --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-badge,
.hero h1,
.hero-lead,
.hero-description,
.hero-stats,
.hero-cta {
  animation: fadeUp 0.8s ease-out both;
}
.hero h1 { animation-delay: 0.1s; }
.hero-lead { animation-delay: 0.15s; }
.hero-description { animation-delay: 0.2s; }
.hero-stats { animation-delay: 0.3s; }
.hero-cta { animation-delay: 0.4s; }

/* Gold shimmer for key numbers */
@keyframes goldPulse {
  0%, 100% { text-shadow: 0 0 15px rgba(255, 215, 0, 0.3); }
  50% { text-shadow: 0 0 25px rgba(255, 215, 0, 0.5); }
}
.roi-highlight {
  animation: goldPulse 3s ease-in-out infinite;
}